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Add a Bayer-to-RGB converter. You know you want one, uh-huh.

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Original commit message from CVS:
* configure.ac:
* gst/bayer/Makefile.am:
* gst/bayer/gstbayer.c:
* gst/bayer/gstbayer2rgb.c:
Add a Bayer-to-RGB converter.  You know you want one, uh-huh.
Partial fix for #314160.
This commit is contained in:
David Schleef 2007-05-15 02:54:52 +00:00
parent f369175264
commit dc997023cd
5 changed files with 433 additions and 0 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2007-05-14 David Schleef <ds@schleef.org>
* configure.ac:
* gst/bayer/Makefile.am:
* gst/bayer/gstbayer.c:
* gst/bayer/gstbayer2rgb.c:
Add a Bayer-to-RGB converter. You know you want one, uh-huh.
Partial fix for #314160.
2007-05-14 Zaheer Abbas Merali <zaheerabbas at merali dot org>
* gst/switch/gstswitch.c (ARG_ACTIVE_SOURCE, ARG_STOP_VALUE,

2
configure.ac
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@ -80,6 +80,7 @@ AG_GST_ARG_EXAMPLES
dnl these are all the gst plug-ins, compilable without additional libs
GST_PLUGINS_ALL="\
app \
bayer \
cdxaparse \
deinterlace \
equalizer \
@ -1090,6 +1091,7 @@ Makefile
gst-plugins-bad.spec
gst/Makefile
gst/app/Makefile
gst/bayer/Makefile
gst/cdxaparse/Makefile
gst/deinterlace/Makefile
gst/equalizer/Makefile

6
gst/bayer/Makefile.am Normal file
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@ -0,0 +1,6 @@
plugin_LTLIBRARIES = libgstbayer.la
libgstbayer_la_SOURCES = gstbayer.c gstbayer2rgb.c
libgstbayer_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS)
libgstbayer_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) -lgstbase-0.10

43
gst/bayer/gstbayer.c Normal file
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@ -0,0 +1,43 @@
/* GStreamer
* Copyright (C) 2007 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 <gst/gst.h>
#include <gst/base/gstbasetransform.h>
GType gst_bayer2rgb_get_type (void);
static gboolean
plugin_init (GstPlugin * plugin)
{
gst_element_register (plugin, "bayer2rgb", GST_RANK_NONE,
gst_bayer2rgb_get_type ());
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"bayer",
"Elements to convert Bayer images",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

