Fixes ticket #3930
---
libavcodec/aacdec.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index 10c509b..ef820d2 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -630,6 +630,16 @@ static ChannelElement *get_che(AACContext *ac, int type,
int elem_id)
return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][1];
}
case 4:
+ /* Some streams incorrectly code 4.0 audio as
+ * SCE[0] CPE[0] LFE[0]
+ * instead of
+ * SCE[0] CPE[0] SCE[1].
+ * If we seem to have encountered such a stream, transfer
+ * the SCE[1] element to the LFE[0]'s mapping */
+ if (ac->tags_mapped == tags_per_config[ac->oc[1].m4ac.chan_config] - 1
&& (type == TYPE_LFE || type == TYPE_SCE)) {
+ ac->tags_mapped++;
+ return ac->tag_che_map[type][elem_id] = ac->che[TYPE_SCE][1];
+ }
if (ac->tags_mapped == 2 &&
ac->oc[1].m4ac.chan_config == 4 &&
type == TYPE_SCE) {
--
2.1.0.127.g0c72b98
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