Merge Android R (rvc-dev-plus-aosp-without-vendor@6692709) (27203f54) · Commits · e / os / android_hardware_qcom_audio

hal/Android.mk

+3 −0

Original line number	Diff line number	Diff line
		@@ -226,6 +226,9 @@ endif

		LOCAL_SHARED_LIBRARIES += libbase libhidlbase libutils android.hardware.power@1.2 liblog

		LOCAL_SHARED_LIBRARIES += android.hardware.power-ndk_platform
		LOCAL_SHARED_LIBRARIES += libbinder_ndk

		LOCAL_SRC_FILES += audio_perf.cpp

		LOCAL_HEADER_LIBRARIES += libhardware_headers

hal/audio_hw.c

+138 −16

Original line number	Diff line number	Diff line
		@@ -72,6 +72,8 @@
		/* treat as unsigned Q1.13 */
		#define APP_TYPE_GAIN_DEFAULT 0x2000
		#define COMPRESS_PLAYBACK_VOLUME_MAX 0x2000
		#define PCM_PLAYBACK_VOLUME_MAX 0x2000
		#define INVALID_OUT_VOLUME -1

		/* treat as unsigned Q1.13 */
		#define VOIP_PLAYBACK_VOLUME_MAX 0x2000
		@@ -359,7 +361,8 @@ static unsigned int audio_device_ref_count;
		static int last_known_cal_step = -1 ;

		static int check_a2dp_restore_l(struct audio_device adev, struct stream_out out, bool restore);
		static int set_compr_volume(struct audio_stream_out *stream, float left, float right);
		static int out_set_compr_volume(struct audio_stream_out *stream, float left, float right);
		static int out_set_pcm_volume(struct audio_stream_out *stream, float left, float right);

		static int in_set_microphone_direction(const struct audio_stream_in *stream,
		audio_microphone_direction_t dir);
		@@ -2602,6 +2605,11 @@ int start_output_stream(struct stream_out *out)
		goto error_open;
		}
		}
		if ((out->usecase == USECASE_AUDIO_PLAYBACK_LOW_LATENCY
		\|\| out->usecase == USECASE_AUDIO_PLAYBACK_DEEP_BUFFER
		\|\| out->usecase == USECASE_AUDIO_PLAYBACK_ULL)) {
		out_set_pcm_volume(&out->stream, out->volume_l, out->volume_r);
		}
		}

		register_out_stream(out);
		@@ -2969,6 +2977,7 @@ static int out_set_parameters(struct audio_stream stream, const char kvpairs)
		bool select_new_device = false;
		int status = 0;
		bool bypass_a2dp = false;
		bool forced_speaker_fallback = false;

		ALOGD("%s: enter: usecase(%d: %s) kvpairs: %s",
		__func__, out->usecase, use_case_table[out->usecase], kvpairs);
		@@ -2990,6 +2999,7 @@ static int out_set_parameters(struct audio_stream stream, const char kvpairs)
		out_standby_l(&out->stream.common);
		}
		val = AUDIO_DEVICE_OUT_SPEAKER;
		forced_speaker_fallback = true;
		}

		pthread_mutex_lock(&adev->lock);
		@@ -3004,6 +3014,7 @@ static int out_set_parameters(struct audio_stream stream, const char kvpairs)
		if (out->devices == AUDIO_DEVICE_OUT_AUX_DIGITAL &&
		val == AUDIO_DEVICE_NONE) {
		val = AUDIO_DEVICE_OUT_SPEAKER;
		forced_speaker_fallback = true;
		}

		/*
		@@ -3018,6 +3029,7 @@ static int out_set_parameters(struct audio_stream stream, const char kvpairs)
		!audio_extn_a2dp_is_ready() &&
		!adev->bt_sco_on) {
		val = AUDIO_DEVICE_OUT_SPEAKER;
		forced_speaker_fallback = true;
		}

