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swresample/rematrix: support mixing top front left/right channels

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Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer
2022-10-30 20:47:36 -03:00
parent 6228ba141d
commit c79b16306f
1 changed files with 24 additions and 0 deletions
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24
libswresample/rematrix.c
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@@ -138,6 +138,8 @@ static int sane_layout(AVChannelLayout *ch_layout) {
return 0;
if(!even(av_channel_layout_subset(ch_layout, (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER))))
return 0;
if(!even(av_channel_layout_subset(ch_layout, (AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT))))
return 0;
if(ch_layout->nb_channels >= SWR_CH_MAX)
return 0;
@@ -369,6 +371,28 @@ av_cold int swr_build_matrix2(const AVChannelLayout *in_layout, const AVChannelL
}else
av_assert0(0);
}
if (unaccounted & AV_CH_TOP_FRONT_LEFT) {
if (av_channel_layout_index_from_channel(&out_ch_layout, AV_CHAN_TOP_FRONT_CENTER) >= 0) {
matrix[TOP_FRONT_CENTER][TOP_FRONT_LEFT ] += M_SQRT1_2;
matrix[TOP_FRONT_CENTER][TOP_FRONT_RIGHT] += M_SQRT1_2;
if (av_channel_layout_index_from_channel(&in_ch_layout, AV_CHAN_TOP_FRONT_CENTER) >= 0)
matrix[TOP_FRONT_CENTER][TOP_FRONT_CENTER] = center_mix_level * sqrt(2);
} else if (av_channel_layout_index_from_channel(&out_ch_layout, AV_CHAN_FRONT_LEFT) >= 0) {
if (av_channel_layout_index_from_channel(&in_ch_layout, AV_CHAN_FRONT_LEFT) >= 0) {
matrix[FRONT_LEFT ][TOP_FRONT_LEFT ] += M_SQRT1_2;
matrix[FRONT_RIGHT][TOP_FRONT_RIGHT] += M_SQRT1_2;
} else {
matrix[FRONT_LEFT ][TOP_FRONT_LEFT ] += 1.0;
matrix[FRONT_RIGHT][TOP_FRONT_RIGHT] += 1.0;
}
} else if (av_channel_layout_index_from_channel(&out_ch_layout, AV_CHAN_FRONT_CENTER) >= 0) {
matrix[FRONT_CENTER][TOP_FRONT_LEFT ] += M_SQRT1_2;
matrix[FRONT_CENTER][TOP_FRONT_RIGHT] += M_SQRT1_2;
} else
av_assert0(0);
}
/* mix LFE into front left/right or center */
if (unaccounted & AV_CH_LOW_FREQUENCY) {
if (av_channel_layout_index_from_channel(&out_ch_layout, AV_CHAN_FRONT_CENTER) >= 0) {