+++ /dev/null
-/*
- * H263/MPEG4 backend for ffmpeg encoder and decoder
- * Copyright (c) 2000,2001 Fabrice Bellard.
- * H263+ support.
- * Copyright (c) 2001 Juan J. Sierralta P.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * ac prediction encoding, b-frame support, error resilience, optimizations,
- * qpel decoding, gmc decoding, interlaced decoding,
- * by Michael Niedermayer <michaelni@gmx.at>
- */
-
-/**
- * @file h263.c
- * h263/mpeg4 codec.
- */
-
-//#define DEBUG
-#include "common.h"
-#include "dsputil.h"
-#include "avcodec.h"
-#include "mpegvideo.h"
-#include "h263data.h"
-#include "mpeg4data.h"
-
-//#undef NDEBUG
-//#include <assert.h>
-
-#define INTRA_MCBPC_VLC_BITS 6
-#define INTER_MCBPC_VLC_BITS 7
-#define CBPY_VLC_BITS 6
-#define MV_VLC_BITS 9
-#define DC_VLC_BITS 9
-#define SPRITE_TRAJ_VLC_BITS 6
-#define MB_TYPE_B_VLC_BITS 4
-#define TEX_VLC_BITS 9
-
-#ifdef CONFIG_ENCODERS
-static void h263_encode_block(MpegEncContext * s, DCTELEM * block,
- int n);
-static void h263_encode_motion(MpegEncContext * s, int val, int fcode);
-static void h263p_encode_umotion(MpegEncContext * s, int val);
-static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block,
- int n, int dc, uint8_t *scan_table,
- PutBitContext *dc_pb, PutBitContext *ac_pb);
-#endif
-
-static int h263_decode_motion(MpegEncContext * s, int pred, int fcode);
-static int h263p_decode_umotion(MpegEncContext * s, int pred);
-static int h263_decode_block(MpegEncContext * s, DCTELEM * block,
- int n, int coded);
-static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr);
-static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
- int n, int coded, int intra, int rvlc);
-static int h263_pred_dc(MpegEncContext * s, int n, uint16_t **dc_val_ptr);
-#ifdef CONFIG_ENCODERS
-static void mpeg4_inv_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
- int dir);
-static void mpeg4_encode_visual_object_header(MpegEncContext * s);
-static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number);
-#endif //CONFIG_ENCODERS
-static void mpeg4_decode_sprite_trajectory(MpegEncContext * s);
-static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, uint16_t **dc_val_ptr, int *dir_ptr);
-
-#ifdef CONFIG_ENCODERS
-static uint8_t uni_DCtab_lum_len[512];
-static uint8_t uni_DCtab_chrom_len[512];
-static uint16_t uni_DCtab_lum_bits[512];
-static uint16_t uni_DCtab_chrom_bits[512];
-
-static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
-static uint8_t fcode_tab[MAX_MV*2+1];
-static uint8_t umv_fcode_tab[MAX_MV*2+1];
-
-static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2];
-static uint8_t uni_mpeg4_intra_rl_len [64*64*2*2];
-static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2];
-static uint8_t uni_mpeg4_inter_rl_len [64*64*2*2];
-//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level))
-//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64)
-#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level))
-
-/* mpeg4
-inter
-max level: 24/6
-max run: 53/63
-
-intra
-max level: 53/16
-max run: 29/41
-*/
-#endif
-
-#if 0 //3IV1 is quite rare and tis slows things down a tiny bit
-#define IS_3IV1 s->avctx->codec_tag == ff_get_fourcc("3IV1")
-#else
-#define IS_3IV1 0
-#endif
-
-int h263_get_picture_format(int width, int height)
-{
- int format;
-
- if (width == 128 && height == 96)
- format = 1;
- else if (width == 176 && height == 144)
- format = 2;
- else if (width == 352 && height == 288)
- format = 3;
- else if (width == 704 && height == 576)
- format = 4;
- else if (width == 1408 && height == 1152)
- format = 5;
- else
- format = 7;
- return format;
-}
-
-#ifdef CONFIG_ENCODERS
-
-static void float_aspect_to_info(MpegEncContext * s, float aspect){
- int i;
-
- aspect*= s->height/(double)s->width;
-//printf("%f\n", aspect);
-
- if(aspect==0) aspect= 1.0;
-
- ff_float2fraction(&s->aspected_width, &s->aspected_height, aspect, 255);
-
-//printf("%d %d\n", s->aspected_width, s->aspected_height);
- for(i=1; i<6; i++){
- if(s->aspected_width == pixel_aspect[i][0] && s->aspected_height== pixel_aspect[i][1]){
- s->aspect_ratio_info=i;
- return;
- }
- }
-
- s->aspect_ratio_info= FF_ASPECT_EXTENDED;
-}
-
-void ff_flv_encode_picture_header(MpegEncContext * s, int picture_number)
-{
- int format;
-
- align_put_bits(&s->pb);
-
- put_bits(&s->pb, 17, 1);
- put_bits(&s->pb, 5, (s->h263_flv-1)); /* 0: h263 escape codes 1: 11-bit escape codes */
- put_bits(&s->pb, 8, (((int64_t)s->picture_number * 30 * s->avctx->frame_rate_base) /
- s->avctx->frame_rate) & 0xff); /* TemporalReference */
- if (s->width == 352 && s->height == 288)
- format = 2;
- else if (s->width == 176 && s->height == 144)
- format = 3;
- else if (s->width == 128 && s->height == 96)
- format = 4;
- else if (s->width == 320 && s->height == 240)
- format = 5;
- else if (s->width == 160 && s->height == 120)
- format = 6;
- else if (s->width <= 255 && s->height <= 255)
- format = 0; /* use 1 byte width & height */
- else
- format = 1; /* use 2 bytes width & height */
- put_bits(&s->pb, 3, format); /* PictureSize */
- if (format == 0) {
- put_bits(&s->pb, 8, s->width);
- put_bits(&s->pb, 8, s->height);
- } else if (format == 1) {
- put_bits(&s->pb, 16, s->width);
- put_bits(&s->pb, 16, s->height);
- }
- put_bits(&s->pb, 2, s->pict_type == P_TYPE); /* PictureType */
- put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */
- put_bits(&s->pb, 5, s->qscale); /* Quantizer */
- put_bits(&s->pb, 1, 0); /* ExtraInformation */
-
- if(s->h263_aic){
- s->y_dc_scale_table=
- s->c_dc_scale_table= h263_aic_dc_scale_table;
- }else{
- s->y_dc_scale_table=
- s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
- }
-}
-
-void h263_encode_picture_header(MpegEncContext * s, int picture_number)
-{
- int format;
-
- align_put_bits(&s->pb);
-
- /* Update the pointer to last GOB */
- s->ptr_lastgob = pbBufPtr(&s->pb);
- s->gob_number = 0;
-
- put_bits(&s->pb, 22, 0x20); /* PSC */
- put_bits(&s->pb, 8, (((int64_t)s->picture_number * 30 * s->avctx->frame_rate_base) /
- s->avctx->frame_rate) & 0xff);
-
- put_bits(&s->pb, 1, 1); /* marker */
- put_bits(&s->pb, 1, 0); /* h263 id */
- put_bits(&s->pb, 1, 0); /* split screen off */
- put_bits(&s->pb, 1, 0); /* camera off */
- put_bits(&s->pb, 1, 0); /* freeze picture release off */
-
- format = h263_get_picture_format(s->width, s->height);
- if (!s->h263_plus) {
- /* H.263v1 */
- put_bits(&s->pb, 3, format);
- put_bits(&s->pb, 1, (s->pict_type == P_TYPE));
- /* By now UMV IS DISABLED ON H.263v1, since the restrictions
- of H.263v1 UMV implies to check the predicted MV after
- calculation of the current MB to see if we're on the limits */
- put_bits(&s->pb, 1, 0); /* unrestricted motion vector: off */
- put_bits(&s->pb, 1, 0); /* SAC: off */
- put_bits(&s->pb, 1, 0); /* advanced prediction mode: off */
- put_bits(&s->pb, 1, 0); /* not PB frame */
- put_bits(&s->pb, 5, s->qscale);
- put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */
- } else {
- /* H.263v2 */
- /* H.263 Plus PTYPE */
- put_bits(&s->pb, 3, 7);
- put_bits(&s->pb,3,1); /* Update Full Extended PTYPE */
- if (format == 7)
- put_bits(&s->pb,3,6); /* Custom Source Format */
- else
- put_bits(&s->pb, 3, format);
-
- put_bits(&s->pb,1,0); /* Custom PCF: off */
- s->umvplus = s->unrestricted_mv;
- put_bits(&s->pb, 1, s->umvplus); /* Unrestricted Motion Vector */
- put_bits(&s->pb,1,0); /* SAC: off */
- put_bits(&s->pb,1,0); /* Advanced Prediction Mode: off */
- put_bits(&s->pb,1,s->h263_aic); /* Advanced Intra Coding */
- put_bits(&s->pb,1,0); /* Deblocking Filter: off */
- put_bits(&s->pb,1,0); /* Slice Structured: off */
- put_bits(&s->pb,1,0); /* Reference Picture Selection: off */
- put_bits(&s->pb,1,0); /* Independent Segment Decoding: off */
- put_bits(&s->pb,1,0); /* Alternative Inter VLC: off */
- put_bits(&s->pb,1,0); /* Modified Quantization: off */
- put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
- put_bits(&s->pb,3,0); /* Reserved */
-
- put_bits(&s->pb, 3, s->pict_type == P_TYPE);
-
- put_bits(&s->pb,1,0); /* Reference Picture Resampling: off */
- put_bits(&s->pb,1,0); /* Reduced-Resolution Update: off */
- put_bits(&s->pb,1,s->no_rounding); /* Rounding Type */
- put_bits(&s->pb,2,0); /* Reserved */
- put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
-
- /* This should be here if PLUSPTYPE */
- put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */
-
- if (format == 7) {
- /* Custom Picture Format (CPFMT) */
- float_aspect_to_info(s, s->avctx->aspect_ratio);
-
- put_bits(&s->pb,4,s->aspect_ratio_info);
- put_bits(&s->pb,9,(s->width >> 2) - 1);
- put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
- put_bits(&s->pb,9,(s->height >> 2));
- if (s->aspect_ratio_info == FF_ASPECT_EXTENDED)
- {
- put_bits(&s->pb, 8, s->aspected_width);
- put_bits(&s->pb, 8, s->aspected_height);
- }
- }
-
- /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */
- if (s->umvplus)
-// put_bits(&s->pb,1,1); /* Limited according tables of Annex D */
- put_bits(&s->pb,2,1); /* unlimited */
-
- put_bits(&s->pb, 5, s->qscale);
- }
-
- put_bits(&s->pb, 1, 0); /* no PEI */
-
- if(s->h263_aic){
- s->y_dc_scale_table=
- s->c_dc_scale_table= h263_aic_dc_scale_table;
- }else{
- s->y_dc_scale_table=
- s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
- }
-}
-
-/**
- * Encodes a group of blocks header.
- */
-int h263_encode_gob_header(MpegEncContext * s, int mb_line)
-{
- align_put_bits(&s->pb);
- flush_put_bits(&s->pb);
- /* Call the RTP callback to send the last GOB */
- if (s->rtp_callback) {
- int pdif = pbBufPtr(&s->pb) - s->ptr_lastgob;
- s->rtp_callback(s->ptr_lastgob, pdif, s->gob_number);
- }
- put_bits(&s->pb, 17, 1); /* GBSC */
- s->gob_number = mb_line / s->gob_index;
- put_bits(&s->pb, 5, s->gob_number); /* GN */
- put_bits(&s->pb, 2, s->pict_type == I_TYPE); /* GFID */
- put_bits(&s->pb, 5, s->qscale); /* GQUANT */
- //fprintf(stderr,"\nGOB: %2d size: %d", s->gob_number - 1, pdif);
- return 0;
-}
-
-static inline int decide_ac_pred(MpegEncContext * s, DCTELEM block[6][64], int dir[6])
-{
- int score0=0, score1=0;
- int i, n;
- int8_t * const qscale_table= s->current_picture.qscale_table;
-
- for(n=0; n<6; n++){
- int16_t *ac_val, *ac_val1;
-
- ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
- ac_val1= ac_val;
- if(dir[n]){
- const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
- /* top prediction */
- ac_val-= s->block_wrap[n]*16;
- if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
- /* same qscale */
- for(i=1; i<8; i++){
- const int level= block[n][s->dsp.idct_permutation[i ]];
- score0+= ABS(level);
- score1+= ABS(level - ac_val[i+8]);
- ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]];
- ac_val1[i+8]= level;
- }
- }else{
- /* different qscale, we must rescale */
- for(i=1; i<8; i++){
- const int level= block[n][s->dsp.idct_permutation[i ]];
- score0+= ABS(level);
- score1+= ABS(level - ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale));
- ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]];
- ac_val1[i+8]= level;
- }
- }
- }else{
- const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
- /* left prediction */
- ac_val-= 16;
- if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
- /* same qscale */
- for(i=1; i<8; i++){
- const int level= block[n][s->dsp.idct_permutation[i<<3]];
- score0+= ABS(level);
- score1+= ABS(level - ac_val[i]);
- ac_val1[i ]= level;
- ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
- }
- }else{
- /* different qscale, we must rescale */
- for(i=1; i<8; i++){
- const int level= block[n][s->dsp.idct_permutation[i<<3]];
- score0+= ABS(level);
- score1+= ABS(level - ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale));
- ac_val1[i ]= level;
- ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]];
- }
- }
- }
- }
-
- return score0 > score1 ? 1 : 0;
-}
-
-/**
- * modify qscale so that encoding is acually possible in h263 (limit difference to -2..2)
- */
-void ff_clean_h263_qscales(MpegEncContext *s){
- int i;
- int8_t * const qscale_table= s->current_picture.qscale_table;
-
- for(i=1; i<s->mb_num; i++){
- if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i-1] ] >2)
- qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i-1] ]+2;
- }
- for(i=s->mb_num-2; i>=0; i--){
- if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i+1] ] >2)
- qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i+1] ]+2;
- }
-}
-
-/**
- * modify mb_type & qscale so that encoding is acually possible in mpeg4
- */
-void ff_clean_mpeg4_qscales(MpegEncContext *s){
- int i;
- int8_t * const qscale_table= s->current_picture.qscale_table;
-
- ff_clean_h263_qscales(s);
-
- for(i=1; i<s->mb_num; i++){
- int mb_xy= s->mb_index2xy[i];
-
- if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&MB_TYPE_INTER4V)){
- s->mb_type[mb_xy]&= ~MB_TYPE_INTER4V;
- s->mb_type[mb_xy]|= MB_TYPE_INTER;
- }
- }
-
- if(s->pict_type== B_TYPE){
- int odd=0;
- /* ok, come on, this isnt funny anymore, theres more code for handling this mpeg4 mess than
- for the actual adaptive quantization */
-
- for(i=0; i<s->mb_num; i++){
- int mb_xy= s->mb_index2xy[i];
- odd += qscale_table[mb_xy]&1;
- }
-
- if(2*odd > s->mb_num) odd=1;
- else odd=0;
-
- for(i=0; i<s->mb_num; i++){
- int mb_xy= s->mb_index2xy[i];
- if((qscale_table[mb_xy]&1) != odd)
- qscale_table[mb_xy]++;
- if(qscale_table[mb_xy] > 31)
- qscale_table[mb_xy]= 31;
- }
-
- for(i=1; i<s->mb_num; i++){
- int mb_xy= s->mb_index2xy[i];
- if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&MB_TYPE_DIRECT)){
- s->mb_type[mb_xy]&= ~MB_TYPE_DIRECT;
- s->mb_type[mb_xy]|= MB_TYPE_BIDIR;
- }
- }
- }
-}
-
-#endif //CONFIG_ENCODERS
-/**
- *
- * @return the mb_type
- */
-int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my){
- const int mb_index= s->mb_x + s->mb_y*s->mb_stride;
- const int colocated_mb_type= s->next_picture.mb_type[mb_index]; //FIXME or next?
- int xy= s->block_index[0];
- uint16_t time_pp= s->pp_time;
- uint16_t time_pb= s->pb_time;
- int i;
-
- //FIXME avoid divides
-
- if(IS_8X8(colocated_mb_type)){
- s->mv_type = MV_TYPE_8X8;
- for(i=0; i<4; i++){
- xy= s->block_index[i];
- s->mv[0][i][0] = s->motion_val[xy][0]*time_pb/time_pp + mx;
- s->mv[0][i][1] = s->motion_val[xy][1]*time_pb/time_pp + my;
- s->mv[1][i][0] = mx ? s->mv[0][i][0] - s->motion_val[xy][0]
- : s->motion_val[xy][0]*(time_pb - time_pp)/time_pp;
- s->mv[1][i][1] = my ? s->mv[0][i][1] - s->motion_val[xy][1]
- : s->motion_val[xy][1]*(time_pb - time_pp)/time_pp;
- }
- return MB_TYPE_DIRECT2 | MB_TYPE_8x8 | MB_TYPE_L0L1;
- } else if(IS_INTERLACED(colocated_mb_type)){
- s->mv_type = MV_TYPE_FIELD;
- for(i=0; i<2; i++){
- if(s->top_field_first){
- time_pp= s->pp_field_time - s->field_select_table[mb_index][i] + i;
- time_pb= s->pb_field_time - s->field_select_table[mb_index][i] + i;
- }else{
- time_pp= s->pp_field_time + s->field_select_table[mb_index][i] - i;
- time_pb= s->pb_field_time + s->field_select_table[mb_index][i] - i;
- }
- s->mv[0][i][0] = s->field_mv_table[mb_index][i][0]*time_pb/time_pp + mx;
- s->mv[0][i][1] = s->field_mv_table[mb_index][i][1]*time_pb/time_pp + my;
- s->mv[1][i][0] = mx ? s->mv[0][i][0] - s->field_mv_table[mb_index][i][0]
- : s->field_mv_table[mb_index][i][0]*(time_pb - time_pp)/time_pp;
- s->mv[1][i][1] = my ? s->mv[0][i][1] - s->field_mv_table[mb_index][i][1]
- : s->field_mv_table[mb_index][i][1]*(time_pb - time_pp)/time_pp;
- }
- return MB_TYPE_DIRECT2 | MB_TYPE_16x8 | MB_TYPE_L0L1 | MB_TYPE_INTERLACED;
- }else{
- s->mv[0][0][0] = s->mv[0][1][0] = s->mv[0][2][0] = s->mv[0][3][0] = s->motion_val[xy][0]*time_pb/time_pp + mx;
- s->mv[0][0][1] = s->mv[0][1][1] = s->mv[0][2][1] = s->mv[0][3][1] = s->motion_val[xy][1]*time_pb/time_pp + my;
- s->mv[1][0][0] = s->mv[1][1][0] = s->mv[1][2][0] = s->mv[1][3][0] = mx ? s->mv[0][0][0] - s->motion_val[xy][0]
- : s->motion_val[xy][0]*(time_pb - time_pp)/time_pp;
- s->mv[1][0][1] = s->mv[1][1][1] = s->mv[1][2][1] = s->mv[1][3][1] = my ? s->mv[0][0][1] - s->motion_val[xy][1]
- : s->motion_val[xy][1]*(time_pb - time_pp)/time_pp;
- if((s->avctx->workaround_bugs & FF_BUG_DIRECT_BLOCKSIZE) || !s->quarter_sample)
- s->mv_type= MV_TYPE_16X16;
- else
- s->mv_type= MV_TYPE_8X8;
- return MB_TYPE_DIRECT2 | MB_TYPE_16x16 | MB_TYPE_L0L1; //Note see prev line
- }
-}
-
-void ff_h263_update_motion_val(MpegEncContext * s){
- const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
- //FIXME a lot of thet is only needed for !low_delay
- const int wrap = s->block_wrap[0];
- const int xy = s->block_index[0];
-
- s->current_picture.mbskip_table[mb_xy]= s->mb_skiped;
-
- if(s->mv_type != MV_TYPE_8X8){
- int motion_x, motion_y;
- if (s->mb_intra) {
- motion_x = 0;
- motion_y = 0;
- } else if (s->mv_type == MV_TYPE_16X16) {
- motion_x = s->mv[0][0][0];
- motion_y = s->mv[0][0][1];
- } else /*if (s->mv_type == MV_TYPE_FIELD)*/ {
- int i;
- motion_x = s->mv[0][0][0] + s->mv[0][1][0];
- motion_y = s->mv[0][0][1] + s->mv[0][1][1];
- motion_x = (motion_x>>1) | (motion_x&1);
- for(i=0; i<2; i++){
- s->field_mv_table[mb_xy][i][0]= s->mv[0][i][0];
- s->field_mv_table[mb_xy][i][1]= s->mv[0][i][1];
- s->field_select_table[mb_xy][i]= s->field_select[0][i];
- }
- }
-
- /* no update if 8X8 because it has been done during parsing */
- s->motion_val[xy][0] = motion_x;
- s->motion_val[xy][1] = motion_y;
- s->motion_val[xy + 1][0] = motion_x;
- s->motion_val[xy + 1][1] = motion_y;
- s->motion_val[xy + wrap][0] = motion_x;
- s->motion_val[xy + wrap][1] = motion_y;
- s->motion_val[xy + 1 + wrap][0] = motion_x;
- s->motion_val[xy + 1 + wrap][1] = motion_y;
- }
-
- if(s->encoding){ //FIXME encoding MUST be cleaned up
- if (s->mv_type == MV_TYPE_8X8)
- s->current_picture.mb_type[mb_xy]= MB_TYPE_L0 | MB_TYPE_8x8;
- else
- s->current_picture.mb_type[mb_xy]= MB_TYPE_L0 | MB_TYPE_16x16;
- }
-}
-
-#ifdef CONFIG_ENCODERS
-void mpeg4_encode_mb(MpegEncContext * s,
- DCTELEM block[6][64],
- int motion_x, int motion_y)
-{
- int cbpc, cbpy, pred_x, pred_y;
- PutBitContext * const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
- PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=B_TYPE ? &s->tex_pb : &s->pb;
- PutBitContext * const dc_pb = s->data_partitioning && s->pict_type!=I_TYPE ? &s->pb2 : &s->pb;
- const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
- const int dquant_code[5]= {1,0,9,2,3};
-
- // printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);
- if (!s->mb_intra) {
- /* compute cbp */
- int i, cbp = 0;
- for (i = 0; i < 6; i++) {
- if (s->block_last_index[i] >= 0)
- cbp |= 1 << (5 - i);
- }
-
- if(s->pict_type==B_TYPE){
- static const int mb_type_table[8]= {-1, 2, 3, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */
- int mb_type= mb_type_table[s->mv_dir];
-
- if(s->mb_x==0){
- s->last_mv[0][0][0]=
- s->last_mv[0][0][1]=
- s->last_mv[1][0][0]=
- s->last_mv[1][0][1]= 0;
- }
-
- assert(s->dquant>=-2 && s->dquant<=2);
- assert((s->dquant&1)==0);
- assert(mb_type>=0);
-
- /* nothing to do if this MB was skiped in the next P Frame */
- if(s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]){ //FIXME avoid DCT & ...