		/* To avoid a2dp to sco overlapping / BT device improper state
		@@ -3094,6 +3106,42 @@ static int out_set_parameters(struct audio_stream stream, const char kvpairs)
		}

		if (!out->standby) {
		int volume_delay_us = 0;
		if (out->flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) {
		pthread_mutex_lock(&out->compr_mute_lock);
		if (out->a2dp_compress_mute &&
		(!(new_dev & AUDIO_DEVICE_OUT_ALL_A2DP) \|\|
		audio_extn_a2dp_is_ready())) {
		out->a2dp_compress_mute = false;
		}
		float volume_l = out->volume_l;
		float volume_r = out->volume_r;
		if (out->a2dp_compress_mute \|\| forced_speaker_fallback) {
		volume_l = 0.0;
		volume_r = 0.0;
		}
		if (volume_l != out->applied_volume_l \|\| volume_r != out->applied_volume_r)
		volume_delay_us = COMPRESS_OFFLOAD_PLAYBACK_LATENCY * 2000;

		out_set_compr_volume(&out->stream, volume_l, volume_r);
		pthread_mutex_unlock(&out->compr_mute_lock);
		} else if (out->usecase == USECASE_AUDIO_PLAYBACK_LOW_LATENCY \|\|
		out->usecase == USECASE_AUDIO_PLAYBACK_DEEP_BUFFER \|\|
		out->usecase == USECASE_AUDIO_PLAYBACK_ULL) {
		float volume_l = out->volume_l;
		float volume_r = out->volume_r;
		if (forced_speaker_fallback) {
		volume_l = 0.0;
		volume_r = 0.0;
		}
		if (volume_l != out->applied_volume_l \|\| volume_r != out->applied_volume_r)
		volume_delay_us = (int)platform_render_latency(out) * 2;

		out_set_pcm_volume(&out->stream, volume_l, volume_r);
		}
		if (volume_delay_us > 0)
		usleep(volume_delay_us * 2);

		if (!same_dev) {
		ALOGV("update routing change");
		// inform adm before actual routing to prevent glitches.
		@@ -3120,14 +3168,7 @@ static int out_set_parameters(struct audio_stream stream, const char kvpairs)
		if (!same_dev)
		platform_set_swap_channels(adev, true);

		if ((out->flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) &&
		out->a2dp_compress_mute &&
		(!(out->devices & AUDIO_DEVICE_OUT_ALL_A2DP) \|\| audio_extn_a2dp_is_ready())) {
		pthread_mutex_lock(&out->compr_mute_lock);
		out->a2dp_compress_mute = false;
		set_compr_volume(&out->stream, out->volume_l, out->volume_r);
		pthread_mutex_unlock(&out->compr_mute_lock);
		}

		}

		}
		@@ -3286,7 +3327,7 @@ static uint32_t out_get_latency(const struct audio_stream_out *stream)
		// return a smaller number
		period_ms = (out->af_period_multiplier * out->config.period_size *
		1000) / (out->config.rate);
		hw_delay = platform_render_latency(out->usecase)/1000;
		hw_delay = platform_render_latency(out)/1000;
		return period_ms + hw_delay;
		}

		@@ -3299,7 +3340,7 @@ static uint32_t out_get_latency(const struct audio_stream_out *stream)
		return latency;
		}

		static int set_compr_volume(struct audio_stream_out *stream, float left,
		static int out_set_compr_volume(struct audio_stream_out *stream, float left,
		float right)
		{
		struct stream_out out = (struct stream_out )stream;
		@@ -3310,6 +3351,9 @@ static int set_compr_volume(struct audio_stream_out *stream, float left,
		int pcm_device_id = platform_get_pcm_device_id(out->usecase,
		PCM_PLAYBACK);

		if (left == out->applied_volume_l && right == out->applied_volume_r)
		return 0;

		snprintf(mixer_ctl_name, sizeof(mixer_ctl_name),
		"Compress Playback %d Volume", pcm_device_id);
		ctl = mixer_get_ctl_by_name(adev->mixer, mixer_ctl_name);
		@@ -3324,9 +3368,49 @@ static int set_compr_volume(struct audio_stream_out *stream, float left,
		volume[1] = (int)(right * COMPRESS_PLAYBACK_VOLUME_MAX);
		mixer_ctl_set_array(ctl, volume, sizeof(volume) / sizeof(volume[0]));

		out->applied_volume_l = left;
		out->applied_volume_r = right;
		return 0;
		}

		static int out_set_pcm_volume(struct audio_stream_out *stream, float left,
		float right)
		{
		struct stream_out out = (struct stream_out )stream;

		if (left == out->applied_volume_l && right == out->applied_volume_r)
		return 0;

