mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-18 07:47:17 +00:00
f037c7a742
Original commit message from CVS: Reworked the colorspace converter and the scaler API. Fixed some MMX bugs in the mpeg encoder.
68 lines
2.6 KiB
C
68 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 1995 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software and its
|
|
* documentation for any purpose, without fee, and without written agreement is
|
|
* hereby granted, provided that the above copyright notice and the following
|
|
* two paragraphs appear in all copies of this software.
|
|
*
|
|
* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
|
|
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
|
|
* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
|
|
* CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
|
|
* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
|
|
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
|
|
*/
|
|
|
|
#ifndef __YUV2RGB_H__
|
|
#define __YUV2RGB_H__
|
|
|
|
typedef struct _GstColorSpaceYUVTables GstColorSpaceYUVTables;
|
|
|
|
struct _GstColorSpaceYUVTables {
|
|
int gammaCorrectFlag;
|
|
double gammaCorrect;
|
|
int chromaCorrectFlag;
|
|
double chromaCorrect;
|
|
|
|
int *L_tab, *Cr_r_tab, *Cr_g_tab, *Cb_g_tab, *Cb_b_tab;
|
|
|
|
/*
|
|
* We define tables that convert a color value between -256 and 512
|
|
* into the R, G and B parts of the pixel. The normal range is 0-255.
|
|
**/
|
|
|
|
long *r_2_pix;
|
|
long *g_2_pix;
|
|
long *b_2_pix;
|
|
};
|
|
|
|
|
|
#define CB_BASE 1
|
|
#define CR_BASE (CB_BASE*CB_RANGE)
|
|
#define LUM_BASE (CR_BASE*CR_RANGE)
|
|
|
|
#define Min(x,y) (((x) < (y)) ? (x) : (y))
|
|
#define Max(x,y) (((x) > (y)) ? (x) : (y))
|
|
|
|
#define GAMMA_CORRECTION(x) ((int)(pow((x) / 255.0, 1.0 / gammaCorrect) * 255.0))
|
|
#define CHROMA_CORRECTION256(x) ((x) >= 128 \
|
|
? 128 + Min(127, (int)(((x) - 128.0) * chromaCorrect)) \
|
|
: 128 - Min(128, (int)((128.0 - (x)) * chromaCorrect)))
|
|
#define CHROMA_CORRECTION128(x) ((x) >= 0 \
|
|
? Min(127, (int)(((x) * chromaCorrect))) \
|
|
: Max(-128, (int)(((x) * chromaCorrect))))
|
|
#define CHROMA_CORRECTION256D(x) ((x) >= 128 \
|
|
? 128.0 + Min(127.0, (((x) - 128.0) * chromaCorrect)) \
|
|
: 128.0 - Min(128.0, (((128.0 - (x)) * chromaCorrect))))
|
|
#define CHROMA_CORRECTION128D(x) ((x) >= 0 \
|
|
? Min(127.0, ((x) * chromaCorrect)) \
|
|
: Max(-128.0, ((x) * chromaCorrect)))
|
|
|
|
#endif
|
|
|