static ssize_t out_write(struct audio_stream_out *stream, const void* buffer,
size_t bytes)
{
int ret;
struct stream_out *out = (struct stream_out *)stream;
pthread_mutex_lock(&out->dev->lock);
pthread_mutex_lock(&out->lock);
if (out->standby) {
ret = start_output_stream(out);
if (ret != 0) {
goto err;
}
out->standby = false;
}
pcm_write(out->pcm, (void *)buffer, bytes);
pthread_mutex_unlock(&out->lock);
pthread_mutex_unlock(&out->dev->lock);
return bytes;
err:
pthread_mutex_unlock(&out->lock);
if (ret != 0) {
usleep(bytes * 1000000 / audio_stream_frame_size(&stream->common) /
out_get_sample_rate(&stream->common));
}
return bytes;
}
static ssize_t out_write(struct audio_stream_out *stream, const void* buffer, size_t bytes)
{
int ret;
struct stream_out *out = (struct stream_out *)stream;
pthread_mutex_lock(&out->dev->lock);
pthread_mutex_lock(&out->lock);
if (out->standby) {
ret = start_output_stream(out);
if (ret != 0) {
pthread_mutex_unlock(&out->dev->lock);
goto err;
}
out->standby = false;
}
pthread_mutex_unlock(&out->dev->lock);
alsa_device_proxy* proxy = &out->proxy;
const void * write_buff = buffer;
int num_write_buff_bytes = bytes;
const int num_device_channels = proxy_get_channel_count(proxy); /* what we told alsa */
const int num_req_channels = out->hal_channel_count; /* what we told AudioFlinger */
if (num_device_channels != num_req_channels) {
/* allocate buffer */
const size_t required_conversion_buffer_size =
bytes * num_device_channels / num_req_channels;
if (required_conversion_buffer_size > out->conversion_buffer_size) {
out->conversion_buffer_size = required_conversion_buffer_size;
out->conversion_buffer = realloc(out->conversion_buffer,
out->conversion_buffer_size);
}
/* convert data */
const audio_format_t audio_format = out_get_format(&(out->stream.common));
const unsigned sample_size_in_bytes = audio_bytes_per_sample(audio_format);
num_write_buff_bytes =
adjust_channels(write_buff, num_req_channels,
out->conversion_buffer, num_device_channels,
sample_size_in_bytes, num_write_buff_bytes);
write_buff = out->conversion_buffer;
}
if (write_buff != NULL && num_write_buff_bytes != 0) {
proxy_write(&out->proxy, write_buff, num_write_buff_bytes);
}
pthread_mutex_unlock(&out->lock);
return bytes;
err:
pthread_mutex_unlock(&out->lock);
if (ret != 0) {
usleep(bytes * 1000000 / audio_stream_out_frame_size(stream) /
out_get_sample_rate(&stream->common));
}
return bytes;
}
static ssize_t out_write(struct audio_stream_out *stream, const void* buffer,
size_t bytes)
{
int ret = 0;
struct stream_out *out = (struct stream_out *)stream;
struct audio_device *adev = out ? out->dev : NULL;
if(adev == NULL) return -ENOSYS;
ALOGV("%s enter",__func__);
pthread_mutex_lock(&out->dev->lock);
pthread_mutex_lock(&out->lock);
// there is a possibility that the HD interface is open
// and normal pcm stream is still active. Feed the new
// interface to normal pcm stream
if(adev->active_pcm) {
if(adev->active_pcm != out->pcm)
out->pcm = adev->active_pcm;
}
if ((out->standby) || (!adev->active_pcm)) {
ret = start_output_stream(out);
if (ret != 0) {
goto err;
}
out->standby = false;
}
if(!out->pcm){
ALOGD("%s: null handle to write - device already closed",__func__);
goto err;
}
ret = pcm_write(out->pcm, (void *)buffer, bytes);
ALOGVV("%s: pcm_write returned = %d rate = %d",__func__,ret,out->pcm_config.rate);
err:
pthread_mutex_unlock(&out->lock);
pthread_mutex_unlock(&out->dev->lock);
if (ret != 0) {
uint64_t duration_ms = ((bytes * 1000)/
(audio_stream_frame_size(&stream->common)) /
(out_get_sample_rate(&stream->common)));
ALOGV("%s : silence written", __func__);
usleep(duration_ms * 1000);
}
ALOGV("%s exit",__func__);
return bytes;
}