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// Copyright (c) 2012 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 REMOTING_CLIENT_AUDIO_PLAYER_H_
#define REMOTING_CLIENT_AUDIO_PLAYER_H_
#include <stddef.h>
#include <stdint.h>
#include <list>
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/synchronization/lock.h"
#include "remoting/proto/audio.pb.h"
namespace remoting {
class AudioPlayer {
public:
virtual ~AudioPlayer();
void ProcessAudioPacket(scoped_ptr<AudioPacket> packet);
protected:
AudioPlayer();
// Return the recommended number of samples to include in a frame.
virtual uint32_t GetSamplesPerFrame() = 0;
// Resets the audio player and starts playback.
// Returns true on success.
virtual bool ResetAudioPlayer(AudioPacket::SamplingRate sampling_rate) = 0;
// Function called by the browser when it needs more audio samples.
static void AudioPlayerCallback(void* samples,
uint32_t buffer_size,
void* data);
private:
friend class AudioPlayerTest;
typedef std::list<AudioPacket*> AudioPacketQueue;
void ResetQueue();
void FillWithSamples(void* samples, uint32_t buffer_size);
AudioPacket::SamplingRate sampling_rate_;
bool start_failed_;
// Protects |queued_packets_|, |queued_samples_ and |bytes_consumed_|. This is
// necessary to prevent races, because Pepper will call the callback on a
// separate thread.
base::Lock lock_;
AudioPacketQueue queued_packets_;
int queued_bytes_;
// The number of bytes from |queued_packets_| that have been consumed.
size_t bytes_consumed_;
DISALLOW_COPY_AND_ASSIGN(AudioPlayer);
};
} // namespace remoting
#endif // REMOTING_CLIENT_AUDIO_PLAYER_H_
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