blob: 7566eacf10ba297b51798009e91ac59291da1693 [file] [log] [blame]
// 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.
#include <string>
#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/audio/audio_parameters.h"
struct pa_context;
struct pa_source_info;
struct pa_stream;
struct pa_threaded_mainloop;
namespace media {
class AudioManagerPulse;
class SeekableBuffer;
class PulseAudioInputStream : public AgcAudioStream<AudioInputStream> {
PulseAudioInputStream(AudioManagerPulse* audio_manager,
const std::string& device_name,
const AudioParameters& params,
pa_threaded_mainloop* mainloop,
pa_context* context);
virtual ~PulseAudioInputStream();
// Implementation of AudioInputStream.
virtual bool Open() OVERRIDE;
virtual void Start(AudioInputCallback* callback) OVERRIDE;
virtual void Stop() OVERRIDE;
virtual void Close() OVERRIDE;
virtual double GetMaxVolume() OVERRIDE;
virtual void SetVolume(double volume) OVERRIDE;
virtual double GetVolume() OVERRIDE;
// 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);
// Helper for the ReadCallback.
void ReadData();
AudioManagerPulse* audio_manager_;
AudioInputCallback* callback_;
std::string device_name_;
AudioParameters params_;
int channels_;
double volume_;
bool stream_started_;
// Holds the data from the OS.
scoped_ptr<media::SeekableBuffer> buffer_;
// Temporary storage for recorded data. It gets a packet of data from
// |buffer_| and deliver the data to OnData() callback.
scoped_ptr<uint8[]> audio_data_buffer_;
// PulseAudio API structs.
pa_threaded_mainloop* pa_mainloop_; // Weak.
pa_context* pa_context_; // Weak.
pa_stream* handle_;
// Flag indicating the state of the context has been changed.
bool context_state_changed_;
base::ThreadChecker thread_checker_;
} // namespace media