Merge remote-tracking branch 'qatar/master'

* qatar/master: (21 commits)
  ipmovie: do not read audio packets before the codec is known
  truemotion2: check size before GetBitContext initialisation
  avio: Only do implicit network initialization for network protocols
  avio: Add an URLProtocol flag for indicating that a protocol uses network
  adpcm: ADPCM Electronic Arts has always two channels
  matroskadec: Fix a bug where a pointer was cached to an array that might later move due to a realloc()
  fate: Add missing reference file from 9b4767e4.
  mov: Support MOV_CH_LAYOUT_USE_DESCRIPTIONS for labeled descriptions.
  4xm: Prevent buffer overreads.
  mjpegdec: parse RSTn to prevent skipping other data in mjpeg_decode_scan
  vp3: add fate test for non-zero last coefficient
  vp3: fix streams with non-zero last coefficient
  swscale: remove unused U/V arguments from yuv2rgb_write().
  timer: K&R formatting cosmetics
  lavf: cosmetics, reformat av_read_frame().
  lavf: refactor av_read_frame() to make it easier to understand.
  Report an error if pitch_lag is zero in AMR-NB decoder.
  Revert "4xm: Prevent buffer overreads."
  4xm: Prevent buffer overreads.
  4xm: pass the correct remaining buffer size to decode_i2_frame().
  ...

Conflicts:
	libavcodec/4xm.c
	libavcodec/mjpegdec.c
	libavcodec/truemotion2.c
	libavformat/ipmovie.c
	libavformat/mov_chan.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 15 insertions, 7 deletions

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 6698b6a3a4..05521fd03e 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -576,7 +576,8 @@ static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 {
     AVStream *st;
     uint8_t version;
-    uint32_t flags, layout_tag, bitmap, num_descr;
+    uint32_t flags, layout_tag, bitmap, num_descr, label_mask;
+    int i;
 
     if (c->fc->nb_streams < 1)
         return 0;
@@ -598,9 +599,7 @@ static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     av_dlog(c->fc, "chan: size=%" PRId64 " version=%u flags=%u layout=%u bitmap=%u num_descr=%u\n",
             atom.size, version, flags, layout_tag, bitmap, num_descr);
 
-#if 0
-    /* TODO: use the channel descriptions if the layout tag is 0 */
-    int i;
+    label_mask = 0;
     for (i = 0; i < num_descr; i++) {
         uint32_t label, cflags;
         float coords[3];
@@ -609,10 +608,19 @@ static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         AV_WN32(&coords[0], avio_rl32(pb)); // mCoordinates[0]
         AV_WN32(&coords[1], avio_rl32(pb)); // mCoordinates[1]
         AV_WN32(&coords[2], avio_rl32(pb)); // mCoordinates[2]
+        if (layout_tag == 0) {
+            uint32_t mask_incr = ff_mov_get_channel_label(label);
+            if (mask_incr == 0) {
+                label_mask = 0;
+                break;
+            }
+            label_mask |= mask_incr;
+        }
     }
-#endif
-
-    st->codec->channel_layout = ff_mov_get_channel_layout(layout_tag, bitmap);
+    if (layout_tag == 0)
+        st->codec->channel_layout = label_mask;
+    else
+        st->codec->channel_layout = ff_mov_get_channel_layout(layout_tag, bitmap);
 
     return 0;
 }