73 lines
2.1 KiB
C
Executable File
73 lines
2.1 KiB
C
Executable File
/*
|
|
* Copyright (C) 2015 Pedro Arthur <bygrandao@gmail.com>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "swscale_internal.h"
|
|
|
|
typedef struct GammaContext
|
|
{
|
|
uint16_t *table;
|
|
} GammaContext;
|
|
|
|
// gamma_convert expects 16 bit rgb format
|
|
// it writes directly in src slice thus it must be modifiable (done through cascade context)
|
|
static int gamma_convert(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
|
|
{
|
|
GammaContext *instance = desc->instance;
|
|
uint16_t *table = instance->table;
|
|
int srcW = desc->src->width;
|
|
|
|
int i;
|
|
for (i = 0; i < sliceH; ++i) {
|
|
uint8_t ** src = desc->src->plane[0].line;
|
|
int src_pos = sliceY+i - desc->src->plane[0].sliceY;
|
|
|
|
uint16_t *src1 = (uint16_t*)*(src+src_pos);
|
|
int j;
|
|
for (j = 0; j < srcW; ++j) {
|
|
uint16_t r = AV_RL16(src1 + j*4 + 0);
|
|
uint16_t g = AV_RL16(src1 + j*4 + 1);
|
|
uint16_t b = AV_RL16(src1 + j*4 + 2);
|
|
|
|
AV_WL16(src1 + j*4 + 0, table[r]);
|
|
AV_WL16(src1 + j*4 + 1, table[g]);
|
|
AV_WL16(src1 + j*4 + 2, table[b]);
|
|
}
|
|
|
|
}
|
|
return sliceH;
|
|
}
|
|
|
|
|
|
int ff_init_gamma_convert(SwsFilterDescriptor *desc, SwsSlice * src, uint16_t *table)
|
|
{
|
|
GammaContext *li = av_malloc(sizeof(GammaContext));
|
|
if (!li)
|
|
return AVERROR(ENOMEM);
|
|
li->table = table;
|
|
|
|
desc->instance = li;
|
|
desc->src = src;
|
|
desc->dst = NULL;
|
|
desc->process = &gamma_convert;
|
|
|
|
return 0;
|
|
}
|
|
|