mirror of https://github.com/mpv-player/mpv
226 lines
7.6 KiB
C
226 lines
7.6 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "config.h"
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extern int verbose; // defined in mplayer.c
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#include "stream.h"
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#include "demuxer.h"
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#include "wine/mmreg.h"
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#include "wine/avifmt.h"
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#include "wine/vfw.h"
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#include "codec-cfg.h"
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#include "bswap.h"
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#include "stheader.h"
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#include "aviheader.h"
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#define MIN(a,b) (((a)<(b))?(a):(b))
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static MainAVIHeader avih;
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extern void print_avih(MainAVIHeader *h);
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extern void print_avih_flags(MainAVIHeader *h);
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extern void print_strh(AVIStreamHeader *h);
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extern void print_wave_header(WAVEFORMATEX *h);
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extern void print_index(AVIINDEXENTRY *idx,int idx_size);
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void read_avi_header(demuxer_t *demuxer,int index_mode){
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sh_audio_t *sh_audio=NULL;
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sh_video_t *sh_video=NULL;
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int stream_id=-1;
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int idxfix_videostream=0;
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int idxfix_divx=0;
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avi_priv_t* priv=demuxer->priv;
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//---- AVI header:
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priv->idx_size=0;
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while(1){
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int id=stream_read_dword_le(demuxer->stream);
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int chunksize,size2;
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static int last_fccType=0;
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//
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if(stream_eof(demuxer->stream)) break;
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//
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if(id==mmioFOURCC('L','I','S','T')){
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int len=stream_read_dword_le(demuxer->stream)-4; // list size
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id=stream_read_dword_le(demuxer->stream); // list type
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if(verbose>=2) printf("LIST %.4s len=%d\n",(char *) &id,len);
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if(id==listtypeAVIMOVIE){
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// found MOVI header
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demuxer->movi_start=stream_tell(demuxer->stream);
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demuxer->movi_end=demuxer->movi_start+len;
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if(verbose>=1) printf("Found movie at 0x%X - 0x%X\n",demuxer->movi_start,demuxer->movi_end);
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if(index_mode==-2) break; // reading from non-seekable source (stdin)
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len=(len+1)&(~1);
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stream_skip(demuxer->stream,len);
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}
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continue;
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}
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size2=stream_read_dword_le(demuxer->stream);
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if(verbose>=2) printf("CHUNK %.4s len=%d\n",(char *) &id,size2);
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chunksize=(size2+1)&(~1);
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switch(id){
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case ckidAVIMAINHDR: // read 'avih'
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stream_read(demuxer->stream,(char*) &avih,MIN(size2,sizeof(avih)));
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le2me_MainAVIHeader(&avih); // swap to machine endian
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chunksize-=MIN(size2,sizeof(avih));
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if(verbose) print_avih(&avih); else print_avih_flags(&avih);
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break;
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case ckidSTREAMHEADER: { // read 'strh'
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AVIStreamHeader h;
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stream_read(demuxer->stream,(char*) &h,MIN(size2,sizeof(h)));
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le2me_AVIStreamHeader(&h); // swap to machine endian
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chunksize-=MIN(size2,sizeof(h));
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++stream_id;
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if(h.fccType==streamtypeVIDEO){
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sh_video=new_sh_video(demuxer,stream_id);
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memcpy(&sh_video->video,&h,sizeof(h));
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} else
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if(h.fccType==streamtypeAUDIO){
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sh_audio=new_sh_audio(demuxer,stream_id);
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memcpy(&sh_audio->audio,&h,sizeof(h));
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}
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last_fccType=h.fccType;
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if(verbose>=1) print_strh(&h);
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break; }
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case ckidSTREAMFORMAT: { // read 'strf'
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if(last_fccType==streamtypeVIDEO){
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sh_video->bih=calloc((chunksize<sizeof(BITMAPINFOHEADER))?sizeof(BITMAPINFOHEADER):chunksize,1);
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// sh_video->bih=malloc(chunksize); memset(sh_video->bih,0,chunksize);
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if(verbose>=1) printf("found 'bih', %d bytes of %d\n",chunksize,sizeof(BITMAPINFOHEADER));
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stream_read(demuxer->stream,(char*) sh_video->bih,chunksize);
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le2me_BITMAPINFOHEADER(sh_video->bih); // swap to machine endian
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chunksize=0;
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// sh_video->fps=(float)sh_video->video.dwRate/(float)sh_video->video.dwScale;
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// sh_video->frametime=(float)sh_video->video.dwScale/(float)sh_video->video.dwRate;
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// if(demuxer->video->id==-1) demuxer->video->id=stream_id;
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// IdxFix:
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idxfix_videostream=stream_id;
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switch(sh_video->bih->biCompression){
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case mmioFOURCC('D', 'I', 'V', '3'):
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case mmioFOURCC('d', 'i', 'v', '3'):
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case mmioFOURCC('D', 'I', 'V', '4'):
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case mmioFOURCC('d', 'i', 'v', '4'):
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case mmioFOURCC('D', 'I', 'V', '5'):
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case mmioFOURCC('d', 'i', 'v', '5'):
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case mmioFOURCC('D', 'I', 'V', '6'):
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case mmioFOURCC('d', 'i', 'v', '6'):
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case mmioFOURCC('M', 'P', '4', '3'):
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case mmioFOURCC('m', 'p', '4', '3'):
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case mmioFOURCC('M', 'P', '4', '2'):
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case mmioFOURCC('m', 'p', '4', '2'):
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case mmioFOURCC('D', 'I', 'V', '2'):
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case mmioFOURCC('A', 'P', '4', '1'):
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idxfix_divx=1; // we can fix keyframes only for divx coded files!
