mirror of https://git.ffmpeg.org/ffmpeg.git
394 lines
13 KiB
C
394 lines
13 KiB
C
/*
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* Copyright (c) 2021 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <float.h>
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "drawutils.h"
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#include "internal.h"
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#include "video.h"
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#define R 0
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#define G 1
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#define B 2
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typedef struct ColorTemperatureContext {
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const AVClass *class;
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float temperature;
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float mix;
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float preserve;
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float color[3];
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int step;
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int depth;
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uint8_t rgba_map[4];
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int (*do_slice)(AVFilterContext *s, void *arg,
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int jobnr, int nb_jobs);
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} ColorTemperatureContext;
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static float saturate(float input)
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{
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return av_clipf(input, 0.f, 1.f);
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}
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static void kelvin2rgb(float k, float *rgb)
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{
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float kelvin = k / 100.0f;
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if (kelvin <= 66.0f) {
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rgb[0] = 1.0f;
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rgb[1] = saturate(0.39008157876901960784f * logf(kelvin) - 0.63184144378862745098f);
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} else {
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const float t = fmaxf(kelvin - 60.0f, 0.0f);
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rgb[0] = saturate(1.29293618606274509804f * powf(t, -0.1332047592f));
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rgb[1] = saturate(1.12989086089529411765f * powf(t, -0.0755148492f));
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}
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if (kelvin >= 66.0f)
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rgb[2] = 1.0f;
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else if (kelvin <= 19.0f)
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rgb[2] = 0.0f;
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else
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rgb[2] = saturate(0.54320678911019607843f * logf(kelvin - 10.0f) - 1.19625408914f);
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}
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static float lerpf(float v0, float v1, float f)
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{
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return v0 + (v1 - v0) * f;
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}
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#define PROCESS() \
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nr = r * color[0]; \
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ng = g * color[1]; \
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nb = b * color[2]; \
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\
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nr = lerpf(r, nr, mix); \
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ng = lerpf(g, ng, mix); \
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nb = lerpf(b, nb, mix); \
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\
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l0 = (FFMAX3(r, g, b) + FFMIN3(r, g, b)) + FLT_EPSILON; \
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l1 = (FFMAX3(nr, ng, nb) + FFMIN3(nr, ng, nb)) + FLT_EPSILON; \
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l = l0 / l1; \
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\
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r = nr * l; \
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g = ng * l; \
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b = nb * l; \
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\
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nr = lerpf(nr, r, preserve); \
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ng = lerpf(ng, g, preserve); \
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nb = lerpf(nb, b, preserve);
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static int temperature_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorTemperatureContext *s = ctx->priv;
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AVFrame *frame = arg;
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const int width = frame->width;
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const int height = frame->height;
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const float mix = s->mix;
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const float preserve = s->preserve;
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const float *color = s->color;
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const int slice_start = (height * jobnr) / nb_jobs;
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const int slice_end = (height * (jobnr + 1)) / nb_jobs;
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const ptrdiff_t glinesize = frame->linesize[0];
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const ptrdiff_t blinesize = frame->linesize[1];
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const ptrdiff_t rlinesize = frame->linesize[2];
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uint8_t *gptr = frame->data[0] + slice_start * glinesize;
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uint8_t *bptr = frame->data[1] + slice_start * blinesize;
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uint8_t *rptr = frame->data[2] + slice_start * rlinesize;
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for (int y = slice_start; y < slice_end; y++) {
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for (int x = 0; x < width; x++) {
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float g = gptr[x];
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float b = bptr[x];
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float r = rptr[x];
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float nr, ng, nb;
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float l0, l1, l;
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PROCESS()
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gptr[x] = av_clip_uint8(ng);
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bptr[x] = av_clip_uint8(nb);
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rptr[x] = av_clip_uint8(nr);
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}
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gptr += glinesize;
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bptr += blinesize;
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rptr += rlinesize;
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}
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return 0;
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}
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static int temperature_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorTemperatureContext *s = ctx->priv;
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AVFrame *frame = arg;
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const int depth = s->depth;
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const int width = frame->width;
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const int height = frame->height;
