avutil/channel_layout: fix av_channel_layout_describe_bprint with custom and ambisonic channels

bp->len cannot be used to detect if try_describe_ambisonic was successful
because the bprint buffer might contain other data as well.

Also describing an invalid ambisonic layout should not return 0 but
AVERROR(EINVAL) instead, so change try_describe_ambisonic to actually return
error on invalid ambisonics. This also allows us to fix the first issue.

Signed-off-by: Marton Balint <cus@passwd.hu>

0 files changed, 0 insertions, 0 deletions