- s->skip_count++;
- s->mv[0][0][0]=
- s->mv[0][0][1]=
- s->mv[1][0][0]=
- s->mv[1][0][1]= 0;
- s->mv_dir= MV_DIR_FORWARD; //doesnt matter
- s->qscale -= s->dquant;
-// s->mb_skiped=1;
-
- return;
- }
-
- if ((cbp | motion_x | motion_y | mb_type) ==0) {
- /* direct MB with MV={0,0} */
- assert(s->dquant==0);
-
- put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
-
- if(interleaved_stats){
- s->misc_bits++;
- s->last_bits++;
- }
- s->skip_count++;
- return;
- }
-
- put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
- put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge
- put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we dont need it :)
- if(cbp) put_bits(&s->pb, 6, cbp);
-
- if(cbp && mb_type){
- if(s->dquant)
- put_bits(&s->pb, 2, (s->dquant>>2)+3);
- else
- put_bits(&s->pb, 1, 0);
- }else
- s->qscale -= s->dquant;
-
- if(!s->progressive_sequence){
- if(cbp)
- put_bits(&s->pb, 1, s->interlaced_dct);
- if(mb_type) // not diect mode
- put_bits(&s->pb, 1, 0); // no interlaced ME yet
- }
-
- if(interleaved_stats){
- s->misc_bits+= get_bits_diff(s);
- }
-
- switch(mb_type)
- {
- case 0: /* direct */
- h263_encode_motion(s, motion_x, 1);
- h263_encode_motion(s, motion_y, 1);
- s->b_count++;
- s->f_count++;
- break;
- case 1: /* bidir */
- h263_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
- h263_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
- h263_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
- h263_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
- s->last_mv[0][0][0]= s->mv[0][0][0];
- s->last_mv[0][0][1]= s->mv[0][0][1];
- s->last_mv[1][0][0]= s->mv[1][0][0];
- s->last_mv[1][0][1]= s->mv[1][0][1];
- s->b_count++;
- s->f_count++;
- break;
- case 2: /* backward */
- h263_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code);
- h263_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code);
- s->last_mv[1][0][0]= motion_x;
- s->last_mv[1][0][1]= motion_y;
- s->b_count++;
- break;
- case 3: /* forward */
- h263_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
- h263_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
- s->last_mv[0][0][0]= motion_x;
- s->last_mv[0][0][1]= motion_y;
- s->f_count++;
- break;
- default:
- printf("unknown mb type\n");
- return;
- }
-
- if(interleaved_stats){
- s->mv_bits+= get_bits_diff(s);
- }
-
- /* encode each block */
- for (i = 0; i < 6; i++) {
- mpeg4_encode_block(s, block[i], i, 0, s->intra_scantable.permutated, NULL, &s->pb);
- }
-
- if(interleaved_stats){
- s->p_tex_bits+= get_bits_diff(s);
- }
- }else{ /* s->pict_type==B_TYPE */
- if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16) {
- /* check if the B frames can skip it too, as we must skip it if we skip here
- why didnt they just compress the skip-mb bits instead of reusing them ?! */
- if(s->max_b_frames>0){
- int i;
- int x,y, offset;
- uint8_t *p_pic;
-
- x= s->mb_x*16;
- y= s->mb_y*16;
- if(x+16 > s->width) x= s->width-16;
- if(y+16 > s->height) y= s->height-16;
-
- offset= x + y*s->linesize;
- p_pic= s->new_picture.data[0] + offset;
-
- s->mb_skiped=1;
- for(i=0; i<s->max_b_frames; i++){
- uint8_t *b_pic;
- int diff;
- Picture *pic= s->reordered_input_picture[i+1];
-
- if(pic==NULL || pic->pict_type!=B_TYPE) break;
-
- b_pic= pic->data[0] + offset + 16; //FIXME +16
- diff= s->dsp.pix_abs16x16(p_pic, b_pic, s->linesize);
- if(diff>s->qscale*70){ //FIXME check that 70 is optimal
- s->mb_skiped=0;
- break;
- }
- }
- }else
- s->mb_skiped=1;
-
- if(s->mb_skiped==1){
- /* skip macroblock */
- put_bits(&s->pb, 1, 1);
-
- if(interleaved_stats){
- s->misc_bits++;
- s->last_bits++;
- }
- s->skip_count++;
-
- return;
- }
- }
-
- put_bits(&s->pb, 1, 0); /* mb coded */
- if(s->mv_type==MV_TYPE_16X16){
- cbpc = cbp & 3;
- if(s->dquant) cbpc+= 8;
- put_bits(&s->pb,
- inter_MCBPC_bits[cbpc],
- inter_MCBPC_code[cbpc]);
-
- cbpy = cbp >> 2;
- cbpy ^= 0xf;
- put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
- if(s->dquant)
- put_bits(pb2, 2, dquant_code[s->dquant+2]);
-
- if(!s->progressive_sequence){
- if(cbp)
- put_bits(pb2, 1, s->interlaced_dct);
- put_bits(pb2, 1, 0); // no interlaced ME yet
- }
-
- if(interleaved_stats){
- s->misc_bits+= get_bits_diff(s);
- }
-
- /* motion vectors: 16x16 mode */
- h263_pred_motion(s, 0, &pred_x, &pred_y);
-
- h263_encode_motion(s, motion_x - pred_x, s->f_code);
- h263_encode_motion(s, motion_y - pred_y, s->f_code);
- }else{
- cbpc = (cbp & 3)+16;
- put_bits(&s->pb,
- inter_MCBPC_bits[cbpc],
- inter_MCBPC_code[cbpc]);
- cbpy = cbp >> 2;
- cbpy ^= 0xf;
- put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
-
- if(!s->progressive_sequence){
- if(cbp)
- put_bits(pb2, 1, s->interlaced_dct);
- }
-
- if(interleaved_stats){
- s->misc_bits+= get_bits_diff(s);
- }
-
- for(i=0; i<4; i++){
- /* motion vectors: 8x8 mode*/
- h263_pred_motion(s, i, &pred_x, &pred_y);
-
- h263_encode_motion(s, s->motion_val[ s->block_index[i] ][0] - pred_x, s->f_code);
- h263_encode_motion(s, s->motion_val[ s->block_index[i] ][1] - pred_y, s->f_code);
- }
- }
-
- if(interleaved_stats){
- s->mv_bits+= get_bits_diff(s);
- }
-
- /* encode each block */
- for (i = 0; i < 6; i++) {
- mpeg4_encode_block(s, block[i], i, 0, s->intra_scantable.permutated, NULL, tex_pb);
- }
-
- if(interleaved_stats){
- s->p_tex_bits+= get_bits_diff(s);
- }
- s->f_count++;
- }
- } else {
- int cbp;
- int dc_diff[6]; //dc values with the dc prediction subtracted
- int dir[6]; //prediction direction
- int zigzag_last_index[6];
- uint8_t *scan_table[6];
- int i;
-
- for(i=0; i<6; i++){
- const int level= block[i][0];
- uint16_t *dc_ptr;
-
- dc_diff[i]= level - ff_mpeg4_pred_dc(s, i, &dc_ptr, &dir[i]);
- if (i < 4) {
- *dc_ptr = level * s->y_dc_scale;
- } else {
- *dc_ptr = level * s->c_dc_scale;
- }
- }
-
- s->ac_pred= decide_ac_pred(s, block, dir);
-
- if(s->ac_pred){
- for(i=0; i<6; i++){
- uint8_t *st;
- int last_index;
-
- mpeg4_inv_pred_ac(s, block[i], i, dir[i]);
- if (dir[i]==0) st = s->intra_v_scantable.permutated; /* left */
- else st = s->intra_h_scantable.permutated; /* top */
-
- for(last_index=63; last_index>=0; last_index--) //FIXME optimize
- if(block[i][st[last_index]]) break;
- zigzag_last_index[i]= s->block_last_index[i];
- s->block_last_index[i]= last_index;
- scan_table[i]= st;
- }
- }else{
- for(i=0; i<6; i++)
- scan_table[i]= s->intra_scantable.permutated;
- }
-
- /* compute cbp */
- cbp = 0;
- for (i = 0; i < 6; i++) {
- if (s->block_last_index[i] >= 1)
- cbp |= 1 << (5 - i);
- }
-
- cbpc = cbp & 3;
- if (s->pict_type == I_TYPE) {
- if(s->dquant) cbpc+=4;
- put_bits(&s->pb,
- intra_MCBPC_bits[cbpc],
- intra_MCBPC_code[cbpc]);
- } else {
- if(s->dquant) cbpc+=8;
- put_bits(&s->pb, 1, 0); /* mb coded */
- put_bits(&s->pb,
- inter_MCBPC_bits[cbpc + 4],
- inter_MCBPC_code[cbpc + 4]);
- }
- put_bits(pb2, 1, s->ac_pred);
- cbpy = cbp >> 2;
- put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
- if(s->dquant)
- put_bits(dc_pb, 2, dquant_code[s->dquant+2]);
-
- if(!s->progressive_sequence){
- put_bits(dc_pb, 1, s->interlaced_dct);
- }
-
- if(interleaved_stats){
- s->misc_bits+= get_bits_diff(s);
- }
-
- /* encode each block */
- for (i = 0; i < 6; i++) {
- mpeg4_encode_block(s, block[i], i, dc_diff[i], scan_table[i], dc_pb, tex_pb);
- }
-
- if(interleaved_stats){
- s->i_tex_bits+= get_bits_diff(s);
- }
- s->i_count++;
-
- /* restore ac coeffs & last_index stuff if we messed them up with the prediction */
- if(s->ac_pred){
- for(i=0; i<6; i++){
- int j;
- int16_t *ac_val;
-
- ac_val = s->ac_val[0][0] + s->block_index[i] * 16;
-
- if(dir[i]){
- for(j=1; j<8; j++)
- block[i][s->dsp.idct_permutation[j ]]= ac_val[j+8];
- }else{
- for(j=1; j<8; j++)
- block[i][s->dsp.idct_permutation[j<<3]]= ac_val[j ];
- }
- s->block_last_index[i]= zigzag_last_index[i];
- }
- }
- }
-}
-
-void h263_encode_mb(MpegEncContext * s,
- DCTELEM block[6][64],
- int motion_x, int motion_y)
-{
- int cbpc, cbpy, i, cbp, pred_x, pred_y;
- int16_t pred_dc;
- int16_t rec_intradc[6];
- uint16_t *dc_ptr[6];
- const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1);
- const int dquant_code[5]= {1,0,9,2,3};
-
- //printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);
- if (!s->mb_intra) {
- /* compute cbp */
- cbp = 0;
- for (i = 0; i < 6; i++) {
- if (s->block_last_index[i] >= 0)
- cbp |= 1 << (5 - i);
- }
- if ((cbp | motion_x | motion_y | s->dquant) == 0) {
- /* skip macroblock */
- put_bits(&s->pb, 1, 1);
- if(interleaved_stats){
- s->misc_bits++;
- s->last_bits++;
- }
- return;
- }
- put_bits(&s->pb, 1, 0); /* mb coded */
- cbpc = cbp & 3;
- if(s->dquant) cbpc+= 8;
- put_bits(&s->pb,
- inter_MCBPC_bits[cbpc],
- inter_MCBPC_code[cbpc]);
- cbpy = cbp >> 2;
- cbpy ^= 0xf;
- put_bits(&s->pb, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
- if(s->dquant)
- put_bits(&s->pb, 2, dquant_code[s->dquant+2]);
-
- if(interleaved_stats){
- s->misc_bits+= get_bits_diff(s);
- }
-
- /* motion vectors: 16x16 mode only now */
- h263_pred_motion(s, 0, &pred_x, &pred_y);
-
- if (!s->umvplus) {
- h263_encode_motion(s, motion_x - pred_x, s->f_code);
- h263_encode_motion(s, motion_y - pred_y, s->f_code);
- }
- else {
- h263p_encode_umotion(s, motion_x - pred_x);
- h263p_encode_umotion(s, motion_y - pred_y);
- if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1))
- /* To prevent Start Code emulation */
- put_bits(&s->pb,1,1);
- }
-
- if(interleaved_stats){
- s->mv_bits+= get_bits_diff(s);
- }
- } else {
- int li = s->h263_aic ? 0 : 1;
-
- cbp = 0;
- for(i=0; i<6; i++) {
- /* Predict DC */
- if (s->h263_aic && s->mb_intra) {
- int16_t level = block[i][0];
-
- pred_dc = h263_pred_dc(s, i, &dc_ptr[i]);
- level -= pred_dc;
- /* Quant */
- if (level < 0)
- level = (level + (s->qscale >> 1))/(s->y_dc_scale);
- else
- level = (level - (s->qscale >> 1))/(s->y_dc_scale);
-
- /* AIC can change CBP */
- if (level == 0 && s->block_last_index[i] == 0)
- s->block_last_index[i] = -1;
- else if (level < -127)
- level = -127;
- else if (level > 127)
- level = 127;
-
- block[i][0] = level;
- /* Reconstruction */
- rec_intradc[i] = (s->y_dc_scale*level) + pred_dc;
- /* Oddify */
- rec_intradc[i] |= 1;
- //if ((rec_intradc[i] % 2) == 0)
- // rec_intradc[i]++;
- /* Clipping */
- if (rec_intradc[i] < 0)
- rec_intradc[i] = 0;
- else if (rec_intradc[i] > 2047)
- rec_intradc[i] = 2047;
-
- /* Update AC/DC tables */
- *dc_ptr[i] = rec_intradc[i];
- }
- /* compute cbp */
- if (s->block_last_index[i] >= li)
- cbp |= 1 << (5 - i);
- }
-
- cbpc = cbp & 3;
- if (s->pict_type == I_TYPE) {
- if(s->dquant) cbpc+=4;
- put_bits(&s->pb,
- intra_MCBPC_bits[cbpc],
- intra_MCBPC_code[cbpc]);
- } else {
- if(s->dquant) cbpc+=8;
- put_bits(&s->pb, 1, 0); /* mb coded */
- put_bits(&s->pb,
- inter_MCBPC_bits[cbpc + 4],
- inter_MCBPC_code[cbpc + 4]);
- }
- if (s->h263_aic) {
- /* XXX: currently, we do not try to use ac prediction */
- put_bits(&s->pb, 1, 0); /* no AC prediction */
- }
- cbpy = cbp >> 2;
- put_bits(&s->pb, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
- if(s->dquant)
- put_bits(&s->pb, 2, dquant_code[s->dquant+2]);
-
- if(interleaved_stats){
- s->misc_bits+= get_bits_diff(s);
- }
- }
-
- for(i=0; i<6; i++) {
- /* encode each block */
- h263_encode_block(s, block[i], i);
-
- /* Update INTRADC for decoding */
- if (s->h263_aic && s->mb_intra) {
- block[i][0] = rec_intradc[i];
-
- }
- }
-
- if(interleaved_stats){
- if (!s->mb_intra) {
- s->p_tex_bits+= get_bits_diff(s);
- s->f_count++;
- }else{
- s->i_tex_bits+= get_bits_diff(s);
- s->i_count++;
- }
- }
-}
-#endif
-
-static int h263_pred_dc(MpegEncContext * s, int n, uint16_t **dc_val_ptr)
-{
- int x, y, wrap, a, c, pred_dc, scale;
- int16_t *dc_val, *ac_val;
-
- /* find prediction */
- if (n < 4) {
- x = 2 * s->mb_x + 1 + (n & 1);
- y = 2 * s->mb_y + 1 + ((n & 2) >> 1);
- wrap = s->mb_width * 2 + 2;
- dc_val = s->dc_val[0];
- ac_val = s->ac_val[0][0];
- scale = s->y_dc_scale;
- } else {
- x = s->mb_x + 1;
- y = s->mb_y + 1;
- wrap = s->mb_width + 2;
- dc_val = s->dc_val[n - 4 + 1];
- ac_val = s->ac_val[n - 4 + 1][0];
- scale = s->c_dc_scale;
- }
- /* B C
- * A X
- */
- a = dc_val[(x - 1) + (y) * wrap];
- c = dc_val[(x) + (y - 1) * wrap];
-
- /* No prediction outside GOB boundary */
- if (s->first_slice_line && ((n < 2) || (n > 3)))
- c = 1024;
- pred_dc = 1024;
- /* just DC prediction */
- if (a != 1024 && c != 1024)
- pred_dc = (a + c) >> 1;
- else if (a != 1024)
- pred_dc = a;
- else
- pred_dc = c;
-
- /* we assume pred is positive */
- //pred_dc = (pred_dc + (scale >> 1)) / scale;
- *dc_val_ptr = &dc_val[x + y * wrap];
- return pred_dc;
-}
-
-static void h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n)
-{
- int x, y, wrap, a, c, pred_dc, scale, i;
- int16_t *dc_val, *ac_val, *ac_val1;
-
- /* find prediction */
- if (n < 4) {
- x = 2 * s->mb_x + 1 + (n & 1);
- y = 2 * s->mb_y + 1 + ((n & 2) >> 1);
- wrap = s->mb_width * 2 + 2;
- dc_val = s->dc_val[0];
- ac_val = s->ac_val[0][0];
- scale = s->y_dc_scale;
- } else {
- x = s->mb_x + 1;
- y = s->mb_y + 1;
- wrap = s->mb_width + 2;
- dc_val = s->dc_val[n - 4 + 1];
- ac_val = s->ac_val[n - 4 + 1][0];
- scale = s->c_dc_scale;
- }
-
- ac_val += ((y) * wrap + (x)) * 16;
- ac_val1 = ac_val;
-
- /* B C
- * A X
- */
- a = dc_val[(x - 1) + (y) * wrap];
- c = dc_val[(x) + (y - 1) * wrap];
-
- /* No prediction outside GOB boundary */
- if (s->first_slice_line && ((n < 2) || (n > 3)))
- c = 1024;
- pred_dc = 1024;
- if (s->ac_pred) {
- if (s->h263_aic_dir) {
- /* left prediction */
- if (a != 1024) {
- ac_val -= 16;
- for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i<<3]] += ac_val[i];
- }
- pred_dc = a;
- }
- } else {
- /* top prediction */
- if (c != 1024) {
- ac_val -= 16 * wrap;
- for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i ]] += ac_val[i + 8];
- }
- pred_dc = c;
- }
- }
- } else {
- /* just DC prediction */
- if (a != 1024 && c != 1024)
- pred_dc = (a + c) >> 1;
- else if (a != 1024)
- pred_dc = a;
- else
- pred_dc = c;
- }
-
- /* we assume pred is positive */
- block[0]=block[0]*scale + pred_dc;
-
- if (block[0] < 0)
- block[0] = 0;
- else if (!(block[0] & 1))
- block[0]++;
-
- /* Update AC/DC tables */
- dc_val[(x) + (y) * wrap] = block[0];
-
- /* left copy */
- for(i=1;i<8;i++)
- ac_val1[i ] = block[s->dsp.idct_permutation[i<<3]];
- /* top copy */
- for(i=1;i<8;i++)
- ac_val1[8 + i] = block[s->dsp.idct_permutation[i ]];
-}
-
-int16_t *h263_pred_motion(MpegEncContext * s, int block,
- int *px, int *py)
-{
- int xy, wrap;
- int16_t *A, *B, *C, *mot_val;
- static const int off[4]= {2, 1, 1, -1};
-
- wrap = s->block_wrap[0];
- xy = s->block_index[block];
-
- mot_val = s->motion_val[xy];
-
- A = s->motion_val[xy - 1];
- /* special case for first (slice) line */
- if (s->first_slice_line && block<3) {
- // we cant just change some MVs to simulate that as we need them for the B frames (and ME)
- // and if we ever support non rectangular objects than we need to do a few ifs here anyway :(
- if(block==0){ //most common case
- if(s->mb_x == s->resync_mb_x){ //rare
- *px= *py = 0;
- }else if(s->mb_x + 1 == s->resync_mb_x){ //rare
- C = s->motion_val[xy + off[block] - wrap];
- if(s->mb_x==0){
- *px = C[0];
- *py = C[1];
- }else{
- *px = mid_pred(A[0], 0, C[0]);
- *py = mid_pred(A[1], 0, C[1]);
- }
- }else{
- *px = A[0];
- *py = A[1];
- }
- }else if(block==1){
- if(s->mb_x + 1 == s->resync_mb_x){ //rare
- C = s->motion_val[xy + off[block] - wrap];
- *px = mid_pred(A[0], 0, C[0]);
- *py = mid_pred(A[1], 0, C[1]);
- }else{
- *px = A[0];
- *py = A[1];
- }
- }else{ /* block==2*/
- B = s->motion_val[xy - wrap];
- C = s->motion_val[xy + off[block] - wrap];
- if(s->mb_x == s->resync_mb_x) //rare
- A[0]=A[1]=0;
-
- *px = mid_pred(A[0], B[0], C[0]);
- *py = mid_pred(A[1], B[1], C[1]);
- }
- } else {
- B = s->motion_val[xy - wrap];
- C = s->motion_val[xy + off[block] - wrap];
- *px = mid_pred(A[0], B[0], C[0]);
- *py = mid_pred(A[1], B[1], C[1]);
- }
- return mot_val;
-}
-
-#ifdef CONFIG_ENCODERS
-static void h263_encode_motion(MpegEncContext * s, int val, int f_code)
-{
- int range, l, bit_size, sign, code, bits;
-
- if (val == 0) {
- /* zero vector */
- code = 0;
- put_bits(&s->pb, mvtab[code][1], mvtab[code][0]);
- } else {
- bit_size = f_code - 1;
- range = 1 << bit_size;
- /* modulo encoding */
- l = range * 32;
-#if 1
- val+= l;
- val&= 2*l-1;
- val-= l;
- sign = val>>31;
- val= (val^sign)-sign;
- sign&=1;
-#else
- if (val < -l) {
- val += 2*l;
- } else if (val >= l) {
- val -= 2*l;
- }
-
- assert(val>=-l && val<l);
-
- if (val >= 0) {
- sign = 0;
- } else {
- val = -val;
- sign = 1;
