blob: 8ee2bb11032029ce5e16ed7875c446b26e8ec93f [file] [log] [blame]
/*
* Copyright 2019 The Android Open Source Project
*
* 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.
*/
#pragma once
#include <time.h>
#include <mutex>
#include <android/hardware/bluetooth/audio/2.0/IBluetoothAudioProvider.h>
#include <android/hardware/bluetooth/audio/2.0/types.h>
#include <fmq/MessageQueue.h>
#include <hardware/audio.h>
#include "common/message_loop_thread.h"
#define BLUETOOTH_AUDIO_HAL_PROP_DISABLED "persist.bluetooth.bluetooth_audio_hal.disabled"
namespace bluetooth {
namespace audio {
using ::android::hardware::bluetooth::audio::V2_0::AudioCapabilities;
using ::android::hardware::bluetooth::audio::V2_0::AudioConfiguration;
using ::android::hardware::bluetooth::audio::V2_0::BitsPerSample;
using ::android::hardware::bluetooth::audio::V2_0::ChannelMode;
using ::android::hardware::bluetooth::audio::V2_0::CodecConfiguration;
using ::android::hardware::bluetooth::audio::V2_0::CodecType;
using ::android::hardware::bluetooth::audio::V2_0::IBluetoothAudioProvider;
using ::android::hardware::bluetooth::audio::V2_0::PcmParameters;
using ::android::hardware::bluetooth::audio::V2_0::SampleRate;
using ::android::hardware::bluetooth::audio::V2_0::SessionType;
using ::android::hardware::bluetooth::audio::V2_0::TimeSpec;
using BluetoothAudioStatus =
::android::hardware::bluetooth::audio::V2_0::Status;
enum class BluetoothAudioCtrlAck : uint8_t {
SUCCESS_FINISHED = 0,
PENDING,
FAILURE_UNSUPPORTED,
FAILURE_BUSY,
FAILURE_DISCONNECTING,
FAILURE
};
std::ostream& operator<<(std::ostream& os, const BluetoothAudioCtrlAck& ack);
inline BluetoothAudioStatus BluetoothAudioCtrlAckToHalStatus(
const BluetoothAudioCtrlAck& ack) {
switch (ack) {
case BluetoothAudioCtrlAck::SUCCESS_FINISHED:
return BluetoothAudioStatus::SUCCESS;
case BluetoothAudioCtrlAck::FAILURE_UNSUPPORTED:
return BluetoothAudioStatus::UNSUPPORTED_CODEC_CONFIGURATION;
case BluetoothAudioCtrlAck::PENDING:
return BluetoothAudioStatus::FAILURE;
case BluetoothAudioCtrlAck::FAILURE_BUSY:
return BluetoothAudioStatus::FAILURE;
case BluetoothAudioCtrlAck::FAILURE_DISCONNECTING:
return BluetoothAudioStatus::FAILURE;
default:
return BluetoothAudioStatus::FAILURE;
}
}
// An IBluetoothTransportInstance needs to be implemented by a Bluetooth audio
// transport, such as A2DP or Hearing Aid, to handle callbacks from Audio HAL.
class IBluetoothTransportInstance {
public:
IBluetoothTransportInstance(SessionType sessionType,
AudioConfiguration audioConfig)
: session_type_(sessionType), audio_config_(std::move(audioConfig)){};
virtual ~IBluetoothTransportInstance() = default;
SessionType GetSessionType() const { return session_type_; }
AudioConfiguration GetAudioConfiguration() const { return audio_config_; }
void UpdateAudioConfiguration(const AudioConfiguration& audio_config) {
audio_config_ = audio_config;
}
virtual BluetoothAudioCtrlAck StartRequest() = 0;
virtual BluetoothAudioCtrlAck SuspendRequest() = 0;
virtual void StopRequest() = 0;
virtual bool GetPresentationPosition(uint64_t* remote_delay_report_ns,
uint64_t* total_bytes_readed,
timespec* data_position) = 0;
virtual void MetadataChanged(const source_metadata_t& source_metadata) = 0;
// Invoked when the transport is requested to reset presentation position
virtual void ResetPresentationPosition() = 0;
// Invoked when the transport is requested to log bytes read
virtual void LogBytesRead(size_t bytes_readed) = 0;
private:
const SessionType session_type_;
AudioConfiguration audio_config_;
};
// common object is shared between different kind of SessionType
class BluetoothAudioDeathRecipient;
// The client interface connects an IBluetoothTransportInstance to
// IBluetoothAudioProvider and helps to route callbacks to
// IBluetoothTransportInstance
class BluetoothAudioClientInterface {
public:
// Constructs an BluetoothAudioClientInterface to communicate to
// BluetoothAudio HAL. |sink| is the implementation for the transport, and
// |message_loop| is the thread where callbacks are invoked.
BluetoothAudioClientInterface(
IBluetoothTransportInstance* sink,
bluetooth::common::MessageLoopThread* message_loop);
~BluetoothAudioClientInterface();
bool IsValid() const {
return provider_ != nullptr;
}
std::vector<AudioCapabilities> GetAudioCapabilities() const;
bool UpdateAudioConfig(const AudioConfiguration& audioConfig);
int StartSession();
void StreamStarted(const BluetoothAudioCtrlAck& ack);
void StreamSuspended(const BluetoothAudioCtrlAck& ack);
int EndSession();
// Read data from audio HAL through fmq
size_t ReadAudioData(uint8_t* p_buf, uint32_t len);
// Write data to audio HAL through fmq
size_t WriteAudioData(uint8_t* p_buf, uint32_t len);
// Renew the connection and usually is used when HIDL restarted
void RenewAudioProviderAndSession();
static constexpr PcmParameters kInvalidPcmConfiguration = {
.sampleRate = SampleRate::RATE_UNKNOWN,
.channelMode = ChannelMode::UNKNOWN,
.bitsPerSample = BitsPerSample::BITS_UNKNOWN,
};
private:
// Helper function to connect to an IBluetoothAudioProvider
void fetch_audio_provider();
mutable std::mutex internal_mutex_;
IBluetoothTransportInstance* sink_;
android::sp<IBluetoothAudioProvider> provider_;
std::vector<AudioCapabilities> capabilities_;
bool session_started_;
std::unique_ptr<::android::hardware::MessageQueue<
uint8_t, ::android::hardware::kSynchronizedReadWrite>>
mDataMQ;
android::sp<BluetoothAudioDeathRecipient> death_recipient_;
};
} // namespace audio
} // namespace bluetooth