1 /*
2 * Copyright (c) 2015 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 "avfilter.h"
25 #include "filters.h"
26 #include "formats.h"
27 #include "audio.h"
28 #include "video.h"
29 #include "internal.h"
30
31 enum DisplayScale { LINEAR, SQRT, CBRT, LOG, RLOG, NB_SCALES };
32 enum AmplitudeScale { ALINEAR, ALOG, NB_ASCALES };
33 enum SlideMode { REPLACE, SCROLL, NB_SLIDES };
34 enum DisplayMode { SINGLE, SEPARATE, NB_DMODES };
35 enum HistogramMode { ACCUMULATE, CURRENT, NB_HMODES };
36
37 typedef struct AudioHistogramContext {
38 const AVClass *class;
39 AVFrame *out;
40 int w, h;
41 AVRational frame_rate;
42 uint64_t *achistogram;
43 uint64_t *shistogram;
44 int ascale;
45 int scale;
46 float phisto;
47 int histogram_h;
48 int apos;
49 int ypos;
50 int slide;
51 int dmode;
52 int dchannels;
53 int count;
54 int frame_count;
55 float *combine_buffer;
56 AVFrame *in[101];
57 int first;
58 int nb_samples;
59 } AudioHistogramContext;
60
61 #define OFFSET(x) offsetof(AudioHistogramContext, x)
62 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
63
64 static const AVOption ahistogram_options[] = {
65 { "dmode", "set method to display channels", OFFSET(dmode), AV_OPT_TYPE_INT, {.i64=SINGLE}, 0, NB_DMODES-1, FLAGS, "dmode" },
66 { "single", "all channels use single histogram", 0, AV_OPT_TYPE_CONST, {.i64=SINGLE}, 0, 0, FLAGS, "dmode" },
67 { "separate", "each channel have own histogram", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "dmode" },
68 { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
69 { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
70 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS },
71 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS },
72 { "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, LINEAR, NB_SCALES-1, FLAGS, "scale" },
73 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
74 { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
75 { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
76 { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
77 { "rlog", "reverse logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=RLOG}, 0, 0, FLAGS, "scale" },
78 { "ascale", "set amplitude scale", OFFSET(ascale), AV_OPT_TYPE_INT, {.i64=ALOG}, LINEAR, NB_ASCALES-1, FLAGS, "ascale" },
79 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=ALOG}, 0, 0, FLAGS, "ascale" },
80 { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=ALINEAR}, 0, 0, FLAGS, "ascale" },
81 { "acount", "how much frames to accumulate", OFFSET(count), AV_OPT_TYPE_INT, {.i64=1}, -1, 100, FLAGS },
82 { "rheight", "set histogram ratio of window height", OFFSET(phisto), AV_OPT_TYPE_FLOAT, {.dbl=0.10}, 0, 1, FLAGS },
83 { "slide", "set sonogram sliding", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=REPLACE}, 0, NB_SLIDES-1, FLAGS, "slide" },
84 { "replace", "replace old rows with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE}, 0, 0, FLAGS, "slide" },
85 { "scroll", "scroll from top to bottom", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, "slide" },
86 { NULL }
87 };
88
