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API: gst_base_src_query_latency(). Added method so that subclasses can easily get the latency values of the base sour...

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Original commit message from CVS:
* docs/libs/gstreamer-libs-sections.txt:
* libs/gst/base/gstbasesrc.c: (gst_base_src_query_latency),
(gst_base_src_default_query), (gst_base_src_get_range):
* libs/gst/base/gstbasesrc.h:
API: gst_base_src_query_latency(). Added method so that subclasses can
easily get the latency values of the base source class.
This commit is contained in:
Wim Taymans 2007-05-03 14:54:34 +00:00
parent 2c3ba9c734
commit 60f3a9de93
4 changed files with 57 additions and 7 deletions
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9
ChangeLog
View file

@ -1,3 +1,12 @@
2007-05-03 Wim Taymans <wim@fluendo.com>
* docs/libs/gstreamer-libs-sections.txt:
* libs/gst/base/gstbasesrc.c: (gst_base_src_query_latency),
(gst_base_src_default_query), (gst_base_src_get_range):
* libs/gst/base/gstbasesrc.h:
API: gst_base_src_query_latency(). Added method so that subclasses can
easily get the latency values of the base source class.
2007-05-02 Zaheer Abbas Merali <<zaheerabbas at merali dot org>>
* tools/gst-inspect.c (print_implementation_info):

1
docs/libs/gstreamer-libs-sections.txt
View file

@ -154,6 +154,7 @@ gst_base_src_wait_playing
gst_base_src_is_live
gst_base_src_set_live
gst_base_src_set_format
gst_base_src_query_latency
GST_BASE_SRC_PAD
<SUBSECTION Standard>

50
libs/gst/base/gstbasesrc.c
View file

@ -546,6 +546,40 @@ gst_base_src_set_format (GstBaseSrc * src, GstFormat format)
gst_segment_init (&src->segment, format);
}
/**
* gst_base_src_query_latency:
* @src: the source
* @live: if the source is live
* @min_latency: the min latency of the source
* @max_latency: the max latency of the source
*
* Query the source for the latency parameters. @live will be TRUE when @src is
* configured as a live source. @min_latency will be set as the latency between
* calling the create function and the timestamp on the resulting buffer.
* @max_latency is always the undefined value of -1.
*
* This function is mostly used by subclasses.
*
* Returns: TRUE if the query succeeded.
*
* Since: 0.10.13
*/
gboolean
gst_base_src_query_latency (GstBaseSrc * src, gboolean * live,
GstClockTime * min_latency, GstClockTime * max_latency)
{
GST_LIVE_LOCK (src);
if (live)
*live = src->is_live;
if (min_latency)
*min_latency = 0;
if (max_latency)
*max_latency = -1;
GST_LIVE_UNLOCK (src);
return TRUE;
}
static gboolean
gst_base_src_setcaps (GstPad * pad, GstCaps * caps)
{
@ -740,14 +774,16 @@ gst_base_src_default_query (GstBaseSrc * src, GstQuery * query)
break;
}
case GST_QUERY_LATENCY:
/* we can only report the fact that we are live or not, we know nothing
* about latency. Subclasses should override and implement something
* usefull */
GST_LIVE_LOCK (src);
gst_query_set_latency (query, src->is_live, 0, -1);
GST_LIVE_UNLOCK (src);
res = TRUE;
{
GstClockTime min, max;
gboolean live;
/* Subclasses should override and implement something usefull */
res = gst_base_src_query_latency (src, &live, &min, &max);
gst_query_set_latency (query, live, min, max);
break;
}
case GST_QUERY_JITTER:
case GST_QUERY_RATE:
default:

4
libs/gst/base/gstbasesrc.h
View file

@ -237,6 +237,10 @@ gboolean gst_base_src_is_live (GstBaseSrc *src);
void gst_base_src_set_format (GstBaseSrc *src, GstFormat format);
gboolean gst_base_src_query_latency (GstBaseSrc *src, gboolean * live,
GstClockTime * min_latency,
GstClockTime * max_latency);
G_END_DECLS
#endif /* __GST_BASE_SRC_H__ */