oggdec: simplify audio chained ogg streams support

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

libavformat/oggdec.c

@@ -164,7 +164,6 @@ ogg_new_stream (AVFormatContext * s, uint32_t serial)
     os->bufsize = DECODER_BUFFER_SIZE;
     os->buf = av_malloc(os->bufsize);
     os->header = -1;
-    os->page_begin = 1;
 
     st = av_new_stream (s, idx);
     if (!st)
@@ -242,8 +241,7 @@ ogg_read_page (AVFormatContext * s, int *str)
 
     idx = ogg_find_stream (ogg, serial);
     if (idx < 0){
-        for (i = 0; i < ogg->nstreams; i++) {
+        if (ogg->headers) {
-            if (!ogg->streams[i].page_begin) {
                 int n;
 
                 for (n = 0; n < ogg->nstreams; n++) {
@@ -252,8 +250,6 @@ ogg_read_page (AVFormatContext * s, int *str)
                 }
                 ogg->curidx   = -1;
                 ogg->nstreams = 0;
-                break;
-            }
         }
         idx = ogg_new_stream (s, serial);
         if (idx < 0)
@@ -261,8 +257,6 @@ ogg_read_page (AVFormatContext * s, int *str)
     }
 
     os = ogg->streams + idx;
-    if (!(flags & OGG_FLAG_BOS))
-        os->page_begin = 0;
     os->page_pos = avio_tell(bc) - 27;
 
     if(os->psize > 0)

libavformat/oggdec.h

@@ -75,7 +75,6 @@ struct ogg_stream {
     int incomplete; ///< whether we're expecting a continuation in the next page
     int page_end;   ///< current packet is the last one completed in the page
     int keyframe_seek;
-    int page_begin; ///< set to 1 if the stream only received a begin-of-stream packet, otherwise 0
     void *private;
 };