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gst-libs/gst/audio/: Cleanups.

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Original commit message from CVS:
* gst-libs/gst/audio/gstbaseaudiosink.c:
(gst_base_audio_sink_render):
* gst-libs/gst/audio/gstbaseaudiosrc.c:
(gst_base_audio_src_create):
* gst-libs/gst/audio/gstringbuffer.c: (gst_ring_buffer_commit),
(gst_ring_buffer_read):
Cleanups.
Commit and read from ringbuffer in samples rather than bytes.
This commit is contained in:
Wim Taymans 2005-10-11 18:32:01 +00:00
parent 0c71c6348f
commit 5c17d94013
4 changed files with 90 additions and 44 deletions
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11
ChangeLog
View file

@ -1,3 +1,14 @@
2005-10-11 Wim Taymans <wim@fluendo.com>
* gst-libs/gst/audio/gstbaseaudiosink.c:
(gst_base_audio_sink_render):
* gst-libs/gst/audio/gstbaseaudiosrc.c:
(gst_base_audio_src_create):
* gst-libs/gst/audio/gstringbuffer.c: (gst_ring_buffer_commit),
(gst_ring_buffer_read):
Cleanups.
Commit and read from ringbuffer in samples rather than bytes.
2005-10-11 Wim Taymans <wim@fluendo.com>
* gst-libs/gst/audio/gstbaseaudiosink.c:

57
gst-libs/gst/audio/gstbaseaudiosink.c
View file

@ -340,21 +340,36 @@ static GstFlowReturn
gst_base_audio_sink_render (GstBaseSink * bsink, GstBuffer * buf)
{
guint64 render_offset, in_offset;
GstClockTime time, render_time;
GstClockTime time, render_time, duration;
GstClockTimeDiff render_diff;
GstBaseAudioSink *sink = GST_BASE_AUDIO_SINK (bsink);
GstBaseAudioSink *sink;
GstRingBuffer *ringbuf;
gint64 diff;
guint8 *data;
guint size;
guint samples;
gint bps;
sink = GST_BASE_AUDIO_SINK (bsink);
ringbuf = sink->ringbuffer;
/* can't do anything when we don't have the device */
if (!gst_ring_buffer_is_acquired (sink->ringbuffer))
if (!gst_ring_buffer_is_acquired (ringbuf))
goto wrong_state;
bps = ringbuf->spec.bytes_per_sample;
size = GST_BUFFER_SIZE (buf);
if (size % bps != 0)
goto wrong_size;
samples = size / bps;
in_offset = GST_BUFFER_OFFSET (buf);
time = GST_BUFFER_TIMESTAMP (buf);
duration = GST_BUFFER_DURATION (buf);
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
GST_DEBUG ("time %" GST_TIME_FORMAT ", offset %llu, start %" GST_TIME_FORMAT,
GST_TIME_ARGS (time), in_offset, GST_TIME_ARGS (bsink->segment_start));
@ -376,34 +391,42 @@ gst_base_audio_sink_render (GstBaseSink * bsink, GstBuffer * buf)
/* add base time to get absolute clock time */
render_time += gst_element_get_base_time (GST_ELEMENT (bsink));
/* and bring the time to the offset in the buffer */
render_offset = render_time * sink->ringbuffer->spec.rate / GST_SECOND;
render_offset = render_time * ringbuf->spec.rate / GST_SECOND;
/* roundoff errors in timestamp conversion */
if (sink->next_sample != -1)
diff = ABS ((gint64) render_offset - (gint64) sink->next_sample);
else
diff = sink->ringbuffer->spec.rate;
diff = ringbuf->spec.rate;
GST_DEBUG ("render time %" GST_TIME_FORMAT
", render offset %llu, diff %lld, size %lu", GST_TIME_ARGS (render_time),
render_offset, diff, size);
", render offset %llu, diff %lld, samples %lu",
GST_TIME_ARGS (render_time), render_offset, diff, samples);
/* we tollerate a 10th of a second diff before we start resyncing. This
* should be enough to compensate for various rounding errors in the timestamp
* and sample offset position. */
if (diff < sink->ringbuffer->spec.rate / DIFF_TOLERANCE) {
if (diff < ringbuf->spec.rate / DIFF_TOLERANCE) {
GST_DEBUG ("align with prev sample, %" G_GINT64_FORMAT " < %lu", diff,
sink->ringbuffer->spec.rate / DIFF_TOLERANCE);
ringbuf->spec.rate / DIFF_TOLERANCE);
/* just align with previous sample then */
render_offset = sink->next_sample;
} else {
GST_DEBUG ("resync");
}
gst_ring_buffer_commit (sink->ringbuffer, render_offset, data, size);
/* clip length based on rate */
samples /= ABS (bsink->segment_rate);
/* the next sample should be current sample and its length */
sink->next_sample =
render_offset + size / sink->ringbuffer->spec.bytes_per_sample;
sink->next_sample = render_offset + samples;
gst_ring_buffer_commit (ringbuf, render_offset, data, samples);
if (time + duration >= bsink->segment_stop) {
GST_DEBUG ("start playback because we are at the end of segment");
gst_ring_buffer_start (ringbuf);
}
return GST_FLOW_OK;
@ -414,6 +437,14 @@ wrong_state:
("sink not negotiated."), ("sink not negotiated."));
return GST_FLOW_NOT_NEGOTIATED;
}
wrong_size:
{
GST_DEBUG ("wrong size");
GST_ELEMENT_ERROR (sink, RESOURCE, NOT_FOUND,
("sink received buffer of wrong size."),
("sink received buffer of wrong size."));
return GST_FLOW_ERROR;
}
}
GstRingBuffer *