373
gst/bayer/gstbayer2rgb.c Normal file
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@ -0,0 +1,373 @@
/*
* GStreamer
* Copyright (C) 2007 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 <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#include <gst/video/video.h>
#include <string.h>
#include <stdint.h>
#define GST_CAT_DEFAULT gst_bayer2rgb_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#define GST_TYPE_BAYER2RGB (gst_bayer2rgb_get_type())
#define GST_BAYER2RGB(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BAYER2RGB,GstBayer2RGB))
#define GST_IS_BAYER2RGB(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BAYER2RGB))
#define GST_BAYER2RGB_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_BAYER2RGB,GstBayer2RGBClass))
#define GST_IS_BAYER2RGB_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_BAYER2RGB))
#define GST_BAYER2RGB_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_BAYER2RGB,GstBayer2RGBClass))
typedef struct _GstBayer2RGB GstBayer2RGB;
typedef struct _GstBayer2RGBClass GstBayer2RGBClass;
typedef void (*GstBayer2RGBProcessFunc) (GstBayer2RGB *, guint8 *, guint);
struct _GstBayer2RGB
{
GstBaseTransform basetransform;
/* < private > */
int width;
int height;
int stride;
uint8_t *tmpdata;
};
struct _GstBayer2RGBClass
{
GstBaseTransformClass parent;
};
static const GstElementDetails element_details = GST_ELEMENT_DETAILS ("FIXME",
"Filter/Effect",
"FIXME example filter",
"FIXME <fixme@fixme.com>");
#define SRC_CAPS GST_VIDEO_CAPS_ARGB
#define SINK_CAPS "video/x-raw-bayer,width=(int)[1,MAX],height=(int)[1,MAX]"
enum
{
PROP_0
};
#define DEBUG_INIT(bla) \
GST_DEBUG_CATEGORY_INIT (gst_bayer2rgb_debug, "bayer2rgb", 0, "bayer2rgb element");
GST_BOILERPLATE_FULL (GstBayer2RGB, gst_bayer2rgb, GstBaseTransform,
GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
static void gst_bayer2rgb_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_bayer2rgb_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_bayer2rgb_set_caps (GstBaseTransform * filter,
GstCaps * incaps, GstCaps * outcaps);
static GstFlowReturn gst_bayer2rgb_transform (GstBaseTransform * base,
GstBuffer * inbuf, GstBuffer * outbuf);
static void gst_bayer2rgb_reset (GstBayer2RGB * filter);
static GstCaps *gst_bayer2rgb_transform_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps);
static gboolean gst_bayer2rgb_get_unit_size (GstBaseTransform * base,
GstCaps * caps, guint * size);
static void
gst_bayer2rgb_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_set_details (element_class, &element_details);
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_caps_from_string (SRC_CAPS)));
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_caps_from_string (SINK_CAPS)));
}
static void
gst_bayer2rgb_class_init (GstBayer2RGBClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_bayer2rgb_set_property;
gobject_class->get_property = gst_bayer2rgb_get_property;
GST_BASE_TRANSFORM_CLASS (klass)->transform_caps =
GST_DEBUG_FUNCPTR (gst_bayer2rgb_transform_caps);
GST_BASE_TRANSFORM_CLASS (klass)->get_unit_size =
GST_DEBUG_FUNCPTR (gst_bayer2rgb_get_unit_size);
GST_BASE_TRANSFORM_CLASS (klass)->set_caps =
GST_DEBUG_FUNCPTR (gst_bayer2rgb_set_caps);
GST_BASE_TRANSFORM_CLASS (klass)->transform =
GST_DEBUG_FUNCPTR (gst_bayer2rgb_transform);
}
static void
gst_bayer2rgb_init (GstBayer2RGB * filter, GstBayer2RGBClass * klass)
{
gst_bayer2rgb_reset (filter);
gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), TRUE);
}
static void
gst_bayer2rgb_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
//GstBayer2RGB *filter = GST_BAYER2RGB (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_bayer2rgb_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
//GstBayer2RGB *filter = GST_BAYER2RGB (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_bayer2rgb_set_caps (GstBaseTransform * base, GstCaps * incaps,
GstCaps * outcaps)
{
GstBayer2RGB *filter = GST_BAYER2RGB (base);
GstStructure *structure;
GST_ERROR ("in caps %" GST_PTR_FORMAT " out caps %" GST_PTR_FORMAT, incaps,
outcaps);
structure = gst_caps_get_structure (incaps, 0);
gst_structure_get_int (structure, "width", &filter->width);
gst_structure_get_int (structure, "height", &filter->height);
filter->stride = GST_ROUND_UP_4 (filter->width);
if (filter->tmpdata) {
free (filter->tmpdata);
}
filter->tmpdata = malloc (filter->stride * (4 * 3 + 1));
