// TODO first frame causes broken pipe (underrun) because not enough data is sent
// we should wait until the handle is ready
void
AlsaLayer::write(SFLAudioSample* buffer, int frames, snd_pcm_t * handle)
{
// Skip empty buffers
if (!frames)
return;
int err = snd_pcm_writei(handle, (const void*)buffer, frames);
if (err < 0)
snd_pcm_recover(handle, err, 0);
if (err >= 0)
return;
switch (err) {
case -EPIPE:
case -ESTRPIPE:
case -EIO: {
snd_pcm_status_t* status;
snd_pcm_status_alloca(&status);
if (ALSA_CALL(snd_pcm_status(handle, status), "Cannot get playback handle status") >= 0)
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
stopPlaybackStream();
preparePlaybackStream();
startPlaybackStream();
}
ALSA_CALL(snd_pcm_writei(handle, (const void*)buffer, frames), "XRUN handling failed");
break;
}
case -EBADFD: {
snd_pcm_status_t* status;
snd_pcm_status_alloca(&status);
if (ALSA_CALL(snd_pcm_status(handle, status), "Cannot get playback handle status") >= 0) {
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_SETUP) {
ERROR("Writing in state SND_PCM_STATE_SETUP, should be "
"SND_PCM_STATE_PREPARED or SND_PCM_STATE_RUNNING");
int error = snd_pcm_prepare(handle);
if (error < 0) {
ERROR("Failed to prepare handle: %s", snd_strerror(error));
stopPlaybackStream();
}
}
}
break;
}
default:
ERROR("Unknown write error, dropping frames: %s", snd_strerror(err));
stopPlaybackStream();
break;
}
}
static GstClockTime
gst_alsasrc_get_timestamp (GstAlsaSrc * asrc)
{
snd_pcm_status_t *status;
snd_htimestamp_t tstamp;
GstClockTime timestamp;
snd_pcm_uframes_t avail;
gint err = -EPIPE;
if (G_UNLIKELY (!asrc)) {
GST_ERROR_OBJECT (asrc, "No alsa handle created yet !");
return GST_CLOCK_TIME_NONE;
}
if (G_UNLIKELY (snd_pcm_status_malloc (&status) != 0)) {
GST_ERROR_OBJECT (asrc, "snd_pcm_status_malloc failed");
return GST_CLOCK_TIME_NONE;
}
if (G_UNLIKELY (snd_pcm_status (asrc->handle, status) != 0)) {
GST_ERROR_OBJECT (asrc, "snd_pcm_status failed");
return GST_CLOCK_TIME_NONE;
}
/* in case an xrun condition has occured we need to handle this */
if (snd_pcm_status_get_state (status) != SND_PCM_STATE_RUNNING) {
if (xrun_recovery (asrc, asrc->handle, err) < 0) {
GST_WARNING_OBJECT (asrc, "Could not recover from xrun condition !");
}
/* reload the status alsa status object, since recovery made it invalid */
if (G_UNLIKELY (snd_pcm_status (asrc->handle, status) != 0)) {
GST_ERROR_OBJECT (asrc, "snd_pcm_status failed");
}
}
/* get high resolution time stamp from driver */
snd_pcm_status_get_htstamp (status, &tstamp);
timestamp = GST_TIMESPEC_TO_TIME (tstamp);
/* max available frames sets the depth of the buffer */
avail = snd_pcm_status_get_avail (status);
/* calculate the timestamp of the next sample to be read */
timestamp -= gst_util_uint64_scale_int (avail, GST_SECOND, asrc->rate);
/* compensate for the fact that we really need the timestamp of the
* previously read data segment */
timestamp -= asrc->period_time * 1000;
snd_pcm_status_free (status);
GST_LOG_OBJECT (asrc, "ALSA timestamp : %" GST_TIME_FORMAT
", delay %lu", GST_TIME_ARGS (timestamp), avail);
return timestamp;
}
