summaryrefslogtreecommitdiff
path: root/libavfilter/vf_histogram.c (plain)
blob: f04f5dea104f7b375504e52de68220cd132c98a4
1/*
2 * Copyright (c) 2012-2013 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/avassert.h"
22#include "libavutil/opt.h"
23#include "libavutil/parseutils.h"
24#include "libavutil/pixdesc.h"
25#include "libavutil/imgutils.h"
26#include "libavutil/intreadwrite.h"
27#include "avfilter.h"
28#include "formats.h"
29#include "internal.h"
30#include "video.h"
31
32typedef struct HistogramContext {
33 const AVClass *class; ///< AVClass context for log and options purpose
34 unsigned histogram[256*256];
35 int histogram_size;
36 int mult;
37 int ncomp;
38 int dncomp;
39 uint8_t bg_color[4];
40 uint8_t fg_color[4];
41 int level_height;
42 int scale_height;
43 int display_mode;
44 int levels_mode;
45 const AVPixFmtDescriptor *desc, *odesc;
46 int components;
47 float fgopacity;
48 float bgopacity;
49 int planewidth[4];
50 int planeheight[4];
51} HistogramContext;
52
53#define OFFSET(x) offsetof(HistogramContext, x)
54#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
55
56static const AVOption histogram_options[] = {
57 { "level_height", "set level height", OFFSET(level_height), AV_OPT_TYPE_INT, {.i64=200}, 50, 2048, FLAGS},
58 { "scale_height", "set scale height", OFFSET(scale_height), AV_OPT_TYPE_INT, {.i64=12}, 0, 40, FLAGS},
59 { "display_mode", "set display mode", OFFSET(display_mode), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "display_mode"},
60 { "d", "set display mode", OFFSET(display_mode), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "display_mode"},
61 { "parade", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "display_mode" },
62 { "overlay", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "display_mode" },
63 { "levels_mode", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "levels_mode"},
64 { "m", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "levels_mode"},
65 { "linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "levels_mode" },
66 { "logarithmic", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "levels_mode" },
67 { "components", "set color components to display", OFFSET(components), AV_OPT_TYPE_INT, {.i64=7}, 1, 15, FLAGS},
68 { "c", "set color components to display", OFFSET(components), AV_OPT_TYPE_INT, {.i64=7}, 1, 15, FLAGS},
69 { "fgopacity", "set foreground opacity", OFFSET(fgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.7}, 0, 1, FLAGS},
70 { "f", "set foreground opacity", OFFSET(fgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.7}, 0, 1, FLAGS},
71 { "bgopacity", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS},
72 { "b", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS},
73 { NULL }
74};
75
76AVFILTER_DEFINE_CLASS(histogram);
77
78static const enum AVPixelFormat levels_in_pix_fmts[] = {
79 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
80 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
81 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVJ411P,
82 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV410P,
83 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
84 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
85 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
86 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
87 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
88 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
89 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRP,
90 AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
91 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
92 AV_PIX_FMT_GRAY8,
93 AV_PIX_FMT_NONE
94};
95
96static const enum AVPixelFormat levels_out_yuv8_pix_fmts[] = {
97 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P,
98 AV_PIX_FMT_NONE
99};
100
101static const enum AVPixelFormat levels_out_yuv9_pix_fmts[] = {
102 AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUV444P9,
103 AV_PIX_FMT_NONE
104};
105
106static const enum AVPixelFormat levels_out_yuv10_pix_fmts[] = {
107 AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUV444P10,
108 AV_PIX_FMT_NONE
109};
110
111static const enum AVPixelFormat levels_out_yuv12_pix_fmts[] = {
