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Tools: Topology: Add Micsel module to MFCC capture pipeline #10800

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Tools: Topology: Add Micsel module to MFCC capture pipeline #10800

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e6d3486
Audio: Selector: Add blob for stereo to double mono
singalsu May 21, 2026
ab8db4f
Tools: Topology: Add Micsel module to MFCC capture pipeline
singalsu May 21, 2026
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13 changes: 12 additions & 1 deletion src/audio/selector/tune/sof_selector_blobs.m
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ function sof_selector_blobs()
IPC4_CHANNEL_CONFIG_STEREO = 1;
IPC4_CHANNEL_CONFIG_QUATRO = 5;
IPC4_CHANNEL_CONFIG_5_POINT_1 = 8;
IPC4_CHANNEL_CONFIG_DUAL_MONO = 9;
IPC4_CHANNEL_CONFIG_7_POINT_1 = 12;

% Matrix for 1:1 pass-through
Expand All @@ -39,6 +40,16 @@ function sof_selector_blobs()
sel.coeffs(1, 2) = 0.7071;
stereo_to_mono_pack8 = write_blob(sel, "downmix_stereo_to_mono");

% Stereo to dual-mono downmix
sel.ch_count = [2 2];
sel.ch_config = [IPC4_CHANNEL_CONFIG_STEREO IPC4_CHANNEL_CONFIG_DUAL_MONO];
sel.coeffs = zeros(8,8);
sel.coeffs(1, 1) = 0.5;
sel.coeffs(1, 2) = 0.5;
sel.coeffs(2, 1) = 0.5;
sel.coeffs(2, 2) = 0.5;
stereo_to_doublemono_pack8 = write_blob(sel, "downmix_stereo_to_doublemono");

% 5.1 to stereo downmix
sel.ch_count = [6 2];
sel.ch_config = [IPC4_CHANNEL_CONFIG_5_POINT_1 IPC4_CHANNEL_CONFIG_STEREO];
Expand Down Expand Up @@ -189,7 +200,7 @@ function write_8bit_packed(pack8, blobname)
blob8 = sof_selector_build_blob(pack8);
str_config = "selector_config";
str_exported = "Exported with script sof_selector_blobs.m";
str_howto = "cd tools/tune/selector; octave sof_selector_blobs.m";
str_howto = "cd src/audio/selector/tune; octave sof_selector_blobs.m";
sof_tools = '../../../../tools';
sof_tplg = fullfile(sof_tools, 'topology');
sof_tplg_selector = fullfile(sof_tplg, 'topology2/include/components/micsel');
Expand Down
2 changes: 1 addition & 1 deletion tools/topology/topology2/cavs-sdw.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@
<host-gateway-playback.conf>
<host-gateway-capture.conf>
<host-gateway-tdfb-drc-capture.conf>
<host-gateway-src-mfcc-capture.conf>
<host-gateway-src-micsel-mfcc-capture.conf>
<src.conf>
<io-gateway.conf>
<io-gateway-capture.conf>
Expand Down
26 changes: 26 additions & 0 deletions tools/topology/topology2/include/components/micsel/downmix_stereo_to_doublemono.conf
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Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
# Exported with script sof_selector_blobs.m 21-May-2026
# cd src/audio/selector/tune; octave sof_selector_blobs.m
Object.Base.data."selector_config" {
bytes "
0x53,0x4f,0x46,0x34,0x00,0x00,0x00,0x00,
0x84,0x00,0x00,0x00,0x01,0xd0,0x01,0x03,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x02,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x02,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00"
}
160 changes: 160 additions & 0 deletions tools/topology/topology2/include/pipelines/cavs/host-gateway-src-micsel-mfcc-capture.conf
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Original file line number Diff line number Diff line change
@@ -0,0 +1,160 @@
#
# SRC-Micsel-MFCC capture pipeline
#
# This class provides host pipeline for capture with MFCC audio features input.
# All attributes defined herein are namespaced by alsatplg to
# "Object.Pipeline.host-gateway-src-micsel-mfcc-capture.N.attribute_name".
#
# Usage: host-gateway-src-micsel-mfcc-capture pipeline object can be instantiated as:
#
# Object.Pipeline.host-gateway-src-micsel-mfcc-capture."N" {
# period 1000
# time_domain "timer"
# }
#
# Where N is the unique pipeline ID within the same alsaconf node.
#

<include/common/input_audio_format.conf>
<include/common/output_audio_format.conf>
<include/components/pipeline.conf>
<include/components/host-copier.conf>
<include/components/src.conf>
Comment on lines +18 to +22
<include/components/micsel.conf>
<include/components/mfcc.conf>

