[SCM] libav/experimental: truehd: support up to 3 substreams.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 932cee5d6730c1358cb564ee0c84423ddd9ab21c
Author: Ramiro Polla <ramiro.polla at gmail.com>
Date:   Fri Mar 20 13:02:15 2009 +0000

    truehd: support up to 3 substreams.
    
    Originally committed as revision 18072 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/mlp.h b/libavcodec/mlp.h
index 032a8f6..c19b699 100644
--- a/libavcodec/mlp.h
+++ b/libavcodec/mlp.h
@@ -34,10 +34,10 @@
  */
 #define MAX_MATRICES        15
 
-/** Maximum number of substreams that can be decoded. This could also be set
- *  higher, but I haven't seen any examples with more than two.
+/** Maximum number of substreams that can be decoded.
+ *  MLP's limit is 2. TrueHD supports at least up to 3.
  */
-#define MAX_SUBSTREAMS      2
+#define MAX_SUBSTREAMS      3
 
 /** maximum sample frequency seen in files */
 #define MAX_SAMPLERATE      192000
diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c
index 6b825cd..c714500 100644
--- a/libavcodec/mlpdec.c
+++ b/libavcodec/mlpdec.c
@@ -280,6 +280,10 @@ static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb)
 
     if (mh.num_substreams == 0)
         return -1;
+    if (m->avctx->codec_id == CODEC_ID_MLP && mh.num_substreams > 2) {
+        av_log(m->avctx, AV_LOG_ERROR, "MLP only supports up to 2 substreams.\n");
+        return -1;
+    }
     if (mh.num_substreams > MAX_SUBSTREAMS) {
         av_log(m->avctx, AV_LOG_ERROR,
                "Number of substreams %d is larger than the maximum supported "

-- 
Libav/FFmpeg packaging