+++ /dev/null
-/*
- * MPEG1 codec / MPEG2 decoder
- * Copyright (c) 2000,2001 Fabrice Bellard.
- *
- * 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
- */
-
-/**
- * @file mpeg12.c
- * MPEG1/2 codec
- */
-
-//#define DEBUG
-#include "avcodec.h"
-#include "dsputil.h"
-#include "mpegvideo.h"
-
-#include "mpeg12data.h"
-
-
-/* Start codes. */
-#define SEQ_END_CODE 0x000001b7
-#define SEQ_START_CODE 0x000001b3
-#define GOP_START_CODE 0x000001b8
-#define PICTURE_START_CODE 0x00000100
-#define SLICE_MIN_START_CODE 0x00000101
-#define SLICE_MAX_START_CODE 0x000001af
-#define EXT_START_CODE 0x000001b5
-#define USER_START_CODE 0x000001b2
-
-#define DC_VLC_BITS 9
-#define MV_VLC_BITS 9
-#define MBINCR_VLC_BITS 9
-#define MB_PAT_VLC_BITS 9
-#define MB_PTYPE_VLC_BITS 6
-#define MB_BTYPE_VLC_BITS 6
-#define TEX_VLC_BITS 9
-
-static void mpeg1_encode_block(MpegEncContext *s,
- DCTELEM *block,
- int component);
-static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
-static void mpeg1_skip_picture(MpegEncContext *s, int pict_num);
-static inline int mpeg1_decode_block_inter(MpegEncContext *s,
- DCTELEM *block,
- int n);
-static inline int mpeg1_decode_block_intra(MpegEncContext *s,
- DCTELEM *block,
- int n);
-static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
- DCTELEM *block,
- int n);
-static inline int mpeg2_decode_block_intra(MpegEncContext *s,
- DCTELEM *block,
- int n);
-static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
-
-#ifdef HAVE_XVMC
-extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx);
-extern int XVMC_field_end(MpegEncContext *s);
-#endif
-
-#ifdef CONFIG_ENCODERS
-static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
-static uint8_t fcode_tab[MAX_MV*2+1];
-
-static uint32_t uni_mpeg1_ac_vlc_bits[64*64*2];
-static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
-
-/* simple include everything table for dc, first byte is bits number next 3 are code*/
-static uint32_t mpeg1_lum_dc_uni[512];
-static uint32_t mpeg1_chr_dc_uni[512];
-
-static uint8_t mpeg1_index_run[2][64];
-static int8_t mpeg1_max_level[2][64];
-#endif
-
-static void init_2d_vlc_rl(RLTable *rl)
-{
- int i;
-
- init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2,
- &rl->table_vlc[0][1], 4, 2,
- &rl->table_vlc[0][0], 4, 2);
-
-
- rl->rl_vlc[0]= 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= 65;
- level= MAX_LEVEL;
- }else if(len<0){ //more bits needed
- run= 0;
- level= code;
- }else{
- if(code==rl->n){ //esc
- run= 65;
- level= 0;
- }else if(code==rl->n+1){ //eob
- run= 0;
- level= 127;
- }else{
- run= rl->table_run [code] + 1;
- level= rl->table_level[code];
- }
- }
- rl->rl_vlc[0][i].len= len;
- rl->rl_vlc[0][i].level= level;
- rl->rl_vlc[0][i].run= run;
- }
-}
-
-#ifdef CONFIG_ENCODERS
-static void init_uni_ac_vlc(RLTable *rl, uint32_t *uni_ac_vlc_bits, uint8_t *uni_ac_vlc_len){
- int i;
-
- for(i=0; i<128; i++){
- int level= i-64;
- int run;
- for(run=0; run<64; run++){
- int len, bits, code;
-
- int alevel= ABS(level);
- int sign= (level>>31)&1;
-
- if (alevel > rl->max_level[0][run])
- code= 111; /*rl->n*/
- else
- code= rl->index_run[0][run] + alevel - 1;
-
- if (code < 111 /* rl->n */) {
- /* store the vlc & sign at once */
- len= mpeg1_vlc[code][1]+1;
- bits= (mpeg1_vlc[code][0]<<1) + sign;
- } else {
- len= mpeg1_vlc[111/*rl->n*/][1]+6;
- bits= mpeg1_vlc[111/*rl->n*/][0]<<6;
-
- bits|= run;
- if (alevel < 128) {
- bits<<=8; len+=8;
- bits|= level & 0xff;
- } else {
- bits<<=16; len+=16;
- bits|= level & 0xff;
- if (level < 0) {
- bits|= 0x8001 + level + 255;
- } else {
- bits|= level & 0xffff;
- }
- }
- }
-
- uni_ac_vlc_bits[UNI_AC_ENC_INDEX(run, i)]= bits;
- uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
- }
- }
-}
-
-static void put_header(MpegEncContext *s, int header)
-{
- align_put_bits(&s->pb);
- put_bits(&s->pb, 16, header>>16);
- put_bits(&s->pb, 16, header&0xFFFF);
-}
-
-/* put sequence header if needed */
-static void mpeg1_encode_sequence_header(MpegEncContext *s)
-{
- unsigned int vbv_buffer_size;
- unsigned int fps, v;
- int n, i;
- uint64_t time_code;
- float best_aspect_error= 1E10;
- float aspect_ratio= s->avctx->aspect_ratio;
- int constraint_parameter_flag;
-
- if(aspect_ratio==0.0) aspect_ratio= s->width / (float)s->height; //pixel aspect 1:1 (VGA)
-
- if (s->current_picture.key_frame) {
- /* mpeg1 header repeated every gop */
- put_header(s, SEQ_START_CODE);
-
- /* search closest frame rate */
- {
- int i, dmin, d;
- s->frame_rate_index = 0;
- dmin = 0x7fffffff;
- for(i=1;i<14;i++) {
- if(s->avctx->strict_std_compliance >= 0 && i>=9) break;
-
- d = abs(MPEG1_FRAME_RATE_BASE*(int64_t)s->avctx->frame_rate/s->avctx->frame_rate_base - frame_rate_tab[i]);
- if (d < dmin) {
- dmin = d;
- s->frame_rate_index = i;
- }
- }
- }
-
- put_bits(&s->pb, 12, s->width);
- put_bits(&s->pb, 12, s->height);
-
- for(i=1; i<15; i++){
- float error= mpeg1_aspect[i] - s->width/(s->height*aspect_ratio);
- error= ABS(error);
-
- if(error < best_aspect_error){
- best_aspect_error= error;
- s->aspect_ratio_info= i;
- }
- }
-
- put_bits(&s->pb, 4, s->aspect_ratio_info);
- put_bits(&s->pb, 4, s->frame_rate_index);
-
- if(s->avctx->rc_max_rate){
- v = (s->avctx->rc_max_rate + 399) / 400;
- if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
- v = 0x3ffff;
- }else{
- v= 0x3FFFF;
- }
-
- if(s->avctx->rc_buffer_size)
- vbv_buffer_size = s->avctx->rc_buffer_size;
- else
- /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
- vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
- vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
-
- put_bits(&s->pb, 18, v & 0x3FFFF);
- put_bits(&s->pb, 1, 1); /* marker */
- put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
-
- constraint_parameter_flag=
- s->width <= 768 && s->height <= 576 &&
- s->mb_width * s->mb_height <= 396 &&
- s->mb_width * s->mb_height * frame_rate_tab[s->frame_rate_index] <= MPEG1_FRAME_RATE_BASE*396*25 &&
- frame_rate_tab[s->frame_rate_index] <= MPEG1_FRAME_RATE_BASE*30 &&
- vbv_buffer_size <= 20 &&
- v <= 1856000/400 &&
- s->codec_id == CODEC_ID_MPEG1VIDEO;
-
- put_bits(&s->pb, 1, constraint_parameter_flag);
-
- ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
- ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
-
- if(s->codec_id == CODEC_ID_MPEG2VIDEO){
- put_header(s, EXT_START_CODE);
- put_bits(&s->pb, 4, 1); //seq ext
- put_bits(&s->pb, 1, 0); //esc
- put_bits(&s->pb, 3, 4); //profile
- put_bits(&s->pb, 4, 8); //level
- put_bits(&s->pb, 1, s->progressive_sequence=1);
- put_bits(&s->pb, 2, 1); //chroma format 4:2:0
- put_bits(&s->pb, 2, 0); //horizontal size ext
- put_bits(&s->pb, 2, 0); //vertical size ext
- put_bits(&s->pb, 12, v>>18); //bitrate ext
- put_bits(&s->pb, 1, 1); //marker
- put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
- put_bits(&s->pb, 1, s->low_delay);
- put_bits(&s->pb, 2, 0); // frame_rate_ext_n
- put_bits(&s->pb, 5, 0); // frame_rate_ext_d
- }
-
- put_header(s, GOP_START_CODE);
- put_bits(&s->pb, 1, 0); /* do drop frame */
- /* time code : we must convert from the real frame rate to a
- fake mpeg frame rate in case of low frame rate */
- fps = frame_rate_tab[s->frame_rate_index];
- time_code = (int64_t)s->fake_picture_number * MPEG1_FRAME_RATE_BASE;
- s->gop_picture_number = s->fake_picture_number;
- put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
- put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
- put_bits(&s->pb, 1, 1);
- put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
- put_bits(&s->pb, 6, (uint32_t)((time_code % fps) / MPEG1_FRAME_RATE_BASE));
- put_bits(&s->pb, 1, 0); /* closed gop */
- put_bits(&s->pb, 1, 0); /* broken link */
- }
-
- if (s->avctx->frame_rate < (24 * s->avctx->frame_rate_base) && s->picture_number > 0) {
