[FFmpeg-cvslog] avcodec/aacdec: fix parsing of dual mono files
James Almer
git at videolan.org
Fri Jul 8 16:06:34 EEST 2022
ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Tue Jul 5 12:49:29 2022 -0300| [f9785a78da117be0c66f6d5d58ce7277c7029ae7] | committer: James Almer
avcodec/aacdec: fix parsing of dual mono files
Dual mono files report a channel count of 2 with each individual channel in its
own SCE, instead of both in a single CPE as is the case with standard stereo.
This commit handles this non default channel configuration scenario.
Fixes ticket #1614
Signed-off-by: James Almer <jamrial at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f9785a78da117be0c66f6d5d58ce7277c7029ae7
---
libavcodec/aacdec_template.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/libavcodec/aacdec_template.c b/libavcodec/aacdec_template.c
index 0135cb35df..10fba3d3b2 100644
--- a/libavcodec/aacdec_template.c
+++ b/libavcodec/aacdec_template.c
@@ -701,14 +701,15 @@ static ChannelElement *get_che(AACContext *ac, int type, int elem_id)
av_log(ac->avctx, AV_LOG_DEBUG, "stereo with SCE\n");
- if (set_default_channel_config(ac, ac->avctx, layout_map,
- &layout_map_tags, 1) < 0)
- return NULL;
+ layout_map_tags = 2;
+ layout_map[0][0] = layout_map[1][0] = TYPE_SCE;
+ layout_map[0][2] = layout_map[1][2] = AAC_CHANNEL_FRONT;
+ layout_map[0][1] = 0;
+ layout_map[1][1] = 1;
if (output_configure(ac, layout_map, layout_map_tags,
OC_TRIAL_FRAME, 1) < 0)
return NULL;
- ac->oc[1].m4ac.chan_config = 1;
if (ac->oc[1].m4ac.sbr)
ac->oc[1].m4ac.ps = -1;
}
@@ -786,8 +787,10 @@ static ChannelElement *get_che(AACContext *ac, int type, int elem_id)
type == TYPE_CPE) {
ac->tags_mapped++;
return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][0];
- } else if (ac->oc[1].m4ac.chan_config == 2) {
- return NULL;
+ } else if (ac->tags_mapped == 1 && ac->oc[1].m4ac.chan_config == 2 &&
+ type == TYPE_SCE) {
+ ac->tags_mapped++;
+ return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
}
case 1:
if (!ac->tags_mapped && type == TYPE_SCE) {
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