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gst/alpha/: Stupid plugin to to RGBA to AYUV conversion because none of the colorspace plugins can handle that yet.

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Original commit message from CVS:
* gst/alpha/Makefile.am:
* gst/alpha/gstalphacolor.c: (gst_alpha_color_get_type),
(gst_alpha_color_base_init), (gst_alpha_color_class_init),
(gst_alpha_color_init), (gst_alpha_color_set_property),
(gst_alpha_color_get_property), (gst_alpha_color_sink_link),
(transform), (gst_alpha_color_chain),
(gst_alpha_color_change_state), (plugin_init):
Stupid plugin to to RGBA to AYUV conversion because none of
the colorspace plugins can handle that yet.
This commit is contained in:
Wim Taymans 2004-07-22 16:47:42 +00:00
parent f7d519c2f3
commit 048b2c1b3c
3 changed files with 362 additions and 1 deletions
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12
ChangeLog
View file

@ -1,3 +1,15 @@
2004-07-22 Wim Taymans <wim@fluendo.com>
* gst/alpha/Makefile.am:
* gst/alpha/gstalphacolor.c: (gst_alpha_color_get_type),
(gst_alpha_color_base_init), (gst_alpha_color_class_init),
(gst_alpha_color_init), (gst_alpha_color_set_property),
(gst_alpha_color_get_property), (gst_alpha_color_sink_link),
(transform), (gst_alpha_color_chain),
(gst_alpha_color_change_state), (plugin_init):
Stupid plugin to to RGBA to AYUV conversion because none of
the colorspace plugins can handle that yet.
2004-07-22 Wim Taymans <wim@fluendo.com>
* examples/seeking/seek.c: (update_scale), (main):

7
gst/alpha/Makefile.am
View file

@ -1,9 +1,14 @@
plugin_LTLIBRARIES = libgstalpha.la
plugin_LTLIBRARIES = libgstalpha.la libgstalphacolor.la
libgstalpha_la_SOURCES = gstalpha.c
libgstalpha_la_CFLAGS = $(GST_CFLAGS)
libgstalpha_la_LIBADD =
libgstalpha_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libgstalphacolor_la_SOURCES = gstalphacolor.c
libgstalphacolor_la_CFLAGS = $(GST_CFLAGS)
libgstalphacolor_la_LIBADD =
libgstalphacolor_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS =

344
gst/alpha/gstalphacolor.c Normal file
View file

@ -0,0 +1,344 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 <gst/gst.h>
#include <gst/video/video.h>
#include <string.h>
#define GST_TYPE_ALPHA_COLOR \
(gst_alpha_color_get_type())
#define GST_ALPHA_COLOR(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALPHA_COLOR,GstAlphaColor))
#define GST_ALPHA_COLOR_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALPHA_COLOR,GstAlphaColorClass))
#define GST_IS_ALPHA_COLOR(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALPHA_COLOR))
#define GST_IS_ALPHA_COLOR_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALPHA_COLOR))
typedef struct _GstAlphaColor GstAlphaColor;
typedef struct _GstAlphaColorClass GstAlphaColorClass;
struct _GstAlphaColor
{
GstElement element;
/* pads */
GstPad *sinkpad;
GstPad *srcpad;
/* caps */
gint in_width, in_height;
gint out_width, out_height;
};
struct _GstAlphaColorClass
{
GstElementClass parent_class;
};
/* elementfactory information */
static GstElementDetails gst_alpha_color_details =
GST_ELEMENT_DETAILS ("alpha color filter",
"Filter/Effect/Video",
"converts rgb to yuv with alpha",
"Wim Taymans <wim@fluendo.com>");
/* AlphaColor signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
/* FILL ME */
};
static GstStaticPadTemplate gst_alpha_color_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA)
);
static GstStaticPadTemplate gst_alpha_color_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV"))
);
static void gst_alpha_color_base_init (gpointer g_class);
static void gst_alpha_color_class_init (GstAlphaColorClass * klass);
static void gst_alpha_color_init (GstAlphaColor * alpha);
static void gst_alpha_color_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_alpha_color_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstPadLinkReturn
gst_alpha_color_sink_link (GstPad * pad, const GstCaps * caps);
static void gst_alpha_color_chain (GstPad * pad, GstData * _data);
static GstElementStateReturn gst_alpha_color_change_state (GstElement *
element);
static GstElementClass *parent_class = NULL;
/* static guint gst_alpha_color_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_alpha_color_get_type (void)
{
static GType alpha_type = 0;
if (!alpha_type) {
static const GTypeInfo alpha_info = {
sizeof (GstAlphaColorClass),
gst_alpha_color_base_init,
NULL,
(GClassInitFunc) gst_alpha_color_class_init,
NULL,
NULL,
sizeof (GstAlphaColor),
0,
(GInstanceInitFunc) gst_alpha_color_init,
};
alpha_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstAlphaColor", &alpha_info,
0);
}
return alpha_type;
}
static void
gst_alpha_color_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_alpha_color_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_alpha_color_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_alpha_color_src_template));
}
static void
gst_alpha_color_class_init (GstAlphaColorClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property = gst_alpha_color_set_property;
gobject_class->get_property = gst_alpha_color_get_property;
gstelement_class->change_state = gst_alpha_color_change_state;
}
static void
gst_alpha_color_init (GstAlphaColor * alpha)
{
/* create the sink and src pads */
alpha->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_alpha_color_sink_template), "sink");
gst_element_add_pad (GST_ELEMENT (alpha), alpha->sinkpad);
gst_pad_set_chain_function (alpha->sinkpad, gst_alpha_color_chain);
gst_pad_set_link_function (alpha->sinkpad, gst_alpha_color_sink_link);
alpha->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_alpha_color_src_template), "src");
gst_element_add_pad (GST_ELEMENT (alpha), alpha->srcpad);
GST_FLAG_SET (alpha, GST_ELEMENT_EVENT_AWARE);
}
/* do we need this function? */
static void
gst_alpha_color_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAlphaColor *alpha;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_ALPHA_COLOR (object));
alpha = GST_ALPHA_COLOR (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_alpha_color_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstAlphaColor *alpha;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_ALPHA_COLOR (object));
alpha = GST_ALPHA_COLOR (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstPadLinkReturn
gst_alpha_color_sink_link (GstPad * pad, const GstCaps * caps)
{
GstAlphaColor *alpha;
GstStructure *structure;
gboolean ret;
gdouble fps;
alpha = GST_ALPHA_COLOR (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "width", &alpha->in_width);
ret &= gst_structure_get_int (structure, "height", &alpha->in_height);
ret &= gst_structure_get_double (structure, "framerate", &fps);
if (!ret)
return GST_PAD_LINK_REFUSED;
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, GST_STR_FOURCC ("AYUV"),
"framerate", G_TYPE_DOUBLE, fps,
"width", G_TYPE_INT, alpha->in_width,
"height", G_TYPE_INT, alpha->in_height, NULL);
return gst_pad_try_set_caps (alpha->srcpad, caps);
}
static void
transform (guint8 * data, gint size)
{
guint8 y, u, v;
while (size > 0) {
y = data[0] * 0.299 + data[1] * 0.587 + data[2] * 0.114 + 0;
u = data[0] * -0.169 + data[1] * -0.332 + data[2] * 0.500 + 128;
v = data[0] * 0.500 + data[1] * -0.419 + data[2] * -0.0813 + 128;
data[0] = data[3];
data[1] = y;
data[2] = u;
data[3] = v;
data += 4;
size -= 4;
}
}
static void
gst_alpha_color_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buffer;
GstAlphaColor *alpha;
GstBuffer *outbuf;
gint width, height;
alpha = GST_ALPHA_COLOR (gst_pad_get_parent (pad));
if (GST_IS_EVENT (_data)) {
GstEvent *event = GST_EVENT (_data);
switch (GST_EVENT_TYPE (event)) {
default:
gst_pad_event_default (pad, event);
break;
}
return;
}
buffer = GST_BUFFER (_data);
width = alpha->in_width;
height = alpha->in_height;
outbuf = gst_buffer_copy_on_write (buffer);
transform (GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
gst_pad_push (alpha->srcpad, GST_DATA (outbuf));
}
static GstElementStateReturn
gst_alpha_color_change_state (GstElement * element)
{
GstAlphaColor *alpha;
alpha = GST_ALPHA_COLOR (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;
case GST_STATE_PLAYING_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
break;
case GST_STATE_READY_TO_NULL:
break;
}
parent_class->change_state (element);
return GST_STATE_SUCCESS;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "alphacolor", GST_RANK_NONE,
GST_TYPE_ALPHA_COLOR);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"alphacolor",
"colorspace conversion preserving the alpha channels",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)