int ai_alsa_xrun(audio_in_t *ai)
{
snd_pcm_status_t *status;
int res;
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status(ai->alsa.handle, status))<0) {
mp_tmsg(MSGT_TV, MSGL_ERR, "ALSA status error: %s", snd_strerror(res));
return -1;
}
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
mp_tmsg(MSGT_TV, MSGL_ERR, "ALSA xrun!!! (at least %.3f ms long)\n",
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
if (mp_msg_test(MSGT_TV, MSGL_V)) {
mp_tmsg(MSGT_TV, MSGL_ERR, "ALSA Status:\n");
snd_pcm_status_dump(status, ai->alsa.log);
}
if ((res = snd_pcm_prepare(ai->alsa.handle))<0) {
mp_tmsg(MSGT_TV, MSGL_ERR, "ALSA xrun: prepare error: %s", snd_strerror(res));
return -1;
}
return 0; /* ok, data should be accepted again */
}
mp_tmsg(MSGT_TV, MSGL_ERR, "ALSA read/write error");
return -1;
}
static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
struct snd_pcm_status32 __user *src)
{
struct snd_pcm_status status;
int err;
err = snd_pcm_status(substream, &status);
if (err < 0)
return err;
if (put_user(status.state, &src->state) ||
put_user(status.trigger_tstamp.tv_sec, &src->trigger_tstamp.tv_sec) ||
put_user(status.trigger_tstamp.tv_nsec, &src->trigger_tstamp.tv_nsec) ||
put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
put_user(status.appl_ptr, &src->appl_ptr) ||
put_user(status.hw_ptr, &src->hw_ptr) ||
put_user(status.delay, &src->delay) ||
put_user(status.avail, &src->avail) ||
put_user(status.avail_max, &src->avail_max) ||
put_user(status.overrange, &src->overrange) ||
put_user(status.suspended_state, &src->suspended_state))
return -EFAULT;
return err;
}
static int snd_pcm_dmix_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
{
snd_pcm_direct_t *dmix = pcm->private_data;
memset(status, 0, sizeof(*status));
snd_pcm_status(dmix->spcm, status);
switch (dmix->state) {
case SNDRV_PCM_STATE_DRAINING:
case SNDRV_PCM_STATE_RUNNING:
snd_pcm_dmix_sync_ptr0(pcm, status->hw_ptr);
status->delay += snd_pcm_mmap_playback_delay(pcm)
+ status->avail - dmix->spcm->buffer_size;
break;
default:
break;
}
status->state = snd_pcm_dmix_state(pcm);
status->trigger_tstamp = dmix->trigger_tstamp;
status->avail = snd_pcm_mmap_playback_avail(pcm);
status->avail_max = status->avail > dmix->avail_max ? status->avail : dmix->avail_max;
dmix->avail_max = 0;
return 0;
}
int ai_alsa_xrun(audio_in_t *ai)
{
snd_pcm_status_t *status;
int res;
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status(ai->alsa.handle, status))<0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIALSA_AlsaStatusError, snd_strerror(res));
return -1;
}
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIALSA_AlsaXRUN,
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
if (mp_msg_test(MSGT_TV, MSGL_V)) {
mp_msg(MSGT_TV, MSGL_ERR, "ALSA Status:\n");
snd_pcm_status_dump(status, ai->alsa.log);
}
if ((res = snd_pcm_prepare(ai->alsa.handle))<0) {
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIALSA_AlsaXRUNPrepareError, snd_strerror(res));
return -1;
}
return 0; /* ok, data should be accepted again */
}
mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIALSA_AlsaReadWriteError);
