347ae22ecf
Originally committed as revision 1182 to svn://svn.ffmpeg.org/ffmpeg/trunk
801 lines
23 KiB
C
801 lines
23 KiB
C
/*
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* H263 decoder
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* Copyright (c) 2001 Fabrice Bellard.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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#if 1
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#define PRINT_QP(a, b) {}
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#else
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#define PRINT_QP(a, b) printf(a, b)
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#endif
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//#define DEBUG
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//#define PRINT_FRAME_TIME
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#ifdef PRINT_FRAME_TIME
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static inline long long rdtsc()
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{
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long long l;
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asm volatile( "rdtsc\n\t"
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: "=A" (l)
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);
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// printf("%d\n", int(l/1000));
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return l;
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}
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#endif
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static int h263_decode_init(AVCodecContext *avctx)
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{
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MpegEncContext *s = avctx->priv_data;
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s->avctx = avctx;
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s->out_format = FMT_H263;
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s->width = avctx->width;
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s->height = avctx->height;
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s->workaround_bugs= avctx->workaround_bugs;
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// set defaults
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s->quant_precision=5;
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s->progressive_sequence=1;
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s->decode_mb= ff_h263_decode_mb;
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/* select sub codec */
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switch(avctx->codec->id) {
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case CODEC_ID_H263:
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s->gob_number = 0;
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break;
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case CODEC_ID_MPEG4:
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s->time_increment_bits = 4; /* default value for broken headers */
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s->h263_pred = 1;
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s->has_b_frames = 1; //default, might be overriden in the vol header during header parsing
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break;
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case CODEC_ID_MSMPEG4V1:
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s->h263_msmpeg4 = 1;
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s->h263_pred = 1;
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s->msmpeg4_version=1;
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break;
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case CODEC_ID_MSMPEG4V2:
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s->h263_msmpeg4 = 1;
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s->h263_pred = 1;
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s->msmpeg4_version=2;
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break;
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case CODEC_ID_MSMPEG4V3:
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s->h263_msmpeg4 = 1;
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s->h263_pred = 1;
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s->msmpeg4_version=3;
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break;
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case CODEC_ID_WMV1:
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s->h263_msmpeg4 = 1;
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s->h263_pred = 1;
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s->msmpeg4_version=4;
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break;
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case CODEC_ID_WMV2:
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s->h263_msmpeg4 = 1;
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s->h263_pred = 1;
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s->msmpeg4_version=5;
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break;
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case CODEC_ID_H263I:
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s->h263_intel = 1;
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break;
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default:
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return -1;
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}
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s->codec_id= avctx->codec->id;
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/* for h263, we allocate the images after having read the header */
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if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
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if (MPV_common_init(s) < 0)
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return -1;
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if (s->h263_msmpeg4)
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ff_msmpeg4_decode_init(s);
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else
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h263_decode_init_vlc(s);
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return 0;
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}
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static int h263_decode_end(AVCodecContext *avctx)
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{
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MpegEncContext *s = avctx->priv_data;
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MPV_common_end(s);
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return 0;
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}
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/**
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* retunrs the number of bytes consumed for building the current frame
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*/
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static int get_consumed_bytes(MpegEncContext *s, int buf_size){
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int pos= (get_bits_count(&s->gb)+7)>>3;
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if(s->divx_version>=500){
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//we would have to scan through the whole buf to handle the weird reordering ...
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return buf_size;
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}else if(s->flags&CODEC_FLAG_TRUNCATED){
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pos -= s->parse_context.last_index;
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if(pos<0) pos=0; // padding is not really read so this might be -1
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return pos;
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}else{
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if(pos==0) pos=1; //avoid infinite loops (i doubt thats needed but ...)
