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audio: Add stream align API for getting timestamp at discont and number of samples since discont

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=787560
This commit is contained in:
Sebastian Dröge 2017-09-13 16:23:26 +03:00
parent d2fd740388
commit bf68e74403
4 changed files with 79 additions and 23 deletions
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2
docs/libs/gst-plugins-base-libs-sections.txt
View file

@ -250,6 +250,8 @@ gst_audio_stream_align_copy
gst_audio_stream_align_free
gst_audio_stream_align_mark_discont
gst_audio_stream_align_process
gst_audio_stream_align_get_samples_since_discont
gst_audio_stream_align_get_timestamp_at_discont
gst_audio_stream_align_get_alignment_threshold
gst_audio_stream_align_set_alignment_threshold
gst_audio_stream_align_get_discont_wait

46
gst-libs/gst/audio/gstaudiostreamalign.c
View file

@ -50,6 +50,8 @@ struct _GstAudioStreamAlign
/* counter to keep track of timestamps */
guint64 next_offset;
GstClockTime timestamp_at_discont;
guint64 samples_since_discont;
/* Last time we noticed a discont */
GstClockTime discont_time;
@ -90,6 +92,8 @@ gst_audio_stream_align_new (gint rate, GstClockTime alignment_threshold,
align->alignment_threshold = alignment_threshold;
align->discont_wait = discont_wait;
align->timestamp_at_discont = GST_CLOCK_TIME_NONE;
align->samples_since_discont = 0;
gst_audio_stream_align_mark_discont (align);
return align;
@ -264,6 +268,44 @@ gst_audio_stream_align_mark_discont (GstAudioStreamAlign * align)
align->discont_time = GST_CLOCK_TIME_NONE;
}
/**
* gst_audio_stream_align_get_timestamp_at_discont:
* @align: a #GstAudioStreamAlign
*
* Timestamp that was passed when a discontinuity was detected, i.e. the first
* timestamp after the discontinuity.
*
* Returns: The last timestamp at when a discontinuity was detected
*
* Since: 1.14
*/
GstClockTime
gst_audio_stream_align_get_timestamp_at_discont (GstAudioStreamAlign * align)
{
g_return_val_if_fail (align != NULL, GST_CLOCK_TIME_NONE);
return align->timestamp_at_discont;
}
/**
* gst_audio_stream_align_get_samples_since_discont:
* @align: a #GstAudioStreamAlign
*
* Returns the number of samples that were processed since the last
* discontinuity was detected.
*
* Returns: The number of samples processed since the last discontinuity.
*
* Since: 1.14
*/
guint64
gst_audio_stream_align_get_samples_since_discont (GstAudioStreamAlign * align)
{
g_return_val_if_fail (align != NULL, 0);
return align->samples_since_discont;
}
/**
* gst_audio_stream_align_process:
* @align: a #GstAudioStreamAlign
@ -363,6 +405,8 @@ gst_audio_stream_align_process (GstAudioStreamAlign * align,
G_GUINT64_FORMAT ", got %" G_GUINT64_FORMAT,
align->next_offset, start_offset);
align->next_offset = align->rate > 0 ? end_offset : start_offset;
align->timestamp_at_discont = start_time;
align->samples_since_discont = 0;
/* Got a discont and adjusted, reset the discont_time marker */
align->discont_time = GST_CLOCK_TIME_NONE;
@ -399,6 +443,8 @@ gst_audio_stream_align_process (GstAudioStreamAlign * align,
}
}
align->samples_since_discont += n_samples;
if (out_timestamp)
*out_timestamp = timestamp;
if (out_duration)

52
gst-libs/gst/audio/gstaudiostreamalign.h
View file

@ -29,46 +29,52 @@
typedef struct _GstAudioStreamAlign GstAudioStreamAlign;
GST_EXPORT
GType gst_audio_stream_align_get_type (void);
GType gst_audio_stream_align_get_type (void);
GST_EXPORT
GstAudioStreamAlign * gst_audio_stream_align_new (gint rate,
GstClockTime alignment_threshold,
GstClockTime discont_wait);
GstAudioStreamAlign * gst_audio_stream_align_new (gint rate,
GstClockTime alignment_threshold,
GstClockTime discont_wait);
GST_EXPORT
GstAudioStreamAlign * gst_audio_stream_align_copy (const GstAudioStreamAlign * align);
GstAudioStreamAlign * gst_audio_stream_align_copy (const GstAudioStreamAlign * align);
GST_EXPORT
void gst_audio_stream_align_free (GstAudioStreamAlign * align);
void gst_audio_stream_align_free (GstAudioStreamAlign * align);
GST_EXPORT
void gst_audio_stream_align_set_rate (GstAudioStreamAlign * align,
gint rate);
void gst_audio_stream_align_set_rate (GstAudioStreamAlign * align,
gint rate);
GST_EXPORT
gint gst_audio_stream_align_get_rate (GstAudioStreamAlign * align);
gint gst_audio_stream_align_get_rate (GstAudioStreamAlign * align);
GST_EXPORT
void gst_audio_stream_align_set_alignment_threshold (GstAudioStreamAlign * align,
GstClockTime alignment_threshold);
void gst_audio_stream_align_set_alignment_threshold (GstAudioStreamAlign * align,
GstClockTime alignment_threshold);
GST_EXPORT
GstClockTime gst_audio_stream_align_get_alignment_threshold (GstAudioStreamAlign * align);
GstClockTime gst_audio_stream_align_get_alignment_threshold (GstAudioStreamAlign * align);
GST_EXPORT
void gst_audio_stream_align_set_discont_wait (GstAudioStreamAlign * align,
GstClockTime discont_wait);
void gst_audio_stream_align_set_discont_wait (GstAudioStreamAlign * align,
GstClockTime discont_wait);
GST_EXPORT
GstClockTime gst_audio_stream_align_get_discont_wait (GstAudioStreamAlign * align);
GstClockTime gst_audio_stream_align_get_discont_wait (GstAudioStreamAlign * align);
GST_EXPORT
void gst_audio_stream_align_mark_discont (GstAudioStreamAlign * align);
void gst_audio_stream_align_mark_discont (GstAudioStreamAlign * align);
GST_EXPORT
gboolean gst_audio_stream_align_process (GstAudioStreamAlign * align,
gboolean discont,
GstClockTime timestamp,
guint n_samples,
GstClockTime *out_timestamp,
GstClockTime *out_duration,
guint64 *out_sample_position);
GstClockTime gst_audio_stream_align_get_timestamp_at_discont (GstAudioStreamAlign * align);
GST_EXPORT
guint64 gst_audio_stream_align_get_samples_since_discont (GstAudioStreamAlign * align);
GST_EXPORT
gboolean gst_audio_stream_align_process (GstAudioStreamAlign * align,
gboolean discont,
GstClockTime timestamp,
guint n_samples,
GstClockTime *out_timestamp,
GstClockTime *out_duration,
guint64 *out_sample_position);
#endif /* __GST_AUDIO_STREAM_ALIGN_H__ */

2
win32/common/libgstaudio.def
View file

@ -214,6 +214,8 @@ EXPORTS
gst_audio_stream_align_get_alignment_threshold
gst_audio_stream_align_get_discont_wait
gst_audio_stream_align_get_rate
gst_audio_stream_align_get_samples_since_discont
gst_audio_stream_align_get_timestamp_at_discont
gst_audio_stream_align_get_type
gst_audio_stream_align_mark_discont
gst_audio_stream_align_new