1 /*
2 * Copyright (c) 2012 Stefano Sabatini
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 /**
22 * @file
23 * audio to video multimedia filter
24 */
25
26 #include "config_components.h"
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/channel_layout.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/parseutils.h"
33 #include "avfilter.h"
34 #include "filters.h"
35 #include "formats.h"
36 #include "audio.h"
37 #include "video.h"
38 #include "internal.h"
39
40 enum ShowWavesMode {
41 MODE_POINT,
42 MODE_LINE,
43 MODE_P2P,
44 MODE_CENTERED_LINE,
45 MODE_NB,
46 };
47
48 enum ShowWavesScale {
49 SCALE_LIN,
50 SCALE_LOG,
51 SCALE_SQRT,
52 SCALE_CBRT,
53 SCALE_NB,
54 };
55
56 enum ShowWavesDrawMode {
57 DRAW_SCALE,
58 DRAW_FULL,
59 DRAW_NB,
60 };
61
62 enum ShowWavesFilterMode {
63 FILTER_AVERAGE,
64 FILTER_PEAK,
65 FILTER_NB,
66 };
67
68 struct frame_node {
69 AVFrame *frame;
70 struct frame_node *next;
71 };
72
73 typedef struct ShowWavesContext {
74 const AVClass *class;
75 int w, h;
76 AVRational rate;
77 char *colors;
78 int buf_idx;
79 int16_t *buf_idy; /* y coordinate of previous sample for each channel */
80 AVFrame *outpicref;
81 int n;
82 int pixstep;
83 int sample_count_mod;
84 int mode; ///< ShowWavesMode
85 int scale; ///< ShowWavesScale
86 int draw_mode; ///< ShowWavesDrawMode
87 int split_channels;
88 int filter_mode;
89 uint8_t *fg;
90
91 int (*get_h)(int16_t sample, int height);
92 void (*draw_sample)(uint8_t *buf, int height, int linesize,
93 int16_t *prev_y, const uint8_t color[4], int h);
94
95 /* single picture */
96 int single_pic;
97 struct frame_node *audio_frames;
98 struct frame_node *last_frame;
99 int64_t total_samples;
100 int64_t *sum; /* abs sum of the samples per channel */
101 } ShowWavesContext;
102
103 #define OFFSET(x) offsetof(ShowWavesContext, x)
104 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
105
106 static const AVOption showwaves_options[] = {
107 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
108 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
109 { "mode", "select display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_POINT}, 0, MODE_NB-1, FLAGS, "mode"},
110 { "point", "draw a point for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_POINT}, .flags=FLAGS, .unit="mode"},
111 { "line", "draw a line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_LINE}, .flags=FLAGS, .unit="mode"},
112 { "p2p", "draw a line between samples", 0, AV_OPT_TYPE_CONST, {.i64=MODE_P2P}, .flags=FLAGS, .unit="mode"},
113 { "cline", "draw a centered line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_CENTERED_LINE}, .flags=FLAGS, .unit="mode"},
114 { "n", "set how many samples to show in the same point", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
115 { "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, FLAGS },
116 { "r", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, FLAGS },
117 { "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
118 { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
119 { "scale", "set amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, SCALE_NB-1, FLAGS, .unit="scale" },
120 { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LIN}, .flags=FLAGS, .unit="scale"},
121 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LOG}, .flags=FLAGS, .unit="scale"},
122 { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_SQRT}, .flags=FLAGS, .unit="scale"},
123 { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_CBRT}, .flags=FLAGS, .unit="scale"},
124 { "draw", "set draw mode", OFFSET(draw_mode), AV_OPT_TYPE_INT, {.i64 = DRAW_SCALE}, 0, DRAW_NB-1, FLAGS, .unit="draw" },
