gstreamer/ext/cog/gstcogdownsample.c
2012-11-04 00:09:59 +00:00

378 lines
11 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2003> 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/*
* This file was (probably) generated from
* gstvideotemplate.c,v 1.18 2005/11/14 02:13:34 thomasvs Exp
* and
* $Id: make_filter,v 1.8 2004/04/19 22:51:57 ds Exp $
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#include <gst/video/video.h>
#include <string.h>
#include <cog/cog.h>
#include <math.h>
#include <cog/cogvirtframe.h>
#define GST_TYPE_COGDOWNSAMPLE \
(gst_cogdownsample_get_type())
#define GST_COGDOWNSAMPLE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_COGDOWNSAMPLE,GstCogdownsample))
#define GST_COGDOWNSAMPLE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_COGDOWNSAMPLE,GstCogdownsampleClass))
#define GST_IS_COGDOWNSAMPLE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_COGDOWNSAMPLE))
#define GST_IS_COGDOWNSAMPLE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_COGDOWNSAMPLE))
typedef struct _GstCogdownsample GstCogdownsample;
typedef struct _GstCogdownsampleClass GstCogdownsampleClass;
struct _GstCogdownsample
{
GstBaseTransform base_transform;
};
struct _GstCogdownsampleClass
{
GstBaseTransformClass parent_class;
};
GType gst_cogdownsample_get_type (void);
enum
{
ARG_0
};
static void gst_cogdownsample_base_init (gpointer g_class);
static void gst_cogdownsample_class_init (gpointer g_class,
gpointer class_data);
static void gst_cogdownsample_init (GTypeInstance * instance, gpointer g_class);
static void gst_cogdownsample_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_cogdownsample_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstCaps *gst_cogdownsample_transform_caps (GstBaseTransform *
base_transform, GstPadDirection direction, GstCaps * caps);
static GstFlowReturn gst_cogdownsample_transform (GstBaseTransform *
base_transform, GstBuffer * inbuf, GstBuffer * outbuf);
static gboolean gst_cogdownsample_get_unit_size (GstBaseTransform *
base_transform, GstCaps * caps, guint * size);
static GstStaticPadTemplate gst_cogdownsample_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, AYUV }"))
);
static GstStaticPadTemplate gst_cogdownsample_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, AYUV }"))
);
GType
gst_cogdownsample_get_type (void)
{
static GType compress_type = 0;
if (!compress_type) {
static const GTypeInfo compress_info = {
sizeof (GstCogdownsampleClass),
gst_cogdownsample_base_init,
NULL,
gst_cogdownsample_class_init,
NULL,
NULL,
sizeof (GstCogdownsample),
0,
gst_cogdownsample_init,
};
compress_type = g_type_register_static (GST_TYPE_BASE_TRANSFORM,
"GstCogdownsample", &compress_info, 0);
}
return compress_type;
}
static void
gst_cogdownsample_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_cogdownsample_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_cogdownsample_sink_template));
gst_element_class_set_static_metadata (element_class,
"Scale down video by factor of 2", "Filter/Effect/Video",
"Scales down video by a factor of 2", "David Schleef <ds@schleef.org>");
}
static void
gst_cogdownsample_class_init (gpointer g_class, gpointer class_data)
{
GObjectClass *gobject_class;
GstBaseTransformClass *base_transform_class;
gobject_class = G_OBJECT_CLASS (g_class);
base_transform_class = GST_BASE_TRANSFORM_CLASS (g_class);
gobject_class->set_property = gst_cogdownsample_set_property;
gobject_class->get_property = gst_cogdownsample_get_property;
base_transform_class->transform = gst_cogdownsample_transform;
base_transform_class->transform_caps = gst_cogdownsample_transform_caps;
base_transform_class->get_unit_size = gst_cogdownsample_get_unit_size;
}
static void
gst_cogdownsample_init (GTypeInstance * instance, gpointer g_class)
{
GST_DEBUG ("gst_cogdownsample_init");
}
static void
gst_cogdownsample_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
g_return_if_fail (GST_IS_COGDOWNSAMPLE (object));
GST_DEBUG ("gst_cogdownsample_set_property");
switch (prop_id) {
default:
break;
}
}
static void
gst_cogdownsample_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
g_return_if_fail (GST_IS_COGDOWNSAMPLE (object));
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
transform_value (GValue * dest, const GValue * src, GstPadDirection dir)
{
g_value_init (dest, G_VALUE_TYPE (src));
if (G_VALUE_HOLDS_INT (src)) {
int x;
x = g_value_get_int (src);
if (dir == GST_PAD_SINK) {
g_value_set_int (dest, x / 2);