8
gst-libs/gst/audio/gstbaseaudiosrc.c
View file

@ -308,7 +308,7 @@ gst_base_audio_src_create (GstPushSrc * psrc, GstBuffer ** outbuf)
GstBaseAudioSrc *src = GST_BASE_AUDIO_SRC (psrc);
GstBuffer *buf;
guchar *data;
guint len;
guint len, samples;
guint res;
guint64 sample;
@ -326,11 +326,13 @@ gst_base_audio_src_create (GstPushSrc * psrc, GstBuffer ** outbuf)
sample = 0;
}
res = gst_ring_buffer_read (src->ringbuffer, sample, data, len);
samples = len / src->ringbuffer->spec.bytes_per_sample;
res = gst_ring_buffer_read (src->ringbuffer, sample, data, samples);
if (res == -1)
goto stopped;
src->next_sample = sample + len / src->ringbuffer->spec.bytes_per_sample;
src->next_sample = sample + samples;
gst_buffer_set_caps (buf, GST_PAD_CAPS (GST_BASE_SRC_PAD (psrc)));

58
gst-libs/gst/audio/gstringbuffer.c
View file

@ -904,7 +904,7 @@ not_started:
* @buf: the #GstRingBuffer to commit
* @sample: the sample position of the data
* @data: the data to commit
* @len: the length of the data to commit
* @len: the number of samples in the data to commit
*
* Commit @len samples pointed to by @data to the ringbuffer
* @buf. The first sample should be written at position @sample in
@ -936,15 +936,15 @@ gst_ring_buffer_commit (GstRingBuffer * buf, guint64 sample, guchar * data,
bps = buf->spec.bytes_per_sample;
sps = buf->samples_per_seg;
/* write out all bytes */
/* write out all samples */
while (len > 0) {
gint writelen;
gint writeseg, writeoff;
gint sampleslen;
gint writeseg, sampleoff;
/* figure out the segment and the offset inside the segment where
* the sample should be written. */
writeseg = sample / sps;
writeoff = (sample % sps) * bps;
sampleoff = (sample % sps);
while (TRUE) {
gint diff;
@ -957,13 +957,13 @@ gst_ring_buffer_commit (GstRingBuffer * buf, guint64 sample, guchar * data,
GST_DEBUG
("pointer at %d, sample %llu, write to %d-%d, len %d, diff %d, segtotal %d, segsize %d",
segdone, sample, writeseg, writeoff, len, diff, segtotal, segsize);
segdone, sample, writeseg, sampleoff, len, diff, segtotal, sps);
/* segment too far ahead, we need to drop */
if (diff < 0) {
/* we need to drop one segment at a time, pretend we wrote a
* segment. */
writelen = MIN (segsize, len);
sampleslen = MIN (sps, len);
goto next;
}
@ -979,17 +979,18 @@ gst_ring_buffer_commit (GstRingBuffer * buf, guint64 sample, guchar * data,
/* we can write now */
writeseg = writeseg % segtotal;
writelen = MIN (segsize - writeoff, len);
sampleslen = MIN (sps - sampleoff, len);
GST_DEBUG ("write @%p seg %d, off %d, len %d",
dest + writeseg * segsize, writeseg, writeoff, writelen);
