[FFmpeg-cvslog] avformat/iamf: fix setting channel layout for Scalable layers
James Almer
git at videolan.org
Tue Jun 24 20:45:00 EEST 2025
ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Mon Jun 16 21:33:26 2025 -0300| [cd2461e627cc13cc43d68a87e6ebf90c4a7d2850] | committer: James Almer
avformat/iamf: fix setting channel layout for Scalable layers
The way streams are coded in an IAMF struct follows a scalable model where the
channel layouts for each layer may not match the channel order our API can
represent in a Native order layout.
For example, an audio element may have six coded streams in the form of two
stereo streams, followed by two mono streams, and then by another two stereo
streams, for a total of 10 channels, and define for them four scalable layers
with loudspeaker_layout values "Stereo", "5.1ch", "5.1.2ch", and "5.1.4ch".
The first layer references the first stream, and each following layer will
reference all previous streams plus extra ones.
In this case, the "5.1ch" layer will reference four streams (the first two
stereo and the two mono) to encompass six channels, which does not match out
native layout 5.1(side) given that FC and LFE come after FL+FR but before
SL+SR, and here, they are at the end.
For this reason, we need to build Custom order layouts that properly represent
what we're exporting.
----
Before:
Stream group #0:0[0x12c]: IAMF Audio Element:
Layer 0: stereo
Stream #0:0[0x0]: Audio: opus, 48000 Hz, stereo, fltp (default)
Layer 1: 5.1(side)
Stream #0:0[0x0]: Audio: opus, 48000 Hz, stereo, fltp (default)
Stream #0:1[0x1]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Stream #0:2[0x2]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Stream #0:3[0x3]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Layer 2: 5.1.2
Stream #0:0[0x0]: Audio: opus, 48000 Hz, stereo, fltp (default)
Stream #0:1[0x1]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Stream #0:2[0x2]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Stream #0:3[0x3]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Stream #0:4[0x4]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Layer 3: 5.1.4
Stream #0:0[0x0]: Audio: opus, 48000 Hz, stereo, fltp (default)
Stream #0:1[0x1]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Stream #0:2[0x2]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Stream #0:3[0x3]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Stream #0:4[0x4]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Stream #0:5[0x5]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
----
AFter:
Stream group #0:0[0x12c]: IAMF Audio Element:
Layer 0: stereo
Stream #0:0[0x0]: Audio: opus, 48000 Hz, stereo, fltp (default)
Layer 1: 6 channels (FL+FR+SL+SR+FC+LFE)
Stream #0:0[0x0]: Audio: opus, 48000 Hz, stereo, fltp (default)
Stream #0:1[0x1]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Stream #0:2[0x2]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Stream #0:3[0x3]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Layer 2: 8 channels (FL+FR+SL+SR+FC+LFE+TFL+TFR)
Stream #0:0[0x0]: Audio: opus, 48000 Hz, stereo, fltp (default)
Stream #0:1[0x1]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Stream #0:2[0x2]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Stream #0:3[0x3]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Stream #0:4[0x4]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Layer 3: 10 channels (FL+FR+SL+SR+FC+LFE+TFL+TFR+TBL+TBR)
Stream #0:0[0x0]: Audio: opus, 48000 Hz, stereo, fltp (default)