112 AV_PIX_FMT_YUV444P12,
113 AV_PIX_FMT_NONE
114};
115
116static const enum AVPixelFormat levels_out_rgb8_pix_fmts[] = {
117 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRP,
118 AV_PIX_FMT_NONE
119};
120
121static const enum AVPixelFormat levels_out_rgb9_pix_fmts[] = {
122 AV_PIX_FMT_GBRP9,
123 AV_PIX_FMT_NONE
124};
125
126static const enum AVPixelFormat levels_out_rgb10_pix_fmts[] = {
127 AV_PIX_FMT_GBRP10,
128 AV_PIX_FMT_NONE
129};
130
131static const enum AVPixelFormat levels_out_rgb12_pix_fmts[] = {
132 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
133 AV_PIX_FMT_NONE
134};
135
136static int query_formats(AVFilterContext *ctx)
137{
138 AVFilterFormats *avff;
139 const AVPixFmtDescriptor *desc;
140 const enum AVPixelFormat *out_pix_fmts;
141 int rgb, i, bits;
142 int ret;
143
144 if (!ctx->inputs[0]->in_formats ||
145 !ctx->inputs[0]->in_formats->nb_formats) {
146 return AVERROR(EAGAIN);
147 }
148
149 if (!ctx->inputs[0]->out_formats)
150 if ((ret = ff_formats_ref(ff_make_format_list(levels_in_pix_fmts), &ctx->inputs[0]->out_formats)) < 0)
151 return ret;
152 avff = ctx->inputs[0]->in_formats;
153 desc = av_pix_fmt_desc_get(avff->formats[0]);
154 rgb = desc->flags & AV_PIX_FMT_FLAG_RGB;
155 bits = desc->comp[0].depth;
156 for (i = 1; i < avff->nb_formats; i++) {
157 desc = av_pix_fmt_desc_get(avff->formats[i]);
158 if ((rgb != (desc->flags & AV_PIX_FMT_FLAG_RGB)) ||
159 (bits != desc->comp[0].depth))
160 return AVERROR(EAGAIN);
161 }
162
163 if (rgb && bits == 8)
164 out_pix_fmts = levels_out_rgb8_pix_fmts;
165 else if (rgb && bits == 9)
166 out_pix_fmts = levels_out_rgb9_pix_fmts;
167 else if (rgb && bits == 10)
168 out_pix_fmts = levels_out_rgb10_pix_fmts;
169 else if (rgb && bits == 12)
170 out_pix_fmts = levels_out_rgb12_pix_fmts;
171 else if (bits == 8)
172 out_pix_fmts = levels_out_yuv8_pix_fmts;
173 else if (bits == 9)
174 out_pix_fmts = levels_out_yuv9_pix_fmts;
175 else if (bits == 10)
176 out_pix_fmts = levels_out_yuv10_pix_fmts;
177 else if (bits == 12)
178 out_pix_fmts = levels_out_yuv12_pix_fmts;
179 else
180 return AVERROR(EAGAIN);
181 if ((ret = ff_formats_ref(ff_make_format_list(out_pix_fmts), &ctx->outputs[0]->in_formats)) < 0)
182 return ret;
183
184 return 0;
185}
186
187static const uint8_t black_yuva_color[4] = { 0, 127, 127, 255 };
188static const uint8_t black_gbrp_color[4] = { 0, 0, 0, 255 };
189static const uint8_t white_yuva_color[4] = { 255, 127, 127, 255 };
190static const uint8_t white_gbrp_color[4] = { 255, 255, 255, 255 };
191
192static int config_input(AVFilterLink *inlink)
193{
194 HistogramContext *h = inlink->dst->priv;
195
196 h->desc = av_pix_fmt_desc_get(inlink->format);
197 h->ncomp = h->desc->nb_components;
198 h->histogram_size = 1 << h->desc->comp[0].depth;
199 h->mult = h->histogram_size / 256;
200
201 switch (inlink->format) {
202 case AV_PIX_FMT_GBRP12:
203 case AV_PIX_FMT_GBRP10:
204 case AV_PIX_FMT_GBRP9:
205 case AV_PIX_FMT_GBRAP:
206 case AV_PIX_FMT_GBRP:
207 memcpy(h->bg_color, black_gbrp_color, 4);
208 memcpy(h->fg_color, white_gbrp_color, 4);
209 break;
210 default:
211 memcpy(h->bg_color, black_yuva_color, 4);
212 memcpy(h->fg_color, white_yuva_color, 4);
213 }
214
215 h->fg_color[3] = h->fgopacity * 255;
216 h->bg_color[3] = h->bgopacity * 255;
217
218 h->planeheight[1] = h->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, h->desc->log2_chroma_h);
219 h->planeheight[0] = h->planeheight[3] = inlink->h;
220 h->planewidth[1] = h->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, h->desc->log2_chroma_w);
221 h->planewidth[0] = h->planewidth[3] = inlink->w;
222
223 return 0;
224}
225
226static int config_output(AVFilterLink *outlink)
227{
228 AVFilterContext *ctx = outlink->src;
229 HistogramContext *h = ctx->priv;
230 int ncomp = 0, i;
231
232 for (i = 0; i < h->ncomp; i++) {
233 if ((1 << i) & h->components)
234 ncomp++;
235 }
236 outlink->w = h->histogram_size;
237 outlink->h = (h->level_height + h->scale_height) * FFMAX(ncomp * h->display_mode, 1);
238
239 h->odesc = av_pix_fmt_desc_get(outlink->format);
240 h->dncomp = h->odesc->nb_components;
241 outlink->sample_aspect_ratio = (AVRational){1,1};
242
243 return 0;
244}
245