dest + writeseg * segsize, writeseg, sampleoff, sampleslen);
memcpy (dest + writeseg * segsize + writeoff, data, writelen);
memcpy (dest + (writeseg * segsize) + (sampleoff * bps), data,
(sampleslen * bps));
next:
len -= writelen;
data += writelen;
sample += writelen / bps;
len -= sampleslen;
sample += sampleslen;
data += sampleslen * bps;
}
return len;
@ -1007,9 +1008,9 @@ not_started:
* @buf: the #GstRingBuffer to read from
* @sample: the sample position of the data
* @data: where the data should be read
* @len: the length of the data to read
* @len: the number of samples in data to read
*
* Read @length samples from the ringbuffer into the memory pointed
* Read @len samples from the ringbuffer into the memory pointed
* to by @data.
* The first sample should be read from position @sample in
* the ringbuffer.
@ -1040,15 +1041,15 @@ gst_ring_buffer_read (GstRingBuffer * buf, guint64 sample, guchar * data,
bps = buf->spec.bytes_per_sample;
sps = buf->samples_per_seg;
/* read enough bytes */
/* read enough samples */
while (len > 0) {
gint readlen;
gint readseg, readoff;
gint sampleslen;
gint readseg, sampleoff;
/* figure out the segment and the offset inside the segment where
* the sample should be written. */
readseg = sample / sps;
readoff = (sample % sps) * bps;
sampleoff = (sample % sps);
while (TRUE) {
gint diff;
@ -1061,14 +1062,14 @@ gst_ring_buffer_read (GstRingBuffer * buf, guint64 sample, guchar * data,
GST_DEBUG
("pointer at %d, sample %llu, read from %d-%d, len %d, diff %d, segtotal %d, segsize %d",
segdone, sample, readseg, readoff, len, diff, segtotal, segsize);
segdone, sample, readseg, sampleoff, len, diff, segtotal, segsize);
/* segment too far ahead, we need to drop */
if (diff < 0) {
/* we need to drop one segment at a time, pretend we read an
* empty segment. */
readlen = MIN (segsize, len);
memcpy (data, buf->empty_seg, readlen);
sampleslen = MIN (sps, len);
memcpy (data, buf->empty_seg, sampleslen * bps);
goto next;
}
@ -1084,17 +1085,18 @@ gst_ring_buffer_read (GstRingBuffer * buf, guint64 sample, guchar * data,
/* we can read now */
readseg = readseg % segtotal;
readlen = MIN (segsize - readoff, len);
sampleslen = MIN (sps - sampleoff, len);
GST_DEBUG ("read @%p seg %d, off %d, len %d",
dest + readseg * segsize, readseg, readoff, readlen);
dest + readseg * segsize, readseg, sampleoff, sampleslen);
memcpy (data, dest + readseg * segsize + readoff, readlen);
memcpy (data, dest + (readseg * segsize) + (sampleoff * bps),
(sampleslen * bps));
next:
len -= readlen;
data += readlen;
sample += readlen / bps;
len -= sampleslen;
sample += sampleslen;
data += sampleslen * bps;
}
return len;