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const float preserve = s->preserve;
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const float mix = s->mix;
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const float *color = s->color;
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const int slice_start = (height * jobnr) / nb_jobs;
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const int slice_end = (height * (jobnr + 1)) / nb_jobs;
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const ptrdiff_t glinesize = frame->linesize[0] / sizeof(uint16_t);
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const ptrdiff_t blinesize = frame->linesize[1] / sizeof(uint16_t);
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const ptrdiff_t rlinesize = frame->linesize[2] / sizeof(uint16_t);
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uint16_t *gptr = (uint16_t *)frame->data[0] + slice_start * glinesize;
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uint16_t *bptr = (uint16_t *)frame->data[1] + slice_start * blinesize;
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uint16_t *rptr = (uint16_t *)frame->data[2] + slice_start * rlinesize;
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for (int y = slice_start; y < slice_end; y++) {
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for (int x = 0; x < width; x++) {
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float g = gptr[x];
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float b = bptr[x];
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float r = rptr[x];
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float nr, ng, nb;
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float l0, l1, l;
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PROCESS()
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gptr[x] = av_clip_uintp2_c(ng, depth);
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bptr[x] = av_clip_uintp2_c(nb, depth);
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rptr[x] = av_clip_uintp2_c(nr, depth);
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}
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gptr += glinesize;
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bptr += blinesize;
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rptr += rlinesize;
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}
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return 0;
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}
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static int temperature_slice32(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorTemperatureContext *s = ctx->priv;
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AVFrame *frame = arg;
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const int width = frame->width;
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const int height = frame->height;
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const float preserve = s->preserve;
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const float mix = s->mix;
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const float *color = s->color;
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const int slice_start = (height * jobnr) / nb_jobs;
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const int slice_end = (height * (jobnr + 1)) / nb_jobs;
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const ptrdiff_t glinesize = frame->linesize[0] / sizeof(float);
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const ptrdiff_t blinesize = frame->linesize[1] / sizeof(float);
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const ptrdiff_t rlinesize = frame->linesize[2] / sizeof(float);
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float *gptr = (float *)frame->data[0] + slice_start * glinesize;
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float *bptr = (float *)frame->data[1] + slice_start * blinesize;
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float *rptr = (float *)frame->data[2] + slice_start * rlinesize;
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for (int y = slice_start; y < slice_end; y++) {
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for (int x = 0; x < width; x++) {
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float g = gptr[x];
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float b = bptr[x];
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float r = rptr[x];
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float nr, ng, nb;
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float l0, l1, l;
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PROCESS()
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gptr[x] = ng;
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bptr[x] = nb;
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rptr[x] = nr;
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}
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gptr += glinesize;
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bptr += blinesize;
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rptr += rlinesize;
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}
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return 0;
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}
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static int temperature_slice8p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorTemperatureContext *s = ctx->priv;
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AVFrame *frame = arg;
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const int step = s->step;
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const int width = frame->width;
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const int height = frame->height;
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const float mix = s->mix;
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const float preserve = s->preserve;
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const float *color = s->color;
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const uint8_t roffset = s->rgba_map[R];
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const uint8_t goffset = s->rgba_map[G];
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const uint8_t boffset = s->rgba_map[B];
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const int slice_start = (height * jobnr) / nb_jobs;
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const int slice_end = (height * (jobnr + 1)) / nb_jobs;
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const ptrdiff_t linesize = frame->linesize[0];
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uint8_t *ptr = frame->data[0] + slice_start * linesize;
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for (int y = slice_start; y < slice_end; y++) {
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for (int x = 0; x < width; x++) {
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float g = ptr[x * step + goffset];
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float b = ptr[x * step + boffset];
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float r = ptr[x * step + roffset];
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float nr, ng, nb;
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float l0, l1, l;
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PROCESS()
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ptr[x * step + goffset] = av_clip_uint8(ng);
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ptr[x * step + boffset] = av_clip_uint8(nb);
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ptr[x * step + roffset] = av_clip_uint8(nr);
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}
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ptr += linesize;
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}
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return 0;
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}
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static int temperature_slice16p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorTemperatureContext *s = ctx->priv;
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AVFrame *frame = arg;
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const int step = s->step;
