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rsvgdec: use input buffer timings if possible

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SVG data may come through multiple buffers, so keep track of the
timestamp of the first buffer, and use it in preference.

https://bugzilla.gnome.org/show_bug.cgi?id=628284
This commit is contained in:
Vincent Penquerc'h 2011-08-18 13:21:18 +01:00 committed by Sebastian Dröge
parent 1ed91ad1db
commit e323efc353
2 changed files with 34 additions and 9 deletions
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41
ext/rsvg/gstrsvgdec.c
View file

@ -141,7 +141,7 @@ gst_rsvg_dec_reset (GstRsvgDec * dec)
dec->width = dec->height = 0;
dec->fps_n = 0;
dec->fps_d = 1;
dec->timestamp_offset = GST_CLOCK_TIME_NONE;
dec->first_timestamp = GST_CLOCK_TIME_NONE;
dec->frame_count = 0;
gst_segment_init (&dec->segment, GST_FORMAT_UNDEFINED);
@ -341,11 +341,18 @@ gst_rsvg_dec_chain (GstPad * pad, GstBuffer * buffer)
guint size;
gboolean ret = GST_FLOW_OK;
if (rsvg->timestamp_offset == GST_CLOCK_TIME_NONE) {
/* first_timestamp is used slightly differently where a framerate
is given or not.
If there is a frame rate, it will be used as a base.
If there is not, it will be used to keep track of the timestamp
of the first buffer, to be used as the timestamp of the output
buffer. When a buffer is output, first timestamp will resync to
the next buffer's timestamp. */
if (rsvg->first_timestamp == GST_CLOCK_TIME_NONE) {
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
rsvg->timestamp_offset = GST_BUFFER_TIMESTAMP (buffer);
else
rsvg->timestamp_offset = 0;
rsvg->first_timestamp = GST_BUFFER_TIMESTAMP (buffer);
else if (rsvg->fps_n != 0)
rsvg->first_timestamp = 0;
}
gst_adapter_push (rsvg->adapter, buffer);
@ -377,15 +384,33 @@ gst_rsvg_dec_chain (GstPad * pad, GstBuffer * buffer)
break;
if (rsvg->fps_n != 0) {
if (rsvg->first_timestamp != GST_CLOCK_TIME_NONE) {
GST_BUFFER_TIMESTAMP (outbuf) = rsvg->first_timestamp;
GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
GstClockTime end =
GST_BUFFER_TIMESTAMP_IS_VALID (buffer) ?
GST_BUFFER_TIMESTAMP (buffer) : rsvg->first_timestamp;
end += GST_BUFFER_DURATION (buffer);
GST_BUFFER_DURATION (outbuf) = end - GST_BUFFER_TIMESTAMP (outbuf);
}
if (rsvg->fps_n == 0) {
rsvg->first_timestamp = GST_CLOCK_TIME_NONE;
} else {
GST_BUFFER_DURATION (outbuf) =
gst_util_uint64_scale (rsvg->frame_count, rsvg->fps_d,
rsvg->fps_n * GST_SECOND);
}
} else if (rsvg->fps_n != 0) {
GST_BUFFER_TIMESTAMP (outbuf) =
rsvg->timestamp_offset + gst_util_uint64_scale (rsvg->frame_count,
rsvg->first_timestamp + gst_util_uint64_scale (rsvg->frame_count,
rsvg->fps_d, rsvg->fps_n * GST_SECOND);
GST_BUFFER_DURATION (outbuf) =
gst_util_uint64_scale (rsvg->frame_count, rsvg->fps_d,
rsvg->fps_n * GST_SECOND);
} else {
GST_BUFFER_TIMESTAMP (outbuf) = 0;
GST_BUFFER_TIMESTAMP (outbuf) = rsvg->first_timestamp;
GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
}
rsvg->frame_count++;

2
ext/rsvg/gstrsvgdec.h
View file

@ -58,7 +58,7 @@ struct _GstRsvgDec
GstTagList *pending_tags;
gint fps_n, fps_d;
GstClockTime timestamp_offset;
GstClockTime first_timestamp;
guint64 frame_count;
GstSegment segment;