mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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338 lines
8.6 KiB
C++
338 lines
8.6 KiB
C++
/* 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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/*
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* We can't use fractions in static pad templates, so
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* we do something manual...
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*/
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static void
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add_fps (GstCaps *caps)
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{
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GstStructure *structure = gst_caps_get_structure (caps, 0);
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GValue list = { 0 }, fps = { 0 };
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gdouble fpss[] = { 24.0/1.001, 24.0, 25.0,
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30.0/1.001, 30.0, 50.0,
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60.0/1.001, 60.0, 0 };
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guint n;
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g_value_init (&list, GST_TYPE_LIST);
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g_value_init (&fps, G_TYPE_DOUBLE);
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for (n = 0; fpss[n] != 0; n++) {
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g_value_set_double (&fps, fpss[n]);
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gst_value_list_append_value (&list, &fps);
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}
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gst_structure_set_value (structure, "framerate", &list);
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g_value_unset (&list);
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g_value_unset (&fps);
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}
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static GstPadTemplate *
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sink_templ (void)
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{
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static GstPadTemplate *templ = NULL;
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if (!templ) {
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GstCaps *caps;
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caps = gst_caps_new_simple ("video/x-raw-yuv",
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"format", GST_TYPE_FOURCC,
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GST_MAKE_FOURCC ('I','4','2','0'),
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"width", GST_TYPE_INT_RANGE, 16, 4096,
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"height", GST_TYPE_INT_RANGE, 16, 4096,
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NULL);
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add_fps (caps);
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templ = gst_pad_template_new ("sink", GST_PAD_SINK,
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GST_PAD_ALWAYS, caps);
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}
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return templ;
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}
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static GstPadTemplate *
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src_templ (void)
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{
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static GstPadTemplate *templ = NULL;
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if (!templ) {
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GstCaps *caps;
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caps = gst_caps_new_simple ("video/mpeg",
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"systemstream", G_TYPE_BOOLEAN, FALSE,
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"mpegversion", GST_TYPE_INT_RANGE, 1, 2,
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"width", GST_TYPE_INT_RANGE, 16, 4096,
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"height", GST_TYPE_INT_RANGE, 16, 4096,
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NULL);
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add_fps (caps);
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templ = gst_pad_template_new ("src", GST_PAD_SRC,
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GST_PAD_ALWAYS, caps);
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}
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return templ;
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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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const 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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"Andrew Stevens <andrew.stevens@nexgo.de>\n"
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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, src_templ ());
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gst_element_class_add_pad_template (element_class, 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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GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
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GST_FLAG_SET (element, GST_ELEMENT_EVENT_AWARE);
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enc->sinkpad = gst_pad_new_from_template (
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gst_element_class_get_pad_template (klass, "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_class_get_pad_template (klass, "src"), "src");
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gst_pad_use_explicit_caps (enc->srcpad);
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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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const GstCaps *caps;
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GstCaps *othercaps;
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GstData *data;
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/* make sure we've had data */
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data = gst_pad_pull (enc->sinkpad);
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gst_pad_set_element_private (enc->sinkpad, data);
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if (!(caps = GST_PAD_CAPS (enc->sinkpad))) {
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GST_ELEMENT_ERROR (element, CORE, NEGOTIATION, (""),
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("format wasn't negotiated before loop function"));
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return;
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}
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/* create new encoder with these settings */
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enc->encoder = new GstMpeg2Encoder (enc->options, enc->sinkpad,
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caps, enc->srcpad);
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/* and set caps on other side */
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othercaps = enc->encoder->getFormat ();
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if (gst_pad_set_explicit_caps (enc->srcpad, othercaps) <= 0) {
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GST_ELEMENT_ERROR (element, CORE, NEGOTIATION, (""), (""));
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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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gst_pad_event_default (enc->sinkpad, gst_event_new (GST_EVENT_EOS));
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}
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static GstPadLinkReturn
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gst_mpeg2enc_sink_link (GstPad *pad,
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const 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 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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