Stream #0:1[0x1]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Stream #0:2[0x2]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Stream #0:3[0x3]: Audio: opus, 48000 Hz, mono, fltp (dependent)
Stream #0:4[0x4]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Stream #0:5[0x5]: Audio: opus, 48000 Hz, stereo, fltp (dependent)
Signed-off-by: James Almer <jamrial at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cd2461e627cc13cc43d68a87e6ebf90c4a7d2850
---
libavformat/iamf_parse.c | 77 ++++++++++++++++++++++++---
libavformat/iamf_writer.c | 28 ++++++++--
libavformat/iamfdec.c | 19 -------
tests/ref/fate/iamf-5_1-copy | 2 +-
tests/ref/fate/iamf-5_1-demux | 2 +-
tests/ref/fate/iamf-5_1_4 | 6 +--
tests/ref/fate/iamf-7_1_4 | 54 +++++++++----------
tests/ref/fate/iamf-9_1_6 | 2 +-
tests/ref/fate/mov-mp4-iamf-5_1_4 | 6 +--
tests/ref/fate/mov-mp4-iamf-7_1_4-video-first | 6 +--
tests/ref/fate/mov-mp4-iamf-7_1_4-video-last | 6 +--
11 files changed, 135 insertions(+), 73 deletions(-)
diff --git a/libavformat/iamf_parse.c b/libavformat/iamf_parse.c
index 756671f7bf..73e98200e3 100644
--- a/libavformat/iamf_parse.c
+++ b/libavformat/iamf_parse.c
@@ -364,7 +364,8 @@ static int scalable_channel_layout_config(void *s, AVIOContext *pb,
return AVERROR(ENOMEM);
audio_element->nb_layers = nb_layers;
- for (int i = 0; i < nb_layers; i++) {
+ for (int i = 0, n = 0; i < nb_layers; i++) {
+ AVChannelLayout ch_layout = { 0 };
AVIAMFLayer *layer;
int loudspeaker_layout, output_gain_is_present_flag;
int substream_count, coupled_substream_count;
@@ -394,12 +395,16 @@ static int scalable_channel_layout_config(void *s, AVIOContext *pb,
if (!i && loudspeaker_layout == 15)
expanded_loudspeaker_layout = avio_r8(pb);
- if (expanded_loudspeaker_layout > 0 && expanded_loudspeaker_layout < 13)
- av_channel_layout_copy(&layer->ch_layout, &ff_iamf_expanded_scalable_ch_layouts[expanded_loudspeaker_layout]);
- else if (loudspeaker_layout < 10)
- av_channel_layout_copy(&layer->ch_layout, &ff_iamf_scalable_ch_layouts[loudspeaker_layout]);
- else
- layer->ch_layout = (AVChannelLayout){ .order = AV_CHANNEL_ORDER_UNSPEC,
+ if (expanded_loudspeaker_layout > 0 && expanded_loudspeaker_layout < 13) {
+ av_channel_layout_copy(&ch_layout, &ff_iamf_expanded_scalable_ch_layouts[expanded_loudspeaker_layout]);
+ if (i)
+ ch_layout.u.mask &= ~av_channel_layout_subset(&audio_element->element->layers[i-1]->ch_layout, UINT64_MAX);
+ } else if (loudspeaker_layout < 10) {
+ av_channel_layout_copy(&ch_layout, &ff_iamf_scalable_ch_layouts[loudspeaker_layout]);
+ if (i)
+ ch_layout.u.mask &= ~av_channel_layout_subset(&audio_element->element->layers[i-1]->ch_layout, UINT64_MAX);
+ } else
+ ch_layout = (AVChannelLayout){ .order = AV_CHANNEL_ORDER_UNSPEC,
.nb_channels = substream_count +
coupled_substream_count };
@@ -414,6 +419,64 @@ static int scalable_channel_layout_config(void *s, AVIOContext *pb,
return ret;
}
+ if (ch_layout.order == AV_CHANNEL_ORDER_NATIVE) {
+ ret = av_channel_layout_custom_init(&layer->ch_layout, ch_layout.nb_channels);
+ if (ret < 0)
+ return ret;
+
+ for (int j = 0; j < n; j++)
+ layer->ch_layout.u.map[j].id = av_channel_layout_channel_from_index(&audio_element->element->layers[i-1]->ch_layout, j);
+
+ coupled_substream_count = audio_element->layers[i].coupled_substream_count;
+ while (coupled_substream_count--) {
+ if (ch_layout.u.mask & AV_CH_LAYOUT_STEREO) {
+ layer->ch_layout.u.map[n++].id = AV_CHAN_FRONT_LEFT;
+ layer->ch_layout.u.map[n++].id = AV_CHAN_FRONT_RIGHT;
+ ch_layout.u.mask &= ~AV_CH_LAYOUT_STEREO;
