gstreamer/gst-libs/gst/video/gstbasevideocodec.c
2011-05-16 20:32:23 +02:00

186 lines
4.6 KiB
C

/* GStreamer
* Copyright (C) 2006 David Schleef <ds@schleef.org>
*
* 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 "gstbasevideocodec.h"
#include <string.h>
#include <math.h>
GST_DEBUG_CATEGORY (basevideocodec_debug);
#define GST_CAT_DEFAULT basevideocodec_debug
/* GstBaseVideoCodec signals and args */
enum
{
LAST_SIGNAL
};
enum
{
ARG_0
};
static void gst_base_video_codec_finalize (GObject * object);
static GstStateChangeReturn gst_base_video_codec_change_state (GstElement *
element, GstStateChange transition);
GST_BOILERPLATE (GstBaseVideoCodec, gst_base_video_codec, GstElement,
GST_TYPE_ELEMENT);
static void
gst_base_video_codec_base_init (gpointer g_class)
{
GST_DEBUG_CATEGORY_INIT (basevideocodec_debug, "basevideocodec", 0,
"Base Video Codec");
}
static void
gst_base_video_codec_class_init (GstBaseVideoCodecClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
gobject_class = G_OBJECT_CLASS (klass);
element_class = GST_ELEMENT_CLASS (klass);
gobject_class->finalize = gst_base_video_codec_finalize;
element_class->change_state = gst_base_video_codec_change_state;
}
static void
gst_base_video_codec_init (GstBaseVideoCodec * base_video_codec,
GstBaseVideoCodecClass * klass)
{
GstPadTemplate *pad_template;
GST_DEBUG_OBJECT (base_video_codec, "gst_base_video_codec_init");
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "sink");
g_return_if_fail (pad_template != NULL);
base_video_codec->sinkpad = gst_pad_new_from_template (pad_template, "sink");
gst_element_add_pad (GST_ELEMENT (base_video_codec),
base_video_codec->sinkpad);
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
g_return_if_fail (pad_template != NULL);
base_video_codec->srcpad = gst_pad_new_from_template (pad_template, "src");
gst_element_add_pad (GST_ELEMENT (base_video_codec),
base_video_codec->srcpad);
gst_segment_init (&base_video_codec->segment, GST_FORMAT_TIME);
}
static void
gst_base_video_codec_reset (GstBaseVideoCodec * base_video_codec)
{
GList *g;
GST_DEBUG_OBJECT (base_video_codec, "reset");
for (g = base_video_codec->frames; g; g = g_list_next (g)) {
gst_base_video_codec_free_frame ((GstVideoFrame *) g->data);
}
g_list_free (base_video_codec->frames);
base_video_codec->frames = NULL;
base_video_codec->bytes = 0;
base_video_codec->time = 0;
}
static void
gst_base_video_codec_finalize (GObject * object)
{
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstStateChangeReturn
gst_base_video_codec_change_state (GstElement * element,
GstStateChange transition)
{
GstBaseVideoCodec *base_video_codec = GST_BASE_VIDEO_CODEC (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_base_video_codec_reset (base_video_codec);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = parent_class->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_base_video_codec_reset (base_video_codec);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
GstVideoFrame *
gst_base_video_codec_new_frame (GstBaseVideoCodec * base_video_codec)
{
GstVideoFrame *frame;
frame = g_malloc0 (sizeof (GstVideoFrame));
frame->system_frame_number = base_video_codec->system_frame_number;
base_video_codec->system_frame_number++;
return frame;
}
void
gst_base_video_codec_free_frame (GstVideoFrame * frame)
{
if (frame->sink_buffer) {
gst_buffer_unref (frame->sink_buffer);
}
if (frame->src_buffer) {
gst_buffer_unref (frame->src_buffer);
}
g_free (frame);
}