google_rtc_audio_processing: Call SetStreamFormats at prepare() time

IPC3 would always send a default config blob at component creation,
ensuring we reach the SetStreamFormats() call before any data arrives.
IPC4 doesn't do that, so we should affirmatively configure AEC in the
prepare() method.

Really this is the right way to do things anyway; all the needed info
is available dynamically from the stream config anyway, there's no
need for host involvement.

Signed-off-by: Andy Ross <[email protected]>

src/audio/google/google_rtc_audio_processing.c

@@ -602,6 +602,9 @@ static int google_rtc_audio_processing_prepare(struct processing_module *mod,
 		ret = -EINVAL;
 	}
 
+	cd->num_aec_reference_channels = MIN(ref_chan, REF_CHAN_MAX);
+	cd->num_capture_channels = MIN(mic_chan, MIC_CHAN_MAX);
+
 	if (ref_rate != mic_rate || ref_rate != out_rate ||
 	    ref_rate != CONFIG_COMP_GOOGLE_RTC_AUDIO_PROCESSING_SAMPLE_RATE_HZ) {
 		comp_err(dev, "Incorrect source/sink sample rate, expect %d\n",
@@ -637,6 +640,11 @@ static int google_rtc_audio_processing_prepare(struct processing_module *mod,
 				source_get_channels(sources[cd->aec_reference_source]);
 	cd->out_frame_bytes = cd->ref_frame_bytes;
 
+	ret = GoogleRtcAudioProcessingSetStreamFormats(cd->state, mic_rate,
+						       cd->num_capture_channels,
+						       cd->num_capture_channels,
+						       ref_rate, cd->num_aec_reference_channels);
+
 	/* Blobs sent during COMP_STATE_READY is assigned to blob_handler->data
 	 * directly, so comp_is_new_data_blob_available always returns false.
 	 */