| /* |
| * Copyright (c) 2021 Paul B Mahol |
| * |
| * 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 <float.h> |
| |
| #include "libavutil/opt.h" |
| #include "libavutil/imgutils.h" |
| #include "avfilter.h" |
| #include "drawutils.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| #define R 0 |
| #define G 1 |
| #define B 2 |
| |
| typedef struct ColorTemperatureContext { |
| const AVClass *class; |
| |
| float temperature; |
| float mix; |
| float preserve; |
| |
| float color[3]; |
| |
| int step; |
| int depth; |
| uint8_t rgba_map[4]; |
| |
| int (*do_slice)(AVFilterContext *s, void *arg, |
| int jobnr, int nb_jobs); |
| } ColorTemperatureContext; |
| |
| static float saturate(float input) |
| { |
| return av_clipf(input, 0.f, 1.f); |
| } |
| |
| static void kelvin2rgb(float k, float *rgb) |
| { |
| float kelvin = k / 100.0f; |
| |
| if (kelvin <= 66.0f) { |
| rgb[0] = 1.0f; |
| rgb[1] = saturate(0.39008157876901960784f * logf(kelvin) - 0.63184144378862745098f); |
| } else { |
| const float t = fmaxf(kelvin - 60.0f, 0.0f); |
| rgb[0] = saturate(1.29293618606274509804f * powf(t, -0.1332047592f)); |
| rgb[1] = saturate(1.12989086089529411765f * powf(t, -0.0755148492f)); |
| } |
| |
| if (kelvin >= 66.0f) |
| rgb[2] = 1.0f; |
| else if (kelvin <= 19.0f) |
| rgb[2] = 0.0f; |
| else |
| rgb[2] = saturate(0.54320678911019607843f * logf(kelvin - 10.0f) - 1.19625408914f); |
| } |
| |
| static float lerpf(float v0, float v1, float f) |
| { |
| return v0 + (v1 - v0) * f; |
| } |
| |
| #define PROCESS() \ |
| nr = r * color[0]; \ |
| ng = g * color[1]; \ |
| nb = b * color[2]; \ |
| \ |
| nr = lerpf(r, nr, mix); \ |
| ng = lerpf(g, ng, mix); \ |
| nb = lerpf(b, nb, mix); \ |
| \ |
| l0 = (FFMAX3(r, g, b) + FFMIN3(r, g, b)) + FLT_EPSILON; \ |
| l1 = (FFMAX3(nr, ng, nb) + FFMIN3(nr, ng, nb)) + FLT_EPSILON; \ |
| l = l0 / l1; \ |
| \ |
| r = nr * l; \ |
| g = ng * l; \ |
| b = nb * l; \ |
| \ |
| nr = lerpf(nr, r, preserve); \ |
| ng = lerpf(ng, g, preserve); \ |
| nb = lerpf(nb, b, preserve); |
| |
| static int temperature_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ColorTemperatureContext *s = ctx->priv; |
| AVFrame *frame = arg; |
| const int width = frame->width; |
| const int height = frame->height; |
| const float mix = s->mix; |
| const float preserve = s->preserve; |
| const float *color = s->color; |
| const int slice_start = (height * jobnr) / nb_jobs; |
| const int slice_end = (height * (jobnr + 1)) / nb_jobs; |
| const int glinesize = frame->linesize[0]; |
| const int blinesize = frame->linesize[1]; |
| const int rlinesize = frame->linesize[2]; |
| uint8_t *gptr = frame->data[0] + slice_start * glinesize; |
| uint8_t *bptr = frame->data[1] + slice_start * blinesize; |
| uint8_t *rptr = frame->data[2] + slice_start * rlinesize; |
| |
| for (int y = slice_start; y < slice_end; y++) { |
| for (int x = 0; x < width; x++) { |
| float g = gptr[x]; |
| float b = bptr[x]; |
| float r = rptr[x]; |
| float nr, ng, nb; |
| float l0, l1, l; |
| |
| PROCESS() |
| |
| gptr[x] = av_clip_uint8(ng); |
| bptr[x] = av_clip_uint8(nb); |
| rptr[x] = av_clip_uint8(nr); |
| } |
| |
| gptr += glinesize; |
| bptr += blinesize; |
| rptr += rlinesize; |
| } |
| |
| return 0; |
| } |
| |
| static int temperature_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ColorTemperatureContext *s = ctx->priv; |
| AVFrame *frame = arg; |
| const int depth = s->depth; |
| const int width = frame->width; |