- /* insert empty P pictures to slow down to the desired
- frame rate. Each fake pictures takes about 20 bytes */
- fps = frame_rate_tab[s->frame_rate_index];
- n = av_rescale((int64_t)s->picture_number * s->avctx->frame_rate_base, fps, s->avctx->frame_rate) / MPEG1_FRAME_RATE_BASE - 1;
- while (s->fake_picture_number < n) {
- mpeg1_skip_picture(s, s->fake_picture_number -
- s->gop_picture_number);
- s->fake_picture_number++;
- }
-
- }
-}
-
-static inline void encode_mb_skip_run(MpegEncContext *s, int run){
- while (run >= 33) {
- put_bits(&s->pb, 11, 0x008);
- run -= 33;
- }
- put_bits(&s->pb, mbAddrIncrTable[run][1],
- mbAddrIncrTable[run][0]);
-}
-
-/* insert a fake P picture */
-static void mpeg1_skip_picture(MpegEncContext *s, int pict_num)
-{
- assert(s->codec_id == CODEC_ID_MPEG1VIDEO); // mpeg2 can do these repeat things
-
- /* mpeg1 picture header */
- put_header(s, PICTURE_START_CODE);
- /* temporal reference */
- put_bits(&s->pb, 10, pict_num & 0x3ff);
-
- put_bits(&s->pb, 3, P_TYPE);
- put_bits(&s->pb, 16, 0xffff); /* non constant bit rate */
-
- put_bits(&s->pb, 1, 1); /* integer coordinates */
- put_bits(&s->pb, 3, 1); /* forward_f_code */
-
- put_bits(&s->pb, 1, 0); /* extra bit picture */
-
- /* only one slice */
- put_header(s, SLICE_MIN_START_CODE);
- put_bits(&s->pb, 5, 1); /* quantizer scale */
- put_bits(&s->pb, 1, 0); /* slice extra information */
-
- encode_mb_skip_run(s, 0);
-
- /* empty macroblock */
- put_bits(&s->pb, 3, 1); /* motion only */
-
- /* zero motion x & y */
- put_bits(&s->pb, 1, 1);
- put_bits(&s->pb, 1, 1);
-
- /* output a number of empty slice */
- encode_mb_skip_run(s, s->mb_width * s->mb_height - 2);
-
- /* empty macroblock */
- put_bits(&s->pb, 3, 1); /* motion only */
-
- /* zero motion x & y */
- put_bits(&s->pb, 1, 1);
- put_bits(&s->pb, 1, 1);
-}
-#endif
-
-static void common_init(MpegEncContext *s)
-{
- s->y_dc_scale_table=
- s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
-}
-
-void ff_mpeg1_clean_buffers(MpegEncContext *s){
- s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
- s->last_dc[1] = s->last_dc[0];
- s->last_dc[2] = s->last_dc[0];
- memset(s->last_mv, 0, sizeof(s->last_mv));
-}
-
-#ifdef CONFIG_ENCODERS
-
-void ff_mpeg1_encode_slice_header(MpegEncContext *s){
- put_header(s, SLICE_MIN_START_CODE + s->mb_y);
- put_bits(&s->pb, 5, s->qscale); /* quantizer scale */
- put_bits(&s->pb, 1, 0); /* slice extra information */
-}
-
-void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
-{
- mpeg1_encode_sequence_header(s);
-
- /* mpeg1 picture header */
- put_header(s, PICTURE_START_CODE);
- /* temporal reference */
-
- // RAL: s->picture_number instead of s->fake_picture_number
- put_bits(&s->pb, 10, (s->picture_number -
- s->gop_picture_number) & 0x3ff);
- s->fake_picture_number++;
-
- put_bits(&s->pb, 3, s->pict_type);
- put_bits(&s->pb, 16, 0xffff); /* non constant bit rate */
-
- // RAL: Forward f_code also needed for B frames
- if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
- put_bits(&s->pb, 1, 0); /* half pel coordinates */
- if(s->codec_id == CODEC_ID_MPEG1VIDEO)
- put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
- else
- put_bits(&s->pb, 3, 7); /* forward_f_code */
- }
-
- // RAL: Backward f_code necessary for B frames
- if (s->pict_type == B_TYPE) {
- put_bits(&s->pb, 1, 0); /* half pel coordinates */
- if(s->codec_id == CODEC_ID_MPEG1VIDEO)
- put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
- else
- put_bits(&s->pb, 3, 7); /* backward_f_code */
- }
-
- put_bits(&s->pb, 1, 0); /* extra bit picture */
-
- if(s->codec_id == CODEC_ID_MPEG2VIDEO){
- put_header(s, EXT_START_CODE);
- put_bits(&s->pb, 4, 8); //pic ext
- if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
- put_bits(&s->pb, 4, s->f_code);
- put_bits(&s->pb, 4, s->f_code);
- }else{
- put_bits(&s->pb, 8, 255);
- }
- if (s->pict_type == B_TYPE) {
- put_bits(&s->pb, 4, s->b_code);
- put_bits(&s->pb, 4, s->b_code);
- }else{
- put_bits(&s->pb, 8, 255);
- }
- put_bits(&s->pb, 2, s->intra_dc_precision);
- put_bits(&s->pb, 2, s->picture_structure= PICT_FRAME);
- put_bits(&s->pb, 1, s->top_field_first);
- put_bits(&s->pb, 1, s->frame_pred_frame_dct= 1);
- put_bits(&s->pb, 1, s->concealment_motion_vectors);
- put_bits(&s->pb, 1, s->q_scale_type);
- put_bits(&s->pb, 1, s->intra_vlc_format);
- put_bits(&s->pb, 1, s->alternate_scan);
- put_bits(&s->pb, 1, s->repeat_first_field);
- put_bits(&s->pb, 1, s->chroma_420_type=1);
- put_bits(&s->pb, 1, s->progressive_frame=1);
- put_bits(&s->pb, 1, 0); //composite_display_flag
- }
-
- s->mb_y=0;
- ff_mpeg1_encode_slice_header(s);
-}
-
-void mpeg1_encode_mb(MpegEncContext *s,
- DCTELEM block[6][64],
- int motion_x, int motion_y)
-{
- int i, cbp;
- const int mb_x = s->mb_x;
- const int mb_y = s->mb_y;
- const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
-
- /* compute cbp */
- cbp = 0;
- for(i=0;i<6;i++) {
- if (s->block_last_index[i] >= 0)
- cbp |= 1 << (5 - i);
- }
-
- if (cbp == 0 && !first_mb && (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
- ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) ||
- (s->pict_type == B_TYPE && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
- ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
- s->mb_skip_run++;
- s->qscale -= s->dquant;
- s->skip_count++;
- s->misc_bits++;
- s->last_bits++;
- } else {
- if(first_mb){
- assert(s->mb_skip_run == 0);
- encode_mb_skip_run(s, s->mb_x);
- }else{
- encode_mb_skip_run(s, s->mb_skip_run);
- }
-
- if (s->pict_type == I_TYPE) {
- if(s->dquant && cbp){
- put_bits(&s->pb, 2, 1); /* macroblock_type : macroblock_quant = 1 */
- put_bits(&s->pb, 5, s->qscale);
- }else{
- put_bits(&s->pb, 1, 1); /* macroblock_type : macroblock_quant = 0 */
- s->qscale -= s->dquant;
- }
- s->misc_bits+= get_bits_diff(s);
- s->i_count++;
- } else if (s->mb_intra) {
- if(s->dquant && cbp){
- put_bits(&s->pb, 6, 0x01);
- put_bits(&s->pb, 5, s->qscale);
- }else{
- put_bits(&s->pb, 5, 0x03);
- s->qscale -= s->dquant;
- }
- s->misc_bits+= get_bits_diff(s);
- s->i_count++;
- s->last_mv[0][0][0] =
- s->last_mv[0][0][1] = 0;
- } else if (s->pict_type == P_TYPE) {
- if (cbp != 0) {
- if (motion_x == 0 && motion_y == 0) {
- if(s->dquant){
- put_bits(&s->pb, 5, 1); /* macroblock_pattern & quant */
- put_bits(&s->pb, 5, s->qscale);
- }else{
- put_bits(&s->pb, 2, 1); /* macroblock_pattern only */
- }
- s->misc_bits+= get_bits_diff(s);
- put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
- } else {
- if(s->dquant){
- put_bits(&s->pb, 5, 2); /* motion + cbp */
- put_bits(&s->pb, 5, s->qscale);
- }else{
- put_bits(&s->pb, 1, 1); /* motion + cbp */
- }
- s->misc_bits+= get_bits_diff(s);
- mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
- mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
- s->mv_bits+= get_bits_diff(s);
- put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
- }
- } else {
- put_bits(&s->pb, 3, 1); /* motion only */
- mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
- mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
- s->qscale -= s->dquant;
- s->mv_bits+= get_bits_diff(s);
- }
- s->f_count++;
- } else
- { // RAL: All the following bloc added for B frames:
- if (cbp != 0)
- { // With coded bloc pattern
- if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD))
- { // Bi-directional motion
- if (s->dquant)
- { // With QScale
- put_bits(&s->pb, 5, 2);
- put_bits(&s->pb, 5, s->qscale);
- }
- else // Without QScale
- put_bits(&s->pb, 2, 3);
- s->misc_bits += get_bits_diff(s);
- mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
- mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
- mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
- mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
- s->b_count++;
- s->f_count++;
- s->mv_bits += get_bits_diff(s);