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const int depth = s->depth;
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const int width = frame->width;
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const int height = frame->height;
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const float preserve = s->preserve;
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const float mix = s->mix;
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const float *color = s->color;
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const uint8_t roffset = s->rgba_map[R];
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const uint8_t goffset = s->rgba_map[G];
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const uint8_t boffset = s->rgba_map[B];
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const int slice_start = (height * jobnr) / nb_jobs;
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const int slice_end = (height * (jobnr + 1)) / nb_jobs;
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const ptrdiff_t linesize = frame->linesize[0] / sizeof(uint16_t);
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uint16_t *ptr = (uint16_t *)frame->data[0] + slice_start * linesize;
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for (int y = slice_start; y < slice_end; y++) {
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for (int x = 0; x < width; x++) {
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float g = ptr[x * step + goffset];
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float b = ptr[x * step + boffset];
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float r = ptr[x * step + roffset];
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float nr, ng, nb;
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float l0, l1, l;
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PROCESS()
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ptr[x * step + goffset] = av_clip_uintp2_c(ng, depth);
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ptr[x * step + boffset] = av_clip_uintp2_c(nb, depth);
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ptr[x * step + roffset] = av_clip_uintp2_c(nr, depth);
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}
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ptr += linesize;
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}
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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AVFilterContext *ctx = inlink->dst;
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ColorTemperatureContext *s = ctx->priv;
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kelvin2rgb(s->temperature, s->color);
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ff_filter_execute(ctx, s->do_slice, frame, NULL,
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FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
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return ff_filter_frame(ctx->outputs[0], frame);
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}
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static const enum AVPixelFormat pixel_fmts[] = {
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AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
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AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
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AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
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AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
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AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
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AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
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AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
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AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
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AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32,
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AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
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AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
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AV_PIX_FMT_NONE
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};
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static av_cold int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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ColorTemperatureContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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int planar = desc->flags & AV_PIX_FMT_FLAG_PLANAR;
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s->step = desc->nb_components;
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if (inlink->format == AV_PIX_FMT_RGB0 ||
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inlink->format == AV_PIX_FMT_0RGB ||
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inlink->format == AV_PIX_FMT_BGR0 ||
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inlink->format == AV_PIX_FMT_0BGR)
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s->step = 4;
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s->depth = desc->comp[0].depth;
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s->do_slice = s->depth <= 8 ? temperature_slice8 : temperature_slice16;
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if (!planar)
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s->do_slice = s->depth <= 8 ? temperature_slice8p : temperature_slice16p;
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if (s->depth == 32)
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s->do_slice = temperature_slice32;
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ff_fill_rgba_map(s->rgba_map, inlink->format);
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return 0;
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}
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static const AVFilterPad inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
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.filter_frame = filter_frame,
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.config_props = config_input,
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},
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};
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#define OFFSET(x) offsetof(ColorTemperatureContext, x)
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#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption colortemperature_options[] = {
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{ "temperature", "set the temperature in Kelvin", OFFSET(temperature), AV_OPT_TYPE_FLOAT, {.dbl=6500}, 1000, 40000, VF },
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{ "mix", "set the mix with filtered output", OFFSET(mix), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, VF },
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{ "pl", "set the amount of preserving lightness", OFFSET(preserve), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(colortemperature);
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const AVFilter ff_vf_colortemperature = {
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.name = "colortemperature",
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.description = NULL_IF_CONFIG_SMALL("Adjust color temperature of video."),
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.priv_size = sizeof(ColorTemperatureContext),
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.priv_class = &colortemperature_class,
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FILTER_INPUTS(inputs),
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FILTER_OUTPUTS(ff_video_default_filterpad),
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FILTER_PIXFMTS_ARRAY(pixel_fmts),
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
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.process_command = ff_filter_process_command,
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};
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