/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "BTAudioHalDeviceProxy"
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#include <android-base/logging.h>
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#include <android-base/stringprintf.h>
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#include <audio_utils/primitives.h>
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#include <inttypes.h>
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#include <log/log.h>
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#include <stdlib.h>
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#include "BluetoothAudioSessionControl.h"
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#include "device_port_proxy.h"
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#include "stream_apis.h"
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#include "utils.h"
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namespace android {
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namespace bluetooth {
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namespace audio {
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using ::android::base::StringPrintf;
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using ::android::bluetooth::audio::BluetoothAudioSessionControl;
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using ::android::hardware::bluetooth::audio::V2_0::BitsPerSample;
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using ::android::hardware::bluetooth::audio::V2_0::ChannelMode;
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using ::android::hardware::bluetooth::audio::V2_0::PcmParameters;
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using ::android::hardware::bluetooth::audio::V2_0::SampleRate;
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using ::android::hardware::bluetooth::audio::V2_0::SessionType;
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using BluetoothAudioStatus =
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::android::hardware::bluetooth::audio::V2_0::Status;
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using ControlResultCallback = std::function<void(
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uint16_t cookie, bool start_resp, const BluetoothAudioStatus& status)>;
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using SessionChangedCallback = std::function<void(uint16_t cookie)>;
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namespace {
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unsigned int SampleRateToAudioFormat(SampleRate sample_rate) {
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switch (sample_rate) {
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case SampleRate::RATE_16000:
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return 16000;
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case SampleRate::RATE_24000:
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return 24000;
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case SampleRate::RATE_44100:
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return 44100;
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case SampleRate::RATE_48000:
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return 48000;
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case SampleRate::RATE_88200:
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return 88200;
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case SampleRate::RATE_96000:
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return 96000;
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case SampleRate::RATE_176400:
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return 176400;
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case SampleRate::RATE_192000:
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return 192000;
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default:
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return kBluetoothDefaultSampleRate;
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}
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}
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audio_channel_mask_t ChannelModeToAudioFormat(ChannelMode channel_mode) {
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switch (channel_mode) {
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case ChannelMode::MONO:
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return AUDIO_CHANNEL_OUT_MONO;
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case ChannelMode::STEREO:
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return AUDIO_CHANNEL_OUT_STEREO;
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default:
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return kBluetoothDefaultOutputChannelModeMask;
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}
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}
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audio_format_t BitsPerSampleToAudioFormat(BitsPerSample bits_per_sample) {
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switch (bits_per_sample) {
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case BitsPerSample::BITS_16:
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return AUDIO_FORMAT_PCM_16_BIT;
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case BitsPerSample::BITS_24:
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return AUDIO_FORMAT_PCM_24_BIT_PACKED;
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case BitsPerSample::BITS_32:
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return AUDIO_FORMAT_PCM_32_BIT;
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default:
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return kBluetoothDefaultAudioFormatBitsPerSample;
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}
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}
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// The maximum time to wait in std::condition_variable::wait_for()
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constexpr unsigned int kMaxWaitingTimeMs = 4500;
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} // namespace
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BluetoothAudioPortOut::BluetoothAudioPortOut()
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: state_(BluetoothStreamState::DISABLED),
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session_type_(SessionType::UNKNOWN),
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cookie_(android::bluetooth::audio::kObserversCookieUndefined) {}
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bool BluetoothAudioPortOut::SetUp(audio_devices_t devices) {
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if (!init_session_type(devices)) return false;
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state_ = BluetoothStreamState::STANDBY;
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auto control_result_cb = [port = this](uint16_t cookie, bool start_resp,
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const BluetoothAudioStatus& status) {
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if (!port->in_use()) {
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LOG(ERROR) << "control_result_cb: BluetoothAudioPortOut is not in use";
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return;
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}
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if (port->cookie_ != cookie) {
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LOG(ERROR) << "control_result_cb: proxy of device port (cookie=" << StringPrintf("%#hx", cookie)
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<< ") is corrupted";
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return;
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}
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port->ControlResultHandler(status);
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};
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auto session_changed_cb = [port = this](uint16_t cookie) {
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if (!port->in_use()) {
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LOG(ERROR) << "session_changed_cb: BluetoothAudioPortOut is not in use";
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return;
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}
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if (port->cookie_ != cookie) {
