Commit 7efecfc9 authored by Sebastian Dröge's avatar Sebastian Dröge

segmentclip: Add audio/video buffer segment clip elements

These elements clip the audio/video buffers to the configured segment
for the case when the upstream elements don't do this correctly.
parent a266d0ac
......@@ -296,6 +296,7 @@ AG_GST_CHECK_PLUGIN(real)
AG_GST_CHECK_PLUGIN(rtpmux)
AG_GST_CHECK_PLUGIN(scaletempo)
AG_GST_CHECK_PLUGIN(sdp)
AG_GST_CHECK_PLUGIN(segmentclip)
AG_GST_CHECK_PLUGIN(selector)
AG_GST_CHECK_PLUGIN(siren)
AG_GST_CHECK_PLUGIN(speed)
......@@ -1667,6 +1668,7 @@ gst/real/Makefile
gst/rtpmux/Makefile
gst/scaletempo/Makefile
gst/sdp/Makefile
gst/segmentclip/Makefile
gst/selector/Makefile
gst/siren/Makefile
gst/speed/Makefile
......
plugin_LTLIBRARIES = libgstsegmentclip.la
libgstsegmentclip_la_SOURCES = gstsegmentclip.c gstaudiosegmentclip.c gstvideosegmentclip.c plugin.c
libgstsegmentclip_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS)
libgstsegmentclip_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) $(GST_LIBS) -lgstaudio-@GST_MAJORMINOR@
libgstsegmentclip_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libgstsegmentclip_la_LIBTOOLFLAGS = --tag=disable-static
noinst_HEADERS = gstsegmentclip.h gstaudiosegmentclip.h gstvideosegmentclip.h
/* GStreamer
* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/audio/audio.h>
#include "gstaudiosegmentclip.h"
static GstStaticPadTemplate sink_pad_template =
GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS
("audio/x-raw-int, width=(int)[1,MAX], channels=(int)[1,MAX],rate=(int)[1,MAX]; audio/x-raw-float, width=(int)[1,MAX], channels=(int)[1,MAX],rate=(int)[1,MAX]"));
static GstStaticPadTemplate src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS
("audio/x-raw-int, width=(int)[1,MAX], channels=(int)[1,MAX],rate=(int)[1,MAX]; audio/x-raw-float, width=(int)[1,MAX], channels=(int)[1,MAX],rate=(int)[1,MAX]"));
static void gst_audio_segment_clip_reset (GstSegmentClip * self);
static GstFlowReturn gst_audio_segment_clip_clip_buffer (GstSegmentClip * self,
GstBuffer * buffer, GstBuffer ** outbuf);
static gboolean gst_audio_segment_clip_set_caps (GstSegmentClip * self,
GstCaps * caps);
GST_DEBUG_CATEGORY_STATIC (gst_audio_segment_clip_debug);
#define GST_CAT_DEFAULT gst_audio_segment_clip_debug
GST_BOILERPLATE (GstAudioSegmentClip, gst_audio_segment_clip, GstSegmentClip,
GST_TYPE_SEGMENT_CLIP);
static void
gst_audio_segment_clip_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (element_class,
"Audio buffer segment clipper",
"Filter/Audio",
"Clips audio buffers to the configured segment",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_pad_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_pad_template));
}
static void
gst_audio_segment_clip_class_init (GstAudioSegmentClipClass * klass)
{
GstSegmentClipClass *segment_clip_klass = GST_SEGMENT_CLIP_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (gst_audio_segment_clip_debug, "audiosegmentclip", 0,
"audiosegmentclip element");
segment_clip_klass->reset = GST_DEBUG_FUNCPTR (gst_audio_segment_clip_reset);
segment_clip_klass->set_caps =
GST_DEBUG_FUNCPTR (gst_audio_segment_clip_set_caps);
segment_clip_klass->clip_buffer =
GST_DEBUG_FUNCPTR (gst_audio_segment_clip_clip_buffer);
}
static void
gst_audio_segment_clip_init (GstAudioSegmentClip * self,
GstAudioSegmentClipClass * g_class)
{
}
static void
gst_audio_segment_clip_reset (GstSegmentClip * base)
{
GstAudioSegmentClip *self = GST_AUDIO_SEGMENT_CLIP (base);
GST_DEBUG_OBJECT (self, "Resetting internal state");
self->rate = self->framesize = 0;
