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Diffstat (limited to 'contrib/ffmpeg/libavcodec/mpeg12.c')
-rw-r--r--contrib/ffmpeg/libavcodec/mpeg12.c2496
1 files changed, 2496 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/mpeg12.c b/contrib/ffmpeg/libavcodec/mpeg12.c
new file mode 100644
index 000000000..56b456a07
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/mpeg12.c
@@ -0,0 +1,2496 @@
+/*
+ * MPEG1/2 decoder
+ * Copyright (c) 2000,2001 Fabrice Bellard.
+ * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file mpeg12.c
+ * MPEG1/2 decoder
+ */
+
+//#define DEBUG
+#include "avcodec.h"
+#include "dsputil.h"
+#include "mpegvideo.h"
+
+#include "mpeg12.h"
+#include "mpeg12data.h"
+#include "mpeg12decdata.h"
+#include "bytestream.h"
+
+//#undef NDEBUG
+//#include <assert.h>
+
+
+#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 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 mpeg1_fast_decode_block_inter(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 inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n);
+static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n);
+static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
+static void exchange_uv(MpegEncContext *s);
+
+extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx);
+extern int XVMC_field_end(MpegEncContext *s);
+extern void XVMC_pack_pblocks(MpegEncContext *s,int cbp);
+extern void XVMC_init_block(MpegEncContext *s);//set s->block
+
+static const enum PixelFormat pixfmt_yuv_420[]= {PIX_FMT_YUV420P,-1};
+static const enum PixelFormat pixfmt_yuv_422[]= {PIX_FMT_YUV422P,-1};
+static const enum PixelFormat pixfmt_yuv_444[]= {PIX_FMT_YUV444P,-1};
+static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
+ PIX_FMT_XVMC_MPEG2_IDCT,
+ PIX_FMT_XVMC_MPEG2_MC,
+ -1};
+
+uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
+
+static void init_2d_vlc_rl(RLTable *rl, int use_static)
+{
+ 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, use_static);
+
+ if(use_static)
+ rl->rl_vlc[0]= av_mallocz_static(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
+ else
+ 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;
+ }
+}
+
+void ff_mpeg12_common_init(MpegEncContext *s)
+{
+
+ s->y_dc_scale_table=
+ s->c_dc_scale_table= mpeg2_dc_scale_table[s->intra_dc_precision];
+
+}
+
+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));
+}
+
+
+/******************************************/
+/* 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(void)
+{
+ static int done = 0;
+
+ if (!done) {
+ done = 1;
+
+ init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
+ ff_mpeg12_vlc_dc_lum_bits, 1, 1,
+ ff_mpeg12_vlc_dc_lum_code, 2, 2, 1);
+ init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
+ ff_mpeg12_vlc_dc_chroma_bits, 1, 1,
+ ff_mpeg12_vlc_dc_chroma_code, 2, 2, 1);
+ init_vlc(&mv_vlc, MV_VLC_BITS, 17,
+ &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1,
+ &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 1);
+ init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
+ &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1,
+ &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 1);
+ init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
+ &ff_mpeg12_mbPatTable[0][1], 2, 1,
+ &ff_mpeg12_mbPatTable[0][0], 2, 1, 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, 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, 1);
+ init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
+ init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
+
+ init_2d_vlc_rl(&ff_rl_mpeg1, 1);
+ init_2d_vlc_rl(&ff_rl_mpeg2, 1);
+ }
+}
+
+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->q_scale_type) {
+ return non_linear_qscale[qscale];
+ } else {
+ return qscale << 1;
+ }
+}
+
+/* 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[12][64])
+{
+ int i, j, k, cbp, val, mb_type, motion_type;
+ const int mb_block_count = 4 + (1<< s->chroma_format);
+
+ dprintf(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
+
+ assert(s->mb_skipped==0);
+
+ if (s->mb_skip_run-- != 0) {
+ if (s->pict_type == P_TYPE) {
+ s->mb_skipped = 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 {
+ int mb_type;
+
+ if(s->mb_x)
+ mb_type= s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1];
+ else
+ mb_type= s->current_picture.mb_type[ s->mb_width + (s->mb_y-1)*s->mb_stride - 1]; // FIXME not sure if this is allowed in mpeg at all,
+ if(IS_INTRA(mb_type))
+ return -1;
+
+ s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
+ mb_type | 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_skipped = 1;
+ }
+
+ return 0;
+ }
+
+ switch(s->pict_type) {
+ default:
+ case I_TYPE:
+ if (get_bits1(&s->gb) == 0) {
+ if (get_bits1(&s->gb) == 0){
+ av_log(s->avctx, AV_LOG_ERROR, "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){
+ av_log(s->avctx, AV_LOG_ERROR, "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){
+ av_log(s->avctx, AV_LOG_ERROR, "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(s->avctx, "mb_type=%x\n", mb_type);
+// motion_type = 0; /* avoid warning */
+ if (IS_INTRA(mb_type)) {
+ s->dsp.clear_blocks(s->block[0]);
+
+ if(!s->chroma_y_shift){
+ s->dsp.clear_blocks(s->block[6]);
+ }
+
+ /* 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;
+#ifdef HAVE_XVMC
