| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (C) 2015 Pedro Arthur <bygrandao@gmail.com> | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include "libavutil/mem.h" | ||
| 22 | #include "swscale_internal.h" | ||
| 23 | |||
| 24 | typedef struct GammaContext | ||
| 25 | { | ||
| 26 | uint16_t *table; | ||
| 27 | } GammaContext; | ||
| 28 | |||
| 29 | // gamma_convert expects 16 bit rgb format | ||
| 30 | // it writes directly in src slice thus it must be modifiable (done through cascade context) | ||
| 31 | ✗ | static int gamma_convert(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH) | |
| 32 | { | ||
| 33 | ✗ | GammaContext *instance = desc->instance; | |
| 34 | ✗ | uint16_t *table = instance->table; | |
| 35 | ✗ | int srcW = desc->src->width; | |
| 36 | |||
| 37 | int i; | ||
| 38 | ✗ | for (i = 0; i < sliceH; ++i) { | |
| 39 | ✗ | uint8_t ** src = desc->src->plane[0].line; | |
| 40 | ✗ | int src_pos = sliceY+i - desc->src->plane[0].sliceY; | |
| 41 | |||
| 42 | ✗ | uint16_t *src1 = (uint16_t*)*(src+src_pos); | |
| 43 | int j; | ||
| 44 | ✗ | for (j = 0; j < srcW; ++j) { | |
| 45 | ✗ | uint16_t r = AV_RL16(src1 + j*4 + 0); | |
| 46 | ✗ | uint16_t g = AV_RL16(src1 + j*4 + 1); | |
| 47 | ✗ | uint16_t b = AV_RL16(src1 + j*4 + 2); | |
| 48 | |||
| 49 | ✗ | AV_WL16(src1 + j*4 + 0, table[r]); | |
| 50 | ✗ | AV_WL16(src1 + j*4 + 1, table[g]); | |
| 51 | ✗ | AV_WL16(src1 + j*4 + 2, table[b]); | |
| 52 | } | ||
| 53 | |||
| 54 | } | ||
| 55 | ✗ | return sliceH; | |
| 56 | } | ||
| 57 | |||
| 58 | |||
| 59 | ✗ | int ff_init_gamma_convert(SwsFilterDescriptor *desc, SwsSlice * src, uint16_t *table) | |
| 60 | { | ||
| 61 | ✗ | GammaContext *li = av_malloc(sizeof(GammaContext)); | |
| 62 | ✗ | if (!li) | |
| 63 | ✗ | return AVERROR(ENOMEM); | |
| 64 | ✗ | li->table = table; | |
| 65 | |||
| 66 | ✗ | desc->instance = li; | |
| 67 | ✗ | desc->src = src; | |
| 68 | ✗ | desc->dst = NULL; | |
| 69 | ✗ | desc->process = &gamma_convert; | |
| 70 | |||
| 71 | ✗ | return 0; | |
| 72 | } | ||
| 73 | |||
| 74 |