125 { "scale", "scale pixel values for each drawn sample", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_SCALE}, .flags=FLAGS, .unit="draw"},
126 { "full", "draw every pixel for sample directly", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_FULL}, .flags=FLAGS, .unit="draw"},
127 { NULL }
128 };
129
130 AVFILTER_DEFINE_CLASS(showwaves);
131
uninit(AVFilterContext * ctx)132 static av_cold void uninit(AVFilterContext *ctx)
133 {
134 ShowWavesContext *showwaves = ctx->priv;
135
136 av_frame_free(&showwaves->outpicref);
137 av_freep(&showwaves->buf_idy);
138 av_freep(&showwaves->fg);
139
140 if (showwaves->single_pic) {
141 struct frame_node *node = showwaves->audio_frames;
142 while (node) {
143 struct frame_node *tmp = node;
144
145 node = node->next;
146 av_frame_free(&tmp->frame);
147 av_freep(&tmp);
148 }
149 av_freep(&showwaves->sum);
150 showwaves->last_frame = NULL;
151 }
152 }
153
query_formats(AVFilterContext * ctx)154 static int query_formats(AVFilterContext *ctx)
155 {
156 AVFilterFormats *formats = NULL;
157 AVFilterChannelLayouts *layouts = NULL;
158 AVFilterLink *inlink = ctx->inputs[0];
159 AVFilterLink *outlink = ctx->outputs[0];
160 static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
161 static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
162 int ret;
163
164 /* set input audio formats */
165 formats = ff_make_format_list(sample_fmts);
166 if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
167 return ret;
168
169 layouts = ff_all_channel_layouts();
170 if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
171 return ret;
172
173 formats = ff_all_samplerates();
174 if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
175 return ret;
176
177 /* set output video format */
178 formats = ff_make_format_list(pix_fmts);
179 if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
180 return ret;
181
182 return 0;
183 }
184
get_lin_h(int16_t sample,int height)185 static int get_lin_h(int16_t sample, int height)
186 {
187 return height/2 - av_rescale(sample, height/2, INT16_MAX);
188 }
189
get_lin_h2(int16_t sample,int height)190 static int get_lin_h2(int16_t sample, int height)
191 {
192 return av_rescale(FFABS(sample), height, INT16_MAX);
193 }
194
get_log_h(int16_t sample,int height)195 static int get_log_h(int16_t sample, int height)
196 {
197 return height/2 - FFSIGN(sample) * (log10(1 + FFABS(sample)) * (height/2) / log10(1 + INT16_MAX));
198 }
199
get_log_h2(int16_t sample,int height)200 static int get_log_h2(int16_t sample, int height)
201 {
202 return log10(1 + FFABS(sample)) * height / log10(1 + INT16_MAX);
203 }
204
get_sqrt_h(int16_t sample,int height)205 static int get_sqrt_h(int16_t sample, int height)
206 {
207 return height/2 - FFSIGN(sample) * (sqrt(FFABS(sample)) * (height/2) / sqrt(INT16_MAX));
208 }
209
get_sqrt_h2(int16_t sample,int height)210 static int get_sqrt_h2(int16_t sample, int height)
211 {
212 return sqrt(FFABS(sample)) * height / sqrt(INT16_MAX);
213 }
214
get_cbrt_h(int16_t sample,int height)215 static int get_cbrt_h(int16_t sample, int height)
216 {
217 return height/2 - FFSIGN(sample) * (cbrt(FFABS(sample)) * (height/2) / cbrt(INT16_MAX));
218 }
219
get_cbrt_h2(int16_t sample,int height)220 static int get_cbrt_h2(int16_t sample, int height)
221 {
222 return cbrt(FFABS(sample)) * height / cbrt(INT16_MAX);
223 }
224
draw_sample_point_rgba_scale(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)225 static void draw_sample_point_rgba_scale(uint8_t *buf, int height, int linesize,
226 int16_t *prev_y,
227 const uint8_t color[4], int h)
228 {
229 if (h >= 0 && h < height) {
230 buf[h * linesize + 0] += color[0];
231 buf[h * linesize + 1] += color[1];
232 buf[h * linesize + 2] += color[2];