+ //one 1 we memcpy blocks in xvmcvideo
+ if(s->avctx->xvmc_acceleration > 1){
+ XVMC_pack_pblocks(s,-1);//inter are always full blocks
+ if(s->swap_uv){
+ exchange_uv(s);
+ }
+ }
+#endif
+
+ if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
+ if(s->flags2 & CODEC_FLAG2_FAST){
+ for(i=0;i<6;i++) {
+ mpeg2_fast_decode_block_intra(s, s->pblocks[i], i);
+ }
+ }else{
+ for(i=0;i<mb_block_count;i++) {
+ if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
+ return -1;
+ }
+ }
+ } else {
+ for(i=0;i<6;i++) {
+ if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
+ return -1;
+ }
+ }
+ } else {
+ if (mb_type & MB_TYPE_ZERO_MV){
+ assert(mb_type & MB_TYPE_CBP);
+
+ s->mv_dir = MV_DIR_FORWARD;
+ if(s->picture_structure == PICT_FRAME){
+ if(!s->frame_pred_frame_dct)
+ s->interlaced_dct = get_bits1(&s->gb);
+ s->mv_type = MV_TYPE_16X16;
+ }else{
+ s->mv_type = MV_TYPE_FIELD;
+ mb_type |= MB_TYPE_INTERLACED;
+ s->field_select[0][0]= s->picture_structure - 1;
+ }
+
+ if (IS_QUANT(mb_type))
+ s->qscale = get_qscale(s);
+
+ 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 additional motion vector type */
+ if (s->frame_pred_frame_dct)
+ motion_type = MT_FRAME;
+ else{
+ motion_type = get_bits(&s->gb, 2);
+ if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
+ s->interlaced_dct = get_bits1(&s->gb);
+ }
+
+ if (IS_QUANT(mb_type))
+ s->qscale = get_qscale(s);
+
+ /* motion vectors */
+ s->mv_dir= (mb_type>>13)&3;
+ dprintf(s->avctx, "motion_type=%d\n", motion_type);
+ switch(motion_type) {
+ case MT_FRAME: /* or MT_16X8 */
+ if (s->picture_structure == PICT_FRAME) {
+ mb_type |= MB_TYPE_16x16;
+ s->mv_type = MV_TYPE_16X16;
+ for(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
+ /* MT_FRAME */
+ 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 {
+ mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
+ s->mv_type = MV_TYPE_16X8;
+ for(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
+ /* MT_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(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
+ 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(s->avctx, "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(s->avctx, "fmy=%d\n", val);
+ }
+ }
+ }
+ } else {
+ mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
+ for(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
+ 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:
+ s->mv_type = MV_TYPE_DMV;
+ for(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
+ 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->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;
+ default:
+ av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+ }
+
+ s->mb_intra = 0;
+ if (HAS_CBP(mb_type)) {
+ s->dsp.clear_blocks(s->block[0]);
+
+ cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
+ if(mb_block_count > 6){
+ cbp<<= mb_block_count-6;
+ cbp |= get_bits(&s->gb, mb_block_count-6);
+ s->dsp.clear_blocks(s->block[6]);
+ }
+ if (cbp <= 0){
+ av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+
+#ifdef HAVE_XVMC
+ //on 1 we memcpy blocks in xvmcvideo
+ if(s->avctx->xvmc_acceleration > 1){
+ XVMC_pack_pblocks(s,cbp);
+ if(s->swap_uv){
+ exchange_uv(s);
+ }
+ }
+#endif
+
+ if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
+ if(s->flags2 & CODEC_FLAG2_FAST){
+ for(i=0;i<6;i++) {
+ if(cbp & 32) {
+ mpeg2_fast_decode_block_non_intra(s, s->pblocks[i], i);
+ } else {
+ s->block_last_index[i] = -1;
+ }
+ cbp+=cbp;
+ }
+ }else{
+ cbp<<= 12-mb_block_count;
+
+ for(i=0;i<mb_block_count;i++) {
+ if ( cbp & (1<<11) ) {
+ if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
+ return -1;
+ } else {
+ s->block_last_index[i] = -1;
+ }
+ cbp+=cbp;
+ }
+ }
+ } else {
+ if(s->flags2 & CODEC_FLAG2_FAST){
+ for(i=0;i<6;i++) {
+ if (cbp & 32) {
+ mpeg1_fast_decode_block_inter(s, s->pblocks[i], i);
+ } 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, s->pblocks[i], i) < 0)
+ return -1;
+ } else {
+ s->block_last_index[i] = -1;
+ }
+ cbp+=cbp;
+ }
+ }
+ }
+ }else{
+ for(i=0;i<12;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= INT_BIT - 5 - shift;
+ val = (val<<l)>>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){
+ av_log(NULL, AV_LOG_ERROR, "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 = &ff_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(s->avctx, "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, 0);
+
+ if(level == 127){
+ break;
+ } else if(level != 0) {
+ i += run;
+ j = scantable[i];
+ level= (level*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*qscale*quant_matrix[j])>>4;
+ level= (level-1)|1;
+ level= -level;
+ }else{
+ level= (level*qscale*quant_matrix[j])>>4;
+ level= (level-1)|1;
+ }
+ }
+ if (i > 63){
+ av_log(s->avctx, AV_LOG_ERROR, "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 = &ff_rl_mpeg1;
+ uint8_t * const scantable= s->intra_scantable.permutated;
+ const uint16_t *quant_matrix= s->inter_matrix;
+ const int qscale= s->qscale;
+
+ {
+ 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);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
+ level= (3*qscale*quant_matrix[0])>>5;
+ level= (level-1)|1;
+ if(GET_CACHE(re, &s->gb)&0x40000000)
+ level= -level;
+ block[0] = level;
+ i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
+ }
