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/* AudioStreamInALSA.cpp
**
** Copyright 2008-2009 Wind River Systems
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include <errno.h>
#include <stdarg.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <dlfcn.h>
#define LOG_TAG "AudioHardwareALSA"
#include <utils/Log.h>
#include <utils/String8.h>
#include <cutils/properties.h>
#include <media/AudioRecord.h>
#include <hardware_legacy/power.h>
#include "AudioHardwareALSA.h"
namespace android
{
AudioStreamInALSA::AudioStreamInALSA(AudioHardwareALSA *parent,
alsa_handle_t *handle,
AudioSystem::audio_in_acoustics audio_acoustics) :
ALSAStreamOps(parent, handle),
mAcoustics(audio_acoustics)
{
acoustic_device_t *aDev = acoustics();
if (aDev) aDev->set_params(aDev, mAcoustics, NULL);
}
AudioStreamInALSA::~AudioStreamInALSA()
{
close();
}
status_t AudioStreamInALSA::setGain(float gain)
{
return mixer() ? mixer()->setMasterGain(gain) : (status_t)NO_INIT;
}
ssize_t AudioStreamInALSA::read(void *buffer, ssize_t bytes)
{
AutoMutex lock(mLock);
if (!mPowerLock) {
acquire_wake_lock (PARTIAL_WAKE_LOCK, "AudioInLock");
mPowerLock = true;
}
acoustic_device_t *aDev = acoustics();
// If there is an acoustics module read method, then it overrides this
// implementation (unlike AudioStreamOutALSA write).
if (aDev && aDev->read)
return aDev->read(aDev, buffer, bytes);
snd_pcm_sframes_t n, frames = snd_pcm_bytes_to_frames(mHandle->handle, bytes);
status_t err;
do {
n = snd_pcm_readi(mHandle->handle, buffer, frames);
if (n < frames) {
if (mHandle->handle) {
if (n < 0) {
n = snd_pcm_recover(mHandle->handle, n, 0);
if (aDev && aDev->recover) aDev->recover(aDev, n);
} else
n = snd_pcm_prepare(mHandle->handle);
}
return static_cast<ssize_t>(n);
}
} while (n == -EAGAIN);
return static_cast<ssize_t>(snd_pcm_frames_to_bytes(mHandle->handle, n));
}
status_t AudioStreamInALSA::dump(int fd, const Vector<String16>& args)
{
return NO_ERROR;
}
status_t AudioStreamInALSA::open(int mode)
{
AutoMutex lock(mLock);
status_t status = ALSAStreamOps::open(mode);
acoustic_device_t *aDev = acoustics();
if (status == NO_ERROR && aDev)
status = aDev->use_handle(aDev, mHandle);
return status;
}
status_t AudioStreamInALSA::close()
{
AutoMutex lock(mLock);
acoustic_device_t *aDev = acoustics();
if (mHandle && aDev) aDev->cleanup(aDev);
ALSAStreamOps::close();
if (mPowerLock) {
release_wake_lock ("AudioInLock");
mPowerLock = false;
}
return NO_ERROR;
}
status_t AudioStreamInALSA::standby()
{
AutoMutex lock(mLock);
if (mPowerLock) {
release_wake_lock ("AudioInLock");
mPowerLock = false;
}
return NO_ERROR;
}
status_t AudioStreamInALSA::setAcousticParams(void *params)
{
AutoMutex lock(mLock);
acoustic_device_t *aDev = acoustics();
return aDev ? aDev->set_params(aDev, mAcoustics, params) : (status_t)NO_ERROR;
}
} // namespace android
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