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if(pos+10>buf_size) pos=buf_size; // oops ;)
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return pos;
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}
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}
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static int decode_slice(MpegEncContext *s){
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s->last_resync_gb= s->gb;
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s->first_slice_line= 1;
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s->resync_mb_x= s->mb_x;
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s->resync_mb_y= s->mb_y;
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s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
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s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
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if(s->partitioned_frame){
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const int qscale= s->qscale;
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if(s->codec_id==CODEC_ID_MPEG4){
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if(ff_mpeg4_decode_partitions(s) < 0)
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return -1;
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}
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/* restore variables which where modified */
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s->first_slice_line=1;
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s->mb_x= s->resync_mb_x;
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s->mb_y= s->resync_mb_y;
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s->qscale= qscale;
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s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
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s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
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}
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for(; s->mb_y < s->mb_height; s->mb_y++) {
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/* per-row end of slice checks */
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if(s->msmpeg4_version){
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if(s->resync_mb_y + s->slice_height == s->mb_y){
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const int xy= s->mb_x + s->mb_y*s->mb_width;
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s->error_status_table[xy-1]|= AC_END|DC_END|MV_END;
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return 0;
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}
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}
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if(s->msmpeg4_version==1){
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s->last_dc[0]=
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s->last_dc[1]=
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s->last_dc[2]= 128;
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}
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ff_init_block_index(s);
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for(; s->mb_x < s->mb_width; s->mb_x++) {
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int ret;
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ff_update_block_index(s);
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if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
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s->first_slice_line=0;
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}
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/* DCT & quantize */
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clear_blocks(s->block[0]);
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s->mv_dir = MV_DIR_FORWARD;
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s->mv_type = MV_TYPE_16X16;
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//printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
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ret= s->decode_mb(s, s->block);
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PRINT_QP("%2d", s->qscale);
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MPV_decode_mb(s, s->block);
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if(ret<0){
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const int xy= s->mb_x + s->mb_y*s->mb_width;
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if(ret==SLICE_END){
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//printf("%d %d %d %06X\n", s->mb_x, s->mb_y, s->gb.size*8 - get_bits_count(&s->gb), show_bits(&s->gb, 24));
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s->error_status_table[xy]|= AC_END;
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if(!s->partitioned_frame)
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s->error_status_table[xy]|= MV_END|DC_END;
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s->padding_bug_score--;
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if(++s->mb_x >= s->mb_width){
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s->mb_x=0;
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ff_draw_horiz_band(s);
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s->mb_y++;
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}
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return 0;
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}else if(ret==SLICE_NOEND){
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fprintf(stderr,"Slice mismatch at MB: %d\n", xy);
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return -1;
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}
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fprintf(stderr,"Error at MB: %d\n", xy);
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s->error_status_table[xy]|= AC_ERROR;
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if(!s->partitioned_frame)
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s->error_status_table[xy]|= DC_ERROR|MV_ERROR;
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return -1;
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}
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}
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ff_draw_horiz_band(s);
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PRINT_QP("%s", "\n");
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s->mb_x= 0;
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}
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assert(s->mb_x==0 && s->mb_y==s->mb_height);
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/* try to detect the padding bug */
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if( s->codec_id==CODEC_ID_MPEG4
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&& (s->workaround_bugs&FF_BUG_AUTODETECT)
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&& s->gb.size*8 - get_bits_count(&s->gb) >=0
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&& s->gb.size*8 - get_bits_count(&s->gb) < 48
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&& !s->resync_marker
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&& !s->data_partitioning){
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const int bits_count= get_bits_count(&s->gb);
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const int bits_left = s->gb.size*8 - bits_count;
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if(bits_left==0 || bits_left>8){
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s->padding_bug_score++;
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} else if(bits_left != 1){
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int v= show_bits(&s->gb, 8);
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v|= 0x7F >> (7-(bits_count&7));
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if(v==0x7F)
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s->padding_bug_score--;
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else
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s->padding_bug_score++;
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}
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if(s->padding_bug_score > -2)
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s->workaround_bugs |= FF_BUG_NO_PADDING;
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else
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s->workaround_bugs &= ~FF_BUG_NO_PADDING;
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}
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// handle formats which dont have unique end markers
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if(s->msmpeg4_version || (s->workaround_bugs&FF_BUG_NO_PADDING)){ //FIXME perhaps solve this more cleanly
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int left= s->gb.size*8 - get_bits_count(&s->gb);
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int max_extra=7;
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/* no markers in M$ crap */
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if(s->msmpeg4_version && s->pict_type==I_TYPE)
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max_extra+= 17;
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/* buggy padding but the frame should still end approximately at the bitstream end */
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if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_resilience>=3)
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max_extra+= 48;
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else if((s->workaround_bugs&FF_BUG_NO_PADDING))
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max_extra+= 256*256*256*64;
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if(left>max_extra){
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fprintf(stderr, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
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}
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else if(left<0){
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fprintf(stderr, "overreading %d bits\n", -left);
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}else
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s->error_status_table[s->mb_num-1]|= AC_END|MV_END|DC_END;
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return 0;
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}
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fprintf(stderr, "slice end not reached but screenspace end (%d left %06X)\n",
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s->gb.size*8 - get_bits_count(&s->gb),
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show_bits(&s->gb, 24));
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return -1;
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}
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/**
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* finds the end of the current frame in the bitstream.
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* @return the position of the first byte of the next frame, or -1
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*/
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static int mpeg4_find_frame_end(MpegEncContext *s, UINT8 *buf, int buf_size){
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ParseContext *pc= &s->parse_context;
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int vop_found, i;
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uint32_t state;
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vop_found= pc->frame_start_found;
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state= pc->state;
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i=0;
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if(!vop_found){
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for(i=0; i<buf_size; i++){
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state= (state<<8) | buf[i];
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if(state == 0x1B6){
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i++;
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vop_found=1;
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break;
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}
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}
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}
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for(; i<buf_size; i++){
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state= (state<<8) | buf[i];
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if((state&0xFFFFFF00) == 0x100){
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pc->frame_start_found=0;
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pc->state=-1;
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return i-3;
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}
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}
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pc->frame_start_found= vop_found;
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pc->state= state;
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return -1;
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}
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static int h263_decode_frame(AVCodecContext *avctx,
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void *data, int *data_size,
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UINT8 *buf, int buf_size)
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{
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MpegEncContext *s = avctx->priv_data;
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int ret,i;
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AVPicture *pict = data;
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#ifdef PRINT_FRAME_TIME
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uint64_t time= rdtsc();
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#endif
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#ifdef DEBUG
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printf("*****frame %d size=%d\n", avctx->frame_number, buf_size);
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printf("bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
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#endif
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s->hurry_up= avctx->hurry_up;
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s->error_resilience= avctx->error_resilience;
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s->flags= avctx->flags;
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*data_size = 0;
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/* no supplementary picture */
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if (buf_size == 0) {
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return 0;
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}
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if(s->flags&CODEC_FLAG_TRUNCATED){
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int next;
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ParseContext *pc= &s->parse_context;
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pc->last_index= pc->index;
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if(s->codec_id==CODEC_ID_MPEG4){
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next= mpeg4_find_frame_end(s, buf, buf_size);
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}else{
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fprintf(stderr, "this codec doesnt support truncated bitstreams\n");
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return -1;
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}
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if(next==-1){
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if(buf_size + FF_INPUT_BUFFER_PADDING_SIZE + pc->index > pc->buffer_size){
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pc->buffer_size= buf_size + pc->index + 10*1024;