- put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
- }
- else if (s->mv_dir == MV_DIR_BACKWARD)
- { // Backward motion
- if (s->dquant)
- { // With QScale
- put_bits(&s->pb, 6, 2);
- put_bits(&s->pb, 5, s->qscale);
- }
- else // Without QScale
- put_bits(&s->pb, 3, 3);
- s->misc_bits += get_bits_diff(s);
- mpeg1_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code);
- mpeg1_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code);
- s->b_count++;
- s->mv_bits += get_bits_diff(s);
- put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
- }
- else if (s->mv_dir == MV_DIR_FORWARD)
- { // Forward motion
- if (s->dquant)
- { // With QScale
- put_bits(&s->pb, 6, 3);
- put_bits(&s->pb, 5, s->qscale);
- }
- else // Without QScale
- put_bits(&s->pb, 4, 3);
- s->misc_bits += get_bits_diff(s);
- mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
- mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
- s->f_count++;
- s->mv_bits += get_bits_diff(s);
- put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
- }
- }
- else
- { // No coded bloc pattern
- if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD))
- { // Bi-directional motion
- put_bits(&s->pb, 2, 2); /* backward & forward motion */
- mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
- mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
- mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
- mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
- s->b_count++;
- s->f_count++;
- }
- else if (s->mv_dir == MV_DIR_BACKWARD)
- { // Backward motion
- put_bits(&s->pb, 3, 2); /* backward motion only */
- mpeg1_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code);
- mpeg1_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code);
- s->b_count++;
- }
- else if (s->mv_dir == MV_DIR_FORWARD)
- { // Forward motion
- put_bits(&s->pb, 4, 2); /* forward motion only */
- mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
- mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
- s->f_count++;
- }
- s->qscale -= s->dquant;
- s->mv_bits += get_bits_diff(s);
- }
- // End of bloc from RAL
- }
- for(i=0;i<6;i++) {
- if (cbp & (1 << (5 - i))) {
- mpeg1_encode_block(s, block[i], i);
- }
- }
- s->mb_skip_run = 0;
- if(s->mb_intra)
- s->i_tex_bits+= get_bits_diff(s);
- else
- s->p_tex_bits+= get_bits_diff(s);
- }
-
- // RAL: By this:
- if (s->mv_dir & MV_DIR_FORWARD)
- {
- s->last_mv[0][0][0]= s->mv[0][0][0];
- s->last_mv[0][0][1]= s->mv[0][0][1];
- }
- if (s->mv_dir & MV_DIR_BACKWARD)
- {
- s->last_mv[1][0][0]= s->mv[1][0][0];
- s->last_mv[1][0][1]= s->mv[1][0][1];
- }
-}
-
-// RAL: Parameter added: f_or_b_code
-static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
-{
- int code, bit_size, l, m, bits, range, sign;
-
- if (val == 0) {
- /* zero vector */
- code = 0;
- put_bits(&s->pb,
- mbMotionVectorTable[0][1],
- mbMotionVectorTable[0][0]);
- } else {
- bit_size = f_or_b_code - 1;
- range = 1 << bit_size;
- /* modulo encoding */
- l = 16 * range;
- m = 2 * l;
- if (val < -l) {
- val += m;
- } else if (val >= l) {
- val -= m;
- }
-
- if (val >= 0) {
- val--;
- code = (val >> bit_size) + 1;
- bits = val & (range - 1);
- sign = 0;
- } else {
- val = -val;
- val--;
- code = (val >> bit_size) + 1;
- bits = val & (range - 1);
- sign = 1;
- }
-
- assert(code > 0 && code <= 16);
-
- put_bits(&s->pb,
- mbMotionVectorTable[code][1],
- mbMotionVectorTable[code][0]);
-
- put_bits(&s->pb, 1, sign);
- if (bit_size > 0) {
- put_bits(&s->pb, bit_size, bits);
- }
- }
-}
-
-void ff_mpeg1_encode_init(MpegEncContext *s)
-{
- static int done=0;
-
- common_init(s);
-
- if(!done){
- int f_code;
- int mv;
- int i;
-
- done=1;
- init_rl(&rl_mpeg1);
-
- for(i=0; i<64; i++)
- {
- mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
- mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
- }
-
- init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_bits, uni_mpeg1_ac_vlc_len);
-
- /* build unified dc encoding tables */
- for(i=-255; i<256; i++)
- {
- int adiff, index;
- int bits, code;
- int diff=i;
-
- adiff = ABS(diff);
- if(diff<0) diff--;
- index = vlc_dc_table[adiff];
-
- bits= vlc_dc_lum_bits[index] + index;
- code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
- mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
-
- bits= vlc_dc_chroma_bits[index] + index;
- code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
- mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
- }
-
- 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= mbMotionVectorTable[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<17){
- len= mbMotionVectorTable[code][1] + 1 + bit_size;
- }else{
- len= mbMotionVectorTable[16][1] + 2 + bit_size;
- }
- }
-
- mv_penalty[f_code][mv+MAX_MV]= len;
- }
- }
-
-
- for(f_code=MAX_FCODE; f_code>0; f_code--){
- for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
- fcode_tab[mv+MAX_MV]= f_code;
- }
- }
- }
- s->me.mv_penalty= mv_penalty;
- s->fcode_tab= fcode_tab;
- if(s->codec_id == CODEC_ID_MPEG1VIDEO){
- s->min_qcoeff=-255;
- s->max_qcoeff= 255;
- }else{
- s->min_qcoeff=-2047;
- s->max_qcoeff= 2047;
- }
- s->intra_ac_vlc_length=
- s->inter_ac_vlc_length= uni_mpeg1_ac_vlc_len;
-}
-
-static inline void encode_dc(MpegEncContext *s, int diff, int component)
-{
- if (component == 0) {
- put_bits(
- &s->pb,
- mpeg1_lum_dc_uni[diff+255]&0xFF,
- mpeg1_lum_dc_uni[diff+255]>>8);
- } else {
- put_bits(
- &s->pb,
- mpeg1_chr_dc_uni[diff+255]&0xFF,
- mpeg1_chr_dc_uni[diff+255]>>8);
- }
-}
-
-static void mpeg1_encode_block(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
- int code, component;
-// RLTable *rl = &rl_mpeg1;
-
- last_index = s->block_last_index[n];
-
- /* DC coef */
- if (s->mb_intra) {
- component = (n <= 3 ? 0 : n - 4 + 1);
- dc = block[0]; /* overflow is impossible */
- diff = dc - s->last_dc[component];
- encode_dc(s, diff, component);
- s->last_dc[component] = dc;
- i = 1;
-/*
- if (s->intra_vlc_format)
- rl = &rl_mpeg2;
- else
- rl = &rl_mpeg1;
-*/
- } else {
- /* encode the first coefficient : needs to be done here because
- it is handled slightly differently */
- level = block[0];
- if (abs(level) == 1) {
- code = ((uint32_t)level >> 31); /* the sign bit */
- put_bits(&s->pb, 2, code | 0x02);
- i = 1;
- } else {
- i = 0;
- last_non_zero = -1;
- goto next_coef;
- }
- }
-
- /* now quantify & encode AC coefs */
- last_non_zero = i - 1;
-
- for(;i<=last_index;i++) {
- j = s->intra_scantable.permutated[i];
- level = block[j];
- next_coef:
-#if 0
- if (level != 0)
- dprintf("level[%d]=%d\n", i, level);
-#endif
- /* encode using VLC */
- if (level != 0) {
- run = i - last_non_zero - 1;
-
- alevel= level;
- MASK_ABS(sign, alevel)
- sign&=1;
-
-// code = get_rl_index(rl, 0, run, alevel);
- if (alevel <= mpeg1_max_level[0][run]){
- code= mpeg1_index_run[0][run] + alevel - 1;
- /* store the vlc & sign at once */
- put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign);
- } else {
- /* escape seems to be pretty rare <5% so i dont optimize it */
- put_bits(&s->pb, mpeg1_vlc[111/*rl->n*/][1], mpeg1_vlc[111/*rl->n*/][0]);
- /* escape: only clip in this case */
- put_bits(&s->pb, 6, run);
- if(s->codec_id == CODEC_ID_MPEG1VIDEO){
- if (alevel < 128) {
- put_bits(&s->pb, 8, level & 0xff);
- } else {
- if (level < 0) {
- put_bits(&s->pb, 16, 0x8001 + level + 255);
- } else {
- put_bits(&s->pb, 16, level & 0xffff);
- }
- }
- }else{
- put_bits(&s->pb, 12, level & 0xfff);
- }
- }
- last_non_zero = i;
- }
- }
- /* end of block */
- put_bits(&s->pb, 2, 0x2);
-}
-#endif //CONFIG_ENCODERS
-
-/******************************************/
-/* decoding */
-
-static VLC dc_lum_vlc;
-static VLC dc_chroma_vlc;
-static VLC mv_vlc;
-static VLC mbincr_vlc;
-static VLC mb_ptype_vlc;
-static VLC mb_btype_vlc;
-static VLC mb_pat_vlc;
-
