2 * Copyright (c) 2013 Paul B Mahol
4 * This file is part of FFmpeg.
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.
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.
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
21 #include "libavutil/imgutils.h"
22 #include "libavutil/opt.h"
23 #include "libavutil/pixdesc.h"
25 #include "drawutils.h"
35 typedef struct Range {
36 double in_min, in_max;
37 double out_min, out_max;
40 typedef struct ColorLevelsContext {
50 int (*colorlevels_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
53 #define OFFSET(x) offsetof(ColorLevelsContext, x)
54 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
55 static const AVOption colorlevels_options[] = {
56 { "rimin", "set input red black point", OFFSET(range[R].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
57 { "gimin", "set input green black point", OFFSET(range[G].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
58 { "bimin", "set input blue black point", OFFSET(range[B].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
59 { "aimin", "set input alpha black point", OFFSET(range[A].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
60 { "rimax", "set input red white point", OFFSET(range[R].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
61 { "gimax", "set input green white point", OFFSET(range[G].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
62 { "bimax", "set input blue white point", OFFSET(range[B].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
63 { "aimax", "set input alpha white point", OFFSET(range[A].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
64 { "romin", "set output red black point", OFFSET(range[R].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
65 { "gomin", "set output green black point", OFFSET(range[G].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
66 { "bomin", "set output blue black point", OFFSET(range[B].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
67 { "aomin", "set output alpha black point", OFFSET(range[A].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
68 { "romax", "set output red white point", OFFSET(range[R].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
69 { "gomax", "set output green white point", OFFSET(range[G].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
70 { "bomax", "set output blue white point", OFFSET(range[B].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
71 { "aomax", "set output alpha white point", OFFSET(range[A].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
75 AVFILTER_DEFINE_CLASS(colorlevels);
77 static int query_formats(AVFilterContext *ctx)
79 static const enum AVPixelFormat pix_fmts[] = {
80 AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
81 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
82 AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
83 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
84 AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
85 AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
86 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
90 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
92 return AVERROR(ENOMEM);
93 return ff_set_common_formats(ctx, fmts_list);
96 typedef struct ThreadData {
97 const uint8_t *srcrow;
110 #define LOAD_COMMON \
111 ColorLevelsContext *s = ctx->priv; \
112 const ThreadData *td = arg; \
113 const int process_h = td->h; \
114 const int slice_start = (process_h * jobnr ) / nb_jobs; \
115 const int slice_end = (process_h * (jobnr+1)) / nb_jobs; \
116 const uint8_t *srcrow = td->srcrow; \
117 uint8_t *dstrow = td->dstrow; \
118 const int step = s->step;
120 static int colorlevels_slice_8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
124 for (int comp = 0; comp < s->nb_comp; comp++) {
125 const uint8_t offset = s->rgba_map[comp];
126 const int imin = td->imin[comp];
127 const int omin = td->omin[comp];
128 const float coeff = td->coeff[comp];
130 for (int y = slice_start; y < slice_end; y++) {
131 const uint8_t *src = srcrow + y * td->src_linesize;
132 uint8_t *dst = dstrow + y * td->dst_linesize;
134 for (int x = 0; x < s->linesize; x += step)