return -1;
}
// I/O error handler
static void xrun(void)
{
snd_pcm_status_t *status;
int res;
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status(handle, status))<0) {
error(_("status error: %s"), snd_strerror(res));
exit(EXIT_FAILURE);
}
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
fprintf(stderr, _("%s!!! (at least %.3f ms long)\n"),
stream == SND_PCM_STREAM_PLAYBACK ? _("underrun") : _("overrun"),
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
if ((res = snd_pcm_prepare(handle))<0) {
error(_("xrun: prepare error: %s"), snd_strerror(res));
exit(EXIT_FAILURE);
}
return; // ok, data should be accepted again
} if (snd_pcm_status_get_state(status) == SND_PCM_STATE_DRAINING) {
}
error(_("read/write error, state = %s"), snd_pcm_state_name(snd_pcm_status_get_state(status)));
exit(EXIT_FAILURE);
}
uint32_t AudioStreamOutALSA::latency() const
{
int err;
int t;
snd_pcm_status_t *status;
snd_pcm_status_alloca(&status);
if(mHandle->handle == NULL) {
LOGV("handle is null, error !");
return 0;
}
if ((err = snd_pcm_status(mHandle->handle, status)) < 0) {
LOGV("stream status error :%s\n", snd_strerror(err));
return USEC_TO_MSEC (mHandle->latency);
}
t = snd_pcm_status_get_delay(status);
LOGV("snd_pcm_status_get_delay = %d", t);
LOGV("AudioStreamOutALSA::latency = %d, sampleRate = %d",
(t * 1000) / sampleRate(),
sampleRate());
return (t * 1000) / sampleRate();
}
static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
struct snd_pcm_status32 __user *src)
{
struct snd_pcm_status status;
int err;
err = snd_pcm_status(substream, &status);
if (err < 0)
return err;
if (clear_user(src, sizeof(*src)))
return -EFAULT;
if (put_user(status.state, &src->state) ||
compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
compat_put_timespec(&status.tstamp, &src->tstamp) ||
put_user(status.appl_ptr, &src->appl_ptr) ||
put_user(status.hw_ptr, &src->hw_ptr) ||
put_user(status.delay, &src->delay) ||
put_user(status.avail, &src->avail) ||
put_user(status.avail_max, &src->avail_max) ||
put_user(status.overrange, &src->overrange) ||
put_user(status.suspended_state, &src->suspended_state) ||
compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp))
return -EFAULT;
return err;
}
static void
xrun(void)
{
snd_pcm_status_t *status;
int res;
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status(AHandle, status)) < 0) {
fprintf(stderr, "status error: %s", snd_strerror(res));
exit(EXIT_FAILURE);
}
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
struct timeval now,
diff,
tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
fprintf(stderr, "Underrun!!! (at least %.3f ms long)\n",
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
if ((res = snd_pcm_prepare(AHandle)) < 0) {
fprintf(stderr, "xrun: prepare error: %s", snd_strerror(res));
exit(EXIT_FAILURE);
}
return; // ok, data should be accepted
// again
}
fprintf(stderr, "read/write error, state = %s",
snd_pcm_state_name(snd_pcm_status_get_state(status)));
exit(EXIT_FAILURE);
}
qint64 QAudioOutputPrivate::elapsedUSecs() const
{
if(!handle)
return 0;
if (deviceState == QAudio::StoppedState)
return 0;