-static void init_vlcs()
-{
- static int done = 0;
-
- if (!done) {
- done = 1;
-
- init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
- vlc_dc_lum_bits, 1, 1,
- vlc_dc_lum_code, 2, 2);
- init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
- vlc_dc_chroma_bits, 1, 1,
- vlc_dc_chroma_code, 2, 2);
- init_vlc(&mv_vlc, MV_VLC_BITS, 17,
- &mbMotionVectorTable[0][1], 2, 1,
- &mbMotionVectorTable[0][0], 2, 1);
- init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
- &mbAddrIncrTable[0][1], 2, 1,
- &mbAddrIncrTable[0][0], 2, 1);
- init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 63,
- &mbPatTable[0][1], 2, 1,
- &mbPatTable[0][0], 2, 1);
-
- init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
- &table_mb_ptype[0][1], 2, 1,
- &table_mb_ptype[0][0], 2, 1);
- init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
- &table_mb_btype[0][1], 2, 1,
- &table_mb_btype[0][0], 2, 1);
- init_rl(&rl_mpeg1);
- init_rl(&rl_mpeg2);
-
- init_2d_vlc_rl(&rl_mpeg1);
- init_2d_vlc_rl(&rl_mpeg2);
- }
-}
-
-static inline int get_dmv(MpegEncContext *s)
-{
- if(get_bits1(&s->gb))
- return 1 - (get_bits1(&s->gb) << 1);
- else
- return 0;
-}
-
-static inline int get_qscale(MpegEncContext *s)
-{
- int qscale = get_bits(&s->gb, 5);
- if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
- if (s->q_scale_type) {
- return non_linear_qscale[qscale];
- } else {
- return qscale << 1;
- }
- }
- return qscale;
-}
-
-/* motion type (for mpeg2) */
-#define MT_FIELD 1
-#define MT_FRAME 2
-#define MT_16X8 2
-#define MT_DMV 3
-
-static int mpeg_decode_mb(MpegEncContext *s,
- DCTELEM block[6][64])
-{
- int i, j, k, cbp, val, mb_type, motion_type;
-
- dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
-
- assert(s->mb_skiped==0);
-
- if (s->mb_skip_run-- != 0) {
- if(s->pict_type == I_TYPE){
- fprintf(stderr, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- /* skip mb */
- s->mb_intra = 0;
- for(i=0;i<6;i++)
- s->block_last_index[i] = -1;
- s->mv_type = MV_TYPE_16X16;
- if (s->pict_type == P_TYPE) {
- /* if P type, zero motion vector is implied */
- s->mv_dir = MV_DIR_FORWARD;
- s->mv[0][0][0] = s->mv[0][0][1] = 0;
- s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
- s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
- s->mb_skiped = 1;
- s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
- } else {
- /* if B type, reuse previous vectors and directions */
- s->mv[0][0][0] = s->last_mv[0][0][0];
- s->mv[0][0][1] = s->last_mv[0][0][1];
- s->mv[1][0][0] = s->last_mv[1][0][0];
- s->mv[1][0][1] = s->last_mv[1][0][1];
-
- s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
- s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | MB_TYPE_SKIP;
-// assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
-
- if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
- s->mb_skiped = 1;
- }
-
- return 0;
- }
-
- switch(s->pict_type) {
- default:
- case I_TYPE:
- if (get_bits1(&s->gb) == 0) {
- if (get_bits1(&s->gb) == 0){
- fprintf(stderr, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
- } else {
- mb_type = MB_TYPE_INTRA;
- }
- break;
- case P_TYPE:
- mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
- if (mb_type < 0){
- fprintf(stderr, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- mb_type = ptype2mb_type[ mb_type ];
- break;
- case B_TYPE:
- mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
- if (mb_type < 0){
- fprintf(stderr, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- mb_type = btype2mb_type[ mb_type ];
- break;
- }
- dprintf("mb_type=%x\n", mb_type);
-// motion_type = 0; /* avoid warning */
- if (IS_INTRA(mb_type)) {
- /* compute dct type */
- if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
- !s->frame_pred_frame_dct) {
- s->interlaced_dct = get_bits1(&s->gb);
- }
-
- if (IS_QUANT(mb_type))
- s->qscale = get_qscale(s);
-
- if (s->concealment_motion_vectors) {
- /* just parse them */
- if (s->picture_structure != PICT_FRAME)
- skip_bits1(&s->gb); /* field select */
-
- s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
- mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
- s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
- mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
-
- skip_bits1(&s->gb); /* marker */
- }else
- memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
- s->mb_intra = 1;
-
- if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
- for(i=0;i<6;i++) {
- if (mpeg2_decode_block_intra(s, block[i], i) < 0)
- return -1;
- }
- } else {
- for(i=0;i<6;i++) {
- if (mpeg1_decode_block_intra(s, block[i], i) < 0)
- return -1;
- }
- }
- } else {
- if (mb_type & MB_TYPE_ZERO_MV){
- assert(mb_type & MB_TYPE_PAT);
-
- /* compute dct type */
- if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
- !s->frame_pred_frame_dct) {
- s->interlaced_dct = get_bits1(&s->gb);
- }
-
- if (IS_QUANT(mb_type))
- s->qscale = get_qscale(s);
-
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- s->last_mv[0][0][0] = 0;
- s->last_mv[0][0][1] = 0;
- s->last_mv[0][1][0] = 0;
- s->last_mv[0][1][1] = 0;
- s->mv[0][0][0] = 0;
- s->mv[0][0][1] = 0;
- }else{
- assert(mb_type & MB_TYPE_L0L1);
-//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
- /* get additionnal motion vector type */
- if (s->frame_pred_frame_dct)
- motion_type = MT_FRAME;
- else{
- motion_type = get_bits(&s->gb, 2);
- }
-
- /* compute dct type */
- if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
- !s->frame_pred_frame_dct && IS_PAT(mb_type)) {
- s->interlaced_dct = get_bits1(&s->gb);
- }
-
- if (IS_QUANT(mb_type))
- s->qscale = get_qscale(s);
-
- /* motion vectors */
- s->mv_dir = 0;
- for(i=0;i<2;i++) {
- if (USES_LIST(mb_type, i)) {
- s->mv_dir |= (MV_DIR_FORWARD >> i);
- dprintf("motion_type=%d\n", motion_type);
- switch(motion_type) {
- case MT_FRAME: /* or MT_16X8 */
- if (s->picture_structure == PICT_FRAME) {
- /* MT_FRAME */
- mb_type |= MB_TYPE_16x16;
- s->mv_type = MV_TYPE_16X16;
- s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
- mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
- s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
- mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
- /* full_pel: only for mpeg1 */
- if (s->full_pel[i]){
- s->mv[i][0][0] <<= 1;
- s->mv[i][0][1] <<= 1;
- }
- } else {
- /* MT_16X8 */
- mb_type |= MB_TYPE_16x8;
- s->mv_type = MV_TYPE_16X8;
- for(j=0;j<2;j++) {
- s->field_select[i][j] = get_bits1(&s->gb);
- for(k=0;k<2;k++) {
- val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
- s->last_mv[i][j][k]);
- s->last_mv[i][j][k] = val;
- s->mv[i][j][k] = val;
- }
- }
- }
- break;
- case MT_FIELD:
- s->mv_type = MV_TYPE_FIELD;
- if (s->picture_structure == PICT_FRAME) {
- mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
- for(j=0;j<2;j++) {
- s->field_select[i][j] = get_bits1(&s->gb);
- val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
- s->last_mv[i][j][0]);
- s->last_mv[i][j][0] = val;
- s->mv[i][j][0] = val;
- dprintf("fmx=%d\n", val);
- val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
- s->last_mv[i][j][1] >> 1);
- s->last_mv[i][j][1] = val << 1;
- s->mv[i][j][1] = val;
- dprintf("fmy=%d\n", val);
- }
- } else {
- mb_type |= MB_TYPE_16x16;
- s->field_select[i][0] = get_bits1(&s->gb);
- for(k=0;k<2;k++) {
- val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
- s->last_mv[i][0][k]);
- s->last_mv[i][0][k] = val;
- s->last_mv[i][1][k] = val;
- s->mv[i][0][k] = val;
- }
- }
- break;
- case MT_DMV:
- {
- int dmx, dmy, mx, my, m;
-
- mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
- s->last_mv[i][0][0]);
- s->last_mv[i][0][0] = mx;
- s->last_mv[i][1][0] = mx;
- dmx = get_dmv(s);
- my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
- s->last_mv[i][0][1] >> 1);
- dmy = get_dmv(s);
- s->mv_type = MV_TYPE_DMV;
