A2DP: BluetoothA2dp@1.0 is deprecated (a5131a64) · Commits · e / os / android_packages_modules_Bluetooth

system/btif/Android.bp

+0 −1

Original line number	Diff line number	Diff line
		@@ -53,7 +53,6 @@ cc_library_static {
		"src/bluetooth.cc",
		// BTIF implementation
		"src/btif_a2dp.cc",
		"src/btif_a2dp_audio_interface.cc",
		"src/btif_a2dp_control.cc",
		"src/btif_a2dp_sink.cc",
		"src/btif_a2dp_source.cc",

system/btif/BUILD.gn

+0 −3

Original line number	Diff line number	Diff line
		@@ -36,9 +36,6 @@ static_library("btif") {
		# BTIF implementation
		"src/btif_a2dp.cc",

		# "TODO(abps) - Move this abstraction elsewhere
		# "src/btif_a2dp_audio_interface.cc",
		"src/btif_a2dp_audio_interface_linux.cc",
		"src/btif_a2dp_control.cc",
		"src/btif_a2dp_sink.cc",
		"src/btif_a2dp_source.cc",

system/btif/include/btif_a2dp_audio_interface.h

deleted100644 → 0

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Original line number	Diff line number	Diff line
		/******************************************************************************
		*
		* Copyright (C) 2016 The Android Open Source Project
		* Copyright (C) 2009-2012 Broadcom Corporation
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at:
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*
		******************************************************************************/

		#ifndef BTIF_A2DP_AUDIO_INTERFACE_H
		#define BTIF_A2DP_AUDIO_INTERFACE_H

		#include "bta_av_api.h"

		/Default LDAC bitrate /
		#define DEFAULT_LDAC_BITRATE_48KHZ 660000
		#define DEFAULT_LDAC_BITRATE_441KHZ 606000

		void btif_a2dp_audio_on_started(tBTA_AV_STATUS status);
		void btif_a2dp_audio_on_stopped(tBTA_AV_STATUS status);
		void btif_a2dp_audio_on_suspended(tBTA_AV_STATUS status);
		void btif_a2dp_audio_interface_start_session(void);
		void btif_a2dp_audio_interface_end_session(void);

		#endif /* BTIF_A2DP_AUDIO_INTERFACE_H */

system/btif/src/btif_a2dp.cc

+0 −16

Original line number	Diff line number	Diff line
		@@ -26,7 +26,6 @@
		#include "bt_common.h"
		#include "bta_av_api.h"
		#include "btif_a2dp.h"
		#include "btif_a2dp_audio_interface.h"
		#include "btif_a2dp_control.h"
		#include "btif_a2dp_sink.h"
		#include "btif_a2dp_source.h"
		@@ -59,10 +58,6 @@ bool btif_a2dp_on_started(const RawAddress& peer_addr, tBTA_AV_START* p_av_start
		* this is not for BTA_AV_START_EVT. */
		if (bluetooth::audio::a2dp::is_hal_2_0_enabled()) {
		bluetooth::audio::a2dp::ack_stream_started(status);
		} else if (btif_av_is_a2dp_offload_enabled()) {
		// TODO: BluetoothA2dp@1.0 is deprecated
		btif_a2dp_audio_on_started(
		(status == A2DP_CTRL_ACK_SUCCESS) ? BTA_AV_SUCCESS : BTA_AV_FAIL_SDP);
		} else {
		btif_a2dp_command_ack(status);
		}
		@@ -99,9 +94,6 @@ bool btif_a2dp_on_started(const RawAddress& peer_addr, tBTA_AV_START* p_av_start
		LOG(ERROR) << __func__ << ": peer " << peer_addr << " A2DP start request failed: status = " << +p_av_start->status;
		if (bluetooth::audio::a2dp::is_hal_2_0_enabled()) {
		bluetooth::audio::a2dp::ack_stream_started(A2DP_CTRL_ACK_FAILURE);
		} else if (btif_av_is_a2dp_offload_enabled()) {
		// TODO: BluetoothA2dp@1.0 is deprecated
		btif_a2dp_audio_on_started(p_av_start->status);
		} else {
		btif_a2dp_command_ack(A2DP_CTRL_ACK_FAILURE);
		}
		@@ -120,9 +112,6 @@ void btif_a2dp_on_stopped(tBTA_AV_SUSPEND* p_av_suspend) {
		if (bluetooth::audio::a2dp::is_hal_2_0_enabled() \|\|
		!btif_av_is_a2dp_offload_running()) {
		btif_a2dp_source_on_stopped(p_av_suspend);
		} else if (p_av_suspend != NULL) {
		// TODO: BluetoothA2dp@1.0 is deprecated
		btif_a2dp_audio_on_stopped(p_av_suspend->status);
		}
		}