#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
snd_pcm_status_t* status;
snd_pcm_status_alloca(&status);
snd_timestamp_t t1,t2;
if( snd_pcm_status(handle, status) >= 0) {
snd_pcm_status_get_tstamp(status,&t1);
snd_pcm_status_get_trigger_tstamp(status,&t2);
t1.tv_sec-=t2.tv_sec;
signed long l = (signed long)t1.tv_usec - (signed long)t2.tv_usec;
if(l < 0) {
t1.tv_sec--;
l = -l;
l %= 1000000;
}
return ((t1.tv_sec * 1000000)+l);
} else
return 0;
#else
return clockStamp.elapsed()*1000;
#endif
return 0;
}
static int log_state(ALSA_CARD *card) {
// log card state
snd_pcm_status_t *status;
snd_pcm_state_t state;
const char *state_str;
snd_pcm_status_alloca(&status);
snd_pcm_status(card->handle, status);
state = snd_pcm_status_get_state(status);
switch (state) {
case SND_PCM_STATE_RUNNING:
state_str = "running";
break;
case SND_PCM_STATE_XRUN:
state_str = "overrun";
break;
case SND_PCM_STATE_DRAINING:
state_str = "draining";
break;
case SND_PCM_STATE_PAUSED:
state_str = "paused";
break;
case SND_PCM_STATE_SUSPENDED:
state_str = "suspended";
break;
case SND_PCM_STATE_DISCONNECTED:
state_str = "disconnected";
break;
default:
state_str = "other";
}
log_msg("ALSA: state: %s [%d]\n", state_str, (int)state);
return state;
}
static void DumpDeviceStatus (vlc_object_t *obj, snd_pcm_t *pcm)
{
snd_pcm_status_t *status;
snd_pcm_status_alloca (&status);
snd_pcm_status (pcm, status);
Dump (obj, "current status:\n", snd_pcm_status_dump, status);
}
/* stolen from devposs */
static uint32_t gettimer(void)
{
long tmp=playpos;
int odelay;
if (busy++)
{
odelay=kernlen;
} else {
int err;
#ifdef ALSA_DEBUG
fprintf(stderr, "ALSA snd_pcm_status(alsa_pcm, alsa_pcm_status) = ");
#endif
if ((err=snd_pcm_status(alsa_pcm, alsa_pcm_status))<0)
{
#ifdef ALSA_DEBUG
fprintf(stderr, "failed: %s\n", snd_strerror(-err));
#endif
fprintf(stderr, "ALSA: snd_pcm_status() failed: %s\n", snd_strerror(-err));
odelay=kernlen;
} else {
#ifdef ALSA_DEBUG
fprintf(stderr, "ok\n");
fprintf(stderr, "snd_pcm_status_get_delay(alsa_pcm_status) = ");
#endif
odelay=snd_pcm_status_get_delay(alsa_pcm_status);
#ifdef ALSA_DEBUG
fprintf(stderr, "%i\n", odelay);
#endif
if (odelay<0) /* we ignore buffer-underruns */
odelay=0;
else if (odelay==0)
{
/* ALSA sometimes (atlast on Stians Ubuntu laptop) gives odelay==0 always */
odelay = snd_pcm_status_get_avail_max(alsa_pcm_status) - snd_pcm_status_get_avail(alsa_pcm_status);
if (odelay<0)
odelay=0;
}
odelay<<=(bit16+stereo);
if (odelay>kernlen)
{
odelay=kernlen;
} else if ((odelay<kernlen))
{
kernlen=odelay;
kernpos=(cachepos-kernlen+buflen)%buflen;
}
}
}
tmp-=odelay;
busy--;
return imuldiv(tmp, 65536>>(stereo+bit16), plrRate);
}
void gettimestamp(snd_pcm_t *handle, snd_timestamp_t *timestamp)
{
int err;
snd_pcm_status_t *status;
snd_pcm_status_alloca(&status);
if ((err = snd_pcm_status(handle, status)) < 0) {
printf("Stream status error: %s\n", snd_strerror(err));
exit(0);
}
snd_pcm_status_get_trigger_tstamp(status, timestamp);
}
static int
alsa_audio_deliver(audio_decoder_t *ad, int samples, int64_t pts, int epoch)
{
decoder_t *d = (decoder_t *)ad;
media_pipe_t *mp = ad->ad_mp;
int c;