}
static GstFlowReturn
gst_audio_segment_clip_clip_buffer (GstSegmentClip * base, GstBuffer * buffer,
GstBuffer ** outbuf)
{
GstAudioSegmentClip *self = GST_AUDIO_SEGMENT_CLIP (base);
GstSegment *segment = &base->segment;
GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);
GstClockTime duration = GST_BUFFER_DURATION (buffer);
guint64 offset = GST_BUFFER_OFFSET (buffer);
guint64 offset_end = GST_BUFFER_OFFSET_END (buffer);
guint size = GST_BUFFER_SIZE (buffer);
if (!self->rate || !self->framesize) {
GST_ERROR_OBJECT (self, "Not negotiated yet");
gst_buffer_unref (buffer);
return GST_FLOW_NOT_NEGOTIATED;
}
if (segment->format != GST_FORMAT_DEFAULT &&
segment->format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (self, "Unsupported segment format %s",
gst_format_get_name (segment->format));
*outbuf = buffer;
return GST_FLOW_OK;
}
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
GST_WARNING_OBJECT (self, "Buffer without valid timestamp");
*outbuf = buffer;
return GST_FLOW_OK;
}
*outbuf =
gst_audio_buffer_clip (buffer, segment, self->rate, self->framesize);
if (!*outbuf) {
GST_DEBUG_OBJECT (self, "Buffer outside the configured segment");
/* Now return unexpected if we're before/after the end */
if (segment->format == GST_FORMAT_TIME) {
if (segment->rate >= 0) {
if (segment->stop != -1 && timestamp >= segment->stop)
return GST_FLOW_UNEXPECTED;
} else {
if (!GST_CLOCK_TIME_IS_VALID (duration))
duration =
gst_util_uint64_scale_int (size, GST_SECOND,
self->framesize * self->rate);
if (segment->start != -1 && timestamp + duration <= segment->start)
return GST_FLOW_UNEXPECTED;
}
} else {
if (segment->rate >= 0) {
if (segment->stop != -1 && offset != -1 && offset >= segment->stop)
return GST_FLOW_UNEXPECTED;
} else if (offset != -1 || offset_end != -1) {
if (offset_end == -1)
offset_end = offset + size / self->framesize;
if (segment->start != -1 && offset_end <= segment->start)
return GST_FLOW_UNEXPECTED;
}
}
}
return GST_FLOW_OK;
}
static gboolean
gst_audio_segment_clip_set_caps (GstSegmentClip * base, GstCaps * caps)
{
GstAudioSegmentClip *self = GST_AUDIO_SEGMENT_CLIP (base);
gboolean ret;
GstStructure *s;
gint rate, channels, width;
s = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (s, "rate", &rate);
ret = ret && gst_structure_get_int (s, "channels", &channels);
ret = ret && gst_structure_get_int (s, "width", &width);
if (ret) {
GST_DEBUG_OBJECT (self, "Configured: rate %d channels %d width %d", rate,
channels, width);
self->rate = rate;
self->framesize = (width / 8) * channels;
}
return ret;
}
/* GStreamer
* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_AUDIO_SEGMENT_CLIP_H__
#define __GST_AUDIO_SEGMENT_CLIP_H__
#include <gst/gst.h>
#include "gstsegmentclip.h"
G_BEGIN_DECLS
#define GST_TYPE_AUDIO_SEGMENT_CLIP \
(gst_audio_segment_clip_get_type())
#define GST_AUDIO_SEGMENT_CLIP(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_SEGMENT_CLIP,GstAudioSegmentClip))
#define GST_AUDIO_SEGMENT_CLIP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_SEGMENT_CLIP,GstAudioSegmentClipClass))
#define GST_AUDIO_SEGMENT_CLIP_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_AUDIO_SEGMENT_CLIP,GstAudioSegmentClipClass))
#define GST_IS_AUDIO_SEGMENT_CLIP(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_SEGMENT_CLIP))
#define GST_IS_AUDIO_SEGMENT_CLIP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_SEGMENT_CLIP))
typedef struct _GstAudioSegmentClip GstAudioSegmentClip;
typedef struct _GstAudioSegmentClipClass GstAudioSegmentClipClass;
struct _GstAudioSegmentClip
