[MPlayer-dev-eng] [PATCH] Switch audio control in OGG demuxer

[ubitux]

On Sun, Apr 11, 2010 at 09:07:33PM +0200, Reimar Döffinger wrote:
> That's wrong, only if the argument is -1 it should switch to the "next",
> otherwise it should switch to the one specified.

Oh sorry about that. Is this better?

-- 
ubitux
-------------- next part --------------
Index: libmpdemux/demux_ogg.c
===================================================================
--- libmpdemux/demux_ogg.c	(revision 31029)
+++ libmpdemux/demux_ogg.c	(working copy)
@@ -39,6 +39,8 @@
 #define FOURCC_SPEEX  mmioFOURCC('s', 'p', 'x', ' ')
 #define FOURCC_THEORA mmioFOURCC('t', 'h', 'e', 'o')
 
+#define STREAM_IS_AUDIO(stream) ((stream)->vorbis || (stream)->speex || (stream)->flac)
+
 #ifdef CONFIG_TREMOR
 #include <tremor/ogg.h>
 #include <tremor/ivorbiscodec.h>
@@ -1568,6 +1570,48 @@
 	    *(int *)arg=((os->lastpos - ogg_d->initial_granulepos)*100) / ogg_d->duration;
 	    return DEMUXER_CTRL_OK;
 
+        case DEMUXER_CTRL_SWITCH_AUDIO:
+        {
+            int n;
+            int id = *(int*)arg;
+
+            if (id == -1) {
+                /* Select next audio stream */
+                int next_stream_id = demuxer->audio->id;
+
+                for (n = 0; n < ogg_d->num_sub; n++) {
+                    ogg_stream_t *ostream;
+
+                    next_stream_id++;
+                    if (next_stream_id == ogg_d->num_sub)
+                        next_stream_id = 0;
+                    ostream = &ogg_d->subs[next_stream_id];
+                    if (STREAM_IS_AUDIO(ostream)) {
+                        demuxer->audio->id = next_stream_id;
+                        break;
+                    }
+                }
+
+            } else {
+                /* Select specified audio stream */
+                int n_audio = 0;
+
+                for (n = 0; n < ogg_d->num_sub; n++) {
+                    ogg_stream_t *ostream = &ogg_d->subs[n];
+
+                    if (STREAM_IS_AUDIO(ostream)) {
+                        if (n_audio == id) {
+                            demuxer->audio->id = n;
+                            break;
+                        }
+                        n_audio++;
+                    }
+                }
+            }
+
+            return DEMUXER_CTRL_OK;
+        }
+
 	default:
 	    return DEMUXER_CTRL_NOTIMPL;
     }