retry:
c = snd_pcm_wait(d->h, 100);
if(c >= 0) {
c = snd_pcm_avail_update(d->h);
}
if(c == -EPIPE) {
snd_pcm_prepare(d->h);
usleep(100000);
TRACE(TRACE_DEBUG, "ALSA", "Audio underrun");
d->samples = 0;
goto retry;
}
c = MIN(d->max_frames_per_write, c);
uint8_t *planes[8] = {0};
planes[0] = d->tmp;
c = avresample_read(ad->ad_avr, planes, c);
snd_pcm_status_t *status;
int err;
snd_pcm_status_alloca(&status);
if ((err = snd_pcm_status(d->h, status)) >= 0) {
if(pts != AV_NOPTS_VALUE) {
snd_htimestamp_t hts;
snd_pcm_status_get_trigger_htstamp(status, &hts);
int64_t ts = hts.tv_sec * 1000000LL + hts.tv_nsec / 1000;
ts += d->samples * 1000000LL / ad->ad_out_sample_rate;
hts_mutex_lock(&mp->mp_clock_mutex);
mp->mp_audio_clock_avtime = ts;
mp->mp_audio_clock = pts;
mp->mp_audio_clock_epoch = epoch;
hts_mutex_unlock(&mp->mp_clock_mutex);
}
}
snd_pcm_sframes_t fr;
if(!snd_pcm_delay(d->h, &fr))
ad->ad_delay = 1000000L * fr / ad->ad_out_sample_rate;
c = snd_pcm_writei(d->h, d->tmp, c);
d->samples += c;
return 0;
}
void showstat(snd_pcm_t *handle, size_t frames)
{
int err;
snd_pcm_status_t *status;
snd_pcm_status_alloca(&status);
if ((err = snd_pcm_status(handle, status)) < 0) {
printf("Stream status error: %s\n", snd_strerror(err));
exit(0);
}
printf("*** frames = %li ***\n", (long)frames);
snd_pcm_status_dump(status, output);
}
/* more or less stolen from devposs */
static int getplaypos(void)
{
int retval;
if (busy++)
{
} else {
snd_pcm_sframes_t tmp;
int err;
#ifdef ALSA_DEBUG
fprintf(stderr, "ALSA snd_pcm_status(alsa_pcm, alsa_pcm_status) = ");
#endif
if ((err=snd_pcm_status(alsa_pcm, alsa_pcm_status))<0)
{
#ifdef ALSA_DEBUG
fprintf(stderr, "failed: %s\n", snd_strerror(-err));
#endif
fprintf(stderr, "ALSA: snd_pcm_status() failed: %s\n", snd_strerror(-err));
} else {
#ifdef ALSA_DEBUG
fprintf(stderr, "ok\n");
fprintf(stderr, "ALSA snd_pcm_status_get_delay(alsa_pcm_status = ");
#endif
tmp=snd_pcm_status_get_delay(alsa_pcm_status);
#ifdef ALSA_DEBUG
fprintf(stderr, "%ld\n", tmp);
#endif
tmp<<=(bit16+stereo);
if (tmp<0) /* we ignore buffer-underruns */
tmp=0;
else if (tmp==0)
{
/* ALSA sometimes (atlast on Stians Ubuntu laptop) gives odelay==0 always */
tmp = snd_pcm_status_get_avail_max(alsa_pcm_status) - snd_pcm_status_get_avail(alsa_pcm_status);
if (tmp<0)
tmp=0;
}
if (tmp>kernlen)
{
} else {
kernlen=tmp;
}
kernpos=(cachepos-kernlen+buflen)%buflen;
}
}
retval=kernpos;
busy--;
return retval;
}
void alsamm_showstat(snd_pcm_t *handle)
{
int err;
snd_pcm_status_t *status;
snd_output_t *output = NULL;
snd_pcm_status_alloca(&status);
if ((err = snd_pcm_status(handle, status)) < 0) {
check_error(err, "Get Stream status error");
return;
}
snd_pcm_status_dump(status, alsa_stdout);
}
static void *peeper(void *data)
{
int thread_no = (long)data;
snd_pcm_sframes_t val;
snd_pcm_status_t *stat;
snd_htimestamp_t tstamp;
int mode = running_mode, err;
snd_pcm_status_alloca(&stat);
while (running) {
if (running_mode == MODE_RANDOM)
mode = rand() % MODE_RANDOM;
switch (mode) {
case MODE_AVAIL_UPDATE:
val = snd_pcm_avail_update(pcm);
err = 0;
break;
case MODE_STATUS:
err = snd_pcm_status(pcm, stat);