		@@ -136,9 +125,6 @@ void btif_a2dp_on_suspended(tBTA_AV_SUSPEND* p_av_suspend) {
		if (bluetooth::audio::a2dp::is_hal_2_0_enabled() \|\|
		!btif_av_is_a2dp_offload_running()) {
		btif_a2dp_source_on_suspended(p_av_suspend);
		} else if (p_av_suspend != NULL) {
		// TODO: BluetoothA2dp@1.0 is deprecated
		btif_a2dp_audio_on_suspended(p_av_suspend->status);
		}
		}

		@@ -177,8 +163,6 @@ void btif_a2dp_on_offload_started(const RawAddress& peer_addr,
		bluetooth::audio::a2dp::ack_stream_started(ack);
		} else {
		btif_a2dp_command_ack(ack);
		// TODO: BluetoothA2dp@1.0 is deprecated
		btif_a2dp_audio_on_started(status);
		}
		}

system/btif/src/btif_a2dp_audio_interface.cc

deleted100644 → 0

+0 −505

Original line number	Diff line number	Diff line
		/******************************************************************************
		*
		* Copyright (C) 2017 Google, Inc.
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at:
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*
		******************************************************************************/

		#define LOG_TAG "btif_a2dp_audio_interface"

		#include <android/hardware/bluetooth/a2dp/1.0/IBluetoothAudioHost.h>
		#include <android/hardware/bluetooth/a2dp/1.0/IBluetoothAudioOffload.h>
		#include <android/hardware/bluetooth/a2dp/1.0/types.h>
		#include <base/bind.h>
		#include <base/callback.h>
		#include <base/location.h>
		#include <hwbinder/ProcessState.h>
		#include <mutex>

		#include "audio_a2dp_hw/include/audio_a2dp_hw.h"
		#include "bta/av/bta_av_int.h"
		#include "bta/include/bta_av_api.h"
		#include "btif/include/btif_a2dp_source.h"
		#include "btif/include/btif_av.h"
		#include "btif/include/btif_av_co.h"
		#include "btif/include/btif_hf.h"
		#include "common/metrics.h"
		#include "common/time_util.h"
		#include "osi/include/log.h"
		#include "stack/include/a2dp_codec_api.h"
		#include "stack/include/avdt_api.h"
		#include "stack/include/btu.h" // do_in_main_thread

		using bluetooth::common::A2dpSessionMetrics;
		using bluetooth::common::BluetoothMetricsLogger;

		using android::hardware::bluetooth::a2dp::V1_0::IBluetoothAudioOffload;
		using android::hardware::bluetooth::a2dp::V1_0::IBluetoothAudioHost;
		using android::hardware::bluetooth::a2dp::V1_0::Status;
		using android::hardware::bluetooth::a2dp::V1_0::CodecConfiguration;
		using android::hardware::bluetooth::a2dp::V1_0::CodecType;
		using android::hardware::bluetooth::a2dp::V1_0::SampleRate;
		using android::hardware::bluetooth::a2dp::V1_0::BitsPerSample;
		using android::hardware::bluetooth::a2dp::V1_0::ChannelMode;
		using android::hardware::ProcessState;
		using ::android::hardware::Return;
		using ::android::hardware::Void;
		using ::android::hardware::hidl_death_recipient;
		using ::android::hardware::hidl_vec;
		using ::android::sp;
		using ::android::wp;
		android::sp<IBluetoothAudioOffload> btAudio;