{
GstSegmentClip parent;
/* < private > */
gint rate;
gint framesize;
};
struct _GstAudioSegmentClipClass
{
GstSegmentClipClass parent_class;
};
GType gst_audio_segment_clip_get_type (void);
G_END_DECLS
#endif /* __GST_AUDIO_SEGMENT_CLIP_H__ */
/* GStreamer
* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include "gstsegmentclip.h"
static void gst_segment_clip_reset (GstSegmentClip * self);
static GstStateChangeReturn gst_segment_clip_change_state (GstElement * element,
GstStateChange transition);
static GstFlowReturn gst_segment_clip_sink_chain (GstPad * pad,
GstBuffer * buffer);
static gboolean gst_segment_clip_sink_setcaps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_segment_clip_sink_bufferalloc (GstPad * pad,
guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
static gboolean gst_segment_clip_event (GstPad * pad, GstEvent * event);
static GstCaps *gst_segment_clip_getcaps (GstPad * pad);
static gboolean gst_segment_clip_query (GstPad * pad, GstQuery * query);
static const GstQueryType *gst_segment_clip_query_type (GstPad * pad);
GST_DEBUG_CATEGORY_STATIC (gst_segment_clip_debug);
#define GST_CAT_DEFAULT gst_segment_clip_debug
GST_BOILERPLATE (GstSegmentClip, gst_segment_clip, GstElement,
GST_TYPE_ELEMENT);
static void
gst_segment_clip_base_init (gpointer g_class)
{
}
static void
gst_segment_clip_class_init (GstSegmentClipClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (gst_segment_clip_debug, "segmentclip", 0,
"segmentclip base class");
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_segment_clip_change_state);
}
static void
gst_segment_clip_init (GstSegmentClip * self, GstSegmentClipClass * g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstPadTemplate *templ;
templ = gst_element_class_get_pad_template (element_class, "sink");
g_assert (templ);
self->sinkpad = gst_pad_new_from_template (templ, "sink");
gst_pad_set_chain_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_sink_chain));
gst_pad_set_event_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_event));
gst_pad_set_setcaps_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_sink_setcaps));
gst_pad_set_getcaps_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_getcaps));
gst_pad_set_bufferalloc_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_sink_bufferalloc));
gst_pad_set_query_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_query));
gst_pad_set_query_type_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_query_type));
gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
gst_object_unref (templ);
templ = gst_element_class_get_pad_template (element_class, "src");
g_assert (templ);
self->srcpad = gst_pad_new_from_template (templ, "src");
gst_pad_set_event_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_event));
gst_pad_set_getcaps_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_getcaps));
gst_pad_set_query_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_query));
gst_pad_set_query_type_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_segment_clip_query_type));
gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
gst_segment_clip_reset (self);
}
static void
gst_segment_clip_reset (GstSegmentClip * self)
{
GstSegmentClipClass *klass = GST_SEGMENT_CLIP_GET_CLASS (self);
GST_DEBUG_OBJECT (self, "Resetting internal state");
gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
if (klass->reset)
klass->reset (self);
}
static GstFlowReturn
gst_segment_clip_sink_bufferalloc (GstPad * pad, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
{
