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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 "avfilter.h" | |
26 | #include "formats.h" | |
27 | #include "internal.h" | |
28 | #include "video.h" | |
29 | ||
30 | enum HistogramMode { | |
31 | MODE_LEVELS, | |
32 | MODE_WAVEFORM, | |
33 | MODE_COLOR, | |
34 | MODE_COLOR2, | |
35 | MODE_NB | |
36 | }; | |
37 | ||
38 | typedef struct HistogramContext { | |
39 | const AVClass *class; ///< AVClass context for log and options purpose | |
40 | enum HistogramMode mode; | |
41 | unsigned histogram[256]; | |
42 | int ncomp; | |
43 | const uint8_t *bg_color; | |
44 | const uint8_t *fg_color; | |
45 | int level_height; | |
46 | int scale_height; | |
47 | int step; | |
48 | int waveform_mode; | |
49 | int waveform_mirror; | |
50 | int display_mode; | |
51 | int levels_mode; | |
52 | const AVPixFmtDescriptor *desc; | |
53 | } HistogramContext; | |
54 | ||
55 | #define OFFSET(x) offsetof(HistogramContext, x) | |
56 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM | |
57 | ||
58 | static const AVOption histogram_options[] = { | |
59 | { "mode", "set histogram mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_LEVELS}, 0, MODE_NB-1, FLAGS, "mode"}, | |
60 | { "levels", "standard histogram", 0, AV_OPT_TYPE_CONST, {.i64=MODE_LEVELS}, 0, 0, FLAGS, "mode" }, | |
61 | { "waveform", "per row/column luminance graph", 0, AV_OPT_TYPE_CONST, {.i64=MODE_WAVEFORM}, 0, 0, FLAGS, "mode" }, | |
62 | { "color", "chroma values in vectorscope", 0, AV_OPT_TYPE_CONST, {.i64=MODE_COLOR}, 0, 0, FLAGS, "mode" }, | |
63 | { "color2", "chroma values in vectorscope", 0, AV_OPT_TYPE_CONST, {.i64=MODE_COLOR2}, 0, 0, FLAGS, "mode" }, | |
64 | { "level_height", "set level height", OFFSET(level_height), AV_OPT_TYPE_INT, {.i64=200}, 50, 2048, FLAGS}, | |
65 | { "scale_height", "set scale height", OFFSET(scale_height), AV_OPT_TYPE_INT, {.i64=12}, 0, 40, FLAGS}, | |
66 | { "step", "set waveform step value", OFFSET(step), AV_OPT_TYPE_INT, {.i64=10}, 1, 255, FLAGS}, | |
67 | { "waveform_mode", "set waveform mode", OFFSET(waveform_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "waveform_mode"}, | |
68 | { "row", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "waveform_mode" }, | |
69 | { "column", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "waveform_mode" }, | |
70 | { "waveform_mirror", "set waveform mirroring", OFFSET(waveform_mirror), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "waveform_mirror"}, | |
71 | { "display_mode", "set display mode", OFFSET(display_mode), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "display_mode"}, | |
72 | { "parade", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "display_mode" }, | |
73 | { "overlay", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "display_mode" }, | |
74 | { "levels_mode", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "levels_mode"}, | |
75 | { "linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "levels_mode" }, | |
76 | { "logarithmic", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "levels_mode" }, | |
77 | { NULL } | |
78 | }; | |
79 | ||
80 | AVFILTER_DEFINE_CLASS(histogram); | |
81 | ||
82 | static const enum AVPixelFormat color_pix_fmts[] = { | |
83 | AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVJ444P, | |
84 | AV_PIX_FMT_NONE | |
85 | }; | |
86 | ||
87 | static const enum AVPixelFormat levels_pix_fmts[] = { | |
