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avformat/iamf: document the expandable channel layouts

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Signed-off-by: James Almer <jamrial@gmail.com>
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James Almer
2024-12-30 16:53:57 -03:00
parent 8f6a1a06a6
commit c089c158d6
1 changed files with 13 additions and 0 deletions
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13
libavformat/iamf.c
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@ -46,55 +46,68 @@ const AVChannelLayout ff_iamf_scalable_ch_layouts[10] = {
};
const AVChannelLayout ff_iamf_expanded_scalable_ch_layouts[13] = {
// The low-frequency effects subset (LFE) of "Loudspeaker configuration for Sound System J"
{
.nb_channels = 1,
.order = AV_CHANNEL_ORDER_NATIVE,
.u.mask = AV_CH_LOW_FREQUENCY,
},
// The surround subset (Ls/Rs) of "Loudspeaker configuration for Sound System I"
{
.nb_channels = 2,
.order = AV_CHANNEL_ORDER_NATIVE,
.u.mask = AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT,
},
// The side surround subset (Lss/Rss) of "Loudspeaker configuration for Sound System J"
{
.nb_channels = 2,
.order = AV_CHANNEL_ORDER_NATIVE,
.u.mask = AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT,
},
// The rear surround subset (Lrs/Rrs) of "Loudspeaker configuration for Sound System J"
{
.nb_channels = 2,
.order = AV_CHANNEL_ORDER_NATIVE,
.u.mask = AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT,
},
// The top front subset (Ltf/Rtf) of "Loudspeaker configuration for Sound System J"
{
.nb_channels = 2,
.order = AV_CHANNEL_ORDER_NATIVE,
.u.mask = AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT,
},
// The top back subset (Ltb/Rtb) of "Loudspeaker configuration for Sound System J"
{
.nb_channels = 2,
.order = AV_CHANNEL_ORDER_NATIVE,
.u.mask = AV_CH_TOP_BACK_LEFT | AV_CH_TOP_BACK_RIGHT,
},
// The top 4 channels (Ltf/Rtf/Ltb/Rtb) of "Loudspeaker configuration for Sound System J"
{
.nb_channels = 4,
.order = AV_CHANNEL_ORDER_NATIVE,
.u.mask = AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT |
AV_CH_TOP_BACK_LEFT | AV_CH_TOP_BACK_RIGHT,
},
// The front 3 channels (L/C/R) of "Loudspeaker configuration for Sound System J"
AV_CHANNEL_LAYOUT_SURROUND,
// Subset of "Loudspeaker configuration for Sound System H"
AV_CHANNEL_LAYOUT_9POINT1POINT6,
// Front subset of "Loudspeaker configuration for Sound System H"
AV_CHANNEL_LAYOUT_STEREO,
// The side subset (SiL/SiR) of "Loudspeaker configuration for Sound System H"
{
.nb_channels = 2,
.order = AV_CHANNEL_ORDER_NATIVE,
.u.mask = AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT,
},
// The top side subset (TpSiL/TpSiR) of "Loudspeaker configuration for Sound System H"
{
.nb_channels = 2,
.order = AV_CHANNEL_ORDER_NATIVE,
.u.mask = AV_CH_TOP_SIDE_LEFT | AV_CH_TOP_SIDE_RIGHT,
},
// The top 6 channels (TpFL/TpFR/TpSiL/TpSiR/TpBL/TpBR) of "Loudspeaker configuration for Sound System H"
{
.nb_channels = 6,
.order = AV_CHANNEL_ORDER_NATIVE,