audiobasesink: Fix incorrect/missing custom slaving method documentation

https://bugzilla.gnome.org/show_bug.cgi?id=754199

docs/libs/gst-plugins-base-libs-sections.txt

@@ -435,6 +435,8 @@ GST_AUDIO_BASE_SRC_CAST
 GstAudioBaseSink
 GstAudioBaseSinkClass
 GstAudioBaseSinkSlaveMethod
+GstAudioBaseSinkDiscontReason
+GstAudioBaseSinkCustomSlavingCallback
 
 GST_AUDIO_BASE_SINK_CLOCK
 GST_AUDIO_BASE_SINK_PAD
@@ -449,6 +451,8 @@ gst_audio_base_sink_set_alignment_threshold
 gst_audio_base_sink_get_alignment_threshold
 gst_audio_base_sink_set_discont_wait
 gst_audio_base_sink_get_discont_wait
+gst_audio_base_sink_set_custom_slaving_callback
+gst_audio_base_sink_report_device_failure
 <SUBSECTION Standard>
 GST_AUDIO_BASE_SINK
 GST_IS_AUDIO_BASE_SINK

gst-libs/gst/audio/gstaudiobasesink.h

@@ -107,12 +107,12 @@ typedef struct _GstAudioBaseSinkPrivate GstAudioBaseSinkPrivate;
 
 /**
  * GstAudioBaseSinkDiscontReason:
- * GST_AUDIO_BASE_SINK_DISCONT_REASON_NO_DISCONT: No discontinuity occurred
+ * @GST_AUDIO_BASE_SINK_DISCONT_REASON_NO_DISCONT: No discontinuity occurred
- * GST_AUDIO_BASE_SINK_DISCONT_REASON_NEW_CAPS: New caps are set, causing renegotiotion
+ * @GST_AUDIO_BASE_SINK_DISCONT_REASON_NEW_CAPS: New caps are set, causing renegotiotion
- * GST_AUDIO_BASE_SINK_DISCONT_REASON_FLUSH: Samples have been flushed
+ * @GST_AUDIO_BASE_SINK_DISCONT_REASON_FLUSH: Samples have been flushed
- * GST_AUDIO_BASE_SINK_DISCONT_REASON_SYNC_LATENCY: Sink was synchronized to the estimated latency (occurs during initialization)
+ * @GST_AUDIO_BASE_SINK_DISCONT_REASON_SYNC_LATENCY: Sink was synchronized to the estimated latency (occurs during initialization)
- * GST_AUDIO_BASE_SINK_DISCONT_REASON_ALIGNMENT: Aligning buffers failed because the timestamps are too discontinuous
+ * @GST_AUDIO_BASE_SINK_DISCONT_REASON_ALIGNMENT: Aligning buffers failed because the timestamps are too discontinuous
- * GST_AUDIO_BASE_SINK_DISCONT_REASON_DEVICE_FAILURE: Audio output device experienced and recovered from an error but introduced latency in the process (see also @gst_audio_base_sink_report_device_failure)
+ * @GST_AUDIO_BASE_SINK_DISCONT_REASON_DEVICE_FAILURE: Audio output device experienced and recovered from an error but introduced latency in the process (see also @gst_audio_base_sink_report_device_failure())
  *
  * Different possible reasons for discontinuities. This enum is useful for the custom
  * slave method.
@@ -135,25 +135,27 @@ typedef enum
  * @etime: external clock time
  * @itime: internal clock time
  * @requested_skew: skew amount requested by the callback
- * @discont_reason: TRUE if there was a discontinuity in the average skew
+ * @discont_reason: reason for discontinuity (if any)
  * @user_data: user data
  *
  * This function is set with gst_audio_base_sink_set_custom_slaving_callback()
  * and is called during playback. It receives the current time of external and
  * internal clocks, which the callback can then use to apply any custom
- * slaving/synchronization schemes. The external clock is the sink's element clock,
+ * slaving/synchronization schemes.
- * the internal one is the internal audio clock. The internal audio clock's
+ *
- * calibration is applied to the timestamps before they are passed to the
+ * The external clock is the sink's element clock, the internal one is the
- * callback. The difference between etime and itime is the skew; how much
+ * internal audio clock. The internal audio clock's calibration is applied to
- * internal and external clock lie apart from each other. A skew of 0 means
+ * the timestamps before they are passed to the callback. The difference between
- * both clocks are perfectly in sync. itime > etime means the external clock
+ * etime and itime is the skew; how much internal and external clock lie apart
- * is going slower, while itime < etime means it is going faster than the
+ * from each other. A skew of 0 means both clocks are perfectly in sync.
- * internal clock. etime and itime are always valid timestamps, except for when
+ * itime > etime means the external clock is going slower, while itime < etime
- * discont is set to TRUE.
+ * means it is going faster than the internal clock. etime and itime are always
- * requested_skew is an output value the callback can write to. It informs the sink
+ * valid timestamps, except for when a discontinuity happens.
- * of whether or not it should move the playout pointer, and if so, by how much.
+ *
- * This pointer is only NULL if discont is true; otherwise, it is safe to write
+ * requested_skew is an output value the callback can write to. It informs the
- * to *requested_skew. The default skew is 0.
+ * sink of whether or not it should move the playout pointer, and if so, by how
+ * much. This pointer is only NULL if a discontinuity occurs; otherwise, it is
+ * safe to write to *requested_skew. The default skew is 0.
  *
  * The sink may experience discontinuities. If one happens, discont is TRUE,
  * itime, etime are set to GST_CLOCK_TIME_NONE, and requested_skew is NULL.