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LOG(ERROR) << "session_changed_cb: proxy of device port (cookie=" << StringPrintf("%#hx", cookie)
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<< ") is corrupted";
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return;
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}
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port->SessionChangedHandler();
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};
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::android::bluetooth::audio::PortStatusCallbacks cbacks = {
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.control_result_cb_ = control_result_cb,
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.session_changed_cb_ = session_changed_cb};
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cookie_ = BluetoothAudioSessionControl::RegisterControlResultCback(
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session_type_, cbacks);
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LOG(INFO) << __func__ << ": session_type=" << toString(session_type_) << ", cookie=" << StringPrintf("%#hx", cookie_);
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return (cookie_ != android::bluetooth::audio::kObserversCookieUndefined);
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}
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bool BluetoothAudioPortOut::init_session_type(audio_devices_t device) {
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switch (device) {
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case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
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case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
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case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
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LOG(VERBOSE) << __func__ << ": device=AUDIO_DEVICE_OUT_BLUETOOTH_A2DP (HEADPHONES/SPEAKER) ("
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<< StringPrintf("%#x", device) << ")";
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session_type_ = SessionType::A2DP_SOFTWARE_ENCODING_DATAPATH;
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break;
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case AUDIO_DEVICE_OUT_HEARING_AID:
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LOG(VERBOSE) << __func__ << ": device=AUDIO_DEVICE_OUT_HEARING_AID (MEDIA/VOICE) (" << StringPrintf("%#x", device)
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<< ")";
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session_type_ = SessionType::HEARING_AID_SOFTWARE_ENCODING_DATAPATH;
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break;
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default:
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LOG(ERROR) << __func__ << ": unknown device=" << StringPrintf("%#x", device);
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return false;
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}
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if (!BluetoothAudioSessionControl::IsSessionReady(session_type_)) {
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LOG(ERROR) << __func__ << ": device=" << StringPrintf("%#x", device) << ", session_type=" << toString(session_type_)
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<< " is not ready";
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return false;
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}
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return true;
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}
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void BluetoothAudioPortOut::TearDown() {
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if (!in_use()) {
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LOG(ERROR) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << " unknown monitor";
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return;
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}
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LOG(INFO) << __func__ << ": session_type=" << toString(session_type_) << ", cookie=" << StringPrintf("%#hx", cookie_);
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BluetoothAudioSessionControl::UnregisterControlResultCback(session_type_,
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cookie_);
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cookie_ = android::bluetooth::audio::kObserversCookieUndefined;
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}
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void BluetoothAudioPortOut::ControlResultHandler(
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const BluetoothAudioStatus& status) {
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if (!in_use()) {
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LOG(ERROR) << __func__ << ": BluetoothAudioPortOut is not in use";
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return;
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}
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std::unique_lock<std::mutex> port_lock(cv_mutex_);
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BluetoothStreamState previous_state = state_;
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LOG(INFO) << "control_result_cb: session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", previous_state=" << previous_state
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<< ", status=" << toString(status);
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switch (previous_state) {
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case BluetoothStreamState::STARTING:
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if (status == BluetoothAudioStatus::SUCCESS) {
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state_ = BluetoothStreamState::STARTED;
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} else {
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// Set to standby since the stack may be busy switching between outputs
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LOG(WARNING) << "control_result_cb: status=" << toString(status)
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<< " failure for session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", previous_state=" << previous_state;
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state_ = BluetoothStreamState::STANDBY;
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}
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break;
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case BluetoothStreamState::SUSPENDING:
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if (status == BluetoothAudioStatus::SUCCESS) {
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state_ = BluetoothStreamState::STANDBY;
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} else {
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// It will be failed if the headset is disconnecting, and set to disable
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// to wait for re-init again
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LOG(WARNING) << "control_result_cb: status=" << toString(status)
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<< " failure for session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", previous_state=" << previous_state;
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state_ = BluetoothStreamState::DISABLED;
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}
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break;
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default:
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LOG(ERROR) << "control_result_cb: unexpected status=" << toString(status)
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<< " for session_type=" << toString(session_type_) << ", cookie=" << StringPrintf("%#hx", cookie_)
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<< ", previous_state=" << previous_state;
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return;
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}
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port_lock.unlock();
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internal_cv_.notify_all();
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}
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void BluetoothAudioPortOut::SessionChangedHandler() {
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if (!in_use()) {
