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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 MEDIA_AUDIO_PULSE_PULSE_INPUT_H_
#define MEDIA_AUDIO_PULSE_PULSE_INPUT_H_
#include <pulse/pulseaudio.h>
#include <stddef.h>
#include <string>
#include "base/macros.h"
#include "base/threading/thread_checker.h"
#include "media/audio/agc_audio_stream.h"
#include "media/audio/audio_device_name.h"
#include "media/audio/audio_io.h"
#include "media/base/audio_block_fifo.h"
#include "media/base/audio_parameters.h"
namespace media {
class AudioManagerPulse;
class PulseAudioInputStream : public AgcAudioStream<AudioInputStream> {
public:
PulseAudioInputStream(AudioManagerPulse* audio_manager,
const std::string& device_name,
const AudioParameters& params,
pa_threaded_mainloop* mainloop,
pa_context* context);
~PulseAudioInputStream() override;
// Implementation of AudioInputStream.
bool Open() override;
void Start(AudioInputCallback* callback) override;
void Stop() override;
void Close() override;
double GetMaxVolume() override;
void SetVolume(double volume) override;
double GetVolume() override;
bool IsMuted() override;
private:
// PulseAudio Callbacks.
static void ReadCallback(pa_stream* handle, size_t length, void* user_data);
static void StreamNotifyCallback(pa_stream* stream, void* user_data);
static void VolumeCallback(pa_context* context, const pa_source_info* info,
int error, void* user_data);
static void MuteCallback(pa_context* context,
const pa_source_info* info,
int error,
void* user_data);
// Helper for the ReadCallback.
void ReadData();
// Utility method used by GetVolume() and IsMuted().
bool GetSourceInformation(pa_source_info_cb_t callback);
AudioManagerPulse* audio_manager_;
AudioInputCallback* callback_;
std::string device_name_;
AudioParameters params_;
int channels_;
double volume_;
bool stream_started_;
// Set to true in IsMuted() if user has muted the selected microphone in the
// sound settings UI.
bool muted_;
// Holds the data from the OS.
AudioBlockFifo fifo_;
// PulseAudio API structs.
pa_threaded_mainloop* pa_mainloop_; // Weak.
pa_context* pa_context_; // Weak.
pa_stream* handle_;
base::ThreadChecker thread_checker_;
DISALLOW_COPY_AND_ASSIGN(PulseAudioInputStream);
};
} // namespace media
#endif // MEDIA_AUDIO_PULSE_PULSE_INPUT_H_