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// Copyright 2015 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 COMPONENTS_AUDIO_MODEM_AUDIO_PLAYER_IMPL_H_
#define COMPONENTS_AUDIO_MODEM_AUDIO_PLAYER_IMPL_H_
#include <vector>
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/synchronization/lock.h"
#include "components/audio_modem/audio_player.h"
#include "media/audio/audio_io.h"
namespace media {
class AudioBus;
class AudioBusRefCounted;
}
namespace audio_modem {
// The AudioPlayerImpl class will play a set of samples till it is told to stop.
class AudioPlayerImpl final
: public AudioPlayer,
public media::AudioOutputStream::AudioSourceCallback {
public:
AudioPlayerImpl();
// AudioPlayer overrides:
void Initialize() override;
void Play(const scoped_refptr<media::AudioBusRefCounted>& samples) override;
void Stop() override;
void Finalize() override;
// Takes ownership of the stream.
void set_output_stream_for_testing(
media::AudioOutputStream* output_stream_for_testing) {
output_stream_for_testing_.reset(output_stream_for_testing);
}
private:
friend class AudioPlayerTest;
FRIEND_TEST_ALL_PREFIXES(AudioPlayerTest, BasicPlayAndStop);
FRIEND_TEST_ALL_PREFIXES(AudioPlayerTest, OutOfOrderPlayAndStopMultiple);
~AudioPlayerImpl() override;
// Methods to do our various operations; all of these need to be run on the
// audio thread.
void InitializeOnAudioThread();
void PlayOnAudioThread(
const scoped_refptr<media::AudioBusRefCounted>& samples);
void StopOnAudioThread();
void StopAndCloseOnAudioThread();
void FinalizeOnAudioThread();
// AudioOutputStream::AudioSourceCallback overrides:
// Following methods could be called from *ANY* thread.
int OnMoreData(media::AudioBus* dest, uint32 total_bytes_delay) override;
void OnError(media::AudioOutputStream* stream) override;
// Flushes the audio loop, making sure that any queued operations are
// performed.
void FlushAudioLoopForTesting();
bool is_playing_;
// Self-deleting object.
media::AudioOutputStream* stream_;
scoped_ptr<media::AudioOutputStream> output_stream_for_testing_;
// All fields below here are protected by this lock.
base::Lock state_lock_;
scoped_refptr<media::AudioBusRefCounted> samples_;
// Index to the frame in the samples that we need to play next.
int frame_index_;
DISALLOW_COPY_AND_ASSIGN(AudioPlayerImpl);
};
} // namespace audio_modem
#endif // COMPONENTS_AUDIO_MODEM_AUDIO_PLAYER_IMPL_H_
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