+ } else if (ch_layout.u.mask & (AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)) {
+ layer->ch_layout.u.map[n++].id = AV_CHAN_FRONT_LEFT_OF_CENTER;
+ layer->ch_layout.u.map[n++].id = AV_CHAN_FRONT_RIGHT_OF_CENTER;
+ ch_layout.u.mask &= ~(AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER);
+ } else if (ch_layout.u.mask & (AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)) {
+ layer->ch_layout.u.map[n++].id = AV_CHAN_SIDE_LEFT;
+ layer->ch_layout.u.map[n++].id = AV_CHAN_SIDE_RIGHT;
+ ch_layout.u.mask &= ~(AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT);
+ } else if (ch_layout.u.mask & (AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)) {
+ layer->ch_layout.u.map[n++].id = AV_CHAN_BACK_LEFT;
+ layer->ch_layout.u.map[n++].id = AV_CHAN_BACK_RIGHT;
+ ch_layout.u.mask &= ~(AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT);
+ } else if (ch_layout.u.mask & (AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)) {
+ layer->ch_layout.u.map[n++].id = AV_CHAN_TOP_FRONT_LEFT;
+ layer->ch_layout.u.map[n++].id = AV_CHAN_TOP_FRONT_RIGHT;
+ ch_layout.u.mask &= ~(AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT);
+ } else if (ch_layout.u.mask & (AV_CH_TOP_SIDE_LEFT|AV_CH_TOP_SIDE_RIGHT)) {
+ layer->ch_layout.u.map[n++].id = AV_CHAN_TOP_SIDE_LEFT;
+ layer->ch_layout.u.map[n++].id = AV_CHAN_TOP_SIDE_RIGHT;
+ ch_layout.u.mask &= ~(AV_CH_TOP_SIDE_LEFT|AV_CH_TOP_SIDE_RIGHT);
+ } else if (ch_layout.u.mask & (AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)) {
+ layer->ch_layout.u.map[n++].id = AV_CHAN_TOP_BACK_LEFT;
+ layer->ch_layout.u.map[n++].id = AV_CHAN_TOP_BACK_RIGHT;
+ ch_layout.u.mask &= ~(AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT);
+ }
+ }
+
+ substream_count -= audio_element->layers[i].coupled_substream_count;
+ while (substream_count--) {
+ if (ch_layout.u.mask & AV_CH_FRONT_CENTER) {
+ layer->ch_layout.u.map[n++].id = AV_CHAN_FRONT_CENTER;
+ ch_layout.u.mask &= ~AV_CH_FRONT_CENTER;
+ }
+ if (ch_layout.u.mask & AV_CH_LOW_FREQUENCY) {
+ layer->ch_layout.u.map[n++].id = AV_CHAN_LOW_FREQUENCY;
+ ch_layout.u.mask &= ~AV_CH_LOW_FREQUENCY;
+ }
+ }
+
+ ret = av_channel_layout_retype(&layer->ch_layout, AV_CHANNEL_ORDER_NATIVE, 0);
+ if (ret < 0 && ret != AVERROR(ENOSYS))
+ return ret;
+ } else // AV_CHANNEL_ORDER_UNSPEC
+ av_channel_layout_copy(&layer->ch_layout, &ch_layout);
}
return 0;
diff --git a/libavformat/iamf_writer.c b/libavformat/iamf_writer.c
index e34afb9a2c..86d09c3308 100644
--- a/libavformat/iamf_writer.c
+++ b/libavformat/iamf_writer.c
@@ -250,14 +250,18 @@ int ff_iamf_add_audio_element(IAMFContext *iamf, const AVStreamGroup *stg, void
for (int j, i = 0; i < iamf_audio_element->nb_layers; i++) {
const AVIAMFLayer *layer = iamf_audio_element->layers[i];
+
for (j = 0; j < FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts); j++)
- if (!av_channel_layout_compare(&layer->ch_layout, &ff_iamf_scalable_ch_layouts[j]))
+ if (av_channel_layout_subset(&layer->ch_layout, UINT64_MAX) ==
+ av_channel_layout_subset(&ff_iamf_scalable_ch_layouts[j], UINT64_MAX))
break;
if (j >= FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts)) {
for (j = 0; j < FF_ARRAY_ELEMS(ff_iamf_expanded_scalable_ch_layouts); j++)
- if (!av_channel_layout_compare(&layer->ch_layout, &ff_iamf_expanded_scalable_ch_layouts[j]))
+ if (av_channel_layout_subset(&layer->ch_layout, UINT64_MAX) ==
+ av_channel_layout_subset(&ff_iamf_expanded_scalable_ch_layouts[j], UINT64_MAX))
break;
+
if (j >= FF_ARRAY_ELEMS(ff_iamf_expanded_scalable_ch_layouts)) {
