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352 lines
12 KiB
352 lines
12 KiB
/* |
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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/intreadwrite.h" |
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#include "libavutil/pixdesc.h" |
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#include "avfilter.h" |
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#include "filters.h" |
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typedef struct HSVKeyContext { |
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const AVClass *class; |
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float hue, hue_opt, sat, val; |
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float similarity; |
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float blend; |
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float scale; |
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float half; |
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int depth; |
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int max; |
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int hsub_log2; |
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int vsub_log2; |
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int (*do_slice)(AVFilterContext *ctx, void *arg, |
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int jobnr, int nb_jobs); |
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} HSVKeyContext; |
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#define SQR(x) ((x)*(x)) |
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static int do_hsvkey_pixel(HSVKeyContext *s, int y, int u, int v, |
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float hue_key, float sat_key, float val_key) |
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{ |
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const float similarity = s->similarity; |
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const float scale = s->scale; |
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const float blend = s->blend; |
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const int imax = s->max; |
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const float max = imax; |
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const float half = s->half; |
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const float uf = u - half; |
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const float vf = v - half; |
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const float hue = hue_key < 0.f ? -hue_key : atan2f(uf, vf) + M_PI; |
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const float sat = sat_key < 0.f ? -sat_key : sqrtf((uf * uf + vf * vf) / (half * half * 2.f)); |
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const float val = val_key < 0.f ? -val_key : scale * y; |
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float diff; |
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hue_key = fabsf(hue_key); |
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sat_key = fabsf(sat_key); |
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val_key = fabsf(val_key); |
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diff = sqrtf(fmaxf(SQR(sat) * SQR(val) + |
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SQR(sat_key) * SQR(val_key) - |
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2.f * sat * val * sat_key * val_key * cosf(hue_key - hue) + |
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SQR(val - val_key), 0.f)); |
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if (diff < similarity) { |
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return 0; |
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} else if (blend > FLT_MIN) { |
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return av_clipf((diff - similarity) / blend, 0.f, 1.f) * max; |
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} else { |
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return imax; |
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} |
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return 0; |
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} |
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static int do_hsvkey_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs) |
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{ |
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HSVKeyContext *s = avctx->priv; |
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AVFrame *frame = arg; |
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const int slice_start = (frame->height * jobnr) / nb_jobs; |
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const int slice_end = (frame->height * (jobnr + 1)) / nb_jobs; |
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const int hsub_log2 = s->hsub_log2; |
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const int vsub_log2 = s->vsub_log2; |
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const float hue = s->hue; |
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const float sat = s->sat; |
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const float val = s->val; |
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for (int y = slice_start; y < slice_end; y++) { |
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for (int x = 0; x < frame->width; x++) { |
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int Y = frame->data[0][frame->linesize[0] * y + x]; |
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int u = frame->data[1][frame->linesize[1] * (y >> vsub_log2) + (x >> hsub_log2)]; |
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int v = frame->data[2][frame->linesize[2] * (y >> vsub_log2) + (x >> hsub_log2)]; |
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frame->data[3][frame->linesize[3] * y + x] = do_hsvkey_pixel(s, Y, u, v, hue, sat, val); |
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} |
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} |
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return 0; |
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} |
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static int do_hsvkey16_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs) |
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{ |
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HSVKeyContext *s = avctx->priv; |
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AVFrame *frame = arg; |
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const int slice_start = (frame->height * jobnr) / nb_jobs; |
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const int slice_end = (frame->height * (jobnr + 1)) / nb_jobs; |
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const int hsub_log2 = s->hsub_log2; |
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const int vsub_log2 = s->vsub_log2; |
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const float hue = s->hue; |
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const float sat = s->sat; |
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const float val = s->val; |
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for (int y = slice_start; y < slice_end; ++y) { |
