| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2017 Paul B Mahol | ||
| 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/opt.h" | ||
| 22 | #include "libavutil/pixdesc.h" | ||
| 23 | #include "avfilter.h" | ||
| 24 | #include "filters.h" | ||
| 25 | #include "video.h" | ||
| 26 | |||
| 27 | typedef struct LumakeyContext { | ||
| 28 | const AVClass *class; | ||
| 29 | |||
| 30 | double threshold; | ||
| 31 | double tolerance; | ||
| 32 | double softness; | ||
| 33 | |||
| 34 | int white; | ||
| 35 | int black; | ||
| 36 | int so; | ||
| 37 | int max; | ||
| 38 | |||
| 39 | int (*do_lumakey_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); | ||
| 40 | } LumakeyContext; | ||
| 41 | |||
| 42 | ✗ | static int do_lumakey_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) | |
| 43 | { | ||
| 44 | ✗ | LumakeyContext *s = ctx->priv; | |
| 45 | ✗ | AVFrame *frame = arg; | |
| 46 | ✗ | const int slice_start = (frame->height * jobnr) / nb_jobs; | |
| 47 | ✗ | const int slice_end = (frame->height * (jobnr + 1)) / nb_jobs; | |
| 48 | ✗ | uint8_t *alpha = frame->data[3] + slice_start * frame->linesize[3]; | |
| 49 | ✗ | const uint8_t *luma = frame->data[0] + slice_start * frame->linesize[0]; | |
| 50 | ✗ | const int so = s->so; | |
| 51 | ✗ | const int w = s->white; | |
| 52 | ✗ | const int b = s->black; | |
| 53 | int x, y; | ||
| 54 | |||
| 55 | ✗ | for (y = slice_start; y < slice_end; y++) { | |
| 56 | ✗ | for (x = 0; x < frame->width; x++) { | |
| 57 | ✗ | if (luma[x] >= b && luma[x] <= w) { | |
| 58 | ✗ | alpha[x] = 0; | |
| 59 | ✗ | } else if (luma[x] > b - so && luma[x] < w + so) { | |
| 60 | ✗ | if (luma[x] < b) { | |
| 61 | ✗ | alpha[x] = 255 - (luma[x] - b + so) * 255 / so; | |
| 62 | } else { | ||
| 63 | ✗ | alpha[x] = (luma[x] - w) * 255 / so; | |
| 64 | } | ||
| 65 | } | ||
| 66 | } | ||
| 67 | ✗ | luma += frame->linesize[0]; | |
| 68 | ✗ | alpha += frame->linesize[3]; | |
| 69 | } | ||
| 70 | |||
| 71 | ✗ | return 0; | |
| 72 | } | ||
| 73 | |||
| 74 | ✗ | static int do_lumakey_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) | |
| 75 | { | ||
| 76 | ✗ | LumakeyContext *s = ctx->priv; | |
| 77 | ✗ | AVFrame *frame = arg; | |
| 78 | ✗ | const int slice_start = (frame->height * jobnr) / nb_jobs; | |
| 79 | ✗ | const int slice_end = (frame->height * (jobnr + 1)) / nb_jobs; | |
| 80 | ✗ | uint16_t *alpha = (uint16_t *)(frame->data[3] + slice_start * frame->linesize[3]); | |
| 81 | ✗ | const uint16_t *luma = (const uint16_t *)(frame->data[0] + slice_start * frame->linesize[0]); | |
| 82 | ✗ | const int so = s->so; | |
| 83 | ✗ | const int w = s->white; | |
| 84 | ✗ | const int b = s->black; | |
| 85 | ✗ | const int m = s->max; | |
| 86 | int x, y; | ||
| 87 | |||
| 88 | ✗ | for (y = slice_start; y < slice_end; y++) { | |
| 89 | ✗ | for (x = 0; x < frame->width; x++) { | |
| 90 | ✗ | if (luma[x] >= b && luma[x] <= w) { | |
| 91 | ✗ | alpha[x] = 0; | |
| 92 | ✗ | } else if (luma[x] > b - so && luma[x] < w + so) { | |
| 93 | ✗ | if (luma[x] < b) { | |
| 94 | ✗ | alpha[x] = m - (luma[x] - b + so) * m / so; | |
| 95 | } else { | ||
| 96 | ✗ | alpha[x] = (luma[x] - w) * m / so; | |
| 97 | } | ||
| 98 | } | ||
| 99 | } | ||
| 100 | ✗ | luma += frame->linesize[0] / 2; | |
| 101 | ✗ | alpha += frame->linesize[3] / 2; | |
| 102 | } | ||
| 103 | |||
| 104 | ✗ | return 0; | |
| 105 | } | ||
| 106 | |||
| 107 | ✗ | static int config_input(AVFilterLink *inlink) | |
| 108 | { | ||
| 109 | ✗ | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); | |
| 110 | ✗ | AVFilterContext *ctx = inlink->dst; | |
| 111 | ✗ | LumakeyContext *s = ctx->priv; | |
| 112 | int depth; | ||
| 113 | |||
| 114 | ✗ | depth = desc->comp[0].depth; | |