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LOG(ERROR) << __func__ << ": BluetoothAudioPortOut is not in use";
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return;
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}
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std::unique_lock<std::mutex> port_lock(cv_mutex_);
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BluetoothStreamState previous_state = state_;
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LOG(INFO) << "session_changed_cb: session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", previous_state=" << previous_state;
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if (previous_state != BluetoothStreamState::DISABLED) {
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state_ = BluetoothStreamState::DISABLED;
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} else {
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state_ = BluetoothStreamState::STANDBY;
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}
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port_lock.unlock();
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internal_cv_.notify_all();
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}
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bool BluetoothAudioPortOut::in_use() const {
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return (cookie_ != android::bluetooth::audio::kObserversCookieUndefined);
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}
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bool BluetoothAudioPortOut::LoadAudioConfig(audio_config_t* audio_cfg) const {
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if (!in_use()) {
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LOG(ERROR) << __func__ << ": BluetoothAudioPortOut is not in use";
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audio_cfg->sample_rate = kBluetoothDefaultSampleRate;
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audio_cfg->channel_mask = kBluetoothDefaultOutputChannelModeMask;
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audio_cfg->format = kBluetoothDefaultAudioFormatBitsPerSample;
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return false;
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}
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const AudioConfiguration& hal_audio_cfg =
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BluetoothAudioSessionControl::GetAudioConfig(session_type_);
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if (hal_audio_cfg.getDiscriminator() !=
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AudioConfiguration::hidl_discriminator::pcmConfig) {
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audio_cfg->sample_rate = kBluetoothDefaultSampleRate;
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audio_cfg->channel_mask = kBluetoothDefaultOutputChannelModeMask;
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audio_cfg->format = kBluetoothDefaultAudioFormatBitsPerSample;
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return false;
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}
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const PcmParameters& pcm_cfg = hal_audio_cfg.pcmConfig();
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LOG(VERBOSE) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", state=" << state_ << ", PcmConfig=["
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<< toString(pcm_cfg) << "]";
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if (pcm_cfg.sampleRate == SampleRate::RATE_UNKNOWN ||
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pcm_cfg.channelMode == ChannelMode::UNKNOWN ||
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pcm_cfg.bitsPerSample == BitsPerSample::BITS_UNKNOWN) {
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return false;
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}
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audio_cfg->sample_rate = SampleRateToAudioFormat(pcm_cfg.sampleRate);
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audio_cfg->channel_mask =
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(is_stereo_to_mono_ ? AUDIO_CHANNEL_OUT_STEREO : ChannelModeToAudioFormat(pcm_cfg.channelMode));
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audio_cfg->format = BitsPerSampleToAudioFormat(pcm_cfg.bitsPerSample);
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return true;
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}
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bool BluetoothAudioPortOut::CondwaitState(BluetoothStreamState state) {
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bool retval;
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std::unique_lock<std::mutex> port_lock(cv_mutex_);
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switch (state) {
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case BluetoothStreamState::STARTING:
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LOG(VERBOSE) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << " waiting for STARTED";
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retval = internal_cv_.wait_for(
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port_lock, std::chrono::milliseconds(kMaxWaitingTimeMs),
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[this] { return this->state_ != BluetoothStreamState::STARTING; });
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retval = retval && state_ == BluetoothStreamState::STARTED;
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break;
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case BluetoothStreamState::SUSPENDING:
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LOG(VERBOSE) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << " waiting for SUSPENDED";
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retval = internal_cv_.wait_for(
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port_lock, std::chrono::milliseconds(kMaxWaitingTimeMs),
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[this] { return this->state_ != BluetoothStreamState::SUSPENDING; });
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retval = retval && state_ == BluetoothStreamState::STANDBY;
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break;
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default:
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LOG(WARNING) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << " waiting for KNOWN";
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return false;
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}
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return retval; // false if any failure like timeout
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}
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bool BluetoothAudioPortOut::Start() {
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if (!in_use()) {
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LOG(ERROR) << __func__ << ": BluetoothAudioPortOut is not in use";
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return false;
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}
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LOG(INFO) << __func__ << ": session_type=" << toString(session_type_) << ", cookie=" << StringPrintf("%#hx", cookie_)
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<< ", state=" << state_ << ", mono=" << (is_stereo_to_mono_ ? "true" : "false") << " request";
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bool retval = false;
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if (state_ == BluetoothStreamState::STANDBY) {
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state_ = BluetoothStreamState::STARTING;
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if (BluetoothAudioSessionControl::StartStream(session_type_)) {
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retval = CondwaitState(BluetoothStreamState::STARTING);
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} else {
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LOG(ERROR) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", state=" << state_ << " Hal fails";
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}
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}
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if (retval) {
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LOG(INFO) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", state=" << state_
