X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftags%2Fstable%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fh263dec.c;fp=synfig-core%2Ftags%2Fstable%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fh263dec.c;h=4778851267171354acb3d5184814f488beaaed32;hb=46036a57bc1ab5583c5d5c2188e8c52d7682d9d5;hp=0000000000000000000000000000000000000000;hpb=6745aa58ba1df6f71ccdcdb332fef4ca8774f278;p=synfig.git diff --git a/synfig-core/tags/stable/src/modules/mod_libavcodec/libavcodec/h263dec.c b/synfig-core/tags/stable/src/modules/mod_libavcodec/libavcodec/h263dec.c new file mode 100644 index 0000000..4778851 --- /dev/null +++ b/synfig-core/tags/stable/src/modules/mod_libavcodec/libavcodec/h263dec.c @@ -0,0 +1,842 @@ +/* + * H.263 decoder + * Copyright (c) 2001 Fabrice Bellard. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/** + * @file h263dec.c + * H.263 decoder. + */ + +#include "avcodec.h" +#include "dsputil.h" +#include "mpegvideo.h" + +//#define DEBUG +//#define PRINT_FRAME_TIME +#ifdef PRINT_FRAME_TIME +static inline long long rdtsc() +{ + long long l; + asm volatile( "rdtsc\n\t" + : "=A" (l) + ); +// printf("%d\n", int(l/1000)); + return l; +} +#endif + +int ff_h263_decode_init(AVCodecContext *avctx) +{ + MpegEncContext *s = avctx->priv_data; + + s->avctx = avctx; + s->out_format = FMT_H263; + + s->width = avctx->width; + s->height = avctx->height; + s->workaround_bugs= avctx->workaround_bugs; + + // set defaults + s->quant_precision=5; + s->progressive_sequence=1; + s->decode_mb= ff_h263_decode_mb; + s->low_delay= 1; + avctx->pix_fmt= PIX_FMT_YUV420P; + + /* select sub codec */ + switch(avctx->codec->id) { + case CODEC_ID_H263: + s->gob_number = 0; + break; + case CODEC_ID_MPEG4: + s->time_increment_bits = 4; /* default value for broken headers */ + s->h263_pred = 1; + s->low_delay = 0; //default, might be overriden in the vol header during header parsing + break; + case CODEC_ID_MSMPEG4V1: + s->h263_msmpeg4 = 1; + s->h263_pred = 1; + s->msmpeg4_version=1; + break; + case CODEC_ID_MSMPEG4V2: + s->h263_msmpeg4 = 1; + s->h263_pred = 1; + s->msmpeg4_version=2; + break; + case CODEC_ID_MSMPEG4V3: + s->h263_msmpeg4 = 1; + s->h263_pred = 1; + s->msmpeg4_version=3; + break; + case CODEC_ID_WMV1: + s->h263_msmpeg4 = 1; + s->h263_pred = 1; + s->msmpeg4_version=4; + break; + case CODEC_ID_WMV2: + s->h263_msmpeg4 = 1; + s->h263_pred = 1; + s->msmpeg4_version=5; + break; + case CODEC_ID_H263I: + s->h263_intel = 1; + break; + case CODEC_ID_FLV1: + s->h263_flv = 1; + break; + default: + return -1; + } + s->codec_id= avctx->codec->id; + + /* for h263, we allocate the images after having read the header */ + if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4) + if (MPV_common_init(s) < 0) + return -1; + + if (s->h263_msmpeg4) + ff_msmpeg4_decode_init(s); + else + h263_decode_init_vlc(s); + + return 0; +} + +int ff_h263_decode_end(AVCodecContext *avctx) +{ + MpegEncContext *s = avctx->priv_data; + + MPV_common_end(s); + return 0; +} + +/** + * retunrs the number of bytes consumed for building the current frame + */ +static int get_consumed_bytes(MpegEncContext *s, int buf_size){ + int pos= (get_bits_count(&s->gb)+7)>>3; + + if(s->divx_packed){ + //we would have to scan through the whole buf to handle the weird reordering ... + return buf_size; + }else if(s->flags&CODEC_FLAG_TRUNCATED){ + pos -= s->parse_context.last_index; + if(pos<0) pos=0; // padding is not really read so this might be -1 + return pos; + }else{ + if(pos==0) pos=1; //avoid infinite loops (i doubt thats needed but ...) + if(pos+10>buf_size) pos=buf_size; // oops ;) + + return pos; + } +} + +static int decode_slice(MpegEncContext *s){ + const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F; + s->last_resync_gb= s->gb; + s->first_slice_line= 1; + + s->resync_mb_x= s->mb_x; + s->resync_mb_y= s->mb_y; + + s->y_dc_scale= s->y_dc_scale_table[ s->qscale ]; + s->c_dc_scale= s->c_dc_scale_table[ s->qscale ]; + + if(s->partitioned_frame){ + const int