| const int height = frame->height; |
| const float preserve = s->preserve; |
| const float mix = s->mix; |
| const float *color = s->color; |
| const int slice_start = (height * jobnr) / nb_jobs; |
| const int slice_end = (height * (jobnr + 1)) / nb_jobs; |
| const int glinesize = frame->linesize[0] / sizeof(uint16_t); |
| const int blinesize = frame->linesize[1] / sizeof(uint16_t); |
| const int rlinesize = frame->linesize[2] / sizeof(uint16_t); |
| uint16_t *gptr = (uint16_t *)frame->data[0] + slice_start * glinesize; |
| uint16_t *bptr = (uint16_t *)frame->data[1] + slice_start * blinesize; |
| uint16_t *rptr = (uint16_t *)frame->data[2] + slice_start * rlinesize; |
| |
| for (int y = slice_start; y < slice_end; y++) { |
| for (int x = 0; x < width; x++) { |
| float g = gptr[x]; |
| float b = bptr[x]; |
| float r = rptr[x]; |
| float nr, ng, nb; |
| float l0, l1, l; |
| |
| PROCESS() |
| |
| gptr[x] = av_clip_uintp2_c(ng, depth); |
| bptr[x] = av_clip_uintp2_c(nb, depth); |
| rptr[x] = av_clip_uintp2_c(nr, depth); |
| } |
| |
| gptr += glinesize; |
| bptr += blinesize; |
| rptr += rlinesize; |
| } |
| |
| return 0; |
| } |
| |
| static int temperature_slice8p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ColorTemperatureContext *s = ctx->priv; |
| AVFrame *frame = arg; |
| const int step = s->step; |
| const int width = frame->width; |
| const int height = frame->height; |
| const float mix = s->mix; |
| const float preserve = s->preserve; |
| const float *color = s->color; |
| const uint8_t roffset = s->rgba_map[R]; |
| const uint8_t goffset = s->rgba_map[G]; |
| const uint8_t boffset = s->rgba_map[B]; |
| const int slice_start = (height * jobnr) / nb_jobs; |
| const int slice_end = (height * (jobnr + 1)) / nb_jobs; |
| const int linesize = frame->linesize[0]; |
| uint8_t *ptr = frame->data[0] + slice_start * linesize; |
| |
| for (int y = slice_start; y < slice_end; y++) { |
| for (int x = 0; x < width; x++) { |
| float g = ptr[x * step + goffset]; |
| float b = ptr[x * step + boffset]; |
| float r = ptr[x * step + roffset]; |
| float nr, ng, nb; |
| float l0, l1, l; |
| |
| PROCESS() |
| |
| ptr[x * step + goffset] = av_clip_uint8(ng); |
| ptr[x * step + boffset] = av_clip_uint8(nb); |
| ptr[x * step + roffset] = av_clip_uint8(nr); |
| } |
| |
| ptr += linesize; |
| } |
| |
| return 0; |
| } |
| |
| static int temperature_slice16p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ColorTemperatureContext *s = ctx->priv; |
| AVFrame *frame = arg; |
| const int step = s->step; |
| const int depth = s->depth; |
| const int width = frame->width; |
| const int height = frame->height; |
| const float preserve = s->preserve; |
| const float mix = s->mix; |
| const float *color = s->color; |
| const uint8_t roffset = s->rgba_map[R]; |
| const uint8_t goffset = s->rgba_map[G]; |
| const uint8_t boffset = s->rgba_map[B]; |
| const int slice_start = (height * jobnr) / nb_jobs; |
| const int slice_end = (height * (jobnr + 1)) / nb_jobs; |
| const int linesize = frame->linesize[0] / sizeof(uint16_t); |
| uint16_t *ptr = (uint16_t *)frame->data[0] + slice_start * linesize; |
| |
| for (int y = slice_start; y < slice_end; y++) { |
| for (int x = 0; x < width; x++) { |
| float g = ptr[x * step + goffset]; |
| float b = ptr[x * step + boffset]; |
| float r = ptr[x * step + roffset]; |
| float nr, ng, nb; |
| float l0, l1, l; |
| |
| PROCESS() |
| |
| ptr[x * step + goffset] = av_clip_uintp2_c(ng, depth); |