} else {
g_value_set_int (dest, x * 2);
}
} else if (GST_VALUE_HOLDS_INT_RANGE (src)) {
int min, max;
min = gst_value_get_int_range_min (src);
max = gst_value_get_int_range_max (src);
if (dir == GST_PAD_SINK) {
min = (min + 1) / 2;
if (max == G_MAXINT) {
max = G_MAXINT / 2;
} else {
max = (max + 1) / 2;
}
} else {
if (max > G_MAXINT / 2) {
max = G_MAXINT;
} else {
max = max * 2;
}
if (min > G_MAXINT / 2) {
min = G_MAXINT;
} else {
min = min * 2;
}
}
gst_value_set_int_range (dest, min, max);
} else {
/* FIXME */
g_warning ("case not handled");
g_value_set_int (dest, 100);
}
}
static GstCaps *
gst_cogdownsample_transform_caps (GstBaseTransform * base_transform,
GstPadDirection direction, GstCaps * caps)
{
int i;
GstStructure *structure;
GValue new_value = { 0 };
const GValue *value;
caps = gst_caps_copy (caps);
for (i = 0; i < gst_caps_get_size (caps); i++) {
structure = gst_caps_get_structure (caps, i);
value = gst_structure_get_value (structure, "width");
transform_value (&new_value, value, direction);
gst_structure_set_value (structure, "width", &new_value);
g_value_unset (&new_value);
value = gst_structure_get_value (structure, "height");
transform_value (&new_value, value, direction);
gst_structure_set_value (structure, "height", &new_value);
g_value_unset (&new_value);
}
return caps;
}
static gboolean
gst_cogdownsample_get_unit_size (GstBaseTransform * base_transform,
GstCaps * caps, guint * size)
{
int width, height;
uint32_t format;
gst_structure_get_fourcc (gst_caps_get_structure (caps, 0),
"format", &format);
gst_structure_get_int (gst_caps_get_structure (caps, 0), "width", &width);
gst_structure_get_int (gst_caps_get_structure (caps, 0), "height", &height);
switch (format) {
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
*size = width * height * 3 / 2;
break;
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
*size = width * height * 2;
break;
case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
*size = width * height * 4;
break;
default:
g_assert_not_reached ();
}
return TRUE;
}
static GstFlowReturn
gst_cogdownsample_transform (GstBaseTransform * base_transform,
GstBuffer * inbuf, GstBuffer * outbuf)
{
CogFrame *outframe;
int width, height;
uint32_t format;
CogFrame *frame;
g_return_val_if_fail (GST_IS_COGDOWNSAMPLE (base_transform), GST_FLOW_ERROR);
gst_structure_get_fourcc (gst_caps_get_structure (inbuf->caps, 0),
"format", &format);
gst_structure_get_int (gst_caps_get_structure (inbuf->caps, 0),
"width", &width);
gst_structure_get_int (gst_caps_get_structure (inbuf->caps, 0),
"height", &height);
switch (format) {
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
frame = cog_frame_new_from_data_I420 (GST_BUFFER_DATA (inbuf),
width, height);
outframe = cog_frame_new_from_data_I420 (GST_BUFFER_DATA (outbuf),
width / 2, height / 2);
break;
case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
frame = cog_frame_new_from_data_YV12 (GST_BUFFER_DATA (inbuf),
width, height);
outframe = cog_frame_new_from_data_YV12 (GST_BUFFER_DATA (outbuf),
width / 2, height / 2);
break;
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
frame = cog_frame_new_from_data_YUY2 (GST_BUFFER_DATA (inbuf),
width, height);
outframe = cog_frame_new_from_data_YUY2 (GST_BUFFER_DATA (outbuf),
width / 2, height / 2);
break;
case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
frame = cog_frame_new_from_data_UYVY (GST_BUFFER_DATA (inbuf),
width, height);
outframe = cog_frame_new_from_data_UYVY (GST_BUFFER_DATA (outbuf),
width / 2, height / 2);
break;
case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
frame = cog_frame_new_from_data_AYUV (GST_BUFFER_DATA (inbuf),
width, height);
outframe = cog_frame_new_from_data_AYUV (GST_BUFFER_DATA (outbuf),
width / 2, height / 2);
break;
default:
g_assert_not_reached ();
return GST_FLOW_ERROR;
}
frame = cog_virt_frame_new_unpack (frame);
frame = cog_virt_frame_new_horiz_downsample (frame, 3);
frame = cog_virt_frame_new_vert_downsample (frame, 2);
switch (format) {
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
frame = cog_virt_frame_new_pack_YUY2 (frame);
break;
case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
frame = cog_virt_frame_new_pack_UYVY (frame);
break;
case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
frame = cog_virt_frame_new_pack_AYUV (frame);
break;
default:
break;
}
cog_virt_frame_render (frame, outframe);
cog_frame_unref (frame);
cog_frame_unref (outframe);
return GST_FLOW_OK;
}