2 * Copyright (c) 2017 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/pixdesc.h"
23 #include "libavutil/opt.h"
27 #include "framesync.h"
29 typedef struct MidEqualizerContext {
31 int width[2][4], height[2][4];
39 void (*midequalizer)(const uint8_t *in0, const uint8_t *in1,
41 ptrdiff_t linesize1, ptrdiff_t linesize2,
45 float *histogram1, float *histogram2,
46 unsigned *cchange, size_t hsize);
47 } MidEqualizerContext;
49 #define OFFSET(x) offsetof(MidEqualizerContext, x)
50 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
52 static const AVOption midequalizer_options[] = {
53 { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
57 AVFILTER_DEFINE_CLASS(midequalizer);
59 static const enum AVPixelFormat pix_fmts[] = {
60 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
61 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
62 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
63 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
64 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
65 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
66 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
67 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
68 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
69 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
70 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
71 AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14,
72 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
73 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
74 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
75 AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12,
76 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
77 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
78 AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16,
83 static int process_frame(FFFrameSync *fs)
85 AVFilterContext *ctx = fs->parent;
86 MidEqualizerContext *s = fs->opaque;
87 AVFilterLink *outlink = ctx->outputs[0];
88 AVFrame *out, *in0, *in1;
91 if ((ret = ff_framesync_get_frame(&s->fs, 0, &in0, 0)) < 0 ||
92 (ret = ff_framesync_get_frame(&s->fs, 1, &in1, 0)) < 0)
95 if (ctx->is_disabled) {
96 out = av_frame_clone(in0);
98 return AVERROR(ENOMEM);
102 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
104 return AVERROR(ENOMEM);
105 av_frame_copy_props(out, in0);
107 for (p = 0; p < s->nb_planes; p++) {
108 if (!((1 << p) & s->planes)) {
109 av_image_copy_plane(out->data[p], out->linesize[p], in0->data[p], in0->linesize[p],
110 s->width[0][p] * (1 + (s->histogram_size > 256)), s->height[0][p]);
114 s->midequalizer(in0->data[p], in1->data[p],
116 in0->linesize[p], in1->linesize[p],
118 s->width[0][p], s->height[0][p],
119 s->width[1][p], s->height[1][p],
120 s->histogram[0], s->histogram[1],
121 s->cchange, s->histogram_size);
124 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
126 return ff_filter_frame(outlink, out);
129 static void compute_histogram8(const uint8_t *src, ptrdiff_t linesize,
130 int w, int h, float *histogram, size_t hsize)
134 memset(histogram, 0, hsize * sizeof(*histogram));
136 for (y = 0; y < h; y++) {
137 for (x = 0; x < w; x++) {
138 histogram[src[x]] += 1;
143 for (x = 0; x < hsize - 1; x++) {
144 histogram[x + 1] += histogram[x];
145 histogram[x] /= hsize;
147 histogram[x] /= hsize;
150 static void compute_histogram16(const uint16_t *src, ptrdiff_t linesize,
151 int w, int h, float *histogram, size_t hsize)
155 memset(histogram, 0, hsize * sizeof(*histogram));
157 for (y = 0; y < h; y++) {
158 for (x = 0; x < w; x++) {
159 histogram[src[x]] += 1;
164 for (x = 0; x < hsize - 1; x++) {
165 histogram[x + 1] += histogram[x];
166 histogram[x] /= hsize;
168 histogram[x] /= hsize;
171 static void compute_contrast_change(float *histogram1, float *histogram2,
172 unsigned *cchange, size_t hsize)
176 for (i = 0; i < hsize; i++) {
179 for (j = 0; j < hsize && histogram2[j] < histogram1[i]; j++);
181 cchange[i] = (i + j) / 2;
185 static void midequalizer8(const uint8_t *in0, const uint8_t *in1,
187 ptrdiff_t linesize1, ptrdiff_t linesize2,
191 float *histogram1, float *histogram2,
197 compute_histogram8(in0, linesize1, w0, h0, histogram1, hsize);
