gstreamer/gst/alpha/gstalphacolor.c
2010-03-16 21:23:11 +01:00

524 lines
14 KiB
C

/* 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.
*/
/**
* SECTION:element-alphacolor
*
* The alphacolor element does memory-efficient (in-place) colourspace
* conversion from RGBA to AYUV, preserving the alpha channel.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstalphacolor.h"
#include <gst/gst.h>
#include <gst/video/video.h>
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (alpha_color_debug);
#define GST_CAT_DEFAULT alpha_color_debug
/* elementfactory information */
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA ";"
GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_ABGR ";"
GST_VIDEO_CAPS_YUV ("AYUV"))
);
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA ";"
GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_ABGR ";"
GST_VIDEO_CAPS_YUV ("AYUV"))
);
GST_BOILERPLATE (GstAlphaColor, gst_alpha_color, GstVideoFilter,
GST_TYPE_VIDEO_FILTER);
static GstCaps *gst_alpha_color_transform_caps (GstBaseTransform * btrans,
GstPadDirection direction, GstCaps * caps);
static gboolean gst_alpha_color_set_caps (GstBaseTransform * btrans,
GstCaps * incaps, GstCaps * outcaps);
static GstFlowReturn gst_alpha_color_transform_ip (GstBaseTransform * btrans,
GstBuffer * inbuf);
static void
gst_alpha_color_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (element_class, "Alpha color filter",
"Filter/Effect/Video",
"ARGB from/to AYUV colorspace conversion preserving the alpha channel",
"Wim Taymans <wim@fluendo.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
}
static void
gst_alpha_color_class_init (GstAlphaColorClass * klass)
{
GstBaseTransformClass *gstbasetransform_class =
(GstBaseTransformClass *) klass;
gstbasetransform_class->transform_caps =
GST_DEBUG_FUNCPTR (gst_alpha_color_transform_caps);
gstbasetransform_class->set_caps =
GST_DEBUG_FUNCPTR (gst_alpha_color_set_caps);
gstbasetransform_class->transform_ip =
GST_DEBUG_FUNCPTR (gst_alpha_color_transform_ip);
GST_DEBUG_CATEGORY_INIT (alpha_color_debug, "alphacolor", 0,
"ARGB<->AYUV colorspace conversion preserving the alpha channels");
}
static void
gst_alpha_color_init (GstAlphaColor * alpha, GstAlphaColorClass * g_class)
{
GstBaseTransform *btrans = GST_BASE_TRANSFORM (alpha);
btrans->always_in_place = TRUE;
}
static GstCaps *
gst_alpha_color_transform_caps (GstBaseTransform * btrans,
GstPadDirection direction, GstCaps * caps)
{
const GstCaps *tmpl_caps = NULL;
GstCaps *result = NULL, *local_caps = NULL;
guint i;
local_caps = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstStructure *structure =
gst_structure_copy (gst_caps_get_structure (caps, i));
/* Remove any specific parameter from the structure */
gst_structure_remove_field (structure, "format");
gst_structure_remove_field (structure, "endianness");
gst_structure_remove_field (structure, "depth");
gst_structure_remove_field (structure, "bpp");
gst_structure_remove_field (structure, "red_mask");
gst_structure_remove_field (structure, "green_mask");
gst_structure_remove_field (structure, "blue_mask");
gst_structure_remove_field (structure, "alpha_mask");
gst_structure_set_name (structure, "video/x-raw-yuv");
gst_caps_append_structure (local_caps, gst_structure_copy (structure));
gst_structure_set_name (structure, "video/x-raw-rgb");
gst_caps_append_structure (local_caps, structure);
}
/* Get the appropriate template */
if (direction == GST_PAD_SINK) {