233 buf[h * linesize + 3] += color[3];
234 }
235 }
236
draw_sample_point_rgba_full(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)237 static void draw_sample_point_rgba_full(uint8_t *buf, int height, int linesize,
238 int16_t *prev_y,
239 const uint8_t color[4], int h)
240 {
241 if (h >= 0 && h < height) {
242 buf[h * linesize + 0] = color[0];
243 buf[h * linesize + 1] = color[1];
244 buf[h * linesize + 2] = color[2];
245 buf[h * linesize + 3] = color[3];
246 }
247 }
248
draw_sample_line_rgba_scale(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)249 static void draw_sample_line_rgba_scale(uint8_t *buf, int height, int linesize,
250 int16_t *prev_y,
251 const uint8_t color[4], int h)
252 {
253 int k;
254 int start = height/2;
255 int end = av_clip(h, 0, height-1);
256 if (start > end)
257 FFSWAP(int16_t, start, end);
258 for (k = start; k < end; k++) {
259 buf[k * linesize + 0] += color[0];
260 buf[k * linesize + 1] += color[1];
261 buf[k * linesize + 2] += color[2];
262 buf[k * linesize + 3] += color[3];
263 }
264 }
265
draw_sample_line_rgba_full(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)266 static void draw_sample_line_rgba_full(uint8_t *buf, int height, int linesize,
267 int16_t *prev_y,
268 const uint8_t color[4], int h)
269 {
270 int k;
271 int start = height/2;
272 int end = av_clip(h, 0, height-1);
273 if (start > end)
274 FFSWAP(int16_t, start, end);
275 for (k = start; k < end; k++) {
276 buf[k * linesize + 0] = color[0];
277 buf[k * linesize + 1] = color[1];
278 buf[k * linesize + 2] = color[2];
279 buf[k * linesize + 3] = color[3];
280 }
281 }
282
draw_sample_p2p_rgba_scale(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)283 static void draw_sample_p2p_rgba_scale(uint8_t *buf, int height, int linesize,
284 int16_t *prev_y,
285 const uint8_t color[4], int h)
286 {
287 int k;
288 if (h >= 0 && h < height) {
289 buf[h * linesize + 0] += color[0];
290 buf[h * linesize + 1] += color[1];
291 buf[h * linesize + 2] += color[2];
292 buf[h * linesize + 3] += color[3];
293 if (*prev_y && h != *prev_y) {
294 int start = *prev_y;
295 int end = av_clip(h, 0, height-1);
296 if (start > end)
297 FFSWAP(int16_t, start, end);
298 for (k = start + 1; k < end; k++) {
299 buf[k * linesize + 0] += color[0];
300 buf[k * linesize + 1] += color[1];
301 buf[k * linesize + 2] += color[2];
302 buf[k * linesize + 3] += color[3];
303 }
304 }
305 }
306 *prev_y = h;
307 }
308
draw_sample_p2p_rgba_full(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)309 static void draw_sample_p2p_rgba_full(uint8_t *buf, int height, int linesize,
310 int16_t *prev_y,
311 const uint8_t color[4], int h)
312 {
313 int k;
314 if (h >= 0 && h < height) {
315 buf[h * linesize + 0] = color[0];
316 buf[h * linesize + 1] = color[1];
317 buf[h * linesize + 2] = color[2];
318 buf[h * linesize + 3] = color[3];
319 if (*prev_y && h != *prev_y) {
320 int start = *prev_y;
321 int end = av_clip(h, 0, height-1);
322 if (start > end)
323 FFSWAP(int16_t, start, end);
324 for (k = start + 1; k < end; k++) {
325 buf[k * linesize + 0] = color[0];
326 buf[k * linesize + 1] = color[1];
327 buf[k * linesize + 2] = color[2];
328 buf[k * linesize + 3] = color[3];
329 }
330 }
331 }
332 *prev_y = h;
333 }
334
draw_sample_cline_rgba_scale(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)335 static void draw_sample_cline_rgba_scale(uint8_t *buf, int height, int linesize,
336 int16_t *prev_y,
337 const uint8_t color[4], int h)
338 {
339 int k;
340 const int start = (height - h) / 2;
341 const int end = start + h;
342 for (k = start; k < end; k++) {
343 buf[k * linesize + 0] += color[0];
344 buf[k * linesize + 1] += color[1];
345 buf[k * linesize + 2] += color[2];