- }
-#endif
- val--;
- code = (val >> bit_size) + 1;
- bits = val & (range - 1);
-
- put_bits(&s->pb, mvtab[code][1] + 1, (mvtab[code][0] << 1) | sign);
- if (bit_size > 0) {
- put_bits(&s->pb, bit_size, bits);
- }
- }
-
-}
-
-/* Encode MV differences on H.263+ with Unrestricted MV mode */
-static void h263p_encode_umotion(MpegEncContext * s, int val)
-{
- short sval = 0;
- short i = 0;
- short n_bits = 0;
- short temp_val;
- int code = 0;
- int tcode;
-
- if ( val == 0)
- put_bits(&s->pb, 1, 1);
- else if (val == 1)
- put_bits(&s->pb, 3, 0);
- else if (val == -1)
- put_bits(&s->pb, 3, 2);
- else {
-
- sval = ((val < 0) ? (short)(-val):(short)val);
- temp_val = sval;
-
- while (temp_val != 0) {
- temp_val = temp_val >> 1;
- n_bits++;
- }
-
- i = n_bits - 1;
- while (i > 0) {
- tcode = (sval & (1 << (i-1))) >> (i-1);
- tcode = (tcode << 1) | 1;
- code = (code << 2) | tcode;
- i--;
- }
- code = ((code << 1) | (val < 0)) << 1;
- put_bits(&s->pb, (2*n_bits)+1, code);
- //printf("\nVal = %d\tCode = %d", sval, code);
- }
-}
-
-static void init_mv_penalty_and_fcode(MpegEncContext *s)
-{
- int f_code;
- int mv;
-
- if(mv_penalty==NULL)
- mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) );
-
- for(f_code=1; f_code<=MAX_FCODE; f_code++){
- for(mv=-MAX_MV; mv<=MAX_MV; mv++){
- int len;
-
- if(mv==0) len= mvtab[0][1];
- else{
- int val, bit_size, range, code;
-
- bit_size = s->f_code - 1;
- range = 1 << bit_size;
-
- val=mv;
- if (val < 0)
- val = -val;
- val--;
- code = (val >> bit_size) + 1;
- if(code<33){
- len= mvtab[code][1] + 1 + bit_size;
- }else{
- len= mvtab[32][1] + 2 + bit_size;
- }
- }
-
- mv_penalty[f_code][mv+MAX_MV]= len;
- }
- }
-
- for(f_code=MAX_FCODE; f_code>0; f_code--){
- for(mv=-(16<<f_code); mv<(16<<f_code); mv++){
- fcode_tab[mv+MAX_MV]= f_code;
- }
- }
-
- for(mv=0; mv<MAX_MV*2+1; mv++){
- umv_fcode_tab[mv]= 1;
- }
-}
-#endif
-
-#ifdef CONFIG_ENCODERS
-
-static void init_uni_dc_tab(void)
-{
- int level, uni_code, uni_len;
-
- for(level=-256; level<256; level++){
- int size, v, l;
- /* find number of bits */
- size = 0;
- v = abs(level);
- while (v) {
- v >>= 1;
- size++;
- }
-
- if (level < 0)
- l= (-level) ^ ((1 << size) - 1);
- else
- l= level;
-
- /* luminance */
- uni_code= DCtab_lum[size][0];
- uni_len = DCtab_lum[size][1];
-
- if (size > 0) {
- uni_code<<=size; uni_code|=l;
- uni_len+=size;
- if (size > 8){
- uni_code<<=1; uni_code|=1;
- uni_len++;
- }
- }
- uni_DCtab_lum_bits[level+256]= uni_code;
- uni_DCtab_lum_len [level+256]= uni_len;
-
- /* chrominance */
- uni_code= DCtab_chrom[size][0];
- uni_len = DCtab_chrom[size][1];
-
- if (size > 0) {
- uni_code<<=size; uni_code|=l;
- uni_len+=size;
- if (size > 8){
- uni_code<<=1; uni_code|=1;
- uni_len++;
- }
- }
- uni_DCtab_chrom_bits[level+256]= uni_code;
- uni_DCtab_chrom_len [level+256]= uni_len;
-
- }
-}
-
-#endif //CONFIG_ENCODERS
-
-#ifdef CONFIG_ENCODERS
-static void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){
- int slevel, run, last;
-
- assert(MAX_LEVEL >= 64);
- assert(MAX_RUN >= 63);
-
- for(slevel=-64; slevel<64; slevel++){
- if(slevel==0) continue;
- for(run=0; run<64; run++){
- for(last=0; last<=1; last++){
- const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
- int level= slevel < 0 ? -slevel : slevel;
- int sign= slevel < 0 ? 1 : 0;
- int bits, len, code;
- int level1, run1;
-
- len_tab[index]= 100;
-
- /* ESC0 */
- code= get_rl_index(rl, last, run, level);
- bits= rl->table_vlc[code][0];
- len= rl->table_vlc[code][1];
- bits=bits*2+sign; len++;
-
- if(code!=rl->n && len < len_tab[index]){
- bits_tab[index]= bits;
- len_tab [index]= len;
- }
-#if 1
- /* ESC1 */
- bits= rl->table_vlc[rl->n][0];
- len= rl->table_vlc[rl->n][1];
- bits=bits*2; len++; //esc1
- level1= level - rl->max_level[last][run];
- if(level1>0){
- code= get_rl_index(rl, last, run, level1);
- bits<<= rl->table_vlc[code][1];
- len += rl->table_vlc[code][1];
- bits += rl->table_vlc[code][0];
- bits=bits*2+sign; len++;
-
- if(code!=rl->n && len < len_tab[index]){
- bits_tab[index]= bits;
- len_tab [index]= len;
- }
- }
-#endif
-#if 1
- /* ESC2 */
- bits= rl->table_vlc[rl->n][0];
- len= rl->table_vlc[rl->n][1];
- bits=bits*4+2; len+=2; //esc2
- run1 = run - rl->max_run[last][level] - 1;
- if(run1>=0){
- code= get_rl_index(rl, last, run1, level);
- bits<<= rl->table_vlc[code][1];
- len += rl->table_vlc[code][1];
- bits += rl->table_vlc[code][0];
- bits=bits*2+sign; len++;
-
- if(code!=rl->n && len < len_tab[index]){
- bits_tab[index]= bits;
- len_tab [index]= len;
- }
- }
-#endif
- /* ESC3 */
- bits= rl->table_vlc[rl->n][0];
- len = rl->table_vlc[rl->n][1];
- bits=bits*4+3; len+=2; //esc3
- bits=bits*2+last; len++;
- bits=bits*64+run; len+=6;
- bits=bits*2+1; len++; //marker
- bits=bits*4096+(slevel&0xfff); len+=12;
- bits=bits*2+1; len++; //marker
-
- if(len < len_tab[index]){
- bits_tab[index]= bits;
- len_tab [index]= len;
- }
- }
- }
- }
-}
-
-void h263_encode_init(MpegEncContext *s)
-{
- static int done = 0;
-
- if (!done) {
- done = 1;
-
- init_uni_dc_tab();
-
- init_rl(&rl_inter);
- init_rl(&rl_intra);
- init_rl(&rl_intra_aic);
-
- init_uni_mpeg4_rl_tab(&rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
- init_uni_mpeg4_rl_tab(&rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
-
- init_mv_penalty_and_fcode(s);
- }
- s->me.mv_penalty= mv_penalty; //FIXME exact table for msmpeg4 & h263p
-
- // use fcodes >1 only for mpeg4 & h263 & h263p FIXME
- switch(s->codec_id){
- case CODEC_ID_MPEG4:
- s->fcode_tab= fcode_tab;
- s->min_qcoeff= -2048;
- s->max_qcoeff= 2047;
- s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len;
- s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64;
- s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len;
- s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64;
- s->luma_dc_vlc_length= uni_DCtab_lum_len;
- s->chroma_dc_vlc_length= uni_DCtab_chrom_len;
- s->ac_esc_length= 7+2+1+6+1+12+1;
-
- if(s->flags & CODEC_FLAG_GLOBAL_HEADER){
-
- s->avctx->extradata= av_malloc(1024);
- init_put_bits(&s->pb, s->avctx->extradata, 1024, NULL, NULL);
-
- mpeg4_encode_visual_object_header(s);
- mpeg4_encode_vol_header(s, 0, 0);
-
-// ff_mpeg4_stuffing(&s->pb); ?
- flush_put_bits(&s->pb);
- s->avctx->extradata_size= (get_bit_count(&s->pb)+7)>>3;
- }
-
- break;
- case CODEC_ID_H263P:
- s->fcode_tab= umv_fcode_tab;
- s->min_qcoeff= -127;
- s->max_qcoeff= 127;
- break;
- //Note for mpeg4 & h263 the dc-scale table will be set per frame as needed later
- case CODEC_ID_FLV1:
- if (s->h263_flv > 1) {
- s->min_qcoeff= -1023;
- s->max_qcoeff= 1023;
- } else {
- s->min_qcoeff= -127;
- s->max_qcoeff= 127;
- }
- s->y_dc_scale_table=
- s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
- break;
- default: //nothing needed default table allready set in mpegvideo.c
- s->min_qcoeff= -127;
- s->max_qcoeff= 127;
- s->y_dc_scale_table=
- s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
- }
-}
-
-/**
- * encodes a 8x8 block.
- * @param block the 8x8 block
- * @param n block index (0-3 are luma, 4-5 are chroma)
- */
-static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n)
-{
- int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code;
- RLTable *rl;
-
- rl = &rl_inter;
- if (s->mb_intra && !s->h263_aic) {
- /* DC coef */
- level = block[0];
- /* 255 cannot be represented, so we clamp */
- if (level > 254) {
- level = 254;
- block[0] = 254;
- }
- /* 0 cannot be represented also */
- else if (level < 1) {
- level = 1;
- block[0] = 1;
- }
- if (level == 128) //FIXME check rv10
- put_bits(&s->pb, 8, 0xff);
- else
- put_bits(&s->pb, 8, level & 0xff);
- i = 1;
- } else {
- i = 0;
- if (s->h263_aic && s->mb_intra)
- rl = &rl_intra_aic;
- }
-
- /* AC coefs */
- last_index = s->block_last_index[n];
- last_non_zero = i - 1;
- for (; i <= last_index; i++) {
- j = s->intra_scantable.permutated[i];
- level = block[j];
- if (level) {
- run = i - last_non_zero - 1;
- last = (i == last_index);
- sign = 0;
- slevel = level;
- if (level < 0) {
- sign = 1;
- level = -level;
- }
- code = get_rl_index(rl, last, run, level);
- put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
- if (code == rl->n) {
- if(s->h263_flv <= 1){
- put_bits(&s->pb, 1, last);
- put_bits(&s->pb, 6, run);
-
- assert(slevel != 0);
-
- if(slevel < 128 && slevel > -128)
- put_bits(&s->pb, 8, slevel & 0xff);
- else{
- put_bits(&s->pb, 8, 128);
- put_bits(&s->pb, 5, slevel & 0x1f);
- put_bits(&s->pb, 6, (slevel>>5)&0x3f);
- }
- }else{
- if(slevel < 64 && slevel > -64) {
- /* 7-bit level */
- put_bits(&s->pb, 1, 0);
- put_bits(&s->pb, 1, last);
- put_bits(&s->pb, 6, run);
-
- put_bits(&s->pb, 7, slevel & 0x7f);
- } else {
- /* 11-bit level */
- put_bits(&s->pb, 1, 1);
- put_bits(&s->pb, 1, last);
- put_bits(&s->pb, 6, run);
-
- put_bits(&s->pb, 11, slevel & 0x7ff);
- }
- }
- } else {
- put_bits(&s->pb, 1, sign);
- }
- last_non_zero = i;
- }
- }
-}
-#endif
-
-#ifdef CONFIG_ENCODERS
-
-/***************************************************/
-/**
- * add mpeg4 stuffing bits (01...1)
- */
-void ff_mpeg4_stuffing(PutBitContext * pbc)
-{
- int length;
- put_bits(pbc, 1, 0);
- length= (-get_bit_count(pbc))&7;
- if(length) put_bits(pbc, length, (1<<length)-1);
-}
-
-/* must be called before writing the header */
-void ff_set_mpeg4_time(MpegEncContext * s, int picture_number){
- int time_div, time_mod;
-
- if(s->current_picture.pts)
- s->time= (s->current_picture.pts*s->time_increment_resolution + 500*1000)/(1000*1000);
- else
- s->time= av_rescale(picture_number*(int64_t)s->avctx->frame_rate_base, s->time_increment_resolution, s->avctx->frame_rate);
- time_div= s->time/s->time_increment_resolution;
- time_mod= s->time%s->time_increment_resolution;
-
- if(s->pict_type==B_TYPE){
- s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
- }else{
- s->last_time_base= s->time_base;
- s->time_base= time_div;
- s->pp_time= s->time - s->last_non_b_time;
- s->last_non_b_time= s->time;
- }
-}
-
-static void mpeg4_encode_gop_header(MpegEncContext * s){
- int hours, minutes, seconds;
-
- put_bits(&s->pb, 16, 0);
- put_bits(&s->pb, 16, GOP_STARTCODE);
-
- seconds= s->time/s->time_increment_resolution;
- minutes= seconds/60; seconds %= 60;
- hours= minutes/60; minutes %= 60;
- hours%=24;
-
- put_bits(&s->pb, 5, hours);
- put_bits(&s->pb, 6, minutes);
- put_bits(&s->pb, 1, 1);
- put_bits(&s->pb, 6, seconds);
-
- put_bits(&s->pb, 1, 0); //closed gov == NO
- put_bits(&s->pb, 1, 0); //broken link == NO
-
- ff_mpeg4_stuffing(&s->pb);
-}
-
-static void mpeg4_encode_visual_object_header(MpegEncContext * s){
- int profile_and_level_indication;
- int vo_ver_id;
-
- if(s->max_b_frames || s->quarter_sample){
- profile_and_level_indication= 0xF1; // adv simple level 1
- vo_ver_id= 5;
- }else{
- profile_and_level_indication= 0x01; // simple level 1
- vo_ver_id= 1;
- }
- //FIXME levels
-
- put_bits(&s->pb, 16, 0);
- put_bits(&s->pb, 16, VOS_STARTCODE);
-
- put_bits(&s->pb, 8, profile_and_level_indication);
-
- put_bits(&s->pb, 16, 0);
- put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
-
- put_bits(&s->pb, 1, 1);
- put_bits(&s->pb, 4, vo_ver_id);
- put_bits(&s->pb, 3, 1); //priority
-
- put_bits(&s->pb, 4, 1); //visual obj type== video obj
-
- put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME
-
- ff_mpeg4_stuffing(&s->pb);
-}
-
-static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number)
-{
- int vo_ver_id;
-
- if(s->max_b_frames || s->quarter_sample){
- vo_ver_id= 5;
- s->vo_type= ADV_SIMPLE_VO_TYPE;
- }else{
- vo_ver_id= 1;
- s->vo_type= SIMPLE_VO_TYPE;
- }
-
- put_bits(&s->pb, 16, 0);
- put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
- put_bits(&s->pb, 16, 0);
- put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
-
- put_bits(&s->pb, 1, 0); /* random access vol */
- put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
- put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
- put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
- put_bits(&s->pb, 3, 1); /* is obj layer priority */
-
- float_aspect_to_info(s, s->avctx->aspect_ratio);
-
- put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
- if (s->aspect_ratio_info == FF_ASPECT_EXTENDED)
- {
- put_bits(&s->pb, 8, s->aspected_width);
- put_bits(&s->pb, 8, s->aspected_height);
- }
-
- if(s->low_delay){
- put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
- put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
- put_bits(&s->pb, 1, s->low_delay);
- put_bits(&s->pb, 1, 0); /* vbv parameters= no */
- }else{
- put_bits(&s->pb, 1, 0); /* vol control parameters= no */
- }
-
- put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
- put_bits(&s->pb, 1, 1); /* marker bit */
-
- put_bits(&s->pb, 16, s->time_increment_resolution);
- if (s->time_increment_bits < 1)
- s->time_increment_bits = 1;
- put_bits(&s->pb, 1, 1); /* marker bit */
- put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
- put_bits(&s->pb, 1, 1); /* marker bit */
- put_bits(&s->pb, 13, s->width); /* vol width */
- put_bits(&s->pb, 1, 1); /* marker bit */
- put_bits(&s->pb, 13, s->height); /* vol height */
- put_bits(&s->pb, 1, 1); /* marker bit */
- put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
- put_bits(&s->pb, 1, 1); /* obmc disable */
- if (vo_ver_id == 1) {
- put_bits(&s->pb, 1, s->vol_sprite_usage=0); /* sprite enable */
- }else{
- put_bits(&s->pb, 2, s->vol_sprite_usage=0); /* sprite enable */
- }
-
- s->quant_precision=5;
- put_bits(&s->pb, 1, 0); /* not 8 bit == false */
- put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
-
- if(s->mpeg_quant){
- ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
- ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
- }
-
- if (vo_ver_id != 1)
- put_bits(&s->pb, 1, s->quarter_sample);
- put_bits(&s->pb, 1, 1); /* complexity estimation disable */
- s->resync_marker= s->rtp_mode;
- put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */
- put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
- if(s->data_partitioning){
- put_bits(&s->pb, 1, 0); /* no rvlc */
- }
-
- if (vo_ver_id != 1){
- put_bits(&s->pb, 1, 0); /* newpred */
- put_bits(&s->pb, 1, 0); /* reduced res vop */
- }
- put_bits(&s->pb, 1, 0); /* scalability */
-
- ff_mpeg4_stuffing(&s->pb);
-
- /* user data */
- if(!(s->flags & CODEC_FLAG_BITEXACT)){
- put_bits(&s->pb, 16, 0);
- put_bits(&s->pb, 16, 0x1B2); /* user_data */
- put_string(&s->pb, LIBAVCODEC_IDENT);
- ff_mpeg4_stuffing(&s->pb);
- }
-}
-
-/* write mpeg4 VOP header */
-void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
-{
- int time_incr;
- int time_div, time_mod;
-
- if(s->pict_type==I_TYPE){
- if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){
- if(s->strict_std_compliance < 2) //HACK, the reference sw is buggy
- mpeg4_encode_visual_object_header(s);
- if(s->strict_std_compliance < 2 || picture_number==0) //HACK, the reference sw is buggy
- mpeg4_encode_vol_header(s, 0, 0);
- }
- mpeg4_encode_gop_header(s);
- }
-
- s->partitioned_frame= s->data_partitioning && s->pict_type!=B_TYPE;
-
-//printf("num:%d rate:%d base:%d\n", s->picture_number, s->frame_rate, FRAME_RATE_BASE);
-
- put_bits(&s->pb, 16, 0); /* vop header */
- put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
- put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
-
- time_div= s->time/s->time_increment_resolution;
- time_mod= s->time%s->time_increment_resolution;
- time_incr= time_div - s->last_time_base;
- while(time_incr--)
- put_bits(&s->pb, 1, 1);
-
- put_bits(&s->pb, 1, 0);
-
- put_bits(&s->pb, 1, 1); /* marker */
- put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
- put_bits(&s->pb, 1, 1); /* marker */
- put_bits(&s->pb, 1, 1); /* vop coded */
- if ( s->pict_type == P_TYPE
- || (s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE)) {
- put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
- }
- put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
- if(!s->progressive_sequence){
- put_bits(&s->pb, 1, s->top_field_first);
- put_bits(&s->pb, 1, s->alternate_scan);
- }
- //FIXME sprite stuff
-
- put_bits(&s->pb, 5, s->qscale);
-
- if (s->pict_type != I_TYPE)
- put_bits(&s->pb, 3, s->f_code); /* fcode_for */
- if (s->pict_type == B_TYPE)
- put_bits(&s->pb, 3, s->b_code); /* fcode_back */
- // printf("****frame %d\n", picture_number);
-
- s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; //FIXME add short header support
- s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
-}
-
-#endif //CONFIG_ENCODERS
-
-/**
- * change qscale by given dquant and update qscale dependant variables.