89 AVFILTER_DEFINE_CLASS(ahistogram);
90
query_formats(AVFilterContext * ctx)91 static int query_formats(AVFilterContext *ctx)
92 {
93 AVFilterFormats *formats = NULL;
94 AVFilterChannelLayouts *layouts = NULL;
95 AVFilterLink *inlink = ctx->inputs[0];
96 AVFilterLink *outlink = ctx->outputs[0];
97 static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
98 static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE };
99 int ret = AVERROR(EINVAL);
100
101 formats = ff_make_format_list(sample_fmts);
102 if ((ret = ff_formats_ref (formats, &inlink->outcfg.formats )) < 0 ||
103 (layouts = ff_all_channel_counts()) == NULL ||
104 (ret = ff_channel_layouts_ref (layouts, &inlink->outcfg.channel_layouts)) < 0)
105 return ret;
106
107 formats = ff_all_samplerates();
108 if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
109 return ret;
110
111 formats = ff_make_format_list(pix_fmts);
112 if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
113 return ret;
114
115 return 0;
116 }
117
config_input(AVFilterLink * inlink)118 static int config_input(AVFilterLink *inlink)
119 {
120 AVFilterContext *ctx = inlink->dst;
121 AudioHistogramContext *s = ctx->priv;
122
123 s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
124 s->dchannels = s->dmode == SINGLE ? 1 : inlink->channels;
125 s->shistogram = av_calloc(s->w, s->dchannels * sizeof(*s->shistogram));
126 if (!s->shistogram)
127 return AVERROR(ENOMEM);
128
129 s->achistogram = av_calloc(s->w, s->dchannels * sizeof(*s->achistogram));
130 if (!s->achistogram)
131 return AVERROR(ENOMEM);
132
133 return 0;
134 }
135
config_output(AVFilterLink * outlink)136 static int config_output(AVFilterLink *outlink)
137 {
138 AudioHistogramContext *s = outlink->src->priv;
139
140 outlink->w = s->w;
141 outlink->h = s->h;
142 outlink->sample_aspect_ratio = (AVRational){1,1};
143 outlink->frame_rate = s->frame_rate;
144
145 s->histogram_h = s->h * s->phisto;
146 s->ypos = s->h * s->phisto;
147
148 if (s->dmode == SEPARATE) {
149 s->combine_buffer = av_malloc_array(outlink->w * 3, sizeof(*s->combine_buffer));
150 if (!s->combine_buffer)
151 return AVERROR(ENOMEM);
152 }
153
154 return 0;
155 }
156
filter_frame(AVFilterLink * inlink,AVFrame * in)157 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
158 {
159 AVFilterContext *ctx = inlink->dst;
160 AVFilterLink *outlink = ctx->outputs[0];
161 AudioHistogramContext *s = ctx->priv;
162 const int H = s->histogram_h;
163 const int w = s->w;
164 int c, y, n, p, bin;
165 uint64_t acmax = 1;
166 AVFrame *clone;
167
168 if (!s->out || s->out->width != outlink->w ||
169 s->out->height != outlink->h) {
170 av_frame_free(&s->out);
171 s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
172 if (!s->out) {
173 av_frame_free(&in);
174 return AVERROR(ENOMEM);
175 }
176 for (n = H; n < s->h; n++) {
177 memset(s->out->data[0] + n * s->out->linesize[0], 0, w);
178 memset(s->out->data[1] + n * s->out->linesize[0], 127, w);
179 memset(s->out->data[2] + n * s->out->linesize[0], 127, w);
180 memset(s->out->data[3] + n * s->out->linesize[0], 0, w);
181 }
182 }
183
184 if (s->dmode == SEPARATE) {
