254 lines
9.2 KiB
C
254 lines
9.2 KiB
C
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/*
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* Copyright (c) 2018 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 "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct VibranceContext {
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const AVClass *class;
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float intensity;
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float balance[3];
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float lcoeffs[3];
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int alternate;
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int depth;
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int (*do_slice)(AVFilterContext *s, void *arg,
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int jobnr, int nb_jobs);
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} VibranceContext;
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static inline 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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static int vibrance_slice8(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
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{
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VibranceContext *s = avctx->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 scale = 1.f / 255.f;
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const float gc = s->lcoeffs[0];
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const float bc = s->lcoeffs[1];
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const float rc = s->lcoeffs[2];
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const float intensity = s->intensity;
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const float alternate = s->alternate ? 1.f : -1.f;
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const float gintensity = intensity * s->balance[0];
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const float bintensity = intensity * s->balance[1];
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const float rintensity = intensity * s->balance[2];
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const float sgintensity = alternate * FFSIGN(gintensity);
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const float sbintensity = alternate * FFSIGN(bintensity);
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const float srintensity = alternate * FFSIGN(rintensity);
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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 int glinesize = frame->linesize[0];
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const int blinesize = frame->linesize[1];
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const int 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] * scale;
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float b = bptr[x] * scale;
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float r = rptr[x] * scale;
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float max_color = FFMAX3(r, g, b);
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float min_color = FFMIN3(r, g, b);
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float color_saturation = max_color - min_color;
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float luma = g * gc + r * rc + b * bc;
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const float cg = 1.f + gintensity * (1.f - sgintensity * color_saturation);
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const float cb = 1.f + bintensity * (1.f - sbintensity * color_saturation);
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const float cr = 1.f + rintensity * (1.f - srintensity * color_saturation);
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g = lerpf(luma, g, cg);
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b = lerpf(luma, b, cb);
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r = lerpf(luma, r, cr);
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gptr[x] = av_clip_uint8(g * 255.f);
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bptr[x] = av_clip_uint8(b * 255.f);
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rptr[x] = av_clip_uint8(r * 255.f);
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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 vibrance_slice16(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
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{
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VibranceContext *s = avctx->priv;
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AVFrame *frame = arg;
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const int depth = s->depth;
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const float max = (1 << depth) - 1;
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const float scale = 1.f / max;
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const float gc = s->lcoeffs[0];
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const float bc = s->lcoeffs[1];
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const float rc = s->lcoeffs[2];
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const int width = frame->width;
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const int height = frame->height;
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const float intensity = s->intensity;
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const float alternate = s->alternate ? 1.f : -1.f;
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const float gintensity = intensity * s->balance[0];
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const float bintensity = intensity * s->balance[1];
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const float rintensity = intensity * s->balance[2];
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const float sgintensity = alternate * FFSIGN(gintensity);
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const float sbintensity = alternate * FFSIGN(bintensity);
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const float srintensity = alternate * FFSIGN(rintensity);
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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 int glinesize = frame->linesize[0] / 2;
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const int blinesize = frame->linesize[1] / 2;
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const int rlinesize = frame->linesize[2] / 2;
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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] * scale;
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float b = bptr[x] * scale;
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float r = rptr[x] * scale;
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float max_color = FFMAX3(r, g, b);
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float min_color = FFMIN3(r, g, b);
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float color_saturation = max_color - min_color;
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float luma = g * gc + r * rc + b * bc;
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const float cg = 1.f + gintensity * (1.f - sgintensity * color_saturation);
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const float cb = 1.f + bintensity * (1.f - sbintensity * color_saturation);
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const float cr = 1.f + rintensity * (1.f - srintensity * color_saturation);
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g = lerpf(luma, g, cg);
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b = lerpf(luma, b, cb);
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r = lerpf(luma, r, cr);
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gptr[x] = av_clip_uintp2_c(g * max, depth);
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bptr[x] = av_clip_uintp2_c(b * max, depth);
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rptr[x] = av_clip_uintp2_c(r * max, 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 filter_frame(AVFilterLink *link, AVFrame *frame)
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{
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AVFilterContext *avctx = link->dst;
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VibranceContext *s = avctx->priv;
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int res;
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if (res = avctx->internal->execute(avctx, s->do_slice, frame, NULL,
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FFMIN(frame->height, ff_filter_get_nb_threads(avctx))))
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return res;
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return ff_filter_frame(avctx->outputs[0], frame);
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}
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static av_cold int query_formats(AVFilterContext *avctx)
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{
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static const enum AVPixelFormat pixel_fmts[] = {
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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_NONE
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};
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AVFilterFormats *formats = NULL;
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formats = ff_make_format_list(pixel_fmts);
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if (!formats)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(avctx, formats);
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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 *avctx = inlink->dst;
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VibranceContext *s = avctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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s->depth = desc->comp[0].depth;
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s->do_slice = s->depth <= 8 ? vibrance_slice8 : vibrance_slice16;
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return 0;
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}
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static const AVFilterPad vibrance_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.needs_writable = 1,
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.filter_frame = filter_frame,
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.config_props = config_input,
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},
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{ NULL }
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};
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static const AVFilterPad vibrance_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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#define OFFSET(x) offsetof(VibranceContext, 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 vibrance_options[] = {
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{ "intensity", "set the intensity value", OFFSET(intensity), AV_OPT_TYPE_FLOAT, {.dbl=0}, -2, 2, VF },
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{ "rbal", "set the red balance value", OFFSET(balance[2]), AV_OPT_TYPE_FLOAT, {.dbl=1}, -10, 10, VF },
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{ "gbal", "set the green balance value", OFFSET(balance[0]), AV_OPT_TYPE_FLOAT, {.dbl=1}, -10, 10, VF },
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{ "bbal", "set the blue balance value", OFFSET(balance[1]), AV_OPT_TYPE_FLOAT, {.dbl=1}, -10, 10, VF },
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{ "rlum", "set the red luma coefficient", OFFSET(lcoeffs[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.072186}, 0, 1, VF },
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{ "glum", "set the green luma coefficient", OFFSET(lcoeffs[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.715158}, 0, 1, VF },
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{ "blum", "set the blue luma coefficient", OFFSET(lcoeffs[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.212656}, 0, 1, VF },
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{ "alternate", "use alternate colors", OFFSET(alternate), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, VF },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(vibrance);
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AVFilter ff_vf_vibrance = {
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.name = "vibrance",
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.description = NULL_IF_CONFIG_SMALL("Boost or alter saturation."),
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.priv_size = sizeof(VibranceContext),
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.priv_class = &vibrance_class,
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.query_formats = query_formats,
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.inputs = vibrance_inputs,
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.outputs = vibrance_outputs,
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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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