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pc->buffer= realloc(pc->buffer, pc->buffer_size);
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}
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memcpy(&pc->buffer[pc->index], buf, buf_size);
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pc->index += buf_size;
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return buf_size;
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}
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if(pc->index){
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if(next + FF_INPUT_BUFFER_PADDING_SIZE + pc->index > pc->buffer_size){
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pc->buffer_size= next + pc->index + 10*1024;
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pc->buffer= realloc(pc->buffer, pc->buffer_size);
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}
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memcpy(&pc->buffer[pc->index], buf, next + FF_INPUT_BUFFER_PADDING_SIZE );
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pc->index = 0;
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buf= pc->buffer;
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buf_size= pc->last_index + next;
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}
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}
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retry:
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if(s->bitstream_buffer_size && buf_size<20){ //divx 5.01+ frame reorder
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init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size);
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}else
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init_get_bits(&s->gb, buf, buf_size);
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s->bitstream_buffer_size=0;
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if (!s->context_initialized) {
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if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
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return -1;
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}
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/* let's go :-) */
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if (s->h263_msmpeg4) {
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ret = msmpeg4_decode_picture_header(s);
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} else if (s->h263_pred) {
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if(s->avctx->extradata_size && s->picture_number==0){
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GetBitContext gb;
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init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size);
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ret = ff_mpeg4_decode_picture_header(s, &gb);
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}
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ret = ff_mpeg4_decode_picture_header(s, &s->gb);
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if(s->flags& CODEC_FLAG_LOW_DELAY)
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s->low_delay=1;
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s->has_b_frames= !s->low_delay;
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} else if (s->h263_intel) {
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ret = intel_h263_decode_picture_header(s);
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} else {
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ret = h263_decode_picture_header(s);
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}
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avctx->has_b_frames= s->has_b_frames;
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if(s->workaround_bugs&FF_BUG_AUTODETECT){
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if(s->avctx->fourcc == ff_get_fourcc("XVIX"))
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s->workaround_bugs|= FF_BUG_XVID_ILACE;
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if(s->avctx->fourcc == ff_get_fourcc("MP4S"))
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s->workaround_bugs|= FF_BUG_AC_VLC;
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if(s->avctx->fourcc == ff_get_fourcc("M4S2"))
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s->workaround_bugs|= FF_BUG_AC_VLC;
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if(s->avctx->fourcc == ff_get_fourcc("UMP4")){
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s->workaround_bugs|= FF_BUG_UMP4;
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s->workaround_bugs|= FF_BUG_AC_VLC;
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}
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if(s->divx_version){
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s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
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}
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if(s->avctx->fourcc == ff_get_fourcc("XVID") && s->xvid_build==0)
