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[DEV] try have good timestamp

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This commit is contained in:
Edouard DUPIN 2015-02-19 22:49:33 +01:00
parent c685c176dd
commit 3a9ce1ffd9
1 changed files with 57 additions and 20 deletions
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77
airtaudio/api/Alsa.cpp
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@ -975,10 +975,36 @@ std::chrono::time_point<std::chrono::system_clock> airtaudio::api::Alsa::getStre
return m_startTime + m_duration;
}
*/
#if 1
std::chrono::time_point<std::chrono::system_clock> airtaudio::api::Alsa::getStreamTime() {
if (m_startTime == std::chrono::system_clock::time_point()) {
m_startTime = std::chrono::system_clock::now();
// Corection of time stamp with the input properties ...
if (m_private->handles[0] != nullptr) {
//output
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) {
//input
/*
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;
}
#else
std::chrono::time_point<std::chrono::system_clock> airtaudio::api::Alsa::getStreamTime() {
snd_pcm_status_t *status = nullptr;
snd_timestamp_t timestamp;
snd_htimestamp_t timestampHighRes;
snd_pcm_status_alloca(&status);
if(m_private->handles[1]) {
snd_pcm_status(m_private->handles[1], status);
@ -987,7 +1013,12 @@ std::chrono::time_point<std::chrono::system_clock> airtaudio::api::Alsa::getStre
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);
ATA_WARNING("snd_pcm_status_get_trigger_tstamp : " << m_startTime);
snd_pcm_status_get_htstamp(status, &timestampHighRes);
ATA_WARNING("snd_pcm_status_get_htstamp : " << std::chrono::system_clock::from_time_t(timestampHighRes.tv_sec) + std::chrono::nanoseconds(timestampHighRes.tv_nsec););
snd_pcm_status_get_audio_htstamp(status, &timestampHighRes);
ATA_WARNING("snd_pcm_status_get_audio_htstamp : " << std::chrono::system_clock::from_time_t(timestampHighRes.tv_sec) + std::chrono::nanoseconds(timestampHighRes.tv_nsec););
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");
@ -1008,7 +1039,7 @@ std::chrono::time_point<std::chrono::system_clock> airtaudio::api::Alsa::getStre
}
return std::chrono::system_clock::now();
}
#endif
void airtaudio::api::Alsa::callbackEventOneCycle() {
if (m_state == airtaudio::state_stopped) {
@ -1028,7 +1059,7 @@ void airtaudio::api::Alsa::callbackEventOneCycle() {
return; // TODO : notify appl: airtaudio::error_warning;
}
int32_t doStopStream = 0;
std::chrono::system_clock::time_point streamTime = getStreamTime();
std::chrono::system_clock::time_point streamTime;
std::vector<enum airtaudio::status> status;
if ( m_mode != airtaudio::mode_input
&& m_private->xrun[0] == true) {
@ -1040,21 +1071,6 @@ void airtaudio::api::Alsa::callbackEventOneCycle() {
status.push_back(airtaudio::status_overflow);
m_private->xrun[1] = false;
}
doStopStream = m_callback(&m_userBuffer[1][0],
streamTime,// - std::chrono::nanoseconds(m_latency[1]*1000000000LL/int64_t(m_sampleRate)),
&m_userBuffer[0][0],
streamTime,// + std::chrono::nanoseconds(m_latency[0]*1000000000LL/int64_t(m_sampleRate)),
m_bufferSize,
status);
if (doStopStream == 2) {
abortStream();
return;
}
std::unique_lock<std::mutex> lck(m_mutex);
// The state might change while waiting on a mutex.
if (m_state == airtaudio::state_stopped) {
goto unlock;
}
int32_t result;
char *buffer;
int32_t channels;
@ -1062,8 +1078,14 @@ void airtaudio::api::Alsa::callbackEventOneCycle() {
snd_pcm_sframes_t frames;
audio::format format;
handle = (snd_pcm_t **) m_private->handles;
if (m_state == airtaudio::state_stopped) {
goto unlock;
}
if ( m_mode == airtaudio::mode_input
|| m_mode == airtaudio::mode_duplex) {
std::unique_lock<std::mutex> lck(m_mutex);
// Setup parameters.
if (m_doConvertBuffer[1]) {
buffer = m_deviceBuffer;
@ -1084,6 +1106,8 @@ void airtaudio::api::Alsa::callbackEventOneCycle() {
bufs[i] = (void *) (buffer + (i * offset));
result = snd_pcm_readn(handle[1], bufs, m_bufferSize);
}
// get timestamp : (to init here ...
streamTime = getStreamTime();
if (result < (int) m_bufferSize) {
// Either an error or overrun occured.
if (result == -EPIPE) {
@ -1101,7 +1125,7 @@ void airtaudio::api::Alsa::callbackEventOneCycle() {
ATA_ERROR("audio read error, " << snd_strerror(result) << ".");
}
// TODO : Notify application ... airtaudio::error_warning;
goto tryOutput;
goto noInput;
}
// Do byte swapping if necessary.
if (m_doByteSwap[1]) {
@ -1119,9 +1143,22 @@ void airtaudio::api::Alsa::callbackEventOneCycle() {
}
}
tryOutput:
noInput:
streamTime = getStreamTime();
doStopStream = m_callback(&m_userBuffer[1][0],
streamTime,// - std::chrono::nanoseconds(m_latency[1]*1000000000LL/int64_t(m_sampleRate)),
&m_userBuffer[0][0],
streamTime,// + std::chrono::nanoseconds(m_latency[0]*1000000000LL/int64_t(m_sampleRate)),
m_bufferSize,
status);
if (doStopStream == 2) {
abortStream();
return;
}
if ( m_mode == airtaudio::mode_output
|| m_mode == airtaudio::mode_duplex) {
std::unique_lock<std::mutex> lck(m_mutex);
// Setup parameters and do buffer conversion if necessary.
if (m_doConvertBuffer[0]) {
buffer = m_deviceBuffer;