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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 "libavutil/avassert.h"
27#include "libavutil/avstring.h"
28#include "libavutil/channel_layout.h"
29#include "libavutil/opt.h"
30#include "libavutil/parseutils.h"
31#include "avfilter.h"
32#include "formats.h"
33#include "audio.h"
34#include "video.h"
35#include "internal.h"
36
37enum ShowWavesMode {
38 MODE_POINT,
39 MODE_LINE,
40 MODE_P2P,
41 MODE_CENTERED_LINE,
42 MODE_NB,
43};
44
45enum ShowWavesScale {
46 SCALE_LIN,
47 SCALE_LOG,
48 SCALE_SQRT,
49 SCALE_CBRT,
50 SCALE_NB,
51};
52
53struct frame_node {
54 AVFrame *frame;
55 struct frame_node *next;
56};
57
58typedef struct {
59 const AVClass *class;
60 int w, h;
61 AVRational rate;
62 char *colors;
63 int buf_idx;
64 int16_t *buf_idy; /* y coordinate of previous sample for each channel */
65 AVFrame *outpicref;
66 int n;
67 int pixstep;
68 int sample_count_mod;
69 int mode; ///< ShowWavesMode
70 int scale; ///< ShowWavesScale
71 int split_channels;
72 uint8_t *fg;
73
74 int (*get_h)(int16_t sample, int height);
75 void (*draw_sample)(uint8_t *buf, int height, int linesize,
76 int16_t *prev_y, const uint8_t color[4], int h);
77
78 /* single picture */
79 int single_pic;
80 struct frame_node *audio_frames;
81 struct frame_node *last_frame;
82 int64_t total_samples;
83 int64_t *sum; /* abs sum of the samples per channel */
84} ShowWavesContext;
85
86#define OFFSET(x) offsetof(ShowWavesContext, x)
87#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
88
89static const AVOption showwaves_options[] = {
90 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
91 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
92 { "mode", "select display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_POINT}, 0, MODE_NB-1, FLAGS, "mode"},
93 { "point", "draw a point for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_POINT}, .flags=FLAGS, .unit="mode"},
94 { "line", "draw a line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_LINE}, .flags=FLAGS, .unit="mode"},
95 { "p2p", "draw a line between samples", 0, AV_OPT_TYPE_CONST, {.i64=MODE_P2P}, .flags=FLAGS, .unit="mode"},
96 { "cline", "draw a centered line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_CENTERED_LINE}, .flags=FLAGS, .unit="mode"},
97 { "n", "set how many samples to show in the same point", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
98 { "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, FLAGS },
99 { "r", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, FLAGS },
100 { "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
101 { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
102 { "scale", "set amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, SCALE_NB-1, FLAGS, .unit="scale" },
103 { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LIN}, .flags=FLAGS, .unit="scale"},
104 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LOG}, .flags=FLAGS, .unit="scale"},
105 { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_SQRT}, .flags=FLAGS, .unit="scale"},
106 { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_CBRT}, .flags=FLAGS, .unit="scale"},
107 { NULL }
108};
109
110AVFILTER_DEFINE_CLASS(showwaves);
111
112static av_cold void uninit(AVFilterContext *ctx)
113{
114 ShowWavesContext *showwaves = ctx->priv;
115
116 av_frame_free(&showwaves->outpicref);
117 av_freep(&showwaves->buf_idy);
118 av_freep(&showwaves->fg);
119
120 if (showwaves->single_pic) {
121 struct frame_node *node = showwaves->audio_frames;