Class.Pipeline."host-gateway-src-micsel-mfcc-capture" {

<include/pipelines/pipeline-common.conf>

attributes {
!constructor [
"index"
]

#
# host-gateway-src-micsel-mfcc-capture objects instantiated within the
# same alsaconf node must have unique pipeline_id attribute
#
unique "instance"
}

Object.Widget {
src."1" {
num_input_pins 1
num_output_pins 1
num_input_audio_formats 3
num_output_audio_formats 1
Object.Base.input_audio_format [
{
in_bit_depth 32
in_valid_bit_depth 32
in_rate 48000
}
{
in_bit_depth 32
in_valid_bit_depth 32
in_rate 96000
}
{
in_bit_depth 32
in_valid_bit_depth 32
in_rate 192000
}
]
Object.Base.output_audio_format [
{
out_bit_depth 32
out_valid_bit_depth 32
out_rate 16000
}
]
}

micsel."1" {
num_input_audio_formats 1
num_output_audio_formats 1
Object.Base.input_audio_format [
{
in_bit_depth 32
in_valid_bit_depth 32
in_rate 16000
}
]
Object.Base.output_audio_format [
{
out_bit_depth 32
out_valid_bit_depth 32
out_rate 16000
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out_channels 2
out_ch_cfg $CHANNEL_CONFIG_DUAL_MONO
}
]
}

mfcc."1" {
num_input_audio_formats 1
num_output_audio_formats 1
Object.Base.input_audio_format [
{
in_bit_depth 32
in_valid_bit_depth 32
in_rate 16000
}
]
Object.Base.output_audio_format [
{
out_bit_depth 32
out_valid_bit_depth 32
out_rate 16000
}
]
}

host-copier."1" {
type "aif_out"
node_type $HDA_HOST_INPUT_CLASS
num_input_pins 1
num_output_pins 1
num_input_audio_formats 1
num_output_audio_formats 1
Object.Base.input_audio_format [
{
in_bit_depth 32
in_valid_bit_depth 32
in_rate 16000
}
]
Object.Base.output_audio_format [
{
out_bit_depth 32
out_valid_bit_depth 32
out_rate 16000
}
]
}

pipeline."1" {
priority 0
lp_mode 0
}
}


Object.Base {
!route [
{
source src.$index.1
sink micsel.$index.1
}
{
source micsel.$index.1
sink mfcc.$index.1
}
]
}

direction "capture"
dynamic_pipeline 1
time_domain "timer"
}
11 changes: 10 additions & 1 deletion tools/topology/topology2/platform/intel/sdw-dmic-audio-feature.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ Define {
SDW_DMIC_AUDIO_FEATURE_CAPTURE_PIPELINE_ID 131
}

Object.Pipeline.host-gateway-src-mfcc-capture [
Object.Pipeline.host-gateway-src-micsel-mfcc-capture [
{
index $SDW_DMIC_AUDIO_FEATURE_CAPTURE_PIPELINE_ID

Expand All @@ -15,6 +15,15 @@ Object.Pipeline.host-gateway-src-mfcc-capture [
pcm_id $SDW_DMIC_AUDIO_FEATURE_CAPTURE_PCM_ID
}

Object.Widget.micsel.1 {
Object.Control {
bytes."1" {
name "$SDW_DMIC_AUDIO_FEATURE_CAPTURE_PCM_NAME Micsel bytes"
<include/components/micsel/downmix_stereo_to_doublemono.conf>
}
}
}

Object.Widget.mfcc.1 {
Object.Control {
bytes."1" {
Expand Down
11 changes: 10 additions & 1 deletion tools/topology/topology2/platform/intel/sdw-jack-audio-feature.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ Define {
SDW_JACK_AUDIO_FEATURE_CAPTURE_PIPELINE_ID 130
}

Object.Pipeline.host-gateway-src-mfcc-capture [
Object.Pipeline.host-gateway-src-micsel-mfcc-capture [
{
index $SDW_JACK_AUDIO_FEATURE_CAPTURE_PIPELINE_ID

Expand All @@ -15,6 +15,15 @@ Object.Pipeline.host-gateway-src-mfcc-capture [
pcm_id $SDW_JACK_AUDIO_FEATURE_CAPTURE_PCM_ID
}

Object.Widget.micsel.1 {
Object.Control {
bytes."1" {
name "$SDW_JACK_AUDIO_FEATURE_CAPTURE_PCM_NAME Micsel bytes"
<include/components/micsel/downmix_stereo_to_doublemono.conf>
}
}
}

Object.Widget.mfcc.1 {
Object.Control {
bytes."1" {
Expand Down
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