- */
-static void change_qscale(MpegEncContext * s, int dquant)
-{
- s->qscale += dquant;
-
- if (s->qscale < 1)
- s->qscale = 1;
- else if (s->qscale > 31)
- s->qscale = 31;
-
- s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
- s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
-}
-
-/**
- * predicts the dc.
- * @param n block index (0-3 are luma, 4-5 are chroma)
- * @param dc_val_ptr a pointer to the dc_val entry for the current MB will be stored here
- * @param dir_ptr pointer to an integer where the prediction direction will be stored
- * @return the quantized predicted dc
- */
-static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, uint16_t **dc_val_ptr, int *dir_ptr)
-{
- int a, b, c, wrap, pred, scale;
- uint16_t *dc_val;
-
- /* find prediction */
- if (n < 4) {
- scale = s->y_dc_scale;
- } else {
- scale = s->c_dc_scale;
- }
- if(IS_3IV1)
- scale= 8;
-
- wrap= s->block_wrap[n];
- dc_val = s->dc_val[0] + s->block_index[n];
-
- /* B C
- * A X
- */
- a = dc_val[ - 1];
- b = dc_val[ - 1 - wrap];
- c = dc_val[ - wrap];
-
- /* outside slice handling (we cant do that by memset as we need the dc for error resilience) */
- if(s->first_slice_line && n!=3){
- if(n!=2) b=c= 1024;
- if(n!=1 && s->mb_x == s->resync_mb_x) b=a= 1024;
- }
- if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1){
- if(n==0 || n==4 || n==5)
- b=1024;
- }
-
- if (abs(a - b) < abs(b - c)) {
- pred = c;
- *dir_ptr = 1; /* top */
- } else {
- pred = a;
- *dir_ptr = 0; /* left */
- }
- /* we assume pred is positive */
- pred = FASTDIV((pred + (scale >> 1)), scale);
-
- /* prepare address for prediction update */
- *dc_val_ptr = &dc_val[0];
-
- return pred;
-}
-
-/**
- * predicts the ac.
- * @param n block index (0-3 are luma, 4-5 are chroma)
- * @param dir the ac prediction direction
- */
-void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
- int dir)
-{
- int i;
- int16_t *ac_val, *ac_val1;
- int8_t * const qscale_table= s->current_picture.qscale_table;
-
- /* find prediction */
- ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
- ac_val1 = ac_val;
- if (s->ac_pred) {
- if (dir == 0) {
- const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
- /* left prediction */
- ac_val -= 16;
-
- if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
- /* same qscale */
- for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i<<3]] += ac_val[i];
- }
- }else{
- /* different qscale, we must rescale */
- for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i<<3]] += ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale);
- }
- }
- } else {
- const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
- /* top prediction */
- ac_val -= 16 * s->block_wrap[n];
-
- if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
- /* same qscale */
- for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i]] += ac_val[i + 8];
- }
- }else{
- /* different qscale, we must rescale */
- for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale);
- }
- }
- }
- }
- /* left copy */
- for(i=1;i<8;i++)
- ac_val1[i ] = block[s->dsp.idct_permutation[i<<3]];
-
- /* top copy */
- for(i=1;i<8;i++)
- ac_val1[8 + i] = block[s->dsp.idct_permutation[i ]];
-
-}
-
-#ifdef CONFIG_ENCODERS
-
-static void mpeg4_inv_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
- int dir)
-{
- int i;
- int16_t *ac_val;
- int8_t * const qscale_table= s->current_picture.qscale_table;
-
- /* find prediction */
- ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
-
- if (dir == 0) {
- const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
- /* left prediction */
- ac_val -= 16;
- if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
- /* same qscale */
- for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i<<3]] -= ac_val[i];
- }
- }else{
- /* different qscale, we must rescale */
- for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i<<3]] -= ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale);
- }
- }
- } else {
- const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
- /* top prediction */
- ac_val -= 16 * s->block_wrap[n];
- if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
- /* same qscale */
- for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i]] -= ac_val[i + 8];
- }
- }else{
- /* different qscale, we must rescale */
- for(i=1;i<8;i++) {
- block[s->dsp.idct_permutation[i]] -= ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale);
- }
- }
- }
-}
-
-/**
- * encodes the dc value.
- * @param n block index (0-3 are luma, 4-5 are chroma)
- */
-static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
-{
-#if 1
-// if(level<-255 || level>255) printf("dc overflow\n");
- level+=256;
- if (n < 4) {
- /* luminance */
- put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
- } else {
- /* chrominance */
- put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]);
- }
-#else
- int size, v;
- /* find number of bits */
- size = 0;
- v = abs(level);
- while (v) {
- v >>= 1;
- size++;
- }
-
- if (n < 4) {
- /* luminance */
- put_bits(&s->pb, DCtab_lum[size][1], DCtab_lum[size][0]);
- } else {
- /* chrominance */
- put_bits(&s->pb, DCtab_chrom[size][1], DCtab_chrom[size][0]);
- }
-
- /* encode remaining bits */
- if (size > 0) {
- if (level < 0)
- level = (-level) ^ ((1 << size) - 1);
- put_bits(&s->pb, size, level);
- if (size > 8)
- put_bits(&s->pb, 1, 1);
- }
-#endif
-}
-
-/**
- * encodes a 8x8 block
- * @param n block index (0-3 are luma, 4-5 are chroma)
- */
-static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
- uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
-{
- int i, last_non_zero;
-#if 0 //variables for the outcommented version
- int code, sign, last;
-#endif
- const RLTable *rl;
- uint32_t *bits_tab;
- uint8_t *len_tab;
- const int last_index = s->block_last_index[n];
-
- if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
- /* mpeg4 based DC predictor */
- mpeg4_encode_dc(dc_pb, intra_dc, n);
- if(last_index<1) return;
- i = 1;
- rl = &rl_intra;
- bits_tab= uni_mpeg4_intra_rl_bits;
- len_tab = uni_mpeg4_intra_rl_len;
- } else {
- if(last_index<0) return;
- i = 0;
- rl = &rl_inter;
- bits_tab= uni_mpeg4_inter_rl_bits;
- len_tab = uni_mpeg4_inter_rl_len;
- }
-
- /* AC coefs */
- last_non_zero = i - 1;
-#if 1
- for (; i < last_index; i++) {
- int level = block[ scan_table[i] ];
- if (level) {
- int run = i - last_non_zero - 1;
- level+=64;
- if((level&(~127)) == 0){
- const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
- put_bits(ac_pb, len_tab[index], bits_tab[index]);
- }else{ //ESC3
- put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(0<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
- }
- last_non_zero = i;
- }
- }
- /*if(i<=last_index)*/{
- int level = block[ scan_table[i] ];
- int run = i - last_non_zero - 1;
- level+=64;
- if((level&(~127)) == 0){
- const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
- put_bits(ac_pb, len_tab[index], bits_tab[index]);
- }else{ //ESC3
- put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(1<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
- }
- }
-#else
- for (; i <= last_index; i++) {
- const int slevel = block[ scan_table[i] ];
- if (slevel) {
- int level;
- int run = i - last_non_zero - 1;
- last = (i == last_index);
- sign = 0;
- level = slevel;
- if (level < 0) {
- sign = 1;
- level = -level;
- }
- code = get_rl_index(rl, last, run, level);
- put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
- if (code == rl->n) {
- int level1, run1;
- level1 = level - rl->max_level[last][run];
- if (level1 < 1)
- goto esc2;
- code = get_rl_index(rl, last, run, level1);
- if (code == rl->n) {
- esc2:
- put_bits(ac_pb, 1, 1);
- if (level > MAX_LEVEL)
- goto esc3;
- run1 = run - rl->max_run[last][level] - 1;
- if (run1 < 0)
- goto esc3;
- code = get_rl_index(rl, last, run1, level);
- if (code == rl->n) {
- esc3:
- /* third escape */
- put_bits(ac_pb, 1, 1);
- put_bits(ac_pb, 1, last);
- put_bits(ac_pb, 6, run);
- put_bits(ac_pb, 1, 1);
- put_bits(ac_pb, 12, slevel & 0xfff);
- put_bits(ac_pb, 1, 1);
- } else {
- /* second escape */
- put_bits(ac_pb, 1, 0);
- put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
- put_bits(ac_pb, 1, sign);
- }
- } else {
- /* first escape */
- put_bits(ac_pb, 1, 0);
- put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
- put_bits(ac_pb, 1, sign);
- }
- } else {
- put_bits(ac_pb, 1, sign);
- }
- last_non_zero = i;
- }
- }
-#endif
-}
-
-static inline int mpeg4_get_block_length(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
- uint8_t *scan_table)
-{
- int i, last_non_zero;
- const RLTable *rl;
- uint8_t *len_tab;
- const int last_index = s->block_last_index[n];
- int len=0;
-
- if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
- /* mpeg4 based DC predictor */
- //mpeg4_encode_dc(dc_pb, intra_dc, n); //FIXME
- if(last_index<1) return len;
- i = 1;
- rl = &rl_intra;
- len_tab = uni_mpeg4_intra_rl_len;
- } else {
- if(last_index<0) return 0;
- i = 0;
- rl = &rl_inter;
- len_tab = uni_mpeg4_inter_rl_len;
- }
-
- /* AC coefs */
- last_non_zero = i - 1;
- for (; i < last_index; i++) {
- int level = block[ scan_table[i] ];
- if (level) {
- int run = i - last_non_zero - 1;
- level+=64;
- if((level&(~127)) == 0){
- const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
- len += len_tab[index];
- }else{ //ESC3
- len += 7+2+1+6+1+12+1;
- }
- last_non_zero = i;
- }
- }
- /*if(i<=last_index)*/{
- int level = block[ scan_table[i] ];
- int run = i - last_non_zero - 1;
- level+=64;
- if((level&(~127)) == 0){
- const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
- len += len_tab[index];
- }else{ //ESC3
- len += 7+2+1+6+1+12+1;
- }
- }
-
- return len;
-}
-
-#endif
-
-
-/***********************************************/
-/* decoding */
-
-static VLC intra_MCBPC_vlc;
-static VLC inter_MCBPC_vlc;
-static VLC cbpy_vlc;
-static VLC mv_vlc;
-static VLC dc_lum, dc_chrom;
-static VLC sprite_trajectory;
-static VLC mb_type_b_vlc;
-
-void init_vlc_rl(RLTable *rl)
-{
- int i, q;
-
- init_vlc(&rl->vlc, 9, rl->n + 1,
- &rl->table_vlc[0][1], 4, 2,
- &rl->table_vlc[0][0], 4, 2);
-
-
- for(q=0; q<32; q++){
- int qmul= q*2;
- int qadd= (q-1)|1;
-
- if(q==0){
- qmul=1;
- qadd=0;
- }
-
- rl->rl_vlc[q]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
- for(i=0; i<rl->vlc.table_size; i++){
- int code= rl->vlc.table[i][0];
- int len = rl->vlc.table[i][1];
- int level, run;
-
- if(len==0){ // illegal code
- run= 66;
- level= MAX_LEVEL;
- }else if(len<0){ //more bits needed
- run= 0;
- level= code;
- }else{
- if(code==rl->n){ //esc
- run= 66;
- level= 0;
- }else{
- run= rl->table_run [code] + 1;
- level= rl->table_level[code] * qmul + qadd;
- if(code >= rl->last) run+=192;
- }
- }
- rl->rl_vlc[q][i].len= len;
- rl->rl_vlc[q][i].level= level;
- rl->rl_vlc[q][i].run= run;
- }
- }
-}
-
-/* init vlcs */
-
-/* XXX: find a better solution to handle static init */
-void h263_decode_init_vlc(MpegEncContext *s)
-{
- static int done = 0;
-
- if (!done) {
- done = 1;
-
- init_vlc(&intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 9,
- intra_MCBPC_bits, 1, 1,
- intra_MCBPC_code, 1, 1);
- init_vlc(&inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 28,
- inter_MCBPC_bits, 1, 1,
- inter_MCBPC_code, 1, 1);
- init_vlc(&cbpy_vlc, CBPY_VLC_BITS, 16,
- &cbpy_tab[0][1], 2, 1,
- &cbpy_tab[0][0], 2, 1);
- init_vlc(&mv_vlc, MV_VLC_BITS, 33,
- &mvtab[0][1], 2, 1,
- &mvtab[0][0], 2, 1);
- init_rl(&rl_inter);
- init_rl(&rl_intra);
- init_rl(&rvlc_rl_inter);
- init_rl(&rvlc_rl_intra);
- init_rl(&rl_intra_aic);
- init_vlc_rl(&rl_inter);
- init_vlc_rl(&rl_intra);
- init_vlc_rl(&rvlc_rl_inter);
- init_vlc_rl(&rvlc_rl_intra);
- init_vlc_rl(&rl_intra_aic);
- init_vlc(&dc_lum, DC_VLC_BITS, 10 /* 13 */,
- &DCtab_lum[0][1], 2, 1,
- &DCtab_lum[0][0], 2, 1);
- init_vlc(&dc_chrom, DC_VLC_BITS, 10 /* 13 */,
- &DCtab_chrom[0][1], 2, 1,
- &DCtab_chrom[0][0], 2, 1);
- init_vlc(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15,
- &sprite_trajectory_tab[0][1], 4, 2,
- &sprite_trajectory_tab[0][0], 4, 2);
- init_vlc(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4,
- &mb_type_b_tab[0][1], 2, 1,
- &mb_type_b_tab[0][0], 2, 1);
- }
-}
-
-/**
- * Get the GOB height based on picture height.
- */
-int ff_h263_get_gob_height(MpegEncContext *s){
- if (s->height <= 400)
- return 1;
- else if (s->height <= 800)
- return 2;
- else
- return 4;
-}
-
-/**
- * decodes the group of blocks header.
- * @return <0 if an error occured
- */
-static int h263_decode_gob_header(MpegEncContext *s)
-{
- unsigned int val, gfid;
- int left;
-
- /* Check for GOB Start Code */
- val = show_bits(&s->gb, 16);
- if(val)
- return -1;
-
- /* We have a GBSC probably with GSTUFF */
- skip_bits(&s->gb, 16); /* Drop the zeros */
- left= s->gb.size_in_bits - get_bits_count(&s->gb);
- //MN: we must check the bits left or we might end in a infinite loop (or segfault)
- for(;left>13; left--){
- if(get_bits1(&s->gb)) break; /* Seek the '1' bit */
- }
- if(left<=13)
- return -1;
-
-#ifdef DEBUG
- fprintf(stderr,"\nGOB Start Code at MB %d\n", (s->mb_y * s->mb_width) + s->mb_x);
-#endif
- s->gob_number = get_bits(&s->gb, 5); /* GN */
- gfid = get_bits(&s->gb, 2); /* GFID */
- s->qscale = get_bits(&s->gb, 5); /* GQUANT */
- if(s->qscale==0)
- return -1;
- s->mb_x= 0;
- s->mb_y= s->gob_index* s->gob_number;
- if(s->mb_y >= s->mb_height)
- return -1;
-#ifdef DEBUG
- fprintf(stderr, "\nGN: %u GFID: %u Quant: %u\n", s->gob_number, gfid, s->qscale);
-#endif
- return 0;
-}
-
-static inline void memsetw(short *tab, int val, int n)
-{
- int i;
- for(i=0;i<n;i++)
- tab[i] = val;
-}
-
-#ifdef CONFIG_ENCODERS
-
-void ff_mpeg4_init_partitions(MpegEncContext *s)
-{
- init_put_bits(&s->tex_pb, s->tex_pb_buffer, PB_BUFFER_SIZE, NULL, NULL);
- init_put_bits(&s->pb2 , s->pb2_buffer , PB_BUFFER_SIZE, NULL, NULL);
-}
-
-void ff_mpeg4_merge_partitions(MpegEncContext *s)
-{
- const int pb2_len = get_bit_count(&s->pb2 );
- const int tex_pb_len= get_bit_count(&s->tex_pb);
- const int bits= get_bit_count(&s->pb);
-
- if(s->pict_type==I_TYPE){
- put_bits(&s->pb, 19, DC_MARKER);
- s->misc_bits+=19 + pb2_len + bits - s->last_bits;
- s->i_tex_bits+= tex_pb_len;
- }else{
- put_bits(&s->pb, 17, MOTION_MARKER);
- s->misc_bits+=17 + pb2_len;
- s->mv_bits+= bits - s->last_bits;
- s->p_tex_bits+= tex_pb_len;
- }
-
- flush_put_bits(&s->pb2);
- flush_put_bits(&s->tex_pb);
-
- ff_copy_bits(&s->pb, s->pb2_buffer , pb2_len);
- ff_copy_bits(&s->pb, s->tex_pb_buffer, tex_pb_len);
- s->last_bits= get_bit_count(&s->pb);
-}
-
-#endif //CONFIG_ENCODERS
-
-int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s){
- switch(s->pict_type){
- case I_TYPE:
- return 16;
- case P_TYPE:
- case S_TYPE:
- return s->f_code+15;
- case B_TYPE:
- return FFMAX(FFMAX(s->f_code, s->b_code)+15, 17);
- default:
- return -1;
- }
-}
-
-#ifdef CONFIG_ENCODERS
-
-void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
-{
- int mb_num_bits= av_log2(s->mb_num - 1) + 1;
-
- ff_mpeg4_stuffing(&s->pb);
- put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0);
- put_bits(&s->pb, 1, 1);
-
- put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width);
- put_bits(&s->pb, s->quant_precision, s->qscale);
- put_bits(&s->pb, 1, 0); /* no HEC */
-}
-
-#endif //CONFIG_ENCODERS
-
-/**
- * check if the next stuff is a resync marker or the end.
- * @return 0 if not
- */
-static inline int mpeg4_is_resync(MpegEncContext *s){
- const int bits_count= get_bits_count(&s->gb);
-
- if(s->workaround_bugs&FF_BUG_NO_PADDING){
- return 0;
- }
-
- if(bits_count + 8 >= s->gb.size_in_bits){
- int v= show_bits(&s->gb, 8);
- v|= 0x7F >> (7-(bits_count&7));
-
- if(v==0x7F)
- return 1;
- }else{
- if(show_bits(&s->gb, 16) == ff_mpeg4_resync_prefix[bits_count&7]){
- int len;
- GetBitContext gb= s->gb;
-
- skip_bits(&s->gb, 1);
- align_get_bits(&s->gb);
-
- for(len=0; len<32; len++){
- if(get_bits1(&s->gb)) break;
- }
-
- s->gb= gb;
-
- if(len>=ff_mpeg4_get_video_packet_prefix_length(s))
- return 1;
- }
- }
- return 0;
-}
-
-/**
- * decodes the next video packet.