122 while (node) {
123 struct frame_node *tmp = node;
124
125 node = node->next;
126 av_frame_free(&tmp->frame);
127 av_freep(&tmp);
128 }
129 av_freep(&showwaves->sum);
130 showwaves->last_frame = NULL;
131 }
132}
133
134static int query_formats(AVFilterContext *ctx)
135{
136 AVFilterFormats *formats = NULL;
137 AVFilterChannelLayouts *layouts = NULL;
138 AVFilterLink *inlink = ctx->inputs[0];
139 AVFilterLink *outlink = ctx->outputs[0];
140 static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
141 static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
142 int ret;
143
144 /* set input audio formats */
145 formats = ff_make_format_list(sample_fmts);
146 if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)
147 return ret;
148
149 layouts = ff_all_channel_layouts();
150 if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)
151 return ret;
152
153 formats = ff_all_samplerates();
154 if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
155 return ret;
156
157 /* set output video format */
158 formats = ff_make_format_list(pix_fmts);
159 if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
160 return ret;
161
162 return 0;
163}
164
165static int get_lin_h(int16_t sample, int height)
166{
167 return height/2 - av_rescale(sample, height/2, INT16_MAX);
168}
169
170static int get_lin_h2(int16_t sample, int height)
171{
172 return av_rescale(FFABS(sample), height, INT16_MAX);
173}
174
175static int get_log_h(int16_t sample, int height)
176{
177 return height/2 - FFSIGN(sample) * (log10(1 + FFABS(sample)) * (height/2) / log10(1 + INT16_MAX));
178}
179
180static int get_log_h2(int16_t sample, int height)
181{
182 return log10(1 + FFABS(sample)) * height / log10(1 + INT16_MAX);
183}
184
185static int get_sqrt_h(int16_t sample, int height)
186{
187 return height/2 - FFSIGN(sample) * (sqrt(FFABS(sample)) * (height/2) / sqrt(INT16_MAX));
188}
189
190static int get_sqrt_h2(int16_t sample, int height)
191{
192 return sqrt(FFABS(sample)) * height / sqrt(INT16_MAX);
193}
194
195static int get_cbrt_h(int16_t sample, int height)
196{
197 return height/2 - FFSIGN(sample) * (cbrt(FFABS(sample)) * (height/2) / cbrt(INT16_MAX));
198}
199
200static int get_cbrt_h2(int16_t sample, int height)
201{
202 return cbrt(FFABS(sample)) * height / cbrt(INT16_MAX);
203}
204
205static void draw_sample_point_rgba(uint8_t *buf, int height, int linesize,
206 int16_t *prev_y,
207 const uint8_t color[4], int h)
208{
209 if (h >= 0 && h < height) {
210 buf[h * linesize + 0] += color[0];
211 buf[h * linesize + 1] += color[1];
212 buf[h * linesize + 2] += color[2];
213 buf[h * linesize + 3] += color[3];
214 }
215}
216
217static void draw_sample_line_rgba(uint8_t *buf, int height, int linesize,
218 int16_t *prev_y,
219 const uint8_t color[4], int h)
220{
221 int k;
222 int start = height/2;
223 int end = av_clip(h, 0, height-1);
224 if (start > end)
225 FFSWAP(int16_t, start, end);
226 for (k = start; k < end; k++) {
227 buf[k * linesize + 0] += color[0];
228 buf[k * linesize + 1] += color[1];
229 buf[k * linesize + 2] += color[2];
230 buf[k * linesize + 3] += color[3];
231 }
232}
233
234static void draw_sample_p2p_rgba(uint8_t *buf, int height, int linesize,
235 int16_t *prev_y,
236 const uint8_t color[4], int h)
237{
238 int k;
239 if (h >= 0 && h < height) {
240 buf[h * linesize + 0] += color[0];
241 buf[h * linesize + 1] += color[1];
242 buf[h * linesize + 2] += color[2];
243 buf[h * linesize + 3] += color[3];
244 if (*prev_y && h != *prev_y) {
245 int start = *prev_y;