		#define CASE_RETURN_STR(const) \
		case const: \
		return #const;
		static uint8_t a2dp_cmd_pending = A2DP_CTRL_CMD_NONE;
		static Status mapToStatus(uint8_t resp);
		uint8_t btif_a2dp_audio_process_request(uint8_t cmd);

		static void btif_a2dp_audio_send_start_req();
		static void btif_a2dp_audio_send_suspend_req();
		static void btif_a2dp_audio_send_stop_req();
		static void btif_a2dp_audio_interface_init();
		static void btif_a2dp_audio_interface_deinit();
		static void btif_a2dp_audio_interface_restart_session();
		// Delay reporting
		// static void btif_a2dp_audio_send_sink_latency();

		class A2dpOffloadAudioStats {
		public:
		A2dpOffloadAudioStats() { Reset(); }
		void Reset() {
		std::lock_guard<std::recursive_mutex> lock(lock_);
		ResetPreserveSession();
		codec_index_ = -1;
		}
		void ResetPreserveSession() {
		std::lock_guard<std::recursive_mutex> lock(lock_);
		audio_start_time_ms_ = -1;
		audio_stop_time_ms_ = -1;
		}
		void StoreMetrics() {
		std::lock_guard<std::recursive_mutex> lock(lock_);
		if (audio_start_time_ms_ < 0 \|\| audio_stop_time_ms_ < 0) {
		return;
		}
		A2dpSessionMetrics metrics;
		metrics.codec_index = codec_index_;
		metrics.is_a2dp_offload = true;
		if (audio_stop_time_ms_ > audio_start_time_ms_) {
		metrics.audio_duration_ms = audio_stop_time_ms_ - audio_start_time_ms_;
		}
		BluetoothMetricsLogger::GetInstance()->LogA2dpSession(metrics);
		}
		void LogAudioStart() {
		std::lock_guard<std::recursive_mutex> lock(lock_);
		audio_start_time_ms_ = bluetooth::common::time_get_os_boottime_ms();
		}
		void LogAudioStop() {
		std::lock_guard<std::recursive_mutex> lock(lock_);
		audio_stop_time_ms_ = bluetooth::common::time_get_os_boottime_ms();
		}
		void LogAudioStopMetricsAndReset() {
		std::lock_guard<std::recursive_mutex> lock(lock_);
		LogAudioStop();
		StoreMetrics();
		ResetPreserveSession();
		}
		void SetCodecIndex(int64_t codec_index) {
		std::lock_guard<std::recursive_mutex> lock(lock_);
		codec_index_ = codec_index;
		}

		private:
		std::recursive_mutex lock_;
		int64_t audio_start_time_ms_ = -1;
		int64_t audio_stop_time_ms_ = -1;
		int64_t codec_index_ = -1;
		};

		static A2dpOffloadAudioStats a2dp_offload_audio_stats;

		class BluetoothAudioHost : public IBluetoothAudioHost {
		public:
		Return<void> startStream() override {
		btif_a2dp_audio_send_start_req();
		return Void();
		}
		Return<void> suspendStream() override {
		btif_a2dp_audio_send_suspend_req();
		return Void();
		}
		Return<void> stopStream() override {
		btif_a2dp_audio_send_stop_req();
		return Void();
		}