		/* Volume control for pcm playback */
		if (left != right) {
		return -EINVAL;
		} else {
		char mixer_ctl_name[128];
		struct audio_device *adev = out->dev;
		struct mixer_ctl *ctl;
		int pcm_device_id = platform_get_pcm_device_id(out->usecase, PCM_PLAYBACK);
		snprintf(mixer_ctl_name, sizeof(mixer_ctl_name), "Playback %d Volume", pcm_device_id);
		ctl = mixer_get_ctl_by_name(adev->mixer, mixer_ctl_name);
		if (!ctl) {
		ALOGE("%s : Could not get ctl for mixer cmd - %s", __func__, mixer_ctl_name);
		return -EINVAL;
		}

		int volume = (int) (left * PCM_PLAYBACK_VOLUME_MAX);
		int ret = mixer_ctl_set_value(ctl, 0, volume);
		if (ret < 0) {
		ALOGE("%s: Could not set ctl, error:%d ", __func__, ret);
		return -EINVAL;
		}

		ALOGV("%s : Pcm set volume value %d left %f", __func__, volume, left);

		out->applied_volume_l = left;
		out->applied_volume_r = right;
		return 0;
		}
		}

		static int out_set_volume(struct audio_stream_out *stream, float left,
		float right)
		{
		@@ -3341,7 +3425,7 @@ static int out_set_volume(struct audio_stream_out *stream, float left,
		pthread_mutex_lock(&out->compr_mute_lock);
		ALOGV("%s: compress mute %d", __func__, out->a2dp_compress_mute);
		if (!out->a2dp_compress_mute)
		ret = set_compr_volume(stream, left, right);
		ret = out_set_compr_volume(stream, left, right);
		out->volume_l = left;
		out->volume_r = right;
		pthread_mutex_unlock(&out->compr_mute_lock);
		@@ -3770,7 +3854,7 @@ static int out_get_presentation_position(const struct audio_stream_out *stream,
		// This adjustment accounts for buffering after app processor.
		// It is based on estimated DSP latency per use case, rather than exact.
		signed_frames -=
		(platform_render_latency(out->usecase) * out->sample_rate / 1000000LL);
		(platform_render_latency(out) * out->sample_rate / 1000000LL);

		// Adjustment accounts for A2DP encoder latency with non-offload usecases
		// Note: Encoder latency is returned in ms, while platform_render_latency in us.
		@@ -4490,7 +4574,8 @@ static int in_get_capture_position(const struct audio_stream_in *stream,
		unsigned int avail;
		if (pcm_get_htimestamp(in->pcm, &avail, &timestamp) == 0) {
		*frames = in->frames_read + avail;
		time = timestamp.tv_sec 1000000000LL + timestamp.tv_nsec;
		time = timestamp.tv_sec 1000000000LL + timestamp.tv_nsec
		- platform_capture_latency(in) * 1000LL;
		ret = 0;
		}
		}
		@@ -4917,6 +5002,30 @@ static void in_update_sink_metadata(struct audio_stream_in *stream,
		pthread_mutex_unlock(&in->lock);
		}

		static int check_and_set_gapless_mode(struct audio_device *adev)
		{
		bool gapless_enabled = false;
		const char *mixer_ctl_name = "Compress Gapless Playback";
		struct mixer_ctl *ctl;

		ALOGV("%s:", __func__);
		gapless_enabled = property_get_bool("vendor.audio.offload.gapless.enabled", false);

		ctl = mixer_get_ctl_by_name(adev->mixer, mixer_ctl_name);
		if (!ctl) {
		ALOGE("%s: Could not get ctl for mixer cmd - %s",
		__func__, mixer_ctl_name);
		return -EINVAL;
		}

		if (mixer_ctl_set_value(ctl, 0, gapless_enabled) < 0) {
		ALOGE("%s: Could not set gapless mode %d",
		__func__, gapless_enabled);
		return -EINVAL;
		}
		return 0;
		}

		static int adev_open_output_stream(struct audio_hw_device *dev,
		audio_io_handle_t handle,
		audio_devices_t devices,
		@@ -5085,6 +5194,9 @@ static int adev_open_output_stream(struct audio_hw_device *dev,
		out->non_blocking = 1;

		out->send_new_metadata = 1;

		check_and_set_gapless_mode(adev);

		create_offload_callback_thread(out);
		ALOGV("%s: offloaded output offload_info version %04x bit rate %d",
		__func__, config->offload_info.version,
		@@ -5292,6 +5404,13 @@ static int adev_open_output_stream(struct audio_hw_device *dev,
		}
		}

