audio: add support for multichannel to dual mono conversion (f51b584d) · Commits · e / devices / Fairphone 4 / android_hardware_qcom_audio

hal/audio_extn/audio_extn.c

+70 −0

Original line number	Diff line number	Diff line
		@@ -63,6 +63,8 @@

		#define MAX_SLEEP_RETRY 100
		#define WIFI_INIT_WAIT_SLEEP 50
		#define MAX_NUM_CHANNELS 8
		#define Q14_GAIN_UNITY 0x4000

		struct audio_extn_module {
		bool anc_enabled;
		@@ -1485,3 +1487,71 @@ int audio_extn_set_device_cfg_params(struct audio_device *adev,

		return 0;
		}

		void audio_extn_send_dual_mono_mixing_coefficients(struct stream_out *out)
		{
		struct audio_device *adev = out->dev;
		struct mixer_ctl *ctl;
		char mixer_ctl_name[128];
		int cust_ch_mixer_cfg[128], len = 0;
		int ip_channel_cnt = audio_channel_count_from_out_mask(out->channel_mask);
		int pcm_device_id = platform_get_pcm_device_id(out->usecase, PCM_PLAYBACK);
		int op_channel_cnt= 2;
		int i, j, err;

		ALOGV("%s", __func__);
		if (!out->started) {
		out->set_dual_mono = true;
		goto exit;
		}

		ALOGD("%s: i/p channel count %d, o/p channel count %d, pcm id %d", __func__,
		ip_channel_cnt, op_channel_cnt, pcm_device_id);

		snprintf(mixer_ctl_name, sizeof(mixer_ctl_name),
		"Audio Stream %d Channel Mix Cfg", pcm_device_id);
		ctl = mixer_get_ctl_by_name(adev->mixer, mixer_ctl_name);
		if (!ctl) {
		ALOGE("%s: ERROR. Could not get ctl for mixer cmd - %s",
		__func__, mixer_ctl_name);
		goto exit;
		}

		/* Output channel count corresponds to backend configuration channels.
		* Input channel count corresponds to ASM session channels.
		* Set params is called with channels that need to be selected from
		* input to generate output.
		* ex: "8,2" to downmix from 8 to 2 i.e. to downmix from 8 to 2,
		*
		* This mixer control takes values in the following sequence:
		* - input channel count(m)
		* - output channel count(n)
		* - weight coeff for [out ch#1, in ch#1]
		* ....
		* - weight coeff for [out ch#1, in ch#m]
		*
		* - weight coeff for [out ch#2, in ch#1]
		* ....
		* - weight coeff for [out ch#2, in ch#m]
		*
		* - weight coeff for [out ch#n, in ch#1]
		* ....
		* - weight coeff for [out ch#n, in ch#m]
		*
		* To get dualmono ouptu weightage coeff is calculated as Unity gain
		* divided by number of input channels.
		*/
		cust_ch_mixer_cfg[len++] = ip_channel_cnt;
		cust_ch_mixer_cfg[len++] = op_channel_cnt;
		for (i = 0; i < op_channel_cnt; i++) {
		for (j = 0; j < ip_channel_cnt; j++) {
		cust_ch_mixer_cfg[len++] = Q14_GAIN_UNITY/ip_channel_cnt;
		}
		}

		err = mixer_ctl_set_array(ctl, cust_ch_mixer_cfg, len);
		if (err)
		ALOGE("%s: ERROR. Mixer ctl set failed", __func__);
		exit:
		return;
		}

hal/audio_extn/audio_extn.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -42,6 +42,8 @@
		#include "adsp_hdlr.h"
		#include "ip_hdlr_intf.h"

		#define AUDIO_PARAMETER_DUAL_MONO "dual_mono"

		#ifndef AFE_PROXY_ENABLED
		#define AUDIO_DEVICE_OUT_PROXY 0x40000
		#endif
		@@ -1033,4 +1035,10 @@ void audio_extn_ffv_check_and_append_ec_ref_dev(char *device_name);
		snd_device_t audio_extn_ffv_get_capture_snd_device();
		void audio_extn_ffv_append_ec_ref_dev_name(char *device_name);
		#endif

		#ifndef CUSTOM_STEREO_ENABLED
		#define audio_extn_send_dual_mono_mixing_coefficients(out) (0)
		#else
		void audio_extn_send_dual_mono_mixing_coefficients(struct stream_out *out);
		#endif
		#endif /* AUDIO_EXTN_H */

hal/audio_hw.c

+12 −2

Original line number	Diff line number	Diff line
		@@ -3076,6 +3076,8 @@ int start_output_stream(struct stream_out *out)
		}
		break;
		}
		platform_set_stream_channel_map(adev->platform, out->channel_mask,
		out->pcm_device_id, &out->channel_map_param.channel_map[0]);

