blob: 94da3dc86f517e1f9014f3a2f2156a032e974be4 [file] [log] [blame]
// 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_FUCHSIA_AUDIO_OUTPUT_STREAM_FUCHSIA_H_
#define MEDIA_AUDIO_FUCHSIA_AUDIO_OUTPUT_STREAM_FUCHSIA_H_
#include <media/audio.h>
#include "base/timer/timer.h"
#include "media/audio/audio_io.h"
#include "media/base/audio_parameters.h"
namespace media {
class AudioManagerFuchsia;
class AudioOutputStreamFuchsia : public AudioOutputStream {
public:
// Caller must ensure that manager outlives the stream.
AudioOutputStreamFuchsia(AudioManagerFuchsia* manager,
const std::string& device_id,
const AudioParameters& parameters);
// AudioOutputStream interface.
bool Open() override;
void Start(AudioSourceCallback* callback) override;
void Stop() override;
void SetVolume(double volume) override;
void GetVolume(double* volume) override;
void Close() override;
private:
~AudioOutputStreamFuchsia() override;
base::TimeTicks GetCurrentStreamTime();
// Updates |presentation_delay_ns_|.
bool UpdatePresentationDelay();
// Requests data from AudioSourceCallback, passes it to the mixer and
// schedules |timer_| for the next call.
void PumpSamples();
AudioManagerFuchsia* manager_;
std::string device_id_;
AudioParameters parameters_;
// These are used only in PumpSamples(). They are kept here to avoid
// reallocating the memory every time.
std::unique_ptr<AudioBus> audio_bus_;
std::vector<float> buffer_;
fuchsia_audio_output_stream* stream_ = nullptr;
AudioSourceCallback* callback_ = nullptr;
double volume_ = 1.0;
base::TimeTicks started_time_;
int64_t stream_position_samples_ = 0;
// Total presentation delay for the stream. This value is returned by
// fuchsia_audio_output_stream_get_min_delay()
zx_duration_t presentation_delay_ns_ = 0;
// Timer that's scheduled to call PumpSamples().
base::OneShotTimer timer_;
DISALLOW_COPY_AND_ASSIGN(AudioOutputStreamFuchsia);
};
} // namespace media
#endif // MEDIA_AUDIO_FUCHSIA_AUDIO_OUTPUT_STREAM_FUCHSIA_H_