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+ /* now quantify & encode AC coefs */
+ for(;;) {
+ GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+
+ if(level != 0) {
+ i += run;
+ j = scantable[i];
+ level= ((level*2+1)*qscale*quant_matrix[j])>>5;
+ level= (level-1)|1;
+ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
+ 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; SKIP_BITS(re, &s->gb, 8);
+ } else if (level == 0) {
+ level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
+ }
+ i += run;
+ j = scantable[i];
+ if(level<0){
+ level= -level;
+ level= ((level*2+1)*qscale*quant_matrix[j])>>5;
+ level= (level-1)|1;
+ level= -level;
+ }else{
+ level= ((level*2+1)*qscale*quant_matrix[j])>>5;
+ level= (level-1)|1;
+ }
+ }
+ if (i > 63){
+ av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+
+ block[j] = level;
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+#if MIN_CACHE_BITS >= 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+ }
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
+ CLOSE_READER(re, &s->gb);
+ }
+ s->block_last_index[n] = i;
+ return 0;
+}
+
+static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
+{
+ int level, i, j, run;
+ RLTable *rl = &ff_rl_mpeg1;
+ uint8_t * const scantable= s->intra_scantable.permutated;
+ const int qscale= s->qscale;
+
+ {
+ 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);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
+ level= (3*qscale)>>1;
+ level= (level-1)|1;
+ if(GET_CACHE(re, &s->gb)&0x40000000)
+ level= -level;
+ block[0] = level;
+ i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
+ }
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+
+ /* now quantify & encode AC coefs */
+ for(;;) {
+ GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+
+ if(level != 0) {
+ i += run;
+ j = scantable[i];
+ level= ((level*2+1)*qscale)>>1;
+ level= (level-1)|1;
+ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
+ 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; SKIP_BITS(re, &s->gb, 8);
+ } else if (level == 0) {
+ level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
+ }
+ i += run;
+ j = scantable[i];
+ if(level<0){
+ level= -level;
+ level= ((level*2+1)*qscale)>>1;
+ level= (level-1)|1;
+ level= -level;
+ }else{
+ level= ((level*2+1)*qscale)>>1;
+ level= (level-1)|1;
+ }
+ }
+
+ block[j] = level;
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+#if MIN_CACHE_BITS >= 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+ }
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
+ CLOSE_READER(re, &s->gb);
+ }
+ s->block_last_index[n] = i;
+ return 0;
+}
+
+
+static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
+ DCTELEM *block,
+ int n)
+{
+ int level, i, j, run;
+ RLTable *rl = &ff_rl_mpeg1;
+ uint8_t * const scantable= s->intra_scantable.permutated;
+ const uint16_t *quant_matrix;
+ const int qscale= s->qscale;
+ int mismatch;
+
+ mismatch = 1;
+
+ {
+ 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);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
+ level= (3*qscale*quant_matrix[0])>>5;
+ if(GET_CACHE(re, &s->gb)&0x40000000)
+ level= -level;
+ block[0] = level;
+ mismatch ^= level;
+ i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
+ }
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+
+ /* now quantify & encode AC coefs */
+ for(;;) {
+ GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+
+ 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);
+ 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){
+ av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+
+ mismatch ^= level;
+ block[j] = level;
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+#if MIN_CACHE_BITS >= 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+ }
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
+ CLOSE_READER(re, &s->gb);
+ }
+ block[63] ^= (mismatch & 1);
+
+ s->block_last_index[n] = i;
+ return 0;
+}
+
+static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
+ DCTELEM *block,
+ int n)
+{
+ int level, i, j, run;
+ RLTable *rl = &ff_rl_mpeg1;
+ uint8_t * const scantable= s->intra_scantable.permutated;
+ const int qscale= s->qscale;
+ 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);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
+ level= (3*qscale)>>1;
+ if(GET_CACHE(re, &s->gb)&0x40000000)
+ level= -level;
+ block[0] = level;
+ i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
+ }
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+
+ /* now quantify & encode AC coefs */
+ for(;;) {
+ GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+
+ if(level != 0) {
+ i += run;
+ j = scantable[i];
+ level= ((level*2+1)*qscale)>>1;
+ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
+ 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)>>1;
+ level= -level;
+ }else{
+ level= ((level*2+1)*qscale)>>1;
+ }
+ }
+
+ block[j] = level;
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+#if MIN_CACHE_BITS >=19
+ UPDATE_CACHE(re, &s->gb);
+#endif
+ }
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
+ CLOSE_READER(re, &s->gb);
+ 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&1) + 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 - s->intra_dc_precision);
+ dprintf(s->avctx, "dc=%d\n", block[0]);
+ mismatch = block[0] ^ 1;
+ i = 0;
