static void
gst_opensles_sink_init (GstOpenSLESSink * sink, GstOpenSLESSinkClass * gclass)
{
sink->volume = DEFAULT_VOLUME;
sink->mute = DEFAULT_MUTE;
_opensles_query_capabilities (sink);
gst_base_audio_sink_set_provide_clock (GST_BASE_AUDIO_SINK (sink), TRUE);
/* Override some default values to fit on the AudioFlinger behaviour of
* processing 20ms buffers as minimum buffer size. */
GST_BASE_AUDIO_SINK (sink)->buffer_time = 400000;
GST_BASE_AUDIO_SINK (sink)->latency_time = 20000;
}
static void
gst_opensles_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstOpenSLESSink *sink = GST_OPENSLES_SINK (object);
GstRingBuffer *rb = GST_BASE_AUDIO_SINK (sink)->ringbuffer;
switch (prop_id) {
case PROP_VOLUME:
sink->volume = g_value_get_double (value);
if (rb && GST_IS_OPENSLES_RING_BUFFER (rb)) {
gst_opensles_ringbuffer_set_volume (rb, sink->volume);
}
break;
case PROP_MUTE:
sink->mute = g_value_get_boolean (value);
if (rb && GST_IS_OPENSLES_RING_BUFFER (rb)) {
gst_opensles_ringbuffer_set_mute (rb, sink->mute);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static boolean
gst_directsound_sink_is_spdif_format (GstDirectSoundSink * dsoundsink)
{
GstBufferFormatType type;
type = GST_BASE_AUDIO_SINK (dsoundsink)->ringbuffer->spec.type;
return type == GST_BUFTYPE_AC3 || type == GST_BUFTYPE_DTS;
}
/* initialize the new element
* instantiate pads and add them to element
* set functions
* initialize structure
*/
static void
gst_osx_audio_sink_init (GstOsxAudioSink * sink, GstOsxAudioSinkClass * gclass)
{
/* GstElementClass *klass = GST_ELEMENT_GET_CLASS (sink); */
sink->ringbuffer = NULL;
GST_DEBUG ("Initialising object");
gst_osx_audio_sink_create_ringbuffer (GST_BASE_AUDIO_SINK (sink));
}
/* Called with the write_mutex held */
static void
gst_sunaudio_sink_do_delay (GstSunAudioSink * sink)
{
GstBaseAudioSink *ba_sink = GST_BASE_AUDIO_SINK (sink);
GstClockTime total_sleep;
GstClockTime max_sleep;
gint sleep_usecs;
GTimeVal sleep_end;
gint err;
audio_info_t ainfo;
guint diff;
/* This code below ensures that we don't race any further than buffer_time
* ahead of the audio output, by sleeping if the next write call would cause
* us to advance too far in the ring-buffer */
LOOP_WHILE_EINTR (err, ioctl (sink->fd, AUDIO_GETINFO, &ainfo));
if (err < 0)
goto write_error;
/* Compute our offset from the output (copes with overflow) */
diff = (guint) (sink->segs_written) - ainfo.play.eof;
if (diff > sink->segtotal) {
/* This implies that reset did a flush just as the sound device aquired
* some buffers internally, and it causes us to be out of sync with the
* eof measure. This corrects it */
sink->segs_written = ainfo.play.eof;
diff = 0;
}
if (diff + 1 < sink->segtotal)
return; /* no need to sleep at all */
/* Never sleep longer than the initial number of undrained segments in the
device plus one */
total_sleep = 0;
max_sleep = (diff + 1) * (ba_sink->latency_time * GST_USECOND);
/* sleep for a segment period between .eof polls */
sleep_usecs = ba_sink->latency_time;
/* Current time is our reference point */
g_get_current_time (&sleep_end);
/* If the next segment would take us too far along the ring buffer,
* sleep for a bit to free up a slot. If there were a way to find out
* when the eof field actually increments, we could use, but the only
* notification mechanism seems to be SIGPOLL, which we can't use from
* a support library */
while (diff + 1 >= sink->segtotal && total_sleep < max_sleep) {
GST_LOG_OBJECT (sink, "need to block to drain segment(s). "
"Sleeping for %d us", sleep_usecs);
g_time_val_add (&sleep_end, sleep_usecs);
if (g_cond_timed_wait (sink->sleep_cond, sink->write_mutex, &sleep_end)) {
GST_LOG_OBJECT (sink, "Waking up early due to reset");
return; /* Got told to wake up */
}
total_sleep += (sleep_usecs * GST_USECOND);
LOOP_WHILE_EINTR (err, ioctl (sink->fd, AUDIO_GETINFO, &ainfo));
if (err < 0)
goto write_error;
/* Compute our (new) offset from the output (copes with overflow) */
diff = (guint) g_atomic_int_get (&sink->segs_written) - ainfo.play.eof;
}
return;
write_error:
GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, (NULL),
("Playback error on device '%s': %s", sink->device, strerror (errno)));
return;
}