		if (out->usecase == USECASE_AUDIO_PLAYBACK_LOW_LATENCY \|\|
		out->usecase == USECASE_AUDIO_PLAYBACK_DEEP_BUFFER \|\|
		out->usecase == USECASE_AUDIO_PLAYBACK_ULL) {
		out->volume_l = 1.0;
		out->volume_r = 1.0;
		}

		if (config->sample_rate == 0) {
		out->sample_rate = out->config.rate;
		} else {
		@@ -5374,6 +5493,9 @@ static int adev_open_output_stream(struct audio_hw_device *dev,
		}
		pthread_mutex_unlock(&adev->lock);

		out->applied_volume_l = INVALID_OUT_VOLUME;
		out->applied_volume_r = INVALID_OUT_VOLUME;

		out->stream.common.get_sample_rate = out_get_sample_rate;
		out->stream.common.set_sample_rate = out_set_sample_rate;
		out->stream.common.get_buffer_size = out_get_buffer_size;
		@@ -6386,7 +6508,7 @@ static int check_a2dp_restore_l(struct audio_device adev, struct stream_out ou
		if ((out->flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) &&
		(out->a2dp_compress_mute)) {
		out->a2dp_compress_mute = false;
		set_compr_volume(&out->stream, out->volume_l, out->volume_r);
		out_set_compr_volume(&out->stream, out->volume_l, out->volume_r);
		}
		pthread_mutex_unlock(&out->compr_mute_lock);
		}
		@@ -6403,7 +6525,7 @@ static int check_a2dp_restore_l(struct audio_device adev, struct stream_out ou
		right_p = out->volume_r;
		if (out->offload_state == OFFLOAD_STATE_PLAYING)
		compress_pause(out->compr);
		set_compr_volume(&out->stream, 0.0f, 0.0f);
		out_set_compr_volume(&out->stream, 0.0f, 0.0f);
		out->a2dp_compress_mute = true;
		select_devices(adev, out->usecase);
		if (out->offload_state == OFFLOAD_STATE_PLAYING)

hal/audio_hw.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -256,6 +256,8 @@ struct stream_out {
		bool a2dp_compress_mute;
		float volume_l;
		float volume_r;
		float applied_volume_l;
		float applied_volume_r;

		error_log_t *error_log;

hal/audio_perf.cpp

+189 −68

Original line number	Diff line number	Diff line
		@@ -22,95 +22,216 @@
		#include <utils/Mutex.h>

		#include <android/hardware/power/1.2/IPower.h>
		#include <aidl/android/hardware/power/Boost.h>
		#include <aidl/android/hardware/power/IPower.h>
		#include <aidl/android/hardware/power/Mode.h>
		#include <android/binder_manager.h>

		#include "audio_perf.h"

		using android::hardware::power::V1_2::IPower;
		using android::hardware::power::V1_2::PowerHint;
		using android::hardware::power::V1_2::toString;
		using android::hardware::Return;
		using android::hardware::Void;
		using android::hardware::hidl_death_recipient;
		using android::hidl::base::V1_0::IBase;

		// Do not use gPowerHAL, use getPowerHal to retrieve a copy instead
		static android::sp<IPower> gPowerHal_ = nullptr;
		// Protect gPowerHal_
		// Protect gPowerHal_1_2_ and gPowerHal_Aidl_
		static android::sp<android::hardware::power::V1_2::IPower> gPowerHal_1_2_;
		static std::shared_ptr<aidl::android::hardware::power::IPower> gPowerHal_Aidl_;
		static std::mutex gPowerHalMutex;
		static constexpr int kDefaultBoostDurationMs = 2000;
		static constexpr int kBoostOff = -1;

		// PowerHalDeathRecipient to invalid the client when service dies
		struct PowerHalDeathRecipient : virtual public hidl_death_recipient {
		// hidl_death_recipient interface
		virtual void serviceDied(uint64_t, const android::wp<IBase>&) override {
		std::lock_guard<std::mutex> lock(gPowerHalMutex);
		ALOGE("PowerHAL just died");
		gPowerHal_ = nullptr;
		}
		static const std::string kInstance =
		std::string(aidl::android::hardware::power::IPower::descriptor) + "/default";

		enum hal_version {
		NONE,
		HIDL_1_2,
		AIDL,
		};