+ if (s->intra_vlc_format)
+ rl = &ff_rl_mpeg2;
+ else
+ rl = &ff_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, 0);
+
+ 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){
+ av_log(s->avctx, AV_LOG_ERROR, "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_fast_decode_block_intra(MpegEncContext *s,
+ DCTELEM *block,
+ int n)
+{
+ int level, dc, diff, j, run;
+ int component;
+ RLTable *rl;
+ uint8_t * scantable= s->intra_scantable.permutated;
+ const uint16_t *quant_matrix;
+ const int qscale= s->qscale;
+
+ /* DC coef */
+ if (n < 4){
+ quant_matrix = s->intra_matrix;
+ component = 0;
+ }else{
+ quant_matrix = s->chroma_intra_matrix;
+ component = (n&1) + 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 - s->intra_dc_precision);
+ if (s->intra_vlc_format)
+ rl = &ff_rl_mpeg2;
+ else
+ rl = &ff_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, 0);
+
+ if(level == 127){
+ break;
+ } else if(level != 0) {
+ scantable += run;
+ j = *scantable;
+ 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);
+ scantable += run;
+ j = *scantable;
+ if(level<0){
+ level= (-level*qscale*quant_matrix[j])>>4;
+ level= -level;
+ }else{
+ level= (level*qscale*quant_matrix[j])>>4;
+ }
+ }
+
+ block[j] = level;
+ }
+ CLOSE_READER(re, &s->gb);
+ }
+
+ s->block_last_index[n] = scantable - s->intra_scantable.permutated;
+ 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 */
+ AVPanScan pan_scan; /** some temporary storage for the panscan */
+ int slice_count;
+ int swap_uv;//indicate VCR2
+ int save_aspect_info;
+ int save_width, save_height;
+ AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
+
+} Mpeg1Context;
+
+static int mpeg_decode_init(AVCodecContext *avctx)
+{
+ Mpeg1Context *s = avctx->priv_data;
+ MpegEncContext *s2 = &s->mpeg_enc_ctx;
+ int i;
+
+ //we need some parmutation to store
+ //matrixes, until MPV_common_init()
+ //set the real permutatuon
+ for(i=0;i<64;i++)
+ s2->dsp.idct_permutation[i]=i;
+
+ MPV_decode_defaults(s2);
+
+ s->mpeg_enc_ctx.avctx= avctx;
+ s->mpeg_enc_ctx.flags= avctx->flags;
+ s->mpeg_enc_ctx.flags2= avctx->flags2;
+ ff_mpeg12_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;
+}
+
+static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
+ const uint8_t *new_perm){
+ uint16_t temp_matrix[64];
+ int i;
+
+ memcpy(temp_matrix,matrix,64*sizeof(uint16_t));
+
+ for(i=0;i<64;i++){
+ matrix[new_perm[i]] = temp_matrix[old_perm[i]];
+ }
+}
+
+//Call this function when we know all parameters
+//it may be called in different places for mpeg1 and mpeg2
+static int mpeg_decode_postinit(AVCodecContext *avctx){
+ Mpeg1Context *s1 = avctx->priv_data;
+ MpegEncContext *s = &s1->mpeg_enc_ctx;
+ uint8_t old_permutation[64];
+
+ if (
+ (s1->mpeg_enc_ctx_allocated == 0)||
+ avctx->coded_width != s->width ||
+ avctx->coded_height != s->height||
+ s1->save_width != s->width ||
+ s1->save_height != s->height ||
+ s1->save_aspect_info != s->aspect_ratio_info||
+ 0)
+ {
+
+ if (s1->mpeg_enc_ctx_allocated) {
+ ParseContext pc= s->parse_context;
+ s->parse_context.buffer=0;
+ MPV_common_end(s);
+ s->parse_context= pc;
+ }
+
+ if( (s->width == 0 )||(s->height == 0))
+ return -2;
+
+ avcodec_set_dimensions(avctx, s->width, s->height);
+ avctx->bit_rate = s->bit_rate;
+ s1->save_aspect_info = s->aspect_ratio_info;
+ s1->save_width = s->width;
+ s1->save_height = s->height;
+
+ //low_delay may be forced, in this case we will have B frames
+ //that behave like P frames
+ avctx->has_b_frames = !(s->low_delay);
+
+ if(avctx->sub_id==1){//s->codec_id==avctx->codec_id==CODEC_ID
+ //mpeg1 fps
+ avctx->time_base.den= ff_frame_rate_tab[s->frame_rate_index].num;
+ avctx->time_base.num= ff_frame_rate_tab[s->frame_rate_index].den;
+ //mpeg1 aspect
+ avctx->sample_aspect_ratio= av_d2q(
+ 1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
+
+ }else{//mpeg2
+ //mpeg2 fps
+ av_reduce(
+ &s->avctx->time_base.den,
+ &s->avctx->time_base.num,
+ ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
+ ff_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
+ 1<<30);
+ //mpeg2 aspect
+ if(s->aspect_ratio_info > 1){
+ if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) ){
+ s->avctx->sample_aspect_ratio=
+ av_div_q(
+ ff_mpeg2_aspect[s->aspect_ratio_info],
+ (AVRational){s->width, s->height}
+ );
+ }else{
+ s->avctx->sample_aspect_ratio=
+ av_div_q(
+ ff_mpeg2_aspect[s->aspect_ratio_info],
+ (AVRational){s1->pan_scan.width, s1->pan_scan.height}
+ );
+ }
+ }else{
+ s->avctx->sample_aspect_ratio=
+ ff_mpeg2_aspect[s->aspect_ratio_info];
+ }
+ }//mpeg2
+
+ if(avctx->xvmc_acceleration){
+ avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
+ }else{
+ if(s->chroma_format < 2){
+ avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
+ }else
+ if(s->chroma_format == 2){
+ avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_422);
+ }else
+ if(s->chroma_format > 2){
+ avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_444);
+ }
+ }
+ //until then pix_fmt may be changed right after codec init
+ if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
+ if( avctx->idct_algo == FF_IDCT_AUTO )
+ avctx->idct_algo = FF_IDCT_SIMPLE;
+
+ //quantization matrixes may need reordering
+ //if dct permutation is changed
+ memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t));
+
