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baseaudiosink: make discont-wait configurable
Now we can configure how much time to wait before deciding that a discont has happened. Also, adds getter and setter to allow derived implementations to set this value upon construction. Suggestions and several improvements by Havard Graff. Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
This commit is contained in:
Felipe Contreras
Wim Taymans
parent
0a111bf26e
commit
3df415d4c7
2 changed files with 97 additions and 16 deletions
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@ -62,12 +62,15 @@ struct _GstBaseAudioSinkPrivate
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* before resyncing */
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guint64 drift_tolerance;
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/* time of the previous detected discont candidate */
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GstClockTime discont_time;
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/* number of nanoseconds we allow timestamps to drift
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* before resyncing */
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GstClockTime alignment_threshold;
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/* time of the previous detected discont candidate */
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GstClockTime discont_time;
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/* number of nanoseconds to wait until creating a discontinuity */
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GstClockTime discont_wait;
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};
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/* BaseAudioSink signals and args */
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@ -86,13 +89,17 @@ enum
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/* FIXME, enable pull mode when clock slaving and trick modes are figured out */
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#define DEFAULT_CAN_ACTIVATE_PULL FALSE
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/* when timestamps drift for more than 40ms we resync. This should
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* be anough to compensate for timestamp rounding errors. */
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#define DEFAULT_ALIGNMENT_THRESHOLD (40 * GST_MSECOND)
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/* when clock slaving drift for more than 40ms we resync. This is
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* a reasonable default */
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#define DEFAULT_DRIFT_TOLERANCE ((40 * GST_MSECOND) / GST_USECOND)
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/* when timestamps drift for more than 40ms we resync. This should
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* be anough to compensate for timestamp rounding errors. */
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#define DEFAULT_ALIGNMENT_THRESHOLD (40 * GST_MSECOND)
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/* allow for one second before resyncing to see if the timestamps drift will
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* fix itself, or is a permanent offset */
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#define DEFAULT_DISCONT_WAIT (1 * GST_SECOND)
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enum
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{
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@ -103,8 +110,9 @@ enum
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PROP_PROVIDE_CLOCK,
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PROP_SLAVE_METHOD,
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PROP_CAN_ACTIVATE_PULL,
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PROP_DRIFT_TOLERANCE,
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PROP_ALIGNMENT_THRESHOLD,
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PROP_DRIFT_TOLERANCE,
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PROP_DISCONT_WAIT,
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PROP_LAST
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};
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@ -252,6 +260,19 @@ gst_base_audio_sink_class_init (GstBaseAudioSinkClass * klass)
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G_MAXINT64, DEFAULT_ALIGNMENT_THRESHOLD,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstBaseAudioSink:discont-wait
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*
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* A window of time in nanoseconds to wait before creating a discontinuity as
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* a result of breaching the drift-tolerance.
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*/
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g_object_class_install_property (gobject_class, PROP_DISCONT_WAIT,
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g_param_spec_int64 ("discont-wait", "Discont Wait",
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"Window of time in nanoseconds to wait before "
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"creating a discontinuity", 0,
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G_MAXINT64, DEFAULT_DISCONT_WAIT,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_base_audio_sink_change_state);
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gstelement_class->provide_clock =
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@ -292,6 +313,7 @@ gst_base_audio_sink_init (GstBaseAudioSink * baseaudiosink,
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baseaudiosink->priv->slave_method = DEFAULT_SLAVE_METHOD;
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baseaudiosink->priv->drift_tolerance = DEFAULT_DRIFT_TOLERANCE;
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baseaudiosink->priv->alignment_threshold = DEFAULT_ALIGNMENT_THRESHOLD;
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baseaudiosink->priv->discont_wait = DEFAULT_DISCONT_WAIT;
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baseaudiosink->provided_clock = gst_audio_clock_new ("GstAudioSinkClock",
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(GstAudioClockGetTimeFunc) gst_base_audio_sink_get_time, baseaudiosink);
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@ -729,6 +751,50 @@ gst_base_audio_sink_get_alignment_threshold (GstBaseAudioSink * sink)
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return result;
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}
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/**
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* gst_base_audio_sink_set_discont_wait:
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* @sink: a #GstBaseAudioSink
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* @discont_wait: the new discont wait in nanoseconds
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*
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* Controls how long the sink will wait before creating a discontinuity.