-
-
- s->last_mv[i][0][1] = my<<1;
- s->last_mv[i][1][1] = my<<1;
-
- s->mv[i][0][0] = mx;
- s->mv[i][0][1] = my;
- s->mv[i][1][0] = mx;//not used
- s->mv[i][1][1] = my;//not used
-
- if (s->picture_structure == PICT_FRAME) {
- mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
-
- //m = 1 + 2 * s->top_field_first;
- m = s->top_field_first ? 1 : 3;
-
- /* top -> top pred */
- s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
- s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
- m = 4 - m;
- s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
- s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
- } else {
- mb_type |= MB_TYPE_16x16;
-
- s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
- s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
- if(s->picture_structure == PICT_TOP_FIELD)
- s->mv[i][2][1]--;
- else
- s->mv[i][2][1]++;
- }
- }
- break;
- }
- }
- }
- }
-
- s->mb_intra = 0;
-
- if (IS_PAT(mb_type)) {
- cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
- if (cbp < 0){
- fprintf(stderr, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- cbp++;
-
- if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
- for(i=0;i<6;i++) {
- if (cbp & 32) {
- if (mpeg2_decode_block_non_intra(s, block[i], i) < 0)
- return -1;
- } else {
- s->block_last_index[i] = -1;
- }
- cbp+=cbp;
- }
- } else {
- for(i=0;i<6;i++) {
- if (cbp & 32) {
- if (mpeg1_decode_block_inter(s, block[i], i) < 0)
- return -1;
- } else {
- s->block_last_index[i] = -1;
- }
- cbp+=cbp;
- }
- }
- }else{
- for(i=0;i<6;i++)
- s->block_last_index[i] = -1;
- }
- }
-
- s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
-
- return 0;
-}
-
-/* as h263, but only 17 codes */
-static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
-{
- int code, sign, val, l, shift;
-
- 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 = fcode - 1;
- val = code;
- if (shift) {
- val = (val - 1) << shift;
- val |= get_bits(&s->gb, shift);
- val++;
- }
- if (sign)
- val = -val;
- val += pred;
-
- /* modulo decoding */
- l = 1 << (shift+4);
- val = ((val + l)&(l*2-1)) - l;
- return val;
-}
-
-static inline int decode_dc(GetBitContext *gb, int component)
-{
- int code, diff;
-
- if (component == 0) {
- code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
- } else {
- code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
- }
- if (code < 0){
- fprintf(stderr, "invalid dc code at\n");
- return 0xffff;
- }
- if (code == 0) {
- diff = 0;
- } else {
- diff = get_xbits(gb, code);
- }
- return diff;
-}
-
-static inline int mpeg1_decode_block_intra(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int level, dc, diff, i, j, run;
- int component;
- RLTable *rl = &rl_mpeg1;
- uint8_t * const scantable= s->intra_scantable.permutated;
- const uint16_t *quant_matrix= s->intra_matrix;
- const int qscale= s->qscale;
-
- /* DC coef */
- component = (n <= 3 ? 0 : n - 4 + 1);
- diff = decode_dc(&s->gb, component);
- if (diff >= 0xffff)
- return -1;
- dc = s->last_dc[component];
- dc += diff;
- s->last_dc[component] = dc;
- block[0] = dc<<3;
- dprintf("dc=%d diff=%d\n", dc, diff);
- i = 0;
- {
- OPEN_READER(re, &s->gb);
- /* now quantify & encode AC coefs */
- for(;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
-
- if(level == 127){
- break;
- } else if(level != 0) {
- i += run;
- j = scantable[i];
- level= (level*qscale*quant_matrix[j])>>3;
- level= (level-1)|1;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
- if (level == -128) {
- level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
- } else if (level == 0) {
- level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
- }
- i += run;
- j = scantable[i];
- if(level<0){
- level= -level;
- level= (level*qscale*quant_matrix[j])>>3;
- level= (level-1)|1;
- level= -level;
- }else{
- level= (level*qscale*quant_matrix[j])>>3;
- level= (level-1)|1;
- }
- }
- if (i > 63){
- fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- block[j] = level;
- }
- CLOSE_READER(re, &s->gb);
- }
- s->block_last_index[n] = i;
- return 0;
-}
-
-static inline int mpeg1_decode_block_inter(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int level, i, j, run;
- RLTable *rl = &rl_mpeg1;
- uint8_t * const scantable= s->intra_scantable.permutated;
- const uint16_t *quant_matrix= s->inter_matrix;
- const int qscale= s->qscale;
-
- {
- int v;
- OPEN_READER(re, &s->gb);
- i = -1;
- /* special case for the first coef. no need to add a second vlc table */
- UPDATE_CACHE(re, &s->gb);
- v= SHOW_UBITS(re, &s->gb, 2);
- if (v & 2) {
- LAST_SKIP_BITS(re, &s->gb, 2);
- level= (3*qscale*quant_matrix[0])>>4;
- level= (level-1)|1;
- if(v&1)
- level= -level;
- block[0] = level;
- i++;
- }
-
- /* now quantify & encode AC coefs */
- for(;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
-
- if(level == 127){
- break;
- } else if(level != 0) {
- i += run;
- j = scantable[i];
- level= ((level*2+1)*qscale*quant_matrix[j])>>4;
- level= (level-1)|1;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
- if (level == -128) {
- level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
- } else if (level == 0) {
- level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
- }
- i += run;
- j = scantable[i];
- if(level<0){
- level= -level;
- level= ((level*2+1)*qscale*quant_matrix[j])>>4;
- level= (level-1)|1;
- level= -level;
- }else{
- level= ((level*2+1)*qscale*quant_matrix[j])>>4;
- level= (level-1)|1;
- }
- }
- if (i > 63){
- fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- block[j] = level;
- }
- CLOSE_READER(re, &s->gb);
- }
- s->block_last_index[n] = i;
- return 0;
-}
-
-/* Also does unquantization here, since I will never support mpeg2
- encoding */
-static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int level, i, j, run;
- RLTable *rl = &rl_mpeg1;
- uint8_t * const scantable= s->intra_scantable.permutated;
- const uint16_t *quant_matrix;
- const int qscale= s->qscale;
- int mismatch;
-
- mismatch = 1;
-
- {
- int v;
- OPEN_READER(re, &s->gb);
- i = -1;
- if (n < 4)
- quant_matrix = s->inter_matrix;
- else
- quant_matrix = s->chroma_inter_matrix;
-
- /* special case for the first coef. no need to add a second vlc table */
- UPDATE_CACHE(re, &s->gb);
- v= SHOW_UBITS(re, &s->gb, 2);
- if (v & 2) {
- LAST_SKIP_BITS(re, &s->gb, 2);
- level= (3*qscale*quant_matrix[0])>>5;
- if(v&1)
- level= -level;
- block[0] = level;
- mismatch ^= level;
- i++;
- }
-
- /* now quantify & encode AC coefs */
- for(;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
-
- if(level == 127){
- break;
- } else if(level != 0) {
- i += run;
- j = scantable[i];
- level= ((level*2+1)*qscale*quant_matrix[j])>>5;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
-
- i += run;
- j = scantable[i];
- if(level<0){
- level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
- level= -level;
- }else{
- level= ((level*2+1)*qscale*quant_matrix[j])>>5;
- }
- }
- if (i > 63){
- fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- mismatch ^= level;
- block[j] = level;
- }
- CLOSE_READER(re, &s->gb);
- }
- block[63] ^= (mismatch & 1);
-
- s->block_last_index[n] = i;
- return 0;
-}
-
-static inline int mpeg2_decode_block_intra(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int level, dc, diff, i, j, run;
- int component;
- RLTable *rl;
- uint8_t * const scantable= s->intra_scantable.permutated;
- const uint16_t *quant_matrix;
- const int qscale= s->qscale;
- int mismatch;
-
- /* DC coef */
- if (n < 4){
- quant_matrix = s->intra_matrix;
- component = 0;
- }else{
- quant_matrix = s->chroma_intra_matrix;
- component = n - 3;
- }
- diff = decode_dc(&s->gb, component);
- if (diff >= 0xffff)
- return -1;
- dc = s->last_dc[component];
- dc += diff;
- s->last_dc[component] = dc;
- block[0] = dc << (3 - s->intra_dc_precision);
- dprintf("dc=%d\n", block[0]);
