gstreamer/ext/mpeg2enc/gstmpeg2enc.cc
Jan Schmidt 012dfb8b33 Fix up all the state change functions.
Original commit message from CVS:
Fix up all the state change functions.
2005-09-05 17:20:29 +00:00

329 lines
8.6 KiB
C++

/* GStreamer mpeg2enc (mjpegtools) wrapper
* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* gstmpeg2enc.cc: gstreamer wrapping
*
* 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 "gstmpeg2enc.hh"
/*
* We can't use fractions in static pad templates, so
* we do something manual...
*/
static void
add_fps (GstCaps * caps)
{
GstStructure *structure = gst_caps_get_structure (caps, 0);
GValue list = { 0 }, fps = {
0};
gdouble fpss[] = { 24.0 / 1.001, 24.0, 25.0,
30.0 / 1.001, 30.0, 50.0,
60.0 / 1.001, 60.0, 0
};
guint n;
g_value_init (&list, GST_TYPE_LIST);
g_value_init (&fps, G_TYPE_DOUBLE);
for (n = 0; fpss[n] != 0; n++) {
g_value_set_double (&fps, fpss[n]);
gst_value_list_append_value (&list, &fps);
}
gst_structure_set_value (structure, "framerate", &list);
g_value_unset (&list);
g_value_unset (&fps);
}
static GstPadTemplate *
sink_templ (void)
{
static GstPadTemplate *templ = NULL;
if (!templ) {
GstCaps *caps;
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC,
GST_MAKE_FOURCC ('I', '4', '2', '0'),
"width", GST_TYPE_INT_RANGE, 16, 4096,
"height", GST_TYPE_INT_RANGE, 16, 4096, NULL);
add_fps (caps);
templ = gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, caps);
}
return templ;
}
static GstPadTemplate *
src_templ (void)
{
static GstPadTemplate *templ = NULL;
if (!templ) {
GstCaps *caps;
caps = gst_caps_new_simple ("video/mpeg",
"systemstream", G_TYPE_BOOLEAN, FALSE,
"mpegversion", GST_TYPE_INT_RANGE, 1, 2,
"width", GST_TYPE_INT_RANGE, 16, 4096,
"height", GST_TYPE_INT_RANGE, 16, 4096, NULL);
add_fps (caps);
templ = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps);
}
return templ;
}
static void gst_mpeg2enc_base_init (GstMpeg2encClass * klass);
static void gst_mpeg2enc_class_init (GstMpeg2encClass * klass);
static void gst_mpeg2enc_init (GstMpeg2enc * enc);
static void gst_mpeg2enc_dispose (GObject * object);
static void gst_mpeg2enc_loop (GstElement * element);
static GstPadLinkReturn
gst_mpeg2enc_sink_link (GstPad * pad, const GstCaps * caps);
static GstStateChangeReturn gst_mpeg2enc_change_state (GstElement * element,
GstStateChange transition);
static void gst_mpeg2enc_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_mpeg2enc_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static GstElementClass *parent_class = NULL;
GType
gst_mpeg2enc_get_type (void)
{
static GType gst_mpeg2enc_type = 0;
if (!gst_mpeg2enc_type) {
static const GTypeInfo gst_mpeg2enc_info = {
sizeof (GstMpeg2encClass),
(GBaseInitFunc) gst_mpeg2enc_base_init,
NULL,
(GClassInitFunc) gst_mpeg2enc_class_init,
NULL,
NULL,
sizeof (GstMpeg2enc),
0,
(GInstanceInitFunc) gst_mpeg2enc_init,
};
gst_mpeg2enc_type =
g_type_register_static (GST_TYPE_ELEMENT,
"GstMpeg2enc", &gst_mpeg2enc_info, (GTypeFlags) 0);
}
return gst_mpeg2enc_type;
}
static void
gst_mpeg2enc_base_init (GstMpeg2encClass * klass)
{
static GstElementDetails gst_mpeg2enc_details = {
"mpeg2enc video encoder",
"Codec/Encoder/Video",
"High-quality MPEG-1/2 video encoder",
"Andrew Stevens <andrew.stevens@nexgo.de>\n"
"Ronald Bultje <rbultje@ronald.bitfreak.net>"
};
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class, src_templ ());
gst_element_class_add_pad_template (element_class, sink_templ ());
gst_element_class_set_details (element_class, &gst_mpeg2enc_details);
}
static void
