# Low Latency Passthrough with volume Pipeline and PCM # # Pipeline Endpoints for connection are :- # # host PCM_P --> SRC --> sink DAI0 # Include topology builder include(`local.m4') # # Components and Buffers # # Host "Passthrough Capture" PCM uses pipeline DMAC and channel # with 4 sink and 0 source periods W_PCM_CAPTURE(Passthrough Capture, PIPELINE_DMAC, PIPELINE_DMAC_CHAN, 4, 0, 2) # # SRC Configuration # SectionVendorTuples."media_src_tokens" { tokens "sof_src_tokens" tuples."word" { SOF_TKN_SRC_RATE_OUT "48000" } } SectionData."media_src_conf" { tuples "media_src_tokens" } # "SRC" has 4 source and 4 sink periods W_SRC(0, PIPELINE_FORMAT, 4, 4, media_src_conf, 2) # Capture Buffers W_BUFFER(0, COMP_BUFFER_SIZE(4, COMP_SAMPLE_SIZE(PIPELINE_FORMAT), PIPELINE_CHANNELS, SCHEDULE_FRAMES), PLATFORM_HOST_MEM_CAP) W_BUFFER(1, COMP_BUFFER_SIZE(4, COMP_SAMPLE_SIZE(PIPELINE_FORMAT), PIPELINE_CHANNELS, SCHEDULE_FRAMES), PLATFORM_DAI_MEM_CAP) # # DAI definitions # W_DAI_IN(DAI_TYPE, DAI_INDEX, DAI_FORMAT, 0, DAI_PERIODS, DAI_PERIODS, dai0c_plat_conf) # # DAI pipeline # W_PIPELINE(N_DAI_IN, SCHEDULE_DEADLINE, SCHEDULE_PRIORITY, SCHEDULE_FRAMES, SCHEDULE_CORE, 0, pipe_dai_schedule_plat) # # Pipeline Graph # # host PCM_P <-- B0 <-- SRC 0 <-- B1 <-- sink DAI0 SectionGraph."pipe-pass-src-capture-PIPELINE_ID" { index STR(PIPELINE_ID) lines [ dapm(Passthrough Capture PCM_ID, N_PCMC) dapm(N_PCMC, N_BUFFER(0)) dapm(N_BUFFER(0), N_SRC(0)) dapm(N_SRC(0), N_BUFFER(1)) ] } # # Pipeline Source and Sinks # indir(`define', concat(`PIPELINE_SINK_', PIPELINE_ID), N_BUFFER(1)) indir(`define', concat(`PIPELINE_PCM_', PIPELINE_ID), Passthrough Capture PCM_ID) # # PCM Configuration # SectionPCMCapabilities.STR(Passthrough Capture PCM_ID) { formats "S32_LE,S24_LE,S16_LE" rate_min "8000" rate_max "96000" channels_min "2" channels_max "4" periods_min "2" periods_max "16" period_size_min "192" period_size_max "16384" buffer_size_min "65536" buffer_size_max "65536" }