- mismatch = block[0] ^ 1;
- i = 0;
- if (s->intra_vlc_format)
- rl = &rl_mpeg2;
- else
- rl = &rl_mpeg1;
-
- {
- OPEN_READER(re, &s->gb);
- /* now quantify & encode AC coefs */
- for(;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
-
- if(level == 127){
- break;
- } else if(level != 0) {
- i += run;
- j = scantable[i];
- level= (level*qscale*quant_matrix[j])>>4;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
- i += run;
- j = scantable[i];
- if(level<0){
- level= (-level*qscale*quant_matrix[j])>>4;
- level= -level;
- }else{
- level= (level*qscale*quant_matrix[j])>>4;
- }
- }
- if (i > 63){
- fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- mismatch^= level;
- block[j] = level;
- }
- CLOSE_READER(re, &s->gb);
- }
- block[63]^= mismatch&1;
-
- s->block_last_index[n] = i;
- return 0;
-}
-
-typedef struct Mpeg1Context {
- MpegEncContext mpeg_enc_ctx;
- int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
- int repeat_field; /* true if we must repeat the field */
-} Mpeg1Context;
-
-static int mpeg_decode_init(AVCodecContext *avctx)
-{
- Mpeg1Context *s = avctx->priv_data;
-
- s->mpeg_enc_ctx.flags= avctx->flags;
- common_init(&s->mpeg_enc_ctx);
- init_vlcs();
-
- s->mpeg_enc_ctx_allocated = 0;
- s->mpeg_enc_ctx.picture_number = 0;
- s->repeat_field = 0;
- s->mpeg_enc_ctx.codec_id= avctx->codec->id;
- return 0;
-}
-
-/* return the 8 bit start code value and update the search
- state. Return -1 if no start code found */
-static int find_start_code(uint8_t **pbuf_ptr, uint8_t *buf_end)
-{
- uint8_t *buf_ptr;
- unsigned int state=0xFFFFFFFF, v;
- int val;
-
- buf_ptr = *pbuf_ptr;
- while (buf_ptr < buf_end) {
- v = *buf_ptr++;
- if (state == 0x000001) {
- state = ((state << 8) | v) & 0xffffff;
- val = state;
- goto found;
- }
- state = ((state << 8) | v) & 0xffffff;
- }
- val = -1;
- found:
- *pbuf_ptr = buf_ptr;
- return val;
-}
-
-static int mpeg1_decode_picture(AVCodecContext *avctx,
- uint8_t *buf, int buf_size)
-{
- Mpeg1Context *s1 = avctx->priv_data;
- MpegEncContext *s = &s1->mpeg_enc_ctx;
- int ref, f_code;
-
- init_get_bits(&s->gb, buf, buf_size*8);
-
- ref = get_bits(&s->gb, 10); /* temporal ref */
- s->pict_type = get_bits(&s->gb, 3);
- dprintf("pict_type=%d number=%d\n", s->pict_type, s->picture_number);
-
- skip_bits(&s->gb, 16);
- if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
- s->full_pel[0] = get_bits1(&s->gb);
- f_code = get_bits(&s->gb, 3);
- if (f_code == 0)
- return -1;
- s->mpeg_f_code[0][0] = f_code;
- s->mpeg_f_code[0][1] = f_code;
- }
- if (s->pict_type == B_TYPE) {
- s->full_pel[1] = get_bits1(&s->gb);
- f_code = get_bits(&s->gb, 3);
- if (f_code == 0)
- return -1;
- s->mpeg_f_code[1][0] = f_code;
- s->mpeg_f_code[1][1] = f_code;
- }
- s->current_picture.pict_type= s->pict_type;
- s->current_picture.key_frame= s->pict_type == I_TYPE;
-
- s->y_dc_scale = 8;
- s->c_dc_scale = 8;
- s->first_slice = 1;
- return 0;
-}
-
-static void mpeg_decode_sequence_extension(MpegEncContext *s)
-{
- int horiz_size_ext, vert_size_ext;
- int bit_rate_ext, vbv_buf_ext;
- int frame_rate_ext_n, frame_rate_ext_d;
- int level, profile;
- float aspect;
-
- skip_bits(&s->gb, 1); /* profil and level esc*/
- profile= get_bits(&s->gb, 3);
- level= get_bits(&s->gb, 4);
- s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
- skip_bits(&s->gb, 2); /* chroma_format */
- horiz_size_ext = get_bits(&s->gb, 2);
- vert_size_ext = get_bits(&s->gb, 2);
- s->width |= (horiz_size_ext << 12);
- s->height |= (vert_size_ext << 12);
- bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
- s->bit_rate = ((s->bit_rate / 400) | (bit_rate_ext << 12)) * 400;
- skip_bits1(&s->gb); /* marker */
- vbv_buf_ext = get_bits(&s->gb, 8);
-
- s->low_delay = get_bits1(&s->gb);
- if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
-
- frame_rate_ext_n = get_bits(&s->gb, 2);
- frame_rate_ext_d = get_bits(&s->gb, 5);
- av_reduce(
- &s->avctx->frame_rate,
- &s->avctx->frame_rate_base,
- frame_rate_tab[s->frame_rate_index] * (frame_rate_ext_n+1),
- MPEG1_FRAME_RATE_BASE * (frame_rate_ext_d+1),
- 1<<30);
-
- dprintf("sequence extension\n");
- s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
- s->avctx->sub_id = 2; /* indicates mpeg2 found */
-
- aspect= mpeg2_aspect[s->aspect_ratio_info];
- if(aspect>0.0) s->avctx->aspect_ratio= s->width/(aspect*s->height);
- else if(aspect<0.0) s->avctx->aspect_ratio= -1.0/aspect;
-
- if(s->avctx->debug & FF_DEBUG_PICT_INFO)
- printf("profile: %d, level: %d \n", profile, level);
-}
-
-static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
-{
- int i, v, j;
-
- dprintf("matrix extension\n");
-
- if (get_bits1(&s->gb)) {
- for(i=0;i<64;i++) {
- v = get_bits(&s->gb, 8);
- j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
- s->intra_matrix[j] = v;
- s->chroma_intra_matrix[j] = v;
- }
- }
- if (get_bits1(&s->gb)) {
- for(i=0;i<64;i++) {
- v = get_bits(&s->gb, 8);
- j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
- s->inter_matrix[j] = v;
- s->chroma_inter_matrix[j] = v;
- }
- }
- if (get_bits1(&s->gb)) {
- for(i=0;i<64;i++) {
- v = get_bits(&s->gb, 8);
- j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
- s->chroma_intra_matrix[j] = v;
- }
- }
- if (get_bits1(&s->gb)) {
- for(i=0;i<64;i++) {
- v = get_bits(&s->gb, 8);
- j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
- s->chroma_inter_matrix[j] = v;
- }
- }
-}
-
-static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
-{
- s->full_pel[0] = s->full_pel[1] = 0;
- s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
- s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
- s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
- s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
- s->intra_dc_precision = get_bits(&s->gb, 2);
- s->picture_structure = get_bits(&s->gb, 2);
- s->top_field_first = get_bits1(&s->gb);
- s->frame_pred_frame_dct = get_bits1(&s->gb);
- s->concealment_motion_vectors = get_bits1(&s->gb);
- s->q_scale_type = get_bits1(&s->gb);
- s->intra_vlc_format = get_bits1(&s->gb);
- s->alternate_scan = get_bits1(&s->gb);
- s->repeat_first_field = get_bits1(&s->gb);
- s->chroma_420_type = get_bits1(&s->gb);
- s->progressive_frame = get_bits1(&s->gb);
-
- if(s->picture_structure == PICT_FRAME)
- s->first_field=0;
- else{
- s->first_field ^= 1;
- memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
- }
-
- 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);
- }
-
- /* composite display not parsed */
- dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
- dprintf("picture_structure=%d\n", s->picture_structure);
- dprintf("top field first=%d\n", s->top_field_first);
- dprintf("repeat first field=%d\n", s->repeat_first_field);
- dprintf("conceal=%d\n", s->concealment_motion_vectors);
- dprintf("intra_vlc_format=%d\n", s->intra_vlc_format);
- dprintf("alternate_scan=%d\n", s->alternate_scan);
- dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
- dprintf("progressive_frame=%d\n", s->progressive_frame);
-}
-
-static void mpeg_decode_extension(AVCodecContext *avctx,
- uint8_t *buf, int buf_size)
-{
- Mpeg1Context *s1 = avctx->priv_data;
- MpegEncContext *s = &s1->mpeg_enc_ctx;
- int ext_type;
-
- init_get_bits(&s->gb, buf, buf_size*8);
-
- ext_type = get_bits(&s->gb, 4);
- switch(ext_type) {
- case 0x1:
- /* sequence ext */
- mpeg_decode_sequence_extension(s);
- break;
- case 0x3:
- /* quant matrix extension */
- mpeg_decode_quant_matrix_extension(s);
- break;
- case 0x8:
- /* picture extension */
- mpeg_decode_picture_coding_extension(s);
- break;
- }
-}
-
-static void exchange_uv(AVFrame *f){
- uint8_t *t= f->data[1];
- f->data[1]= f->data[2];
- f->data[2]= t;
-}
-
-#define DECODE_SLICE_FATAL_ERROR -2
-#define DECODE_SLICE_ERROR -1
-#define DECODE_SLICE_OK 0
-
-/**
- * decodes a slice.