| 115 | ✗ | if (depth == 8) { | |
| 116 | ✗ | s->white = av_clip_uint8((s->threshold + s->tolerance) * 255); | |
| 117 | ✗ | s->black = av_clip_uint8((s->threshold - s->tolerance) * 255); | |
| 118 | ✗ | s->do_lumakey_slice = do_lumakey_slice8; | |
| 119 | ✗ | s->so = s->softness * 255; | |
| 120 | } else { | ||
| 121 | ✗ | s->max = (1 << depth) - 1; | |
| 122 | ✗ | s->white = av_clip((s->threshold + s->tolerance) * s->max, 0, s->max); | |
| 123 | ✗ | s->black = av_clip((s->threshold - s->tolerance) * s->max, 0, s->max); | |
| 124 | ✗ | s->do_lumakey_slice = do_lumakey_slice16; | |
| 125 | ✗ | s->so = s->softness * s->max; | |
| 126 | } | ||
| 127 | |||
| 128 | ✗ | return 0; | |
| 129 | } | ||
| 130 | |||
| 131 | ✗ | static int filter_frame(AVFilterLink *link, AVFrame *frame) | |
| 132 | { | ||
| 133 | ✗ | AVFilterContext *ctx = link->dst; | |
| 134 | ✗ | LumakeyContext *s = ctx->priv; | |
| 135 | int ret; | ||
| 136 | |||
| 137 | ✗ | if (ret = ff_filter_execute(ctx, s->do_lumakey_slice, frame, NULL, | |
| 138 | ✗ | FFMIN(frame->height, ff_filter_get_nb_threads(ctx)))) | |
| 139 | ✗ | return ret; | |
| 140 | |||
| 141 | ✗ | return ff_filter_frame(ctx->outputs[0], frame); | |
| 142 | } | ||
| 143 | |||
| 144 | static const enum AVPixelFormat pixel_fmts[] = { | ||
| 145 | AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P, | ||
| 146 | AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA420P9, | ||
| 147 | AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA420P10, | ||
| 148 | AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA422P12, | ||
| 149 | AV_PIX_FMT_YUVA444P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA420P16, | ||
| 150 | AV_PIX_FMT_NONE | ||
| 151 | }; | ||
| 152 | |||
| 153 | ✗ | static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, | |
| 154 | char *res, int res_len, int flags) | ||
| 155 | { | ||
| 156 | int ret; | ||
| 157 | |||
| 158 | ✗ | ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags); | |
| 159 | ✗ | if (ret < 0) | |
| 160 | ✗ | return ret; | |
| 161 | |||
| 162 | ✗ | return config_input(ctx->inputs[0]); | |
| 163 | } | ||
| 164 | |||
| 165 | static const AVFilterPad lumakey_inputs[] = { | ||
| 166 | { | ||
| 167 | .name = "default", | ||
| 168 | .type = AVMEDIA_TYPE_VIDEO, | ||
| 169 | .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE, | ||
| 170 | .filter_frame = filter_frame, | ||
| 171 | .config_props = config_input, | ||
| 172 | }, | ||
| 173 | }; | ||
| 174 | |||
| 175 | #define OFFSET(x) offsetof(LumakeyContext, x) | ||
| 176 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM | ||
| 177 | |||
| 178 | static const AVOption lumakey_options[] = { | ||
| 179 | { "threshold", "set the threshold value", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS }, | ||
| 180 | { "tolerance", "set the tolerance value", OFFSET(tolerance), AV_OPT_TYPE_DOUBLE, {.dbl=0.01}, 0, 1, FLAGS }, | ||
| 181 | { "softness", "set the softness value", OFFSET(softness), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS }, | ||
| 182 | { NULL } | ||
| 183 | }; | ||
| 184 | |||
| 185 | AVFILTER_DEFINE_CLASS(lumakey); | ||
| 186 | |||
| 187 | const AVFilter ff_vf_lumakey = { | ||
| 188 | .name = "lumakey", | ||
| 189 | .description = NULL_IF_CONFIG_SMALL("Turns a certain luma into transparency."), | ||
| 190 | .priv_size = sizeof(LumakeyContext), | ||
| 191 | .priv_class = &lumakey_class, | ||
| 192 | FILTER_INPUTS(lumakey_inputs), | ||
| 193 | FILTER_OUTPUTS(ff_video_default_filterpad), | ||
| 194 | FILTER_PIXFMTS_ARRAY(pixel_fmts), | ||
| 195 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, | ||
| 196 | .process_command = process_command, | ||
| 197 | }; | ||
| 198 |