		ALOGV("%s: pcm_prepare", __func__);
		if (pcm_is_ready(out->pcm)) {
		@@ -3089,8 +3091,6 @@ int start_output_stream(struct stream_out *out)
		goto error_open;
		}
		}
		platform_set_stream_channel_map(adev->platform, out->channel_mask,
		out->pcm_device_id, &out->channel_map_param.channel_map[0]);
		// apply volume for voip playback after path is set up
		if (out->usecase == USECASE_AUDIO_PLAYBACK_VOIP)
		out_set_voip_volume(&out->stream, out->volume_l, out->volume_r);
		@@ -3775,6 +3775,13 @@ static int out_set_parameters(struct audio_stream stream, const char kvpairs)
		pthread_mutex_unlock(&out->lock);
		}

		err = str_parms_get_str(parms, AUDIO_PARAMETER_DUAL_MONO, value,
		sizeof(value));
		if (err >= 0) {
		if (!strncmp("true", value, sizeof("true")) \|\| atoi(value))
		audio_extn_send_dual_mono_mixing_coefficients(out);
		}

		err = str_parms_get_str(parms, AUDIO_PARAMETER_STREAM_PROFILE, value, sizeof(value));
		if (err >= 0) {
		strlcpy(out->profile, value, sizeof(out->profile));
		@@ -4342,6 +4349,8 @@ static ssize_t out_write(struct audio_stream_out stream, const void buffer,
		ret = -EINVAL;
		goto exit;
		}
		if (out->set_dual_mono)
		audio_extn_send_dual_mono_mixing_coefficients(out);
		}

		if (adev->is_channel_status_set == false && (out->devices & AUDIO_DEVICE_OUT_AUX_DIGITAL)){
		@@ -5639,6 +5648,7 @@ int adev_open_output_stream(struct audio_hw_device *dev,
		out->a2dp_compress_mute = false;
		out->hal_output_suspend_supported = 0;
		out->dynamic_pm_qos_config_supported = 0;
		out->set_dual_mono = false;

		if ((flags & AUDIO_OUTPUT_FLAG_BD) &&
		(property_get_bool("vendor.audio.matrix.limiter.enable", false)))

hal/audio_hw.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -357,6 +357,7 @@ struct stream_out {
		bool stream_config_changed;
		mix_matrix_params_t pan_scale_params;
		mix_matrix_params_t downmix_params;
		bool set_dual_mono;
		};

		struct stream_in {

qahw_api/test/qahw_playback_test.c

+14 −1

Original line number	Diff line number	Diff line
		@@ -251,6 +251,7 @@ static void init_streams(void)
		stream_param[i].ethread_data = nullptr;
		stream_param[i].device_url = "stream";
		stream_param[i].play_later = false;
		stream_param[i].set_params = nullptr;

		pthread_mutex_init(&stream_param[i].write_lock, (const pthread_mutexattr_t *)NULL);
		pthread_cond_init(&stream_param[i].write_cond, (const pthread_condattr_t *) NULL);
		@@ -797,6 +798,14 @@ void start_stream_playback (void stream_data)
		if (bytes_to_read <= 0)
		read_complete_file = true;

		if (params->set_params) {
		rc = qahw_out_set_parameters(params->out_handle, params->set_params);
		if (rc) {
		fprintf(log_file, "stream %s: failed to set kvpairs\n", params->set_params);
		fprintf(stderr, "stream %s: failed to set kvpairs\n", params->set_params);
		}
		}

		while (!exit && !stop_playback) {
		if (!bytes_remaining) {
		fprintf(log_file, "\nstream %d: reading bytes %zd\n", params->stream_index, bytes_wanted);
		@@ -2095,7 +2104,7 @@ int main(int argc, char* argv[]) {

		while ((opt = getopt_long(argc,
		argv,
		"-f:r:c:b:d:s:v:V:l:t:a:w:k:PD:KF:Ee:A:u:m:S:C:p::x:y:qQh:i:h:g:",
		"-f:r:c:b:d:s:v:V:l:t:a:w:k:PD:KF:Ee:A:u:m:S:C:p::x:y:qQh:i:h:g:O:",
		long_options,
		&option_index)) != -1) {

		@@ -2233,6 +2242,9 @@ int main(int argc, char* argv[]) {
		case 'K':
		kpi_mode = true;
		break;
		case 'O':
		stream_param[i].set_params = optarg;
		break;
		case 'F':
		stream_param[i].flags = atoll(optarg);
		stream_param[i].flags_set = true;
		@@ -2533,6 +2545,7 @@ int main(int argc, char* argv[]) {
		fprintf(log_file, "stream %d: Bitwidth:%d\n", stream->stream_index, stream->config.offload_info.bit_width);
		fprintf(log_file, "stream %d: AAC Format Type:%d\n", stream->stream_index, stream->aac_fmt_type);
		fprintf(log_file, "stream %d: Kvpair Values:%s\n", stream->stream_index, stream->kvpair_values);
		fprintf(log_file, "stream %d: set params Values:%s\n", stream->stream_index, stream->set_params);
		fprintf(log_file, "Log file:%s\n", log_filename);
		fprintf(log_file, "Volume level:%f\n", vol_level);