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// Copyright 2013 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/sndio/sndio_input.h"
#include <stddef.h>
#include "base/bind.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/message_loop/message_loop.h"
#include "media/audio/openbsd/audio_manager_openbsd.h"
#include "media/audio/audio_manager.h"
namespace media {
static const SampleFormat kSampleFormat = kSampleFormatS16;
void sndio_in_onmove(void *arg, int delta) {
NOTIMPLEMENTED();
SndioAudioInputStream* self = static_cast<SndioAudioInputStream*>(arg);
self->hw_delay_ = delta - self->params_.GetBytesPerFrame(kSampleFormat);
}
void *sndio_in_threadstart(void *arg) {
NOTIMPLEMENTED();
SndioAudioInputStream* self = static_cast<SndioAudioInputStream*>(arg);
self->ReadAudio();
return NULL;
}
SndioAudioInputStream::SndioAudioInputStream(AudioManagerBase* audio_manager,
const std::string& device_name,
const AudioParameters& params)
: audio_manager_(audio_manager),
device_name_(device_name),
params_(params),
bytes_per_buffer_(params.GetBytesPerBuffer(kSampleFormat)),
buffer_duration_(base::TimeDelta::FromMicroseconds(
params.frames_per_buffer() * base::Time::kMicrosecondsPerSecond /
static_cast<float>(params.sample_rate()))),
callback_(NULL),
device_handle_(NULL),
read_callback_behind_schedule_(false),
audio_bus_(AudioBus::Create(params)) {
}
SndioAudioInputStream::~SndioAudioInputStream() {}
bool SndioAudioInputStream::Open() {
struct sio_par par;
int sig;
if (device_handle_)
return false; // Already open.
if (params_.format() != AudioParameters::AUDIO_PCM_LINEAR &&
params_.format() != AudioParameters::AUDIO_PCM_LOW_LATENCY) {
LOG(WARNING) << "Unsupported audio format.";
return false;
}
sio_initpar(&par);
par.rate = params_.sample_rate();
par.pchan = params_.channels();
par.bits = SampleFormatToBytesPerChannel(kSampleFormat);
par.bps = par.bits / 8;
par.sig = sig = par.bits != 8 ? 1 : 0;
par.le = SIO_LE_NATIVE;
par.appbufsz = params_.frames_per_buffer();
sndio_rec_bufsz_ = par.bufsz;
sndio_rec_bufsize_ = par.round * par.bps * par.rchan;
device_handle_ = sio_open(SIO_DEVANY, SIO_REC, 0);
if (device_handle_ == NULL) {
LOG(ERROR) << "Couldn't open audio device.";
return false;
}
if (!sio_setpar(device_handle_, &par) || !sio_getpar(device_handle_, &par)) {
LOG(ERROR) << "Couldn't set audio parameters.";
goto bad_close;
}
if (par.rate != (unsigned int)params_.sample_rate() ||
par.pchan != (unsigned int)params_.channels() ||
par.bits != (unsigned int)SampleFormatToBytesPerChannel(kSampleFormat) ||
par.sig != (unsigned int)sig ||
(par.bps > 1 && par.le != SIO_LE_NATIVE) ||
(par.bits != par.bps * 8)) {
LOG(ERROR) << "Unsupported audio parameters.";
goto bad_close;
}
sio_onmove(device_handle_, sndio_in_onmove, this);
audio_buffer_.reset(new uint8_t[bytes_per_buffer_]);
return true;
bad_close:
sio_close(device_handle_);
return false;
}
void SndioAudioInputStream::Start(AudioInputCallback* callback) {
DCHECK(!callback_ && callback);
callback_ = callback;
StartAgc();
// We start reading data half |buffer_duration_| later than when the
// buffer might have got filled, to accommodate some delays in the audio
// driver. This could also give us a smooth read sequence going forward.
base::TimeDelta delay = buffer_duration_ + buffer_duration_ / 2;
next_read_time_ = base::TimeTicks::Now() + delay;
if (pthread_create(&thread_, NULL, sndio_in_threadstart, this) != 0)
LOG(ERROR) << "Failed to create real-time thread.";
}
void SndioAudioInputStream::ReadAudio() {
NOTIMPLEMENTED();
}
void SndioAudioInputStream::Stop() {
if (!device_handle_ || !callback_)
return;
StopAgc();
pthread_join(thread_, NULL);
sio_stop(device_handle_);
callback_ = NULL;
}
void SndioAudioInputStream::Close() {
if (device_handle_) {
sio_close(device_handle_);
audio_buffer_.reset();
device_handle_ = NULL;
}
audio_manager_->ReleaseInputStream(this);
}
double SndioAudioInputStream::GetMaxVolume() {
return static_cast<double>(SIO_MAXVOL);
}
void SndioAudioInputStream::SetVolume(double volume) {
NOTIMPLEMENTED();
}
double SndioAudioInputStream::GetVolume() {
long current_volume = 0;
return static_cast<double>(current_volume);
}
bool SndioAudioInputStream::IsMuted() {
return false;
}
void SndioAudioInputStream::SetOutputDeviceForAec(
const std::string& output_device_id) {
// Not supported. Do nothing.
}
} // namespace media
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