gstreamer/gst/rawparse/gstvideoparse.c
2012-03-21 09:41:08 +01:00

262 lines
8.2 KiB
C

/* GStreamer
* Copyright (C) 2006 David A. Schleef <ds@schleef.org>
* Copyright (C) 2007,2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* gstvideoparse.c:
*
* 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.
*/
/**
* SECTION:element-videoparse
*
* Converts a byte stream into video frames.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstvideoparse.h"
static void gst_video_parse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_video_parse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstCaps *gst_video_parse_get_caps (GstRawParse * rp);
static void gst_video_parse_set_buffer_flags (GstRawParse * rp,
GstBuffer * buffer);
static void gst_video_parse_update_frame_size (GstVideoParse * vp);
GST_DEBUG_CATEGORY_STATIC (gst_video_parse_debug);
#define GST_CAT_DEFAULT gst_video_parse_debug
enum
{
PROP_0,
PROP_FORMAT,
PROP_WIDTH,
PROP_HEIGHT,
PROP_PAR,
PROP_FRAMERATE,
PROP_INTERLACED,
PROP_TOP_FIELD_FIRST
};
#define gst_video_parse_parent_class parent_class
G_DEFINE_TYPE (GstVideoParse, gst_video_parse, GST_TYPE_RAW_PARSE);
static void
gst_video_parse_class_init (GstVideoParseClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GstRawParseClass *rp_class = GST_RAW_PARSE_CLASS (klass);
GstCaps *caps;
gobject_class->set_property = gst_video_parse_set_property;
gobject_class->get_property = gst_video_parse_get_property;
rp_class->get_caps = gst_video_parse_get_caps;
rp_class->set_buffer_flags = gst_video_parse_set_buffer_flags;
g_object_class_install_property (gobject_class, PROP_FORMAT,
g_param_spec_enum ("format", "Format", "Format of images in raw stream",
GST_TYPE_VIDEO_FORMAT, GST_VIDEO_FORMAT_I420,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_WIDTH,
g_param_spec_int ("width", "Width", "Width of images in raw stream",
0, INT_MAX, 320, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_HEIGHT,
g_param_spec_int ("height", "Height", "Height of images in raw stream",
0, INT_MAX, 240, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_FRAMERATE,
gst_param_spec_fraction ("framerate", "Frame Rate",
"Frame rate of images in raw stream", 0, 1, 100, 1, 25, 1,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PAR,
gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio",
"Pixel aspect ratio of images in raw stream", 1, 100, 100, 1, 1, 1,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_INTERLACED,
g_param_spec_boolean ("interlaced", "Interlaced flag",
"True if video is interlaced", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TOP_FIELD_FIRST,
g_param_spec_boolean ("top-field-first", "Top field first",
"True if top field is earlier than bottom field", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_details_simple (gstelement_class, "Video Parse",
"Filter/Video",
"Converts stream into video frames",
"David Schleef <ds@schleef.org>, "
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
caps = gst_caps_from_string ("video/x-raw; video/x-bayer");
gst_raw_parse_class_set_src_pad_template (rp_class, caps);
gst_raw_parse_class_set_multiple_frames_per_buffer (rp_class, FALSE);
gst_caps_unref (caps);
GST_DEBUG_CATEGORY_INIT (gst_video_parse_debug, "videoparse", 0,
"videoparse element");
}
static void
gst_video_parse_init (GstVideoParse * vp)
{
vp->width = 320;
vp->height = 240;
vp->format = GST_VIDEO_FORMAT_I420;
vp->par_n = 1;
vp->par_d = 1;
gst_video_parse_update_frame_size (vp);
gst_raw_parse_set_fps (GST_RAW_PARSE (vp), 25, 1);
}
static void
gst_video_parse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoParse *vp = GST_VIDEO_PARSE (object);
g_return_if_fail (!gst_raw_parse_is_negotiated (GST_RAW_PARSE (vp)));
switch (prop_id) {
case PROP_FORMAT:
vp->format = g_value_get_enum (value);
break;
case PROP_WIDTH:
vp->width = g_value_get_int (value);
break;
case PROP_HEIGHT:
vp->height = g_value_get_int (value);
break;
case PROP_FRAMERATE:
gst_raw_parse_set_fps (GST_RAW_PARSE (vp),
gst_value_get_fraction_numerator (value),
gst_value_get_fraction_denominator (value));
break;
case PROP_PAR:
vp->par_n = gst_value_get_fraction_numerator (value);
vp->par_d = gst_value_get_fraction_denominator (value);
break;
case PROP_INTERLACED:
vp->interlaced = g_value_get_boolean (value);
break;
case PROP_TOP_FIELD_FIRST:
vp->top_field_first = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
gst_video_parse_update_frame_size (vp);
}
static void
gst_video_parse_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVideoParse *vp = GST_VIDEO_PARSE (object);
switch (prop_id) {
case PROP_FORMAT:
g_value_set_enum (value, vp->format);
break;
case PROP_WIDTH:
g_value_set_int (value, vp->width);
break;
case PROP_HEIGHT:
g_value_set_int (value, vp->height);
break;
case PROP_FRAMERATE:{
gint fps_n, fps_d;
gst_raw_parse_get_fps (GST_RAW_PARSE (vp), &fps_n, &fps_d);
gst_value_set_fraction (value, fps_n, fps_d);
break;
}
case PROP_PAR:
gst_value_set_fraction (value, vp->par_n, vp->par_d);
break;
case PROP_INTERLACED:
g_value_set_boolean (value, vp->interlaced);
break;
case PROP_TOP_FIELD_FIRST:
g_value_set_boolean (value, vp->top_field_first);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
void
gst_video_parse_update_frame_size (GstVideoParse * vp)
{
gint framesize;
GstVideoInfo info;
gst_video_info_init (&info);
gst_video_info_set_format (&info, vp->format, vp->width, vp->height);
framesize = GST_VIDEO_INFO_SIZE (&info);
gst_raw_parse_set_framesize (GST_RAW_PARSE (vp), framesize);
}
static GstCaps *
gst_video_parse_get_caps (GstRawParse * rp)
{
GstVideoParse *vp = GST_VIDEO_PARSE (rp);
GstVideoInfo info;
GstCaps *caps;
gint fps_n, fps_d;
gst_raw_parse_get_fps (rp, &fps_n, &fps_d);
gst_video_info_init (&info);
gst_video_info_set_format (&info, vp->format, vp->width, vp->height);
info.fps_n = fps_n;
info.fps_d = fps_d;
info.par_n = vp->par_n;
info.par_d = vp->par_d;
info.interlace_mode = vp->interlaced ?
GST_VIDEO_INTERLACE_MODE_INTERLEAVED :
GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
caps = gst_video_info_to_caps (&info);
return caps;
}
static void
gst_video_parse_set_buffer_flags (GstRawParse * rp, GstBuffer * buffer)
{
GstVideoParse *vp = GST_VIDEO_PARSE (rp);
if (vp->interlaced) {
if (vp->top_field_first) {
GST_BUFFER_FLAG_SET (buffer, GST_VIDEO_BUFFER_FLAG_TFF);
} else {
GST_BUFFER_FLAG_UNSET (buffer, GST_VIDEO_BUFFER_FLAG_TFF);
}
}
}