246 int end = av_clip(h, 0, height-1);
247 if (start > end)
248 FFSWAP(int16_t, start, end);
249 for (k = start + 1; k < end; k++) {
250 buf[k * linesize + 0] += color[0];
251 buf[k * linesize + 1] += color[1];
252 buf[k * linesize + 2] += color[2];
253 buf[k * linesize + 3] += color[3];
254 }
255 }
256 }
257 *prev_y = h;
258}
259
260static void draw_sample_cline_rgba(uint8_t *buf, int height, int linesize,
261 int16_t *prev_y,
262 const uint8_t color[4], int h)
263{
264 int k;
265 const int start = (height - h) / 2;
266 const int end = start + h;
267 for (k = start; k < end; k++) {
268 buf[k * linesize + 0] += color[0];
269 buf[k * linesize + 1] += color[1];
270 buf[k * linesize + 2] += color[2];
271 buf[k * linesize + 3] += color[3];
272 }
273}
274
275static void draw_sample_point_gray(uint8_t *buf, int height, int linesize,
276 int16_t *prev_y,
277 const uint8_t color[4], int h)
278{
279 if (h >= 0 && h < height)
280 buf[h * linesize] += color[0];
281}
282
283static void draw_sample_line_gray(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 int start = height/2;
289 int end = av_clip(h, 0, height-1);
290 if (start > end)
291 FFSWAP(int16_t, start, end);
292 for (k = start; k < end; k++)
293 buf[k * linesize] += color[0];
294}
295
296static void draw_sample_p2p_gray(uint8_t *buf, int height, int linesize,
297 int16_t *prev_y,
298 const uint8_t color[4], int h)
299{
300 int k;
301 if (h >= 0 && h < height) {
302 buf[h * linesize] += color[0];
303 if (*prev_y && h != *prev_y) {
304 int start = *prev_y;
305 int end = av_clip(h, 0, height-1);
306 if (start > end)
307 FFSWAP(int16_t, start, end);
308 for (k = start + 1; k < end; k++)
309 buf[k * linesize] += color[0];
310 }
311 }
312 *prev_y = h;
313}
314
315static void draw_sample_cline_gray(uint8_t *buf, int height, int linesize,
316 int16_t *prev_y,
317 const uint8_t color[4], int h)
318{
319 int k;
320 const int start = (height - h) / 2;
321 const int end = start + h;
322 for (k = start; k < end; k++)
323 buf[k * linesize] += color[0];
324}
325
326static int config_output(AVFilterLink *outlink)
327{
328 AVFilterContext *ctx = outlink->src;
329 AVFilterLink *inlink = ctx->inputs[0];
330 ShowWavesContext *showwaves = ctx->priv;
331 int nb_channels = inlink->channels;
332 char *colors, *saveptr = NULL;
333 uint8_t x;
334 int ch;
335
336 if (showwaves->single_pic)
337 showwaves->n = 1;
338
339 if (!showwaves->n)
340 showwaves->n = FFMAX(1, ((double)inlink->sample_rate / (showwaves->w * av_q2d(showwaves->rate))) + 0.5);
341
342 showwaves->buf_idx = 0;
343 if (!(showwaves->buf_idy = av_mallocz_array(nb_channels, sizeof(*showwaves->buf_idy)))) {
344 av_log(ctx, AV_LOG_ERROR, "Could not allocate showwaves buffer\n");
345 return AVERROR(ENOMEM);
346 }
347 outlink->w = showwaves->w;
348 outlink->h = showwaves->h;
349 outlink->sample_aspect_ratio = (AVRational){1,1};
350
351 outlink->frame_rate = av_div_q((AVRational){inlink->sample_rate,showwaves->n},
352 (AVRational){showwaves->w,1});
353
354 av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d r:%f n:%d\n",
355 showwaves->w, showwaves->h, av_q2d(outlink->frame_rate), showwaves->n);
356
357 switch (outlink->format) {
358 case AV_PIX_FMT_GRAY8:
359 switch (showwaves->mode) {
360 case MODE_POINT: showwaves->draw_sample = draw_sample_point_gray; break;
361 case MODE_LINE: showwaves->draw_sample = draw_sample_line_gray; break;
362 case MODE_P2P: showwaves->draw_sample = draw_sample_p2p_gray; break;
363 case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline_gray; break;