88 | AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVJ444P, | |
89 | AV_PIX_FMT_GRAY8, AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE | |
90 | }; | |
91 | ||
92 | static const enum AVPixelFormat waveform_pix_fmts[] = { | |
93 | AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, | |
94 | AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, | |
95 | AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, | |
96 | AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, | |
97 | AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, | |
98 | AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, | |
99 | AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P, | |
100 | AV_PIX_FMT_GRAY8, | |
101 | AV_PIX_FMT_NONE | |
102 | }; | |
103 | ||
104 | static int query_formats(AVFilterContext *ctx) | |
105 | { | |
106 | HistogramContext *h = ctx->priv; | |
107 | const enum AVPixelFormat *pix_fmts; | |
108 | ||
109 | switch (h->mode) { | |
110 | case MODE_WAVEFORM: | |
111 | pix_fmts = waveform_pix_fmts; | |
112 | break; | |
113 | case MODE_LEVELS: | |
114 | pix_fmts = levels_pix_fmts; | |
115 | break; | |
116 | case MODE_COLOR: | |
117 | case MODE_COLOR2: | |
118 | pix_fmts = color_pix_fmts; | |
119 | break; | |
120 | default: | |
121 | av_assert0(0); | |
122 | } | |
123 | ||
124 | ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
129 | static const uint8_t black_yuva_color[4] = { 0, 127, 127, 255 }; | |
130 | static const uint8_t black_gbrp_color[4] = { 0, 0, 0, 255 }; | |
131 | static const uint8_t white_yuva_color[4] = { 255, 127, 127, 255 }; | |
132 | static const uint8_t white_gbrp_color[4] = { 255, 255, 255, 255 }; | |
133 | ||
134 | static int config_input(AVFilterLink *inlink) | |
135 | { | |
136 | HistogramContext *h = inlink->dst->priv; | |
137 | ||
138 | h->desc = av_pix_fmt_desc_get(inlink->format); | |
139 | h->ncomp = h->desc->nb_components; | |
140 | ||
141 | switch (inlink->format) { | |
142 | case AV_PIX_FMT_GBRAP: | |
143 | case AV_PIX_FMT_GBRP: | |
144 | h->bg_color = black_gbrp_color; | |
145 | h->fg_color = white_gbrp_color; | |
146 | break; | |
147 | default: | |
148 | h->bg_color = black_yuva_color; | |
149 | h->fg_color = white_yuva_color; | |
150 | } | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | static int config_output(AVFilterLink *outlink) | |
156 | { | |
157 | AVFilterContext *ctx = outlink->src; | |
158 | HistogramContext *h = ctx->priv; | |
159 | ||
160 | switch (h->mode) { | |
161 | case MODE_LEVELS: | |
162 | outlink->w = 256; | |
163 | outlink->h = (h->level_height + h->scale_height) * FFMAX(h->ncomp * h->display_mode, 1); | |
164 | break; | |
165 | case MODE_WAVEFORM: | |
166 | if (h->waveform_mode) | |
167 | outlink->h = 256 * FFMAX(h->ncomp * h->display_mode, 1); | |
168 | else | |
169 | outlink->w = 256 * FFMAX(h->ncomp * h->display_mode, 1); | |
170 | break; | |
171 | case MODE_COLOR: | |
172 | case MODE_COLOR2: | |
173 | outlink->h = outlink->w = 256; | |
174 | break; | |
175 | default: | |
176 | av_assert0(0); | |
177 | } | |
178 | ||
179 | outlink->sample_aspect_ratio = (AVRational){1,1}; | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | static void gen_waveform(HistogramContext *h, AVFrame *inpicref, AVFrame *outpicref, | |
185 | int component, int intensity, int offset, int col_mode) | |
186 | { | |
187 | const int plane = h->desc->comp[component].plane; | |
188 | const int mirror = h->waveform_mirror; | |
