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mpv/demux_avi.c

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// AVI file parser for DEMUXER v2.6 by A'rpi/ESP-team
#include <stdio.h>
#include <stdlib.h>
extern int verbose; // defined in mplayer.c
#include "stream.h"
#include "demuxer.h"
#include "wine/mmreg.h"
#include "wine/avifmt.h"
#include "wine/vfw.h"
#include "codec-cfg.h"
#include "stheader.h"
//static float avi_pts_frametime=1.0f/25.0f;
float avi_audio_pts=0;
float avi_video_pts=0;
//float avi_video_ftime=0.04;
int skip_video_frames=0;
// Select ds from ID
demux_stream_t* demux_avi_select_stream(demuxer_t *demux,unsigned int id){
int stream_id=avi_stream_id(id);
// printf("demux_avi_select_stream(%d) {a:%d/v:%d}\n",stream_id,
// demux->audio->id,demux->video->id);
if(demux->video->id==-1)
if(demux->v_streams[stream_id])
demux->video->id=stream_id;
if(demux->audio->id==-1)
if(demux->a_streams[stream_id])
demux->audio->id=stream_id;
if(stream_id==demux->audio->id){
if(!demux->audio->sh){
demux->audio->sh=demux->a_streams[stream_id];
if(verbose) printf("Auto-selected AVI audio ID = %d\n",demux->audio->id);
}
return demux->audio;
}
if(stream_id==demux->video->id){
if(!demux->video->sh){
demux->video->sh=demux->v_streams[stream_id];
if(verbose) printf("Auto-selected AVI video ID = %d\n",demux->video->id);
}
return demux->video;
}
if(id!=mmioFOURCC('J','U','N','K')){
// unknown
if(verbose>=2) printf("Unknown chunk: %.4s (%X)\n",&id,id);
}
return NULL;
}
static int demux_avi_read_packet(demuxer_t *demux,unsigned int id,unsigned int len,int idxpos){
int skip;
float pts=0;
demux_stream_t *ds=demux_avi_select_stream(demux,id);
if(verbose>=3) printf("demux_avi.read_packet: %X\n",id);
if(ds==demux->audio){
pts=avi_audio_pts;
avi_audio_pts=0;
} else
if(ds==demux->video){
// video
if(skip_video_frames>0){
// drop frame (seeking)
--skip_video_frames;
ds=NULL;
} else {
pts=avi_video_pts;
}
// ezt a 2 sort lehet hogy fell kell majd cserelni:
//avi_video_pts+=avi_pts_frametime;
//avi_video_pts+=(float)avi_header.video.dwScale/(float)avi_header.video.dwRate;
//avi_video_pts+=((sh_video_t*)ds->sh)->frametime;
// FIXME!!!
avi_video_pts+=(float)((sh_video_t*)(demux->video->sh))->video.dwScale/(float)((sh_video_t*)(demux->video->sh))->video.dwRate;
// avi_video_pts+=avi_video_ftime;
avi_audio_pts=avi_video_pts;
}
// len=stream_read_dword_le(demux->stream);
skip=(len+1)&(~1); // total bytes in this chunk
if(ds){
if(verbose>=2) printf("DEMUX_AVI: Read %d data bytes from packet %04X\n",len,id);
ds_read_packet(ds,demux->stream,len,pts,idxpos);
skip-=len;
}
if(skip){
if(verbose>=2) printf("DEMUX_AVI: Skipping %d bytes from packet %04X\n",skip,id);
stream_skip(demux->stream,skip);
}
return ds?1:0;
}
//static int num_elementary_packets100=0;
//static int num_elementary_packets101=0;
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
int demux_avi_fill_buffer(demuxer_t *demux){
unsigned int id=0;
unsigned int len;
int max_packs=128;
int ret=0;
do{
AVIINDEXENTRY *idx=NULL;
demux->filepos=stream_tell(demux->stream);
if(demux->filepos>=demux->movi_end){
demux->stream->eof=1;
return 0;
}
if(stream_eof(demux->stream)) return 0;
if(demux->idx_size>0 && demux->idx_pos<demux->idx_size){
unsigned int pos;
//if(demux->idx_pos<0) printf("Fatal! idx_pos=%d\n",demux->idx_pos);
idx=&((AVIINDEXENTRY *)demux->idx)[demux->idx_pos++];
//printf("[%d]",demux->idx_pos);fflush(stdout);
//stream_seek(demux->stream,idx.dwChunkOffset);
//printf("IDX pos=%X idx.pos=%X idx.size=%X idx.flags=%X\n",demux->filepos,
// pos-4,idx->dwChunkLength,idx->dwFlags);
if(idx->dwFlags&AVIIF_LIST){
// LIST
continue;
}
if(!demux_avi_select_stream(demux,idx->ckid)){
if(verbose>2) printf("Skip chunk %.4s (0x%X) \n",&idx->ckid,idx->ckid);
continue; // skip this chunk
}
pos=idx->dwChunkOffset+demux->idx_offset;
if(pos<demux->movi_start || pos>=demux->movi_end){
