Add routine that provides audio ID corresponding to logical number

in dvdnav stream.



git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27021 b3059339-0415-0410-9bf9-f77b7e298cf2

2 files changed, 33 insertions, 0 deletions

diff --git a/stream/stream_dvdnav.c b/stream/stream_dvdnav.c
index 080913baca..6e3ecb8902 100644
--- a/stream/stream_dvdnav.c
+++ b/stream/stream_dvdnav.c
@@ -682,6 +682,38 @@ void mp_dvdnav_update_mouse_pos(stream_t *stream, int32_t x, int32_t y, int* but
 }
 
 /**
+ * \brief mp_dvdnav_aid_from_audio_num() returns the audio id corresponding to the logical number
+ * \param stream: - stream pointer
+ * \param audio_num: - logical number
+ * \return -1 on error, current subtitle id if successful
+ */
+int mp_dvdnav_aid_from_audio_num(stream_t *stream, int audio_num) {
+  dvdnav_priv_t * priv = stream->priv;
+  int k;
+  uint8_t format, lg;
+
+  for(k=0; k<32; k++) {
+    lg = dvdnav_get_audio_logical_stream(priv->dvdnav, k);
+    if (lg == 0xff) continue;
+    if (lg != audio_num) continue;
+    format = dvdnav_audio_stream_format(priv->dvdnav, lg);
+    switch(format) {
+      case DVDNAV_FORMAT_AC3:
+        return k+128;
+      case DVDNAV_FORMAT_DTS:
+        return k+136;
+      case DVDNAV_FORMAT_LPCM:
+        return k+160;
+      case DVDNAV_FORMAT_MPEGAUDIO:
+        return k;
+      default:
+        return -1;
+    }
+  }
+  return -1;
+}
+
+/**
  * \brief mp_dvdnav_aid_from_lang() returns the audio id corresponding to the language code 'lang'
  * \param stream: - stream pointer
  * \param lang: 2-characters language code[s], eventually separated by spaces of commas
diff --git a/stream/stream_dvdnav.h b/stream/stream_dvdnav.h
index 6c155c7563..a7e3c90bd6 100644
--- a/stream/stream_dvdnav.h
+++ b/stream/stream_dvdnav.h
@@ -17,6 +17,7 @@ typedef struct {
 } nav_highlight_t;
 
 int mp_dvdnav_number_of_subs(stream_t *stream);
+int mp_dvdnav_aid_from_audio_num(stream_t *stream, int audio_num);
 int mp_dvdnav_aid_from_lang(stream_t *stream, unsigned char *language);
 int mp_dvdnav_lang_from_aid(stream_t *stream, int id, unsigned char *buf);
 int mp_dvdnav_sid_from_lang(stream_t *stream, unsigned char *language);