X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Feac3dec.c;h=3a5c7989b93bee7673c607afc2d45b82b9a28ab4;hb=252500a78fe1a31abc79e6070d16f50382c39343;hp=fe97d2903261b566dc18f00e93568130e53636bf;hpb=22219a3ac46ac18f797c94e4619a34728556786c;p=ffmpeg

diff --git a/libavcodec/eac3dec.c b/libavcodec/eac3dec.c
index fe97d290326..3a5c7989b93 100644
--- a/libavcodec/eac3dec.c
+++ b/libavcodec/eac3dec.c
@@ -31,12 +31,6 @@
  *     No known samples exist.  The spec also does not give clear information
  *     on how this is to be implemented.
  *
- * Dependent Streams
- *     Only the independent stream is currently decoded. Any dependent
- *     streams are skipped.  We have only come across two examples of this, and
- *     they are both just test streams, one for HD-DVD and the other for
- *     Blu-ray.
- *
  * Transient Pre-noise Processing
  *     This is side information which a decoder should use to reduce artifacts
  *     caused by transients.  There are samples which are known to have this
@@ -349,8 +343,18 @@ static int ff_eac3_parse_header(AC3DecodeContext *s)
     /* dependent stream channel map */
     if (s->frame_type == EAC3_FRAME_TYPE_DEPENDENT) {
         if (get_bits1(gbc)) {
-            s->channel_map = get_bits(gbc, 16);
-            av_log(s->avctx, AV_LOG_DEBUG, "channel_map: %0X\n", s->channel_map);
+            int64_t channel_layout = 0;
+            int channel_map = get_bits(gbc, 16);
+            av_log(s->avctx, AV_LOG_DEBUG, "channel_map: %0X\n", channel_map);
+
+            for (i = 0; i < 16; i++)
+                if (channel_map & (1 << (EAC3_MAX_CHANNELS - i - 1)))
+                    channel_layout |= ff_eac3_custom_channel_map_locations[i][1];
+
+            if (av_popcount64(channel_layout) > EAC3_MAX_CHANNELS) {
+                return AVERROR_INVALIDDATA;
+            }
+            s->channel_map = channel_map;
         }
     }