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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_AUDIO_AUDIO_INPUT_STREAM_DATA_INTERCEPTOR_H_
#define MEDIA_AUDIO_AUDIO_INPUT_STREAM_DATA_INTERCEPTOR_H_
#include <memory>
#include "base/callback.h"
#include "base/macros.h"
#include "base/sequence_checker.h"
#include "media/audio/audio_io.h"
#include "media/base/media_export.h"
namespace media {
class AudioDebugRecorder;
// This class wraps an AudioInputStream to be able to intercept the data for
// debug recording purposes.
class MEDIA_EXPORT AudioInputStreamDataInterceptor
: public AudioInputStream,
public AudioInputStream::AudioInputCallback {
public:
using CreateDebugRecorderCB =
base::RepeatingCallback<std::unique_ptr<AudioDebugRecorder>()>;
// |stream| is the stream that this object should forward all stream
// operations to. It will intercept OnData callbacks and send the audio data
// to the debug recorder created by |create_debug_recorder_cb|.
AudioInputStreamDataInterceptor(
CreateDebugRecorderCB create_debug_recorder_cb,
AudioInputStream* stream);
~AudioInputStreamDataInterceptor() override;
// Implementation of AudioInputStream.
bool Open() override;
void Start(AudioInputStream::AudioInputCallback* callback) override;
void Stop() override;
void Close() override;
double GetMaxVolume() override;
void SetVolume(double volume) override;
double GetVolume() override;
bool IsMuted() override;
bool SetAutomaticGainControl(bool enabled) override;
bool GetAutomaticGainControl() override;
void SetOutputDeviceForAec(const std::string& output_device_id) override;
// Implementation of AudioInputCallback
void OnData(const AudioBus* source,
base::TimeTicks capture_time,
double volume) override;
void OnError() override;
private:
const CreateDebugRecorderCB create_debug_recorder_cb_;
std::unique_ptr<AudioDebugRecorder> debug_recorder_;
AudioInputStream* const stream_;
AudioInputStream::AudioInputCallback* callback_;
SEQUENCE_CHECKER(sequence_checker_);
DISALLOW_COPY_AND_ASSIGN(AudioInputStreamDataInterceptor);
};
} // namespace media
#endif // MEDIA_AUDIO_AUDIO_INPUT_STREAM_DATA_INTERCEPTOR_H_
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