189 | const int is_chroma = (component == 1 || component == 2); | |
190 | const int shift_w = (is_chroma ? h->desc->log2_chroma_w : 0); | |
191 | const int shift_h = (is_chroma ? h->desc->log2_chroma_h : 0); | |
192 | const int src_linesize = inpicref->linesize[plane]; | |
193 | const int dst_linesize = outpicref->linesize[plane]; | |
194 | const int dst_signed_linesize = dst_linesize * (mirror == 1 ? -1 : 1); | |
195 | uint8_t *src_data = inpicref->data[plane]; | |
196 | uint8_t *dst_data = outpicref->data[plane] + (col_mode ? (offset >> shift_h) * dst_linesize : offset >> shift_w); | |
197 | uint8_t * const dst_bottom_line = dst_data + dst_linesize * ((256 >> shift_h) - 1); | |
198 | uint8_t * const dst_line = (mirror ? dst_bottom_line : dst_data); | |
199 | const uint8_t max = 255 - intensity; | |
200 | const int src_h = FF_CEIL_RSHIFT(inpicref->height, shift_h); | |
201 | const int src_w = FF_CEIL_RSHIFT(inpicref->width, shift_w); | |
202 | uint8_t *dst, *p; | |
203 | int y; | |
204 | ||
205 | if (!col_mode && mirror) | |
206 | dst_data += 256 >> shift_w; | |
207 | for (y = 0; y < src_h; y++) { | |
208 | const uint8_t *src_data_end = src_data + src_w; | |
209 | dst = dst_line; | |
210 | for (p = src_data; p < src_data_end; p++) { | |
211 | uint8_t *target; | |
212 | if (col_mode) { | |
213 | target = dst++ + dst_signed_linesize * (*p >> shift_h); | |
214 | } else { | |
215 | if (mirror) | |
216 | target = dst_data - (*p >> shift_w); | |
217 | else | |
218 | target = dst_data + (*p >> shift_w); | |
219 | } | |
220 | if (*target <= max) | |
221 | *target += intensity; | |
222 | else | |
223 | *target = 255; | |
224 | } | |
225 | src_data += src_linesize; | |
226 | dst_data += dst_linesize; | |
227 | } | |
228 | } | |
229 | ||
230 | ||
231 | static int filter_frame(AVFilterLink *inlink, AVFrame *in) | |
232 | { | |
233 | HistogramContext *h = inlink->dst->priv; | |
234 | AVFilterContext *ctx = inlink->dst; | |
235 | AVFilterLink *outlink = ctx->outputs[0]; | |
236 | AVFrame *out; | |
237 | const uint8_t *src; | |
238 | uint8_t *dst; | |
239 | int i, j, k, l; | |
240 | ||
241 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); | |
242 | if (!out) { | |
243 | av_frame_free(&in); | |
244 | return AVERROR(ENOMEM); | |
245 | } | |
246 | ||
247 | out->pts = in->pts; | |
248 | ||
249 | for (k = 0; k < h->ncomp; k++) { | |
250 | const int is_chroma = (k == 1 || k == 2); | |
251 | const int dst_h = FF_CEIL_RSHIFT(outlink->h, (is_chroma ? h->desc->log2_chroma_h : 0)); | |
252 | const int dst_w = FF_CEIL_RSHIFT(outlink->w, (is_chroma ? h->desc->log2_chroma_w : 0)); | |
253 | for (i = 0; i < dst_h ; i++) | |
254 | memset(out->data[h->desc->comp[k].plane] + | |
255 | i * out->linesize[h->desc->comp[k].plane], | |
256 | h->bg_color[k], dst_w); | |
257 | } | |
258 | ||
259 | switch (h->mode) { | |
260 | case MODE_LEVELS: | |
261 | for (k = 0; k < h->ncomp; k++) { | |
262 | const int p = h->desc->comp[k].plane; | |
263 | const int start = k * (h->level_height + h->scale_height) * h->display_mode; | |
264 | double max_hval_log; | |
265 | unsigned max_hval = 0; | |
266 | ||
267 | for (i = 0; i < in->height; i++) { | |
268 | src = in->data[p] + i * in->linesize[p]; | |
269 | for (j = 0; j < in->width; j++) | |
270 | h->histogram[src[j]]++; | |
271 | } | |
272 | ||
273 | for (i = 0; i < 256; i++) | |
274 | max_hval = FFMAX(max_hval, h->histogram[i]); | |
275 | max_hval_log = log2(max_hval + 1); | |