135 dst[x + offset] = av_clip_uint8((src[x + offset] - imin) * coeff + omin);
142 static int colorlevels_slice_16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
146 for (int comp = 0; comp < s->nb_comp; comp++) {
147 const uint8_t offset = s->rgba_map[comp];
148 const int imin = td->imin[comp];
149 const int omin = td->omin[comp];
150 const float coeff = td->coeff[comp];
152 for (int y = slice_start; y < slice_end; y++) {
153 const uint16_t *src = (const uint16_t *)(srcrow + y * td->src_linesize);
154 uint16_t *dst = (uint16_t *)(dstrow + y * td->dst_linesize);
156 for (int x = 0; x < s->linesize; x += step)
157 dst[x + offset] = av_clip_uint16((src[x + offset] - imin) * coeff + omin);
164 static int config_input(AVFilterLink *inlink)
166 AVFilterContext *ctx = inlink->dst;
167 ColorLevelsContext *s = ctx->priv;
168 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
170 s->nb_comp = desc->nb_components;
171 s->bpp = desc->comp[0].depth >> 3;
172 s->step = av_get_padded_bits_per_pixel(desc) >> (3 + (s->bpp == 2));
173 s->linesize = inlink->w * s->step;
174 ff_fill_rgba_map(s->rgba_map, inlink->format);
176 s->colorlevels_slice = colorlevels_slice_8;
178 s->colorlevels_slice = colorlevels_slice_16;
183 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
185 AVFilterContext *ctx = inlink->dst;
186 ColorLevelsContext *s = ctx->priv;
187 AVFilterLink *outlink = ctx->outputs[0];
188 const int step = s->step;
192 if (av_frame_is_writable(in)) {
195 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
198 return AVERROR(ENOMEM);
200 av_frame_copy_props(out, in);
204 td.dst_linesize = out->linesize[0];
205 td.src_linesize = in->linesize[0];
206 td.srcrow = in->data[0];
207 td.dstrow = out->data[0];
211 for (int i = 0; i < s->nb_comp; i++) {
212 Range *r = &s->range[i];
213 const uint8_t offset = s->rgba_map[i];
214 const uint8_t *srcrow = in->data[0];
215 int imin = lrint(r->in_min * UINT8_MAX);
216 int imax = lrint(r->in_max * UINT8_MAX);
217 int omin = lrint(r->out_min * UINT8_MAX);
218 int omax = lrint(r->out_max * UINT8_MAX);
223 for (int y = 0; y < inlink->h; y++) {
224 const uint8_t *src = srcrow;
226 for (int x = 0; x < s->linesize; x += step)
227 imin = FFMIN(imin, src[x + offset]);
228 srcrow += in->linesize[0];
232 srcrow = in->data[0];
234 for (int y = 0; y < inlink->h; y++) {
235 const uint8_t *src = srcrow;
237 for (int x = 0; x < s->linesize; x += step)
238 imax = FFMAX(imax, src[x + offset]);
239 srcrow += in->linesize[0];
243 coeff = (omax - omin) / (double)(imax - imin);
251 for (int i = 0; i < s->nb_comp; i++) {
252 Range *r = &s->range[i];
253 const uint8_t offset = s->rgba_map[i];
254 const uint8_t *srcrow = in->data[0];
255 int imin = lrint(r->in_min * UINT16_MAX);
256 int imax = lrint(r->in_max * UINT16_MAX);
257 int omin = lrint(r->out_min * UINT16_MAX);
258 int omax = lrint(r->out_max * UINT16_MAX);
263 for (int y = 0; y < inlink->h; y++) {
264 const uint16_t *src = (const uint16_t *)srcrow;
266 for (int x = 0; x < s->linesize; x += step)
267 imin = FFMIN(imin, src[x + offset]);
268 srcrow += in->linesize[0];
272 srcrow = in->data[0];
274 for (int y = 0; y < inlink->h; y++) {
275 const uint16_t *src = (const uint16_t *)srcrow;
277 for (int x = 0; x < s->linesize; x += step)
278 imax = FFMAX(imax, src[x + offset]);
279 srcrow += in->linesize[0];
283 coeff = (omax - omin) / (double)(imax - imin);
292 ctx->internal->execute(ctx, s->colorlevels_slice, &td, NULL,
293 FFMIN(inlink->h, ff_filter_get_nb_threads(ctx)));
297 return ff_filter_frame(outlink, out);
300 static const AVFilterPad colorlevels_inputs[] = {
303 .type = AVMEDIA_TYPE_VIDEO,
304 .filter_frame = filter_frame,
305 .config_props = config_input,
310 static const AVFilterPad colorlevels_outputs[] = {
313 .type = AVMEDIA_TYPE_VIDEO,
318 AVFilter ff_vf_colorlevels = {
319 .name = "colorlevels",
320 .description = NULL_IF_CONFIG_SMALL("Adjust the color levels."),
321 .priv_size = sizeof(ColorLevelsContext),
322 .priv_class = &colorlevels_class,
323 .query_formats = query_formats,
324 .inputs = colorlevels_inputs,
325 .outputs = colorlevels_outputs,
326 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
327 .process_command = ff_filter_process_command,