A 128 byte buffer may not be enough for some layouts with lots of channels.
Signed-off-by: James Almer <jamr...@gmail.com>
---
libavutil/opt.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/libavutil/opt.c b/libavutil/opt.c
index 0908751752..814b485a15 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -936,9 +936,15 @@ FF_DISABLE_DEPRECATION_WARNINGS
break;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
- case AV_OPT_TYPE_CHLAYOUT:
- ret = av_channel_layout_describe(dst, buf, sizeof(buf));
- break;
+ case AV_OPT_TYPE_CHLAYOUT: {
+ AVBPrint bp;
+ av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);
+ av_channel_layout_describe_bprint(dst, &bp);
+ if (!av_bprint_is_complete(&bp))
+ return AVERROR(ENOMEM);
+ av_bprint_finalize(&bp, (char **)out_val);
+ return *out_val ? 0 : AVERROR(ENOMEM);
+ }
case AV_OPT_TYPE_DICT:
if (!*(AVDictionary **)dst && (search_flags & AV_OPT_ALLOW_NULL)) {
*out_val = NULL;
--
2.43.0
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