- * @return <0 if something went wrong
- */
-static int mpeg4_decode_video_packet_header(MpegEncContext *s)
-{
- int mb_num_bits= av_log2(s->mb_num - 1) + 1;
- int header_extension=0, mb_num, len;
-
- /* is there enough space left for a video packet + header */
- if( get_bits_count(&s->gb) > s->gb.size_in_bits-20) return -1;
-
- for(len=0; len<32; len++){
- if(get_bits1(&s->gb)) break;
- }
-
- if(len!=ff_mpeg4_get_video_packet_prefix_length(s)){
- printf("marker does not match f_code\n");
- return -1;
- }
-
- if(s->shape != RECT_SHAPE){
- header_extension= get_bits1(&s->gb);
- //FIXME more stuff here
- }
-
- mb_num= get_bits(&s->gb, mb_num_bits);
- if(mb_num>=s->mb_num){
- fprintf(stderr, "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num);
- return -1;
- }
- if(s->pict_type == B_TYPE){
- while(s->next_picture.mbskip_table[ s->mb_index2xy[ mb_num ] ]) mb_num++;
- if(mb_num >= s->mb_num) return -1; // slice contains just skiped MBs which where allready decoded
- }
-
- s->mb_x= mb_num % s->mb_width;
- s->mb_y= mb_num / s->mb_width;
-
- if(s->shape != BIN_ONLY_SHAPE){
- int qscale= get_bits(&s->gb, s->quant_precision);
- if(qscale)
- s->qscale= qscale;
- }
-
- if(s->shape == RECT_SHAPE){
- header_extension= get_bits1(&s->gb);
- }
- if(header_extension){
- int time_increment;
- int time_incr=0;
-
- while (get_bits1(&s->gb) != 0)
- time_incr++;
-
- check_marker(&s->gb, "before time_increment in video packed header");
- time_increment= get_bits(&s->gb, s->time_increment_bits);
- check_marker(&s->gb, "before vop_coding_type in video packed header");
-
- skip_bits(&s->gb, 2); /* vop coding type */
- //FIXME not rect stuff here
-
- if(s->shape != BIN_ONLY_SHAPE){
- skip_bits(&s->gb, 3); /* intra dc vlc threshold */
-//FIXME dont just ignore everything
- if(s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE){
- mpeg4_decode_sprite_trajectory(s);
- fprintf(stderr, "untested\n");
- }
-
- //FIXME reduced res stuff here
-
- if (s->pict_type != I_TYPE) {
- int f_code = get_bits(&s->gb, 3); /* fcode_for */
- if(f_code==0){
- printf("Error, video packet header damaged (f_code=0)\n");
- }
- }
- if (s->pict_type == B_TYPE) {
- int b_code = get_bits(&s->gb, 3);
- if(b_code==0){
- printf("Error, video packet header damaged (b_code=0)\n");
- }
- }
- }
- }
- //FIXME new-pred stuff
-
-//printf("parse ok %d %d %d %d\n", mb_num, s->mb_x + s->mb_y*s->mb_width, get_bits_count(gb), get_bits_count(&s->gb));
-
- return 0;
-}
-
-void ff_mpeg4_clean_buffers(MpegEncContext *s)
-{
- int c_wrap, c_xy, l_wrap, l_xy;
-
- l_wrap= s->block_wrap[0];
- l_xy= s->mb_y*l_wrap*2 + s->mb_x*2;
- c_wrap= s->block_wrap[4];
- c_xy= s->mb_y*c_wrap + s->mb_x;
-
-#if 0
- /* clean DC */
- memsetw(s->dc_val[0] + l_xy, 1024, l_wrap*2+1);
- memsetw(s->dc_val[1] + c_xy, 1024, c_wrap+1);
- memsetw(s->dc_val[2] + c_xy, 1024, c_wrap+1);
-#endif
-
- /* clean AC */
- memset(s->ac_val[0] + l_xy, 0, (l_wrap*2+1)*16*sizeof(int16_t));
- memset(s->ac_val[1] + c_xy, 0, (c_wrap +1)*16*sizeof(int16_t));
- memset(s->ac_val[2] + c_xy, 0, (c_wrap +1)*16*sizeof(int16_t));
-
- /* clean MV */
- // we cant clear the MVs as they might be needed by a b frame
-// memset(s->motion_val + l_xy, 0, (l_wrap*2+1)*2*sizeof(int16_t));
-// memset(s->motion_val, 0, 2*sizeof(int16_t)*(2 + s->mb_width*2)*(2 + s->mb_height*2));
- s->last_mv[0][0][0]=
- s->last_mv[0][0][1]=
- s->last_mv[1][0][0]=
- s->last_mv[1][0][1]= 0;
-}
-
-/**
- * decodes the group of blocks / video packet header.
- * @return <0 if no resync found
- */
-int ff_h263_resync(MpegEncContext *s){
- int left, ret;
-
- if(s->codec_id==CODEC_ID_MPEG4)
- skip_bits1(&s->gb);
-
- align_get_bits(&s->gb);
-
- if(show_bits(&s->gb, 16)==0){
- if(s->codec_id==CODEC_ID_MPEG4)
- ret= mpeg4_decode_video_packet_header(s);
- else
- ret= h263_decode_gob_header(s);
- if(ret>=0)
- return 0;
- }
- //ok, its not where its supposed to be ...
- s->gb= s->last_resync_gb;
- align_get_bits(&s->gb);
- left= s->gb.size_in_bits - get_bits_count(&s->gb);
-
- for(;left>16+1+5+5; left-=8){
- if(show_bits(&s->gb, 16)==0){
- GetBitContext bak= s->gb;
-
- if(s->codec_id==CODEC_ID_MPEG4)
- ret= mpeg4_decode_video_packet_header(s);
- else
- ret= h263_decode_gob_header(s);
- if(ret>=0)
- return 0;
-
- s->gb= bak;
- }
- skip_bits(&s->gb, 8);
- }
-
- return -1;
-}
-
-/**
- * gets the average motion vector for a GMC MB.
- * @param n either 0 for the x component or 1 for y
- * @returns the average MV for a GMC MB
- */
-static inline int get_amv(MpegEncContext *s, int n){
- int x, y, mb_v, sum, dx, dy, shift;
- int len = 1 << (s->f_code + 4);
- const int a= s->sprite_warping_accuracy;
-
- if(s->real_sprite_warping_points==1){
- if(s->divx_version==500 && s->divx_build==413)
- sum= s->sprite_offset[0][n] / (1<<(a - s->quarter_sample));
- else
- sum= RSHIFT(s->sprite_offset[0][n]<<s->quarter_sample, a);
- }else{
- dx= s->sprite_delta[n][0];
- dy= s->sprite_delta[n][1];
- shift= s->sprite_shift[0];
- if(n) dy -= 1<<(shift + a + 1);
- else dx -= 1<<(shift + a + 1);
- mb_v= s->sprite_offset[0][n] + dx*s->mb_x*16 + dy*s->mb_y*16;
-
- sum=0;
- for(y=0; y<16; y++){
- int v;
-
- v= mb_v + dy*y;
- //XXX FIXME optimize
- for(x=0; x<16; x++){
- sum+= v>>shift;
- v+= dx;
- }
- }
- sum= RSHIFT(sum, a+8-s->quarter_sample);
- }
-
- if (sum < -len) sum= -len;
- else if (sum >= len) sum= len-1;
-
- return sum;
-}
-
-/**
- * decodes first partition.
- * @return number of MBs decoded or <0 if an error occured
- */
-static int mpeg4_decode_partition_a(MpegEncContext *s){
- int mb_num;
- static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
-
- /* decode first partition */
- mb_num=0;
- s->first_slice_line=1;
- for(; s->mb_y<s->mb_height; s->mb_y++){
- ff_init_block_index(s);
- for(; s->mb_x<s->mb_width; s->mb_x++){
- const int xy= s->mb_x + s->mb_y*s->mb_stride;
- int cbpc;
- int dir=0;
-
- mb_num++;
- ff_update_block_index(s);
- if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1)
- s->first_slice_line=0;
-
- if(s->pict_type==I_TYPE){
- int i;
-
- if(show_bits_long(&s->gb, 19)==DC_MARKER){
- return mb_num-1;
- }
-
- do{
- cbpc = get_vlc2(&s->gb, intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
- if (cbpc < 0){
- fprintf(stderr, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- }while(cbpc == 8);
-
- s->cbp_table[xy]= cbpc & 3;
- s->current_picture.mb_type[xy]= MB_TYPE_INTRA;
- s->mb_intra = 1;
-
- if(cbpc & 4) {
- change_qscale(s, quant_tab[get_bits(&s->gb, 2)]);
- }
- s->current_picture.qscale_table[xy]= s->qscale;
-
- s->mbintra_table[xy]= 1;
- for(i=0; i<6; i++){
- int dc_pred_dir;
- int dc= mpeg4_decode_dc(s, i, &dc_pred_dir);
- if(dc < 0){
- fprintf(stderr, "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- dir<<=1;
- if(dc_pred_dir) dir|=1;
- }
- s->pred_dir_table[xy]= dir;
- }else{ /* P/S_TYPE */
- int mx, my, pred_x, pred_y, bits;
- int16_t * const mot_val= s->motion_val[s->block_index[0]];
- const int stride= s->block_wrap[0]*2;
-
-// do{ //FIXME
- bits= show_bits(&s->gb, 17);
- if(bits==MOTION_MARKER){
- return mb_num-1;
- }
- skip_bits1(&s->gb);
- if(bits&0x10000){
- /* skip mb */
- if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE){
- s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0;
- mx= get_amv(s, 0);
- my= get_amv(s, 1);
- }else{
- s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
- mx=my=0;
- }
- mot_val[0 ]= mot_val[2 ]=
- mot_val[0+stride]= mot_val[2+stride]= mx;
- mot_val[1 ]= mot_val[3 ]=
- mot_val[1+stride]= mot_val[3+stride]= my;
-
- if(s->mbintra_table[xy])
- ff_clean_intra_table_entries(s);
- continue;
- }
-
- cbpc = get_vlc2(&s->gb, inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
- if (cbpc < 0){
- fprintf(stderr, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-// }while(cbpc == 20);
-
- s->cbp_table[xy]= cbpc&(8+3); //8 is dquant
-
- s->mb_intra = ((cbpc & 4) != 0);
-
- if(s->mb_intra){
- s->current_picture.mb_type[xy]= MB_TYPE_INTRA;
- s->mbintra_table[xy]= 1;
- mot_val[0 ]= mot_val[2 ]=
- mot_val[0+stride]= mot_val[2+stride]= 0;
- mot_val[1 ]= mot_val[3 ]=
- mot_val[1+stride]= mot_val[3+stride]= 0;
- }else{
- if(s->mbintra_table[xy])
- ff_clean_intra_table_entries(s);
-
- if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0)
- s->mcsel= get_bits1(&s->gb);
- else s->mcsel= 0;
-
- if ((cbpc & 16) == 0) {
- /* 16x16 motion prediction */
-
- h263_pred_motion(s, 0, &pred_x, &pred_y);
- if(!s->mcsel){
- mx = h263_decode_motion(s, pred_x, s->f_code);
- if (mx >= 0xffff)
- return -1;
-
- my = h263_decode_motion(s, pred_y, s->f_code);
- if (my >= 0xffff)
- return -1;
- s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_L0;
- } else {
- mx = get_amv(s, 0);
- my = get_amv(s, 1);
- s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0;
- }
-
- mot_val[0 ]= mot_val[2 ] =
- mot_val[0+stride]= mot_val[2+stride]= mx;
- mot_val[1 ]= mot_val[3 ]=
- mot_val[1+stride]= mot_val[3+stride]= my;
- } else {
- int i;
- s->current_picture.mb_type[xy]= MB_TYPE_8x8 | MB_TYPE_L0;
- for(i=0;i<4;i++) {
- int16_t *mot_val= h263_pred_motion(s, i, &pred_x, &pred_y);
- mx = h263_decode_motion(s, pred_x, s->f_code);
- if (mx >= 0xffff)
- return -1;
-
- my = h263_decode_motion(s, pred_y, s->f_code);
- if (my >= 0xffff)
- return -1;
- mot_val[0] = mx;
- mot_val[1] = my;
- }
- }
- }
- }
- }
- s->mb_x= 0;
- }
-
- return mb_num;
-}
-
-/**
- * decode second partition.
- * @return <0 if an error occured
- */
-static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count){
- int mb_num=0;
- static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
-
- s->mb_x= s->resync_mb_x;
- s->first_slice_line=1;
- for(s->mb_y= s->resync_mb_y; mb_num < mb_count; s->mb_y++){
- ff_init_block_index(s);
- for(; mb_num < mb_count && s->mb_x<s->mb_width; s->mb_x++){
- const int xy= s->mb_x + s->mb_y*s->mb_stride;
-
- mb_num++;
- ff_update_block_index(s);
- if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1)
- s->first_slice_line=0;
-
- if(s->pict_type==I_TYPE){
- int ac_pred= get_bits1(&s->gb);
- int cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
- if(cbpy<0){
- fprintf(stderr, "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- s->cbp_table[xy]|= cbpy<<2;
- s->current_picture.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED;
- }else{ /* P || S_TYPE */
- if(IS_INTRA(s->current_picture.mb_type[xy])){
- int dir=0,i;
- int ac_pred = get_bits1(&s->gb);
- int cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
-
- if(cbpy<0){
- fprintf(stderr, "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- if(s->cbp_table[xy] & 8) {
- change_qscale(s, quant_tab[get_bits(&s->gb, 2)]);
- }
- s->current_picture.qscale_table[xy]= s->qscale;
-
- for(i=0; i<6; i++){
- int dc_pred_dir;
- int dc= mpeg4_decode_dc(s, i, &dc_pred_dir);
- if(dc < 0){
- fprintf(stderr, "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- dir<<=1;
- if(dc_pred_dir) dir|=1;
- }
- s->cbp_table[xy]&= 3; //remove dquant
- s->cbp_table[xy]|= cbpy<<2;
- s->current_picture.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED;
- s->pred_dir_table[xy]= dir;
- }else if(IS_SKIP(s->current_picture.mb_type[xy])){
- s->current_picture.qscale_table[xy]= s->qscale;
- s->cbp_table[xy]= 0;
- }else{
- int cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
-
- if(cbpy<0){
- fprintf(stderr, "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- if(s->cbp_table[xy] & 8) {
- change_qscale(s, quant_tab[get_bits(&s->gb, 2)]);
- }
- s->current_picture.qscale_table[xy]= s->qscale;
-
- s->cbp_table[xy]&= 3; //remove dquant
- s->cbp_table[xy]|= (cbpy^0xf)<<2;
- }
- }
- }
- if(mb_num >= mb_count) return 0;
- s->mb_x= 0;
- }
- return 0;
-}
-
-/**
- * decodes the first & second partition
- * @return <0 if error (and sets error type in the error_status_table)
- */
-int ff_mpeg4_decode_partitions(MpegEncContext *s)
-{
- int mb_num;
- const int part_a_error= s->pict_type==I_TYPE ? (DC_ERROR|MV_ERROR) : MV_ERROR;
- const int part_a_end = s->pict_type==I_TYPE ? (DC_END |MV_END) : MV_END;
-
- mb_num= mpeg4_decode_partition_a(s);
- if(mb_num<0){
- ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error);
- return -1;
- }
-
- if(s->resync_mb_x + s->resync_mb_y*s->mb_width + mb_num > s->mb_num){
- fprintf(stderr, "slice below monitor ...\n");
- ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error);
- return -1;
- }
-
- s->mb_num_left= mb_num;
-
- if(s->pict_type==I_TYPE){
- if(get_bits_long(&s->gb, 19)!=DC_MARKER){
- fprintf(stderr, "marker missing after first I partition at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- }else{
- if(get_bits(&s->gb, 17)!=MOTION_MARKER){
- fprintf(stderr, "marker missing after first P partition at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- }
- ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, part_a_end);
-
- if( mpeg4_decode_partition_b(s, mb_num) < 0){
- if(s->pict_type==P_TYPE)
- ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, DC_ERROR);
- return -1;
- }else{
- if(s->pict_type==P_TYPE)
- ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, DC_END);
- }
-
- return 0;
-}
-
-/**
- * decode partition C of one MB.
- * @return <0 if an error occured
- */
-static int mpeg4_decode_partitioned_mb(MpegEncContext *s, DCTELEM block[6][64])
-{
- int cbp, mb_type;
- const int xy= s->mb_x + s->mb_y*s->mb_stride;
-
- mb_type= s->current_picture.mb_type[xy];
- cbp = s->cbp_table[xy];
-
- if(s->current_picture.qscale_table[xy] != s->qscale){
- s->qscale= s->current_picture.qscale_table[xy];
- s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
- s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
- }
-
- if (s->pict_type == P_TYPE || s->pict_type==S_TYPE) {
- int i;
- for(i=0; i<4; i++){
- s->mv[0][i][0] = s->motion_val[ s->block_index[i] ][0];
- s->mv[0][i][1] = s->motion_val[ s->block_index[i] ][1];
- }
- s->mb_intra = IS_INTRA(mb_type);
-
- if (IS_SKIP(mb_type)) {
- /* skip mb */
- for(i=0;i<6;i++)
- s->block_last_index[i] = -1;
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE){
- s->mcsel=1;
- s->mb_skiped = 0;
- }else{
- s->mcsel=0;
- s->mb_skiped = 1;
- }
- }else if(s->mb_intra){
- s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
- }else if(!s->mb_intra){
-// s->mcsel= 0; //FIXME do we need to init that
-
- s->mv_dir = MV_DIR_FORWARD;
- if (IS_8X8(mb_type)) {
- s->mv_type = MV_TYPE_8X8;
- } else {
- s->mv_type = MV_TYPE_16X16;
- }
- }
- } else { /* I-Frame */
- s->mb_intra = 1;
- s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
- }
-
- if (!IS_SKIP(mb_type)) {
- int i;
- /* decode each block */
- for (i = 0; i < 6; i++) {
- if(mpeg4_decode_block(s, block[i], i, cbp&32, s->mb_intra, s->rvlc) < 0){
- fprintf(stderr, "texture corrupted at %d %d %d\n", s->mb_x, s->mb_y, s->mb_intra);
- return -1;
- }
- cbp+=cbp;
- }
- }
-
- /* per-MB end of slice check */
-
- if(--s->mb_num_left <= 0){
-//printf("%06X %d\n", show_bits(&s->gb, 24), s->gb.size_in_bits - get_bits_count(&s->gb));
- if(mpeg4_is_resync(s))
- return SLICE_END;
- else
- return SLICE_NOEND;
- }else{
- if(mpeg4_is_resync(s)){
- const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1;
- if(s->cbp_table[xy+delta])
- return SLICE_END;
- }
- return SLICE_OK;
- }
-}
-
-int ff_h263_decode_mb(MpegEncContext *s,
- DCTELEM block[6][64])
-{
- int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant;
- int16_t *mot_val;
- static int8_t quant_tab[4] = { -1, -2, 1, 2 };
- const int xy= s->mb_x + s->mb_y * s->mb_stride;
-
- if (s->pict_type == P_TYPE || s->pict_type==S_TYPE) {
- do{
- if (get_bits1(&s->gb)) {
- /* skip mb */
- s->mb_intra = 0;
- for(i=0;i<6;i++)
- s->block_last_index[i] = -1;
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE){
- s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0;
- s->mcsel=1;
- s->mv[0][0][0]= get_amv(s, 0);
- s->mv[0][0][1]= get_amv(s, 1);
-
- s->mb_skiped = 0;
- }else{
- s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
- s->mcsel=0;
- s->mv[0][0][0] = 0;
- s->mv[0][0][1] = 0;
- s->mb_skiped = 1;
- }
- goto end;
- }
- cbpc = get_vlc2(&s->gb, inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
- //fprintf(stderr, "\tCBPC: %d", cbpc);
- if (cbpc < 0){
- fprintf(stderr, "cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- }while(cbpc == 20);
-
- dquant = cbpc & 8;
- s->mb_intra = ((cbpc & 4) != 0);
- if (s->mb_intra) goto intra;
-
- if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0)
- s->mcsel= get_bits1(&s->gb);
- else s->mcsel= 0;
- cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
- cbp = (cbpc & 3) | ((cbpy ^ 0xf) << 2);
- if (dquant) {
- change_qscale(s, quant_tab[get_bits(&s->gb, 2)]);
- }
- if((!s->progressive_sequence) && (cbp || (s->workaround_bugs&FF_BUG_XVID_ILACE)))
- s->interlaced_dct= get_bits1(&s->gb);
-
- s->mv_dir = MV_DIR_FORWARD;
- if ((cbpc & 16) == 0) {
- if(s->mcsel){
- s->current_picture.mb_type[xy]= MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0;
- /* 16x16 global motion prediction */
- s->mv_type = MV_TYPE_16X16;
- mx= get_amv(s, 0);
- my= get_amv(s, 1);
- s->mv[0][0][0] = mx;
- s->mv[0][0][1] = my;
- }else if((!s->progressive_sequence) && get_bits1(&s->gb)){
- s->current_picture.mb_type[xy]= MB_TYPE_16x8 | MB_TYPE_L0 | MB_TYPE_INTERLACED;
- /* 16x8 field motion prediction */
- s->mv_type= MV_TYPE_FIELD;
-
- s->field_select[0][0]= get_bits1(&s->gb);
- s->field_select[0][1]= get_bits1(&s->gb);
-
- h263_pred_motion(s, 0, &pred_x, &pred_y);
-
- for(i=0; i<2; i++){
- mx = h263_decode_motion(s, pred_x, s->f_code);
- if (mx >= 0xffff)
- return -1;
-
- my = h263_decode_motion(s, pred_y/2, s->f_code);
- if (my >= 0xffff)
- return -1;
-
- s->mv[0][i][0] = mx;
- s->mv[0][i][1] = my;
- }
- }else{
- s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_L0;
- /* 16x16 motion prediction */
- s->mv_type = MV_TYPE_16X16;
- h263_pred_motion(s, 0, &pred_x, &pred_y);
- if (s->umvplus)
- mx = h263p_decode_umotion(s, pred_x);
- else
- mx = h263_decode_motion(s, pred_x, s->f_code);
-
- if (mx >= 0xffff)
- return -1;
-
- if (s->umvplus)
- my = h263p_decode_umotion(s, pred_y);
- else
- my = h263_decode_motion(s, pred_y, s->f_code);
-
- if (my >= 0xffff)
- return -1;
- s->mv[0][0][0] = mx;
- s->mv[0][0][1] = my;
-
- if (s->umvplus && (mx - pred_x) == 1 && (my - pred_y) == 1)
- skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */
- }
- } else {
- s->current_picture.mb_type[xy]= MB_TYPE_8x8 | MB_TYPE_L0;
- s->mv_type = MV_TYPE_8X8;
- for(i=0;i<4;i++) {
- mot_val = h263_pred_motion(s, i, &pred_x, &pred_y);
- if (s->umvplus)
- mx = h263p_decode_umotion(s, pred_x);
- else
- mx = h263_decode_motion(s, pred_x, s->f_code);
- if (mx >= 0xffff)
- return -1;
-
- if (s->umvplus)
- my = h263p_decode_umotion(s, pred_y);
- else
- my = h263_decode_motion(s, pred_y, s->f_code);
- if (my >= 0xffff)
- return -1;
- s->mv[0][i][0] = mx;
- s->mv[0][i][1] = my;
- if (s->umvplus && (mx - pred_x) == 1 && (my - pred_y) == 1)
- skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */
- mot_val[0] = mx;
- mot_val[1] = my;
- }
- }
- } else if(s->pict_type==B_TYPE) {
- int modb1; // first bit of modb
- int modb2; // second bit of modb
- int mb_type;
-
- s->mb_intra = 0; //B-frames never contain intra blocks
- s->mcsel=0; // ... true gmc blocks
-
- if(s->mb_x==0){
- for(i=0; i<2; i++){
- s->last_mv[i][0][0]=
- s->last_mv[i][0][1]=
- s->last_mv[i][1][0]=
- s->last_mv[i][1][1]= 0;
- }
- }
-
- /* if we skipped it in the future P Frame than skip it now too */
- s->mb_skiped= s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC
-
- if(s->mb_skiped){
- /* skip mb */
- for(i=0;i<6;i++)
- s->block_last_index[i] = -1;
-
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- s->mv[0][0][0] = 0;
- s->mv[0][0][1] = 0;
- s->mv[1][0][0] = 0;
- s->mv[1][0][1] = 0;
- s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
- goto end;
- }
-
- modb1= get_bits1(&s->gb);
- if(modb1){
- mb_type= MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1; //like MB_TYPE_B_DIRECT but no vectors coded
- cbp=0;
- }else{
- modb2= get_bits1(&s->gb);
- mb_type= get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1);
- if(mb_type<0){
- printf("illegal MB_type\n");
- return -1;
- }
- mb_type= mb_type_b_map[ mb_type ];
- if(modb2) cbp= 0;
- else cbp= get_bits(&s->gb, 6);
-
- if ((!IS_DIRECT(mb_type)) && cbp) {
- if(get_bits1(&s->gb)){
- change_qscale(s, get_bits1(&s->gb)*4 - 2);
- }
- }
-
- if(!s->progressive_sequence){
- if(cbp)
- s->interlaced_dct= get_bits1(&s->gb);
-
- if(!IS_DIRECT(mb_type) && get_bits1(&s->gb)){
- mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
- mb_type &= ~MB_TYPE_16x16;
-
- if(USES_LIST(mb_type, 0)){
- s->field_select[0][0]= get_bits1(&s->gb);
- s->field_select[0][1]= get_bits1(&s->gb);
- }
- if(USES_LIST(mb_type, 1)){
- s->field_select[1][0]= get_bits1(&s->gb);
- s->field_select[1][1]= get_bits1(&s->gb);
- }
- }
- }
-
- s->mv_dir = 0;
- if((mb_type & (MB_TYPE_DIRECT2|MB_TYPE_INTERLACED)) == 0){
- s->mv_type= MV_TYPE_16X16;
-
- if(USES_LIST(mb_type, 0)){
- s->mv_dir = MV_DIR_FORWARD;
-
- mx = h263_decode_motion(s, s->last_mv[0][0][0], s->f_code);
- my = h263_decode_motion(s, s->last_mv[0][0][1], s->f_code);
- s->last_mv[0][1][0]= s->last_mv[0][0][0]= s->mv[0][0][0] = mx;
- s->last_mv[0][1][1]= s->last_mv[0][0][1]= s->mv[0][0][1] = my;
- }
-
- if(USES_LIST(mb_type, 1)){
- s->mv_dir |= MV_DIR_BACKWARD;
-
- mx = h263_decode_motion(s, s->last_mv[1][0][0], s->b_code);
- my = h263_decode_motion(s, s->last_mv[1][0][1], s->b_code);
- s->last_mv[1][1][0]= s->last_mv[1][0][0]= s->mv[1][0][0] = mx;
- s->last_mv[1][1][1]= s->last_mv[1][0][1]= s->mv[1][0][1] = my;
- }
- }else if(!IS_DIRECT(mb_type)){
- s->mv_type= MV_TYPE_FIELD;
-
- if(USES_LIST(mb_type, 0)){
- s->mv_dir = MV_DIR_FORWARD;
-
- for(i=0; i<2; i++){
- mx = h263_decode_motion(s, s->last_mv[0][i][0] , s->f_code);
- my = h263_decode_motion(s, s->last_mv[0][i][1]/2, s->f_code);
- s->last_mv[0][i][0]= s->mv[0][i][0] = mx;
- s->last_mv[0][i][1]= (s->mv[0][i][1] = my)*2;
- }
- }
-
- if(USES_LIST(mb_type, 1)){
- s->mv_dir |= MV_DIR_BACKWARD;
-
- for(i=0; i<2; i++){
- mx = h263_decode_motion(s, s->last_mv[1][i][0] , s->b_code);
- my = h263_decode_motion(s, s->last_mv[1][i][1]/2, s->b_code);
- s->last_mv[1][i][0]= s->mv[1][i][0] = mx;
- s->last_mv[1][i][1]= (s->mv[1][i][1] = my)*2;
- }
- }
- }
- }
-
- if(IS_DIRECT(mb_type)){
- if(IS_SKIP(mb_type))
- mx=my=0;
- else{
- mx = h263_decode_motion(s, 0, 1);
- my = h263_decode_motion(s, 0, 1);
- }
-
- s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
- mb_type |= ff_mpeg4_set_direct_mv(s, mx, my);
- }
- s->current_picture.mb_type[xy]= mb_type;
- } else { /* I-Frame */
- do{
- cbpc = get_vlc2(&s->gb, intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
- if (cbpc < 0){
- fprintf(stderr, "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- }while(cbpc == 8);
-
- dquant = cbpc & 4;
- s->mb_intra = 1;
-intra:
- s->current_picture.mb_type[xy]= MB_TYPE_INTRA;
- if (s->h263_pred || s->h263_aic) {
- s->ac_pred = get_bits1(&s->gb);
- if(s->ac_pred){
- s->current_picture.mb_type[xy]= MB_TYPE_INTRA | MB_TYPE_ACPRED;
-
- if (s->h263_aic)
- s->h263_aic_dir = get_bits1(&s->gb);
- }
- }else
- s->ac_pred = 0;
-
- cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
- if(cbpy<0){
- fprintf(stderr, "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- cbp = (cbpc & 3) | (cbpy << 2);
- if (dquant) {
- change_qscale(s, quant_tab[get_bits(&s->gb, 2)]);
- }
-
- if(!s->progressive_sequence)
- s->interlaced_dct= get_bits1(&s->gb);
-
- /* decode each block */
- if (s->h263_pred) {
- for (i = 0; i < 6; i++) {
- if (mpeg4_decode_block(s, block[i], i, cbp&32, 1, 0) < 0)
- return -1;
- cbp+=cbp;
- }
- } else {
- for (i = 0; i < 6; i++) {
- if (h263_decode_block(s, block[i], i, cbp&32) < 0)
- return -1;
- cbp+=cbp;
- }
- }
- goto end;
- }
-
- /* decode each block */
- if (s->h263_pred) {
- for (i = 0; i < 6; i++) {
- if (mpeg4_decode_block(s, block[i], i, cbp&32, 0, 0) < 0)
- return -1;
- cbp+=cbp;
- }
- } else {
- for (i = 0; i < 6; i++) {
- if (h263_decode_block(s, block[i], i, cbp&32) < 0)
- return -1;
- cbp+=cbp;
- }
- }
-end:
-
- /* per-MB end of slice check */
- if(s->codec_id==CODEC_ID_MPEG4){
- if(mpeg4_is_resync(s)){
- const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1;
- if(s->pict_type==B_TYPE && s->next_picture.mbskip_table[xy + delta])
- return SLICE_OK;
- return SLICE_END;
- }
- }else{
- int v= show_bits(&s->gb, 16);
-
- if(get_bits_count(&s->gb) + 16 > s->gb.size_in_bits){
- v>>= get_bits_count(&s->gb) + 16 - s->gb.size_in_bits;
- }
-
- if(v==0)
- return SLICE_END;
- }
-
- return SLICE_OK;
-}
-
-static int h263_decode_motion(MpegEncContext * s, int pred, int f_code)
-{
- int code, val, sign, shift, l;
- code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
-
- if (code == 0)
- return pred;
- if (code < 0)
- return 0xffff;
-
- sign = get_bits1(&s->gb);
- shift = f_code - 1;
- val = code;
- if (shift) {
- val = (val - 1) << shift;
- val |= get_bits(&s->gb, shift);
- val++;
- }
- if (sign)
- val = -val;
- val += pred;
-
- /* modulo decoding */
- if (!s->h263_long_vectors) {
- l = 1 << (f_code + 4);
- val = ((val + l)&(l*2-1)) - l;
- } else {
- /* horrible h263 long vector mode */
- if (pred < -31 && val < -63)
- val += 64;
- if (pred > 32 && val > 63)
- val -= 64;
-
- }
- return val;
-}
-
-/* Decodes RVLC of H.263+ UMV */
-static int h263p_decode_umotion(MpegEncContext * s, int pred)
-{
- int code = 0, sign;
-
- if (get_bits1(&s->gb)) /* Motion difference = 0 */
- return pred;
-
- code = 2 + get_bits1(&s->gb);
-
- while (get_bits1(&s->gb))
- {
- code <<= 1;
- code += get_bits1(&s->gb);
- }
- sign = code & 1;
- code >>= 1;
-
- code = (sign) ? (pred - code) : (pred + code);
-#ifdef DEBUG
- fprintf(stderr,"H.263+ UMV Motion = %d\n", code);
-#endif
- return code;
-
-}
-
-static int h263_decode_block(MpegEncContext * s, DCTELEM * block,
- int n, int coded)
-{
- int code, level, i, j, last, run;
- RLTable *rl = &rl_inter;
- const uint8_t *scan_table;
-
- scan_table = s->intra_scantable.permutated;
- if (s->h263_aic && s->mb_intra) {
- rl = &rl_intra_aic;
- i = 0;
- if (s->ac_pred) {
- if (s->h263_aic_dir)
- scan_table = s->intra_v_scantable.permutated; /* left */
- else
- scan_table = s->intra_h_scantable.permutated; /* top */
- }
- } else if (s->mb_intra) {
- /* DC coef */
- if(s->h263_rv10){
- if (s->rv10_version == 3 && s->pict_type == I_TYPE) {
- int component, diff;
- component = (n <= 3 ? 0 : n - 4 + 1);
- level = s->last_dc[component];
- if (s->rv10_first_dc_coded[component]) {
- diff = rv_decode_dc(s, n);
- if (diff == 0xffff)
- return -1;
- level += diff;
- level = level & 0xff; /* handle wrap round */
- s->last_dc[component] = level;
- } else {
- s->rv10_first_dc_coded[component] = 1;
- }
- } else {
- level = get_bits(&s->gb, 8);
- }
- }else{
- level = get_bits(&s->gb, 8);
- if((level&0x7F) == 0){
- fprintf(stderr, "illegal dc %d at %d %d\n", level, s->mb_x, s->mb_y);
- return -1;
- }
- if (level == 255)
- level = 128;
- }
- block[0] = level;
- i = 1;
- } else {
- i = 0;
- }
- if (!coded) {
- if (s->mb_intra && s->h263_aic)
- goto not_coded;
- s->block_last_index[n] = i - 1;
- return 0;
- }
-
- for(;;) {
- code = get_vlc2(&s->gb, rl->vlc.table, TEX_VLC_BITS, 2);
- if (code < 0){
- fprintf(stderr, "illegal ac vlc code at %dx%d\n", s->mb_x, s->mb_y);
- return -1;
- }
- if (code == rl->n) {
- /* escape */
- if (s->h263_flv > 1) {
- int is11 = get_bits1(&s->gb);
- last = get_bits1(&s->gb);
- run = get_bits(&s->gb, 6);
- if(is11){
- level = get_sbits(&s->gb, 11);
- } else {
- level = get_sbits(&s->gb, 7);
- }
- } else {
- last = get_bits1(&s->gb);
- run = get_bits(&s->gb, 6);
- level = (int8_t)get_bits(&s->gb, 8);
- if(level == -128){
- if (s->h263_rv10) {
- /* XXX: should patch encoder too */
- level = get_sbits(&s->gb, 12);
- }else{
- level = get_bits(&s->gb, 5);
- level |= get_sbits(&s->gb, 6)<<5;
- }
- }
- }
- } else {
- run = rl->table_run[code];
- level = rl->table_level[code];
- last = code >= rl->last;
- if (get_bits1(&s->gb))
- level = -level;
- }
- i += run;
- if (i >= 64){
- fprintf(stderr, "run overflow at %dx%d\n", s->mb_x, s->mb_y);
- return -1;
- }
- j = scan_table[i];
- block[j] = level;
- if (last)
- break;
- i++;
- }
-not_coded:
- if (s->mb_intra && s->h263_aic) {
- h263_pred_acdc(s, block, n);
- i = 63;
- }
- s->block_last_index[n] = i;
- return 0;
-}
-
-/**
- * decodes the dc value.
- * @param n block index (0-3 are luma, 4-5 are chroma)
- * @param dir_ptr the prediction direction will be stored here
- * @return the quantized dc
- */
-static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr)
-{
- int level, pred, code;
- uint16_t *dc_val;
-
- if (n < 4)
- code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1);
- else
- code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1);
- if (code < 0 || code > 9 /* && s->nbit<9 */){
- fprintf(stderr, "illegal dc vlc\n");
- return -1;
- }
- if (code == 0) {
- level = 0;
- } else {
- if(IS_3IV1){
- if(code==1)
- level= 2*get_bits1(&s->gb)-1;
- else{
- if(get_bits1(&s->gb))
- level = get_bits(&s->gb, code-1) + (1<<(code-1));
- else
- level = -get_bits(&s->gb, code-1) - (1<<(code-1));
- }
- }else{
- level = get_xbits(&s->gb, code);
- }
-
- if (code > 8){
- if(get_bits1(&s->gb)==0){ /* marker */
- if(s->error_resilience>=2){
- fprintf(stderr, "dc marker bit missing\n");
- return -1;
- }
- }
- }
- }
- pred = ff_mpeg4_pred_dc(s, n, &dc_val, dir_ptr);
- level += pred;
- if (level < 0){
- if(s->error_resilience>=3){
- fprintf(stderr, "dc<0 at %dx%d\n", s->mb_x, s->mb_y);
- return -1;
- }
- level = 0;
- }
- if (n < 4) {
- *dc_val = level * s->y_dc_scale;
- } else {
- *dc_val = level * s->c_dc_scale;
- }
- if(IS_3IV1)
- *dc_val = level * 8;
-
- if(s->error_resilience>=3){
- if(*dc_val > 2048 + s->y_dc_scale + s->c_dc_scale){
- fprintf(stderr, "dc overflow at %dx%d\n", s->mb_x, s->mb_y);
- return -1;
- }
- }
- return level;
-}
-
-/**
- * decodes a block.
- * @return <0 if an error occured
- */
-static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
- int n, int coded, int intra, int rvlc)
-{
- int level, i, last, run;
- int dc_pred_dir;
- RLTable * rl;
- RL_VLC_ELEM * rl_vlc;
- const uint8_t * scan_table;
- int qmul, qadd;
-
- //Note intra & rvlc should be optimized away if this is inlined
-
- if(intra) {
- /* DC coef */
- if(s->partitioned_frame){
- level = s->dc_val[0][ s->block_index[n] ];
- if(n<4) level= FASTDIV((level + (s->y_dc_scale>>1)), s->y_dc_scale);
- else level= FASTDIV((level + (s->c_dc_scale>>1)), s->c_dc_scale);
- dc_pred_dir= (s->pred_dir_table[s->mb_x + s->mb_y*s->mb_stride]<<n)&32;
- }else{
- level = mpeg4_decode_dc(s, n, &dc_pred_dir);
- if (level < 0)
- return -1;
- }
- block[0] = level;
- i = 0;
- if (!coded)
- goto not_coded;
-
- if(rvlc){
- rl = &rvlc_rl_intra;
- rl_vlc = rvlc_rl_intra.rl_vlc[0];
- }else{
- rl = &rl_intra;
- rl_vlc = rl_intra.rl_vlc[0];
- }
- if (s->ac_pred) {
- if (dc_pred_dir == 0)
- scan_table = s->intra_v_scantable.permutated; /* left */
- else
- scan_table = s->intra_h_scantable.permutated; /* top */
- } else {
- scan_table = s->intra_scantable.permutated;
- }
- qmul=1;
- qadd=0;
- } else {
- i = -1;
- if (!coded) {
- s->block_last_index[n] = i;
- return 0;
- }
- if(rvlc) rl = &rvlc_rl_inter;
- else rl = &rl_inter;
-
- scan_table = s->intra_scantable.permutated;
-
- if(s->mpeg_quant){
- qmul=1;
- qadd=0;
- if(rvlc){
- rl_vlc = rvlc_rl_inter.rl_vlc[0];
- }else{
- rl_vlc = rl_inter.rl_vlc[0];
- }
- }else{
- qmul = s->qscale << 1;
- qadd = (s->qscale - 1) | 1;
- if(rvlc){
- rl_vlc = rvlc_rl_inter.rl_vlc[s->qscale];
- }else{
- rl_vlc = rl_inter.rl_vlc[s->qscale];
- }
- }
- }
- {
- OPEN_READER(re, &s->gb);
- for(;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2);
- if (level==0) {
- /* escape */
- if(rvlc){
- if(SHOW_UBITS(re, &s->gb, 1)==0){
- fprintf(stderr, "1. marker bit missing in rvlc esc\n");
- return -1;
- }; SKIP_CACHE(re, &s->gb, 1);
-
- last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1);
- run= SHOW_UBITS(re, &s->gb, 6); LAST_SKIP_CACHE(re, &s->gb, 6);
- SKIP_COUNTER(re, &s->gb, 1+1+6);
- UPDATE_CACHE(re, &s->gb);
-
- if(SHOW_UBITS(re, &s->gb, 1)==0){
- fprintf(stderr, "2. marker bit missing in rvlc esc\n");
- return -1;
- }; SKIP_CACHE(re, &s->gb, 1);
-
- level= SHOW_UBITS(re, &s->gb, 11); SKIP_CACHE(re, &s->gb, 11);
-
- if(SHOW_UBITS(re, &s->gb, 5)!=0x10){
- fprintf(stderr, "reverse esc missing\n");
- return -1;
- }; SKIP_CACHE(re, &s->gb, 5);
-
- level= level * qmul + qadd;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); LAST_SKIP_CACHE(re, &s->gb, 1);
- SKIP_COUNTER(re, &s->gb, 1+11+5+1);
-
- i+= run + 1;
- if(last) i+=192;
- }else{
- int cache;
- cache= GET_CACHE(re, &s->gb);
-
- if(IS_3IV1)
- cache ^= 0xC0000000;
-
- if (cache&0x80000000) {
- if (cache&0x40000000) {
- /* third escape */
- SKIP_CACHE(re, &s->gb, 2);
- last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1);
- run= SHOW_UBITS(re, &s->gb, 6); LAST_SKIP_CACHE(re, &s->gb, 6);
- SKIP_COUNTER(re, &s->gb, 2+1+6);
- UPDATE_CACHE(re, &s->gb);
-
- if(IS_3IV1){
- level= SHOW_SBITS(re, &s->gb, 12); LAST_SKIP_BITS(re, &s->gb, 12);
- }else{
- if(SHOW_UBITS(re, &s->gb, 1)==0){
- fprintf(stderr, "1. marker bit missing in 3. esc\n");
- return -1;
- }; SKIP_CACHE(re, &s->gb, 1);
-
- level= SHOW_SBITS(re, &s->gb, 12); SKIP_CACHE(re, &s->gb, 12);
-
- if(SHOW_UBITS(re, &s->gb, 1)==0){
- fprintf(stderr, "2. marker bit missing in 3. esc\n");
- return -1;
- }; LAST_SKIP_CACHE(re, &s->gb, 1);
-
- SKIP_COUNTER(re, &s->gb, 1+12+1);
- }
-
- if(level*s->qscale>1024 || level*s->qscale<-1024){
- fprintf(stderr, "|level| overflow in 3. esc, qp=%d\n", s->qscale);
- return -1;
- }
-#if 1
- {
- const int abs_level= ABS(level);
- if(abs_level<=MAX_LEVEL && run<=MAX_RUN && !(s->workaround_bugs&FF_BUG_AC_VLC)){
- const int run1= run - rl->max_run[last][abs_level] - 1;
- if(abs_level <= rl->max_level[last][run]){
- fprintf(stderr, "illegal 3. esc, vlc encoding possible\n");
- return -1;
- }
- if(s->error_resilience > FF_ER_COMPLIANT){
- if(abs_level <= rl->max_level[last][run]*2){
- fprintf(stderr, "illegal 3. esc, esc 1 encoding possible\n");
- return -1;
- }
- if(run1 >= 0 && abs_level <= rl->max_level[last][run1]){
- fprintf(stderr, "illegal 3. esc, esc 2 encoding possible\n");
- return -1;
- }
- }
- }
- }
-#endif
- if (level>0) level= level * qmul + qadd;
- else level= level * qmul - qadd;
-
- i+= run + 1;
- if(last) i+=192;
- } else {
- /* second escape */
-#if MIN_CACHE_BITS < 20
- LAST_SKIP_BITS(re, &s->gb, 2);
- UPDATE_CACHE(re, &s->gb);
-#else
- SKIP_BITS(re, &s->gb, 2);
-#endif
- GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2);
- i+= run + rl->max_run[run>>7][level/qmul] +1; //FIXME opt indexing
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- }
- } else {
- /* first escape */
-#if MIN_CACHE_BITS < 19
- LAST_SKIP_BITS(re, &s->gb, 1);
- UPDATE_CACHE(re, &s->gb);
-#else
- SKIP_BITS(re, &s->gb, 1);
-#endif
- GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2);
- i+= run;
- level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- }
- }
- } else {
- i+= run;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- }
- if (i > 62){
- i-= 192;
- if(i&(~63)){
- fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- block[scan_table[i]] = level;
- break;
- }
-
- block[scan_table[i]] = level;
- }
- CLOSE_READER(re, &s->gb);
- }
- not_coded:
- if (s->mb_intra) {
- mpeg4_pred_ac(s, block, n, dc_pred_dir);
- if (s->ac_pred) {
- i = 63; /* XXX: not optimal */
- }
- }
- s->block_last_index[n] = i;
- return 0;
-}
-
-/* most is hardcoded. should extend to handle all h263 streams */
-int h263_decode_picture_header(MpegEncContext *s)
-{
- int format, width, height, i;
- uint32_t startcode;
-
- align_get_bits(&s->gb);
-
- startcode= get_bits(&s->gb, 22-8);
-
- for(i= s->gb.size_in_bits - get_bits_count(&s->gb); i>24; i-=8) {
- startcode = ((startcode << 8) | get_bits(&s->gb, 8)) & 0x003FFFFF;
-
- if(startcode == 0x20)
- break;
- }
-
- if (startcode != 0x20) {
- fprintf(stderr, "Bad picture start code\n");
- return -1;
- }
- /* temporal reference */
- s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
-
- /* PTYPE starts here */
- if (get_bits1(&s->gb) != 1) {
- /* marker */
- fprintf(stderr, "Bad marker\n");
- return -1;
- }
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "Bad H263 id\n");
- return -1; /* h263 id */
- }
- skip_bits1(&s->gb); /* split screen off */
- skip_bits1(&s->gb); /* camera off */
- skip_bits1(&s->gb); /* freeze picture release off */
-
- /* Reset GOB number */
- s->gob_number = 0;
-
- format = get_bits(&s->gb, 3);
- /*
- 0 forbidden
- 1 sub-QCIF
- 10 QCIF
- 7 extended PTYPE (PLUSPTYPE)
- */
-
- if (format != 7 && format != 6) {
- s->h263_plus = 0;
- /* H.263v1 */
- width = h263_format[format][0];
- height = h263_format[format][1];
- if (!width)
- return -1;
-
- s->pict_type = I_TYPE + get_bits1(&s->gb);
-
- s->unrestricted_mv = get_bits1(&s->gb);
- s->h263_long_vectors = s->unrestricted_mv;
-
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "H263 SAC not supported\n");
- return -1; /* SAC: off */
- }
- if (get_bits1(&s->gb) != 0) {
- s->mv_type = MV_TYPE_8X8; /* Advanced prediction mode */
- }
-
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "H263 PB frame not supported\n");
- return -1; /* not PB frame */
- }
- s->qscale = get_bits(&s->gb, 5);
- skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */
-
- s->width = width;
- s->height = height;
- } else {
- int ufep;
-
- /* H.263v2 */
- s->h263_plus = 1;
- ufep = get_bits(&s->gb, 3); /* Update Full Extended PTYPE */
-
- /* ufep other than 0 and 1 are reserved */
- if (ufep == 1) {
- /* OPPTYPE */
- format = get_bits(&s->gb, 3);
- dprintf("ufep=1, format: %d\n", format);
- skip_bits(&s->gb,1); /* Custom PCF */
- s->umvplus = get_bits(&s->gb, 1); /* Unrestricted Motion Vector */
- skip_bits1(&s->gb); /* Syntax-based Arithmetic Coding (SAC) */
