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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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320 lines
8.2 KiB
C++
320 lines
8.2 KiB
C++
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/* GStreamer mpeg2enc (mjpegtools) wrapper
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* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* gstmpeg2enc.cc: gstreamer wrapping
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstmpeg2enc.hh"
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GST_PAD_TEMPLATE_FACTORY (sink_templ,
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"sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"mpeg2enc_sink",
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"video/x-raw-yuv",
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"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0')),
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"width", GST_PROPS_INT_RANGE (16, 4096),
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"height", GST_PROPS_INT_RANGE (16, 4096),
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"framerate", GST_PROPS_LIST (
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GST_PROPS_FLOAT (24/1.001),
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GST_PROPS_FLOAT (24.),
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GST_PROPS_FLOAT (25.),
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GST_PROPS_FLOAT (30/1.001),
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GST_PROPS_FLOAT (30.),
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GST_PROPS_FLOAT (50.),
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GST_PROPS_FLOAT (60/1.001),
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GST_PROPS_FLOAT (60.)
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)
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)
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)
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GST_PAD_TEMPLATE_FACTORY (src_templ,
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"src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"mpeg2enc_src",
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"video/mpeg",
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"systemstream", GST_PROPS_BOOLEAN (FALSE),
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"mpegversion", GST_PROPS_INT_RANGE (1, 2),
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"width", GST_PROPS_INT_RANGE (16, 4096),
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"height", GST_PROPS_INT_RANGE (16, 4096),
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"framerate", GST_PROPS_LIST (
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GST_PROPS_FLOAT (24/1.001),
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GST_PROPS_FLOAT (24.),
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GST_PROPS_FLOAT (25.),
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GST_PROPS_FLOAT (30/1.001),
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GST_PROPS_FLOAT (30.),
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GST_PROPS_FLOAT (50.),
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GST_PROPS_FLOAT (60/1.001),
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GST_PROPS_FLOAT (60.)
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)
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)
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)
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static void gst_mpeg2enc_base_init (GstMpeg2encClass *klass);
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static void gst_mpeg2enc_class_init (GstMpeg2encClass *klass);
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static void gst_mpeg2enc_init (GstMpeg2enc *enc);
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static void gst_mpeg2enc_dispose (GObject *object);
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static void gst_mpeg2enc_loop (GstElement *element);
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static GstPadLinkReturn
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gst_mpeg2enc_sink_link (GstPad *pad,
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GstCaps *caps);
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static GstCaps *
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gst_mpeg2enc_src_getcaps (GstPad *pad,
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GstCaps *caps);
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static GstElementStateReturn
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gst_mpeg2enc_change_state (GstElement *element);
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static void gst_mpeg2enc_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static void gst_mpeg2enc_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static GstElementClass *parent_class = NULL;
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GType
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gst_mpeg2enc_get_type (void)
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{
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static GType gst_mpeg2enc_type = 0;
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if (!gst_mpeg2enc_type) {
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static const GTypeInfo gst_mpeg2enc_info = {
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sizeof (GstMpeg2encClass),
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(GBaseInitFunc) gst_mpeg2enc_base_init,
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NULL,
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(GClassInitFunc) gst_mpeg2enc_class_init,
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NULL,
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NULL,
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sizeof (GstMpeg2enc),
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0,
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(GInstanceInitFunc) gst_mpeg2enc_init,
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};
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gst_mpeg2enc_type =
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g_type_register_static (GST_TYPE_ELEMENT,
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"GstMpeg2enc",
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&gst_mpeg2enc_info,
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(GTypeFlags) 0);
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}
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return gst_mpeg2enc_type;
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}
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static void
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gst_mpeg2enc_base_init (GstMpeg2encClass *klass)
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{
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static GstElementDetails gst_mpeg2enc_details = {
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"mpeg2enc video encoder",
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"Codec/Video/Encoder",
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"High-quality MPEG-1/2 video encoder",
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"Ronald Bultje <rbultje@ronald.bitfreak.net>",
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};
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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GST_PAD_TEMPLATE_GET (src_templ));
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gst_element_class_add_pad_template (element_class,
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GST_PAD_TEMPLATE_GET (sink_templ));
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gst_element_class_set_details (element_class,
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&gst_mpeg2enc_details);
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}
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static void
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gst_mpeg2enc_class_init (GstMpeg2encClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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parent_class = GST_ELEMENT_CLASS (g_type_class_ref (GST_TYPE_ELEMENT));
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/* register arguments */
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mjpeg_default_handler_verbosity (0);
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GstMpeg2EncOptions::initProperties (object_class);
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object_class->set_property = gst_mpeg2enc_set_property;
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object_class->get_property = gst_mpeg2enc_get_property;
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object_class->dispose = gst_mpeg2enc_dispose;
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element_class->change_state = gst_mpeg2enc_change_state;