		// TODO : Delay reporting
		/* Return<void> a2dp_get_sink_latency() {
		LOG_INFO("%s:start ", __func__);
		btif_a2dp_audio_send_sink_latency();
		return Void();
		}*/
		};

		class BluetoothAudioDeathRecipient : public hidl_death_recipient {
		public:
		void serviceDied(
		uint64_t /cookie/,
		const wp<::android::hidl::base::V1_0::IBase>& /who/) override {
		LOG_ERROR("%s", __func__);
		// Restart the session on the correct thread
		do_in_main_thread(FROM_HERE,
		base::Bind(&btif_a2dp_audio_interface_restart_session));
		}
		};
		sp<BluetoothAudioDeathRecipient> bluetoothAudioDeathRecipient =
		new BluetoothAudioDeathRecipient();

		static Status mapToStatus(uint8_t resp) {
		switch (resp) {
		case A2DP_CTRL_ACK_SUCCESS:
		return Status::SUCCESS;
		break;
		case A2DP_CTRL_ACK_PENDING:
		return Status::PENDING;
		break;
		case A2DP_CTRL_ACK_FAILURE:
		case A2DP_CTRL_ACK_INCALL_FAILURE:
		case A2DP_CTRL_ACK_DISCONNECT_IN_PROGRESS:
		return Status::FAILURE;
		default:
		APPL_TRACE_WARNING("%s: unknown status recevied :%d", __func__, resp);
		return Status::FAILURE;
		break;
		}
		}

		static void btif_a2dp_get_codec_configuration(
		CodecConfiguration* p_codec_info) {
		LOG_INFO("%s", __func__);
		tBT_A2DP_OFFLOAD a2dp_offload;
		A2dpCodecConfig* a2dpCodecConfig = bta_av_get_a2dp_current_codec();
		a2dpCodecConfig->getCodecSpecificConfig(&a2dp_offload);
		btav_a2dp_codec_config_t codec_config;
		codec_config = a2dpCodecConfig->getCodecConfig();
		a2dp_offload_audio_stats.SetCodecIndex(a2dpCodecConfig->codecIndex());
		switch (codec_config.codec_type) {
		case BTAV_A2DP_CODEC_INDEX_SOURCE_SBC:
		p_codec_info->codecType =
		(::android::hardware::bluetooth::a2dp::V1_0::CodecType)
		BTA_AV_CODEC_TYPE_SBC;
		p_codec_info->codecSpecific.sbcData.codecParameters =
		a2dp_offload.codec_info[0];
		LOG_INFO(" %s: codec parameters =%d", __func__,
		a2dp_offload.codec_info[0]);
		p_codec_info->codecSpecific.sbcData.minBitpool =
		a2dp_offload.codec_info[1];
		p_codec_info->codecSpecific.sbcData.maxBitpool =
		a2dp_offload.codec_info[2];
		break;
		case BTAV_A2DP_CODEC_INDEX_SOURCE_AAC:
		p_codec_info->codecType =
		(::android::hardware::bluetooth::a2dp::V1_0::CodecType)
		BTA_AV_CODEC_TYPE_AAC;
		break;
		case BTAV_A2DP_CODEC_INDEX_SOURCE_APTX:
		p_codec_info->codecType =
		(::android::hardware::bluetooth::a2dp::V1_0::CodecType)
		BTA_AV_CODEC_TYPE_APTX;
		break;
		case BTAV_A2DP_CODEC_INDEX_SOURCE_APTX_HD:
		p_codec_info->codecType =
		(::android::hardware::bluetooth::a2dp::V1_0::CodecType)
		BTA_AV_CODEC_TYPE_APTXHD;
		break;
		case BTAV_A2DP_CODEC_INDEX_SOURCE_LDAC:
		p_codec_info->codecType =
		(::android::hardware::bluetooth::a2dp::V1_0::CodecType)
		BTA_AV_CODEC_TYPE_LDAC;
		p_codec_info->codecSpecific.ldacData.bitrateIndex =
		a2dp_offload.codec_info[6];
		break;
		default:
		APPL_TRACE_ERROR("%s: Unknown Codec type :%d ", __func__,
		codec_config.codec_type);
		}