return TRUE;
}
static void
gst_bayer2rgb_reset (GstBayer2RGB * filter)
{
filter->width = 0;
filter->height = 0;
filter->stride = 0;
if (filter->tmpdata) {
free (filter->tmpdata);
filter->tmpdata = NULL;
}
}
static GstCaps *
gst_bayer2rgb_transform_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps)
{
GstStructure *structure;
GstCaps *newcaps;
GstStructure *newstruct;
GST_ERROR ("transforming caps %" GST_PTR_FORMAT, caps);
structure = gst_caps_get_structure (caps, 0);
if (direction == GST_PAD_SRC) {
newcaps = gst_caps_new_simple ("video/x-raw-bayer", NULL);
} else {
newcaps = gst_caps_new_simple ("video/x-raw-rgb", NULL);
}
newstruct = gst_caps_get_structure (newcaps, 0);
gst_structure_set_value (newstruct, "width",
gst_structure_get_value (structure, "width"));
gst_structure_set_value (newstruct, "height",
gst_structure_get_value (structure, "height"));
gst_structure_set_value (newstruct, "framerate",
gst_structure_get_value (structure, "framerate"));
gst_structure_set_value (newstruct, "pixel-aspect-ratio",
gst_structure_get_value (structure, "pixel-aspect-ratio"));
GST_ERROR ("into %" GST_PTR_FORMAT, newcaps);
return newcaps;
}
static gboolean
gst_bayer2rgb_get_unit_size (GstBaseTransform * base, GstCaps * caps,
guint * size)
{
GstStructure *structure;
int width;
int height;
const char *name;
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &width);
gst_structure_get_int (structure, "height", &height);
name = gst_structure_get_name (structure);
if (strcmp (name, "video/x-raw-rgb")) {
*size = GST_ROUND_UP_4 (width) * height;
} else {
*size = 4 * width * height;
}
return TRUE;
}
#define ARGB(a,r,g,b) ((b)<<24 | (g)<<16 | (r)<<8 | a)
static void
upsample_even (uint8_t * dest, uint8_t * src, int width)
{
int i;
for (i = 0; i < width - 2; i += 2) {
dest[i] = src[i];
dest[i + 1] = (src[i] + src[i + 2] + 1) / 2;
}
dest[i] = src[i];
if (i + 1 < width) {
dest[i + 1] = src[i];
}
}
static void
upsample_odd (uint8_t * dest, uint8_t * src, int width)
{
int i;
dest[0] = src[1];
for (i = 1; i < width - 2; i += 2) {
dest[i] = src[i];
dest[i + 1] = (src[i] + src[i + 2] + 1) / 2;
}
dest[i] = src[i];
if (i + 1 < width) {
dest[i + 1] = src[i];
}
}
static void
interpolate (uint8_t * dest, uint8_t * src1, uint8_t * src2, int width)
{
int i;
for (i = 0; i < width; i++) {
dest[i] = (src1[i] + src2[i] + 1) / 2;
}
}
static void
merge (uint32_t * dest, uint8_t * r, uint8_t * g, uint8_t * b, int width)
{
int i;
for (i = 0; i < width; i++) {
dest[i] = ARGB (0xff, r[i], g[i], b[i]);
}
}
static GstFlowReturn
gst_bayer2rgb_transform (GstBaseTransform * base, GstBuffer * inbuf,
GstBuffer * outbuf)
{
GstBayer2RGB *filter = GST_BAYER2RGB (base);
uint8_t *tmpdata;
int j;
GST_DEBUG ("got here");
tmpdata = filter->tmpdata;
/* This is a pretty lousy algorithm. In particular, most higher
* quality algorithms will apply some non-linear weighting factors
* in red/blue interpolation based on the green components. This
* just does a linear interpolation between surrounding pixels.
* For green, we only interpolate horizontally. */
for (j = 0; j < filter->height + 1; j++) {
if (j < filter->height) {
/* upsample horizontally */
if ((j & 1) == 0) {
upsample_even (tmpdata + (1 * 4 + (j & 3)) * filter->stride,
(uint8_t *) GST_BUFFER_DATA (inbuf) + filter->stride * j,
filter->width);
upsample_odd (tmpdata + (0 * 4 + (j & 3)) * filter->stride,
(uint8_t *) GST_BUFFER_DATA (inbuf) + filter->stride * j,
filter->width);
} else {
upsample_even (tmpdata + (2 * 4 + (j & 3)) * filter->stride,
(uint8_t *) GST_BUFFER_DATA (inbuf) + filter->stride * j,
filter->width);
upsample_odd (tmpdata + (1 * 4 + (j & 3)) * filter->stride,
(uint8_t *) GST_BUFFER_DATA (inbuf) + filter->stride * j,
filter->width);
}
}
if (j - 1 >= 0 && j - 1 < filter->height) {
int comp, j1, j2;
if (((j - 1) & 1) == 0) {
comp = 2;
} else {
comp = 0;
}
j1 = j - 2;
if (j1 < 0)
j1 += 2;
j2 = j;
if (j2 > filter->height - 1)
j2 -= 2;
interpolate (tmpdata + (comp * 4 + ((j - 1) & 3)) * filter->stride,
tmpdata + (comp * 4 + (j1 & 3)) * filter->stride,
tmpdata + (comp * 4 + (j2 & 3)) * filter->stride, filter->width);
merge (
(uint32_t *) ((uint8_t *) GST_BUFFER_DATA (outbuf) +
4 * filter->width * (j - 1)),
tmpdata + (0 * 4 + ((j - 1) & 3)) * filter->stride,
tmpdata + (1 * 4 + ((j - 1) & 3)) * filter->stride,
tmpdata + (2 * 4 + ((j - 1) & 3)) * filter->stride, filter->width);
}
}
return GST_FLOW_OK;
}