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<< ", mono=" << (is_stereo_to_mono_ ? "true" : "false") << " done";
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} else {
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LOG(ERROR) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", state=" << state_ << " failure";
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}
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return retval; // false if any failure like timeout
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}
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bool BluetoothAudioPortOut::Suspend() {
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if (!in_use()) {
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LOG(ERROR) << __func__ << ": BluetoothAudioPortOut is not in use";
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return false;
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}
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LOG(INFO) << __func__ << ": session_type=" << toString(session_type_) << ", cookie=" << StringPrintf("%#hx", cookie_)
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<< ", state=" << state_ << " request";
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bool retval = false;
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if (state_ == BluetoothStreamState::STARTED) {
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state_ = BluetoothStreamState::SUSPENDING;
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if (BluetoothAudioSessionControl::SuspendStream(session_type_)) {
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retval = CondwaitState(BluetoothStreamState::SUSPENDING);
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} else {
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LOG(ERROR) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", state=" << state_ << " Hal fails";
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}
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}
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if (retval) {
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LOG(INFO) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", state=" << state_ << " done";
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} else {
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LOG(ERROR) << __func__ << ": session_type=" << toString(session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", state=" << state_ << " failure";
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}
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return retval; // false if any failure like timeout
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}
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void BluetoothAudioPortOut::Stop() {
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if (!in_use()) {
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LOG(ERROR) << __func__ << ": BluetoothAudioPortOut is not in use";
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return;
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}
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LOG(INFO) << __func__ << ": session_type=" << toString(session_type_) << ", cookie=" << StringPrintf("%#hx", cookie_)
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<< ", state=" << state_ << " request";
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state_ = BluetoothStreamState::DISABLED;
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BluetoothAudioSessionControl::StopStream(session_type_);
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LOG(INFO) << __func__ << ": session_type=" << toString(session_type_) << ", cookie=" << StringPrintf("%#hx", cookie_)
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<< ", state=" << state_ << " done";
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}
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size_t BluetoothAudioPortOut::WriteData(const void* buffer, size_t bytes) const {
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if (!in_use()) return 0;
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if (!is_stereo_to_mono_) {
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return BluetoothAudioSessionControl::OutWritePcmData(session_type_, buffer, bytes);
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}
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// WAR to mix the stereo into Mono (16 bits per sample)
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const size_t write_frames = bytes >> 2;
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if (write_frames == 0) return 0;
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auto src = static_cast<const int16_t*>(buffer);
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std::unique_ptr<int16_t[]> dst{new int16_t[write_frames]};
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downmix_to_mono_i16_from_stereo_i16(dst.get(), src, write_frames);
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// a frame is 16 bits, and the size of a mono frame is equal to half a stereo.
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return BluetoothAudioSessionControl::OutWritePcmData(session_type_, dst.get(), write_frames * 2) * 2;
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}
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bool BluetoothAudioPortOut::GetPresentationPosition(uint64_t* delay_ns,
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uint64_t* bytes,
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timespec* timestamp) const {
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if (!in_use()) {
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LOG(ERROR) << __func__ << ": BluetoothAudioPortOut is not in use";
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return false;
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}
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bool retval = BluetoothAudioSessionControl::GetPresentationPosition(
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session_type_, delay_ns, bytes, timestamp);
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LOG(VERBOSE) << __func__ << ": session_type=" << StringPrintf("%#hhx", session_type_)
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<< ", cookie=" << StringPrintf("%#hx", cookie_) << ", state=" << state_ << ", delay=" << *delay_ns
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<< "ns, data=" << *bytes << " bytes, timestamp=" << timestamp->tv_sec << "."
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<< StringPrintf("%09ld", timestamp->tv_nsec) << "s";
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return retval;
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}
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void BluetoothAudioPortOut::UpdateMetadata(
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const source_metadata* source_metadata) const {
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if (!in_use()) {
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LOG(ERROR) << __func__ << ": BluetoothAudioPortOut is not in use";
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return;
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}
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LOG(DEBUG) << __func__ << ": session_type=" << toString(session_type_) << ", cookie=" << StringPrintf("%#hx", cookie_)
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<< ", state=" << state_ << ", " << source_metadata->track_count << " track(s)";
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if (source_metadata->track_count == 0) return;
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BluetoothAudioSessionControl::UpdateTracksMetadata(session_type_,
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source_metadata);
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}
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BluetoothStreamState BluetoothAudioPortOut::GetState() const { return state_; }
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void BluetoothAudioPortOut::SetState(BluetoothStreamState state) {
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state_ = state;
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}
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} // namespace audio
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} // namespace bluetooth
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} // namespace android
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