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/* GStreamer JPEG 2000 Sampling
* Copyright (C) <2016> Grok Image Compression Inc.
* @author Aaron Boxer <boxerab@gmail.com>
*
* 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.
*/
/**
* SECTION:gstjpeg2000sampling
* @title: GstJpeg2000Sampling
* @short_description: Manage JPEG 2000 sampling and colorspace fields
*
*/
#include "gstjpeg2000sampling.h"
/* string values corresponding to GstJPEG2000Sampling enums */
static const gchar *gst_jpeg2000_sampling_strings[] = {
"RGB",
"BGR",
"RGBA",
"BGRA",
"YCbCr-4:4:4",
"YCbCr-4:2:2",
"YCbCr-4:2:0",
"YCbCr-4:1:0",
"GRAYSCALE",
"YCbCrA-4:4:4:4",
};
/* convert string to GstJPEG2000Sampling enum */
GstJPEG2000Sampling
gst_jpeg2000_sampling_from_string (const gchar * sampling_string)
{
GstJPEG2000Sampling i;
if (sampling_string == NULL)
return GST_JPEG2000_SAMPLING_NONE;
for (i = 0; i < G_N_ELEMENTS (gst_jpeg2000_sampling_strings); ++i) {
if (!g_strcmp0 (sampling_string, gst_jpeg2000_sampling_strings[i]))
return (i + 1);
}
return GST_JPEG2000_SAMPLING_NONE;
}
/* convert GstJPEG2000Sampling enum to string */
const gchar *
gst_jpeg2000_sampling_to_string (GstJPEG2000Sampling sampling)
{
g_return_val_if_fail (sampling > 0
&& sampling <= G_N_ELEMENTS (gst_jpeg2000_sampling_strings), NULL);
return gst_jpeg2000_sampling_strings[sampling - 1];
}
/* check if @sampling is in RGB color space */
gboolean
gst_jpeg2000_sampling_is_rgb (GstJPEG2000Sampling sampling)
{
return sampling == GST_JPEG2000_SAMPLING_RGB ||
sampling == GST_JPEG2000_SAMPLING_RGBA ||
sampling == GST_JPEG2000_SAMPLING_BGR
|| sampling == GST_JPEG2000_SAMPLING_BGRA;
}
/* check if @sampling is in YUV color space */
gboolean
gst_jpeg2000_sampling_is_yuv (GstJPEG2000Sampling sampling)
{
return sampling == GST_JPEG2000_SAMPLING_YBRA4444_EXT ||
sampling == GST_JPEG2000_SAMPLING_YBR444 ||
sampling == GST_JPEG2000_SAMPLING_YBR422 ||
sampling == GST_JPEG2000_SAMPLING_YBR420
|| sampling == GST_JPEG2000_SAMPLING_YBR410;
}
/* check if @sampling is in GRAYSCALE color space */
gboolean
gst_jpeg2000_sampling_is_mono (GstJPEG2000Sampling sampling)
{
return sampling == GST_JPEG2000_SAMPLING_GRAYSCALE;
}
/* string values corresponding to GstJPEG2000Colorspace enums */
static const gchar *gst_jpeg2000_colorspace_strings[] = {
"sRGB",
"sYUV",
"GRAY",
};
/* convert GstJPEG2000Colorspace enum to string */
GstJPEG2000Colorspace
gst_jpeg2000_colorspace_from_string (const gchar * colorspace_string)
{
GstJPEG2000Colorspace i;
g_return_val_if_fail (colorspace_string != NULL,
GST_JPEG2000_COLORSPACE_NONE);
for (i = 0; i < G_N_ELEMENTS (gst_jpeg2000_colorspace_strings); ++i) {
if (!g_strcmp0 (colorspace_string, gst_jpeg2000_colorspace_strings[i]))
return (i + 1);
}
return GST_JPEG2000_COLORSPACE_NONE;
}
/* convert string to GstJPEG2000Colorspace enum */
const gchar *
gst_jpeg2000_colorspace_to_string (GstJPEG2000Colorspace colorspace)
{
g_return_val_if_fail (colorspace > GST_JPEG2000_COLORSPACE_NONE
&& colorspace <= G_N_ELEMENTS (gst_jpeg2000_colorspace_strings), NULL);
return gst_jpeg2000_colorspace_strings[colorspace - 1];
}
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