From d34041569e71fc9bd772354e94dc9d16061072a5 Mon Sep 17 00:00:00 2001
From: arpi_esp <arpi_esp@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Sat, 24 Feb 2001 20:28:24 +0000
Subject: Initial revision

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 aviheader.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 aviheader.c

(limited to 'aviheader.c')

diff --git a/aviheader.c b/aviheader.c
new file mode 100644
index 0000000000..9fd8c220c1
--- /dev/null
+++ b/aviheader.c
@@ -0,0 +1,89 @@
+
+#define MIN(a,b) (((a)<(b))?(a):(b))
+
+void read_avi_header(int no_index){
+
+int stream_id=-1;
+
+//---- AVI header:
+avi_header.idx_size=0;
+while(1){
+  int id=stream_read_dword_le(demuxer->stream);
+  int chunksize,size2;
+  static int last_fccType=0;
+  //
+  if(stream_eof(demuxer->stream)) break;
+  //
+  if(id==mmioFOURCC('L','I','S','T')){
+    int len=stream_read_dword_le(demuxer->stream)-4; // list size
+    id=stream_read_dword_le(demuxer->stream);        // list type
+    if(verbose>=2) printf("LIST %.4s  len=%d\n",&id,len);
+    if(id==listtypeAVIMOVIE){
+      // found MOVI header
+      avi_header.movi_start=stream_tell(demuxer->stream);
+      avi_header.movi_end=avi_header.movi_start+len;
+      if(verbose>=1) printf("Found movie at 0x%X - 0x%X\n",avi_header.movi_start,avi_header.movi_end);
+      len=(len+1)&(~1);
+      stream_skip(demuxer->stream,len);
+    }
+    continue;
+  }
+  size2=stream_read_dword_le(demuxer->stream);
+  if(verbose>=2) printf("CHUNK %.4s  len=%d\n",&id,size2);
+  chunksize=(size2+1)&(~1);
+  switch(id){
+    case ckidAVIMAINHDR:          // read 'avih'
+      stream_read(demuxer->stream,(char*) &avi_header.avih,MIN(size2,sizeof(avi_header.avih)));
+      chunksize-=MIN(size2,sizeof(avi_header.avih));
+      if(verbose) print_avih(&avi_header.avih);
+      break;
+    case ckidSTREAMHEADER: {      // read 'strh'
+      AVIStreamHeader h;
+      stream_read(demuxer->stream,(char*) &h,MIN(size2,sizeof(h)));
+      chunksize-=MIN(size2,sizeof(h));
+      if(h.fccType==streamtypeVIDEO) memcpy(&avi_header.video,&h,sizeof(h));else
+      if(h.fccType==streamtypeAUDIO) memcpy(&avi_header.audio,&h,sizeof(h));
+      last_fccType=h.fccType;
+      if(verbose>=1) print_strh(&h);
+	  ++stream_id;
+      break; }
+    case ckidSTREAMFORMAT: {      // read 'strf'
+      if(last_fccType==streamtypeVIDEO){
+        stream_read(demuxer->stream,(char*) &avi_header.bih,MIN(size2,sizeof(avi_header.bih)));
+        chunksize-=MIN(size2,sizeof(avi_header.bih));
+//        init_video_codec();
+//        init_video_out();
+        if(demuxer->video->id==-1) demuxer->video->id=stream_id;
+      } else
+      if(last_fccType==streamtypeAUDIO){
+        int z=(chunksize<64)?chunksize:64;
+        if(verbose>=2) printf("found 'wf', %d bytes of %d\n",chunksize,sizeof(WAVEFORMATEX));
+        stream_read(demuxer->stream,(char*) &avi_header.wf_ext,z);
+        chunksize-=z;
+        if(verbose>=1) print_wave_header((WAVEFORMATEX*)&avi_header.wf_ext);
+//        init_audio_codec();
+//        init_audio_out();
+        if(demuxer->audio->id==-1) demuxer->audio->id=stream_id;
+      }
+      break;
+    }
+    case ckidAVINEWINDEX: if(!no_index){
+      avi_header.idx_size=size2>>4;
+      if(verbose>=1) printf("Reading INDEX block, %d chunks for %d frames\n",
+        avi_header.idx_size,avi_header.avih.dwTotalFrames);
+      avi_header.idx=malloc(avi_header.idx_size<<4);
+      stream_read(demuxer->stream,(char*)avi_header.idx,avi_header.idx_size<<4);
+      chunksize-=avi_header.idx_size<<4;
+      if(verbose>=2) print_index();
+      break;
+    }
+  }
+  if(chunksize>0) stream_skip(demuxer->stream,chunksize); else
+  if(chunksize<0) printf("WARNING!!! chunksize=%d  (id=%.4s)\n",chunksize,&id);
+  
+}
+
+}
+
+#undef MIN
+
-- 
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