gst_mpeg2enc_class_init (GstMpeg2encClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
parent_class = GST_ELEMENT_CLASS (g_type_class_ref (GST_TYPE_ELEMENT));
/* register arguments */
mjpeg_default_handler_verbosity (0);
GstMpeg2EncOptions::initProperties (object_class);
object_class->set_property = gst_mpeg2enc_set_property;
object_class->get_property = gst_mpeg2enc_get_property;
object_class->dispose = gst_mpeg2enc_dispose;
element_class->change_state = gst_mpeg2enc_change_state;
}
static void
gst_mpeg2enc_dispose (GObject * object)
{
GstMpeg2enc *enc = GST_MPEG2ENC (object);
if (enc->encoder) {
delete enc->encoder;
enc->encoder = NULL;
}
delete enc->options;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_mpeg2enc_init (GstMpeg2enc * enc)
{
GstElement *element = GST_ELEMENT (enc);
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
GST_FLAG_SET (element, GST_ELEMENT_EVENT_AWARE);
enc->sinkpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"sink"), "sink");
gst_pad_set_link_function (enc->sinkpad, gst_mpeg2enc_sink_link);
gst_element_add_pad (element, enc->sinkpad);
enc->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"src"), "src");
gst_pad_use_explicit_caps (enc->srcpad);
gst_element_add_pad (element, enc->srcpad);
enc->options = new GstMpeg2EncOptions ();
gst_element_set_loop_function (element, gst_mpeg2enc_loop);
enc->encoder = NULL;
}
static void
gst_mpeg2enc_loop (GstElement * element)
{
GstMpeg2enc *enc = GST_MPEG2ENC (element);
if (!enc->encoder) {
const GstCaps *caps;
GstCaps *othercaps;
GstData *data;
/* make sure we've had data */
data = gst_pad_pull (enc->sinkpad);
/* forward any events */
if (GST_IS_EVENT (data)) {
gst_pad_event_default (enc->sinkpad, GST_EVENT (data));
return;
}
gst_pad_set_element_private (enc->sinkpad, data);
if (!(caps = GST_PAD_CAPS (enc->sinkpad))) {
GST_ELEMENT_ERROR (element, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before loop function"));
return;
}
/* create new encoder with these settings */
enc->encoder = new GstMpeg2Encoder (enc->options, enc->sinkpad,
caps, enc->srcpad);
/* and set caps on other side */
othercaps = enc->encoder->getFormat ();
if (gst_pad_set_explicit_caps (enc->srcpad, othercaps) <= 0) {
GST_ELEMENT_ERROR (element, CORE, NEGOTIATION, (NULL), (NULL));
delete enc->encoder;
enc->encoder = NULL;
return;
}
}
enc->encoder->encodePicture ();
gst_pad_event_default (enc->sinkpad, gst_event_new (GST_EVENT_EOS));
}
static GstPadLinkReturn
gst_mpeg2enc_sink_link (GstPad * pad, const GstCaps * caps)
{
GstMpeg2enc *enc = GST_MPEG2ENC (gst_pad_get_parent (pad));
if (!gst_caps_is_fixed (caps))
return GST_PAD_LINK_DELAYED;
if (enc->encoder) {
delete enc->encoder;
enc->encoder = NULL;
}
return GST_PAD_LINK_OK;
}
static void
gst_mpeg2enc_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GST_MPEG2ENC (object)->options->getProperty (prop_id, value);
}
static void
gst_mpeg2enc_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GST_MPEG2ENC (object)->options->setProperty (prop_id, value);
}
static GstStateChangeReturn
gst_mpeg2enc_change_state (GstElement * element, GstStateChange transition)
{
GstMpeg2enc *enc = GST_MPEG2ENC (element);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
delete enc->encoder;
enc->encoder = NULL;
break;
default:
break;
}
if (parent_class->change_state)
return parent_class->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "mpeg2enc",
GST_RANK_NONE, GST_TYPE_MPEG2ENC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"mpeg2enc",
"High-quality MPEG-1/2 video encoder",
plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN)