1 /*
2 * Copyright (c) 2018 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/imgutils.h"
23 #include "avfilter.h"
24 #include "formats.h"
25 #include "internal.h"
26 #include "video.h"
27
28 typedef struct VibranceContext {
29 const AVClass *class;
30
31 float intensity;
32 float balance[3];
33 float lcoeffs[3];
34
35 int depth;
36
37 int (*do_slice)(AVFilterContext *s, void *arg,
38 int jobnr, int nb_jobs);
39 } VibranceContext;
40
lerpf(float v0,float v1,float f)41 static inline float lerpf(float v0, float v1, float f)
42 {
43 return v0 + (v1 - v0) * f;
44 }
45
vibrance_slice8(AVFilterContext * avctx,void * arg,int jobnr,int nb_jobs)46 static int vibrance_slice8(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
47 {
48 VibranceContext *s = avctx->priv;
49 AVFrame *frame = arg;
50 const int width = frame->width;
51 const int height = frame->height;
52 const float gc = s->lcoeffs[0];
53 const float bc = s->lcoeffs[1];
54 const float rc = s->lcoeffs[2];
55 const float intensity = s->intensity;
56 const float gintensity = intensity * s->balance[0];
57 const float bintensity = intensity * s->balance[1];
58 const float rintensity = intensity * s->balance[2];
59 const int slice_start = (height * jobnr) / nb_jobs;
60 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
61 const int glinesize = frame->linesize[0];
62 const int blinesize = frame->linesize[1];
63 const int rlinesize = frame->linesize[2];
64 uint8_t *gptr = frame->data[0] + slice_start * glinesize;
65 uint8_t *bptr = frame->data[1] + slice_start * blinesize;
66 uint8_t *rptr = frame->data[2] + slice_start * rlinesize;
67
68 for (int y = slice_start; y < slice_end; y++) {
69 for (int x = 0; x < width; x++) {
70 float g = gptr[x] / 255.f;
71 float b = bptr[x] / 255.f;
72 float r = rptr[x] / 255.f;
73 float max_color = FFMAX3(r, g, b);
74 float min_color = FFMIN3(r, g, b);
75 float color_saturation = max_color - min_color;
76 float luma = g * gc + r * rc + b * bc;
77 const float cg = 1.f + gintensity * (1.f - FFSIGN(gintensity) * color_saturation);
78 const float cb = 1.f + bintensity * (1.f - FFSIGN(bintensity) * color_saturation);
79 const float cr = 1.f + rintensity * (1.f - FFSIGN(rintensity) * color_saturation);
80
81 g = lerpf(luma, g, cg);
82 b = lerpf(luma, b, cb);
83 r = lerpf(luma, r, cr);
84
85 gptr[x] = av_clip_uint8(g * 255.f);
86 bptr[x] = av_clip_uint8(b * 255.f);
87 rptr[x] = av_clip_uint8(r * 255.f);
88 }
89
90 gptr += glinesize;
91 bptr += blinesize;
92 rptr += rlinesize;
93 }
94
95 return 0;
96 }
97
vibrance_slice16(AVFilterContext * avctx,void * arg,int jobnr,int nb_jobs)98 static int vibrance_slice16(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
99 {
100 VibranceContext *s = avctx->priv;
101 AVFrame *frame = arg;
102 const int depth = s->depth;
103 const float max = (1 << depth) - 1;
104 const float gc = s->lcoeffs[0];
105 const float bc = s->lcoeffs[1];
106 const float rc = s->lcoeffs[2];
107 const int width = frame->width;
108 const int height = frame->height;
109 const float intensity = s->intensity;
110 const float gintensity = intensity * s->balance[0];
111 const float bintensity = intensity * s->balance[1];
112 const float rintensity = intensity * s->balance[2];
113 const int slice_start = (height * jobnr) / nb_jobs;
114 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
115 const int glinesize = frame->linesize[0] / 2;
116 const int blinesize = frame->linesize[1] / 2;
117 const int rlinesize = frame->linesize[2] / 2;
118 uint16_t *gptr = (uint16_t *)frame->data[0] + slice_start * glinesize;
119 uint16_t *bptr = (uint16_t *)frame->data[1] + slice_start * blinesize;
120 uint16_t *rptr = (uint16_t *)frame->data[2] + slice_start * rlinesize;
121
122 for (int y = slice_start; y < slice_end; y++) {
123 for (int x = 0; x < width; x++) {
124 float g = gptr[x] / max;
125 float b = bptr[x] / max;
126 float r = rptr[x] / max;
127 float max_color = FFMAX3(r, g, b);
128 float min_color = FFMIN3(r, g, b);