| ptr[x * step + boffset] = av_clip_uintp2_c(nb, depth); |
| ptr[x * step + roffset] = av_clip_uintp2_c(nr, depth); |
| } |
| |
| ptr += linesize; |
| } |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| ColorTemperatureContext *s = ctx->priv; |
| |
| kelvin2rgb(s->temperature, s->color); |
| |
| ctx->internal->execute(ctx, s->do_slice, frame, NULL, |
| FFMIN(frame->height, ff_filter_get_nb_threads(ctx))); |
| |
| return ff_filter_frame(ctx->outputs[0], frame); |
| } |
| |
| static av_cold int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pixel_fmts[] = { |
| AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, |
| AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, |
| AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, |
| AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR, |
| AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0, |
| AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, |
| AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12, |
| AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
| AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
| AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48, |
| AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64, |
| AV_PIX_FMT_NONE |
| }; |
| |
| AVFilterFormats *formats = NULL; |
| |
| formats = ff_make_format_list(pixel_fmts); |
| if (!formats) |
| return AVERROR(ENOMEM); |
| |
| return ff_set_common_formats(ctx, formats); |
| } |
| |
| static av_cold int config_input(AVFilterLink *inlink) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| ColorTemperatureContext *s = ctx->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| int planar = desc->flags & AV_PIX_FMT_FLAG_PLANAR; |
| |
| s->step = desc->nb_components; |
| if (inlink->format == AV_PIX_FMT_RGB0 || |
| inlink->format == AV_PIX_FMT_0RGB || |
| inlink->format == AV_PIX_FMT_BGR0 || |
| inlink->format == AV_PIX_FMT_0BGR) |
| s->step = 4; |
| |
| s->depth = desc->comp[0].depth; |
| s->do_slice = s->depth <= 8 ? temperature_slice8 : temperature_slice16; |
| if (!planar) |
| s->do_slice = s->depth <= 8 ? temperature_slice8p : temperature_slice16p; |
| |
| ff_fill_rgba_map(s->rgba_map, inlink->format); |
| |
| return 0; |
| } |
| |
| static const AVFilterPad inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| .config_props = config_input, |
| .needs_writable = 1, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| #define OFFSET(x) offsetof(ColorTemperatureContext, x) |
| #define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
| |
| static const AVOption colortemperature_options[] = { |
| { "temperature", "set the temperature in Kelvin", OFFSET(temperature), AV_OPT_TYPE_FLOAT, {.dbl=6500}, 1000, 40000, VF }, |
| { "mix", "set the mix with filtered output", OFFSET(mix), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, VF }, |
| { "pl", "set the amount of preserving lightness", OFFSET(preserve), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(colortemperature); |
| |
| AVFilter ff_vf_colortemperature = { |
| .name = "colortemperature", |
| .description = NULL_IF_CONFIG_SMALL("Adjust color temperature of video."), |
| .priv_size = sizeof(ColorTemperatureContext), |
| .priv_class = &colortemperature_class, |
| .query_formats = query_formats, |
| .inputs = inputs, |
| .outputs = outputs, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, |
| .process_command = ff_filter_process_command, |
| }; |