364 default:
365 return AVERROR_BUG;
366 }
367 showwaves->pixstep = 1;
368 break;
369 case AV_PIX_FMT_RGBA:
370 switch (showwaves->mode) {
371 case MODE_POINT: showwaves->draw_sample = draw_sample_point_rgba; break;
372 case MODE_LINE: showwaves->draw_sample = draw_sample_line_rgba; break;
373 case MODE_P2P: showwaves->draw_sample = draw_sample_p2p_rgba; break;
374 case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline_rgba; break;
375 default:
376 return AVERROR_BUG;
377 }
378 showwaves->pixstep = 4;
379 break;
380 }
381
382 switch (showwaves->scale) {
383 case SCALE_LIN:
384 switch (showwaves->mode) {
385 case MODE_POINT:
386 case MODE_LINE:
387 case MODE_P2P: showwaves->get_h = get_lin_h; break;
388 case MODE_CENTERED_LINE: showwaves->get_h = get_lin_h2; break;
389 default:
390 return AVERROR_BUG;
391 }
392 break;
393 case SCALE_LOG:
394 switch (showwaves->mode) {
395 case MODE_POINT:
396 case MODE_LINE:
397 case MODE_P2P: showwaves->get_h = get_log_h; break;
398 case MODE_CENTERED_LINE: showwaves->get_h = get_log_h2; break;
399 default:
400 return AVERROR_BUG;
401 }
402 break;
403 case SCALE_SQRT:
404 switch (showwaves->mode) {
405 case MODE_POINT:
406 case MODE_LINE:
407 case MODE_P2P: showwaves->get_h = get_sqrt_h; break;
408 case MODE_CENTERED_LINE: showwaves->get_h = get_sqrt_h2; break;
409 default:
410 return AVERROR_BUG;
411 }
412 break;
413 case SCALE_CBRT:
414 switch (showwaves->mode) {
415 case MODE_POINT:
416 case MODE_LINE:
417 case MODE_P2P: showwaves->get_h = get_cbrt_h; break;
418 case MODE_CENTERED_LINE: showwaves->get_h = get_cbrt_h2; break;
419 default:
420 return AVERROR_BUG;
421 }
422 break;
423 }
424
425 showwaves->fg = av_malloc_array(nb_channels, 4 * sizeof(*showwaves->fg));
426 if (!showwaves->fg)
427 return AVERROR(ENOMEM);
428
429 colors = av_strdup(showwaves->colors);
430 if (!colors)
431 return AVERROR(ENOMEM);
432
433 /* multiplication factor, pre-computed to avoid in-loop divisions */
434 x = 255 / ((showwaves->split_channels ? 1 : nb_channels) * showwaves->n);
435 if (outlink->format == AV_PIX_FMT_RGBA) {
436 uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
437
438 for (ch = 0; ch < nb_channels; ch++) {
439 char *color;
440
441 color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
442 if (color)
443 av_parse_color(fg, color, -1, ctx);
444 showwaves->fg[4*ch + 0] = fg[0] * x / 255.;
445 showwaves->fg[4*ch + 1] = fg[1] * x / 255.;
446 showwaves->fg[4*ch + 2] = fg[2] * x / 255.;
447 showwaves->fg[4*ch + 3] = fg[3] * x / 255.;
448 }
449 } else {
450 for (ch = 0; ch < nb_channels; ch++)
451 showwaves->fg[4 * ch + 0] = x;
452 }
453 av_free(colors);
454
455 return 0;
456}
457
458inline static int push_frame(AVFilterLink *outlink)
459{
460 AVFilterContext *ctx = outlink->src;
461 AVFilterLink *inlink = ctx->inputs[0];
462 ShowWavesContext *showwaves = outlink->src->priv;
463 int nb_channels = inlink->channels;
464 int ret, i;
465
466 ret = ff_filter_frame(outlink, showwaves->outpicref);
467 showwaves->outpicref = NULL;
468 showwaves->buf_idx = 0;
469 for (i = 0; i < nb_channels; i++)
470 showwaves->buf_idy[i] = 0;
471 return ret;
472}
473
474static int push_single_pic(AVFilterLink *outlink)
475{
476 AVFilterContext *ctx = outlink->src;
477 AVFilterLink *inlink = ctx->inputs[0];
478 ShowWavesContext *showwaves = ctx->priv;
479 int64_t n = 0, max_samples = showwaves->total_samples / outlink->w;
480 AVFrame *out = showwaves->outpicref;
481 struct frame_node *node;
482 const int nb_channels = inlink->channels;
