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/*
* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_AUDIO_DEVICE_WIN_CORE_AUDIO_OUTPUT_WIN_H_
#define MODULES_AUDIO_DEVICE_WIN_CORE_AUDIO_OUTPUT_WIN_H_
#include <memory>
#include <string>
#include "modules/audio_device/win/audio_device_module_win.h"
#include "modules/audio_device/win/core_audio_base_win.h"
namespace webrtc {
class AudioDeviceBuffer;
class FineAudioBuffer;
namespace webrtc_win {
// Windows specific AudioOutput implementation using a CoreAudioBase class where
// an output direction is set at construction. Supports render device handling
// and streaming of decoded audio from a WebRTC client to the native audio
// layer.
class CoreAudioOutput final : public CoreAudioBase, public AudioOutput {
public:
CoreAudioOutput(bool automatic_restart);
~CoreAudioOutput() override;
// AudioOutput implementation.
int Init() override;
int Terminate() override;
int NumDevices() const override;
int SetDevice(int index) override;
int SetDevice(AudioDeviceModule::WindowsDeviceType device) override;
int DeviceName(int index, std::string* name, std::string* guid) override;
void AttachAudioBuffer(AudioDeviceBuffer* audio_buffer) override;
bool PlayoutIsInitialized() const override;
int InitPlayout() override;
int StartPlayout() override;
int StopPlayout() override;
bool Playing() override;
int VolumeIsAvailable(bool* available) override;
int RestartPlayout() override;
bool Restarting() const override;
int SetSampleRate(uint32_t sample_rate) override;
CoreAudioOutput(const CoreAudioOutput&) = delete;
CoreAudioOutput& operator=(const CoreAudioOutput&) = delete;
private:
void ReleaseCOMObjects();
bool OnDataCallback(uint64_t device_frequency);
bool OnErrorCallback(ErrorType error);
int EstimateOutputLatencyMillis(uint64_t device_frequency);
bool HandleStreamDisconnected();
std::unique_ptr<FineAudioBuffer> fine_audio_buffer_;
Microsoft::WRL::ComPtr<IAudioRenderClient> audio_render_client_;
uint64_t num_frames_written_ = 0;
};
} // namespace webrtc_win
} // namespace webrtc
#endif // MODULES_AUDIO_DEVICE_WIN_CORE_AUDIO_OUTPUT_WIN_H_
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