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}
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} else
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if(last_fccType==streamtypeAUDIO){
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int wf_size = chunksize<sizeof(WAVEFORMATEX)?sizeof(WAVEFORMATEX):chunksize;
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sh_audio->wf=calloc(wf_size,1);
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// sh_audio->wf=malloc(chunksize); memset(sh_audio->wf,0,chunksize);
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if(verbose>=1) printf("found 'wf', %d bytes of %d\n",chunksize,sizeof(WAVEFORMATEX));
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stream_read(demuxer->stream,(char*) sh_audio->wf,chunksize);
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le2me_WAVEFORMATEX(sh_audio->wf);
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if (sh_audio->wf->cbSize != 0 &&
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wf_size < sizeof(WAVEFORMATEX)+sh_audio->wf->cbSize) {
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sh_audio->wf=realloc(sh_audio->wf, sizeof(WAVEFORMATEX)+sh_audio->wf->cbSize);
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}
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chunksize=0;
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if(verbose>=1) print_wave_header(sh_audio->wf);
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// if(demuxer->audio->id==-1) demuxer->audio->id=stream_id;
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}
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break;
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}
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case ckidAVINEWINDEX: if(index_mode){
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int i;
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priv->idx_size=size2>>4;
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if(verbose>=1) printf("Reading INDEX block, %d chunks for %ld frames\n",
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priv->idx_size,avih.dwTotalFrames);
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priv->idx=malloc(priv->idx_size<<4);
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stream_read(demuxer->stream,(char*)priv->idx,priv->idx_size<<4);
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for (i = 0; i < priv->idx_size; i++) // swap index to machine endian
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le2me_AVIINDEXENTRY((AVIINDEXENTRY*)priv->idx + i);
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chunksize-=priv->idx_size<<4;
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if(verbose>=2) print_index(priv->idx,priv->idx_size);
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break;
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}
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}
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if(chunksize>0) stream_skip(demuxer->stream,chunksize); else
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if(chunksize<0) printf("WARNING!!! chunksize=%d (id=%.4s)\n",chunksize,(char *) &id);
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}
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if(index_mode>=2 || (priv->idx_size==0 && index_mode==1)){
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// build index for file:
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stream_reset(demuxer->stream);
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stream_seek(demuxer->stream,demuxer->movi_start);
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priv->idx_pos=0;
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priv->idx_size=0;
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priv->idx=NULL;
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while(1){
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int id,len,skip;
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AVIINDEXENTRY* idx;
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unsigned char c;
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demuxer->filepos=stream_tell(demuxer->stream);
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if(demuxer->filepos>=demuxer->movi_end) break;
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id=stream_read_dword_le(demuxer->stream);
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len=stream_read_dword_le(demuxer->stream);
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if(id==mmioFOURCC('L','I','S','T')){
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id=stream_read_dword_le(demuxer->stream); // list type
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continue;
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}
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if(stream_eof(demuxer->stream)) break;
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if(!id || avi_stream_id(id)==100) goto skip_chunk; // bad ID (or padding?)
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if(priv->idx_pos<=priv->idx_size){
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// priv->idx_size+=32;
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priv->idx_size+=1024; // +16kB
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priv->idx=realloc(priv->idx,priv->idx_size*sizeof(AVIINDEXENTRY));
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if(!priv->idx){priv->idx_pos=0; break;} // error!
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}
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idx=&((AVIINDEXENTRY *)priv->idx)[priv->idx_pos++];
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idx->ckid=id;
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idx->dwFlags=AVIIF_KEYFRAME; // FIXME
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idx->dwChunkOffset=demuxer->filepos;
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idx->dwChunkLength=len;
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c=stream_read_char(demuxer->stream);
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// Fix keyframes for DivX files:
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if(idxfix_divx)
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if(avi_stream_id(id)==idxfix_videostream){
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if(c&0x40) idx->dwFlags=0;
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}
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if(verbose>=2) printf("%08X %08X %.4s %02X %X\n",demuxer->filepos,id,(char *) &id,c,(unsigned int) idx->dwFlags);
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#if 0
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{ unsigned char tmp[64];
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int i;
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stream_read(demuxer->stream,tmp,64);
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printf("%.4s",&id);
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for(i=0;i<64;i++) printf(" %02X",tmp[i]);
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printf("\n");
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}
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#endif
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skip_chunk:
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skip=(len+1)&(~1); // total bytes in this chunk
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stream_seek(demuxer->stream,8+demuxer->filepos+skip);
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}
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priv->idx_size=priv->idx_pos;
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printf("AVI: Generated index table for %d chunks!\n",priv->idx_size);
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}
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}
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#undef MIN
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