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s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
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if(s->xvid_build && s->xvid_build<=1)
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s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
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//printf("padding_bug_score: %d\n", s->padding_bug_score);
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#if 0
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if(s->divx_version==500)
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s->workaround_bugs|= FF_BUG_NO_PADDING;
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/* very ugly XVID padding bug detection FIXME/XXX solve this differently
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* lets hope this at least works
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*/
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if( s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==0
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&& s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0)
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s->workaround_bugs|= FF_BUG_NO_PADDING;
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if(s->lavc_build && s->lavc_build<4609) //FIXME not sure about the version num but a 4609 file seems ok
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s->workaround_bugs|= FF_BUG_NO_PADDING;
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#endif
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}
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#if 0 // dump bits per frame / qp / complexity
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{
|
|
static FILE *f=NULL;
|
|
if(!f) f=fopen("rate_qp_cplx.txt", "w");
|
|
fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale);
|
|
}
|
|
#endif
|
|
|
|
/* After H263 & mpeg4 header decode we have the height, width,*/
|
|
/* and other parameters. So then we could init the picture */
|
|
/* FIXME: By the way H263 decoder is evolving it should have */
|
|
/* an H263EncContext */
|
|
if ( s->width != avctx->width || s->height != avctx->height
|
|
|| avctx->aspect_ratio_info != s->aspect_ratio_info
|
|
|| avctx->aspected_width != s->aspected_width
|
|
|| avctx->aspected_height != s->aspected_height) {
|
|
/* H.263 could change picture size any time */
|
|
MPV_common_end(s);
|
|
s->context_initialized=0;
|
|
}
|
|
if (!s->context_initialized) {
|
|
avctx->width = s->width;
|
|
avctx->height = s->height;
|
|
avctx->aspect_ratio_info= s->aspect_ratio_info;
|
|
if (s->aspect_ratio_info == FF_ASPECT_EXTENDED)
|
|
{
|
|
avctx->aspected_width = s->aspected_width;
|
|
avctx->aspected_height = s->aspected_height;
|
|
}
|
|
|
|
goto retry;
|
|
}
|
|
|
|
if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P))
|
|
s->gob_index = ff_h263_get_gob_height(s);
|
|
|
|
if(ret==FRAME_SKIPED) return get_consumed_bytes(s, buf_size);
|
|
/* skip if the header was thrashed */
|
|
if (ret < 0){
|
|
fprintf(stderr, "header damaged\n");
|
|
return -1;
|
|
}
|
|
|
|
s->avctx->key_frame = (s->pict_type == I_TYPE);
|
|
s->avctx->pict_type = s->pict_type;
|
|
|
|
/* skip b frames if we dont have reference frames */
|
|
if(s->num_available_buffers<2 && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
|
|
/* skip b frames if we are in a hurry */
|
|
if(s->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
|
|
/* skip everything if we are in a hurry>=5 */
|
|
if(s->hurry_up>=5) return get_consumed_bytes(s, buf_size);
|
|
|
|
if(s->next_p_frame_damaged){
|
|
if(s->pict_type==B_TYPE)
|
|
return get_consumed_bytes(s, buf_size);
|
|
else
|
|
s->next_p_frame_damaged=0;
|
|
}
|
|
|
|
if(MPV_frame_start(s, avctx) < 0)
|
|
return -1;
|
|
|
|
#ifdef DEBUG
|
|
printf("qscale=%d\n", s->qscale);
|
|
#endif
|
|
|
|
if(s->error_resilience)
|
|
memset(s->error_status_table, MV_ERROR|AC_ERROR|DC_ERROR|VP_START|AC_END|DC_END|MV_END, s->mb_num*sizeof(UINT8));
|
|
|
|
/* decode each macroblock */
|
|
s->block_wrap[0]=
|
|
s->block_wrap[1]=
|
|
s->block_wrap[2]=
|
|
s->block_wrap[3]= s->mb_width*2 + 2;
|
|
s->block_wrap[4]=
|
|
s->block_wrap[5]= s->mb_width + 2;
|
|
s->mb_x=0;
|
|
s->mb_y=0;
|
|
|
|
decode_slice(s);
|
|
s->error_status_table[0]|= VP_START;
|
|
while(s->mb_y<s->mb_height && s->gb.size*8 - get_bits_count(&s->gb)>16){
|
|
if(s->msmpeg4_version){
|
|
if(s->mb_x!=0 || (s->mb_y%s->slice_height)!=0)
|
|
break;
|
|
}else{
|
|
if(ff_h263_resync(s)<0)
|
|
break;
|
|
}
|
|
|
|
if(s->msmpeg4_version!=4 && s->h263_pred)
|
|
ff_mpeg4_clean_buffers(s);
|
|
|
|
decode_slice(s);
|
|
|
|
s->error_status_table[s->resync_mb_x + s->resync_mb_y*s->mb_width]|= VP_START;
|
|
}
|
|
|
|
if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE)
|
|
if(msmpeg4_decode_ext_header(s, buf_size) < 0) return -1;
|
|
|
|
/* divx 5.01+ bistream reorder stuff */
|
|
if(s->codec_id==CODEC_ID_MPEG4 && s->bitstream_buffer_size==0 && s->divx_version>=500){
|
|
int current_pos= get_bits_count(&s->gb)>>3;