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for (int x = 0; x < frame->width; ++x) { |
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uint16_t *dst = (uint16_t *)(frame->data[3] + frame->linesize[3] * y); |
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int Y = AV_RN16(&frame->data[0][frame->linesize[0] * y + 2 * x]); |
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int u = AV_RN16(&frame->data[1][frame->linesize[1] * (y >> vsub_log2) + 2 * (x >> hsub_log2)]); |
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int v = AV_RN16(&frame->data[2][frame->linesize[2] * (y >> vsub_log2) + 2 * (x >> hsub_log2)]); |
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dst[x] = do_hsvkey_pixel(s, Y, u, v, hue, sat, val); |
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} |
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} |
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return 0; |
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} |
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static int do_hsvhold_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs) |
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{ |
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HSVKeyContext *s = avctx->priv; |
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AVFrame *frame = arg; |
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const int hsub_log2 = s->hsub_log2; |
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const int vsub_log2 = s->vsub_log2; |
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const int width = frame->width >> hsub_log2; |
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const int height = frame->height >> vsub_log2; |
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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 float scale = s->scale; |
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const float hue = s->hue; |
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const float sat = s->sat; |
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const float val = s->val; |
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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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uint8_t *dstu = frame->data[1] + frame->linesize[1] * y; |
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uint8_t *dstv = frame->data[2] + frame->linesize[2] * y; |
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int Y = frame->data[0][frame->linesize[0] * (y << vsub_log2) + (x << hsub_log2)]; |
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int u = frame->data[1][frame->linesize[1] * y + x]; |
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int v = frame->data[2][frame->linesize[2] * y + x]; |
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int t = do_hsvkey_pixel(s, Y, u, v, hue, sat, val); |
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if (t > 0) { |
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float f = 1.f - t * scale; |
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dstu[x] = 128 + (u - 128) * f; |
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dstv[x] = 128 + (v - 128) * f; |
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} |
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} |
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} |
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return 0; |
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} |
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static int do_hsvhold16_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs) |
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{ |
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HSVKeyContext *s = avctx->priv; |
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AVFrame *frame = arg; |
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const int hsub_log2 = s->hsub_log2; |
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const int vsub_log2 = s->vsub_log2; |
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const int width = frame->width >> hsub_log2; |
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const int height = frame->height >> vsub_log2; |
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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 float scale = s->scale; |
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const float half = s->half; |
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const float hue = s->hue; |
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const float sat = s->sat; |
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const float val = s->val; |
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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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uint16_t *dstu = (uint16_t *)(frame->data[1] + frame->linesize[1] * y); |
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uint16_t *dstv = (uint16_t *)(frame->data[2] + frame->linesize[2] * y); |
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int Y = AV_RN16(&frame->data[0][frame->linesize[0] * (y << vsub_log2) + 2 * (x << hsub_log2)]); |
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int u = AV_RN16(&frame->data[1][frame->linesize[1] * y + 2 * x]); |
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int v = AV_RN16(&frame->data[2][frame->linesize[2] * y + 2 * x]); |
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int t = do_hsvkey_pixel(s, Y, u, v, hue, sat, val); |
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if (t > 0) { |
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float f = 1.f - t * scale; |
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dstu[x] = half + (u - half) * f; |
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dstv[x] = half + (v - half) * f; |
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} |
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} |
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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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HSVKeyContext *s = avctx->priv; |
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int res; |
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s->hue = FFSIGN(s->hue_opt) *M_PI * fmodf(526.f - fabsf(s->hue_opt), 360.f) / 180.f; |
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if (res = ff_filter_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 config_output(AVFilterLink *outlink) |
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{ |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format); |
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AVFilterContext *avctx = outlink->src; |
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HSVKeyContext *s = avctx->priv; |
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s->depth = desc->comp[0].depth; |
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s->max = (1 << s->depth) - 1; |
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s->half = 0.5f * s->max; |
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s->scale = 1.f / s->max; |
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if (!strcmp(avctx->filter->name, "hsvkey")) { |
