--- /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