276 | ||
277 | for (i = 0; i < outlink->w; i++) { | |
278 | int col_height; | |
279 | ||
280 | if (h->levels_mode) | |
281 | col_height = round(h->level_height * (1. - (log2(h->histogram[i] + 1) / max_hval_log))); | |
282 | else | |
283 | col_height = h->level_height - (h->histogram[i] * (int64_t)h->level_height + max_hval - 1) / max_hval; | |
284 | ||
285 | for (j = h->level_height - 1; j >= col_height; j--) { | |
286 | if (h->display_mode) { | |
287 | for (l = 0; l < h->ncomp; l++) | |
288 | out->data[l][(j + start) * out->linesize[l] + i] = h->fg_color[l]; | |
289 | } else { | |
290 | out->data[p][(j + start) * out->linesize[p] + i] = 255; | |
291 | } | |
292 | } | |
293 | for (j = h->level_height + h->scale_height - 1; j >= h->level_height; j--) | |
294 | out->data[p][(j + start) * out->linesize[p] + i] = i; | |
295 | } | |
296 | ||
297 | memset(h->histogram, 0, 256 * sizeof(unsigned)); | |
298 | } | |
299 | break; | |
300 | case MODE_WAVEFORM: | |
301 | for (k = 0; k < h->ncomp; k++) { | |
302 | const int offset = k * 256 * h->display_mode; | |
303 | gen_waveform(h, in, out, k, h->step, offset, h->waveform_mode); | |
304 | } | |
305 | break; | |
306 | case MODE_COLOR: | |
307 | for (i = 0; i < inlink->h; i++) { | |
308 | const int iw1 = i * in->linesize[1]; | |
309 | const int iw2 = i * in->linesize[2]; | |
310 | for (j = 0; j < inlink->w; j++) { | |
311 | const int pos = in->data[1][iw1 + j] * out->linesize[0] + in->data[2][iw2 + j]; | |
312 | if (out->data[0][pos] < 255) | |
313 | out->data[0][pos]++; | |
314 | } | |
315 | } | |
316 | for (i = 0; i < 256; i++) { | |
317 | dst = out->data[0] + i * out->linesize[0]; | |
318 | for (j = 0; j < 256; j++) { | |
319 | if (!dst[j]) { | |
320 | out->data[1][i * out->linesize[0] + j] = i; | |
321 | out->data[2][i * out->linesize[0] + j] = j; | |
322 | } | |
323 | } | |
324 | } | |
325 | break; | |
326 | case MODE_COLOR2: | |
327 | for (i = 0; i < inlink->h; i++) { | |
328 | const int iw1 = i * in->linesize[1]; | |
329 | const int iw2 = i * in->linesize[2]; | |
330 | for (j = 0; j < inlink->w; j++) { | |
331 | const int u = in->data[1][iw1 + j]; | |
332 | const int v = in->data[2][iw2 + j]; | |
333 | const int pos = u * out->linesize[0] + v; | |
334 | if (!out->data[0][pos]) | |
335 | out->data[0][pos] = FFABS(128 - u) + FFABS(128 - v); | |
336 | out->data[1][pos] = u; | |
337 | out->data[2][pos] = v; | |
338 | } | |
339 | } | |
340 | break; | |
341 | default: | |
342 | av_assert0(0); | |
343 | } | |
344 | ||
345 | av_frame_free(&in); | |
346 | return ff_filter_frame(outlink, out); | |
347 | } | |
348 | ||
349 | static const AVFilterPad inputs[] = { | |
350 | { | |
351 | .name = "default", | |
352 | .type = AVMEDIA_TYPE_VIDEO, | |
353 | .filter_frame = filter_frame, | |
354 | .config_props = config_input, | |
355 | }, | |
356 | { NULL } | |
357 | }; | |
358 | ||
359 | static const AVFilterPad outputs[] = { | |
360 | { | |
361 | .name = "default", | |
362 | .type = AVMEDIA_TYPE_VIDEO, | |
363 | .config_props = config_output, | |
364 | }, | |
365 | { NULL } | |
366 | }; | |
367 | ||
368 | AVFilter ff_vf_histogram = { | |
369 | .name = "histogram", | |
370 | .description = NULL_IF_CONFIG_SMALL("Compute and draw a histogram."), | |
371 | .priv_size = sizeof(HistogramContext), | |
372 | .query_formats = query_formats, | |
373 | .inputs = inputs, | |
374 | .outputs = outputs, | |
375 | .priv_class = &histogram_class, | |
376 | }; |