mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2025-02-17 11:45:25 +00:00
Code Issues 1 Projects Releases Wiki Activity

ext/vorbis/vorbisdec.c: Small cleanups.

Browse source 
Original commit message from CVS:
* ext/vorbis/vorbisdec.c: (vorbis_dec_src_query),
(vorbis_dec_src_event), (vorbis_dec_sink_event), (vorbis_do_clip),
(vorbis_dec_push), (vorbis_handle_data_packet), (vorbis_dec_chain),
(vorbis_dec_change_state):
Small cleanups.
Add some FIXMEs
Clip output samples to segment boundaries.
This commit is contained in:
Wim Taymans 2006-05-26 15:52:23 +00:00
parent 63bd38cd2b
commit 696dd6e320
2 changed files with 115 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
ChangeLog
View file

@ -1,3 +1,13 @@
2006-05-26 Wim Taymans <wim@fluendo.com>
* ext/vorbis/vorbisdec.c: (vorbis_dec_src_query),
(vorbis_dec_src_event), (vorbis_dec_sink_event), (vorbis_do_clip),
(vorbis_dec_push), (vorbis_handle_data_packet), (vorbis_dec_chain),
(vorbis_dec_change_state):
Small cleanups.
Add some FIXMEs
Clip output samples to segment boundaries.
2006-05-26 Jan Schmidt <thaytan@mad.scientist.com>
* sys/ximage/ximagesink.c: (gst_ximagesink_ximage_new),

