status_t AudioALSACaptureDataProviderBTSCO::GetCaptureTimeStamp(time_info_struct_t *Time_Info, size_t read_size)
{
ALOGV("%s()", __FUNCTION__);
ASSERT(mPcm != NULL);
long ret_ns;
size_t avail;
Time_Info->timestamp_get.tv_sec = 0;
Time_Info->timestamp_get.tv_nsec = 0;
Time_Info->frameInfo_get = 0;
Time_Info->buffer_per_time = 0;
Time_Info->kernelbuffer_ns = 0;
//ALOGD("%s(), Going to check pcm_get_htimestamp", __FUNCTION__);
if (pcm_get_htimestamp(mPcm, &Time_Info->frameInfo_get, &Time_Info->timestamp_get) == 0)
{
Time_Info->buffer_per_time = pcm_bytes_to_frames(mPcm, read_size);
Time_Info->kernelbuffer_ns = 1000000000 / mStreamAttributeSource.sample_rate * (Time_Info->buffer_per_time + Time_Info->frameInfo_get);
ALOGV("%s pcm_get_htimestamp sec= %ld, nsec=%ld, frameInfo_get = %d, buffer_per_time=%d, ret_ns = %ld\n",
__FUNCTION__, Time_Info->timestamp_get.tv_sec, Time_Info->timestamp_get.tv_nsec, Time_Info->frameInfo_get,
Time_Info->buffer_per_time, Time_Info->kernelbuffer_ns);
}
else
{
ALOGE("%s pcm_get_htimestamp fail %s\n", __FUNCTION__, pcm_get_error(mPcm));
}
return NO_ERROR;
}
EXTERN_TAG int pcm_output_latency()
{
#if 1
struct timespec tstamp;
unsigned int avail = 0;
int ret;
ret = pcm_get_htimestamp(wfd_pcm,&avail, &tstamp);
//adec_print("pcm_get_latency ret %d,latency %d \n",ret,avail*1000/48000);
if(ret)
return ret;
else
return avail*1000/wfd_config_out.rate;
#else
return pcm_hw_lantency(wfd_pcm);
#endif
}
int proxy_get_presentation_position(const alsa_device_proxy * proxy,
uint64_t *frames, struct timespec *timestamp)
{
int ret = -EPERM; // -1
unsigned int avail;
if (proxy->pcm != NULL
&& pcm_get_htimestamp(proxy->pcm, &avail, timestamp) == 0) {
const size_t kernel_buffer_size =
proxy->alsa_config.period_size * proxy->alsa_config.period_count;
if (avail > kernel_buffer_size) {
ALOGE("available frames(%u) > buffer size(%zu)", avail, kernel_buffer_size);
} else {
int64_t signed_frames = proxy->transferred - kernel_buffer_size + avail;
// It is possible to compensate for additional driver and device delay
// by changing signed_frames. Example:
// signed_frames -= 20 /* ms */ * proxy->alsa_config.rate / 1000;
if (signed_frames >= 0) {
*frames = signed_frames;
ret = 0;
}
}
}
return ret;
}