diff options
Diffstat (limited to 'gst/videomaxrate/videomaxrate.c')
| -rw-r--r-- | gst/videomaxrate/videomaxrate.c | 330 |
1 files changed, 0 insertions, 330 deletions
diff --git a/gst/videomaxrate/videomaxrate.c b/gst/videomaxrate/videomaxrate.c deleted file mode 100644 index 0d7bb4f07..000000000 --- a/gst/videomaxrate/videomaxrate.c +++ /dev/null @@ -1,330 +0,0 @@ -/* - * GStreamer - limit video rate - * - * Copyright 2008 Barracuda Networks, Inc. - * - * Copyright 2009 Nokia Corporation - * Copyright 2009 Collabora Ltd, - * @contact: Olivier Crete <olivier.crete@collabora.co.uk> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - - -/** - * SECTION:element-videomaxrate - * @see_also: videorate - * - * This object will drop buffers that go beyond a certain buffer rate - * (ie frame rate). It should work with any kind of data where each buffer - * is independent. This currently means raw video frames and still image - * formats. - * - * The framerate is computed using a moving average. The period over which this - * average is computed is configurable using the "average-period" property. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "videomaxrate.h" - -static GstStaticPadTemplate gst_video_max_rate_src_template = - GST_STATIC_PAD_TEMPLATE ("src", - GST_PAD_SRC, - GST_PAD_ALWAYS, - GST_STATIC_CAPS ("video/x-raw-yuv; video/x-raw-rgb; video/x-raw-gray;" - "image/jpeg; image/png") - ); - -static GstStaticPadTemplate gst_video_max_rate_sink_template = - GST_STATIC_PAD_TEMPLATE ("sink", - GST_PAD_SINK, - GST_PAD_ALWAYS, - GST_STATIC_CAPS ("video/x-raw-yuv; video/x-raw-rgb; video/x-raw-gray;" - "image/jpeg; image/png") - ); - -static void gst_video_max_rate_set_property (GObject * object, guint prop_id, - const GValue * value, GParamSpec * pspec); -static void gst_video_max_rate_get_property (GObject * object, guint prop_id, - GValue * value, GParamSpec * pspec); - -static gboolean gst_video_max_rate_start (GstBaseTransform * trans); -static gboolean gst_video_max_rate_sink_event (GstBaseTransform * trans, - GstEvent * event); -static GstCaps *gst_video_max_rate_transform_caps (GstBaseTransform * trans, - GstPadDirection direction, GstCaps * caps); -static gboolean gst_video_max_rate_set_caps (GstBaseTransform * trans, - GstCaps * incaps, GstCaps * outcaps); -static GstFlowReturn gst_video_max_rate_transform_ip (GstBaseTransform * trans, - GstBuffer * buf); -static void gst_video_max_rate_fixate_caps (GstBaseTransform * trans, - GstPadDirection direction, GstCaps * caps, GstCaps * othercaps); - -GST_BOILERPLATE (GstVideoMaxRate, gst_video_max_rate, GstBaseTransform, - GST_TYPE_BASE_TRANSFORM); - -#define DEFAULT_AVERAGE_PERIOD GST_SECOND - -enum -{ - PROP_0, - PROP_AVERAGE_PERIOD -}; - -static void -gst_video_max_rate_base_init (gpointer gclass) -{ - GstElementClass *element_class = GST_ELEMENT_CLASS (gclass); - - gst_element_class_set_details_simple (element_class, - "Video maximum rate adjuster", - "Filter/Effect/Video", - "Drops extra frames", "Justin Karneges <justin@affinix.com>"); - - gst_element_class_add_pad_template (element_class, - gst_static_pad_template_get (&gst_video_max_rate_sink_template)); - gst_element_class_add_pad_template (element_class, - gst_static_pad_template_get (&gst_video_max_rate_src_template)); -} - -static void -gst_video_max_rate_class_init (GstVideoMaxRateClass * klass) -{ - GObjectClass *gobject_class = G_OBJECT_CLASS (klass); - GstBaseTransformClass *base_class = GST_BASE_TRANSFORM_CLASS (klass); - - gobject_class->set_property = gst_video_max_rate_set_property; - gobject_class->get_property = gst_video_max_rate_get_property; - - base_class->transform_caps = - GST_DEBUG_FUNCPTR (gst_video_max_rate_transform_caps); - base_class->set_caps = GST_DEBUG_FUNCPTR (gst_video_max_rate_set_caps); - base_class->transform_ip = - GST_DEBUG_FUNCPTR (gst_video_max_rate_transform_ip); - base_class->event = GST_DEBUG_FUNCPTR (gst_video_max_rate_sink_event); - base_class->start = GST_DEBUG_FUNCPTR (gst_video_max_rate_start); - base_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_video_max_rate_fixate_caps); - - g_object_class_install_property (gobject_class, PROP_AVERAGE_PERIOD, - g_param_spec_uint64 ("average-period", "Period over which to average", - "Period over which to average the framerate (in ns)", - 1, G_MAXINT64, DEFAULT_AVERAGE_PERIOD, - G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); -} - -static void -gst_video_max_rate_reset (GstVideoMaxRate * videomaxrate) -{ - videomaxrate->last_ts = GST_CLOCK_TIME_NONE; - videomaxrate->average = 0; -} - -static void -gst_video_max_rate_init (GstVideoMaxRate * videomaxrate, - GstVideoMaxRateClass * gclass) -{ - gst_video_max_rate_reset (videomaxrate); - videomaxrate->wanted_diff = 0; - videomaxrate->average_period = DEFAULT_AVERAGE_PERIOD; - - gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (videomaxrate), TRUE); - gst_base_transform_set_in_place (GST_BASE_TRANSFORM (videomaxrate), TRUE); -} - - -static void -gst_video_max_rate_set_property (GObject * object, guint prop_id, - const GValue * value, GParamSpec * pspec) -{ - GstVideoMaxRate *videomaxrate = GST_VIDEO_MAX_RATE (object); - - switch (prop_id) { - case PROP_AVERAGE_PERIOD: - videomaxrate->average_period = g_value_get_uint64 (value); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } -} - - -static void -gst_video_max_rate_get_property (GObject * object, guint prop_id, - GValue * value, GParamSpec * pspec) -{ - GstVideoMaxRate *videomaxrate = GST_VIDEO_MAX_RATE (object); - - switch (prop_id) { - case PROP_AVERAGE_PERIOD: - g_value_set_uint64 (value, videomaxrate->average_period); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } -} - -static gboolean -gst_video_max_rate_start (GstBaseTransform * trans) -{ - GstVideoMaxRate *videomaxrate = GST_VIDEO_MAX_RATE (trans); - - gst_video_max_rate_reset (videomaxrate); - - return TRUE; -} - -gboolean -gst_video_max_rate_sink_event (GstBaseTransform * trans, GstEvent * event) -{ - GstVideoMaxRate *videomaxrate = GST_VIDEO_MAX_RATE (trans); - - switch (GST_EVENT_TYPE (event)) { - case GST_EVENT_NEWSEGMENT: - case GST_EVENT_FLUSH_STOP: - gst_video_max_rate_reset (videomaxrate); - break; - default: - break; - } - - return TRUE; -} - -GstCaps * -gst_video_max_rate_transform_caps (GstBaseTransform * trans, - GstPadDirection direction, GstCaps * caps) -{ - GstCaps *ret; - GstStructure *s; - - /* this function is always called with a simple caps */ - g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), NULL); - - ret = gst_caps_copy (caps); - - s = gst_structure_copy (gst_caps_get_structure (caps, 0)); - - /* set the framerate as a range */ - gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, - G_MAXINT, 1, NULL); - - gst_caps_merge_structure (ret, s); - - return ret; -} - -static void -gst_video_max_rate_fixate_caps (GstBaseTransform * trans, - GstPadDirection direction, GstCaps * caps, GstCaps * othercaps) -{ - GstStructure *s; - gint nom, denom; - - s = gst_caps_get_structure (caps, 0); - if (G_UNLIKELY (!gst_structure_get_fraction (s, "framerate", &nom, &denom))) - return; - - s = gst_caps_get_structure (othercaps, 0); - gst_structure_fixate_field_nearest_fraction (s, "framerate", nom, denom); -} - -gboolean -gst_video_max_rate_set_caps (GstBaseTransform * trans, GstCaps * incaps, - GstCaps * outcaps) -{ - GstVideoMaxRate *videomaxrate = GST_VIDEO_MAX_RATE (trans); - GstStructure *cs; - gint numerator, denominator; - - // keep track of the outbound framerate - cs = gst_caps_get_structure (outcaps, 0); - if (!gst_structure_get_fraction (cs, "framerate", &numerator, &denominator)) - return FALSE; - - if (numerator) - videomaxrate->wanted_diff = gst_util_uint64_scale_int (GST_SECOND, - denominator, numerator); - else - videomaxrate->wanted_diff = 0; - - gst_video_max_rate_reset (videomaxrate); - - return TRUE; -} - -GstFlowReturn -gst_video_max_rate_transform_ip (GstBaseTransform * trans, GstBuffer * buf) -{ - GstVideoMaxRate *videomaxrate = GST_VIDEO_MAX_RATE (trans); - GstClockTime ts = GST_BUFFER_TIMESTAMP (buf); - - if (!GST_BUFFER_TIMESTAMP_IS_VALID (buf) || videomaxrate->wanted_diff == 0) - return GST_FLOW_OK; - - /* drop frames if they exceed our output rate */ - if (GST_CLOCK_TIME_IS_VALID (videomaxrate->last_ts)) { - GstClockTimeDiff diff = ts - videomaxrate->last_ts; - - /* Drop buffer if its early compared to the desired frame rate and - * the current average is higher than the desired average - */ - if (diff < videomaxrate->wanted_diff && - videomaxrate->average < videomaxrate->wanted_diff) - return GST_BASE_TRANSFORM_FLOW_DROPPED; - - /* Update average */ - if (videomaxrate->average) { - GstClockTimeDiff wanted_diff; - - if (G_LIKELY (videomaxrate->average_period > videomaxrate->wanted_diff)) - wanted_diff = videomaxrate->wanted_diff; - else - wanted_diff = videomaxrate->average_period * 10; - - videomaxrate->average = - gst_util_uint64_scale_round (videomaxrate->average, - videomaxrate->average_period - wanted_diff, - videomaxrate->average_period) + - gst_util_uint64_scale_round (diff, wanted_diff, - videomaxrate->average_period); - } else { - videomaxrate->average = diff; - } - } - - videomaxrate->last_ts = ts; - return GST_FLOW_OK; -} - - -static gboolean -plugin_init (GstPlugin * plugin) -{ - return gst_element_register (plugin, "videomaxrate", GST_RANK_NONE, - GST_TYPE_VIDEO_MAX_RATE); -} - -GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, - GST_VERSION_MINOR, - "videomaxrate", - "Drop extra frames", - plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) |