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gst-libs/gst/audio/gstbaseaudiosink.c: Report the latency with the new seglatency parameter.

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Original commit message from CVS:
* gst-libs/gst/audio/gstbaseaudiosink.c:
(gst_base_audio_sink_query):
Report the latency with the new seglatency parameter.
* gst-libs/gst/audio/gstringbuffer.c:
(gst_ring_buffer_debug_spec_buff), (gst_ring_buffer_parse_caps),
(gst_ring_buffer_acquire):
* gst-libs/gst/audio/gstringbuffer.h:
Add new field to the ringbufferspec to specify the expected latency
between the underlying device read/write pointer, this is needed
when writing sinks that sit a little closer to the hardware.
Add some more docs for other fields.
This commit is contained in:
Wim Taymans 2008-05-07 15:47:03 +00:00
parent 8c3b00be4d
commit 09f7dee84d
4 changed files with 44 additions and 7 deletions
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15
ChangeLog
View file

@ -1,3 +1,18 @@
2008-05-07 Wim Taymans <wim.taymans@collabora.co.uk>
* gst-libs/gst/audio/gstbaseaudiosink.c:
(gst_base_audio_sink_query):
Report the latency with the new seglatency parameter.
* gst-libs/gst/audio/gstringbuffer.c:
(gst_ring_buffer_debug_spec_buff), (gst_ring_buffer_parse_caps),
(gst_ring_buffer_acquire):
* gst-libs/gst/audio/gstringbuffer.h:
Add new field to the ringbufferspec to specify the expected latency
between the underlying device read/write pointer, this is needed
when writing sinks that sit a little closer to the hardware.
Add some more docs for other fields.
2008-05-06 Sebastian Dröge <slomo@circular-chaos.org>
* gst/volume/gstvolume.c: (volume_transform_ip):

2
gst-libs/gst/audio/gstbaseaudiosink.c
View file

@ -333,7 +333,7 @@ gst_base_audio_sink_query (GstElement * element, GstQuery * query)
basesink->priv->us_latency = min_l;
min_latency =
gst_util_uint64_scale_int (spec->segtotal * spec->segsize,
gst_util_uint64_scale_int (spec->seglatency * spec->segsize,
GST_SECOND, spec->rate * spec->bytes_per_sample);
/* we cannot go lower than the buffer size and the min peer latency */

9
gst-libs/gst/audio/gstringbuffer.c
View file

@ -258,6 +258,7 @@ gst_ring_buffer_debug_spec_buff (GstRingBufferSpec * spec)
GST_DEBUG ("acquire ringbuffer: latency time: %" G_GINT64_FORMAT " usec",
spec->latency_time);
GST_DEBUG ("acquire ringbuffer: total segments: %d", spec->segtotal);
GST_DEBUG ("acquire ringbuffer: latency segments: %d", spec->seglatency);
GST_DEBUG ("acquire ringbuffer: segment size: %d bytes = %d samples",
spec->segsize, spec->segsize / spec->bytes_per_sample);
GST_DEBUG ("acquire ringbuffer: buffer size: %d bytes = %d samples",
@ -414,6 +415,9 @@ gst_ring_buffer_parse_caps (GstRingBufferSpec * spec, GstCaps * caps)
spec->segsize -= spec->segsize % spec->bytes_per_sample;
spec->segtotal = spec->buffer_time / spec->latency_time;
/* leave the latency undefined now, implementations can change it but if it's
* not changed, we assume the same value as segtotal */
spec->seglatency = -1;
gst_ring_buffer_debug_spec_caps (spec);
gst_ring_buffer_debug_spec_buff (spec);
@ -649,6 +653,11 @@ gst_ring_buffer_acquire (GstRingBuffer * buf, GstRingBufferSpec * spec)
if (G_UNLIKELY ((bps = buf->spec.bytes_per_sample) == 0))
goto invalid_bps;
/* if the seglatency was overwritten with something else than -1, use it, else
* assume segtotal as the latency */
if (buf->spec.seglatency == -1)
buf->spec.seglatency = buf->spec.segtotal;
segsize = buf->spec.segsize;
buf->samples_per_seg = segsize / bps;

25
gst-libs/gst/audio/gstringbuffer.h
View file

@ -200,17 +200,30 @@ struct _GstRingBufferSpec
gint rate;
gint channels;
guint64 latency_time; /* the required/actual latency time */
guint64 buffer_time; /* the required/actual time of the buffer */
gint segsize; /* size of one buffer segment in bytes */
gint segtotal; /* total number of segments */
guint64 latency_time; /* the required/actual latency time, this is the
* actual the size of one segment and the
* minimum possible latency we can achieve. */
guint64 buffer_time; /* the required/actual time of the buffer, this is
* the total size of the buffer and maximum
* latency we can compensate for. */
gint segsize; /* size of one buffer segment in bytes, this value
* should be chosen to match latency_time as
* well as possible. */
gint segtotal; /* total number of segments, this value is the
* number of segments of @segsize and should be
* chosen so that it matches buffer_time as
* close as possible. */
/* out */
gint bytes_per_sample; /* number of bytes of one sample */
guint8 silence_sample[32]; /* bytes representing silence */
/* ABI added 0.10.20 */
gint seglatency; /* number of segments queued in the lower
* level device, defaults to segtotal. */
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
/* gpointer _gst_reserved[GST_PADDING]; */
guint8 _gst_reserved[(sizeof (gpointer) * GST_PADDING) - sizeof (gint)];
};
#define GST_RING_BUFFER_GET_COND(buf) (((GstRingBuffer *)buf)->cond)