185 for (y = 0; y < w; y++) {
186 s->combine_buffer[3 * y ] = 0;
187 s->combine_buffer[3 * y + 1] = 127.5;
188 s->combine_buffer[3 * y + 2] = 127.5;
189 }
190 }
191
192 for (n = 0; n < H; n++) {
193 memset(s->out->data[0] + n * s->out->linesize[0], 0, w);
194 memset(s->out->data[1] + n * s->out->linesize[0], 127, w);
195 memset(s->out->data[2] + n * s->out->linesize[0], 127, w);
196 memset(s->out->data[3] + n * s->out->linesize[0], 0, w);
197 }
198 s->out->pts = in->pts;
199
200 s->first = s->frame_count;
201
202 switch (s->ascale) {
203 case ALINEAR:
204 for (c = 0; c < inlink->channels; c++) {
205 const float *src = (const float *)in->extended_data[c];
206 uint64_t *achistogram = &s->achistogram[(s->dmode == SINGLE ? 0: c) * w];
207
208 for (n = 0; n < in->nb_samples; n++) {
209 bin = lrint(av_clipf(fabsf(src[n]), 0, 1) * (w - 1));
210
211 achistogram[bin]++;
212 }
213
214 if (s->in[s->first] && s->count >= 0) {
215 uint64_t *shistogram = &s->shistogram[(s->dmode == SINGLE ? 0: c) * w];
216 const float *src2 = (const float *)s->in[s->first]->extended_data[c];
217
218 for (n = 0; n < in->nb_samples; n++) {
219 bin = lrint(av_clipf(fabsf(src2[n]), 0, 1) * (w - 1));
220
221 shistogram[bin]++;
222 }
223 }
224 }
225 break;
226 case ALOG:
227 for (c = 0; c < inlink->channels; c++) {
228 const float *src = (const float *)in->extended_data[c];
229 uint64_t *achistogram = &s->achistogram[(s->dmode == SINGLE ? 0: c) * w];
230
231 for (n = 0; n < in->nb_samples; n++) {
232 bin = lrint(av_clipf(1 + log10(fabsf(src[n])) / 6, 0, 1) * (w - 1));
233
234 achistogram[bin]++;
235 }
236
237 if (s->in[s->first] && s->count >= 0) {
238 uint64_t *shistogram = &s->shistogram[(s->dmode == SINGLE ? 0: c) * w];
239 const float *src2 = (const float *)s->in[s->first]->extended_data[c];
240
241 for (n = 0; n < in->nb_samples; n++) {
242 bin = lrint(av_clipf(1 + log10(fabsf(src2[n])) / 6, 0, 1) * (w - 1));
243
244 shistogram[bin]++;
245 }
246 }
247 }
248 break;
249 }
250
251 av_frame_free(&s->in[s->frame_count]);
252 s->in[s->frame_count] = in;
253 s->frame_count++;
254 if (s->frame_count > s->count)
255 s->frame_count = 0;
256
257 for (n = 0; n < w * s->dchannels; n++) {
258 acmax = FFMAX(s->achistogram[n] - s->shistogram[n], acmax);
259 }
260
261 for (c = 0; c < s->dchannels; c++) {
262 uint64_t *shistogram = &s->shistogram[c * w];
263 uint64_t *achistogram = &s->achistogram[c * w];
264 float yf, uf, vf;
265
266 if (s->dmode == SEPARATE) {
267 yf = 256.0f / s->dchannels;
268 uf = yf * M_PI;
269 vf = yf * M_PI;
270 uf *= 0.5 * sin((2 * M_PI * c) / s->dchannels);
271 vf *= 0.5 * cos((2 * M_PI * c) / s->dchannels);
272 }
273
274 for (n = 0; n < w; n++) {
275 double a, aa;
276 int h;
277
278 a = achistogram[n] - shistogram[n];
279
280 switch (s->scale) {
281 case LINEAR:
282 aa = a / (double)acmax;
283 break;
284 case SQRT:
285 aa = sqrt(a) / sqrt(acmax);
286 break;
287 case CBRT:
288 aa = cbrt(a) / cbrt(acmax);
289 break;
290 case LOG:
291 aa = log2(a + 1) / log2(acmax + 1);
292 break;
293 case RLOG:
294 aa = 1. - log2(a + 1) / log2(acmax + 1);
295 if (aa == 1.)