val = snd_pcm_status_get_avail(stat);
break;
case MODE_HWSYNC:
err = snd_pcm_hwsync(pcm);
break;
case MODE_TIMESTAMP:
err = snd_pcm_htimestamp(pcm, (snd_pcm_uframes_t *)&val,
&tstamp);
break;
default:
err = snd_pcm_delay(pcm, &val);
break;
}
if (quiet)
continue;
if (running_mode == MODE_RANDOM) {
fprintf(stderr, "%d%c%s", thread_no, mode_suffix[mode],
err ? "!" : "");
} else {
if (show_value && mode != MODE_HWSYNC)
fprintf(stderr, "\r%d ", (int)val);
else
fprintf(stderr, "%d%s", thread_no,
err ? "!" : "");
}
}
return NULL;
}
/*----------------------------------------------------------------------
| AlsaOutput_GetStatus
+---------------------------------------------------------------------*/
BLT_METHOD
AlsaOutput_GetStatus(BLT_OutputNode* _self,
BLT_OutputNodeStatus* status)
{
AlsaOutput* self = ATX_SELF(AlsaOutput, BLT_OutputNode);
snd_pcm_status_t* pcm_status;
snd_pcm_sframes_t delay = 0;
int io_result;
/* default values */
status->media_time.seconds = 0;
status->media_time.nanoseconds = 0;
status->flags = 0;
/* get the driver status */
snd_pcm_status_alloca_no_assert(&pcm_status);
io_result = snd_pcm_status(self->device_handle, pcm_status);
if (io_result != 0) {
return BLT_FAILURE;
}
delay = snd_pcm_status_get_delay(pcm_status);
if (delay == 0) {
/* workaround buggy alsa drivers */
io_result = snd_pcm_delay(self->device_handle, &delay);
if (io_result != 0) {
return BLT_FAILURE;
}
}
if (delay > 0 && self->media_type.sample_rate) {
ATX_UInt64 media_time_samples = (self->next_media_time *
(ATX_UInt64)self->media_type.sample_rate)/
(ATX_UInt64)1000000000;
ATX_UInt64 media_time_ns;
if (delay <= (snd_pcm_sframes_t)media_time_samples) {
media_time_samples -= delay;
} else {
media_time_samples = 0;
}
media_time_ns = (media_time_samples*(ATX_UInt64)1000000000)/self->media_type.sample_rate;
status->media_time = BLT_TimeStamp_FromNanos(media_time_ns);
} else {
status->media_time = BLT_TimeStamp_FromNanos(self->next_media_time);
}
/* return the computed media time */
ATX_LOG_FINEST_3("delay = %lld samples, input port time = %lld, media time = %lld", (ATX_UInt64)delay, self->next_media_time, BLT_TimeStamp_ToNanos(status->media_time));
return BLT_SUCCESS;
}
/* I/O error handler */
static void xrun(void)
{
snd_pcm_status_t *status;
int res;
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status(handle, status))<0) {
error("status error: %s", snd_strerror(res));
exit(EXIT_FAILURE);
}
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
fprintf(stderr, "%s!!! (at least %.3f ms long)\n",
stream == SND_PCM_STREAM_PLAYBACK ? "underrun" : "overrun",
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
if (verbose) {
fprintf(stderr, "Status:\n");
snd_pcm_status_dump(status, log);
}
if ((res = snd_pcm_prepare(handle))<0) {
error("xrun: prepare error: %s", snd_strerror(res));
exit(EXIT_FAILURE);
}
return; /* ok, data should be accepted again */
} if (snd_pcm_status_get_state(status) == SND_PCM_STATE_DRAINING) {
if (verbose) {
fprintf(stderr, "Status(DRAINING):\n");
snd_pcm_status_dump(status, log);
}
if (stream == SND_PCM_STREAM_CAPTURE) {
