system/audio_hal_interface/aidl/a2dp_transport.h

/*
 * Copyright 2022 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 "client_interface_aidl.h"

namespace bluetooth {
namespace audio {
namespace aidl {
namespace a2dp {

namespace {

BluetoothAudioCtrlAck a2dp_ack_to_bt_audio_ctrl_ack(tA2DP_CTRL_ACK ack);

// Provide call-in APIs for the Bluetooth Audio HAL
class A2dpTransport
    : public ::bluetooth::audio::aidl::IBluetoothSinkTransportInstance {
 public:
  A2dpTransport(SessionType sessionType);

  BluetoothAudioCtrlAck StartRequest(bool is_low_latency) override;

  BluetoothAudioCtrlAck SuspendRequest() override;

  void StopRequest() override;

  void SetLowLatency(bool is_low_latency) override;

  bool GetPresentationPosition(uint64_t* remote_delay_report_ns,
                               uint64_t* total_bytes_read,
                               timespec* data_position) override;

  void SourceMetadataChanged(const source_metadata_t& source_metadata);

  void SinkMetadataChanged(const sink_metadata_t&) override;

  tA2DP_CTRL_CMD GetPendingCmd() const;

  void ResetPendingCmd();

  void ResetPresentationPosition();

  void LogBytesRead(size_t bytes_read) override;

  // delay reports from AVDTP is based on 1/10 ms (100us)
  void SetRemoteDelay(uint16_t delay_report);

 private:
  static tA2DP_CTRL_CMD a2dp_pending_cmd_;
  static uint16_t remote_delay_report_;
  uint64_t total_bytes_read_;
  timespec data_position_;
};
}  // namespace

}  // namespace a2dp
}  // namespace aidl
}  // namespace audio
}  // namespace bluetooth