346 buf[k * linesize + 3] += color[3];
347 }
348 }
draw_sample_cline_rgba_full(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)349 static void draw_sample_cline_rgba_full(uint8_t *buf, int height, int linesize,
350 int16_t *prev_y,
351 const uint8_t color[4], int h)
352 {
353 int k;
354 const int start = (height - h) / 2;
355 const int end = start + h;
356 for (k = start; k < end; k++) {
357 buf[k * linesize + 0] = color[0];
358 buf[k * linesize + 1] = color[1];
359 buf[k * linesize + 2] = color[2];
360 buf[k * linesize + 3] = color[3];
361 }
362 }
363
draw_sample_point_gray(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)364 static void draw_sample_point_gray(uint8_t *buf, int height, int linesize,
365 int16_t *prev_y,
366 const uint8_t color[4], int h)
367 {
368 if (h >= 0 && h < height)
369 buf[h * linesize] += color[0];
370 }
371
draw_sample_line_gray(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)372 static void draw_sample_line_gray(uint8_t *buf, int height, int linesize,
373 int16_t *prev_y,
374 const uint8_t color[4], int h)
375 {
376 int k;
377 int start = height/2;
378 int end = av_clip(h, 0, height-1);
379 if (start > end)
380 FFSWAP(int16_t, start, end);
381 for (k = start; k < end; k++)
382 buf[k * linesize] += color[0];
383 }
384
draw_sample_p2p_gray(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)385 static void draw_sample_p2p_gray(uint8_t *buf, int height, int linesize,
386 int16_t *prev_y,
387 const uint8_t color[4], int h)
388 {
389 int k;
390 if (h >= 0 && h < height) {
391 buf[h * linesize] += color[0];
392 if (*prev_y && h != *prev_y) {
393 int start = *prev_y;
394 int end = av_clip(h, 0, height-1);
395 if (start > end)
396 FFSWAP(int16_t, start, end);
397 for (k = start + 1; k < end; k++)
398 buf[k * linesize] += color[0];
399 }
400 }
401 *prev_y = h;
402 }
403
draw_sample_cline_gray(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)404 static void draw_sample_cline_gray(uint8_t *buf, int height, int linesize,
405 int16_t *prev_y,
406 const uint8_t color[4], int h)
407 {
408 int k;
409 const int start = (height - h) / 2;
410 const int end = start + h;
411 for (k = start; k < end; k++)
412 buf[k * linesize] += color[0];
413 }
414
config_output(AVFilterLink * outlink)415 static int config_output(AVFilterLink *outlink)
416 {
417 AVFilterContext *ctx = outlink->src;
418 AVFilterLink *inlink = ctx->inputs[0];
419 ShowWavesContext *showwaves = ctx->priv;
420 int nb_channels = inlink->ch_layout.nb_channels;
421 char *colors, *saveptr = NULL;
422 uint8_t x;
423 int ch;
424
425 if (showwaves->single_pic)
426 showwaves->n = 1;
427
428 if (!showwaves->n)
429 showwaves->n = FFMAX(1, av_rescale_q(inlink->sample_rate, av_make_q(1, showwaves->w), showwaves->rate));
430
431 showwaves->buf_idx = 0;
432 if (!FF_ALLOCZ_TYPED_ARRAY(showwaves->buf_idy, nb_channels)) {
433 av_log(ctx, AV_LOG_ERROR, "Could not allocate showwaves buffer\n");
434 return AVERROR(ENOMEM);
435 }
436 outlink->w = showwaves->w;
437 outlink->h = showwaves->h;
438 outlink->sample_aspect_ratio = (AVRational){1,1};
439
440 if (showwaves->single_pic)
441 outlink->frame_rate = av_make_q(1, 1);
442 else
443 outlink->frame_rate = av_div_q((AVRational){inlink->sample_rate,showwaves->n},
444 (AVRational){showwaves->w,1});
445
446 av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d r:%f n:%d\n",
447 showwaves->w, showwaves->h, av_q2d(outlink->frame_rate), showwaves->n);
448
449 switch (outlink->format) {
450 case AV_PIX_FMT_GRAY8:
451 switch (showwaves->mode) {
452 case MODE_POINT: showwaves->draw_sample = draw_sample_point_gray; break;
453 case MODE_LINE: showwaves->draw_sample = draw_sample_line_gray; break;
