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avcodec/libmpeghdec: Check channel layouts generically

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-09-24 18:07:10 +02:00
parent ca7679c82f
commit 188440929d
1 changed files with 29 additions and 68 deletions
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97
libavcodec/libmpeghdec.c
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@@ -68,75 +68,36 @@ static av_cold int mpegh3dadec_close(AVCodecContext *avctx)
// https://github.com/Fraunhofer-IIS/mpeghdec/wiki/MPEG-H-decoder-target-layouts
static av_cold int channel_layout_to_cicp(const AVChannelLayout *layout)
{
const AVChannelLayout layout_7point2point3 =
(AVChannelLayout) AV_CHANNEL_LAYOUT_MASK(
12, (AV_CH_LAYOUT_5POINT1POINT2 | AV_CH_SIDE_SURROUND_LEFT |
AV_CH_SIDE_SURROUND_RIGHT | AV_CH_TOP_BACK_CENTER |
AV_CH_LOW_FREQUENCY_2));
const AVChannelLayout layout_5point1point6 =
(AVChannelLayout) AV_CHANNEL_LAYOUT_MASK(
12, (AV_CH_LAYOUT_5POINT1POINT4_BACK | AV_CH_TOP_FRONT_CENTER |
AV_CH_TOP_CENTER));
const AVChannelLayout layout_7point1point6 =
(AVChannelLayout) AV_CHANNEL_LAYOUT_MASK(
14, (AV_CH_LAYOUT_7POINT1POINT4_BACK | AV_CH_TOP_FRONT_CENTER |
AV_CH_TOP_CENTER));
if (!av_channel_layout_compare(layout,
&(AVChannelLayout) AV_CHANNEL_LAYOUT_MONO)) {
return 1;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_STEREO)) {
return 2;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_SURROUND)) {
return 3;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_4POINT0)) {
return 4;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_5POINT0)) {
return 5;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_5POINT1)) {
return 6;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_7POINT1_WIDE)) {
return 7;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_2_1)) {
return 9;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_2_2)) {
return 10;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_6POINT1)) {
return 11;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_7POINT1)) {
return 12;
} else if (!av_channel_layout_compare(
layout, &(AVChannelLayout) AV_CHANNEL_LAYOUT_22POINT2)) {
return 13;
} else if (!av_channel_layout_compare(
layout,
&(AVChannelLayout) AV_CHANNEL_LAYOUT_5POINT1POINT2)) {
return 14;
} else if (!av_channel_layout_compare(layout, &layout_7point2point3)) {
return 15;
} else if (!av_channel_layout_compare(
layout,
&(AVChannelLayout) AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK)) {
return 16;
} else if (!av_channel_layout_compare(layout, &layout_5point1point6)) {
return 17;
} else if (!av_channel_layout_compare(layout, &layout_7point1point6)) {
return 18;
} else if (!av_channel_layout_compare(
layout,
&(AVChannelLayout) AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK)) {
return 19;
// different from AV_CH_LAYOUT_7POINT2POINT3
#define CH_LAYOUT_7POINT2POINT3 AV_CH_LAYOUT_5POINT1POINT2 | AV_CH_SIDE_SURROUND_LEFT | \
AV_CH_SIDE_SURROUND_RIGHT | AV_CH_TOP_BACK_CENTER | \
AV_CH_LOW_FREQUENCY_2
#define CH_LAYOUT_5POINT1POINT6 AV_CH_LAYOUT_5POINT1POINT4_BACK | \
AV_CH_TOP_FRONT_CENTER | AV_CH_TOP_CENTER
#define CH_LAYOUT_7POINT1POINT6 AV_CH_LAYOUT_7POINT1POINT4_BACK | \
AV_CH_TOP_FRONT_CENTER | AV_CH_TOP_CENTER
static const uint64_t channel_layout_masks[] = {
0,
AV_CH_LAYOUT_MONO, AV_CH_LAYOUT_STEREO,
AV_CH_LAYOUT_SURROUND, AV_CH_LAYOUT_4POINT0,
AV_CH_LAYOUT_5POINT0, AV_CH_LAYOUT_5POINT1,
AV_CH_LAYOUT_7POINT1_WIDE, 0,
AV_CH_LAYOUT_2_1, AV_CH_LAYOUT_2_2,
AV_CH_LAYOUT_6POINT1, AV_CH_LAYOUT_7POINT1,
AV_CH_LAYOUT_22POINT2, AV_CH_LAYOUT_5POINT1POINT2,
CH_LAYOUT_7POINT2POINT3, AV_CH_LAYOUT_5POINT1POINT4_BACK,
CH_LAYOUT_5POINT1POINT6, CH_LAYOUT_7POINT1POINT6,
AV_CH_LAYOUT_7POINT1POINT4_BACK,
};
for (size_t i = 0; i < FF_ARRAY_ELEMS(channel_layout_masks); ++i) {
if (channel_layout_masks[i]) {
AVChannelLayout ch_layout;
av_channel_layout_from_mask(&ch_layout, channel_layout_masks[i]);
if (!av_channel_layout_compare(layout, &ch_layout))
return i;
}
}
return 0;
}