+ if (MPV_common_init(s) < 0)
+ return -2;
+
+ quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation);
+ quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation);
+ quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation);
+ quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation);
+
+ s1->mpeg_enc_ctx_allocated = 1;
+ }
+ return 0;
+}
+
+static int mpeg1_decode_picture(AVCodecContext *avctx,
+ const uint8_t *buf, int buf_size)
+{
+ Mpeg1Context *s1 = avctx->priv_data;
+ MpegEncContext *s = &s1->mpeg_enc_ctx;
+ int ref, f_code, vbv_delay;
+
+ if(mpeg_decode_postinit(s->avctx) < 0)
+ return -2;
+
+ 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);
+ if(s->pict_type == 0 || s->pict_type > 3)
+ return -1;
+
+ vbv_delay= get_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 && avctx->error_resilience >= FF_ER_COMPLIANT)
+ 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 && avctx->error_resilience >= FF_ER_COMPLIANT)
+ 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;
+
+ if(avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
+
+ s->y_dc_scale = 8;
+ s->c_dc_scale = 8;
+ s->first_slice = 1;
+ return 0;
+}
+
+static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
+{
+ MpegEncContext *s= &s1->mpeg_enc_ctx;
+ int horiz_size_ext, vert_size_ext;
+ int bit_rate_ext;
+
+ skip_bits(&s->gb, 1); /* profil and level esc*/
+ s->avctx->profile= get_bits(&s->gb, 3);
+ s->avctx->level= get_bits(&s->gb, 4);
+ s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
+ s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
+ 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 += (bit_rate_ext << 18) * 400;
+ skip_bits1(&s->gb); /* marker */
+ s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
+
+ s->low_delay = get_bits1(&s->gb);
+ if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
+
+ s1->frame_rate_ext.num = get_bits(&s->gb, 2)+1;
+ s1->frame_rate_ext.den = get_bits(&s->gb, 5)+1;
+
+ dprintf(s->avctx, "sequence extension\n");
+ s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
+ s->avctx->sub_id = 2; /* indicates mpeg2 found */
+
+ if(s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
+ s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
+
+}
+
+static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
+{
+ MpegEncContext *s= &s1->mpeg_enc_ctx;
+ int color_description, w, h;
+
+ skip_bits(&s->gb, 3); /* video format */
+ color_description= get_bits1(&s->gb);
+ if(color_description){
+ skip_bits(&s->gb, 8); /* color primaries */
+ skip_bits(&s->gb, 8); /* transfer_characteristics */
+ skip_bits(&s->gb, 8); /* matrix_coefficients */
+ }
+ w= get_bits(&s->gb, 14);
+ skip_bits(&s->gb, 1); //marker
+ h= get_bits(&s->gb, 14);
+ skip_bits(&s->gb, 1); //marker
+
+ s1->pan_scan.width= 16*w;
+ s1->pan_scan.height=16*h;
+
+ if(s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
+}
+
+static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
+{
+ MpegEncContext *s= &s1->mpeg_enc_ctx;
+ int i,nofco;
+
+ nofco = 1;
+ if(s->progressive_sequence){
+ if(s->repeat_first_field){
+ nofco++;
+ if(s->top_field_first)
+ nofco++;
+ }
+ }else{
+ if(s->picture_structure == PICT_FRAME){
+ nofco++;
+ if(s->repeat_first_field)
+ nofco++;
+ }
+ }
+ for(i=0; i<nofco; i++){
+ s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
+ skip_bits(&s->gb, 1); //marker
+ s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
+ skip_bits(&s->gb, 1); //marker
+ }
+
+ if(s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
+ s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
+ s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
+ s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
+ );
+}
+
+static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
+{
+ int i, v, j;
+
+ dprintf(s->avctx, "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;
+ s->v_edge_pos= 16*s->mb_height;
+ }else{
+ s->first_field ^= 1;
+ s->v_edge_pos= 8*s->mb_height;
+ 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);
+ }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);
+ }
+
+ /* composite display not parsed */
+ dprintf(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
+ dprintf(s->avctx, "picture_structure=%d\n", s->picture_structure);
+ dprintf(s->avctx, "top field first=%d\n", s->top_field_first);
+ dprintf(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
+ dprintf(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
+ dprintf(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
+ dprintf(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
+ dprintf(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
+ dprintf(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
+}
+
+static void mpeg_decode_extension(AVCodecContext *avctx,
+ const 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:
+ mpeg_decode_sequence_extension(s1);
+ break;
+ case 0x2:
+ mpeg_decode_sequence_display_extension(s1);
+ break;
+ case 0x3:
+ mpeg_decode_quant_matrix_extension(s);
+ break;
+ case 0x7:
+ mpeg_decode_picture_display_extension(s1);
+ break;
+ case 0x8:
+ mpeg_decode_picture_coding_extension(s);
+ break;
+ }
+}
+
+static void exchange_uv(MpegEncContext *s){
+ short * tmp = s->pblocks[4];
+ s->pblocks[4] = s->pblocks[5];
+ s->pblocks[5] = tmp;
+}
+
+static int mpeg_field_start(MpegEncContext *s){