454 case MODE_P2P: showwaves->draw_sample = draw_sample_p2p_gray; break;
455 case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline_gray; break;
456 default:
457 return AVERROR_BUG;
458 }
459 showwaves->pixstep = 1;
460 break;
461 case AV_PIX_FMT_RGBA:
462 switch (showwaves->mode) {
463 case MODE_POINT: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_point_rgba_scale : draw_sample_point_rgba_full; break;
464 case MODE_LINE: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_line_rgba_scale : draw_sample_line_rgba_full; break;
465 case MODE_P2P: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_p2p_rgba_scale : draw_sample_p2p_rgba_full; break;
466 case MODE_CENTERED_LINE: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_cline_rgba_scale : draw_sample_cline_rgba_full; break;
467 default:
468 return AVERROR_BUG;
469 }
470 showwaves->pixstep = 4;
471 break;
472 }
473
474 switch (showwaves->scale) {
475 case SCALE_LIN:
476 switch (showwaves->mode) {
477 case MODE_POINT:
478 case MODE_LINE:
479 case MODE_P2P: showwaves->get_h = get_lin_h; break;
480 case MODE_CENTERED_LINE: showwaves->get_h = get_lin_h2; break;
481 default:
482 return AVERROR_BUG;
483 }
484 break;
485 case SCALE_LOG:
486 switch (showwaves->mode) {
487 case MODE_POINT:
488 case MODE_LINE:
489 case MODE_P2P: showwaves->get_h = get_log_h; break;
490 case MODE_CENTERED_LINE: showwaves->get_h = get_log_h2; break;
491 default:
492 return AVERROR_BUG;
493 }
494 break;
495 case SCALE_SQRT:
496 switch (showwaves->mode) {
497 case MODE_POINT:
498 case MODE_LINE:
499 case MODE_P2P: showwaves->get_h = get_sqrt_h; break;
500 case MODE_CENTERED_LINE: showwaves->get_h = get_sqrt_h2; break;
501 default:
502 return AVERROR_BUG;
503 }
504 break;
505 case SCALE_CBRT:
506 switch (showwaves->mode) {
507 case MODE_POINT:
508 case MODE_LINE:
509 case MODE_P2P: showwaves->get_h = get_cbrt_h; break;
510 case MODE_CENTERED_LINE: showwaves->get_h = get_cbrt_h2; break;
511 default:
512 return AVERROR_BUG;
513 }
514 break;
515 }
516
517 showwaves->fg = av_malloc_array(nb_channels, 4 * sizeof(*showwaves->fg));
518 if (!showwaves->fg)
519 return AVERROR(ENOMEM);
520
521 colors = av_strdup(showwaves->colors);
522 if (!colors)
523 return AVERROR(ENOMEM);
524
525 if (showwaves->draw_mode == DRAW_SCALE) {
526 /* multiplication factor, pre-computed to avoid in-loop divisions */
527 x = 255 / ((showwaves->split_channels ? 1 : nb_channels) * showwaves->n);
528 } else {
529 x = 255;
530 }
531 if (outlink->format == AV_PIX_FMT_RGBA) {
532 uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
533
534 for (ch = 0; ch < nb_channels; ch++) {
535 char *color;
536
537 color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
538 if (color)
539 av_parse_color(fg, color, -1, ctx);
540 showwaves->fg[4*ch + 0] = fg[0] * x / 255.;
541 showwaves->fg[4*ch + 1] = fg[1] * x / 255.;
542 showwaves->fg[4*ch + 2] = fg[2] * x / 255.;
543 showwaves->fg[4*ch + 3] = fg[3] * x / 255.;
544 }
545 } else {
546 for (ch = 0; ch < nb_channels; ch++)
547 showwaves->fg[4 * ch + 0] = x;
548 }
549 av_free(colors);
550
551 return 0;
552 }
553
push_frame(AVFilterLink * outlink)554 inline static int push_frame(AVFilterLink *outlink)
555 {
556 AVFilterContext *ctx = outlink->src;
557 AVFilterLink *inlink = ctx->inputs[0];
558 ShowWavesContext *showwaves = outlink->src->priv;
559 int nb_channels = inlink->ch_layout.nb_channels;
560 int ret, i;
561
562 ret = ff_filter_frame(outlink, showwaves->outpicref);
563 showwaves->outpicref = NULL;
564 showwaves->buf_idx = 0;
565 for (i = 0; i < nb_channels; i++)
566 showwaves->buf_idy[i] = 0;
567 return ret;
568 }
569
push_single_pic(AVFilterLink * outlink)570 static int push_single_pic(AVFilterLink *outlink)