246static int filter_frame(AVFilterLink *inlink, AVFrame *in)
247{
248 HistogramContext *h = inlink->dst->priv;
249 AVFilterContext *ctx = inlink->dst;
250 AVFilterLink *outlink = ctx->outputs[0];
251 AVFrame *out;
252 int i, j, k, l, m;
253
254 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
255 if (!out) {
256 av_frame_free(&in);
257 return AVERROR(ENOMEM);
258 }
259
260 out->pts = in->pts;
261
262 for (k = 0; k < 4 && out->data[k]; k++) {
263 const int is_chroma = (k == 1 || k == 2);
264 const int dst_h = AV_CEIL_RSHIFT(outlink->h, (is_chroma ? h->odesc->log2_chroma_h : 0));
265 const int dst_w = AV_CEIL_RSHIFT(outlink->w, (is_chroma ? h->odesc->log2_chroma_w : 0));
266
267 if (h->histogram_size <= 256) {
268 for (i = 0; i < dst_h ; i++)
269 memset(out->data[h->odesc->comp[k].plane] +
270 i * out->linesize[h->odesc->comp[k].plane],
271 h->bg_color[k], dst_w);
272 } else {
273 const int mult = h->mult;
274
275 for (i = 0; i < dst_h ; i++)
276 for (j = 0; j < dst_w; j++)
277 AV_WN16(out->data[h->odesc->comp[k].plane] +
278 i * out->linesize[h->odesc->comp[k].plane] + j * 2,
279 h->bg_color[k] * mult);
280 }
281 }
282
283 for (m = 0, k = 0; k < h->ncomp; k++) {
284 const int p = h->desc->comp[k].plane;
285 const int height = h->planeheight[p];
286 const int width = h->planewidth[p];
287 double max_hval_log;
288 unsigned max_hval = 0;
289 int start;
290
291 if (!((1 << k) & h->components))
292 continue;
293 start = m++ * (h->level_height + h->scale_height) * h->display_mode;
294
295 if (h->histogram_size <= 256) {
296 for (i = 0; i < height; i++) {
297 const uint8_t *src = in->data[p] + i * in->linesize[p];
298 for (j = 0; j < width; j++)
299 h->histogram[src[j]]++;
300 }
301 } else {
302 for (i = 0; i < height; i++) {
303 const uint16_t *src = (const uint16_t *)(in->data[p] + i * in->linesize[p]);
304 for (j = 0; j < width; j++)
305 h->histogram[src[j]]++;
306 }
307 }
308
309 for (i = 0; i < h->histogram_size; i++)
310 max_hval = FFMAX(max_hval, h->histogram[i]);
311 max_hval_log = log2(max_hval + 1);
312
313 for (i = 0; i < outlink->w; i++) {
314 int col_height;
315
316 if (h->levels_mode)
317 col_height = lrint(h->level_height * (1. - (log2(h->histogram[i] + 1) / max_hval_log)));
318 else
319 col_height = h->level_height - (h->histogram[i] * (int64_t)h->level_height + max_hval - 1) / max_hval;
320
321 if (h->histogram_size <= 256) {
322 for (j = h->level_height - 1; j >= col_height; j--) {
323 if (h->display_mode) {
324 for (l = 0; l < h->dncomp; l++)
325 out->data[l][(j + start) * out->linesize[l] + i] = h->fg_color[l];
326 } else {
327 out->data[p][(j + start) * out->linesize[p] + i] = 255;
328 }
329 }
330 for (j = h->level_height + h->scale_height - 1; j >= h->level_height; j--)
331 out->data[p][(j + start) * out->linesize[p] + i] = i;
332 } else {
333 const int mult = h->mult;
334
335 for (j = h->level_height - 1; j >= col_height; j--) {
336 if (h->display_mode) {
337 for (l = 0; l < h->dncomp; l++)
338 AV_WN16(out->data[l] + (j + start) * out->linesize[l] + i * 2, h->fg_color[l] * mult);
339 } else {
340 AV_WN16(out->data[p] + (j + start) * out->linesize[p] + i * 2, 255 * mult);
341 }
342 }
343 for (j = h->level_height + h->scale_height - 1; j >= h->level_height; j--)
344 AV_WN16(out->data[p] + (j + start) * out->linesize[p] + i * 2, i);
345 }
346 }
347
348 memset(h->histogram, 0, h->histogram_size * sizeof(unsigned));
349 }
350
351 av_frame_free(&in);
352 return ff_filter_frame(outlink, out);
353}
354
355static const AVFilterPad inputs[] = {
356 {
357 .name = "default",
358 .type = AVMEDIA_TYPE_VIDEO,
359 .filter_frame = filter_frame,
360 .config_props = config_input,
361 },
362 { NULL }
363};
364
365static const AVFilterPad outputs[] = {
366 {
367 .name = "default",
368 .type = AVMEDIA_TYPE_VIDEO,
369 .config_props = config_output,
370 },
371 { NULL }
372};
373
374AVFilter ff_vf_histogram = {
375 .name = "histogram",
376 .description = NULL_IF_CONFIG_SMALL("Compute and draw a histogram."),
377 .priv_size = sizeof(HistogramContext),
378 .query_formats = query_formats,
379 .inputs = inputs,
380 .outputs = outputs,
381 .priv_class = &histogram_class,
382};
383
generated by cgit at 2024-05-17 20:21:56 (GMT)