129 float color_saturation = max_color - min_color;
130 float luma = g * gc + r * rc + b * bc;
131 const float cg = 1.f + gintensity * (1.f - FFSIGN(gintensity) * color_saturation);
132 const float cb = 1.f + bintensity * (1.f - FFSIGN(bintensity) * color_saturation);
133 const float cr = 1.f + rintensity * (1.f - FFSIGN(rintensity) * color_saturation);
134
135 g = lerpf(luma, g, cg);
136 b = lerpf(luma, b, cb);
137 r = lerpf(luma, r, cr);
138
139 gptr[x] = av_clip_uintp2_c(g * max, depth);
140 bptr[x] = av_clip_uintp2_c(b * max, depth);
141 rptr[x] = av_clip_uintp2_c(r * max, depth);
142 }
143
144 gptr += glinesize;
145 bptr += blinesize;
146 rptr += rlinesize;
147 }
148
149 return 0;
150 }
151
filter_frame(AVFilterLink * link,AVFrame * frame)152 static int filter_frame(AVFilterLink *link, AVFrame *frame)
153 {
154 AVFilterContext *avctx = link->dst;
155 VibranceContext *s = avctx->priv;
156 int res;
157
158 if (res = avctx->internal->execute(avctx, s->do_slice, frame, NULL,
159 FFMIN(frame->height, ff_filter_get_nb_threads(avctx))))
160 return res;
161
162 return ff_filter_frame(avctx->outputs[0], frame);
163 }
164
query_formats(AVFilterContext * avctx)165 static av_cold int query_formats(AVFilterContext *avctx)
166 {
167 static const enum AVPixelFormat pixel_fmts[] = {
168 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
169 AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
170 AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
171 AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
172 AV_PIX_FMT_NONE
173 };
174
175 AVFilterFormats *formats = NULL;
176
177 formats = ff_make_format_list(pixel_fmts);
178 if (!formats)
179 return AVERROR(ENOMEM);
180
181 return ff_set_common_formats(avctx, formats);
182 }
183
config_input(AVFilterLink * inlink)184 static av_cold int config_input(AVFilterLink *inlink)
185 {
186 AVFilterContext *avctx = inlink->dst;
187 VibranceContext *s = avctx->priv;
188 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
189
190 s->depth = desc->comp[0].depth;
191 s->do_slice = s->depth <= 8 ? vibrance_slice8 : vibrance_slice16;
192
193 return 0;
194 }
195
196 static const AVFilterPad vibrance_inputs[] = {
197 {
198 .name = "default",
199 .type = AVMEDIA_TYPE_VIDEO,
200 .needs_writable = 1,
201 .filter_frame = filter_frame,
202 .config_props = config_input,
203 },
204 { NULL }
205 };
206
207 static const AVFilterPad vibrance_outputs[] = {
208 {
209 .name = "default",
210 .type = AVMEDIA_TYPE_VIDEO,
211 },
212 { NULL }
213 };
214
215 #define OFFSET(x) offsetof(VibranceContext, x)
216 #define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
217
218 static const AVOption vibrance_options[] = {
219 { "intensity", "set the intensity value", OFFSET(intensity), AV_OPT_TYPE_FLOAT, {.dbl=0}, -2, 2, VF },
220 { "rbal", "set the red balance value", OFFSET(balance[2]), AV_OPT_TYPE_FLOAT, {.dbl=1}, -10, 10, VF },
221 { "gbal", "set the green balance value", OFFSET(balance[0]), AV_OPT_TYPE_FLOAT, {.dbl=1}, -10, 10, VF },
222 { "bbal", "set the blue balance value", OFFSET(balance[1]), AV_OPT_TYPE_FLOAT, {.dbl=1}, -10, 10, VF },
223 { "rlum", "set the red luma coefficient", OFFSET(lcoeffs[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.072186}, 0, 1, VF },
224 { "glum", "set the green luma coefficient", OFFSET(lcoeffs[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.715158}, 0, 1, VF },
225 { "blum", "set the blue luma coefficient", OFFSET(lcoeffs[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.212656}, 0, 1, VF },
226 { NULL }
227 };
228
229 AVFILTER_DEFINE_CLASS(vibrance);
230
231 AVFilter ff_vf_vibrance = {
232 .name = "vibrance",
233 .description = NULL_IF_CONFIG_SMALL("Boost or alter saturation."),
234 .priv_size = sizeof(VibranceContext),
235 .priv_class = &vibrance_class,
236 .query_formats = query_formats,
237 .inputs = vibrance_inputs,
238 .outputs = vibrance_outputs,
239 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
240 };
241