av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
av_channel_layout_describe_bprint(&layer->ch_layout, &bp);
@@ -592,12 +596,26 @@ static int scalable_channel_layout_config(const IAMFAudioElement *audio_element,
if (!av_channel_layout_compare(&layer->ch_layout, &ff_iamf_scalable_ch_layouts[layout]))
break;
}
- if (layout >= FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts))
- for (expanded_layout = 0; expanded_layout < FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts); expanded_layout++) {
+ if (layout >= FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts)) {
+ for (layout = 0; layout < FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts); layout++)
+ if (av_channel_layout_subset(&layer->ch_layout, UINT64_MAX) ==
+ av_channel_layout_subset(&ff_iamf_scalable_ch_layouts[layout], UINT64_MAX))
+ break;
+ }
+ if (layout >= FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts)) {
+ for (expanded_layout = 0; expanded_layout < FF_ARRAY_ELEMS(ff_iamf_expanded_scalable_ch_layouts); expanded_layout++) {
if (!av_channel_layout_compare(&layer->ch_layout, &ff_iamf_expanded_scalable_ch_layouts[expanded_layout]))
break;
}
- av_assert0(expanded_layout > 0 || layout < FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts));
+ if (expanded_layout >= FF_ARRAY_ELEMS(ff_iamf_expanded_scalable_ch_layouts)) {
+ for (expanded_layout = 0; expanded_layout < FF_ARRAY_ELEMS(ff_iamf_expanded_scalable_ch_layouts); expanded_layout++)
+ if (av_channel_layout_subset(&layer->ch_layout, UINT64_MAX) ==
+ av_channel_layout_subset(&ff_iamf_expanded_scalable_ch_layouts[expanded_layout], UINT64_MAX))
+ break;
+ }
+ }
+ av_assert0((expanded_layout > 0 && expanded_layout < FF_ARRAY_ELEMS(ff_iamf_expanded_scalable_ch_layouts)) ||
+ layout < FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts));
init_put_bits(&pb, header, sizeof(header));
put_bits(&pb, 4, expanded_layout >= 0 ? 15 : layout);
put_bits(&pb, 1, !!layer->output_gain_flags);
diff --git a/libavformat/iamfdec.c b/libavformat/iamfdec.c
index 3a6276dcde..e7b5bef907 100644
--- a/libavformat/iamfdec.c
+++ b/libavformat/iamfdec.c
@@ -81,10 +81,8 @@ static int iamf_read_header(AVFormatContext *s)
for (int i = 0; i < iamf->nb_audio_elements; i++) {
IAMFAudioElement *audio_element = iamf->audio_elements[i];
- const AVIAMFLayer *layer = audio_element->element->layers[audio_element->nb_layers - 1];
AVStreamGroup *stg = avformat_stream_group_create(s, AV_STREAM_GROUP_PARAMS_IAMF_AUDIO_ELEMENT, NULL);
int coupled_substream_count = audio_element->layers[audio_element->nb_layers - 1].coupled_substream_count;
- int side_substream_id = -1, back_substream_id = -1;
if (!stg)
return AVERROR(ENOMEM);
@@ -114,28 +112,11 @@ static int iamf_read_header(AVFormatContext *s)
st->disposition |= AV_DISPOSITION_DEFAULT;
else if (audio_element->nb_layers > 1 || audio_element->layers[0].substream_count > 1)
st->disposition |= AV_DISPOSITION_DEPENDENT;
- if (k == av_channel_layout_index_from_channel(&layer->ch_layout, AV_CHAN_BACK_LEFT))
- back_substream_id = j;
- else if (k == av_channel_layout_index_from_channel(&layer->ch_layout, AV_CHAN_SIDE_LEFT))
- side_substream_id = j;
st->id = substream->audio_substream_id;
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
k += 1 + (coupled_substream_count-- > 0);
}
-
- // Swap back and side stream ids as our native channel layout ordering doen't match the
- // order from ITU-R - BS.2051-3 for Systems I and J (where side channels come before back ones).