296 aa = 0;
297 break;
298 default:
299 av_assert0(0);
300 }
301
302 h = aa * (H - 1);
303
304 if (s->dmode == SINGLE) {
305
306 for (y = H - h; y < H; y++) {
307 s->out->data[0][y * s->out->linesize[0] + n] = 255;
308 s->out->data[3][y * s->out->linesize[0] + n] = 255;
309 }
310
311 if (s->h - H > 0) {
312 h = aa * 255;
313
314 s->out->data[0][s->ypos * s->out->linesize[0] + n] = h;
315 s->out->data[1][s->ypos * s->out->linesize[1] + n] = 127;
316 s->out->data[2][s->ypos * s->out->linesize[2] + n] = 127;
317 s->out->data[3][s->ypos * s->out->linesize[3] + n] = 255;
318 }
319 } else if (s->dmode == SEPARATE) {
320 float *out = &s->combine_buffer[3 * n];
321 int old;
322
323 old = s->out->data[0][(H - h) * s->out->linesize[0] + n];
324 for (y = H - h; y < H; y++) {
325 if (s->out->data[0][y * s->out->linesize[0] + n] != old)
326 break;
327 old = s->out->data[0][y * s->out->linesize[0] + n];
328 s->out->data[0][y * s->out->linesize[0] + n] = yf;
329 s->out->data[1][y * s->out->linesize[1] + n] = 128+uf;
330 s->out->data[2][y * s->out->linesize[2] + n] = 128+vf;
331 s->out->data[3][y * s->out->linesize[3] + n] = 255;
332 }
333
334 out[0] += aa * yf;
335 out[1] += aa * uf;
336 out[2] += aa * vf;
337 }
338 }
339 }
340
341 if (s->h - H > 0) {
342 if (s->dmode == SEPARATE) {
343 for (n = 0; n < w; n++) {
344 float *cb = &s->combine_buffer[3 * n];
345
346 s->out->data[0][s->ypos * s->out->linesize[0] + n] = cb[0];
347 s->out->data[1][s->ypos * s->out->linesize[1] + n] = cb[1];
348 s->out->data[2][s->ypos * s->out->linesize[2] + n] = cb[2];
349 s->out->data[3][s->ypos * s->out->linesize[3] + n] = 255;
350 }
351 }
352
353 if (s->slide == SCROLL) {
354 for (p = 0; p < 4; p++) {
355 for (y = s->h; y >= H + 1; y--) {
356 memmove(s->out->data[p] + (y ) * s->out->linesize[p],
357 s->out->data[p] + (y-1) * s->out->linesize[p], w);
358 }
359 }
360 }
361
362 s->ypos++;
363 if (s->slide == SCROLL || s->ypos >= s->h)
364 s->ypos = H;
365 }
366
367 clone = av_frame_clone(s->out);
368 if (!clone)
369 return AVERROR(ENOMEM);
370
371 return ff_filter_frame(outlink, clone);
372 }
373
activate(AVFilterContext * ctx)374 static int activate(AVFilterContext *ctx)
375 {
376 AVFilterLink *inlink = ctx->inputs[0];
377 AVFilterLink *outlink = ctx->outputs[0];
378 AudioHistogramContext *s = ctx->priv;
379 AVFrame *in;
380 int ret;
381
382 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
383
384 ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
385 if (ret < 0)
386 return ret;
387 if (ret > 0)
388 return filter_frame(inlink, in);
389
390 FF_FILTER_FORWARD_STATUS(inlink, outlink);
391 FF_FILTER_FORWARD_WANTED(outlink, inlink);
392
393 return FFERROR_NOT_READY;
394 }
395
uninit(AVFilterContext * ctx)396 static av_cold void uninit(AVFilterContext *ctx)
397 {
398 AudioHistogramContext *s = ctx->priv;
399 int i;
400
401 av_frame_free(&s->out);
402 av_freep(&s->shistogram);
403 av_freep(&s->achistogram);
404 av_freep(&s->combine_buffer);
405 for (i = 0; i < 101; i++)
406 av_frame_free(&s->in[i]);
407 }
408
409 static const AVFilterPad ahistogram_inputs[] = {
410 {
411 .name = "default",
412 .type = AVMEDIA_TYPE_AUDIO,
413 .config_props = config_input,
414 },
415 { NULL }
416 };
417
418 static const AVFilterPad ahistogram_outputs[] = {
419 {
420 .name = "default",
421 .type = AVMEDIA_TYPE_VIDEO,
422 .config_props = config_output,
423 },
424 { NULL }
425 };
426
427 AVFilter ff_avf_ahistogram = {
428 .name = "ahistogram",
429 .description = NULL_IF_CONFIG_SMALL("Convert input audio to histogram video output."),
430 .uninit = uninit,
431 .query_formats = query_formats,
432 .priv_size = sizeof(AudioHistogramContext),
433 .activate = activate,
434 .inputs = ahistogram_inputs,
435 .outputs = ahistogram_outputs,
436 .priv_class = &ahistogram_class,
437 };
438