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s->do_slice = s->depth <= 8 ? do_hsvkey_slice : do_hsvkey16_slice; |
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} else { |
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s->do_slice = s->depth <= 8 ? do_hsvhold_slice: do_hsvhold16_slice; |
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} |
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return 0; |
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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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HSVKeyContext *s = avctx->priv; |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
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s->hsub_log2 = desc->log2_chroma_w; |
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s->vsub_log2 = desc->log2_chroma_h; |
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return 0; |
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} |
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static const enum AVPixelFormat key_pixel_fmts[] = { |
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AV_PIX_FMT_YUVA420P, |
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AV_PIX_FMT_YUVA422P, |
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AV_PIX_FMT_YUVA444P, |
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, |
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, |
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AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12, |
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AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, |
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AV_PIX_FMT_NONE |
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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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static const AVFilterPad outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = config_output, |
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}, |
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}; |
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#define OFFSET(x) offsetof(HSVKeyContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
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static const AVOption hsvkey_options[] = { |
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{ "hue", "set the hue value", OFFSET(hue_opt), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -360, 360, FLAGS }, |
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{ "sat", "set the saturation value", OFFSET(sat), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -1, 1, FLAGS }, |
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{ "val", "set the value value", OFFSET(val), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -1, 1, FLAGS }, |
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{ "similarity", "set the hsvkey similarity value", OFFSET(similarity), AV_OPT_TYPE_FLOAT, { .dbl = 0.01}, 0.00001, 1.0, FLAGS }, |
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{ "blend", "set the hsvkey blend value", OFFSET(blend), AV_OPT_TYPE_FLOAT, { .dbl = 0.0 }, 0.0, 1.0, FLAGS }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(hsvkey); |
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const AVFilter ff_vf_hsvkey = { |
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.name = "hsvkey", |
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.description = NULL_IF_CONFIG_SMALL("Turns a certain HSV range into transparency. Operates on YUV colors."), |
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.priv_size = sizeof(HSVKeyContext), |
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.priv_class = &hsvkey_class, |
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FILTER_INPUTS(inputs), |
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FILTER_OUTPUTS(outputs), |
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FILTER_PIXFMTS_ARRAY(key_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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static const enum AVPixelFormat hold_pixel_fmts[] = { |
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AV_PIX_FMT_YUV420P, |
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AV_PIX_FMT_YUV422P, |
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AV_PIX_FMT_YUV444P, |
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AV_PIX_FMT_YUVA420P, |
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AV_PIX_FMT_YUVA422P, |
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AV_PIX_FMT_YUVA444P, |
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, |
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AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, |
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AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12, |
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AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14, |
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, |
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, |
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AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12, |
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AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, |
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AV_PIX_FMT_NONE |
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}; |
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static const AVOption hsvhold_options[] = { |
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{ "hue", "set the hue value", OFFSET(hue_opt), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -360, 360, FLAGS }, |
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{ "sat", "set the saturation value", OFFSET(sat), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -1, 1, FLAGS }, |
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{ "val", "set the value value", OFFSET(val), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -1, 1, FLAGS }, |
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{ "similarity", "set the hsvhold similarity value", OFFSET(similarity), AV_OPT_TYPE_FLOAT, { .dbl = 0.01 }, 0.00001, 1.0, FLAGS }, |
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{ "blend", "set the hsvhold blend value", OFFSET(blend), AV_OPT_TYPE_FLOAT, { .dbl = 0.0 }, 0.0, 1.0, FLAGS }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(hsvhold); |
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const AVFilter ff_vf_hsvhold = { |
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.name = "hsvhold", |
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.description = NULL_IF_CONFIG_SMALL("Turns a certain HSV range into gray."), |
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.priv_size = sizeof(HSVKeyContext), |
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.priv_class = &hsvhold_class, |
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FILTER_INPUTS(inputs), |
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FILTER_OUTPUTS(outputs), |
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FILTER_PIXFMTS_ARRAY(hold_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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