198 compute_histogram8(in1, linesize2, w1, h1, histogram2, hsize);
200 compute_contrast_change(histogram1, histogram2, cchange, hsize);
202 for (y = 0; y < h0; y++) {
203 for (x = 0; x < w0; x++) {
204 dst[x] = av_clip_uint8(cchange[in0[x]]);
211 static void midequalizer16(const uint8_t *in0, const uint8_t *in1,
213 ptrdiff_t linesize1, ptrdiff_t linesize2,
217 float *histogram1, float *histogram2,
221 const uint16_t *i = (const uint16_t *)in0;
222 uint16_t *d = (uint16_t *)dst;
225 compute_histogram16(i, linesize1 / 2, w0, h0, histogram1, hsize);
226 compute_histogram16((const uint16_t *)in1, linesize2 / 2, w1, h1, histogram2, hsize);
228 compute_contrast_change(histogram1, histogram2, cchange, hsize);
230 for (y = 0; y < h0; y++) {
231 for (x = 0; x < w0; x++) {
232 d[x] = cchange[i[x]];
239 static int config_input0(AVFilterLink *inlink)
241 AVFilterContext *ctx = inlink->dst;
242 MidEqualizerContext *s = ctx->priv;
243 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
246 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
248 hsub = desc->log2_chroma_w;
249 vsub = desc->log2_chroma_h;
251 s->height[0][0] = s->height[0][3] = inlink->h;
252 s->width[0][0] = s->width[0][3] = inlink->w;
253 s->height[0][1] = s->height[0][2] = AV_CEIL_RSHIFT(inlink->h, vsub);
254 s->width[0][1] = s->width[0][2] = AV_CEIL_RSHIFT(inlink->w, hsub);
256 s->histogram_size = 1 << desc->comp[0].depth;
258 s->histogram[0] = av_calloc(s->histogram_size, sizeof(float));
259 s->histogram[1] = av_calloc(s->histogram_size, sizeof(float));
260 s->cchange = av_calloc(s->histogram_size, sizeof(unsigned));
261 if (!s->histogram[0] || !s->histogram[1] || !s->cchange)
262 return AVERROR(ENOMEM);
264 if (s->histogram_size == 256) {
265 s->midequalizer = midequalizer8;
267 s->midequalizer = midequalizer16;
273 static int config_input1(AVFilterLink *inlink)
275 AVFilterContext *ctx = inlink->dst;
276 MidEqualizerContext *s = ctx->priv;
277 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
280 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
282 hsub = desc->log2_chroma_w;
283 vsub = desc->log2_chroma_h;
285 s->height[1][0] = s->height[1][3] = inlink->h;
286 s->width[1][0] = s->width[1][3] = inlink->w;
287 s->height[1][1] = s->height[1][2] = AV_CEIL_RSHIFT(inlink->h, vsub);
288 s->width[1][1] = s->width[1][2] = AV_CEIL_RSHIFT(inlink->w, hsub);
293 static int config_output(AVFilterLink *outlink)
295 AVFilterContext *ctx = outlink->src;
296 MidEqualizerContext *s = ctx->priv;
297 AVFilterLink *in0 = ctx->inputs[0];
298 AVFilterLink *in1 = ctx->inputs[1];
304 outlink->sample_aspect_ratio = in0->sample_aspect_ratio;
305 outlink->frame_rate = in0->frame_rate;
307 if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
311 in[0].time_base = in0->time_base;
312 in[1].time_base = in1->time_base;
314 in[0].before = EXT_STOP;
315 in[0].after = EXT_INFINITY;
317 in[1].before = EXT_STOP;
318 in[1].after = EXT_INFINITY;
320 s->fs.on_event = process_frame;
322 ret = ff_framesync_configure(&s->fs);
323 outlink->time_base = s->fs.time_base;
328 static int activate(AVFilterContext *ctx)
330 MidEqualizerContext *s = ctx->priv;
331 return ff_framesync_activate(&s->fs);
334 static av_cold void uninit(AVFilterContext *ctx)
336 MidEqualizerContext *s = ctx->priv;
338 ff_framesync_uninit(&s->fs);
339 av_freep(&s->histogram[0]);
340 av_freep(&s->histogram[1]);
341 av_freep(&s->cchange);
344 static const AVFilterPad midequalizer_inputs[] = {
347 .type = AVMEDIA_TYPE_VIDEO,
348 .config_props = config_input0,
352 .type = AVMEDIA_TYPE_VIDEO,
353 .config_props = config_input1,
357 static const AVFilterPad midequalizer_outputs[] = {
360 .type = AVMEDIA_TYPE_VIDEO,
361 .config_props = config_output,
365 const AVFilter ff_vf_midequalizer = {
366 .name = "midequalizer",
367 .description = NULL_IF_CONFIG_SMALL("Apply Midway Equalization."),
368 .priv_size = sizeof(MidEqualizerContext),
370 .activate = activate,
371 FILTER_INPUTS(midequalizer_inputs),
372 FILTER_OUTPUTS(midequalizer_outputs),
373 FILTER_PIXFMTS_ARRAY(pix_fmts),
374 .priv_class = &midequalizer_class,
375 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,