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}
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static void
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gst_mpeg2enc_dispose (GObject *object)
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{
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GstMpeg2enc *enc = GST_MPEG2ENC (object);
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if (enc->encoder) {
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delete enc->encoder;
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enc->encoder = NULL;
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}
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delete enc->options;
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}
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static void
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gst_mpeg2enc_init (GstMpeg2enc *enc)
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{
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GstElement *element = GST_ELEMENT (enc);
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enc->sinkpad = gst_pad_new_from_template (
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gst_element_get_pad_template (element, "sink"), "sink");
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gst_pad_set_link_function (enc->sinkpad, gst_mpeg2enc_sink_link);
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gst_element_add_pad (element, enc->sinkpad);
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enc->srcpad = gst_pad_new_from_template (
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gst_element_get_pad_template (element, "src"), "src");
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gst_pad_set_getcaps_function (enc->srcpad, gst_mpeg2enc_src_getcaps);
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gst_element_add_pad (element, enc->srcpad);
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enc->options = new GstMpeg2EncOptions ();
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gst_element_set_loop_function (element, gst_mpeg2enc_loop);
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enc->encoder = NULL;
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}
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static void
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gst_mpeg2enc_loop (GstElement *element)
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{
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GstMpeg2enc *enc = GST_MPEG2ENC (element);
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if (!enc->encoder) {
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GstCaps *caps;
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/* create new encoder with these settings */
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enc->encoder = new GstMpeg2Encoder (enc->options,
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enc->sinkpad,
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GST_PAD_CAPS (enc->sinkpad),
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enc->srcpad);
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/* and set caps on other side */
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caps = enc->encoder->getFormat ();
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if (gst_pad_try_set_caps (enc->srcpad, caps) <= 0) {
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gst_element_error (element,
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"Failed to set up encoder properly");
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delete enc->encoder;
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enc->encoder = NULL;
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return;
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}
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}
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enc->encoder->encodePicture ();
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}
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static GstPadLinkReturn
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gst_mpeg2enc_sink_link (GstPad *pad,
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GstCaps *caps)
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{
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GstMpeg2enc *enc = GST_MPEG2ENC (gst_pad_get_parent (pad));
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if (!GST_CAPS_IS_FIXED (caps))
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return GST_PAD_LINK_DELAYED;
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if (enc->encoder) {
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delete enc->encoder;
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enc->encoder = NULL;
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}
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return GST_PAD_LINK_OK;
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}
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static GstCaps *
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gst_mpeg2enc_src_getcaps (GstPad *pad,
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GstCaps *caps)
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{
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GstMpeg2enc *enc = GST_MPEG2ENC (gst_pad_get_parent (pad));
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if (enc->encoder) {
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return enc->encoder->getFormat ();
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}
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return gst_caps_ref (gst_pad_template_get_caps (
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gst_element_get_pad_template (gst_pad_get_parent (pad), "src")));
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}
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static void
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gst_mpeg2enc_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GST_MPEG2ENC (object)->options->getProperty (prop_id, value);
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}
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static void
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gst_mpeg2enc_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GST_MPEG2ENC (object)->options->setProperty (prop_id, value);
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}
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static GstElementStateReturn
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gst_mpeg2enc_change_state (GstElement *element)
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{
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GstMpeg2enc *enc = GST_MPEG2ENC (element);
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switch (GST_STATE_TRANSITION (element)) {
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case GST_STATE_PAUSED_TO_READY:
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delete enc->encoder;
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enc->encoder = NULL;
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break;
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default:
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break;
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}
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if (parent_class->change_state)
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return parent_class->change_state (element);
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return GST_STATE_SUCCESS;
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}
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static gboolean
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plugin_init (GstPlugin *plugin)
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{
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return gst_element_register (plugin, "mpeg2enc",
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GST_RANK_NONE,
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GST_TYPE_MPEG2ENC);
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}
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GST_PLUGIN_DEFINE (
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GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"mpeg2enc",
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"High-quality MPEG-1/2 video encoder",
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plugin_init,
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VERSION,
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"GPL",
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GST_PACKAGE,
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GST_ORIGIN
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)
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