		// Obtain the MTU
		RawAddress peer_addr = btif_av_source_active_peer();
		tA2DP_ENCODER_INIT_PEER_PARAMS peer_param;
		bta_av_co_get_peer_params(peer_addr, &peer_param);
		int effectiveMtu = a2dpCodecConfig->getEffectiveMtu();
		if (effectiveMtu > 0 && effectiveMtu < peer_param.peer_mtu) {
		p_codec_info->peerMtu = effectiveMtu;
		} else {
		p_codec_info->peerMtu = peer_param.peer_mtu;
		}
		LOG_INFO("%s: peer MTU: %d effective MTU: %d result MTU: %d", __func__,
		peer_param.peer_mtu, effectiveMtu, p_codec_info->peerMtu);

		p_codec_info->sampleRate =
		(::android::hardware::bluetooth::a2dp::V1_0::SampleRate)
		codec_config.sample_rate;
		p_codec_info->bitsPerSample =
		(::android::hardware::bluetooth::a2dp::V1_0::BitsPerSample)
		codec_config.bits_per_sample;
		p_codec_info->channelMode =
		(::android::hardware::bluetooth::a2dp::V1_0::ChannelMode)
		codec_config.channel_mode;
		p_codec_info->encodedAudioBitrate = a2dpCodecConfig->getTrackBitRate();
		}

		static void btif_a2dp_audio_interface_init() {
		LOG_INFO("%s", __func__);

		btAudio = IBluetoothAudioOffload::getService();
		CHECK(btAudio != nullptr);

		auto death_link = btAudio->linkToDeath(bluetoothAudioDeathRecipient, 0);
		if (!death_link.isOk()) {
		LOG_ERROR("%s: Cannot observe the Bluetooth Audio HAL's death", __func__);
		}

		LOG_INFO("%s: IBluetoothAudioOffload::getService() returned %p (%s)",
		__func__, btAudio.get(), (btAudio->isRemote() ? "remote" : "local"));

		LOG_INFO("%s:Init returned", __func__);
		}

		static void btif_a2dp_audio_interface_deinit() {
		LOG_INFO("%s: start", __func__);
		if (btAudio != nullptr) {
		auto death_unlink = btAudio->unlinkToDeath(bluetoothAudioDeathRecipient);
		if (!death_unlink.isOk()) {
		LOG_ERROR("%s: Error unlinking death observer from Bluetooth Audio HAL",
		__func__);
		}
		}
		btAudio = nullptr;
		}

		void btif_a2dp_audio_interface_start_session() {
		LOG_INFO("%s", __func__);
		BluetoothMetricsLogger::GetInstance()->LogBluetoothSessionStart(
		bluetooth::common::CONNECTION_TECHNOLOGY_TYPE_BREDR, 0);
		a2dp_offload_audio_stats.Reset();
		btif_a2dp_audio_interface_init();
		CHECK(btAudio != nullptr);
		CodecConfiguration codec_info;
		btif_a2dp_get_codec_configuration(&codec_info);
		android::sp<IBluetoothAudioHost> host_if = new BluetoothAudioHost();
		btAudio->startSession(host_if, codec_info);
		}

		void btif_a2dp_audio_interface_end_session() {
		LOG_INFO("%s", __func__);
		a2dp_offload_audio_stats.LogAudioStopMetricsAndReset();
		BluetoothMetricsLogger::GetInstance()->LogBluetoothSessionEnd(
		bluetooth::common::DISCONNECT_REASON_UNKNOWN, 0);
		a2dp_offload_audio_stats.Reset();
		if (btAudio == nullptr) return;
		auto ret = btAudio->endSession();
		if (!ret.isOk()) {
		LOG_ERROR("HAL server is dead");
		}
		btif_a2dp_audio_interface_deinit();
		}

