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videorate: optionally only drop frames to ensure maximum frame rate

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This adds option to arrange for maximal allowed variable frame rate.

Fixes #628764.
This commit is contained in:
Alexey Fisher 2011-04-29 14:58:02 +02:00 committed by Mark Nauwelaerts
parent 4ba6acdba5
commit 1e09272024
2 changed files with 32 additions and 4 deletions
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35
gst/videorate/gstvideorate.c
View file

@ -86,6 +86,7 @@ enum
#define DEFAULT_SILENT TRUE
#define DEFAULT_NEW_PREF 1.0
#define DEFAULT_SKIP_TO_FIRST FALSE
#define DEFAULT_DROP_ONLY FALSE
enum
{
@ -96,7 +97,8 @@ enum
ARG_DROP,
ARG_SILENT,
ARG_NEW_PREF,
ARG_SKIP_TO_FIRST
ARG_SKIP_TO_FIRST,
ARG_DROP_ONLY
/* FILL ME */
};
@ -199,6 +201,18 @@ gst_video_rate_class_init (GstVideoRateClass * klass)
"Don't produce buffers before the first one we receive",
DEFAULT_SKIP_TO_FIRST, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstVideoRate:drop-only:
*
* Only drop frames, no duplicates are produced.
*
* Since: 0.10.34
*/
g_object_class_install_property (object_class, ARG_DROP_ONLY,
g_param_spec_boolean ("drop-only", "Only Drop",
"Only drop frames, no duplicates are produced",
DEFAULT_DROP_ONLY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
element_class->change_state = GST_DEBUG_FUNCPTR (gst_video_rate_change_state);
}
@ -450,6 +464,7 @@ gst_video_rate_init (GstVideoRate * videorate, GstVideoRateClass * klass)
gst_video_rate_reset (videorate);
videorate->silent = DEFAULT_SILENT;
videorate->new_pref = DEFAULT_NEW_PREF;
videorate->drop_only = DEFAULT_DROP_ONLY;
videorate->from_rate_numerator = 0;
videorate->from_rate_denominator = 0;
@ -501,9 +516,11 @@ gst_video_rate_flush_prev (GstVideoRate * videorate, gboolean duplicate)
GST_BUFFER_DURATION (outbuf) = videorate->next_ts - push_ts;
}
/* adapt for looping, bring back to time in current segment. */
GST_BUFFER_TIMESTAMP (outbuf) = push_ts - videorate->segment.accum;
/* We do not need to update time in VFR (variable frame rate) mode */
if (!videorate->drop_only) {
/* adapt for looping, bring back to time in current segment. */
GST_BUFFER_TIMESTAMP (outbuf) = push_ts - videorate->segment.accum;
}
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (videorate->srcpad));
GST_LOG_OBJECT (videorate,
@ -867,6 +884,10 @@ gst_video_rate_chain (GstPad * pad, GstBuffer * buffer)
goto done;
}
}
/* Do not produce any dups. We can exit loop now */
if (videorate->drop_only)
break;
/* continue while the first one was the best, if they were equal avoid
* going into an infinite loop */
}
@ -937,6 +958,9 @@ gst_video_rate_set_property (GObject * object,
case ARG_SKIP_TO_FIRST:
videorate->skip_to_first = g_value_get_boolean (value);
break;
case ARG_DROP_ONLY:
videorate->drop_only = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -971,6 +995,9 @@ gst_video_rate_get_property (GObject * object,
case ARG_SKIP_TO_FIRST:
g_value_set_boolean (value, videorate->skip_to_first);
break;
case ARG_DROP_ONLY:
g_value_set_boolean (value, videorate->drop_only);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;

1
gst/videorate/gstvideorate.h
View file

@ -71,6 +71,7 @@ struct _GstVideoRate
gboolean silent;
gdouble new_pref;
gboolean skip_to_first;
gboolean drop_only;
};
struct _GstVideoRateClass