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[DEV] try alsa time stamp

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This commit is contained in:
Edouard DUPIN 2015-02-19 22:00:21 +01:00
parent 1baebd1029
commit c685c176dd
1 changed files with 56 additions and 5 deletions
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61
airtaudio/api/Alsa.cpp
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@ -777,7 +777,7 @@ enum airtaudio::error airtaudio::api::Alsa::closeStream() {
enum airtaudio::error airtaudio::api::Alsa::startStream() {
// TODO : Check return ...
airtaudio::Api::startStream();
//airtaudio::Api::startStream();
// This method calls snd_pcm_prepare if the device isn't already in that state.
if (verifyStream() != airtaudio::error_none) {
return airtaudio::error_fail;
@ -942,6 +942,7 @@ namespace std {
return _os;
}
}
/*
std::chrono::time_point<std::chrono::system_clock> airtaudio::api::Alsa::getStreamTime() {
if (m_startTime == std::chrono::system_clock::time_point()) {
snd_pcm_uframes_t avail;
@ -953,12 +954,60 @@ std::chrono::time_point<std::chrono::system_clock> airtaudio::api::Alsa::getStre
}
//ATA_WARNING("plop : " << tstamp.tv_sec << " sec " << tstamp.tv_nsec);
//return std::chrono::system_clock::from_time_t(tstamp.tv_sec) + std::chrono::nanoseconds(tstamp.tv_nsec);
//m_startTime = std::chrono::system_clock::from_time_t(tstamp.tv_sec) + std::chrono::nanoseconds(tstamp.tv_nsec);
//m_duration = std::chrono::microseconds(0);
m_startTime = std::chrono::system_clock::from_time_t(tstamp.tv_sec) + std::chrono::nanoseconds(tstamp.tv_nsec);
m_startTime = std::chrono::system_clock::now();
if (m_private->handles[0] != nullptr) {
//m_startTime += std::chrono::nanoseconds(m_bufferSize*1000000000LL/int64_t(m_sampleRate));
snd_pcm_sframes_t frames;
int result = snd_pcm_delay(m_private->handles[0], &frames);
m_startTime += std::chrono::nanoseconds(frames*1000000000LL/int64_t(m_sampleRate));
} else if (m_private->handles[1] != nullptr) {
//m_startTime -= std::chrono::nanoseconds(m_bufferSize*1000000000LL/int64_t(m_sampleRate));
snd_pcm_sframes_t frames;
int result = snd_pcm_delay(m_private->handles[1], &frames);
m_startTime -= std::chrono::nanoseconds(frames*1000000000LL/int64_t(m_sampleRate));
}
m_duration = std::chrono::microseconds(0);
}
//ATA_DEBUG(" createTimeStamp : " << m_startTime + m_duration);
return m_startTime + m_duration;
}
*/
std::chrono::time_point<std::chrono::system_clock> airtaudio::api::Alsa::getStreamTime() {
snd_pcm_status_t *status = nullptr;
snd_timestamp_t timestamp;
snd_pcm_status_alloca(&status);
if(m_private->handles[1]) {
snd_pcm_status(m_private->handles[1], status);
snd_pcm_status_get_tstamp(status, &timestamp);
m_startTime = std::chrono::system_clock::from_time_t(timestamp.tv_sec) + std::chrono::microseconds(timestamp.tv_usec);
ATA_WARNING("time : " << m_startTime);
snd_pcm_status_get_trigger_tstamp(status, &timestamp);
m_startTime = std::chrono::system_clock::from_time_t(timestamp.tv_sec) + std::chrono::microseconds(timestamp.tv_usec);
ATA_WARNING("start : " << m_startTime);
snd_pcm_sframes_t delay = snd_pcm_status_get_delay(status);
//return m_startTime - std::chrono::nanoseconds(delay*1000000000LL/int64_t(m_sampleRate));
ATA_WARNING("delay : " << std::chrono::nanoseconds(delay*1000000000LL/int64_t(m_sampleRate)).count() << " ns");
return m_startTime + m_duration;
}
if(m_private->handles[0]) {
snd_pcm_status(m_private->handles[0], status);
snd_pcm_status_get_tstamp(status, &timestamp);
m_startTime = std::chrono::system_clock::from_time_t(timestamp.tv_sec) + std::chrono::microseconds(timestamp.tv_usec);
ATA_WARNING("time : " << m_startTime);
snd_pcm_status_get_trigger_tstamp(status, &timestamp);
m_startTime = std::chrono::system_clock::from_time_t(timestamp.tv_sec) + std::chrono::microseconds(timestamp.tv_usec);
ATA_WARNING("start : " << m_startTime);
snd_pcm_sframes_t delay = snd_pcm_status_get_delay(status);
//return m_startTime + std::chrono::nanoseconds(delay*1000000000LL/int64_t(m_sampleRate));
ATA_WARNING("delay : " << std::chrono::nanoseconds(delay*1000000000LL/int64_t(m_sampleRate)).count() << " ns");
return m_startTime + m_duration;
}
return std::chrono::system_clock::now();
}
void airtaudio::api::Alsa::callbackEventOneCycle() {
@ -992,9 +1041,9 @@ void airtaudio::api::Alsa::callbackEventOneCycle() {
m_private->xrun[1] = false;
}
doStopStream = m_callback(&m_userBuffer[1][0],
streamTime,
streamTime,// - std::chrono::nanoseconds(m_latency[1]*1000000000LL/int64_t(m_sampleRate)),
&m_userBuffer[0][0],
streamTime,
streamTime,// + std::chrono::nanoseconds(m_latency[0]*1000000000LL/int64_t(m_sampleRate)),
m_bufferSize,
status);
if (doStopStream == 2) {
@ -1065,6 +1114,7 @@ void airtaudio::api::Alsa::callbackEventOneCycle() {
// Check stream latency
result = snd_pcm_delay(handle[1], &frames);
if (result == 0 && frames > 0) {
ATA_WARNING("Delay in the Input " << frames << " chunk");
m_latency[1] = frames;
}
}
@ -1120,6 +1170,7 @@ tryOutput:
// Check stream latency
result = snd_pcm_delay(handle[0], &frames);
if (result == 0 && frames > 0) {
ATA_WARNING("Delay in the Output " << frames << " chunk");
m_latency[0] = frames;
}
}