571 {
572 AVFilterContext *ctx = outlink->src;
573 AVFilterLink *inlink = ctx->inputs[0];
574 ShowWavesContext *showwaves = ctx->priv;
575 int64_t n = 0, column_max_samples = showwaves->total_samples / outlink->w;
576 int64_t remaining_samples = showwaves->total_samples - (column_max_samples * outlink->w);
577 int64_t last_column_samples = column_max_samples + remaining_samples;
578 AVFrame *out = showwaves->outpicref;
579 struct frame_node *node;
580 const int nb_channels = inlink->ch_layout.nb_channels;
581 const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
582 const int linesize = out->linesize[0];
583 const int pixstep = showwaves->pixstep;
584 int col = 0;
585 int64_t *sum = showwaves->sum;
586
587 if (column_max_samples == 0) {
588 av_log(ctx, AV_LOG_ERROR, "Too few samples\n");
589 return AVERROR(EINVAL);
590 }
591
592 av_log(ctx, AV_LOG_DEBUG, "Create frame averaging %"PRId64" samples per column\n", column_max_samples);
593
594 memset(sum, 0, nb_channels);
595
596 for (node = showwaves->audio_frames; node; node = node->next) {
597 int i;
598 const AVFrame *frame = node->frame;
599 const int16_t *p = (const int16_t *)frame->data[0];
600
601 for (i = 0; i < frame->nb_samples; i++) {
602 int64_t max_samples = col == outlink->w - 1 ? last_column_samples: column_max_samples;
603 int ch;
604
605 switch (showwaves->filter_mode) {
606 case FILTER_AVERAGE:
607 for (ch = 0; ch < nb_channels; ch++)
608 sum[ch] += abs(p[ch + i*nb_channels]);
609 break;
610 case FILTER_PEAK:
611 for (ch = 0; ch < nb_channels; ch++)
612 sum[ch] = FFMAX(sum[ch], abs(p[ch + i*nb_channels]));
613 break;
614 }
615
616 n++;
617 if (n == max_samples) {
618 for (ch = 0; ch < nb_channels; ch++) {
619 int16_t sample = sum[ch] / (showwaves->filter_mode == FILTER_AVERAGE ? max_samples : 1);
620 uint8_t *buf = out->data[0] + col * pixstep;
621 int h;
622
623 if (showwaves->split_channels)
624 buf += ch*ch_height*linesize;
625 av_assert0(col < outlink->w);
626 h = showwaves->get_h(sample, ch_height);
627 showwaves->draw_sample(buf, ch_height, linesize, &showwaves->buf_idy[ch], &showwaves->fg[ch * 4], h);
628 sum[ch] = 0;
629 }
630 col++;
631 n = 0;
632 }
633 }
634 }
635
636 return push_frame(outlink);
637 }
638
639
request_frame(AVFilterLink * outlink)640 static int request_frame(AVFilterLink *outlink)
641 {
642 ShowWavesContext *showwaves = outlink->src->priv;
643 AVFilterLink *inlink = outlink->src->inputs[0];
644 int ret;
645
646 ret = ff_request_frame(inlink);
647 if (ret == AVERROR_EOF && showwaves->outpicref) {
648 if (showwaves->single_pic)
649 push_single_pic(outlink);
650 else
651 push_frame(outlink);
652 }
653
654 return ret;
655 }
656
alloc_out_frame(ShowWavesContext * showwaves,const int16_t * p,const AVFilterLink * inlink,AVFilterLink * outlink,const AVFrame * in)657 static int alloc_out_frame(ShowWavesContext *showwaves, const int16_t *p,
658 const AVFilterLink *inlink, AVFilterLink *outlink,
659 const AVFrame *in)
660 {
661 if (!showwaves->outpicref) {
662 int j;
663 AVFrame *out = showwaves->outpicref =
664 ff_get_video_buffer(outlink, outlink->w, outlink->h);
665 if (!out)
666 return AVERROR(ENOMEM);
667 out->width = outlink->w;
668 out->height = outlink->h;
669 out->pts = in->pts + av_rescale_q((p - (int16_t *)in->data[0]) / inlink->ch_layout.nb_channels,
670 av_make_q(1, inlink->sample_rate),
671 outlink->time_base);
672 for (j = 0; j < outlink->h; j++)
673 memset(out->data[0] + j*out->linesize[0], 0, outlink->w * showwaves->pixstep);
674 }
675 return 0;
676 }
677
init(AVFilterContext * ctx)678 static av_cold int init(AVFilterContext *ctx)
679 {
680 ShowWavesContext *showwaves = ctx->priv;
681
682 if (!strcmp(ctx->filter->name, "showwavespic")) {