- * @return DECODE_SLICE_FATAL_ERROR if a non recoverable error occured<br>
- * DECODE_SLICE_ERROR if the slice is damaged<br>
- * DECODE_SLICE_OK if this slice is ok<br>
- */
-static int mpeg_decode_slice(AVCodecContext *avctx,
- AVFrame *pict,
- int start_code,
- uint8_t **buf, int buf_size)
-{
- Mpeg1Context *s1 = avctx->priv_data;
- MpegEncContext *s = &s1->mpeg_enc_ctx;
- int ret;
- const int field_pic= s->picture_structure != PICT_FRAME;
-
- s->resync_mb_x= s->mb_x =
- s->resync_mb_y= s->mb_y = -1;
-
- start_code = (start_code - 1) & 0xff;
- if (start_code >= s->mb_height){
- fprintf(stderr, "slice below image (%d >= %d)\n", start_code, s->mb_height);
- return -1;
- }
-
- ff_mpeg1_clean_buffers(s);
- s->interlaced_dct = 0;
-
- /* start frame decoding */
- if (s->first_slice) {
- if(s->first_field || s->picture_structure==PICT_FRAME){
- if(MPV_frame_start(s, avctx) < 0)
- return DECODE_SLICE_FATAL_ERROR;
-
- ff_er_frame_start(s);
-
- /* first check if we must repeat the frame */
- s->current_picture_ptr->repeat_pict = 0;
- if (s->repeat_first_field) {
- if (s->progressive_sequence) {
- if (s->top_field_first)
- s->current_picture_ptr->repeat_pict = 4;
- else
- s->current_picture_ptr->repeat_pict = 2;
- } else if (s->progressive_frame) {
- s->current_picture_ptr->repeat_pict = 1;
- }
- }
- //printf("%d\n", s->current_picture_ptr->repeat_pict);
-
- if(s->avctx->debug&FF_DEBUG_PICT_INFO){
- printf("qp:%d fc:%2d%2d%2d%2d %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n",
- s->qscale, s->mpeg_f_code[0][0],s->mpeg_f_code[0][1],s->mpeg_f_code[1][0],s->mpeg_f_code[1][1],
- s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
- s->progressive_sequence ? "pro" :"", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
- s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
- s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
- }
- }else{ //second field
- int i;
-
- if(!s->current_picture_ptr){
- fprintf(stderr, "first field missing\n");
- return -1;
- }
-
- for(i=0; i<4; i++){
- s->current_picture.data[i] = s->current_picture_ptr->data[i];
- if(s->picture_structure == PICT_BOTTOM_FIELD){
- s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
- }
- }
- }
-#ifdef HAVE_XVMC
-// MPV_frame_start will call this function too,
-// but we need to call it on every field
- if(s->avctx->xvmc_acceleration)
- XVMC_field_start(s,avctx);
-#endif
- }//fi(s->first_slice)
- s->first_slice = 0;
-
- init_get_bits(&s->gb, *buf, buf_size*8);
-
- s->qscale = get_qscale(s);
- if(s->qscale == 0){
- fprintf(stderr, "qscale == 0\n");
- return -1;
- }
-
- /* extra slice info */
- while (get_bits1(&s->gb) != 0) {
- skip_bits(&s->gb, 8);
- }
-
- s->mb_x=0;
-
- for(;;) {
- int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
- if (code < 0){
- fprintf(stderr, "first mb_incr damaged\n");
- return -1;
- }
- if (code >= 33) {
- if (code == 33) {
- s->mb_x += 33;
- }
- /* otherwise, stuffing, nothing to do */
- } else {
- s->mb_x += code;
- break;
- }
- }
-
- s->resync_mb_x= s->mb_x;
- s->resync_mb_y= s->mb_y = start_code;
- s->mb_skip_run= 0;
- ff_init_block_index(s);
-
- for(;;) {
- s->dsp.clear_blocks(s->block[0]);
-
- ret = mpeg_decode_mb(s, s->block);
-
- dprintf("ret=%d\n", ret);
- if (ret < 0)
- return -1;
-
- if(s->motion_val && s->pict_type != B_TYPE){ //note motion_val is normally NULL unless we want to extract the MVs
- const int wrap = s->block_wrap[0];
- const int xy = s->mb_x*2 + 1 + (s->mb_y*2 +1)*wrap;
- int motion_x, motion_y;
-
- if (s->mb_intra) {
- motion_x = 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)*/ {
- 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);
- }
- 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;
- }
-
- s->dest[0] += 16;
- s->dest[1] += 8;
- s->dest[2] += 8;
-
- MPV_decode_mb(s, s->block);
-
- if (++s->mb_x >= s->mb_width) {
- if(s->avctx->codec_tag == ff_get_fourcc("VCR2"))
- exchange_uv((AVFrame*)s->current_picture_ptr);
-
- ff_draw_horiz_band(s, 16*s->mb_y, 16);
-
- if(s->avctx->codec_tag == ff_get_fourcc("VCR2"))
- exchange_uv((AVFrame*)s->current_picture_ptr);
-
- s->mb_x = 0;
- s->mb_y++;
-
- if(s->mb_y<<field_pic >= s->mb_height){
- int left= s->gb.size_in_bits - get_bits_count(&s->gb);
-
- if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)))
- || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
- fprintf(stderr, "end missmatch left=%d\n", left);
- return -1;
- }else
- goto eos;
- }
-
- ff_init_block_index(s);
- }
-
- /* skip mb handling */
- if (s->mb_skip_run == -1) {
- /* read again increment */
- s->mb_skip_run = 0;
- for(;;) {
- int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
- if (code < 0){
- fprintf(stderr, "mb incr damaged\n");
- return -1;
- }
- if (code >= 33) {
- if (code == 33) {
- s->mb_skip_run += 33;
- }else if(code == 35){
- if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
- fprintf(stderr, "slice missmatch\n");
- return -1;
- }
- goto eos; /* end of slice */
- }
- /* otherwise, stuffing, nothing to do */
- } else {
- s->mb_skip_run += code;
- break;
- }
- }
- }
- }
-eos: // end of slice
- *buf += get_bits_count(&s->gb)/8 - 1;
-//printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
- return 0;
-}
-
-/**
- * handles slice ends.
- * @return 1 if it seems to be the last slice of
- */
-static int slice_end(AVCodecContext *avctx, AVFrame *pict)
-{
- Mpeg1Context *s1 = avctx->priv_data;
- MpegEncContext *s = &s1->mpeg_enc_ctx;
-
- if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
- return 0;
-
-#ifdef HAVE_XVMC
- if(s->avctx->xvmc_acceleration)
- XVMC_field_end(s);
-#endif
- /* end of slice reached */
- if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
- /* end of image */
-
- if(s->codec_id == CODEC_ID_MPEG2VIDEO){
- s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
- }else
- s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG1;
-
- ff_er_frame_end(s);
-
- MPV_frame_end(s);
-
- if (s->pict_type == B_TYPE || s->low_delay) {
- *pict= *(AVFrame*)s->current_picture_ptr;
- ff_print_debug_info(s, s->current_picture_ptr);
- } else {
- s->picture_number++;
- /* latency of 1 frame for I and P frames */
- /* XXX: use another variable than picture_number */
- if (s->last_picture_ptr != NULL) {
- *pict= *(AVFrame*)s->last_picture_ptr;
- ff_print_debug_info(s, s->last_picture_ptr);
- }
- }
- if(s->avctx->codec_tag == ff_get_fourcc("VCR2"))
- exchange_uv(pict);
-
- return 1;
- } else {
- return 0;
- }
-}
-
-static int mpeg1_decode_sequence(AVCodecContext *avctx,
- uint8_t *buf, int buf_size)
-{
- Mpeg1Context *s1 = avctx->priv_data;
- MpegEncContext *s = &s1->mpeg_enc_ctx;
- int width, height, i, v, j;
- float aspect;
-
- init_get_bits(&s->gb, buf, buf_size*8);
-
- width = get_bits(&s->gb, 12);
- height = get_bits(&s->gb, 12);
- s->aspect_ratio_info= get_bits(&s->gb, 4);
- if(s->codec_id == CODEC_ID_MPEG1VIDEO){
- aspect= mpeg1_aspect[s->aspect_ratio_info];
- if(aspect!=0.0) avctx->aspect_ratio= width/(aspect*height);
- }
-
- s->frame_rate_index = get_bits(&s->gb, 4);
- if (s->frame_rate_index == 0)
- return -1;
- s->bit_rate = get_bits(&s->gb, 18) * 400;
- if (get_bits1(&s->gb) == 0) /* marker */
- return -1;
- if (width <= 0 || height <= 0 ||
- (width % 2) != 0 || (height % 2) != 0)
- return -1;
- if (width != s->width ||
- height != s->height) {
- /* start new mpeg1 context decoding */
- s->out_format = FMT_MPEG1;
- if (s1->mpeg_enc_ctx_allocated) {
- MPV_common_end(s);
- }
- s->width = width;
- s->height = height;
- avctx->has_b_frames= 1;
- s->avctx = avctx;
- avctx->width = width;
- avctx->height = height;
- av_reduce(
- &avctx->frame_rate,
- &avctx->frame_rate_base,
- frame_rate_tab[s->frame_rate_index],
- MPEG1_FRAME_RATE_BASE, //FIXME store in allready reduced form
- 1<<30
- );
- avctx->bit_rate = s->bit_rate;
-
- //get_format() or set_video(width,height,aspect,pix_fmt);
- //until then pix_fmt may be changed right after codec init
- if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
- avctx->idct_algo = FF_IDCT_SIMPLE;
-
- if (MPV_common_init(s) < 0)
- return -1;
- s1->mpeg_enc_ctx_allocated = 1;
- }
-
- skip_bits(&s->gb, 10); /* vbv_buffer_size */
- skip_bits(&s->gb, 1);
-
- /* get matrix */
- if (get_bits1(&s->gb)) {
- for(i=0;i<64;i++) {
- v = get_bits(&s->gb, 8);
- j = s->intra_scantable.permutated[i];
- s->intra_matrix[j] = v;
- s->chroma_intra_matrix[j] = v;
- }
-#ifdef DEBUG
- dprintf("intra matrix present\n");
- for(i=0;i<64;i++)
- dprintf(" %d", s->intra_matrix[s->intra_scantable.permutated[i]]);
- printf("\n");
-#endif
- } else {
- for(i=0;i<64;i++) {
- int j= s->dsp.idct_permutation[i];
- v = ff_mpeg1_default_intra_matrix[i];
- s->intra_matrix[j] = v;
- s->chroma_intra_matrix[j] = v;
- }
- }
- if (get_bits1(&s->gb)) {
- for(i=0;i<64;i++) {
- v = get_bits(&s->gb, 8);
- j = s->intra_scantable.permutated[i];
- s->inter_matrix[j] = v;
- s->chroma_inter_matrix[j] = v;
- }
-#ifdef DEBUG
- dprintf("non intra matrix present\n");
- for(i=0;i<64;i++)
- dprintf(" %d", s->inter_matrix[s->intra_scantable.permutated[i]]);
- printf("\n");
-#endif
- } else {
- for(i=0;i<64;i++) {
- int j= s->dsp.idct_permutation[i];
- v = ff_mpeg1_default_non_intra_matrix[i];
- s->inter_matrix[j] = v;
- s->chroma_inter_matrix[j] = v;
- }
- }
-
- /* we set mpeg2 parameters so that it emulates mpeg1 */
- s->progressive_sequence = 1;
- s->progressive_frame = 1;
- s->picture_structure = PICT_FRAME;
- s->frame_pred_frame_dct = 1;
- s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
- avctx->sub_id = 1; /* indicates mpeg1 */
- return 0;
-}
-
-static int vcr2_init_sequence(AVCodecContext *avctx)
-{
- Mpeg1Context *s1 = avctx->priv_data;
- MpegEncContext *s = &s1->mpeg_enc_ctx;
- int i, v;
-
- /* start new mpeg1 context decoding */
- s->out_format = FMT_MPEG1;
- if (s1->mpeg_enc_ctx_allocated) {
- MPV_common_end(s);
- }
- s->width = avctx->width;
- s->height = avctx->height;
- avctx->has_b_frames= 0; //true?