118
ext/vorbis/vorbisdec.c
View file

@ -334,14 +334,19 @@ vorbis_dec_src_query (GstPad * pad, GstQuery * query)
}
case GST_QUERY_DURATION:
{
/* query peer for total length */
if (!gst_pad_is_linked (dec->sinkpad)) {
GstPad *peer;
if (!(peer = gst_pad_get_peer (dec->sinkpad))) {
GST_WARNING_OBJECT (dec, "sink pad %" GST_PTR_FORMAT " is not linked",
dec->sinkpad);
goto error;
}
if (!(res = gst_pad_query (GST_PAD_PEER (dec->sinkpad), query)))
res = gst_pad_query (peer, query);
gst_object_unref (peer);
if (!res)
goto error;
break;
}
case GST_QUERY_CONVERT:
@ -421,7 +426,8 @@ vorbis_dec_src_event (GstPad * pad, GstEvent * event)
dec = GST_VORBIS_DEC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
case GST_EVENT_SEEK:
{
GstFormat format, tformat;
gdouble rate;
GstEvent *real_seek;
@ -512,6 +518,12 @@ vorbis_dec_sink_event (GstPad * pad, GstEvent * event)
if (rate <= 0.0)
goto newseg_wrong_rate;
GST_DEBUG_OBJECT (dec,
"newsegment: update %d, rate %g, arate %g, start %" GST_TIME_FORMAT
", stop %" GST_TIME_FORMAT ", time %" GST_TIME_FORMAT,
update, rate, arate, GST_TIME_ARGS (start), GST_TIME_ARGS (stop),
GST_TIME_ARGS (time));
/* now configure the values */
gst_segment_set_newsegment_full (&dec->segment, update,
rate, arate, format, start, stop, time);
@ -752,6 +764,61 @@ copy_samples (float *out, float **in, guint samples, gint channels)
#endif
}
/* clip output samples to the segment boundaries
*/
static gboolean
vorbis_do_clip (GstVorbisDec * dec, GstBuffer * buf)
{
gint64 start, stop, cstart, cstop, diff;
guint size;
start = GST_BUFFER_TIMESTAMP (buf);
stop = start + GST_BUFFER_DURATION (buf);
size = GST_BUFFER_SIZE (buf);
if (!gst_segment_clip (&dec->segment, GST_FORMAT_TIME,
start, stop, &cstart, &cstop))
goto clipped;
/* see if some clipping happened */
diff = cstart - start;
if (diff > 0) {
GST_BUFFER_TIMESTAMP (buf) = cstart;
GST_BUFFER_DURATION (buf) -= diff;
/* bring clipped time to samples */
diff = gst_util_uint64_scale_int (diff, dec->vi.rate, GST_SECOND);
/* samples to bytes */
diff *= (sizeof (float) * dec->vi.channels);
GST_DEBUG_OBJECT (dec, "clipping start to %" GST_TIME_FORMAT " %"
G_GUINT64_FORMAT " bytes", GST_TIME_ARGS (cstart), diff);
GST_BUFFER_DATA (buf) += diff;
GST_BUFFER_SIZE (buf) -= diff;
}
diff = stop - cstop;
if (diff > 0) {
GST_BUFFER_DURATION (buf) -= diff;
/* bring clipped time to samples and then to bytes */
diff = gst_util_uint64_scale_int (diff, dec->vi.rate, GST_SECOND);
diff *= (sizeof (float) * dec->vi.channels);
GST_DEBUG_OBJECT (dec, "clipping stop to %" GST_TIME_FORMAT " %"
G_GUINT64_FORMAT " bytes", GST_TIME_ARGS (cstop), diff);
GST_BUFFER_SIZE (buf) -= diff;
}
return FALSE;
/* dropped buffer */
clipped:
{
GST_DEBUG_OBJECT (dec, "clipped buffer");
gst_buffer_unref (buf);
return TRUE;
}
}
static GstFlowReturn
vorbis_dec_push (GstVorbisDec * dec, GstBuffer * buf)
{
@ -787,6 +854,11 @@ vorbis_dec_push (GstVorbisDec * dec, GstBuffer * buf)
for (walk = dec->queued; walk; walk = g_list_next (walk)) {
GstBuffer *buffer = GST_BUFFER (walk->data);
/* clips or returns FALSE with buffer unreffed when completely
* clipped */
if (vorbis_do_clip (dec, buffer))
continue;
if (dec->discont) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
dec->discont = FALSE;
@ -797,6 +869,11 @@ vorbis_dec_push (GstVorbisDec * dec, GstBuffer * buf)
g_list_free (dec->queued);
dec->queued = NULL;
}
/* clip */
if (vorbis_do_clip (dec, buf))
return GST_FLOW_OK;
if (dec->discont) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
dec->discont = FALSE;
@ -819,7 +896,20 @@ vorbis_handle_data_packet (GstVorbisDec * vd, ogg_packet * packet)
if (!vd->initialized)
goto not_initialized;
/* FIXME, we should queue undecoded packets here until we get
* a timestamp, then we reverse timestamp the queued packets and
* clip them, then we decode only the ones we want and don't
* keep decoded data in memory.
* Ideally, of course, the demuxer gives us a valid timestamp on
* the first packet.
*/
/* normal data packet */
/* FIXME, we can skip decoding if the packet is outside of the
* segment, this is however not very trivial as we need a previous
* packet to decode the current one so we must be carefull not to
* throw away too much. For now we decode everything and clip right
* before pushing data. */
if (G_UNLIKELY (vorbis_synthesis (&vd->vb, packet)))
goto could_not_read;
@ -923,6 +1013,8 @@ vorbis_dec_chain (GstPad * pad, GstBuffer * buffer)
GstVorbisDec *vd;
ogg_packet packet;
GstFlowReturn result = GST_FLOW_OK;
GstClockTime timestamp;
guint64 offset_end;
vd = GST_VORBIS_DEC (gst_pad_get_parent (pad));
@ -938,14 +1030,16 @@ vorbis_dec_chain (GstPad * pad, GstBuffer * buffer)
vd->discont = TRUE;
}
timestamp = GST_BUFFER_TIMESTAMP (buffer);
offset_end = GST_BUFFER_OFFSET_END (buffer);
/* only ogg has granulepos, demuxers of other container formats
* might provide us with timestamps instead (e.g. matroskademux) */
if (GST_BUFFER_OFFSET_END (buffer) == GST_BUFFER_OFFSET_NONE &&
GST_BUFFER_TIMESTAMP (buffer) != GST_CLOCK_TIME_NONE) {
if (offset_end == GST_BUFFER_OFFSET_NONE && timestamp != GST_CLOCK_TIME_NONE) {
/* we might get multiple consecutive buffers with the same timestamp */
if (GST_BUFFER_TIMESTAMP (buffer) != vd->prev_timestamp) {
vd->cur_timestamp = GST_BUFFER_TIMESTAMP (buffer);
vd->prev_timestamp = GST_BUFFER_TIMESTAMP (buffer);
if (timestamp != vd->prev_timestamp) {
vd->cur_timestamp = timestamp;
vd->prev_timestamp = timestamp;
}
} else {
vd->cur_timestamp = GST_CLOCK_TIME_NONE;
@ -955,7 +1049,7 @@ vorbis_dec_chain (GstPad * pad, GstBuffer * buffer)
/* make ogg_packet out of the buffer */
packet.packet = GST_BUFFER_DATA (buffer);
packet.bytes = GST_BUFFER_SIZE (buffer);
packet.granulepos = GST_BUFFER_OFFSET_END (buffer);
packet.granulepos = offset_end;
packet.packetno = 0; /* we don't care */
/*
* FIXME. Is there anyway to know that this is the last packet and
@ -982,8 +1076,7 @@ vorbis_dec_chain (GstPad * pad, GstBuffer * buffer)
result = vorbis_handle_data_packet (vd, &packet);
}
GST_DEBUG_OBJECT (vd, "offset end: %" G_GINT64_FORMAT,
(gint64) GST_BUFFER_OFFSET_END (buffer));
GST_DEBUG_OBJECT (vd, "offset end: %" G_GUINT64_FORMAT, offset_end);
done:
gst_buffer_unref (buffer);
@ -1007,7 +1100,6 @@ vorbis_dec_change_state (GstElement * element, GstStateChange transition)
GstVorbisDec *vd = GST_VORBIS_DEC (element);
GstStateChangeReturn res;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;