- if (get_bits1(&s->gb) != 0) {
- s->mv_type = MV_TYPE_8X8; /* Advanced prediction mode */
- }
- if (get_bits1(&s->gb) != 0) { /* Advanced Intra Coding (AIC) */
- s->h263_aic = 1;
- }
-
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "Deblocking Filter not supported\n");
- }
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "Slice Structured not supported\n");
- }
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "Reference Picture Selection not supported\n");
- }
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "Independent Segment Decoding not supported\n");
- }
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "Alternative Inter VLC not supported\n");
- }
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "Modified Quantization not supported\n");
- }
-
- skip_bits(&s->gb, 1); /* Prevent start code emulation */
-
- skip_bits(&s->gb, 3); /* Reserved */
- } else if (ufep != 0) {
- fprintf(stderr, "Bad UFEP type (%d)\n", ufep);
- return -1;
- }
-
- /* MPPTYPE */
- s->pict_type = get_bits(&s->gb, 3) + I_TYPE;
- dprintf("pict_type: %d\n", s->pict_type);
- if (s->pict_type != I_TYPE &&
- s->pict_type != P_TYPE)
- return -1;
- skip_bits(&s->gb, 2);
- s->no_rounding = get_bits1(&s->gb);
- dprintf("RTYPE: %d\n", s->no_rounding);
- skip_bits(&s->gb, 4);
-
- /* Get the picture dimensions */
- if (ufep) {
- if (format == 6) {
- /* Custom Picture Format (CPFMT) */
- s->aspect_ratio_info = get_bits(&s->gb, 4);
- dprintf("aspect: %d\n", s->aspect_ratio_info);
- /* aspect ratios:
- 0 - forbidden
- 1 - 1:1
- 2 - 12:11 (CIF 4:3)
- 3 - 10:11 (525-type 4:3)
- 4 - 16:11 (CIF 16:9)
- 5 - 40:33 (525-type 16:9)
- 6-14 - reserved
- */
- width = (get_bits(&s->gb, 9) + 1) * 4;
- skip_bits1(&s->gb);
- height = get_bits(&s->gb, 9) * 4;
- dprintf("\nH.263+ Custom picture: %dx%d\n",width,height);
- if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
- /* aspected dimensions */
- s->aspected_width = get_bits(&s->gb, 8);
- s->aspected_height = get_bits(&s->gb, 8);
- }else{
- s->aspected_width = pixel_aspect[s->aspect_ratio_info][0];
- s->aspected_height= pixel_aspect[s->aspect_ratio_info][1];
- }
- } else {
- width = h263_format[format][0];
- height = h263_format[format][1];
- }
- if ((width == 0) || (height == 0))
- return -1;
- s->width = width;
- s->height = height;
- if (s->umvplus) {
- if(get_bits1(&s->gb)==0) /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */
- skip_bits1(&s->gb);
- }
- }
-
- s->qscale = get_bits(&s->gb, 5);
- }
- /* PEI */
- while (get_bits1(&s->gb) != 0) {
- skip_bits(&s->gb, 8);
- }
- s->f_code = 1;
-
- if(s->h263_aic){
- s->y_dc_scale_table=
- s->c_dc_scale_table= h263_aic_dc_scale_table;
- }else{
- s->y_dc_scale_table=
- s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
- }
-
- if(s->avctx->debug&FF_DEBUG_PICT_INFO){
- printf("qp:%d %c size:%d rnd:%d %s %s %s %s\n",
- s->qscale, av_get_pict_type_char(s->pict_type),
- s->gb.size_in_bits, 1-s->no_rounding,
- s->mv_type == MV_TYPE_8X8 ? "ADV" : "",
- s->umvplus ? "UMV" : "",
- s->h263_long_vectors ? "LONG" : "",
- s->h263_plus ? "+" : ""
- );
- }
-
-
- return 0;
-}
-
-static void mpeg4_decode_sprite_trajectory(MpegEncContext * s)
-{
- int i;
- int a= 2<<s->sprite_warping_accuracy;
- int rho= 3-s->sprite_warping_accuracy;
- int r=16/a;
- const int vop_ref[4][2]= {{0,0}, {s->width,0}, {0, s->height}, {s->width, s->height}}; // only true for rectangle shapes
- int d[4][2]={{0,0}, {0,0}, {0,0}, {0,0}};
- int sprite_ref[4][2];
- int virtual_ref[2][2];
- int w2, h2, w3, h3;
- int alpha=0, beta=0;
- int w= s->width;
- int h= s->height;
- int min_ab;
-
- for(i=0; i<s->num_sprite_warping_points; i++){
- int length;
- int x=0, y=0;
-
- length= get_vlc(&s->gb, &sprite_trajectory);
- if(length){
- x= get_xbits(&s->gb, length);
- }
- if(!(s->divx_version==500 && s->divx_build==413)) skip_bits1(&s->gb); /* marker bit */
-
- length= get_vlc(&s->gb, &sprite_trajectory);
- if(length){
- y=get_xbits(&s->gb, length);
- }
- skip_bits1(&s->gb); /* marker bit */
-//printf("%d %d %d %d\n", x, y, i, s->sprite_warping_accuracy);
- d[i][0]= x;
- d[i][1]= y;
- }
-
- while((1<<alpha)<w) alpha++;
- while((1<<beta )<h) beta++; // there seems to be a typo in the mpeg4 std for the definition of w' and h'
- w2= 1<<alpha;
- h2= 1<<beta;
-
-// Note, the 4th point isnt used for GMC
- if(s->divx_version==500 && s->divx_build==413){
- sprite_ref[0][0]= a*vop_ref[0][0] + d[0][0];
- sprite_ref[0][1]= a*vop_ref[0][1] + d[0][1];
- sprite_ref[1][0]= a*vop_ref[1][0] + d[0][0] + d[1][0];
- sprite_ref[1][1]= a*vop_ref[1][1] + d[0][1] + d[1][1];
- sprite_ref[2][0]= a*vop_ref[2][0] + d[0][0] + d[2][0];
- sprite_ref[2][1]= a*vop_ref[2][1] + d[0][1] + d[2][1];
- } else {
- sprite_ref[0][0]= (a>>1)*(2*vop_ref[0][0] + d[0][0]);
- sprite_ref[0][1]= (a>>1)*(2*vop_ref[0][1] + d[0][1]);
- sprite_ref[1][0]= (a>>1)*(2*vop_ref[1][0] + d[0][0] + d[1][0]);
- sprite_ref[1][1]= (a>>1)*(2*vop_ref[1][1] + d[0][1] + d[1][1]);
- sprite_ref[2][0]= (a>>1)*(2*vop_ref[2][0] + d[0][0] + d[2][0]);
- sprite_ref[2][1]= (a>>1)*(2*vop_ref[2][1] + d[0][1] + d[2][1]);
- }
-/* sprite_ref[3][0]= (a>>1)*(2*vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]);
- sprite_ref[3][1]= (a>>1)*(2*vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */
-
-// this is mostly identical to the mpeg4 std (and is totally unreadable because of that ...)
-// perhaps it should be reordered to be more readable ...
-// the idea behind this virtual_ref mess is to be able to use shifts later per pixel instead of divides
-// so the distance between points is converted from w&h based to w2&h2 based which are of the 2^x form
- virtual_ref[0][0]= 16*(vop_ref[0][0] + w2)
- + ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + w2*(r*sprite_ref[1][0] - 16*vop_ref[1][0])),w);
- virtual_ref[0][1]= 16*vop_ref[0][1]
- + ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + w2*(r*sprite_ref[1][1] - 16*vop_ref[1][1])),w);
- virtual_ref[1][0]= 16*vop_ref[0][0]
- + ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + h2*(r*sprite_ref[2][0] - 16*vop_ref[2][0])),h);
- virtual_ref[1][1]= 16*(vop_ref[0][1] + h2)
- + ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + h2*(r*sprite_ref[2][1] - 16*vop_ref[2][1])),h);
-
- switch(s->num_sprite_warping_points)
- {
- case 0:
- s->sprite_offset[0][0]= 0;
- s->sprite_offset[0][1]= 0;
- s->sprite_offset[1][0]= 0;
- s->sprite_offset[1][1]= 0;
- s->sprite_delta[0][0]= a;
- s->sprite_delta[0][1]= 0;
- s->sprite_delta[1][0]= 0;
- s->sprite_delta[1][1]= a;
- s->sprite_shift[0]= 0;
- s->sprite_shift[1]= 0;
- break;
- case 1: //GMC only
- s->sprite_offset[0][0]= sprite_ref[0][0] - a*vop_ref[0][0];
- s->sprite_offset[0][1]= sprite_ref[0][1] - a*vop_ref[0][1];
- s->sprite_offset[1][0]= ((sprite_ref[0][0]>>1)|(sprite_ref[0][0]&1)) - a*(vop_ref[0][0]/2);
- s->sprite_offset[1][1]= ((sprite_ref[0][1]>>1)|(sprite_ref[0][1]&1)) - a*(vop_ref[0][1]/2);
- s->sprite_delta[0][0]= a;
- s->sprite_delta[0][1]= 0;
- s->sprite_delta[1][0]= 0;
- s->sprite_delta[1][1]= a;
- s->sprite_shift[0]= 0;
- s->sprite_shift[1]= 0;
- break;
- case 2:
- s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+rho))
- + (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][0])
- + ( r*sprite_ref[0][1] - virtual_ref[0][1])*(-vop_ref[0][1])
- + (1<<(alpha+rho-1));
- s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+rho))
- + (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-vop_ref[0][0])
- + (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][1])
- + (1<<(alpha+rho-1));
- s->sprite_offset[1][0]= ( (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][0] + 1)
- +( r*sprite_ref[0][1] - virtual_ref[0][1])*(-2*vop_ref[0][1] + 1)
- +2*w2*r*sprite_ref[0][0]
- - 16*w2
- + (1<<(alpha+rho+1)));
- s->sprite_offset[1][1]= ( (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-2*vop_ref[0][0] + 1)
- +(-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][1] + 1)
- +2*w2*r*sprite_ref[0][1]
- - 16*w2
- + (1<<(alpha+rho+1)));
- s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0]);
- s->sprite_delta[0][1]= (+r*sprite_ref[0][1] - virtual_ref[0][1]);
- s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1]);
- s->sprite_delta[1][1]= (-r*sprite_ref[0][0] + virtual_ref[0][0]);
-
- s->sprite_shift[0]= alpha+rho;
- s->sprite_shift[1]= alpha+rho+2;
- break;
- case 3:
- min_ab= FFMIN(alpha, beta);
- w3= w2>>min_ab;
- h3= h2>>min_ab;
- s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+beta+rho-min_ab))
- + (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-vop_ref[0][0])
- + (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-vop_ref[0][1])
- + (1<<(alpha+beta+rho-min_ab-1));
- s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+beta+rho-min_ab))
- + (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-vop_ref[0][0])
- + (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-vop_ref[0][1])
- + (1<<(alpha+beta+rho-min_ab-1));
- s->sprite_offset[1][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-2*vop_ref[0][0] + 1)
- + (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-2*vop_ref[0][1] + 1)
- + 2*w2*h3*r*sprite_ref[0][0]
- - 16*w2*h3
- + (1<<(alpha+beta+rho-min_ab+1));
- s->sprite_offset[1][1]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-2*vop_ref[0][0] + 1)
- + (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-2*vop_ref[0][1] + 1)
- + 2*w2*h3*r*sprite_ref[0][1]
- - 16*w2*h3
- + (1<<(alpha+beta+rho-min_ab+1));
- s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3;
- s->sprite_delta[0][1]= (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3;
- s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3;
- s->sprite_delta[1][1]= (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3;
-
- s->sprite_shift[0]= alpha + beta + rho - min_ab;
- s->sprite_shift[1]= alpha + beta + rho - min_ab + 2;
- break;
- }
- /* try to simplify the situation */
- if( s->sprite_delta[0][0] == a<<s->sprite_shift[0]
- && s->sprite_delta[0][1] == 0
- && s->sprite_delta[1][0] == 0
- && s->sprite_delta[1][1] == a<<s->sprite_shift[0])
- {
- s->sprite_offset[0][0]>>=s->sprite_shift[0];
- s->sprite_offset[0][1]>>=s->sprite_shift[0];
- s->sprite_offset[1][0]>>=s->sprite_shift[1];
- s->sprite_offset[1][1]>>=s->sprite_shift[1];
- s->sprite_delta[0][0]= a;
- s->sprite_delta[0][1]= 0;
- s->sprite_delta[1][0]= 0;
- s->sprite_delta[1][1]= a;
- s->sprite_shift[0]= 0;
- s->sprite_shift[1]= 0;
- s->real_sprite_warping_points=1;
- }
- else{
- int shift_y= 16 - s->sprite_shift[0];
- int shift_c= 16 - s->sprite_shift[1];
-//printf("shifts %d %d\n", shift_y, shift_c);
- for(i=0; i<2; i++){
- s->sprite_offset[0][i]<<= shift_y;
- s->sprite_offset[1][i]<<= shift_c;
- s->sprite_delta[0][i]<<= shift_y;
- s->sprite_delta[1][i]<<= shift_y;
- s->sprite_shift[i]= 16;
- }
- s->real_sprite_warping_points= s->num_sprite_warping_points;
- }
-#if 0
-printf("vop:%d:%d %d:%d %d:%d, sprite:%d:%d %d:%d %d:%d, virtual: %d:%d %d:%d\n",
- vop_ref[0][0], vop_ref[0][1],
- vop_ref[1][0], vop_ref[1][1],
- vop_ref[2][0], vop_ref[2][1],
- sprite_ref[0][0], sprite_ref[0][1],
- sprite_ref[1][0], sprite_ref[1][1],
- sprite_ref[2][0], sprite_ref[2][1],
- virtual_ref[0][0], virtual_ref[0][1],
- virtual_ref[1][0], virtual_ref[1][1]
- );
-
-printf("offset: %d:%d , delta: %d %d %d %d, shift %d\n",
- s->sprite_offset[0][0], s->sprite_offset[0][1],
- s->sprite_delta[0][0], s->sprite_delta[0][1],
- s->sprite_delta[1][0], s->sprite_delta[1][1],
- s->sprite_shift[0]
- );
-#endif
-}
-
-static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){
- int hours, minutes, seconds;
-
- hours= get_bits(gb, 5);
- minutes= get_bits(gb, 6);
- skip_bits1(gb);
- seconds= get_bits(gb, 6);
-
- s->time_base= seconds + 60*(minutes + 60*hours);
-
- skip_bits1(gb);
- skip_bits1(gb);
-
- return 0;
-}
-
-static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){
- int width, height, vo_ver_id;
-
- /* vol header */
- skip_bits(gb, 1); /* random access */
- s->vo_type= get_bits(gb, 8);
- if (get_bits1(gb) != 0) { /* is_ol_id */
- vo_ver_id = get_bits(gb, 4); /* vo_ver_id */
- skip_bits(gb, 3); /* vo_priority */
- } else {
- vo_ver_id = 1;
- }
-//printf("vo type:%d\n",s->vo_type);
- s->aspect_ratio_info= get_bits(gb, 4);
- if(s->aspect_ratio_info == FF_ASPECT_EXTENDED){
- s->aspected_width = get_bits(gb, 8); // par_width
- s->aspected_height = get_bits(gb, 8); // par_height
- }else{
- s->aspected_width = pixel_aspect[s->aspect_ratio_info][0];
- s->aspected_height= pixel_aspect[s->aspect_ratio_info][1];
- }
-
- if ((s->vol_control_parameters=get_bits1(gb))) { /* vol control parameter */
- int chroma_format= get_bits(gb, 2);
- if(chroma_format!=1){
- printf("illegal chroma format\n");
- }
- s->low_delay= get_bits1(gb);
- if(get_bits1(gb)){ /* vbv parameters */
- get_bits(gb, 15); /* first_half_bitrate */
- skip_bits1(gb); /* marker */
- get_bits(gb, 15); /* latter_half_bitrate */
- skip_bits1(gb); /* marker */
- get_bits(gb, 15); /* first_half_vbv_buffer_size */
- skip_bits1(gb); /* marker */
- get_bits(gb, 3); /* latter_half_vbv_buffer_size */
- get_bits(gb, 11); /* first_half_vbv_occupancy */
- skip_bits1(gb); /* marker */
- get_bits(gb, 15); /* latter_half_vbv_occupancy */
- skip_bits1(gb); /* marker */
- }
- }else{
- // set low delay flag only once so the smart? low delay detection wont be overriden
- if(s->picture_number==0)
- s->low_delay=0;
- }
-
- s->shape = get_bits(gb, 2); /* vol shape */
- if(s->shape != RECT_SHAPE) printf("only rectangular vol supported\n");
- if(s->shape == GRAY_SHAPE && vo_ver_id != 1){
- printf("Gray shape not supported\n");
- skip_bits(gb, 4); //video_object_layer_shape_extension
- }
-
- check_marker(gb, "before time_increment_resolution");
-
- s->time_increment_resolution = get_bits(gb, 16);
-
- s->time_increment_bits = av_log2(s->time_increment_resolution - 1) + 1;
- if (s->time_increment_bits < 1)
- s->time_increment_bits = 1;
-
- check_marker(gb, "before fixed_vop_rate");
-
- if (get_bits1(gb) != 0) { /* fixed_vop_rate */
- skip_bits(gb, s->time_increment_bits);
- }
-
- if (s->shape != BIN_ONLY_SHAPE) {
- if (s->shape == RECT_SHAPE) {
- skip_bits1(gb); /* marker */
- width = get_bits(gb, 13);
- skip_bits1(gb); /* marker */
- height = get_bits(gb, 13);
- skip_bits1(gb); /* marker */
- if(width && height){ /* they should be non zero but who knows ... */
- s->width = width;
- s->height = height;
-// printf("width/height: %d %d\n", width, height);
- }
- }
-
- s->progressive_sequence= get_bits1(gb)^1;
- if(!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO))
- printf("OBMC not supported (very likely buggy encoder)\n"); /* OBMC Disable */
- if (vo_ver_id == 1) {
- s->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */
- } else {
- s->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */
- }
- if(s->vol_sprite_usage==STATIC_SPRITE) printf("Static Sprites not supported\n");
- if(s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE){
- if(s->vol_sprite_usage==STATIC_SPRITE){
- s->sprite_width = get_bits(gb, 13);
- skip_bits1(gb); /* marker */
- s->sprite_height= get_bits(gb, 13);
- skip_bits1(gb); /* marker */
- s->sprite_left = get_bits(gb, 13);
- skip_bits1(gb); /* marker */
- s->sprite_top = get_bits(gb, 13);
- skip_bits1(gb); /* marker */
- }
- s->num_sprite_warping_points= get_bits(gb, 6);
- s->sprite_warping_accuracy = get_bits(gb, 2);
- s->sprite_brightness_change= get_bits1(gb);
- if(s->vol_sprite_usage==STATIC_SPRITE)
- s->low_latency_sprite= get_bits1(gb);
- }
- // FIXME sadct disable bit if verid!=1 && shape not rect
-
- if (get_bits1(gb) == 1) { /* not_8_bit */
- s->quant_precision = get_bits(gb, 4); /* quant_precision */
- if(get_bits(gb, 4)!=8) printf("N-bit not supported\n"); /* bits_per_pixel */
- if(s->quant_precision!=5) printf("quant precission %d\n", s->quant_precision);
- } else {
- s->quant_precision = 5;
- }
-
- // FIXME a bunch of grayscale shape things
-
- if((s->mpeg_quant=get_bits1(gb))){ /* vol_quant_type */
- int i, v;
-
- /* load default matrixes */
- for(i=0; i<64; i++){
- int j= s->dsp.idct_permutation[i];
- v= ff_mpeg4_default_intra_matrix[i];
- s->intra_matrix[j]= v;
- s->chroma_intra_matrix[j]= v;
-
- v= ff_mpeg4_default_non_intra_matrix[i];
- s->inter_matrix[j]= v;
- s->chroma_inter_matrix[j]= v;
- }
-
- /* load custom intra matrix */
- if(get_bits1(gb)){
- int last=0;
- for(i=0; i<64; i++){
- int j;
- v= get_bits(gb, 8);
- if(v==0) break;
-
- last= v;
- j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
- s->intra_matrix[j]= v;
- s->chroma_intra_matrix[j]= v;
- }
-
- /* replicate last value */
- for(; i<64; i++){
- int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
- s->intra_matrix[j]= last;
- s->chroma_intra_matrix[j]= last;
- }
- }
-
- /* load custom non intra matrix */
- if(get_bits1(gb)){
- int last=0;
- for(i=0; i<64; i++){
- int j;
- v= get_bits(gb, 8);
- if(v==0) break;
-
- last= v;
- j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
- s->inter_matrix[j]= v;
- s->chroma_inter_matrix[j]= v;
- }
-
- /* replicate last value */
- for(; i<64; i++){
- int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
- s->inter_matrix[j]= last;
- s->chroma_inter_matrix[j]= last;
- }
- }
-
- // FIXME a bunch of grayscale shape things
- }
-
- if(vo_ver_id != 1)
- s->quarter_sample= get_bits1(gb);
- else s->quarter_sample=0;
-
- if(!get_bits1(gb)) printf("Complexity estimation not supported\n");
-
- s->resync_marker= !get_bits1(gb); /* resync_marker_disabled */
-
- s->data_partitioning= get_bits1(gb);
- if(s->data_partitioning){
- s->rvlc= get_bits1(gb);
- }
-
- if(vo_ver_id != 1) {
- s->new_pred= get_bits1(gb);
- if(s->new_pred){
- printf("new pred not supported\n");
- skip_bits(gb, 2); /* requested upstream message type */
- skip_bits1(gb); /* newpred segment type */
- }
- s->reduced_res_vop= get_bits1(gb);
- if(s->reduced_res_vop) printf("reduced resolution VOP not supported\n");
- }
- else{
- s->new_pred=0;
- s->reduced_res_vop= 0;
- }
-
- s->scalability= get_bits1(gb);
-
- if (s->scalability) {
- GetBitContext bak= *gb;
- int ref_layer_id;
- int ref_layer_sampling_dir;
- int h_sampling_factor_n;
- int h_sampling_factor_m;
- int v_sampling_factor_n;
- int v_sampling_factor_m;
-
- s->hierachy_type= get_bits1(gb);
- ref_layer_id= get_bits(gb, 4);
- ref_layer_sampling_dir= get_bits1(gb);
- h_sampling_factor_n= get_bits(gb, 5);
- h_sampling_factor_m= get_bits(gb, 5);
- v_sampling_factor_n= get_bits(gb, 5);
- v_sampling_factor_m= get_bits(gb, 5);
- s->enhancement_type= get_bits1(gb);
-
- if( h_sampling_factor_n==0 || h_sampling_factor_m==0
- || v_sampling_factor_n==0 || v_sampling_factor_m==0){
-
-// fprintf(stderr, "illegal scalability header (VERY broken encoder), trying to workaround\n");
- s->scalability=0;
-
- *gb= bak;
- }else
- printf("scalability not supported\n");
-
- // bin shape stuff FIXME
- }
- }
- return 0;
-}
-
-/**
- * decodes the user data stuff in the header.