- s->low_delay= 1;
- s->avctx = avctx;
-
- //get_format() or set_video(width,height,aspect,pix_fmt);
- //until then pix_fmt may be changed right after codec init
- if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
- avctx->idct_algo = FF_IDCT_SIMPLE;
-
- if (MPV_common_init(s) < 0)
- return -1;
- s1->mpeg_enc_ctx_allocated = 1;
-
- for(i=0;i<64;i++) {
- int j= s->dsp.idct_permutation[i];
- v = ff_mpeg1_default_intra_matrix[i];
- s->intra_matrix[j] = v;
- s->chroma_intra_matrix[j] = v;
-
- v = ff_mpeg1_default_non_intra_matrix[i];
- s->inter_matrix[j] = v;
- s->chroma_inter_matrix[j] = v;
- }
-
- s->progressive_sequence = 1;
- s->progressive_frame = 1;
- s->picture_structure = PICT_FRAME;
- s->frame_pred_frame_dct = 1;
- s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
- avctx->sub_id = 2; /* indicates mpeg2 */
- return 0;
-}
-
-
-static void mpeg_decode_user_data(AVCodecContext *avctx,
- const uint8_t *buf, int buf_size)
-{
- const uint8_t *p;
- int len, flags;
- p = buf;
- len = buf_size;
-
- /* we parse the DTG active format information */
- if (len >= 5 &&
- p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
- flags = p[4];
- p += 5;
- len -= 5;
- if (flags & 0x80) {
- /* skip event id */
- if (len < 2)
- return;
- p += 2;
- len -= 2;
- }
- if (flags & 0x40) {
- if (len < 1)
- return;
- avctx->dtg_active_format = p[0] & 0x0f;
- }
- }
-}
-
-/**
- * finds the end of the current frame in the bitstream.
- * @return the position of the first byte of the next frame, or -1
- */
-static int mpeg1_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
- ParseContext *pc= &s->parse_context;
- int i;
- uint32_t state;
-
- state= pc->state;
-
- i=0;
- if(!pc->frame_start_found){
- for(i=0; i<buf_size; i++){
- state= (state<<8) | buf[i];
- if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
- i++;
- pc->frame_start_found=1;
- break;
- }
- }
- }
-
- if(pc->frame_start_found){
- for(; i<buf_size; i++){
- state= (state<<8) | buf[i];
- if((state&0xFFFFFF00) == 0x100){
- if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
- pc->frame_start_found=0;
- pc->state=-1;
- return i-3;
- }
- }
- }
- }
- pc->state= state;
- return END_NOT_FOUND;
-}
-
-/* handle buffering and image synchronisation */
-static int mpeg_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- Mpeg1Context *s = avctx->priv_data;
- uint8_t *buf_end, *buf_ptr;
- int ret, start_code, input_size;
- AVFrame *picture = data;
- MpegEncContext *s2 = &s->mpeg_enc_ctx;
- dprintf("fill_buffer\n");
-
- *data_size = 0;
-
- /* special case for last picture */
- if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) {
- *picture= *(AVFrame*)s2->next_picture_ptr;
- s2->next_picture_ptr= NULL;
-
- *data_size = sizeof(AVFrame);
- return 0;
- }
-
- if(s2->flags&CODEC_FLAG_TRUNCATED){
- int next= mpeg1_find_frame_end(s2, buf, buf_size);
-
- if( ff_combine_frame(s2, next, &buf, &buf_size) < 0 )
- return buf_size;
- }
-
- buf_ptr = buf;
- buf_end = buf + buf_size;
-
-#if 0
- if (s->repeat_field % 2 == 1) {
- s->repeat_field++;
- //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
- // s2->picture_number, s->repeat_field);
- if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
- *data_size = sizeof(AVPicture);
- goto the_end;
- }
- }
-#endif
-
- if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
- vcr2_init_sequence(avctx);
-
- for(;;) {
- /* find start next code */
- start_code = find_start_code(&buf_ptr, buf_end);
- if (start_code < 0){
- if(s2->pict_type != B_TYPE || avctx->hurry_up==0){
- if (slice_end(avctx, picture)) {
- if(s2->last_picture_ptr) //FIXME merge with the stuff in mpeg_decode_slice
- *data_size = sizeof(AVPicture);
- }
- }
- return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
- }
-
- input_size = buf_end - buf_ptr;
-
- if(avctx->debug & FF_DEBUG_STARTCODE){
- printf("%3X at %d left %d\n", start_code, buf_ptr-buf, input_size);
- }
-
- /* prepare data for next start code */
- switch(start_code) {
- case SEQ_START_CODE:
- mpeg1_decode_sequence(avctx, buf_ptr,
- input_size);
- break;
-
- case PICTURE_START_CODE:
- /* we have a complete image : we try to decompress it */
- mpeg1_decode_picture(avctx,
- buf_ptr, input_size);
- break;
- case EXT_START_CODE:
- mpeg_decode_extension(avctx,
- buf_ptr, input_size);
- break;
- case USER_START_CODE:
- mpeg_decode_user_data(avctx,
- buf_ptr, input_size);
- break;
- case GOP_START_CODE:
- s2->first_field=0;
- break;
- default:
- if (start_code >= SLICE_MIN_START_CODE &&
- start_code <= SLICE_MAX_START_CODE) {
-
- /* skip b frames if we dont have reference frames */
- if(s2->last_picture_ptr==NULL && s2->pict_type==B_TYPE) break;
- /* skip b frames if we are in a hurry */
- if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
- /* skip everything if we are in a hurry>=5 */
- if(avctx->hurry_up>=5) break;
-
- if (!s->mpeg_enc_ctx_allocated) break;
-
- ret = mpeg_decode_slice(avctx, picture,
- start_code, &buf_ptr, input_size);
- emms_c();
-
- if(ret < 0){
- if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
- ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
- if(ret==DECODE_SLICE_FATAL_ERROR) return -1;
- }else{
- ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, AC_END|DC_END|MV_END);
- }
- }
- break;
- }
- }
-}
-
-static int mpeg_decode_end(AVCodecContext *avctx)
-{
- Mpeg1Context *s = avctx->priv_data;
-
- if (s->mpeg_enc_ctx_allocated)
- MPV_common_end(&s->mpeg_enc_ctx);
- return 0;
-}
-
-AVCodec mpeg1video_decoder = {
- "mpeg1video",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MPEG1VIDEO,
- sizeof(Mpeg1Context),
- mpeg_decode_init,
- NULL,
- mpeg_decode_end,
- mpeg_decode_frame,
- CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
- .flush= ff_mpeg_flush,
-};
-
-AVCodec mpeg2video_decoder = {
- "mpeg2video",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MPEG2VIDEO,
- sizeof(Mpeg1Context),
- mpeg_decode_init,
- NULL,
- mpeg_decode_end,
- mpeg_decode_frame,
- CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
- .flush= ff_mpeg_flush,
-};
-
-#ifdef HAVE_XVMC
-static int mpeg_mc_decode_init(AVCodecContext *avctx){
- Mpeg1Context *s;
-
- if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
- return -1;
- if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) )
- dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
-
- mpeg_decode_init(avctx);
- s = avctx->priv_data;
-
- avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
- avctx->xvmc_acceleration = 1;
-
- return 0;
-}
-
-AVCodec mpeg_xvmc_decoder = {
- "mpegvideo_xvmc",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MPEG2VIDEO_XVMC,
- sizeof(Mpeg1Context),
- mpeg_mc_decode_init,
- NULL,
- mpeg_decode_end,
- mpeg_decode_frame,
- CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
-};
-
-#endif
-
-/* this is ugly i know, but the alternative is too make
- hundreds of vars global and prefix them with ff_mpeg1_
- which is far uglier. */
-#include "mdec.c"
projects / synfig.git / blobdiff