+ AVCodecContext *avctx= s->avctx;
+ Mpeg1Context *s1 = (Mpeg1Context*)s;
+
+ /* start frame decoding */
+ if(s->first_field || s->picture_structure==PICT_FRAME){
+ if(MPV_frame_start(s, avctx) < 0)
+ return -1;
+
+ 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;
+ }
+ }
+
+ *s->current_picture_ptr->pan_scan= s1->pan_scan;
+ }else{ //second field
+ int i;
+
+ if(!s->current_picture_ptr){
+ av_log(s->avctx, AV_LOG_ERROR, "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
+
+ return 0;
+}
+
+#define DECODE_SLICE_ERROR -1
+#define DECODE_SLICE_OK 0
+
+/**
+ * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
+ * @return DECODE_SLICE_ERROR if the slice is damaged<br>
+ * DECODE_SLICE_OK if this slice is ok<br>
+ */
+static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
+ const uint8_t **buf, int buf_size)
+{
+ MpegEncContext *s = &s1->mpeg_enc_ctx;
+ AVCodecContext *avctx= s->avctx;
+ const int field_pic= s->picture_structure != PICT_FRAME;
+ const int lowres= s->avctx->lowres;
+
+ s->resync_mb_x=
+ s->resync_mb_y= -1;
+
+ if (mb_y<<field_pic >= s->mb_height){
+ av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s->mb_height);
+ return -1;
+ }
+
+ init_get_bits(&s->gb, *buf, buf_size*8);
+
+ ff_mpeg1_clean_buffers(s);
+ s->interlaced_dct = 0;
+
+ s->qscale = get_qscale(s);
+
+ if(s->qscale == 0){
+ av_log(s->avctx, AV_LOG_ERROR, "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){
+ av_log(s->avctx, AV_LOG_ERROR, "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;
+ }
+ }
+ if(s->mb_x >= (unsigned)s->mb_width){
+ av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
+ return -1;
+ }
+
+ s->resync_mb_x= s->mb_x;
+ s->resync_mb_y= s->mb_y= mb_y;
+ s->mb_skip_run= 0;
+ ff_init_block_index(s);
+
+ if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) {
+ if(s->avctx->debug&FF_DEBUG_PICT_INFO){
+ av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%2d%2d%2d%2d %s %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 ? "ps" :"", s->progressive_frame ? "pf" : "", 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" :"");
+ }
+ }
+
+ for(;;) {
+#ifdef HAVE_XVMC
+ //one 1 we memcpy blocks in xvmcvideo
+ if(s->avctx->xvmc_acceleration > 1)
+ XVMC_init_block(s);//set s->block
+#endif
+
+ if(mpeg_decode_mb(s, s->block) < 0)
+ return -1;
+
+ if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
+ const int wrap = field_pic ? 2*s->b8_stride : s->b8_stride;
+ int xy = s->mb_x*2 + s->mb_y*2*wrap;
+ int motion_x, motion_y, dir, i;
+ if(field_pic && !s->first_field)
+ xy += wrap/2;
+
+ for(i=0; i<2; i++){
+ for(dir=0; dir<2; dir++){
+ if (s->mb_intra || (dir==1 && s->pict_type != B_TYPE)) {
+ motion_x = motion_y = 0;
+ }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){
+ motion_x = s->mv[dir][0][0];
+ motion_y = s->mv[dir][0][1];
+ } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
+ motion_x = s->mv[dir][i][0];
+ motion_y = s->mv[dir][i][1];
+ }
+
+ s->current_picture.motion_val[dir][xy ][0] = motion_x;
+ s->current_picture.motion_val[dir][xy ][1] = motion_y;
+ s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
+ s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
+ s->current_picture.ref_index [dir][xy ]=
+ s->current_picture.ref_index [dir][xy + 1]= s->field_select[dir][i];
+ assert(s->field_select[dir][i]==0 || s->field_select[dir][i]==1);
+ }
+ xy += wrap;
+ }
+ }
+
+ s->dest[0] += 16 >> lowres;
+ s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
+ s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
+
+ MPV_decode_mb(s, s->block);
+
+ if (++s->mb_x >= s->mb_width) {
+ const int mb_size= 16>>s->avctx->lowres;
+
+ ff_draw_horiz_band(s, mb_size*s->mb_y, mb_size);
+
+ 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);
+ int is_d10= s->chroma_format==2 && s->pict_type==I_TYPE && avctx->profile==0 && avctx->level==5
+ && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
+ && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
+
+ if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
+ || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
+ av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
+ 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){
+ av_log(s->avctx, AV_LOG_ERROR, "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){
+ av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
+ return -1;
+ }
+ goto eos; /* end of slice */
+ }
+ /* otherwise, stuffing, nothing to do */
+ } else {
+ s->mb_skip_run += code;
+ break;
+ }
+ }
+ if(s->mb_skip_run){
+ int i;
+ if(s->pict_type == I_TYPE){
+ av_log(s->avctx, AV_LOG_ERROR, "skipped 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<12;i++)
+ s->block_last_index[i] = -1;
+ if(s->picture_structure == PICT_FRAME)
+ s->mv_type = MV_TYPE_16X16;
+ else
+ s->mv_type = MV_TYPE_FIELD;
+ 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->field_select[0][0]= s->picture_structure - 1;
+ } 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];
+ }
+ }
+ }
+ }
+eos: // end of slice
+ *buf += (get_bits_count(&s->gb)-1)/8;
+//printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
+ return 0;
+}
+
+static int slice_decode_thread(AVCodecContext *c, void *arg){
+ MpegEncContext *s= arg;
+ const uint8_t *buf= s->gb.buffer;
+ int mb_y= s->start_mb_y;
+