GstSegmentClip *self = GST_SEGMENT_CLIP (gst_pad_get_parent (pad));
GstFlowReturn ret = GST_FLOW_OK;
GST_LOG_OBJECT (pad, "Allocating buffer with offset 0x%" G_GINT64_MODIFIER
"x and size %u with caps: %" GST_PTR_FORMAT, offset, size, caps);
*buf = NULL;
ret = gst_pad_alloc_buffer (self->srcpad, offset, size, caps, buf);
if (G_UNLIKELY (ret != GST_FLOW_OK))
GST_ERROR_OBJECT (pad, "Allocating buffer failed: %s",
gst_flow_get_name (ret));
gst_object_unref (self);
return ret;
}
static gboolean
gst_segment_clip_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstSegmentClip *self = GST_SEGMENT_CLIP (gst_pad_get_parent (pad));
GstSegmentClipClass *klass = GST_SEGMENT_CLIP_GET_CLASS (self);
gboolean ret;
GST_DEBUG_OBJECT (pad, "Setting caps: %" GST_PTR_FORMAT, caps);
ret = klass->set_caps (self, caps);
gst_object_unref (self);
return ret;
}
static GstCaps *
gst_segment_clip_getcaps (GstPad * pad)
{
GstSegmentClip *self = GST_SEGMENT_CLIP (gst_pad_get_parent (pad));
GstPad *otherpad;
GstCaps *tmp, *ret;
otherpad = (pad == self->srcpad) ? self->sinkpad : self->srcpad;
tmp = gst_pad_peer_get_caps (otherpad);
if (tmp) {
ret = gst_caps_intersect (tmp, gst_pad_get_pad_template_caps (pad));
gst_caps_unref (tmp);
} else {
ret = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
}
gst_object_unref (self);
GST_LOG_OBJECT (pad, "Returning caps: %" GST_PTR_FORMAT, ret);
return ret;
}
static gboolean
gst_segment_clip_query (GstPad * pad, GstQuery * query)
{
GstSegmentClip *self = GST_SEGMENT_CLIP (gst_pad_get_parent (pad));
gboolean ret;
GstPad *otherpad;
otherpad = (pad == self->srcpad) ? self->sinkpad : self->srcpad;
GST_LOG_OBJECT (pad, "Handling query of type '%s'",
gst_query_type_get_name (GST_QUERY_TYPE (query)));
ret = gst_pad_peer_query (otherpad, query);
gst_object_unref (self);
return ret;
}
static const GstQueryType *
gst_segment_clip_query_type (GstPad * pad)
{
GstSegmentClip *self = GST_SEGMENT_CLIP (gst_pad_get_parent (pad));
GstPad *otherpad, *peer;
const GstQueryType *types = NULL;
otherpad = (pad == self->srcpad) ? self->sinkpad : self->srcpad;
peer = gst_pad_get_peer (otherpad);
if (peer) {
types = gst_pad_get_query_types (peer);
gst_object_unref (peer);
}
gst_object_unref (self);
return types;
}
static GstFlowReturn
gst_segment_clip_sink_chain (GstPad * pad, GstBuffer * buffer)
{
GstSegmentClip *self = GST_SEGMENT_CLIP (GST_PAD_PARENT (pad));
GstFlowReturn ret;
GstSegmentClipClass *klass = GST_SEGMENT_CLIP_GET_CLASS (self);
GstBuffer *outbuf = NULL;
GST_LOG_OBJECT (pad,
"Handling buffer with timestamp %" GST_TIME_FORMAT " and duration %"
GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
ret = klass->clip_buffer (self, buffer, &outbuf);
if (ret == GST_FLOW_OK && outbuf)
ret = gst_pad_push (self->srcpad, outbuf);
return ret;
}
static GstStateChangeReturn
gst_segment_clip_change_state (GstElement * element, GstStateChange transition)
{
GstSegmentClip *self = GST_SEGMENT_CLIP (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
if (GST_ELEMENT_CLASS (parent_class)->change_state)
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_segment_clip_reset (self);
break;
default:
break;
}
return ret;
}
static gboolean
gst_segment_clip_event (GstPad * pad, GstEvent * event)
{
GstSegmentClip *self = GST_SEGMENT_CLIP (gst_pad_get_parent (pad));
GstPad *otherpad;
gboolean ret;
GST_LOG_OBJECT (pad, "Got %s event", GST_EVENT_TYPE_NAME (event));
otherpad = (pad == self->srcpad) ? self->sinkpad : self->srcpad;
ret = gst_pad_push_event (otherpad, event);
if (ret) {
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:{