683 showwaves->single_pic = 1;
684 showwaves->mode = MODE_CENTERED_LINE;
685 }
686
687 return 0;
688 }
689
690 #if CONFIG_SHOWWAVES_FILTER
691
showwaves_filter_frame(AVFilterLink * inlink,AVFrame * insamples)692 static int showwaves_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
693 {
694 AVFilterContext *ctx = inlink->dst;
695 AVFilterLink *outlink = ctx->outputs[0];
696 ShowWavesContext *showwaves = ctx->priv;
697 const int nb_samples = insamples->nb_samples;
698 AVFrame *outpicref = showwaves->outpicref;
699 int16_t *p = (int16_t *)insamples->data[0];
700 int nb_channels = inlink->ch_layout.nb_channels;
701 int i, j, ret = 0;
702 const int pixstep = showwaves->pixstep;
703 const int n = showwaves->n;
704 const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
705
706 /* draw data in the buffer */
707 for (i = 0; i < nb_samples; i++) {
708
709 ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
710 if (ret < 0)
711 goto end;
712 outpicref = showwaves->outpicref;
713
714 for (j = 0; j < nb_channels; j++) {
715 uint8_t *buf = outpicref->data[0] + showwaves->buf_idx * pixstep;
716 const int linesize = outpicref->linesize[0];
717 int h;
718
719 if (showwaves->split_channels)
720 buf += j*ch_height*linesize;
721 h = showwaves->get_h(*p++, ch_height);
722 showwaves->draw_sample(buf, ch_height, linesize,
723 &showwaves->buf_idy[j], &showwaves->fg[j * 4], h);
724 }
725
726 showwaves->sample_count_mod++;
727 if (showwaves->sample_count_mod == n) {
728 showwaves->sample_count_mod = 0;
729 showwaves->buf_idx++;
730 }
731 if (showwaves->buf_idx == showwaves->w ||
732 (ff_outlink_get_status(inlink) && i == nb_samples - 1))
733 if ((ret = push_frame(outlink)) < 0)
734 break;
735 outpicref = showwaves->outpicref;
736 }
737
738 end:
739 av_frame_free(&insamples);
740 return ret;
741 }
742
activate(AVFilterContext * ctx)743 static int activate(AVFilterContext *ctx)
744 {
745 AVFilterLink *inlink = ctx->inputs[0];
746 AVFilterLink *outlink = ctx->outputs[0];
747 ShowWavesContext *showwaves = ctx->priv;
748 AVFrame *in;
749 const int nb_samples = showwaves->n * outlink->w;
750 int ret;
751
752 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
753
754 ret = ff_inlink_consume_samples(inlink, nb_samples, nb_samples, &in);
755 if (ret < 0)
756 return ret;
757 if (ret > 0)
758 return showwaves_filter_frame(inlink, in);
759
760 FF_FILTER_FORWARD_STATUS(inlink, outlink);
761 FF_FILTER_FORWARD_WANTED(outlink, inlink);
762
763 return FFERROR_NOT_READY;
764 }
765
766 static const AVFilterPad showwaves_inputs[] = {
767 {
768 .name = "default",
769 .type = AVMEDIA_TYPE_AUDIO,
770 },
771 };
772
773 static const AVFilterPad showwaves_outputs[] = {
774 {
775 .name = "default",
776 .type = AVMEDIA_TYPE_VIDEO,
777 .config_props = config_output,
778 },
779 };
780
781 const AVFilter ff_avf_showwaves = {
782 .name = "showwaves",
783 .description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output."),
784 .init = init,
785 .uninit = uninit,
786 .priv_size = sizeof(ShowWavesContext),
787 FILTER_INPUTS(showwaves_inputs),
788 .activate = activate,
789 FILTER_OUTPUTS(showwaves_outputs),
790 FILTER_QUERY_FUNC(query_formats),
791 .priv_class = &showwaves_class,
792 };
793
794 #endif // CONFIG_SHOWWAVES_FILTER
795
796 #if CONFIG_SHOWWAVESPIC_FILTER
797
798 #define OFFSET(x) offsetof(ShowWavesContext, x)
799 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
800
801 static const AVOption showwavespic_options[] = {
802 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
803 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
804 { "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
805 { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