+ s->error_count= 3*(s->end_mb_y - s->start_mb_y)*s->mb_width;
+
+ for(;;){
+ uint32_t start_code;
+ int ret;
+
+ ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf);
+ emms_c();
+//av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
+//ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, s->start_mb_y, s->end_mb_y, s->error_count);
+ if(ret < 0){
+ if(s->resync_mb_x>=0 && s->resync_mb_y>=0)
+ ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
+ }else{
+ ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
+ }
+
+ if(s->mb_y == s->end_mb_y)
+ return 0;
+
+ start_code= -1;
+ buf = ff_find_start_code(buf, s->gb.buffer_end, &start_code);
+ mb_y= start_code - SLICE_MIN_START_CODE;
+ if(mb_y < 0 || mb_y >= s->end_mb_y)
+ return -1;
+ }
+
+ return 0; //not reached
+}
+
+/**
+ * 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 */
+
+ s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
+
+ 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, pict);
+ } 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, pict);
+ }
+ }
+
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+static int mpeg1_decode_sequence(AVCodecContext *avctx,
+ const uint8_t *buf, int buf_size)
+{
+ Mpeg1Context *s1 = avctx->priv_data;
+ MpegEncContext *s = &s1->mpeg_enc_ctx;
+ int width,height;
+ int i, v, j;
+
+ init_get_bits(&s->gb, buf, buf_size*8);
+
+ width = get_bits(&s->gb, 12);
+ height = get_bits(&s->gb, 12);
+ if (width <= 0 || height <= 0 ||
+ (width % 2) != 0 || (height % 2) != 0)
+ return -1;
+ s->aspect_ratio_info= get_bits(&s->gb, 4);
+ if (s->aspect_ratio_info == 0)
+ return -1;
+ s->frame_rate_index = get_bits(&s->gb, 4);
+ if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
+ return -1;
+ s->bit_rate = get_bits(&s->gb, 18) * 400;
+ if (get_bits1(&s->gb) == 0) /* marker */
+ return -1;
+ s->width = width;
+ s->height = height;
+
+ s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
+ skip_bits(&s->gb, 1);
+
+ /* get matrix */
+ if (get_bits1(&s->gb)) {
+ for(i=0;i<64;i++) {
+ v = get_bits(&s->gb, 8);
+ if(v==0){
+ av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n");
+ return -1;
+ }
+ j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
+ s->intra_matrix[j] = v;
+ s->chroma_intra_matrix[j] = v;
+ }
+#ifdef DEBUG
+ dprintf(s->avctx, "intra matrix present\n");
+ for(i=0;i<64;i++)
+ dprintf(s->avctx, " %d", s->intra_matrix[s->dsp.idct_permutation[i]]);
+ dprintf(s->avctx, "\n");
+#endif
+ } else {
+ for(i=0;i<64;i++) {
+ 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);
+ if(v==0){
+ av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n");
+ return -1;
+ }
+ j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
+ s->inter_matrix[j] = v;
+ s->chroma_inter_matrix[j] = v;
+ }
+#ifdef DEBUG
+ dprintf(s->avctx, "non intra matrix present\n");
+ for(i=0;i<64;i++)
+ dprintf(s->avctx, " %d", s->inter_matrix[s->dsp.idct_permutation[i]]);
+ dprintf(s->avctx, "\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;
+ }
+ }
+
+ if(show_bits(&s->gb, 23) != 0){
+ av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
+ return -1;
+ }
+
+ /* 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->chroma_format = 1;
+ s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
+ avctx->sub_id = 1; /* indicates mpeg1 */
+ s->out_format = FMT_MPEG1;
+ s->swap_uv = 0;//AFAIK VCR2 don't have SEQ_HEADER
+ if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
+
+ if(s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
+ s->avctx->rc_buffer_size, s->bit_rate);
+
+ 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->coded_width;
+ s->height = avctx->coded_height;
+ avctx->has_b_frames= 0; //true?
+ s->low_delay= 1;
+
+ if(avctx->xvmc_acceleration){
+ avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
+ }else{
+ avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
+ }
+
+ if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
+ if( avctx->idct_algo == FF_IDCT_AUTO )
+ avctx->idct_algo = FF_IDCT_SIMPLE;
+
+ if (MPV_common_init(s) < 0)
+ return -1;
+ exchange_uv(s);//common init reset pblocks, so we swap them here
+ s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
+ 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->chroma_format = 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;
+ }
+ }
+}
+
+static void mpeg_decode_gop(AVCodecContext *avctx,
+ const uint8_t *buf, int buf_size){
+ Mpeg1Context *s1 = avctx->priv_data;
+ MpegEncContext *s = &s1->mpeg_enc_ctx;
+
+ int drop_frame_flag;
+ int time_code_hours, time_code_minutes;
+ int time_code_seconds, time_code_pictures;
+ int broken_link;
+
+ init_get_bits(&s->gb, buf, buf_size*8);
+
+ drop_frame_flag = get_bits1(&s->gb);
+
+ time_code_hours=get_bits(&s->gb,5);
+ time_code_minutes = get_bits(&s->gb,6);
+ skip_bits1(&s->gb);//marker bit
+ time_code_seconds = get_bits(&s->gb,6);
+ time_code_pictures = get_bits(&s->gb,6);
+
+ /*broken_link indicate that after editing the
+ reference frames of the first B-Frames after GOP I-Frame
+ are missing (open gop)*/
+ broken_link = get_bits1(&s->gb);
+
+ if(s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) broken_link=%d\n",
+ time_code_hours, time_code_minutes, time_code_seconds,
+ time_code_pictures, broken_link);
+}
+/**
+ * finds the end of the current frame in the bitstream.