- if (back_substream_id >= 0 && side_substream_id >= 0 && av_channel_layout_compare(&layer->ch_layout,
- &(AVChannelLayout)AV_CHANNEL_LAYOUT_9POINT1POINT6)) {
- const IAMFSubStream *back_substream = &audio_element->substreams[back_substream_id];
- const IAMFSubStream *side_substream = &audio_element->substreams[side_substream_id];
- AVStream *back_st = stg->streams[back_substream_id];
- AVStream *side_st = stg->streams[side_substream_id];
-
- back_st->id = side_substream->audio_substream_id;
- side_st->id = back_substream->audio_substream_id;
- }
}
for (int i = 0; i < iamf->nb_mix_presentations; i++) {
diff --git a/tests/ref/fate/iamf-5_1-copy b/tests/ref/fate/iamf-5_1-copy
index 5f7d9f98c0..fe912d4ee7 100644
--- a/tests/ref/fate/iamf-5_1-copy
+++ b/tests/ref/fate/iamf-5_1-copy
@@ -37,7 +37,7 @@ output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=5.1(side)
+channel_layout=6 channels (FL+FR+SL+SR+FC+LFE)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
diff --git a/tests/ref/fate/iamf-5_1-demux b/tests/ref/fate/iamf-5_1-demux
index 5f7d9f98c0..fe912d4ee7 100644
--- a/tests/ref/fate/iamf-5_1-demux
+++ b/tests/ref/fate/iamf-5_1-demux
@@ -37,7 +37,7 @@ output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=5.1(side)
+channel_layout=6 channels (FL+FR+SL+SR+FC+LFE)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
diff --git a/tests/ref/fate/iamf-5_1_4 b/tests/ref/fate/iamf-5_1_4
index 1d4c055906..4c765dc8e1 100644
--- a/tests/ref/fate/iamf-5_1_4
+++ b/tests/ref/fate/iamf-5_1_4
@@ -111,17 +111,17 @@ output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=5.1(side)
+channel_layout=6 channels (FL+FR+SL+SR+FC+LFE)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=5.1.2
+channel_layout=8 channels (FL+FR+SL+SR+FC+LFE+TFL+TFR)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=5.1.4
+channel_layout=10 channels (FL+FR+SL+SR+FC+LFE+TFL+TFR+TBL+TBR)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
diff --git a/tests/ref/fate/iamf-7_1_4 b/tests/ref/fate/iamf-7_1_4
index 72b10f771a..4259e40135 100644
--- a/tests/ref/fate/iamf-7_1_4
+++ b/tests/ref/fate/iamf-7_1_4
@@ -45,72 +45,72 @@
0, 0, 0, 4608, 1399, 0x6e89566e
1, 0, 0, 4608, 1399, 0x6e89566e
2, 0, 0, 4608, 1396, 0x0dcb5677
-3, 0, 0, 4608, 1399, 0x6e89566e
+3, 0, 0, 4608, 1396, 0x0dcb5677
4, 0, 0, 4608, 1399, 0x6e89566e
-5, 0, 0, 4608, 1396, 0x0dcb5677
+5, 0, 0, 4608, 1399, 0x6e89566e
6, 0, 0, 4608, 1399, 0x6e89566e
0, 4608, 4608, 4608, 1442, 0x6c3c5b13
1, 4608, 4608, 4608, 1442, 0x6c3c5b13
2, 4608, 4608, 4608, 1439, 0xc46b5ac5
-3, 4608, 4608, 4608, 1442, 0x6c3c5b13
+3, 4608, 4608, 4608, 1439, 0xc46b5ac5
4, 4608, 4608, 4608, 1442, 0x6c3c5b13
-5, 4608, 4608, 4608, 1439, 0xc46b5ac5
+5, 4608, 4608, 4608, 1442, 0x6c3c5b13
6, 4608, 4608, 4608, 1442, 0x6c3c5b13
0, 9216, 9216, 4608, 1380, 0xc497571b
1, 9216, 9216, 4608, 1380, 0xc497571b
2, 9216, 9216, 4608, 1377, 0x5b2a55fe
-3, 9216, 9216, 4608, 1380, 0xc497571b
+3, 9216, 9216, 4608, 1377, 0x5b2a55fe
4, 9216, 9216, 4608, 1380, 0xc497571b
-5, 9216, 9216, 4608, 1377, 0x5b2a55fe
+5, 9216, 9216, 4608, 1380, 0xc497571b
