mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-09 10:59:39 +00:00
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/* 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;
|
|
g_return_val_if_fail (sampling_string != NULL, 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];
|
|
}
|