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 #define OFFSET(x) offsetof(ColorLevelsContext, x)
51 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
52 static const AVOption colorlevels_options[] = {
53 { "rimin", "set input red black point", OFFSET(range[R].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
54 { "gimin", "set input green black point", OFFSET(range[G].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
55 { "bimin", "set input blue black point", OFFSET(range[B].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
56 { "aimin", "set input alpha black point", OFFSET(range[A].in_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
57 { "rimax", "set input red white point", OFFSET(range[R].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
58 { "gimax", "set input green white point", OFFSET(range[G].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
59 { "bimax", "set input blue white point", OFFSET(range[B].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
60 { "aimax", "set input alpha white point", OFFSET(range[A].in_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -1, 1, FLAGS },
61 { "romin", "set output red black point", OFFSET(range[R].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
62 { "gomin", "set output green black point", OFFSET(range[G].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
63 { "bomin", "set output blue black point", OFFSET(range[B].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
64 { "aomin", "set output alpha black point", OFFSET(range[A].out_min), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 1, FLAGS },
65 { "romax", "set output red white point", OFFSET(range[R].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
66 { "gomax", "set output green white point", OFFSET(range[G].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
67 { "bomax", "set output blue white point", OFFSET(range[B].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
68 { "aomax", "set output alpha white point", OFFSET(range[A].out_max), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
72 AVFILTER_DEFINE_CLASS(colorlevels);
74 static int query_formats(AVFilterContext *ctx)
76 static const enum AVPixelFormat pix_fmts[] = {
77 AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
78 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
79 AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
80 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
81 AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
82 AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
83 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
87 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
89 return AVERROR(ENOMEM);
90 return ff_set_common_formats(ctx, fmts_list);
93 static int config_input(AVFilterLink *inlink)
95 AVFilterContext *ctx = inlink->dst;
96 ColorLevelsContext *s = ctx->priv;
97 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
99 s->nb_comp = desc->nb_components;
100 s->bpp = desc->comp[0].depth >> 3;
101 s->step = (av_get_padded_bits_per_pixel(desc) >> 3) / s->bpp;
102 s->linesize = inlink->w * s->step;
103 ff_fill_rgba_map(s->rgba_map, inlink->format);
108 typedef struct ThreadData {
109 const uint8_t *srcrow;
123 #define LOAD_COMMON \
124 ColorLevelsContext *s = ctx->priv; \
125 const ThreadData *td = arg; \
127 int process_h = td->h; \
128 const int slice_start = (process_h * jobnr ) / nb_jobs; \
129 const int slice_end = (process_h * (jobnr+1)) / nb_jobs; \
131 const uint8_t *srcrow = td->srcrow; \
132 uint8_t *dstrow = td->dstrow; \
133 const int step = s->step; \
134 const uint8_t offset = td->offset; \
136 int imin = td->imin; \
137 int omin = td->omin; \
138 float coeff = td->coeff;
140 static int colorlevel_slice_8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
144 for (y = slice_start; y < slice_end; y++) {