fprintf(stderr, "capture stream format change? attempting recover...\n");
if ((res = snd_pcm_prepare(handle))<0) {
error("xrun(DRAINING): prepare error: %s", snd_strerror(res));
exit(EXIT_FAILURE);
}
return;
}
}
if (verbose) {
fprintf(stderr, "Status(R/W):\n");
snd_pcm_status_dump(status, log);
}
error("read/write error, state = %s", snd_pcm_state_name(snd_pcm_status_get_state(status)));
exit(EXIT_FAILURE);
}
/* how many byes are free in the buffer */
static int get_space(void)
{
snd_pcm_status_t *status;
int ret;
snd_pcm_status_alloca(&status);
if ((ret = snd_pcm_status(alsa_handler, status)) < 0)
{
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_CannotGetPcmStatus, snd_strerror(ret));
return 0;
}
ret = snd_pcm_status_get_avail(status) * bytes_per_sample;
if (ret > ao_data.buffersize) // Buffer underrun?
ret = ao_data.buffersize;
return ret;
}
/* how many byes are free in the buffer */
static int get_space(void)
{
snd_pcm_status_t *status;
int ret;
snd_pcm_status_alloca(&status);
if ((ret = snd_pcm_status(alsa_handler, status)) < 0)
{
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_CannotGetPcmStatus, snd_strerror(ret));
return(0);
}
ret = snd_pcm_status_get_avail(status) * bytes_per_sample;
if (ret > MAX_OUTBURST)
ret = MAX_OUTBURST;
return(ret);
}
static void alsa_resume(snd_pcm_t *handle){
int err;
snd_pcm_status_t *status=NULL;
snd_pcm_status_alloca(&status);
if ((err=snd_pcm_status(handle,status))!=0){
ms_warning("snd_pcm_status() failed: %s",snd_strerror(err));
return;
}
if (snd_pcm_status_get_state(status)==SND_PCM_STATE_SUSPENDED){
ms_warning("Maybe suspended, trying resume");
if ((err=snd_pcm_resume(handle))!=0){
if (err!=EWOULDBLOCK) ms_warning("snd_pcm_resume() failed: %s",snd_strerror(err));
}
}
}
static void
alsa_prefill( void )
{
snd_pcm_status_t *status;
char buf[512];
int frames, cnt;
snd_pcm_status_malloc( &status );
snd_pcm_status( alsa.pcm, status );
frames = snd_pcm_status_get_avail(status);
snd_pcm_status_free( status );
memset( buf, 0, sizeof(buf) );
cnt = sizeof(buf)/alsa.bpf;
for( ; frames > 0; frames -= cnt ) {
if( cnt > frames )
cnt = frames;
snd_pcm_writei( alsa.pcm, buf, sizeof(buf)/alsa.bpf );
}
}
static int ao_alsa_space(alsa_ctx_t *ctx)
{
snd_pcm_t *alsa_handle = (snd_pcm_t *) ctx->handle;
int ret;
snd_pcm_status_t *status;
int bytes_per_sample = ctx->bps * ctx->channels / 8;
snd_pcm_status_alloca(&status);
if ((ret = snd_pcm_status(alsa_handle, status)) < 0) {
dt_info("%s,%d: %s\n", __FUNCTION__, __LINE__, snd_strerror(ret));
return 0;
}
ret = snd_pcm_status_get_avail(status) * bytes_per_sample;
if (ret > ctx->buf_size) {
ret = ctx->buf_size;
}
return ret;
}
static void xrun(void)
{
snd_pcm_status_t *status;
int res;
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status(AHandle, status))<0) {
fprintf(stderr, "status error: %s", snd_strerror(res));
return;
}
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
if (monotonic) {
#ifdef HAVE_CLOCK_GETTIME
struct timespec now, diff, tstamp;
clock_gettime(CLOCK_MONOTONIC, &now);
snd_pcm_status_get_trigger_htstamp(status, &tstamp);
timermsub(&now, &tstamp, &diff);
