Simply masking the LFE bit is more natural than subtracting
if set.
Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com>
---
libavcodec/ac3enc.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index 1a65e35161..31b9474822 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -2199,10 +2199,8 @@ static av_cold void set_channel_info(AVCodecContext
*avctx)
s->channels = channels;
s->fbw_channels = channels - s->lfe_on;
s->lfe_channel = s->lfe_on ? s->fbw_channels + 1 : -1;
- if (s->lfe_on)
- mask -= AV_CH_LOW_FREQUENCY;
- switch (mask) {
+ switch (mask & ~AV_CH_LOW_FREQUENCY) {
case AV_CH_LAYOUT_MONO: s->channel_mode = AC3_CHMODE_MONO;
break;
case AV_CH_LAYOUT_STEREO: s->channel_mode = AC3_CHMODE_STEREO;
break;
case AV_CH_LAYOUT_SURROUND: s->channel_mode = AC3_CHMODE_3F;
break;
--
2.40.1
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