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Tools: Topology: Add Micsel module to MFCC capture pipeline
This patch adds the Micsel (or Selector) module with a configuration blob for stereo to double mono to source of MFCC. The Micsel module has better input select capabilities than bare MFCC module. The sum of L+R provides a slightly better SNR than the single (left) channel pick with MFCC for it's mono processing. It will reduce a bit noise in the audio features and possibly improve speech recognition quality. Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
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4 files changed

Lines changed: 181 additions & 3 deletions

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‎tools/topology/topology2/cavs-sdw.conf‎

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<host-gateway-playback.conf>
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<host-gateway-capture.conf>
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<host-gateway-tdfb-drc-capture.conf>
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<host-gateway-src-mfcc-capture.conf>
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<host-gateway-src-micsel-mfcc-capture.conf>
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<src.conf>
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<io-gateway.conf>
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<io-gateway-capture.conf>

‎tools/topology/topology2/include/pipelines/cavs/host-gateway-src-micsel-mfcc-capture.conf‎

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#
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# SRC-Micsel-MFCC capture pipeline
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#
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# This class provides host pipeline for capture with MFCC audio features input.
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# All attributes defined herein are namespaced by alsatplg to
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# "Object.Pipeline.host-gateway-src-micsel-mfcc-capture.N.attribute_name".
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#
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# Usage: host-gateway-src-micsel-mfcc-capture pipeline object can be instantiated as:
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#
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# Object.Pipeline.host-gateway-src-micsel-mfcc-capture."N" {
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# period 1000
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# time_domain "timer"
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# }
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#
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# Where N is the unique pipeline ID within the same alsaconf node.
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#
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<include/common/input_audio_format.conf>
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<include/common/output_audio_format.conf>
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<include/components/pipeline.conf>
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<include/components/host-copier.conf>
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<include/components/src.conf>
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<include/components/micsel.conf>
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<include/components/mfcc.conf>
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Class.Pipeline."host-gateway-src-micsel-mfcc-capture" {
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<include/pipelines/pipeline-common.conf>
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attributes {
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!constructor [
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"index"
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]
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#
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# host-gateway-src-micsel-mfcc-capture objects instantiated within the
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# same alsaconf node must have unique pipeline_id attribute
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#
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unique "instance"
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}
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Object.Widget {
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src."1" {
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num_input_pins 1
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num_output_pins 1
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num_input_audio_formats 3
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num_output_audio_formats 1
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Object.Base.input_audio_format [
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{
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in_bit_depth 32
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in_valid_bit_depth 32
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in_rate 48000
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}
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{
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in_bit_depth 32
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in_valid_bit_depth 32
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in_rate 96000
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}
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{
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in_bit_depth 32
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in_valid_bit_depth 32
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in_rate 192000
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}
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]
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Object.Base.output_audio_format [
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{
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out_bit_depth 32
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out_valid_bit_depth 32
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out_rate 16000
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}
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]
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}
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micsel."1" {
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num_input_audio_formats 1
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num_output_audio_formats 1
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Object.Base.input_audio_format [
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{
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in_bit_depth 32
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in_valid_bit_depth 32
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in_rate 16000
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}
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]
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Object.Base.output_audio_format [
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{
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out_bit_depth 32
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out_valid_bit_depth 32
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out_rate 16000
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out_channels 2
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out_ch_cfg $CHANNEL_CONFIG_DUAL_MONO
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}
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]
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}
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mfcc."1" {
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num_input_audio_formats 1
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num_output_audio_formats 1
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Object.Base.input_audio_format [
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{
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in_bit_depth 32
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in_valid_bit_depth 32
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in_rate 16000
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}
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]
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Object.Base.output_audio_format [
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{
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out_bit_depth 32
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out_valid_bit_depth 32
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out_rate 16000
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}
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]
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}
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host-copier."1" {
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type "aif_out"
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node_type $HDA_HOST_INPUT_CLASS
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num_input_pins 1
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num_output_pins 1
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num_input_audio_formats 1
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num_output_audio_formats 1
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Object.Base.input_audio_format [
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{
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in_bit_depth 32
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in_valid_bit_depth 32
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in_rate 16000
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}
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]
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Object.Base.output_audio_format [
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{
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out_bit_depth 32
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out_valid_bit_depth 32
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out_rate 16000
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}
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]
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}
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pipeline."1" {
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priority 0
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lp_mode 0
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}
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}
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Object.Base {
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!route [
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{
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source src.$index.1
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sink micsel.$index.1
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}
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{
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source micsel.$index.1
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sink mfcc.$index.1
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}
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]
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}
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direction "capture"
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dynamic_pipeline 1
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time_domain "timer"
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}

‎tools/topology/topology2/platform/intel/sdw-dmic-audio-feature.conf‎

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SDW_DMIC_AUDIO_FEATURE_CAPTURE_PIPELINE_ID 131
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}
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Object.Pipeline.host-gateway-src-mfcc-capture [
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Object.Pipeline.host-gateway-src-micsel-mfcc-capture [
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{
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index $SDW_DMIC_AUDIO_FEATURE_CAPTURE_PIPELINE_ID
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pcm_id $SDW_DMIC_AUDIO_FEATURE_CAPTURE_PCM_ID
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}
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Object.Widget.micsel.1 {
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Object.Control {
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bytes."1" {
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name "$SDW_DMIC_AUDIO_FEATURE_CAPTURE_PCM_NAME Micsel bytes"
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<include/components/micsel/downmix_stereo_to_doublemono.conf>
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}
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}
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}
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Object.Widget.mfcc.1 {
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Object.Control {
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bytes."1" {

‎tools/topology/topology2/platform/intel/sdw-jack-audio-feature.conf‎

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SDW_JACK_AUDIO_FEATURE_CAPTURE_PIPELINE_ID 130
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}
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Object.Pipeline.host-gateway-src-mfcc-capture [
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Object.Pipeline.host-gateway-src-micsel-mfcc-capture [
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{
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index $SDW_JACK_AUDIO_FEATURE_CAPTURE_PIPELINE_ID
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pcm_id $SDW_JACK_AUDIO_FEATURE_CAPTURE_PCM_ID
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}
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Object.Widget.micsel.1 {
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Object.Control {
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bytes."1" {
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name "$SDW_JACK_AUDIO_FEATURE_CAPTURE_PCM_NAME Micsel bytes"
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<include/components/micsel/downmix_stereo_to_doublemono.conf>
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}
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}
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}
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Object.Widget.mfcc.1 {
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Object.Control {
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bytes."1" {

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