GstFormat fmt;
gboolean is_update;
gint64 start, end, base;
gdouble rate;
gst_event_parse_new_segment (event, &is_update, &rate, &fmt, &start,
&end, &base);
GST_DEBUG_OBJECT (pad,
"Got NEWSEGMENT event in %s format, passing on (%"
GST_TIME_FORMAT " - %" GST_TIME_FORMAT ")",
gst_format_get_name (fmt), GST_TIME_ARGS (start),
GST_TIME_ARGS (end));
gst_segment_set_newsegment (&self->segment, is_update, rate, fmt, start,
end, base);
break;
}
case GST_EVENT_FLUSH_STOP:
gst_segment_clip_reset (self);
break;
default:
break;
}
}
gst_object_unref (self);
return ret;
}
/* GStreamer
* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_SEGMENT_CLIP_H__
#define __GST_SEGMENT_CLIP_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_SEGMENT_CLIP \
(gst_segment_clip_get_type())
#define GST_SEGMENT_CLIP(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SEGMENT_CLIP,GstSegmentClip))
#define GST_SEGMENT_CLIP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SEGMENT_CLIP,GstSegmentClipClass))
#define GST_SEGMENT_CLIP_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_SEGMENT_CLIP,GstSegmentClipClass))
#define GST_IS_SEGMENT_CLIP(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SEGMENT_CLIP))
#define GST_IS_SEGMENT_CLIP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SEGMENT_CLIP))
typedef struct _GstSegmentClip GstSegmentClip;
typedef struct _GstSegmentClipClass GstSegmentClipClass;
struct _GstSegmentClip
{
GstElement parent;
/* < private > */
GstPad *sinkpad;
GstPad *srcpad;
GstSegment segment;
};
struct _GstSegmentClipClass
{
GstElementClass parent_class;
gboolean (*set_caps) (GstSegmentClip *self, GstCaps *caps);
GstFlowReturn (*clip_buffer) (GstSegmentClip *self, GstBuffer *buffer, GstBuffer **outbuf);
void (*reset) (GstSegmentClip *self);
};
GType gst_segment_clip_get_type (void);
G_END_DECLS
#endif /* __GST_SEGMENT_CLIP_H__ */
/* GStreamer
* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include "gstvideosegmentclip.h"
static GstStaticPadTemplate sink_pad_template =
GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS
("video/x-raw-yuv, framerate=" GST_VIDEO_FPS_RANGE "; "
"video/x-raw-rgb, framerate=" GST_VIDEO_FPS_RANGE "; "
"video/x-raw-grey, framerate=" GST_VIDEO_FPS_RANGE));
static GstStaticPadTemplate src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS
("video/x-raw-yuv, framerate=" GST_VIDEO_FPS_RANGE "; "
"video/x-raw-rgb, framerate=" GST_VIDEO_FPS_RANGE "; "
"video/x-raw-grey, framerate=" GST_VIDEO_FPS_RANGE));
static void gst_video_segment_clip_reset (GstSegmentClip * self);
static GstFlowReturn gst_video_segment_clip_clip_buffer (GstSegmentClip * self,
GstBuffer * buffer, GstBuffer ** outbuf);
static gboolean gst_video_segment_clip_set_caps (GstSegmentClip * self,
GstCaps * caps);
GST_DEBUG_CATEGORY_STATIC (gst_video_segment_clip_debug);
#define GST_CAT_DEFAULT gst_video_segment_clip_debug
GST_BOILERPLATE (GstVideoSegmentClip, gst_video_segment_clip, GstSegmentClip,
GST_TYPE_SEGMENT_CLIP);
static void
gst_video_segment_clip_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (element_class,
"Video buffer segment clipper",
"Filter/Video",
"Clips video buffers to the configured segment",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_pad_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_pad_template));
}
static void
gst_video_segment_clip_class_init (GstVideoSegmentClipClass * klass)
{
GstSegmentClipClass *segment_clip_klass = GST_SEGMENT_CLIP_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (gst_video_segment_clip_debug, "videosegmentclip", 0,