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*
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* Since: 0.10.31
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*/
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void
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gst_base_audio_sink_set_discont_wait (GstBaseAudioSink * sink,
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GstClockTime discont_wait)
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{
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g_return_if_fail (GST_IS_BASE_AUDIO_SINK (sink));
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GST_OBJECT_LOCK (sink);
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sink->priv->discont_wait = discont_wait;
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GST_OBJECT_UNLOCK (sink);
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}
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/**
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* gst_base_audio_sink_get_discont_wait
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* @sink: a #GstBaseAudioSink
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*
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* Get the current discont wait, in nanoseconds, used by @sink.
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*
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* Returns: The current discont wait used by @sink.
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*
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* Since: 0.10.31
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*/
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GstClockTime
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gst_base_audio_sink_get_discont_wait (GstBaseAudioSink * sink)
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{
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GstClockTime result;
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g_return_val_if_fail (GST_IS_BASE_AUDIO_SINK (sink), -1);
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GST_OBJECT_LOCK (sink);
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result = sink->priv->discont_wait;
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GST_OBJECT_UNLOCK (sink);
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return result;
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}
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static void
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gst_base_audio_sink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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@ -760,6 +826,9 @@ gst_base_audio_sink_set_property (GObject * object, guint prop_id,
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gst_base_audio_sink_set_alignment_threshold (sink,
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g_value_get_uint64 (value));
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break;
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case PROP_DISCONT_WAIT:
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gst_base_audio_sink_set_discont_wait (sink, g_value_get_uint64 (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -797,6 +866,9 @@ gst_base_audio_sink_get_property (GObject * object, guint prop_id,
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g_value_set_uint64 (value,
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gst_base_audio_sink_get_alignment_threshold (sink));
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break;
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case PROP_DISCONT_WAIT:
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g_value_set_uint64 (value, gst_base_audio_sink_get_discont_wait (sink));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -1443,17 +1515,21 @@ gst_base_audio_sink_get_alignment (GstBaseAudioSink * sink,
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if (sample_diff > headroom && align < 0)
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allow_align = FALSE;
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/* wait before deciding to make a discontinuity */
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if (G_UNLIKELY (sample_diff >= max_sample_diff)) {
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GstClockTime time = gst_util_uint64_scale_int (sample_offset,
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GST_SECOND, ringbuf->spec.rate);
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if (sink->priv->discont_time == -1) {
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/* discont candidate */
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sink->priv->discont_time = time;
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} else if (time - sink->priv->discont_time >= GST_SECOND) {
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/* one second passed, discontinuity detected */
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/* wait before deciding to make a discontinuity */
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if (sink->priv->discont_wait > 0) {
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GstClockTime time = gst_util_uint64_scale_int (sample_offset,
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GST_SECOND, ringbuf->spec.rate);
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if (sink->priv->discont_time == -1) {
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/* discont candidate */
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sink->priv->discont_time = time;
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} else if (time - sink->priv->discont_time >= sink->priv->discont_wait) {
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/* discont_wait expired, discontinuity detected */
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discont = TRUE;
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sink->priv->discont_time = -1;
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}
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} else {
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discont = TRUE;
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sink->priv->discont_time = -1;
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}
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} else if (G_UNLIKELY (sink->priv->discont_time != -1)) {
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/* we have had a discont, but are now back on track! */
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@ -185,6 +185,11 @@ void gst_base_audio_sink_set_alignment_threshold (GstBaseAudioSink * sink,
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GstClockTime
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gst_base_audio_sink_get_alignment_threshold (GstBaseAudioSink * sink);
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void gst_base_audio_sink_set_discont_wait (GstBaseAudioSink * sink,
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GstClockTime discont_wait);
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GstClockTime
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gst_base_audio_sink_get_discont_wait (GstBaseAudioSink * sink);
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G_END_DECLS
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#endif /* __GST_BASE_AUDIO_SINK_H__ */
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