|
|
|
|
if( buf_size - current_pos > 5
|
|
&& buf_size - current_pos < BITSTREAM_BUFFER_SIZE){
|
|
int i;
|
|
int startcode_found=0;
|
|
for(i=current_pos; i<buf_size-3; i++){
|
|
if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){
|
|
startcode_found=1;
|
|
break;
|
|
}
|
|
}
|
|
if(startcode_found){
|
|
memcpy(s->bitstream_buffer, buf + current_pos, buf_size - current_pos);
|
|
s->bitstream_buffer_size= buf_size - current_pos;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(s->error_resilience){
|
|
int error=0, num_end_markers=0;
|
|
for(i=0; i<s->mb_num; i++){
|
|
int status= s->error_status_table[i];
|
|
#if 0
|
|
if(i%s->mb_width == 0) printf("\n");
|
|
printf("%2X ", status);
|
|
#endif
|
|
if(status==0) continue;
|
|
|
|
if(status&(DC_ERROR|AC_ERROR|MV_ERROR))
|
|
error=1;
|
|
if(status&VP_START){
|
|
if(num_end_markers)
|
|
error=1;
|
|
num_end_markers=3;
|
|
}
|
|
if(status&AC_END)
|
|
num_end_markers--;
|
|
if(status&DC_END)
|
|
num_end_markers--;
|
|
if(status&MV_END)
|
|
num_end_markers--;
|
|
}
|
|
if(num_end_markers || error){
|
|
fprintf(stderr, "concealing errors\n");
|
|
//printf("type:%d\n", s->pict_type);
|
|
ff_error_resilience(s);
|
|
}
|
|
}
|
|
|
|
MPV_frame_end(s);
|
|
#if 0 //dirty show MVs, we should export the MV tables and write a filter to show them
|
|
{
|
|
int mb_y;
|
|
s->has_b_frames=1;
|
|
for(mb_y=0; mb_y<s->mb_height; mb_y++){
|
|
int mb_x;
|
|
int y= mb_y*16 + 8;
|
|
for(mb_x=0; mb_x<s->mb_width; mb_x++){
|
|
int x= mb_x*16 + 8;
|
|
uint8_t *ptr= s->last_picture[0];
|
|
int xy= 1 + mb_x*2 + (mb_y*2 + 1)*(s->mb_width*2 + 2);
|
|
int mx= (s->motion_val[xy][0]>>1) + x;
|
|
int my= (s->motion_val[xy][1]>>1) + y;
|
|
int i;
|
|
int max;
|
|
|
|
if(mx<0) mx=0;
|
|
if(my<0) my=0;
|
|
if(mx>=s->width) mx= s->width -1;
|
|
if(my>=s->height) my= s->height-1;
|
|
max= ABS(mx-x);
|
|
if(ABS(my-y) > max) max= ABS(my-y);
|
|
/* the ugliest linedrawing routine ... */
|
|
for(i=0; i<max; i++){
|
|
int x1= x + (mx-x)*i/max;
|
|
int y1= y + (my-y)*i/max;
|
|
ptr[y1*s->linesize + x1]+=100;
|
|
}
|
|
ptr[y*s->linesize + x]+=100;
|
|
s->mbskip_table[mb_x + mb_y*s->mb_width]=0;
|
|
}
|
|
}
|
|
|
|
}
|
|
#endif
|
|
if(s->pict_type==B_TYPE || (!s->has_b_frames)){
|
|
pict->data[0] = s->current_picture[0];
|
|
pict->data[1] = s->current_picture[1];
|
|
pict->data[2] = s->current_picture[2];
|
|
} else {
|
|
pict->data[0] = s->last_picture[0];
|
|
pict->data[1] = s->last_picture[1];
|
|
pict->data[2] = s->last_picture[2];
|
|
}
|
|
pict->linesize[0] = s->linesize;
|
|
pict->linesize[1] = s->uvlinesize;
|
|
pict->linesize[2] = s->uvlinesize;
|
|
|
|
avctx->quality = s->qscale;
|
|
|
|
/* Return the Picture timestamp as the frame number */
|
|
/* we substract 1 because it is added on utils.c */
|
|
avctx->frame_number = s->picture_number - 1;
|
|
|
|
/* dont output the last pic after seeking
|
|
note we allready added +1 for the current pix in MPV_frame_end(s) */
|
|
if(s->num_available_buffers>=2 || (!s->has_b_frames))
|
|
*data_size = sizeof(AVPicture);
|
|
#ifdef PRINT_FRAME_TIME
|
|
printf("%Ld\n", rdtsc()-time);
|
|
#endif
|
|
return get_consumed_bytes(s, buf_size);
|
|
}
|
|
|
|
AVCodec mpeg4_decoder = {
|
|
"mpeg4",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MPEG4,
|
|
sizeof(MpegEncContext),
|
|
h263_decode_init,
|
|
NULL,
|
|
h263_decode_end,
|
|
h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
|
|
};
|
|
|
|
AVCodec h263_decoder = {
|
|
"h263",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_H263,
|
|
sizeof(MpegEncContext),
|
|
h263_decode_init,
|
|
NULL,
|
|
h263_decode_end,
|
|
h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec msmpeg4v1_decoder = {
|
|
"msmpeg4v1",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MSMPEG4V1,
|
|
sizeof(MpegEncContext),
|
|
h263_decode_init,
|
|
NULL,
|
|
h263_decode_end,
|
|
h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec msmpeg4v2_decoder = {
|
|
"msmpeg4v2",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MSMPEG4V2,
|
|
sizeof(MpegEncContext),
|
|
h263_decode_init,
|
|
NULL,
|
|
h263_decode_end,
|
|
h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec msmpeg4v3_decoder = {
|
|
"msmpeg4",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MSMPEG4V3,
|
|
sizeof(MpegEncContext),
|
|
h263_decode_init,
|
|
NULL,
|
|
h263_decode_end,
|
|
h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec wmv1_decoder = {
|
|
"wmv1",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_WMV1,
|
|
sizeof(MpegEncContext),
|
|
h263_decode_init,
|
|
NULL,
|
|
h263_decode_end,
|
|
h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec wmv2_decoder = {
|
|
"wmv2",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_WMV2,
|
|
sizeof(MpegEncContext),
|
|
h263_decode_init,
|
|
NULL,
|
|
h263_decode_end,
|
|
h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec h263i_decoder = {
|
|
"h263i",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_H263I,
|
|
sizeof(MpegEncContext),
|
|
h263_decode_init,
|
|
NULL,
|
|
h263_decode_end,
|
|
h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|