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Audio: DRC: Use audio_stream_copy() with pass-through configuration #9626

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merged 1 commit into from
Nov 1, 2024
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Audio: DRC: Use audio_stream_copy() with pass-through configuration #9626

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21 changes: 21 additions & 0 deletions src/audio/drc/drc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -278,6 +278,18 @@ static int drc_process(struct processing_module *mod,
comp_err(dev, "drc_copy(), failed DRC setup");
return ret;
}

/* If new configuration blob is received in pass-through mode, and it
* has params.enabled true, then find the DRC processing function.
*/
if (cd->drc_func == drc_default_pass && cd->config->params.enabled)
cd->drc_func = drc_find_proc_func(cd->source_format);

/* If new configuration blob has params.enabled false, then it is safe
* to switch to pass-through mode.
*/
if (!cd->config->params.enabled)
cd->drc_func = drc_default_pass;
}

/* Control pass-though in processing function with switch control */
Expand Down Expand Up @@ -351,6 +363,15 @@ static int drc_prepare(struct processing_module *mod,
comp_err(dev, "drc_prepare(), No proc func");
return -EINVAL;
}

/* Params.enabled in the configuration blob is the master switch of DRC.
* The enable switch control does not have impact if this is not set to
* true. When false it is safe to use fast pass-through copy. A
* non-enabled blob can be used when same pipeline is used for both
* headphone and speaker where DRC should be off for headphone mode.
*/
if (!cd->config->params.enabled)
cd->drc_func = drc_default_pass;
} else {
/* Generic function for all formats */
cd->drc_func = drc_default_pass;
Expand Down
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