		// Conditionally restart the session only if it was started before
		static void btif_a2dp_audio_interface_restart_session() {
		LOG_INFO("%s", __func__);
		if (btAudio == nullptr) {
		LOG_INFO("%s: nothing to restart - session was not started", __func__);
		return;
		}
		btAudio = nullptr;
		btif_a2dp_audio_interface_start_session();
		}

		void btif_a2dp_audio_on_started(tBTA_AV_STATUS status) {
		LOG_INFO("%s: status = %d", __func__, status);
		if (btAudio != nullptr) {
		if (a2dp_cmd_pending == A2DP_CTRL_CMD_START) {
		if (status != A2DP_CTRL_ACK_PENDING) {
		a2dp_cmd_pending = A2DP_CTRL_CMD_NONE;
		}
		LOG_INFO("%s: calling method onStarted", __func__);
		auto hal_status = mapToStatus(status);
		btAudio->streamStarted(hal_status);
		if (hal_status == Status::SUCCESS) {
		a2dp_offload_audio_stats.LogAudioStart();
		}
		}
		}
		}

		void btif_a2dp_audio_on_suspended(tBTA_AV_STATUS status) {
		LOG_INFO("%s: status = %d", __func__, status);
		if (btAudio != nullptr) {
		if (a2dp_cmd_pending == A2DP_CTRL_CMD_SUSPEND) {
		if (status != A2DP_CTRL_ACK_PENDING) {
		a2dp_cmd_pending = A2DP_CTRL_CMD_NONE;
		}
		LOG_INFO("calling method onSuspended");
		auto hal_status = mapToStatus(status);
		btAudio->streamSuspended(hal_status);
		if (hal_status == Status::SUCCESS) {
		a2dp_offload_audio_stats.LogAudioStopMetricsAndReset();
		}
		}
		}
		}

		void btif_a2dp_audio_on_stopped(tBTA_AV_STATUS status) {
		LOG_INFO("%s: status = %d", __func__, status);
		if (btAudio != nullptr && a2dp_cmd_pending == A2DP_CTRL_CMD_START) {
		a2dp_cmd_pending = A2DP_CTRL_CMD_NONE;
		LOG_INFO("%s: Remote disconnected when start under progress", __func__);
		btAudio->streamStarted(mapToStatus(A2DP_CTRL_ACK_DISCONNECT_IN_PROGRESS));
		a2dp_offload_audio_stats.LogAudioStopMetricsAndReset();
		}
		}
		void btif_a2dp_audio_send_start_req() {
		LOG_INFO("%s", __func__);
		uint8_t resp;
		resp = btif_a2dp_audio_process_request(A2DP_CTRL_CMD_START);
		if (btAudio != nullptr) {
		auto status = mapToStatus(resp);
		auto ret = btAudio->streamStarted(status);
		if (status == Status::SUCCESS) {
		a2dp_offload_audio_stats.LogAudioStart();
		}
		if (!ret.isOk()) LOG_ERROR("HAL server died");
		}
		}
		void btif_a2dp_audio_send_suspend_req() {
		LOG_INFO("%s", __func__);
		uint8_t resp;
		resp = btif_a2dp_audio_process_request(A2DP_CTRL_CMD_SUSPEND);
		if (btAudio != nullptr) {
		auto status = mapToStatus(resp);
		auto ret = btAudio->streamSuspended(status);
		if (status == Status::SUCCESS) {
		a2dp_offload_audio_stats.LogAudioStopMetricsAndReset();
		}
		if (!ret.isOk()) LOG_ERROR("HAL server died");
		}
		}

		void btif_a2dp_audio_send_stop_req() {
		LOG_INFO("%s", __func__);
		btif_a2dp_audio_process_request(A2DP_CTRL_CMD_STOP);
		a2dp_offload_audio_stats.LogAudioStopMetricsAndReset();
		}