- * allso inits divx/xvid/lavc_version/build
- */
-static int decode_user_data(MpegEncContext *s, GetBitContext *gb){
- char buf[256];
- int i;
- int e;
- int ver, build, ver2, ver3;
- char last;
-
- buf[0]= show_bits(gb, 8);
- for(i=1; i<256; i++){
- buf[i]= show_bits(gb, 16)&0xFF;
- if(buf[i]==0) break;
- skip_bits(gb, 8);
- }
- buf[255]=0;
-
- /* divx detection */
- e=sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last);
- if(e<2)
- e=sscanf(buf, "DivX%db%d%c", &ver, &build, &last);
- if(e>=2){
- s->divx_version= ver;
- s->divx_build= build;
- s->divx_packed= e==3 && last=='p';
- }
-
- /* ffmpeg detection */
- e=sscanf(buf, "FFmpeg%d.%d.%db%d", &ver, &ver2, &ver3, &build);
- if(e!=4)
- e=sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build);
- if(e!=4){
- if(strcmp(buf, "ffmpeg")==0){
- s->ffmpeg_version= 0x000406;
- s->lavc_build= 4600;
- }
- }
- if(e==4){
- s->ffmpeg_version= ver*256*256 + ver2*256 + ver3;
- s->lavc_build= build;
- }
-
- /* xvid detection */
- e=sscanf(buf, "XviD%d", &build);
- if(e==1){
- s->xvid_build= build;
- }
-
-//printf("User Data: %s\n", buf);
- return 0;
-}
-
-static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){
- int time_incr, time_increment;
-
- s->pict_type = get_bits(gb, 2) + I_TYPE; /* pict type: I = 0 , P = 1 */
- if(s->pict_type==B_TYPE && s->low_delay && s->vol_control_parameters==0 && !(s->flags & CODEC_FLAG_LOW_DELAY)){
- printf("low_delay flag set, but shouldnt, clearing it\n");
- s->low_delay=0;
- }
-
- s->partitioned_frame= s->data_partitioning && s->pict_type!=B_TYPE;
- if(s->partitioned_frame)
- s->decode_mb= mpeg4_decode_partitioned_mb;
- else
- s->decode_mb= ff_h263_decode_mb;
-
- if(s->time_increment_resolution==0){
- s->time_increment_resolution=1;
-// fprintf(stderr, "time_increment_resolution is illegal\n");
- }
- time_incr=0;
- while (get_bits1(gb) != 0)
- time_incr++;
-
- check_marker(gb, "before time_increment");
-
- if(s->time_increment_bits==0){
- printf("hmm, seems the headers arnt complete, trying to guess time_increment_bits\n");
-
- for(s->time_increment_bits=1 ;s->time_increment_bits<16; s->time_increment_bits++){
- if(show_bits(gb, s->time_increment_bits+1)&1) break;
- }
-
- printf("my guess is %d bits ;)\n",s->time_increment_bits);
- }
-
- if(IS_3IV1) time_increment= get_bits1(gb); //FIXME investigate further
- else time_increment= get_bits(gb, s->time_increment_bits);
-
-// printf("%d %X\n", s->time_increment_bits, time_increment);
-//printf(" type:%d modulo_time_base:%d increment:%d\n", s->pict_type, time_incr, time_increment);
- if(s->pict_type!=B_TYPE){
- s->last_time_base= s->time_base;
- s->time_base+= time_incr;
- s->time= s->time_base*s->time_increment_resolution + time_increment;
- if(s->workaround_bugs&FF_BUG_UMP4){
- if(s->time < s->last_non_b_time){
-// fprintf(stderr, "header is not mpeg4 compatible, broken encoder, trying to workaround\n");
- s->time_base++;
- s->time+= s->time_increment_resolution;
- }
- }
- s->pp_time= s->time - s->last_non_b_time;
- s->last_non_b_time= s->time;
- }else{
- s->time= (s->last_time_base + time_incr)*s->time_increment_resolution + time_increment;
- s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
- if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
-// printf("messed up order, seeking?, skiping current b frame\n");
- return FRAME_SKIPED;
- }
-
- if(s->t_frame==0) s->t_frame= s->time - s->last_time_base;
- if(s->t_frame==0) s->t_frame=1; // 1/0 protection
-//printf("%Ld %Ld %d %d\n", s->last_non_b_time, s->time, s->pp_time, s->t_frame); fflush(stdout);
- s->pp_field_time= ( ROUNDED_DIV(s->last_non_b_time, s->t_frame)
- - ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2;
- s->pb_field_time= ( ROUNDED_DIV(s->time, s->t_frame)
- - ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2;
- }
-
- s->current_picture.pts= s->time*1000LL*1000LL / s->time_increment_resolution;
- if(s->avctx->debug&FF_DEBUG_PTS)
- printf("MPEG4 PTS: %f\n", s->current_picture.pts/(1000.0*1000.0));
-
- check_marker(gb, "before vop_coded");
-
- /* vop coded */
- if (get_bits1(gb) != 1){
- printf("vop not coded\n");
- return FRAME_SKIPED;
- }
-//printf("time %d %d %d || %Ld %Ld %Ld\n", s->time_increment_bits, s->time_increment_resolution, s->time_base,
-//s->time, s->last_non_b_time, s->last_non_b_time - s->pp_time);
- if (s->shape != BIN_ONLY_SHAPE && ( s->pict_type == P_TYPE
- || (s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE))) {
- /* rounding type for motion estimation */
- s->no_rounding = get_bits1(gb);
- } else {
- s->no_rounding = 0;
- }
-//FIXME reduced res stuff
-
- if (s->shape != RECT_SHAPE) {
- if (s->vol_sprite_usage != 1 || s->pict_type != I_TYPE) {
- int width, height, hor_spat_ref, ver_spat_ref;
-
- width = get_bits(gb, 13);
- skip_bits1(gb); /* marker */
- height = get_bits(gb, 13);
- skip_bits1(gb); /* marker */
- hor_spat_ref = get_bits(gb, 13); /* hor_spat_ref */
- skip_bits1(gb); /* marker */
- ver_spat_ref = get_bits(gb, 13); /* ver_spat_ref */
- }
- skip_bits1(gb); /* change_CR_disable */
-
- if (get_bits1(gb) != 0) {
- skip_bits(gb, 8); /* constant_alpha_value */
- }
- }
-//FIXME complexity estimation stuff
-
- if (s->shape != BIN_ONLY_SHAPE) {
- int t;
- t=get_bits(gb, 3); /* intra dc VLC threshold */
-//printf("threshold %d\n", t);
- if(!s->progressive_sequence){
- s->top_field_first= get_bits1(gb);
- s->alternate_scan= get_bits1(gb);
- }else
- s->alternate_scan= 0;
- }
-
- if(s->alternate_scan){
- ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
- ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
- ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan);
- ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
- } else{
- ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
- ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
- ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
- ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
- }
-
- if(s->pict_type == S_TYPE && (s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE)){
- mpeg4_decode_sprite_trajectory(s);
- if(s->sprite_brightness_change) printf("sprite_brightness_change not supported\n");
- if(s->vol_sprite_usage==STATIC_SPRITE) printf("static sprite not supported\n");
- }
-
- if (s->shape != BIN_ONLY_SHAPE) {
- s->qscale = get_bits(gb, s->quant_precision);
- if(s->qscale==0){
- printf("Error, header damaged or not MPEG4 header (qscale=0)\n");
- return -1; // makes no sense to continue, as there is nothing left from the image then
- }
-
- if (s->pict_type != I_TYPE) {
- s->f_code = get_bits(gb, 3); /* fcode_for */
- if(s->f_code==0){
- printf("Error, header damaged or not MPEG4 header (f_code=0)\n");
- return -1; // makes no sense to continue, as the MV decoding will break very quickly
- }
- }else
- s->f_code=1;
-
- if (s->pict_type == B_TYPE) {
- s->b_code = get_bits(gb, 3);
- }else
- s->b_code=1;
-
- if(s->avctx->debug&FF_DEBUG_PICT_INFO){
- printf("qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s\n",
- s->qscale, s->f_code, s->b_code,
- s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
- gb->size_in_bits,s->progressive_sequence, s->alternate_scan, s->top_field_first,
- s->quarter_sample ? "q" : "h", s->data_partitioning, s->resync_marker, s->num_sprite_warping_points,
- s->sprite_warping_accuracy, 1-s->no_rounding, s->vo_type, s->vol_control_parameters ? " VOLC" : " ");
- }
-
- if(!s->scalability){
- if (s->shape!=RECT_SHAPE && s->pict_type!=I_TYPE) {
- skip_bits1(gb); // vop shape coding type
- }
- }else{
- if(s->enhancement_type){
- int load_backward_shape= get_bits1(gb);
- if(load_backward_shape){
- printf("load backward shape isnt supported\n");
- }
- }
- skip_bits(gb, 2); //ref_select_code
- }
- }
- /* detect buggy encoders which dont set the low_delay flag (divx4/xvid/opendivx)*/
- // note we cannot detect divx5 without b-frames easyly (allthough its buggy too)
- if(s->vo_type==0 && s->vol_control_parameters==0 && s->divx_version==0 && s->picture_number==0){
- printf("looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n");
- s->low_delay=1;
- }
-
- s->picture_number++; // better than pic number==0 allways ;)
-
- s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; //FIXME add short header support
- s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
-
- if(s->workaround_bugs&FF_BUG_EDGE){
- s->h_edge_pos= s->width;
- s->v_edge_pos= s->height;
- }
- return 0;
-}
-
-/**
- * decode mpeg4 headers
- * @return <0 if no VOP found (or a damaged one)
- * FRAME_SKIPPED if a not coded VOP is found
- * 0 if a VOP is found
- */
-int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb)
-{
- int startcode, v;
-
- /* search next start code */
- align_get_bits(gb);
- startcode = 0xff;
- for(;;) {
- v = get_bits(gb, 8);
- startcode = ((startcode << 8) | v) & 0xffffffff;
-
- if(get_bits_count(gb) >= gb->size_in_bits){
- if(gb->size_in_bits==8 && s->divx_version){
- printf("frame skip %d\n", gb->size_in_bits);
- return FRAME_SKIPED; //divx bug
- }else
- return -1; //end of stream
- }
-
- if((startcode&0xFFFFFF00) != 0x100)
- continue; //no startcode
-
- if(s->avctx->debug&FF_DEBUG_STARTCODE){
- printf("startcode: %3X ", startcode);
- if (startcode<=0x11F) printf("Video Object Start");
- else if(startcode<=0x12F) printf("Video Object Layer Start");
- else if(startcode<=0x13F) printf("Reserved");
- else if(startcode<=0x15F) printf("FGS bp start");
- else if(startcode<=0x1AF) printf("Reserved");
- else if(startcode==0x1B0) printf("Visual Object Seq Start");
- else if(startcode==0x1B1) printf("Visual Object Seq End");
- else if(startcode==0x1B2) printf("User Data");
- else if(startcode==0x1B3) printf("Group of VOP start");
- else if(startcode==0x1B4) printf("Video Session Error");
- else if(startcode==0x1B5) printf("Visual Object Start");
- else if(startcode==0x1B6) printf("Video Object Plane start");
- else if(startcode==0x1B7) printf("slice start");
- else if(startcode==0x1B8) printf("extension start");
- else if(startcode==0x1B9) printf("fgs start");
- else if(startcode==0x1BA) printf("FBA Object start");
- else if(startcode==0x1BB) printf("FBA Object Plane start");
- else if(startcode==0x1BC) printf("Mesh Object start");
- else if(startcode==0x1BD) printf("Mesh Object Plane start");
- else if(startcode==0x1BE) printf("Still Textutre Object start");
- else if(startcode==0x1BF) printf("Textutre Spatial Layer start");
- else if(startcode==0x1C0) printf("Textutre SNR Layer start");
- else if(startcode==0x1C1) printf("Textutre Tile start");
- else if(startcode==0x1C2) printf("Textutre Shape Layer start");
- else if(startcode==0x1C3) printf("stuffing start");
- else if(startcode<=0x1C5) printf("reserved");
- else if(startcode<=0x1FF) printf("System start");
- printf(" at %d\n", get_bits_count(gb));
- }
-
- switch(startcode){
- case 0x120:
- if(decode_vol_header(s, gb) < 0)
- return -1;
- break;
- case USER_DATA_STARTCODE:
- decode_user_data(s, gb);
- break;
- case GOP_STARTCODE:
- mpeg4_decode_gop_header(s, gb);
- break;
- case VOP_STARTCODE:
- return decode_vop_header(s, gb);
- default:
- break;
- }
-
- align_get_bits(gb);
- startcode = 0xff;
- }
-}
-
-/* don't understand why they choose a different header ! */
-int intel_h263_decode_picture_header(MpegEncContext *s)
-{
- int format;
-
- /* picture header */
- if (get_bits_long(&s->gb, 22) != 0x20) {
- fprintf(stderr, "Bad picture start code\n");
- return -1;
- }
- s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
-
- if (get_bits1(&s->gb) != 1) {
- fprintf(stderr, "Bad marker\n");
- return -1; /* marker */
- }
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "Bad H263 id\n");
- return -1; /* h263 id */
- }
- skip_bits1(&s->gb); /* split screen off */
- skip_bits1(&s->gb); /* camera off */
- skip_bits1(&s->gb); /* freeze picture release off */
-
- format = get_bits(&s->gb, 3);
- if (format != 7) {
- fprintf(stderr, "Intel H263 free format not supported\n");
- return -1;
- }
- s->h263_plus = 0;
-
- s->pict_type = I_TYPE + get_bits1(&s->gb);
-
- s->unrestricted_mv = get_bits1(&s->gb);
- s->h263_long_vectors = s->unrestricted_mv;
-
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "SAC not supported\n");
- return -1; /* SAC: off */
- }
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "Advanced Prediction Mode not supported\n");
- return -1; /* advanced prediction mode: off */
- }
- if (get_bits1(&s->gb) != 0) {
- fprintf(stderr, "PB frame mode no supported\n");
- return -1; /* PB frame mode */
- }
-
- /* skip unknown header garbage */
- skip_bits(&s->gb, 41);
-
- s->qscale = get_bits(&s->gb, 5);
- skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */
-
- /* PEI */
- while (get_bits1(&s->gb) != 0) {
- skip_bits(&s->gb, 8);
- }
- s->f_code = 1;
-
- s->y_dc_scale_table=
- s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
-
- return 0;
-}
-
-int flv_h263_decode_picture_header(MpegEncContext *s)
-{
- int format, width, height;
-
- /* picture header */
- if (get_bits_long(&s->gb, 17) != 1) {
- fprintf(stderr, "Bad picture start code\n");
- return -1;
- }
- format = get_bits(&s->gb, 5);
- if (format != 0 && format != 1) {
- fprintf(stderr, "Bad picture format\n");
- return -1;
- }
- s->h263_flv = format+1;
- s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
- format = get_bits(&s->gb, 3);
- switch (format) {
- case 0:
- width = get_bits(&s->gb, 8);
- height = get_bits(&s->gb, 8);
- break;
- case 1:
- width = get_bits(&s->gb, 16);
- height = get_bits(&s->gb, 16);
- break;
- case 2:
- width = 352;
- height = 288;
- break;
- case 3:
- width = 176;
- height = 144;
- break;
- case 4:
- width = 128;
- height = 96;
- break;
- case 5:
- width = 320;
- height = 240;
- break;
- case 6:
- width = 160;
- height = 120;
- break;
- default:
- width = height = 0;
- break;
- }
- if ((width == 0) || (height == 0))
- return -1;
- s->width = width;
- s->height = height;
-
- s->pict_type = I_TYPE + get_bits(&s->gb, 2);
- if (s->pict_type > P_TYPE)
- s->pict_type = P_TYPE;
- skip_bits1(&s->gb); /* deblocking flag */
- s->qscale = get_bits(&s->gb, 5);
-
- s->h263_plus = 0;
-
- s->unrestricted_mv = 1;
- s->h263_long_vectors = 0;
-
- /* PEI */
- while (get_bits1(&s->gb) != 0) {
- skip_bits(&s->gb, 8);
- }
- s->f_code = 1;
-
- if(s->avctx->debug & FF_DEBUG_PICT_INFO){
- printf("%c esc_type:%d, qp:%d num:%d\n",
- av_get_pict_type_char(s->pict_type), s->h263_flv-1, s->qscale, s->picture_number);
- }
-
- s->y_dc_scale_table=
- s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
-
- return 0;
-}
projects / synfig.git / blobdiff