tmpl_caps = gst_static_pad_template_get_caps (&src_template);
} else if (direction == GST_PAD_SRC) {
tmpl_caps = gst_static_pad_template_get_caps (&sink_template);
}
/* Intersect with our template caps */
result = gst_caps_intersect (local_caps, tmpl_caps);
gst_caps_unref (local_caps);
gst_caps_do_simplify (result);
GST_LOG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
caps, result);
return result;
}
static gboolean
gst_alpha_color_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
GstCaps * outcaps)
{
GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
gboolean ret;
gint w, h;
gint w2, h2;
GstVideoFormat in_format, out_format;
ret = gst_video_format_parse_caps (incaps, &in_format, &w, &h);
ret &= gst_video_format_parse_caps (outcaps, &out_format, &w2, &h2);
if (!ret || w != w2 || h != h2) {
GST_DEBUG_OBJECT (alpha, "incomplete or invalid caps!");
return FALSE;
}
alpha->in_format = in_format;
alpha->out_format = out_format;
alpha->width = w;
alpha->height = h;
if (in_format == out_format)
gst_base_transform_set_passthrough (btrans, TRUE);
return TRUE;
}
#define DEFINE_ARGB_AYUV_FUNCTIONS(name, A, R, G, B) \
static void \
transform_##name##_ayuv (guint8 * data, gint size) \
{ \
guint8 y, u, v; \
\
while (size > 0) { \
y = data[R] * 0.299 + data[G] * 0.587 + data[B] * 0.114 + 0; \
u = data[R] * -0.169 + data[G] * -0.332 + data[B] * 0.500 + 128; \
v = data[R] * 0.500 + data[R] * -0.419 + data[B] * -0.0813 + 128; \
\
data[0] = data[A]; \
data[1] = y; \
data[2] = u; \
data[3] = v; \
\
data += 4; \
size -= 4; \
} \
} \
\
static void \
transform_ayuv_##name (guint8 * data, gint size) \
{ \
guint8 r, g, b; \
\
while (size > 0) { \
r = data[1] + (0.419 / 0.299) * (data[3] - 128); \
g = data[1] + (-0.114 / 0.331) * (data[2] - 128) + \
(-0.299 / 0.419) * (data[3] - 128); \
b = data[1] + (0.587 / 0.331) * (data[2] - 128); \
\
data[A] = data[0]; \
data[R] = r; \
data[G] = g; \
data[B] = b; \
\
data += 4; \
size -= 4; \
} \
}
DEFINE_ARGB_AYUV_FUNCTIONS (rgba, 3, 0, 1, 2);
DEFINE_ARGB_AYUV_FUNCTIONS (bgra, 3, 2, 1, 0);
DEFINE_ARGB_AYUV_FUNCTIONS (argb, 0, 1, 2, 3);
DEFINE_ARGB_AYUV_FUNCTIONS (abgr, 0, 3, 2, 1);
static void
transform_argb_bgra (guint8 * data, gint size)
{
guint8 r, g, b;
while (size > 0) {
r = data[1];
g = data[2];
b = data[3];
data[3] = data[0];
data[0] = b;
data[1] = g;
data[2] = r;
data += 4;
size -= 4;
}
}
#define transform_abgr_rgba transform_argb_bgra
static void
transform_argb_abgr (guint8 * data, gint size)
{
guint8 r, g, b;
while (size > 0) {
r = data[1];
g = data[2];
b = data[3];
/* data[0] = data[0]; */
data[1] = b;
data[2] = g;
data[3] = r;
data += 4;
size -= 4;
}
}
#define transform_abgr_argb transform_argb_abgr
static void
transform_rgba_bgra (guint8 * data, gint size)
{
guint8 r, g, b;
while (size > 0) {
r = data[0];
g = data[1];
b = data[2];
/* data[3] = data[3] */ ;
data[0] = b;
data[1] = g;
data[2] = r;
data += 4;
size -= 4;
}
}
#define transform_bgra_rgba transform_rgba_bgra
static void
transform_argb_rgba (guint8 * data, gint size)
{
guint8 r, g, b;
while (size > 0) {
r = data[1];
g = data[2];
b = data[3];
data[3] = data[0];
data[0] = r;
data[1] = g;
data[2] = b;
data += 4;
size -= 4;
}
}
#define transform_abgr_bgra transform_argb_rgba
static void
transform_bgra_argb (guint8 * data, gint size)
{
guint8 r, g, b;
while (size > 0) {
r = data[2];
g = data[1];
b = data[0];
data[0] = data[3];
data[1] = r;
data[2] = g;
data[3] = b;
data += 4;
size -= 4;
}
}
