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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.
#include "media/audio/openbsd/audio_manager_openbsd.h"
#include "base/command_line.h"
#include "base/stl_util.h"
#include "media/audio/audio_output_dispatcher.h"
#include "media/audio/audio_parameters.h"
#include "media/audio/audio_util.h"
#if defined(USE_PULSEAUDIO)
#include "media/audio/pulse/pulse_output.h"
#endif
#include "media/base/channel_layout.h"
#include "media/base/limits.h"
#include "media/base/media_switches.h"
#include <fcntl.h>
namespace media {
// Maximum number of output streams that can be open simultaneously.
static const int kMaxOutputStreams = 50;
// Default sample rate for input and output streams.
static const int kDefaultSampleRate = 48000;
// Implementation of AudioManager.
static bool HasAudioHardware() {
int fd;
const char *file;
if ((file = getenv("AUDIOCTLDEVICE")) == 0 || *file == '\0')
file = "/dev/audioctl";
if ((fd = open(file, O_RDONLY)) < 0)
return false;
close(fd);
return true;
}
bool AudioManagerOpenBSD::HasAudioOutputDevices() {
return HasAudioHardware();
}
bool AudioManagerOpenBSD::HasAudioInputDevices() {
return HasAudioHardware();
}
AudioParameters AudioManagerOpenBSD::GetInputStreamParameters(
const std::string& device_id) {
static const int kDefaultInputBufferSize = 1024;
return AudioParameters(
AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO,
kDefaultSampleRate, 16, kDefaultInputBufferSize);
}
AudioManagerOpenBSD::AudioManagerOpenBSD() {
SetMaxOutputStreamsAllowed(kMaxOutputStreams);
}
AudioManagerOpenBSD::~AudioManagerOpenBSD() {
Shutdown();
}
AudioOutputStream* AudioManagerOpenBSD::MakeLinearOutputStream(
const AudioParameters& params) {
DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format);
return MakeOutputStream(params);
}
AudioOutputStream* AudioManagerOpenBSD::MakeLowLatencyOutputStream(
const AudioParameters& params) {
DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format);
return MakeOutputStream(params);
}
AudioInputStream* AudioManagerOpenBSD::MakeLinearInputStream(
const AudioParameters& params, const std::string& device_id) {
DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format);
NOTIMPLEMENTED();
return NULL;
}
AudioInputStream* AudioManagerOpenBSD::MakeLowLatencyInputStream(
const AudioParameters& params, const std::string& device_id) {
DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format);
NOTIMPLEMENTED();
return NULL;
}
AudioParameters AudioManagerOpenBSD::GetPreferredOutputStreamParameters(
const AudioParameters& input_params) {
static const int kDefaultOutputBufferSize = 512;
ChannelLayout channel_layout = CHANNEL_LAYOUT_STEREO;
int sample_rate = kDefaultSampleRate;
int buffer_size = kDefaultOutputBufferSize;
int bits_per_sample = 16;
int input_channels = 0;
if (input_params.IsValid()) {
sample_rate = input_params.sample_rate();
bits_per_sample = input_params.bits_per_sample();
channel_layout = input_params.channel_layout();
input_channels = input_params.input_channels();
buffer_size = std::min(buffer_size, input_params.frames_per_buffer());
}
int user_buffer_size = GetUserBufferSize();
if (user_buffer_size)
buffer_size = user_buffer_size;
return AudioParameters(
AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, input_channels,
sample_rate, bits_per_sample, buffer_size);
}
AudioOutputStream* AudioManagerOpenBSD::MakeOutputStream(
const AudioParameters& params) {
#if defined(USE_PULSEAUDIO)
if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kUsePulseAudio)) {
return new PulseAudioOutputStream(params, this);
}
#endif
NOTIMPLEMENTED();
return NULL;
}
// TODO(xians): Merge AudioManagerOpenBSD with AudioManagerPulse;
// static
AudioManager* CreateAudioManager() {
return new AudioManagerOpenBSD();
}
} // namespace media
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