qscale= s->qscale; + + if(s->codec_id==CODEC_ID_MPEG4){ + if(ff_mpeg4_decode_partitions(s) < 0) + return -1; + } + + /* restore variables which were modified */ + s->first_slice_line=1; + s->mb_x= s->resync_mb_x; + s->mb_y= s->resync_mb_y; + s->qscale= qscale; + s->y_dc_scale= s->y_dc_scale_table[ s->qscale ]; + s->c_dc_scale= s->c_dc_scale_table[ s->qscale ]; + } + + for(; s->mb_y < s->mb_height; s->mb_y++) { + /* per-row end of slice checks */ + if(s->msmpeg4_version){ + if(s->resync_mb_y + s->slice_height == s->mb_y){ + 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); + + return 0; + } + } + + if(s->msmpeg4_version==1){ + s->last_dc[0]= + s->last_dc[1]= + s->last_dc[2]= 128; + } + + ff_init_block_index(s); + for(; s->mb_x < s->mb_width; s->mb_x++) { + int ret; + + ff_update_block_index(s); + + if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){ + s->first_slice_line=0; + } + + /* DCT & quantize */ + s->dsp.clear_blocks(s->block[0]); + + s->mv_dir = MV_DIR_FORWARD; + s->mv_type = MV_TYPE_16X16; +// s->mb_skiped = 0; +//printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24)); + ret= s->decode_mb(s, s->block); + + if (s->pict_type!=B_TYPE) + ff_h263_update_motion_val(s); + + if(ret<0){ + const int xy= s->mb_x + s->mb_y*s->mb_stride; + if(ret==SLICE_END){ + MPV_decode_mb(s, s->block); + +//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)); + ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask); + + s->padding_bug_score--; + + if(++s->mb_x >= s->mb_width){ + s->mb_x=0; + ff_draw_horiz_band(s, s->mb_y*16, 16); + s->mb_y++; + } + return 0; + }else if(ret==SLICE_NOEND){ + fprintf(stderr,"Slice mismatch at MB: %d\n", xy); + 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)&part_mask); + return -1; + } + fprintf(stderr,"Error at MB: %d\n", xy); + 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)&part_mask); + + return -1; + } + + MPV_decode_mb(s, s->block); + } + + ff_draw_horiz_band(s, s->mb_y*16, 16); + + s->mb_x= 0; + } + + assert(s->mb_x==0 && s->mb_y==s->mb_height); + + /* try to detect the padding bug */ + if( s->codec_id==CODEC_ID_MPEG4 + && (s->workaround_bugs&FF_BUG_AUTODETECT) + && s->gb.size_in_bits - get_bits_count(&s->gb) >=0 + && s->gb.size_in_bits - get_bits_count(&s->gb) < 48 +// && !s->resync_marker + && !s->data_partitioning){ + + const int bits_count= get_bits_count(&s->gb); + const int bits_left = s->gb.size_in_bits - bits_count; + + if(bits_left==0){ + s->padding_bug_score+=16; + }else if(bits_left>8){ + s->padding_bug_score++; + } else if(bits_left != 1){ + int v= show_bits(&s->gb, 8); + v|= 0x7F >> (7-(bits_count&7)); + + if(v==0x7F) + s->padding_bug_score--; + else + s->padding_bug_score++; + } + } + + // handle formats which dont have unique end markers + if(s->msmpeg4_version || (s->workaround_bugs&FF_BUG_NO_PADDING)){ //FIXME perhaps solve this more cleanly + int left= s->gb.size_in_bits - get_bits_count(&s->gb); + int max_extra=7; + + /* no markers in M$ crap */ + if(s->msmpeg4_version && s->pict_type==I_TYPE) + max_extra+= 17; + + /* buggy padding but the frame should still end approximately at the bitstream end */ + if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_resilience>=3) + max_extra+= 48; + else if((s->workaround_bugs&FF_BUG_NO_PADDING)) + max_extra+= 256*256*256*64; + + if(left>max_extra){ + fprintf(stderr, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24)); + } + else if(left<0){ + fprintf(stderr, "overreading %d bits\n", -left); + }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); + + return 0; + } + + fprintf(stderr, "slice end not reached but screenspace end (%d left %06X, score= %d)\n", + s->gb.size_in_bits - get_bits_count(&s->gb), + show_bits(&s->gb, 24), s->padding_bug_score); + + ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask); + + return -1; +} + +/** + * finds the end of the current frame in the bitstream. + * @return the position of the first byte of the next frame, or -1 + */ +static int mpeg4_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){ + ParseContext *pc= &s->parse_context; + int vop_found, i; + uint32_t state; + + vop_found= pc->frame_start_found; + state= pc->state; + + i=0; + if(!vop_found){ + for(i=0; iframe_start_found=0; + pc->state=-1; + return i-3; + } + } + } + pc->frame_start_found= vop_found; + pc->state= state; + return END_NOT_FOUND; +} + +static int h263_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){ + ParseContext *pc= &s->parse_context; + int vop_found, i; + uint32_t state; + + vop_found= pc->frame_start_found; + state= pc->state; + + i=0; + if(!vop_found){ + for(i=0; i>(32-22) == 0x20){ + i++; + vop_found=1; + break; + } + } + } + + if(vop_found){ + for(; i>(32-22) == 0x20){ + pc->frame_start_found=0; + pc->state=-1; + return i-3; + } + } + } + pc->frame_start_found= vop_found; + pc->state= state; + + return END_NOT_FOUND; +} + +int ff_h263_decode_frame(AVCodecContext *avctx, + void *data, int *data_size, + uint8_t *buf, int buf_size) +{ + MpegEncContext *s = avctx->priv_data; + int ret; + AVFrame *pict = data; + float new_aspect; + +#ifdef PRINT_FRAME_TIME +uint64_t time= rdtsc(); +#endif +#ifdef DEBUG + printf("*****frame %d size=%d\n", avctx->frame_number, buf_size); + printf("bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]); +#endif + s->flags= avctx->flags; + + *data_size = 0; + + /* no supplementary picture */ + if (buf_size == 0) { + /* special case for last picture */ + if (s->low_delay==0 && s->next_picture_ptr) { + *pict= *(AVFrame*)s->next_picture_ptr; + s->next_picture_ptr= NULL; + + *data_size = sizeof(AVFrame); + } + + return 0; + } + + if(s->flags&CODEC_FLAG_TRUNCATED){ + int next; + + if(s->codec_id==CODEC_ID_MPEG4){ + next= mpeg4_find_frame_end(s, buf, buf_size); + }else if(s->codec_id==CODEC_ID_H263){ + next= h263_find_frame_end(s, buf, buf_size); + }else{ + fprintf(stderr, "this codec doesnt support truncated bitstreams\n"); + return -1; + } + + if( ff_combine_frame(s, next, &buf, &buf_size) < 0 ) + return buf_size; + } + +retry: + + if(s->bitstream_buffer_size && buf_size<20){ //divx 5.01+ frame reorder + init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size*8); + }else + init_get_bits(&s->gb, buf, buf_size*8); + s->bitstream_buffer_size=0; + + if (!s->context_initialized) { + if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix + return -1; + } + + /* let's go :-) */ + if (s->msmpeg4_version==5) { + ret= ff_wmv2_decode_picture_header(s); + } else if (s->msmpeg4_version) { + ret = msmpeg4_decode_picture_header(s); + } else if (s->h263_pred) { + if(s->avctx->extradata_size && s->picture_number==0){ + GetBitContext gb; + + init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8); + ret = ff_mpeg4_decode_picture_header(s, &gb); + } + ret = ff_mpeg4_decode_picture_header(s, &s->gb); + + if(s->flags& CODEC_FLAG_LOW_DELAY) + s->low_delay=1; + } else if (s->h263_intel) { + ret = intel_h263_decode_picture_header(s); + } else if (s->h263_flv) { + ret = flv_h263_decode_picture_header(s); + } else { + ret = h263_decode_picture_header(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; + } + + avctx->has_b_frames= !s->low_delay; + + if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){ + if(s->avctx->stream_codec_tag == ff_get_fourcc("XVID") || + s->avctx->codec_tag == ff_get_fourcc("XVID") || s->avctx->codec_tag == ff_get_fourcc("XVIX")) + s->xvid_build= -1; +#if 0 + if(s->avctx->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==1 + && s->padding_bug_score > 0 && s->low_delay) // XVID with modified fourcc + s->xvid_build= -1; +#endif + } + + if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){ + if(s->avctx->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==0) + s->divx_version= 400; //divx 4 + } + + if(s->workaround_bugs&FF_BUG_AUTODETECT){ + s->workaround_bugs &= ~FF_BUG_NO_PADDING; + + if(s->padding_bug_score > -2 && !s->data_partitioning && (s->divx_version || !s->resync_marker)) + s->workaround_bugs |= FF_BUG_NO_PADDING; + + if(s->avctx->codec_tag == ff_get_fourcc("XVIX")) + s->workaround_bugs|= FF_BUG_XVID_ILACE; + + if(s->avctx->codec_tag == ff_get_fourcc("UMP4")){ + s->workaround_bugs|= FF_BUG_UMP4; + s->workaround_bugs|= FF_BUG_AC_VLC; + } + + if(s->divx_version>=500){ + s->workaround_bugs|= FF_BUG_QPEL_CHROMA; + } + + if(s->divx_version>502){ + s->workaround_bugs|= FF_BUG_QPEL_CHROMA2; + } + + if(s->xvid_build && s->xvid_build<=3) + s->padding_bug_score= 256*256*256*64; + + if(s->xvid_build && s->xvid_build<=1) + s->workaround_bugs|= FF_BUG_QPEL_CHROMA; + + if(s->xvid_build && s->xvid_build<=12) + s->workaround_bugs|= FF_BUG_EDGE; + +#define SET_QPEL_FUNC(postfix1, postfix2) \ + s->dsp.put_ ## postfix1 = ff_put_ ## postfix2;\ + s->dsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2;\ + s->dsp.avg_ ## postfix1 = ff_avg_ ## postfix2; + + if(s->lavc_build && s->lavc_build<4653) + s->workaround_bugs|= FF_BUG_STD_QPEL; + + if(s->lavc_build && s->lavc_build<4655) + s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE; + + if(s->lavc_build && s->lavc_build<4618){ + s->workaround_bugs|= FF_BUG_EDGE; + } + + if(s->divx_version) + s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE; +//printf("padding_bug_score: %d\n", s->padding_bug_score); + if(s->divx_version==501 && s->divx_build==20020416) + s->padding_bug_score= 256*256*256*64; + + if(s->divx_version && s->divx_version<500){ + s->workaround_bugs|= FF_BUG_EDGE; + } + +#if 0 + if(s->divx_version==500) + s->padding_bug_score= 256*256*256*64; + + /* very ugly XVID padding bug detection FIXME/XXX solve this differently + * lets hope this at least works + */ + if( s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==0 + && s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0) + s->workaround_bugs|= FF_BUG_NO_PADDING; + + if(s->lavc_build && s->lavc_build<4609) //FIXME not sure about the version num but a 4609 file seems ok + s->workaround_bugs|= FF_BUG_NO_PADDING; +#endif + } + + if(s->workaround_bugs& FF_BUG_STD_QPEL){ + SET_QPEL_FUNC(qpel_pixels_tab[0][ 5], qpel16_mc11_old_c) + SET_QPEL_FUNC(qpel_pixels_tab[0][ 7], qpel16_mc31_old_c) + SET_QPEL_FUNC(qpel_pixels_tab[0][ 9], qpel16_mc12_old_c) + SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c) + SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c) + SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c) + + SET_QPEL_FUNC(qpel_pixels_tab[1][ 5], qpel8_mc11_old_c) + SET_QPEL_FUNC(qpel_pixels_tab[1][ 7], qpel8_mc31_old_c) + SET_QPEL_FUNC(qpel_pixels_tab[1][ 9], qpel8_mc12_old_c) + SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c) + SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c) + SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c) + } + + if(avctx->debug & FF_DEBUG_BUGS) + printf("bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n", + s->workaround_bugs, s->lavc_build, s->xvid_build, s->divx_version, s->divx_build, + s->divx_packed ? "p" : ""); + +#if 0 // dump bits per frame / qp / complexity +{ + 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->aspected_height) + new_aspect= s->aspected_width*s->width / (float)(s->height*s->aspected_height); + else + new_aspect=0; + + if ( s->width != avctx->width || s->height != avctx->height + || ABS(new_aspect - avctx->aspect_ratio) > 0.001) { + /* H.263 could change picture size any time */ + MPV_common_end(s); + } + if (!s->context_initialized) { + avctx->width = s->width; + avctx->height = s->height; + avctx->aspect_ratio= new_aspect; + + goto retry; + } + + if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P)) + s->gob_index = ff_h263_get_gob_height(s); + + // for hurry_up==5 + s->current_picture.pict_type= s->pict_type; + s->current_picture.key_frame= s->pict_type == I_TYPE; + + /* skip b frames if we dont have reference frames */ + if(s->last_picture_ptr==NULL && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size); + /* skip b frames if we are in a hurry */ + if(avctx->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size); + /* skip everything if we are in a hurry>=5 */ + if(avctx->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 + + ff_er_frame_start(s); + + //the second part of the wmv2 header contains the MB skip bits which are stored in current_picture->mb_type + //which isnt available before MPV_frame_start() + if (s->msmpeg4_version==5){ + if(ff_wmv2_decode_secondary_picture_header(s) < 0) + return -1; + } + + /* decode each macroblock */ + s->mb_x=0; + s->mb_y=0; + + decode_slice(s); + while(s->mb_ymb_height){ + if(s->msmpeg4_version){ + if(s->mb_x!