6, 9216, 9216, 4608, 1380, 0xc497571b
0, 13824, 13824, 4608, 1383, 0x48e9510f
1, 13824, 13824, 4608, 1383, 0x48e9510f
2, 13824, 13824, 4608, 1380, 0x045550d3
-3, 13824, 13824, 4608, 1383, 0x48e9510f
+3, 13824, 13824, 4608, 1380, 0x045550d3
4, 13824, 13824, 4608, 1383, 0x48e9510f
-5, 13824, 13824, 4608, 1380, 0x045550d3
+5, 13824, 13824, 4608, 1383, 0x48e9510f
6, 13824, 13824, 4608, 1383, 0x48e9510f
0, 18432, 18432, 4608, 1572, 0x9a514719
1, 18432, 18432, 4608, 1572, 0x9a514719
2, 18432, 18432, 4608, 1568, 0xa2bc45f4
-3, 18432, 18432, 4608, 1572, 0x9a514719
+3, 18432, 18432, 4608, 1568, 0xa2bc45f4
4, 18432, 18432, 4608, 1572, 0x9a514719
-5, 18432, 18432, 4608, 1568, 0xa2bc45f4
+5, 18432, 18432, 4608, 1572, 0x9a514719
6, 18432, 18432, 4608, 1572, 0x9a514719
0, 23040, 23040, 4608, 1391, 0x74ac5014
1, 23040, 23040, 4608, 1391, 0x74ac5014
2, 23040, 23040, 4608, 1388, 0x96c85007
-3, 23040, 23040, 4608, 1391, 0x74ac5014
+3, 23040, 23040, 4608, 1388, 0x96c85007
4, 23040, 23040, 4608, 1391, 0x74ac5014
-5, 23040, 23040, 4608, 1388, 0x96c85007
+5, 23040, 23040, 4608, 1391, 0x74ac5014
6, 23040, 23040, 4608, 1391, 0x74ac5014
0, 27648, 27648, 4608, 1422, 0x2f9d47c5
1, 27648, 27648, 4608, 1422, 0x2f9d47c5
2, 27648, 27648, 4608, 1419, 0x4d4d466a
-3, 27648, 27648, 4608, 1422, 0x2f9d47c5
+3, 27648, 27648, 4608, 1419, 0x4d4d466a
4, 27648, 27648, 4608, 1422, 0x2f9d47c5
-5, 27648, 27648, 4608, 1419, 0x4d4d466a
+5, 27648, 27648, 4608, 1422, 0x2f9d47c5
6, 27648, 27648, 4608, 1422, 0x2f9d47c5
0, 32256, 32256, 4608, 1768, 0x2a044b99
1, 32256, 32256, 4608, 1768, 0x2a044b99
2, 32256, 32256, 4608, 1765, 0xacb84b24
-3, 32256, 32256, 4608, 1768, 0x2a044b99
+3, 32256, 32256, 4608, 1765, 0xacb84b24
4, 32256, 32256, 4608, 1768, 0x2a044b99
-5, 32256, 32256, 4608, 1765, 0xacb84b24
+5, 32256, 32256, 4608, 1768, 0x2a044b99
6, 32256, 32256, 4608, 1768, 0x2a044b99
0, 36864, 36864, 4608, 1534, 0xb0b35a3f
1, 36864, 36864, 4608, 1534, 0xb0b35a3f
2, 36864, 36864, 4608, 1531, 0x996458aa
-3, 36864, 36864, 4608, 1534, 0xb0b35a3f
+3, 36864, 36864, 4608, 1531, 0x996458aa
4, 36864, 36864, 4608, 1534, 0xb0b35a3f
-5, 36864, 36864, 4608, 1531, 0x996458aa
+5, 36864, 36864, 4608, 1534, 0xb0b35a3f
6, 36864, 36864, 4608, 1534, 0xb0b35a3f
0, 41472, 41472, 4608, 926, 0xc26a5eae
1, 41472, 41472, 4608, 926, 0xc26a5eae
2, 41472, 41472, 4608, 923, 0xa7225edf
-3, 41472, 41472, 4608, 926, 0xc26a5eae
+3, 41472, 41472, 4608, 923, 0xa7225edf
4, 41472, 41472, 4608, 926, 0xc26a5eae
-5, 41472, 41472, 4608, 923, 0xa7225edf
+5, 41472, 41472, 4608, 926, 0xc26a5eae
6, 41472, 41472, 4608, 926, 0xc26a5eae
[STREAM_GROUP]
index=0
@@ -127,17 +127,17 @@ output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=3.1.2
+channel_layout=6 channels (FL+FR+TFL+TFR+FC+LFE)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=7.1.2
+channel_layout=10 channels (FL+FR+TFL+TFR+FC+LFE+SL+SR+BL+BR)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=7.1.4
+channel_layout=12 channels (FL+FR+TFL+TFR+FC+LFE+SL+SR+BL+BR+TBL+TBR)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