145 const uint8_t *src = srcrow + y * td->src_linesize;
146 uint8_t *dst = dstrow + y * td->dst_linesize;
148 for (x = 0; x < s->linesize; x += step)
149 dst[x + offset] = av_clip_uint8((src[x + offset] - imin) * coeff + omin);
155 static int colorlevel_slice_16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
159 for (y = slice_start; y < slice_end; y++) {
160 const uint16_t *src = (const uint16_t *)(srcrow + y * td->src_linesize);
161 uint16_t *dst = (uint16_t *)(dstrow + y * td->dst_linesize);
163 for (x = 0; x < s->linesize; x += step)
164 dst[x + offset] = av_clip_uint16((src[x + offset] - imin) * coeff + omin);
170 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
172 AVFilterContext *ctx = inlink->dst;
173 ColorLevelsContext *s = ctx->priv;
174 AVFilterLink *outlink = ctx->outputs[0];
175 const int step = s->step;
179 if (av_frame_is_writable(in)) {
182 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
185 return AVERROR(ENOMEM);
187 av_frame_copy_props(out, in);
192 for (i = 0; i < s->nb_comp; i++) {
193 Range *r = &s->range[i];
194 const uint8_t offset = s->rgba_map[i];
195 const uint8_t *srcrow = in->data[0];
196 uint8_t *dstrow = out->data[0];
197 int imin = lrint(r->in_min * UINT8_MAX);
198 int imax = lrint(r->in_max * UINT8_MAX);
199 int omin = lrint(r->out_min * UINT8_MAX);
200 int omax = lrint(r->out_max * UINT8_MAX);
206 for (y = 0; y < inlink->h; y++) {
207 const uint8_t *src = srcrow;
209 for (x = 0; x < s->linesize; x += step)
210 imin = FFMIN(imin, src[x + offset]);
211 srcrow += in->linesize[0];
215 srcrow = in->data[0];
217 for (y = 0; y < inlink->h; y++) {
218 const uint8_t *src = srcrow;
220 for (x = 0; x < s->linesize; x += step)
221 imax = FFMAX(imax, src[x + offset]);
222 srcrow += in->linesize[0];
226 srcrow = in->data[0];
227 coeff = (omax - omin) / (double)(imax - imin);
231 td.dst_linesize = out->linesize[0];
232 td.src_linesize = in->linesize[0];
239 ctx->internal->execute(ctx, colorlevel_slice_8, &td, NULL,
240 FFMIN(inlink->h, ff_filter_get_nb_threads(ctx)));
244 for (i = 0; i < s->nb_comp; i++) {
245 Range *r = &s->range[i];
246 const uint8_t offset = s->rgba_map[i];
247 const uint8_t *srcrow = in->data[0];
248 uint8_t *dstrow = out->data[0];
249 int imin = lrint(r->in_min * UINT16_MAX);
250 int imax = lrint(r->in_max * UINT16_MAX);
251 int omin = lrint(r->out_min * UINT16_MAX);
252 int omax = lrint(r->out_max * UINT16_MAX);
258 for (y = 0; y < inlink->h; y++) {
259 const uint16_t *src = (const uint16_t *)srcrow;
261 for (x = 0; x < s->linesize; x += step)
262 imin = FFMIN(imin, src[x + offset]);
263 srcrow += in->linesize[0];
267 srcrow = in->data[0];
269 for (y = 0; y < inlink->h; y++) {
270 const uint16_t *src = (const uint16_t *)srcrow;
272 for (x = 0; x < s->linesize; x += step)
273 imax = FFMAX(imax, src[x + offset]);
274 srcrow += in->linesize[0];
278 srcrow = in->data[0];
279 coeff = (omax - omin) / (double)(imax - imin);
283 td.dst_linesize = out->linesize[0];
284 td.src_linesize = in->linesize[0];
291 ctx->internal->execute(ctx, colorlevel_slice_16, &td, NULL,
292 FFMIN(inlink->h, ff_filter_get_nb_threads(ctx)));
298 return ff_filter_frame(outlink, out);
301 static const AVFilterPad colorlevels_inputs[] = {
304 .type = AVMEDIA_TYPE_VIDEO,
305 .filter_frame = filter_frame,
306 .config_props = config_input,
311 static const AVFilterPad colorlevels_outputs[] = {
314 .type = AVMEDIA_TYPE_VIDEO,
319 AVFilter ff_vf_colorlevels = {
320 .name = "colorlevels",
321 .description = NULL_IF_CONFIG_SMALL("Adjust the color levels."),
322 .priv_size = sizeof(ColorLevelsContext),
323 .priv_class = &colorlevels_class,
324 .query_formats = query_formats,
325 .inputs = colorlevels_inputs,
326 .outputs = colorlevels_outputs,
327 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
328 .process_command = ff_filter_process_command,