=0 || (s->mb_y%s->slice_height)!=0 || get_bits_count(&s->gb) > s->gb.size_in_bits) + 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); + } + + if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE) + if(msmpeg4_decode_ext_header(s, buf_size) < 0){ + s->error_status_table[s->mb_num-1]= AC_ERROR|DC_ERROR|MV_ERROR; + } + + /* divx 5.01+ bistream reorder stuff */ + if(s->codec_id==CODEC_ID_MPEG4 && s->bitstream_buffer_size==0 && s->divx_packed){ + 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; ibitstream_buffer, buf + current_pos, buf_size - current_pos); + s->bitstream_buffer_size= buf_size - current_pos; + } + } + } + + ff_er_frame_end(s); + + MPV_frame_end(s); + +assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type); +assert(s->current_picture.pict_type == s->pict_type); + if(s->pict_type==B_TYPE || s->low_delay){ + *pict= *(AVFrame*)&s->current_picture; + ff_print_debug_info(s, s->current_picture_ptr); + } else { + *pict= *(AVFrame*)&s->last_picture; + ff_print_debug_info(s, s->last_picture_ptr); + } + + /* 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 */ + if(s->last_picture_ptr || s->low_delay) + *data_size = sizeof(AVFrame); +#ifdef PRINT_FRAME_TIME +printf("%Ld\n", rdtsc()-time); +#endif + + return get_consumed_bytes(s, buf_size); +} + +static const AVOption mpeg4_decoptions[] = +{ + AVOPTION_SUB(avoptions_workaround_bug), + AVOPTION_END() +}; + +AVCodec mpeg4_decoder = { + "mpeg4", + CODEC_TYPE_VIDEO, + CODEC_ID_MPEG4, + sizeof(MpegEncContext), + ff_h263_decode_init, + NULL, + ff_h263_decode_end, + ff_h263_decode_frame, + CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED, + .options = mpeg4_decoptions, + .flush= ff_mpeg_flush, +}; + +AVCodec h263_decoder = { + "h263", + CODEC_TYPE_VIDEO, + CODEC_ID_H263, + sizeof(MpegEncContext), + ff_h263_decode_init, + NULL, + ff_h263_decode_end, + ff_h263_decode_frame, + CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED, + .flush= ff_mpeg_flush, +}; + +AVCodec msmpeg4v1_decoder = { + "msmpeg4v1", + CODEC_TYPE_VIDEO, + CODEC_ID_MSMPEG4V1, + sizeof(MpegEncContext), + ff_h263_decode_init, + NULL, + ff_h263_decode_end, + ff_h263_decode_frame, + CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, + mpeg4_decoptions, +}; + +AVCodec msmpeg4v2_decoder = { + "msmpeg4v2", + CODEC_TYPE_VIDEO, + CODEC_ID_MSMPEG4V2, + sizeof(MpegEncContext), + ff_h263_decode_init, + NULL, + ff_h263_decode_end, + ff_h263_decode_frame, + CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, + mpeg4_decoptions, +}; + +AVCodec msmpeg4v3_decoder = { + "msmpeg4", + CODEC_TYPE_VIDEO, + CODEC_ID_MSMPEG4V3, + sizeof(MpegEncContext), + ff_h263_decode_init, + NULL, + ff_h263_decode_end, + ff_h263_decode_frame, + CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, + .options = mpeg4_decoptions, +}; + +AVCodec wmv1_decoder = { + "wmv1", + CODEC_TYPE_VIDEO, + CODEC_ID_WMV1, + sizeof(MpegEncContext), + ff_h263_decode_init, + NULL, + ff_h263_decode_end, + ff_h263_decode_frame, + CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, + mpeg4_decoptions, +}; + +AVCodec h263i_decoder = { + "h263i", + CODEC_TYPE_VIDEO, + CODEC_ID_H263I, + sizeof(MpegEncContext), + ff_h263_decode_init, + NULL, + ff_h263_decode_end, + ff_h263_decode_frame, + CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, + mpeg4_decoptions, +}; + +AVCodec flv_decoder = { + "flv", + CODEC_TYPE_VIDEO, + CODEC_ID_FLV1, + sizeof(MpegEncContext), + ff_h263_decode_init, + NULL, + ff_h263_decode_end, + ff_h263_decode_frame, + CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 +};