806 { "scale", "set amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, SCALE_NB-1, FLAGS, .unit="scale" },
807 { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LIN}, .flags=FLAGS, .unit="scale"},
808 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LOG}, .flags=FLAGS, .unit="scale"},
809 { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_SQRT}, .flags=FLAGS, .unit="scale"},
810 { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_CBRT}, .flags=FLAGS, .unit="scale"},
811 { "draw", "set draw mode", OFFSET(draw_mode), AV_OPT_TYPE_INT, {.i64 = DRAW_SCALE}, 0, DRAW_NB-1, FLAGS, .unit="draw" },
812 { "scale", "scale pixel values for each drawn sample", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_SCALE}, .flags=FLAGS, .unit="draw"},
813 { "full", "draw every pixel for sample directly", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_FULL}, .flags=FLAGS, .unit="draw"},
814 { "filter", "set filter mode", OFFSET(filter_mode), AV_OPT_TYPE_INT, {.i64 = FILTER_AVERAGE}, 0, FILTER_NB-1, FLAGS, .unit="filter" },
815 { "average", "use average samples", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_AVERAGE}, .flags=FLAGS, .unit="filter"},
816 { "peak", "use peak samples", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_PEAK}, .flags=FLAGS, .unit="filter"},
817 { NULL }
818 };
819
820 AVFILTER_DEFINE_CLASS(showwavespic);
821
showwavespic_config_input(AVFilterLink * inlink)822 static int showwavespic_config_input(AVFilterLink *inlink)
823 {
824 AVFilterContext *ctx = inlink->dst;
825 ShowWavesContext *showwaves = ctx->priv;
826
827 if (showwaves->single_pic) {
828 showwaves->sum = av_calloc(inlink->ch_layout.nb_channels, sizeof(*showwaves->sum));
829 if (!showwaves->sum)
830 return AVERROR(ENOMEM);
831 }
832
833 return 0;
834 }
835
showwavespic_filter_frame(AVFilterLink * inlink,AVFrame * insamples)836 static int showwavespic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
837 {
838 AVFilterContext *ctx = inlink->dst;
839 AVFilterLink *outlink = ctx->outputs[0];
840 ShowWavesContext *showwaves = ctx->priv;
841 int16_t *p = (int16_t *)insamples->data[0];
842 int ret = 0;
843
844 if (showwaves->single_pic) {
845 struct frame_node *f;
846
847 ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
848 if (ret < 0)
849 goto end;
850
851 /* queue the audio frame */
852 f = av_malloc(sizeof(*f));
853 if (!f) {
854 ret = AVERROR(ENOMEM);
855 goto end;
856 }
857 f->frame = insamples;
858 f->next = NULL;
859 if (!showwaves->last_frame) {
860 showwaves->audio_frames =
861 showwaves->last_frame = f;
862 } else {
863 showwaves->last_frame->next = f;
864 showwaves->last_frame = f;
865 }
866 showwaves->total_samples += insamples->nb_samples;
867
868 return 0;
869 }
870
871 end:
872 av_frame_free(&insamples);
873 return ret;
874 }
875
876 static const AVFilterPad showwavespic_inputs[] = {
877 {
878 .name = "default",
879 .type = AVMEDIA_TYPE_AUDIO,
880 .config_props = showwavespic_config_input,
881 .filter_frame = showwavespic_filter_frame,
882 },
883 };
884
885 static const AVFilterPad showwavespic_outputs[] = {
886 {
887 .name = "default",
888 .type = AVMEDIA_TYPE_VIDEO,
889 .config_props = config_output,
890 .request_frame = request_frame,
891 },
892 };
893
894 const AVFilter ff_avf_showwavespic = {
895 .name = "showwavespic",
896 .description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output single picture."),
897 .init = init,
898 .uninit = uninit,
899 .priv_size = sizeof(ShowWavesContext),
900 FILTER_INPUTS(showwavespic_inputs),
901 FILTER_OUTPUTS(showwavespic_outputs),
902 FILTER_QUERY_FUNC(query_formats),
903 .priv_class = &showwavespic_class,
904 };
905
906 #endif // CONFIG_SHOWWAVESPIC_FILTER
907