/* 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 * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #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", "YCbCr-4:1:1", }; /* 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_YBR411 || 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]; }