printf("ChunkOffset out of range! current=0x%X idx=0x%X \n",demux->filepos,pos);
continue;
}
#if 0
if(pos!=demux->filepos){
printf("Warning! pos=0x%X idx.pos=0x%X diff=%d \n",demux->filepos,pos,pos-demux->filepos);
}
#endif
stream_seek(demux->stream,pos);
id=stream_read_dword_le(demux->stream);
if(id!=idx->ckid){
printf("ChunkID mismatch! raw=%.4s idx=%.4s \n",&id,&idx->ckid);
continue;
}
len=stream_read_dword_le(demux->stream);
// if((len&(~1))!=(idx->dwChunkLength&(~1))){
// if((len)!=(idx->dwChunkLength)){
if((len!=idx->dwChunkLength)&&((len+1)!=idx->dwChunkLength)){
printf("ChunkSize mismatch! raw=%d idx=%d \n",len,idx->dwChunkLength);
continue;
}
} else {
id=stream_read_dword_le(demux->stream);
len=stream_read_dword_le(demux->stream);
if(id==mmioFOURCC('L','I','S','T')){
id=stream_read_dword_le(demux->stream); // list type
continue;
}
}
ret=demux_avi_read_packet(demux,id,len,demux->idx_pos-1);
if(!ret && skip_video_frames<=0)
if(--max_packs==0){
demux->stream->eof=1;
printf("demux: file doesn't contain the selected audio or video stream\n");
return 0;
}
} while(ret!=1);
return 1;
}
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
int demux_avi_fill_buffer_ni(demuxer_t *demux,demux_stream_t* ds){
unsigned int id=0;
unsigned int len;
int max_packs=128;
int ret=0;
do{
AVIINDEXENTRY *idx=NULL;
int idx_pos=0;
demux->filepos=stream_tell(demux->stream);
if(ds==demux->video) idx_pos=demux->idx_pos_a++; else
if(ds==demux->audio) idx_pos=demux->idx_pos_v++; else
idx_pos=demux->idx_pos++;
if(demux->idx_size>0 && idx_pos<demux->idx_size){
unsigned int pos;
idx=&((AVIINDEXENTRY *)demux->idx)[idx_pos];
// idx=&demux->idx[idx_pos];
if(idx->dwFlags&AVIIF_LIST){
// LIST
continue;
}
if(ds && demux_avi_select_stream(demux,idx->ckid)!=ds){
if(verbose>2) printf("Skip chunk %.4s (0x%X) \n",&idx->ckid,idx->ckid);
continue; // skip this chunk
}
pos=idx->dwChunkOffset+demux->idx_offset;
if(pos<demux->movi_start || pos>=demux->movi_end){
printf("ChunkOffset out of range! current=0x%X idx=0x%X \n",demux->filepos,pos);
continue;
}
#if 0
if(pos!=demux->filepos){
printf("Warning! pos=0x%X idx.pos=0x%X diff=%d \n",demux->filepos,pos,pos-demux->filepos);
}
#endif
stream_seek(demux->stream,pos);
id=stream_read_dword_le(demux->stream);
if(stream_eof(demux->stream)) return 0;
if(id!=idx->ckid){
printf("ChunkID mismatch! raw=%.4s idx=%.4s \n",&id,&idx->ckid);
continue;
}
len=stream_read_dword_le(demux->stream);
// if((len&(~1))!=(idx->dwChunkLength&(~1))){
// if((len)!=(idx->dwChunkLength)){
if((len!=idx->dwChunkLength)&&((len+1)!=idx->dwChunkLength)){
printf("ChunkSize mismatch! raw=%d idx=%d \n",len,idx->dwChunkLength);
continue;
}
} else return 0;
ret=demux_avi_read_packet(demux,id,len,idx_pos);
if(!ret && skip_video_frames<=0)
if(--max_packs==0){
demux->stream->eof=1;
printf("demux: file doesn't contain the selected audio or video stream\n");
return 0;
}
} while(ret!=1);
return 1;
}
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
int demux_avi_fill_buffer_nini(demuxer_t *demux,demux_stream_t* ds){
unsigned int id=0;
unsigned int len;
int ret=0;
int *fpos=NULL;
if(ds==demux->video) fpos=&demux->idx_pos_a; else
if(ds==demux->audio) fpos=&demux->idx_pos_v; else
return 0;
stream_seek(demux->stream,fpos[0]);
do{
demux->filepos=stream_tell(demux->stream);
if(demux->filepos>=demux->movi_end){
demux->stream->eof=1;
return 0;
}
if(stream_eof(demux->stream)) return 0;
id=stream_read_dword_le(demux->stream);
len=stream_read_dword_le(demux->stream);
if(id==mmioFOURCC('L','I','S','T')){
id=stream_read_dword_le(demux->stream); // list type
continue;
}
if(ds==demux_avi_select_stream(demux,id)){
// read it!
ret=demux_avi_read_packet(demux,id,len,demux->idx_pos-1);
} else {
// skip it!
int skip=(len+1)&(~1); // total bytes in this chunk
stream_skip(demux->stream,skip);
}
} while(ret!=1);
fpos[0]=stream_tell(demux->stream);
return 1;
}
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