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videorate: Make videorate work with a live source

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Add a property that makes videorate skip to the first buffer it
receives instead of padding the stream from segment start to the
first real buffer.

Fixes bug #567928.
This commit is contained in:
Olivier Crête 2009-09-11 07:36:10 +02:00 committed by Sebastian Dröge
parent 445311bff4
commit f35c5bc1e7
2 changed files with 24 additions and 2 deletions
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25
gst/videorate/gstvideorate.c
View file

@ -92,6 +92,7 @@ enum
#define DEFAULT_SILENT TRUE
#define DEFAULT_NEW_PREF 1.0
#define DEFAULT_SKIP_TO_FIRST FALSE
enum
{
@ -102,7 +103,8 @@ enum
ARG_DROP,
ARG_SILENT,
ARG_NEW_PREF,
/* FILL ME */
ARG_SKIP_TO_FIRST
/* FILL ME */
};
static GstStaticPadTemplate gst_video_rate_src_template =
@ -183,6 +185,10 @@ gst_video_rate_class_init (GstVideoRateClass * klass)
g_param_spec_double ("new-pref", "New Pref",
"Value indicating how much to prefer new frames (unused)", 0.0, 1.0,
DEFAULT_NEW_PREF, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, ARG_SKIP_TO_FIRST,
g_param_spec_boolean ("skip-to-first", "Skip to first buffer",
"Don't produce buffers before the first one we receive",
DEFAULT_SKIP_TO_FIRST, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
element_class->change_state = gst_video_rate_change_state;
}
@ -667,7 +673,16 @@ gst_video_rate_chain (GstPad * pad, GstBuffer * buffer)
if (!GST_CLOCK_TIME_IS_VALID (videorate->next_ts)) {
/* new buffer, we expect to output a buffer that matches the first
* timestamp in the segment */
videorate->next_ts = videorate->segment.start + videorate->segment.accum;
if (videorate->skip_to_first) {
videorate->next_ts = in_ts;
videorate->segment_out = gst_util_uint64_scale (in_ts,
videorate->to_rate_numerator,
videorate->to_rate_denominator * GST_SECOND) -
(videorate->segment.accum + videorate->segment.start);
} else {
videorate->next_ts =
videorate->segment.start + videorate->segment.accum;
}
}
} else {
GstClockTime prevtime;
@ -791,6 +806,9 @@ gst_video_rate_set_property (GObject * object,
case ARG_NEW_PREF:
videorate->new_pref = g_value_get_double (value);
break;
case ARG_SKIP_TO_FIRST:
videorate->skip_to_first = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -822,6 +840,9 @@ gst_video_rate_get_property (GObject * object,
case ARG_NEW_PREF:
g_value_set_double (value, videorate->new_pref);
break;
case ARG_SKIP_TO_FIRST:
g_value_set_boolean (value, videorate->skip_to_first);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;

1
gst/videorate/gstvideorate.h
View file

@ -66,6 +66,7 @@ struct _GstVideoRate
guint64 in, out, dup, drop;
gboolean silent;
gdouble new_pref;
gboolean skip_to_first;
};
struct _GstVideoRateClass