fprintf(stderr, _("%s!!! (at least %.3f ms long)\n"),
stream == SND_PCM_STREAM_PLAYBACK ? _("underrun") : _("overrun"),
diff.tv_sec * 1000 + diff.tv_nsec / 10000000.0);
#else
fprintf(stderr, "%s !!!\n", "underrun");
#endif
} else {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
fprintf(stderr, "%s!!! (at least %.3f ms long)\n",
"Underrun",
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
}
if ((res = snd_pcm_prepare(AHandle))<0) {
fprintf(stderr, "xrun: prepare error: %s", snd_strerror(res)); /* we should probably die here */
return;
}
return; /* ok, data should be accepted again */
}
fprintf(stderr, "read/write error, state = %s", snd_pcm_state_name(snd_pcm_status_get_state(status)));
}
static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
struct snd_pcm_status_x32 __user *src,
bool ext)
{
struct snd_pcm_status status;
int err;
memset(&status, 0, sizeof(status));
/*
* with extension, parameters are read/write,
* get audio_tstamp_data from user,
* ignore rest of status structure
*/
if (ext && get_user(status.audio_tstamp_data,
(u32 __user *)(&src->audio_tstamp_data)))
return -EFAULT;
err = snd_pcm_status(substream, &status);
if (err < 0)
return err;
if (clear_user(src, sizeof(*src)))
return -EFAULT;
if (put_user(status.state, &src->state) ||
put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
put_timespec(&status.tstamp, &src->tstamp) ||
put_user(status.appl_ptr, &src->appl_ptr) ||
put_user(status.hw_ptr, &src->hw_ptr) ||
put_user(status.delay, &src->delay) ||
put_user(status.avail, &src->avail) ||
put_user(status.avail_max, &src->avail_max) ||
put_user(status.overrange, &src->overrange) ||
put_user(status.suspended_state, &src->suspended_state) ||
put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
return -EFAULT;
return err;
}
INT64 DAUDIO_GetBytePosition(void* id, int isSource, INT64 javaBytePos) {
AlsaPcmInfo* info = (AlsaPcmInfo*) id;
int ret;
INT64 result = javaBytePos;
snd_pcm_state_t state;
state = snd_pcm_state(info->handle);
if (state != SND_PCM_STATE_XRUN) {
#ifdef GET_POSITION_METHOD2
snd_timestamp_t* ts;
snd_pcm_uframes_t framesAvail;
// note: slight race condition if this is called simultaneously from 2 threads
ret = snd_pcm_status(info->handle, info->positionStatus);
if (ret != 0) {
ERROR1("ERROR in snd_pcm_status: %s\n", snd_strerror(ret));
result = javaBytePos;
} else {
// calculate from time value, or from available bytes
framesAvail = snd_pcm_status_get_avail(info->positionStatus);
result = estimatePositionFromAvail(info, isSource, javaBytePos, framesAvail * info->frameSize);
}
#endif
#ifdef GET_POSITION_METHOD3
snd_pcm_uframes_t framesAvail;
ret = snd_pcm_avail(info->handle, &framesAvail);
if (ret != 0) {
ERROR1("ERROR in snd_pcm_avail: %s\n", snd_strerror(ret));
result = javaBytePos;
} else {
result = estimatePositionFromAvail(info, isSource, javaBytePos, framesAvail * info->frameSize);
}
#endif
#ifdef GET_POSITION_METHOD1
result = estimatePositionFromAvail(info, isSource, javaBytePos, DAUDIO_GetAvailable(id, isSource));
#endif
}
//printf("getbyteposition: javaBytePos=%d , return=%d\n", (int) javaBytePos, (int) result);
return result;
}