		// Retrieve a copy of client
		static android::sp<IPower> getPowerHal() {
		std::lock_guard<std::mutex> lock(gPowerHalMutex);
		static android::sp<PowerHalDeathRecipient> gPowerHalDeathRecipient = nullptr;
		static bool gPowerHalExists = true;
		// Connnect PowerHAL
		static hal_version connectPowerHalLocked() {
		static bool gPowerHalHidlExists = true;
		static bool gPowerHalAidlExists = true;

		if (gPowerHalExists && gPowerHal_ == nullptr) {
		gPowerHal_ = IPower::getService();
		if (!gPowerHalHidlExists && !gPowerHalAidlExists) {
		return NONE;
		}

		if (gPowerHal_ == nullptr) {
		ALOGE("Unable to get Power service");
		gPowerHalExists = false;
		} else {
		if (gPowerHalDeathRecipient == nullptr) {
		gPowerHalDeathRecipient = new PowerHalDeathRecipient();
		}
		Return<bool> linked = gPowerHal_->linkToDeath(
		gPowerHalDeathRecipient, 0 /* cookie */);
		if (!linked.isOk()) {
		ALOGE("Transaction error in linking to PowerHAL death: %s",
		linked.description().c_str());
		gPowerHal_ = nullptr;
		} else if (!linked) {
		ALOGW("Unable to link to PowerHal death notifications");
		gPowerHal_ = nullptr;
		if (gPowerHalHidlExists) {
		// (re)connect if handle is null
		if (!gPowerHal_1_2_) {
		gPowerHal_1_2_ =
		android::hardware::power::V1_2::IPower::getService();
		}
		if (gPowerHal_1_2_) {
		ALOGV("Successfully connected to Power Hal Hidl service.");
		return HIDL_1_2;
		} else {
		ALOGD("Connect to PowerHAL and link to death "
		"notification successfully");
		// no more try on this handle
		gPowerHalHidlExists = false;
		}
		}

		if (gPowerHalAidlExists) {
		// (re)connect if handle is null
		if (!gPowerHal_Aidl_) {
		ndk::SpAIBinder pwBinder = ndk::SpAIBinder(
		AServiceManager_getService(kInstance.c_str()));
		gPowerHal_Aidl_ = aidl::android::hardware::power::IPower::fromBinder(pwBinder);
		}
		if (gPowerHal_Aidl_) {
		ALOGV("Successfully connected to Power Hal Aidl service.");
		return AIDL;
		} else {
		// no more try on this handle
		gPowerHalAidlExists = false;
		}
		return gPowerHal_;
		}

		static bool powerHint(PowerHint hint, int32_t data) {
		android::sp<IPower> powerHal = getPowerHal();
		if (powerHal == nullptr) {
		return false;
		return NONE;
		}

		auto ret = powerHal->powerHintAsync_1_2(hint, data);

		bool audio_streaming_hint_start() {
		std::lock_guard<std::mutex> lock(gPowerHalMutex);
		switch(connectPowerHalLocked()) {
		case NONE:
		return false;
		case HIDL_1_2:
		{
		auto ret = gPowerHal_1_2_->powerHintAsync_1_2(
		android::hardware::power::V1_2::PowerHint::AUDIO_STREAMING,
		1);
		if (!ret.isOk()) {
		ALOGE("powerHint failed, hint: %s, data: %" PRId32 ", error: %s",
		toString(hint).c_str(),
		data,
		ALOGE("powerHint failed, error: %s",
		ret.description().c_str());
		gPowerHal_1_2_ = nullptr;
		return false;
		}
		return ret.isOk();
		return true;
		}
		case AIDL:
		{
		auto ret = gPowerHal_Aidl_->setBoost(
		aidl::android::hardware::power::Boost::AUDIO_LAUNCH,
		kDefaultBoostDurationMs);
		if (!ret.isOk()) {
		std::string err = ret.getDescription();
		ALOGE("Failed to set power hint. Error: %s", err.c_str());
		gPowerHal_Aidl_ = nullptr;
		return false;
		}
		return true;
		}
		default:
		ALOGE("Unknown HAL state");
		return false;
		}

		int audio_streaming_hint_start() {
		return powerHint(PowerHint::AUDIO_STREAMING, 1);
		}