@@ -226,7 +226,7 @@ DISPOSITION:multilayer=0
[/STREAM]
[STREAM]
index=3
-id=0x5
+id=0x3
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
@@ -272,7 +272,7 @@ DISPOSITION:multilayer=0
[/STREAM]
[STREAM]
index=5
-id=0x3
+id=0x5
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
@@ -462,7 +462,7 @@ DISPOSITION:multilayer=0
[/STREAM]
[STREAM]
index=3
-id=0x5
+id=0x3
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
@@ -508,7 +508,7 @@ DISPOSITION:multilayer=0
[/STREAM]
[STREAM]
index=5
-id=0x3
+id=0x5
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
diff --git a/tests/ref/fate/iamf-9_1_6 b/tests/ref/fate/iamf-9_1_6
index 0c55a22774..4082d35729 100644
--- a/tests/ref/fate/iamf-9_1_6
+++ b/tests/ref/fate/iamf-9_1_6
@@ -170,7 +170,7 @@ nb_layers=1
audio_element_type=0
default_w=0
[SUBCOMPONENT]
-channel_layout=9.1.6
+channel_layout=16 channels (FL+FR+FLC+FRC+SL+SR+BL+BR+TFL+TFR+TSL+TSR+TBL+TBR+FC+LFE)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
diff --git a/tests/ref/fate/mov-mp4-iamf-5_1_4 b/tests/ref/fate/mov-mp4-iamf-5_1_4
index 225bbba267..18a1f5337f 100644
--- a/tests/ref/fate/mov-mp4-iamf-5_1_4
+++ b/tests/ref/fate/mov-mp4-iamf-5_1_4
@@ -111,17 +111,17 @@ output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=5.1(side)
+channel_layout=6 channels (FL+FR+SL+SR+FC+LFE)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=5.1.2
+channel_layout=8 channels (FL+FR+SL+SR+FC+LFE+TFL+TFR)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=5.1.4
+channel_layout=10 channels (FL+FR+SL+SR+FC+LFE+TFL+TFR+TBL+TBR)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
diff --git a/tests/ref/fate/mov-mp4-iamf-7_1_4-video-first b/tests/ref/fate/mov-mp4-iamf-7_1_4-video-first
index d3b37896b2..d5a1fe1cad 100644
--- a/tests/ref/fate/mov-mp4-iamf-7_1_4-video-first
+++ b/tests/ref/fate/mov-mp4-iamf-7_1_4-video-first
@@ -158,17 +158,17 @@ output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=3.1.2
+channel_layout=6 channels (FL+FR+TFL+TFR+FC+LFE)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=7.1.2
+channel_layout=10 channels (FL+FR+TFL+TFR+FC+LFE+SL+SR+BL+BR)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=7.1.4
+channel_layout=12 channels (FL+FR+TFL+TFR+FC+LFE+SL+SR+BL+BR+TBL+TBR)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
diff --git a/tests/ref/fate/mov-mp4-iamf-7_1_4-video-last b/tests/ref/fate/mov-mp4-iamf-7_1_4-video-last
index ede4a40025..caf89d41f6 100644
--- a/tests/ref/fate/mov-mp4-iamf-7_1_4-video-last
+++ b/tests/ref/fate/mov-mp4-iamf-7_1_4-video-last
@@ -158,17 +158,17 @@ output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=3.1.2
+channel_layout=6 channels (FL+FR+TFL+TFR+FC+LFE)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=7.1.2
+channel_layout=10 channels (FL+FR+TFL+TFR+FC+LFE+SL+SR+BL+BR)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
[SUBCOMPONENT]
-channel_layout=7.1.4
+channel_layout=12 channels (FL+FR+TFL+TFR+FC+LFE+SL+SR+BL+BR+TBL+TBR)
output_gain_flags=0
output_gain=0/1
[/SUBCOMPONENT]
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