+ * @return the position of the first byte of the next frame, or -1
+ */
+int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
+{
+ int i;
+ uint32_t state= pc->state;
+
+ /* EOF considered as end of frame */
+ if (buf_size == 0)
+ return 0;
+
+/*
+ 0 frame start -> 1/4
+ 1 first_SEQEXT -> 0/2
+ 2 first field start -> 3/0
+ 3 second_SEQEXT -> 2/0
+ 4 searching end
+*/
+
+ for(i=0; i<buf_size; i++){
+ assert(pc->frame_start_found>=0 && pc->frame_start_found<=4);
+ if(pc->frame_start_found&1){
+ if(state == EXT_START_CODE && (buf[i]&0xF0) != 0x80)
+ pc->frame_start_found--;
+ else if(state == EXT_START_CODE+2){
+ if((buf[i]&3) == 3) pc->frame_start_found= 0;
+ else pc->frame_start_found= (pc->frame_start_found+1)&3;
+ }
+ state++;
+ }else{
+ i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1;
+ if(pc->frame_start_found==0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
+ i++;
+ pc->frame_start_found=4;
+ }
+ if(state == SEQ_END_CODE){
+ pc->state=-1;
+ return i+1;
+ }
+ if(pc->frame_start_found==2 && state == SEQ_START_CODE)
+ pc->frame_start_found= 0;
+ if(pc->frame_start_found<4 && state == EXT_START_CODE)
+ pc->frame_start_found++;
+ if(pc->frame_start_found == 4 && (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,
+ const uint8_t *buf, int buf_size)
+{
+ Mpeg1Context *s = avctx->priv_data;
+ const uint8_t *buf_end;
+ const uint8_t *buf_ptr;
+ uint32_t start_code;
+ int ret, input_size;
+ AVFrame *picture = data;
+ MpegEncContext *s2 = &s->mpeg_enc_ctx;
+ dprintf(avctx, "fill_buffer\n");
+
+ if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
+ /* special case for last picture */
+ if (s2->low_delay==0 && s2->next_picture_ptr) {
+ *picture= *(AVFrame*)s2->next_picture_ptr;
+ s2->next_picture_ptr= NULL;
+
+ *data_size = sizeof(AVFrame);
+ }
+ return buf_size;
+ }
+
+ if(s2->flags&CODEC_FLAG_TRUNCATED){
+ int next= ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size);
+
+ if( ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&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);
+
+ s->slice_count= 0;
+
+ for(;;) {
+ /* find start next code */
+ start_code = -1;
+ buf_ptr = ff_find_start_code(buf_ptr,buf_end, &start_code);
+ if (start_code > 0x1ff){
+ if(s2->pict_type != B_TYPE || avctx->skip_frame <= AVDISCARD_DEFAULT){
+ if(avctx->thread_count > 1){
+ int i;
+
+ avctx->execute(avctx, slice_decode_thread, (void**)&(s2->thread_context[0]), NULL, s->slice_count);
+ for(i=0; i<s->slice_count; i++)
+ s2->error_count += s2->thread_context[i]->error_count;
+ }
+ if (slice_end(avctx, picture)) {
+ if(s2->last_picture_ptr || s2->low_delay) //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){
+ av_log(avctx, AV_LOG_DEBUG, "%3X at %zd 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;
+ mpeg_decode_gop(avctx,
+ buf_ptr, input_size);
+ break;
+ default:
+ if (start_code >= SLICE_MIN_START_CODE &&
+ start_code <= SLICE_MAX_START_CODE) {
+ int mb_y= start_code - SLICE_MIN_START_CODE;
+
+ if(s2->last_picture_ptr==NULL){
+ /* Skip B-frames if we do not have reference frames. */
+ if(s2->pict_type==B_TYPE) break;
+ }
+ if(s2->next_picture_ptr==NULL){
+ /* Skip P-frames if we do not have reference frame no valid header. */
+ if(s2->pict_type==P_TYPE && (s2->first_field || s2->picture_structure==PICT_FRAME)) break;
+ }
+ /* Skip B-frames if we are in a hurry. */
+ if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
+ if( (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==B_TYPE)
+ ||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=I_TYPE)
+ || avctx->skip_frame >= AVDISCARD_ALL)
+ break;
+ /* Skip everything if we are in a hurry>=5. */
+ if(avctx->hurry_up>=5) break;
+
+ if (!s->mpeg_enc_ctx_allocated) break;
+
+ if(s2->codec_id == CODEC_ID_MPEG2VIDEO){
+ if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
+ break;
+ }
+
+ if(s2->first_slice){
+ s2->first_slice=0;
+ if(mpeg_field_start(s2) < 0)
+ return -1;
+ }
+ if(!s2->current_picture_ptr){
+ av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
+ return -1;
+ }
+
+ if(avctx->thread_count > 1){
+ int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count;
+ if(threshold <= mb_y){
+ MpegEncContext *thread_context= s2->thread_context[s->slice_count];
+
+ thread_context->start_mb_y= mb_y;
+ thread_context->end_mb_y = s2->mb_height;
+ if(s->slice_count){
+ s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
+ ff_update_duplicate_context(thread_context, s2);
+ }
+ init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
+ s->slice_count++;
+ }
+ buf_ptr += 2; //FIXME add minimum num of bytes per slice
+ }else{
+ ret = mpeg_decode_slice(s, mb_y, &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);
+ }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 | CODEC_CAP_DELAY,
+ .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 | CODEC_CAP_DELAY,
+ .flush= ff_mpeg_flush,
+};
+
+//legacy decoder
+AVCodec mpegvideo_decoder = {
+ "mpegvideo",
+ 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 | CODEC_CAP_DELAY,
+ .flush= ff_mpeg_flush,
+};
+
+#ifdef HAVE_XVMC
+static int mpeg_mc_decode_init(AVCodecContext *avctx){
+ Mpeg1Context *s;
+
+ if( avctx->thread_count > 1)
+ return -1;
+ if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
+ return -1;
+ if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
+ dprintf(avctx, "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 = 2;//2 - the blocks are packed!
+
+ 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| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
+ .flush= ff_mpeg_flush,
+};
+
+#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"
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-02 06:57:58 +0000