		/*void btif_a2dp_audio_send_sink_latency()
		{
		LOG_INFO("%s", __func__);
		uint16_t sink_latency = btif_av_get_sink_latency();
		if (btAudio != nullptr) {
		auto ret = btAudio->a2dp_on_get_sink_latency(sink_latency);
		if (!ret.isOk()) LOG_ERROR("server died");
		}
		}*/

		uint8_t btif_a2dp_audio_process_request(uint8_t cmd) {
		LOG_INFO("%s: cmd: %s", __func__,
		audio_a2dp_hw_dump_ctrl_event((tA2DP_CTRL_CMD)cmd));
		uint8_t status;
		switch (cmd) {
		case A2DP_CTRL_CMD_START:
		/*
		* Don't send START request to stack while we are in a call.
		* Some headsets such as "Sony MW600", don't allow AVDTP START
		* while in a call, and respond with BAD_STATE.
		*/
		if (!bluetooth::headset::IsCallIdle()) {
		APPL_TRACE_WARNING("%s: A2DP command %s failed as call state is busy",
		__func__,
		audio_a2dp_hw_dump_ctrl_event((tA2DP_CTRL_CMD)cmd));
		status = A2DP_CTRL_ACK_INCALL_FAILURE;
		break;
		}
		if (btif_av_stream_started_ready()) {
		/*
		* Already started, setup audio data channel listener and ACK
		* back immediately.
		*/
		status = A2DP_CTRL_ACK_SUCCESS;
		break;
		}
		if (btif_av_stream_ready()) {
		/*
		* Post start event and wait for audio path to open.
		* If we are the source, the ACK will be sent after the start
		* procedure is completed, othewise send it now.
		*/
		btif_av_stream_start();
		if (btif_av_get_peer_sep() == AVDT_TSEP_SRC) {
		status = A2DP_CTRL_ACK_SUCCESS;
		break;
		}
		/Return pending and ack when start stream cfm received from remote/
		status = A2DP_CTRL_ACK_PENDING;
		break;
		}

		APPL_TRACE_WARNING("%s: A2DP command %s while AV stream is not ready",
		__func__,
		audio_a2dp_hw_dump_ctrl_event((tA2DP_CTRL_CMD)cmd));
		status = A2DP_CTRL_ACK_FAILURE;
		break;

		case A2DP_CTRL_CMD_STOP:
		if (btif_av_get_peer_sep() == AVDT_TSEP_SNK &&
		!btif_a2dp_source_is_streaming()) {
		/* We are already stopped, just ack back */
		status = A2DP_CTRL_ACK_SUCCESS;
		break;
		}
		btif_av_stream_stop(RawAddress::kEmpty);
		status = A2DP_CTRL_ACK_SUCCESS;
		break;

		case A2DP_CTRL_CMD_SUSPEND:
		/* Local suspend */
		if (btif_av_stream_started_ready()) {
		btif_av_stream_suspend();
		status = A2DP_CTRL_ACK_PENDING;
		break;
		}
		/* If we are not in started state, just ack back ok and let
		* audioflinger close the channel. This can happen if we are
		* remotely suspended, clear REMOTE SUSPEND flag.
		*/
		btif_av_clear_remote_suspend_flag();
		status = A2DP_CTRL_ACK_SUCCESS;
		break;

		default:
		APPL_TRACE_ERROR("UNSUPPORTED CMD (%d)", cmd);
		status = A2DP_CTRL_ACK_FAILURE;
		break;
		}
		LOG_INFO("a2dp-ctrl-cmd : %s DONE returning status %d",
		audio_a2dp_hw_dump_ctrl_event((tA2DP_CTRL_CMD)cmd), status);
		if (status == A2DP_CTRL_ACK_PENDING) {
		a2dp_cmd_pending = cmd;
		} else {
		a2dp_cmd_pending = A2DP_CTRL_CMD_NONE;
		}
		return status;
		}