		int audio_streaming_hint_end() {
		return powerHint(PowerHint::AUDIO_STREAMING, 0);
		bool audio_streaming_hint_end() {
		std::lock_guard<std::mutex> lock(gPowerHalMutex);
		switch(connectPowerHalLocked()) {
		case NONE:
		return false;
		case HIDL_1_2:
		{
		auto ret = gPowerHal_1_2_->powerHintAsync_1_2(
		android::hardware::power::V1_2::PowerHint::AUDIO_STREAMING,
		0);
		if (!ret.isOk()) {
		ALOGE("powerHint failed, error: %s",
		ret.description().c_str());
		gPowerHal_1_2_ = nullptr;
		return false;
		}
		return true;
		}
		case AIDL:
		{
		auto ret = gPowerHal_Aidl_->setBoost(
		aidl::android::hardware::power::Boost::AUDIO_LAUNCH,
		kBoostOff);
		if (!ret.isOk()) {
		std::string err = ret.getDescription();
		ALOGE("Failed to set power hint. Error: %s", err.c_str());
		gPowerHal_Aidl_ = nullptr;
		return false;
		}
		return true;
		}
		default:
		ALOGE("Unknown HAL state");
		return false;
		}
		}

		int audio_low_latency_hint_start() {
		return powerHint(PowerHint::AUDIO_LOW_LATENCY, 1);
		bool audio_low_latency_hint_start() {
		std::lock_guard<std::mutex> lock(gPowerHalMutex);
		switch(connectPowerHalLocked()) {
		case NONE:
		return false;
		case HIDL_1_2:
		{
		auto ret = gPowerHal_1_2_->powerHintAsync_1_2(
		android::hardware::power::V1_2::PowerHint::AUDIO_LOW_LATENCY,
		1);
		if (!ret.isOk()) {
		ALOGE("powerHint failed, error: %s",
		ret.description().c_str());
		gPowerHal_1_2_ = nullptr;
		return false;
		}
		return true;
		}
		case AIDL:
		{
		auto ret = gPowerHal_Aidl_->setMode(
		aidl::android::hardware::power::Mode::AUDIO_STREAMING_LOW_LATENCY,
		true);
		if (!ret.isOk()) {
		std::string err = ret.getDescription();
		ALOGE("Failed to set power hint. Error: %s", err.c_str());
		gPowerHal_Aidl_ = nullptr;
		return false;
		}
		return true;
		}
		default:
		ALOGE("Unknown HAL state");
		return false;
		}
		}

		int audio_low_latency_hint_end() {
		return powerHint(PowerHint::AUDIO_LOW_LATENCY, 0);
		bool audio_low_latency_hint_end() {
		std::lock_guard<std::mutex> lock(gPowerHalMutex);
		switch(connectPowerHalLocked()) {
		case NONE:
		return false;
		case HIDL_1_2:
		{
		auto ret = gPowerHal_1_2_->powerHintAsync_1_2(
		android::hardware::power::V1_2::PowerHint::AUDIO_LOW_LATENCY,
		0);
		if (!ret.isOk()) {
		ALOGE("powerHint failed, error: %s",
		ret.description().c_str());
		gPowerHal_1_2_ = nullptr;
		return false;
		}
		return true;
		}
		case AIDL:
		{
		auto ret = gPowerHal_Aidl_->setMode(
		aidl::android::hardware::power::Mode::AUDIO_STREAMING_LOW_LATENCY,
		false);
		if (!ret.isOk()) {
		std::string err = ret.getDescription();
		ALOGE("Failed to set power hint. Error: %s", err.c_str());
		gPowerHal_Aidl_ = nullptr;
		return false;
		}
		return true;
		}
		default:
		ALOGE("Unknown HAL state");
		return false;
		}
		}

hal/audio_perf.h

+7 −5

Original line number	Diff line number	Diff line
		@@ -17,15 +17,17 @@
		#ifndef __QAUDIOPERF_H__
		#define __QAUDIOPERF_H__

		#include <stdbool.h>

		#ifdef __cplusplus
		extern "C" {
		#endif

		int audio_streaming_hint_start();
		int audio_streaming_hint_end();

		int audio_low_latency_hint_start();
		int audio_low_latency_hint_end();
		// return true on success, false on failure
		bool audio_streaming_hint_start();
		bool audio_streaming_hint_end();
		bool audio_low_latency_hint_start();
		bool audio_low_latency_hint_end();

		#ifdef __cplusplus
		}