#define transform_rgba_abgr transform_bgra_argb
static void
transform_rgba_argb (guint8 * data, gint size)
{
guint8 r, g, b;
while (size > 0) {
r = data[0];
g = data[1];
b = data[2];
data[0] = data[3];
data[1] = r;
data[2] = g;
data[3] = b;
data += 4;
size -= 4;
}
}
#define transform_bgra_abgr transform_rgba_argb
static GstFlowReturn
gst_alpha_color_transform_ip (GstBaseTransform * btrans, GstBuffer * inbuf)
{
GstFlowReturn ret = GST_FLOW_OK;
GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
if (G_UNLIKELY (GST_BUFFER_SIZE (inbuf) != 4 * alpha->width * alpha->height)) {
GST_ERROR_OBJECT (alpha, "Invalid buffer size (was %u, expected %u)",
GST_BUFFER_SIZE (inbuf), alpha->width * alpha->height);
return GST_FLOW_ERROR;
}
/* Transform in place */
switch (alpha->in_format) {
case GST_VIDEO_FORMAT_ARGB:
switch (alpha->out_format) {
case GST_VIDEO_FORMAT_ARGB:
break;
case GST_VIDEO_FORMAT_BGRA:
transform_argb_bgra (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_ABGR:
transform_argb_abgr (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_RGBA:
transform_argb_rgba (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_AYUV:
transform_argb_ayuv (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
default:
g_assert_not_reached ();
break;
}
break;
case GST_VIDEO_FORMAT_BGRA:
switch (alpha->out_format) {
case GST_VIDEO_FORMAT_BGRA:
break;
case GST_VIDEO_FORMAT_ARGB:
transform_bgra_argb (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_ABGR:
transform_bgra_abgr (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_RGBA:
transform_bgra_rgba (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_AYUV:
transform_bgra_ayuv (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
default:
g_assert_not_reached ();
break;
}
break;
case GST_VIDEO_FORMAT_ABGR:
switch (alpha->out_format) {
case GST_VIDEO_FORMAT_ABGR:
break;
case GST_VIDEO_FORMAT_RGBA:
transform_abgr_rgba (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_ARGB:
transform_abgr_argb (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_BGRA:
transform_abgr_bgra (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_AYUV:
transform_abgr_ayuv (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
default:
g_assert_not_reached ();
break;
}
break;
case GST_VIDEO_FORMAT_RGBA:
switch (alpha->out_format) {
case GST_VIDEO_FORMAT_RGBA:
break;
case GST_VIDEO_FORMAT_ARGB:
transform_rgba_argb (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_ABGR:
transform_rgba_abgr (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_BGRA:
transform_rgba_bgra (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_AYUV:
transform_rgba_ayuv (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
default:
g_assert_not_reached ();
break;
}
break;
case GST_VIDEO_FORMAT_AYUV:
switch (alpha->out_format) {
case GST_VIDEO_FORMAT_AYUV:
break;
case GST_VIDEO_FORMAT_ARGB:
transform_ayuv_argb (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_BGRA:
transform_ayuv_bgra (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_ABGR:
transform_ayuv_abgr (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_RGBA:
transform_ayuv_rgba (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
default:
g_assert_not_reached ();
break;
}
break;
default:
g_assert_not_reached ();
break;
}
return ret;
}
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",
"RGBA from/to AYUV colorspace conversion preserving the alpha channel",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)