blob: ad217d188d78b3274659afa6500344160d49e4d9 [file] [log] [blame]
// Copyright 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.
#include <cstdint>
#include <list>
#include <memory>
#include "base/macros.h"
#include "base/synchronization/lock.h"
#include "remoting/proto/audio.pb.h"
#include "remoting/protocol/audio_stub.h"
namespace remoting {
// TODO(nicholss): Update legacy audio player to use new audio buffer code.
class AudioPlayer : public protocol::AudioStub {
// The number of channels in the audio stream (only supporting stereo audio
// for now).
static const int kChannels = 2;
static const int kSampleSizeBytes = 2;
~AudioPlayer() override;
// protocol::AudioStub implementation.
void ProcessAudioPacket(std::unique_ptr<AudioPacket> packet,
base::OnceClosure done) override;
// 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);
// Function called by the subclass when it needs more audio samples to fill
// its buffer. Will fill the buffer with 0's if no sample is available.
void FillWithSamples(void* samples, uint32_t buffer_size);
friend class AudioPlayerTest;
typedef std::list<std::unique_ptr<AudioPacket>> AudioPacketQueue;
void ResetQueue();
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_;
} // namespace remoting