chromium/media/audio/pulse/pulse_output.h

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Creates an audio output stream based on the PulseAudio asynchronous API;
// specifically using the pa_threaded_mainloop model.
//
// If the stream is successfully opened, Close() must be called before the
// stream is deleted as Close() is responsible for ensuring resource cleanup
// occurs.
//
// This object is designed so that all AudioOutputStream methods will be called
// on the same thread that created the object.
//
// WARNING: This object blocks on internal PulseAudio calls in Open() while
// waiting for PulseAudio's context structure to be ready.  It also blocks in
// inside PulseAudio in Start() and repeated during playback, waiting for
// PulseAudio write callbacks to occur.

#ifndef MEDIA_AUDIO_PULSE_PULSE_OUTPUT_H_
#define MEDIA_AUDIO_PULSE_PULSE_OUTPUT_H_

#include <stddef.h>

#include <memory>
#include <string>

#include "base/memory/raw_ptr.h"
#include "base/threading/thread_checker.h"
#include "media/audio/audio_io.h"
#include "media/audio/audio_manager.h"
#include "media/base/amplitude_peak_detector.h"
#include "media/base/audio_parameters.h"

struct pa_context;
struct pa_stream;
struct pa_threaded_mainloop;

namespace media {
class AudioManagerBase;

class PulseAudioOutputStream : public AudioOutputStream { … };

}  // namespace media

#endif  // MEDIA_AUDIO_PULSE_PULSE_OUTPUT_H_