483 const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
484 const int linesize = out->linesize[0];
485 const int pixstep = showwaves->pixstep;
486 int col = 0;
487 int64_t *sum = showwaves->sum;
488
489 if (max_samples == 0) {
490 av_log(ctx, AV_LOG_ERROR, "Too few samples\n");
491 return AVERROR(EINVAL);
492 }
493
494 av_log(ctx, AV_LOG_DEBUG, "Create frame averaging %"PRId64" samples per column\n", max_samples);
495
496 memset(sum, 0, nb_channels);
497
498 for (node = showwaves->audio_frames; node; node = node->next) {
499 int i;
500 const AVFrame *frame = node->frame;
501 const int16_t *p = (const int16_t *)frame->data[0];
502
503 for (i = 0; i < frame->nb_samples; i++) {
504 int ch;
505
506 for (ch = 0; ch < nb_channels; ch++)
507 sum[ch] += abs(p[ch + i*nb_channels]) << 1;
508 if (n++ == max_samples) {
509 for (ch = 0; ch < nb_channels; ch++) {
510 int16_t sample = sum[ch] / max_samples;
511 uint8_t *buf = out->data[0] + col * pixstep;
512 int h;
513
514 if (showwaves->split_channels)
515 buf += ch*ch_height*linesize;
516 av_assert0(col < outlink->w);
517 h = showwaves->get_h(sample, ch_height);
518 showwaves->draw_sample(buf, ch_height, linesize, &showwaves->buf_idy[ch], &showwaves->fg[ch * 4], h);
519 sum[ch] = 0;
520 }
521 col++;
522 n = 0;
523 }
524 }
525 }
526
527 return push_frame(outlink);
528}
529
530
531static int request_frame(AVFilterLink *outlink)
532{
533 ShowWavesContext *showwaves = outlink->src->priv;
534 AVFilterLink *inlink = outlink->src->inputs[0];
535 int ret;
536
537 ret = ff_request_frame(inlink);
538 if (ret == AVERROR_EOF && showwaves->outpicref) {
539 if (showwaves->single_pic)
540 push_single_pic(outlink);
541 else
542 push_frame(outlink);
543 }
544
545 return ret;
546}
547
548static int alloc_out_frame(ShowWavesContext *showwaves, const int16_t *p,
549 const AVFilterLink *inlink, AVFilterLink *outlink,
550 const AVFrame *in)
551{
552 if (!showwaves->outpicref) {
553 int j;
554 AVFrame *out = showwaves->outpicref =
555 ff_get_video_buffer(outlink, outlink->w, outlink->h);
556 if (!out)
557 return AVERROR(ENOMEM);
558 out->width = outlink->w;
559 out->height = outlink->h;
560 out->pts = in->pts + av_rescale_q((p - (int16_t *)in->data[0]) / inlink->channels,
561 av_make_q(1, inlink->sample_rate),
562 outlink->time_base);
563 for (j = 0; j < outlink->h; j++)
564 memset(out->data[0] + j*out->linesize[0], 0, outlink->w * showwaves->pixstep);
565 }
566 return 0;
567}
568
569static av_cold int init(AVFilterContext *ctx)
570{
571 ShowWavesContext *showwaves = ctx->priv;
572
573 if (!strcmp(ctx->filter->name, "showwavespic")) {
574 showwaves->single_pic = 1;
575 showwaves->mode = MODE_CENTERED_LINE;
576 }
577
578 return 0;
579}
580
581#if CONFIG_SHOWWAVES_FILTER
582
583static int showwaves_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
584{
585 AVFilterContext *ctx = inlink->dst;
586 AVFilterLink *outlink = ctx->outputs[0];
587 ShowWavesContext *showwaves = ctx->priv;
588 const int nb_samples = insamples->nb_samples;
589 AVFrame *outpicref = showwaves->outpicref;
590 int16_t *p = (int16_t *)insamples->data[0];
591 int nb_channels = inlink->channels;
592 int i, j, ret = 0;
593 const int pixstep = showwaves->pixstep;
594 const int n = showwaves->n;
595 const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
596
597 /* draw data in the buffer */
598 for (i = 0; i < nb_samples; i++) {
599
600 ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
601 if (ret < 0)
602 goto end;
603 outpicref = showwaves->outpicref;
604
605 for (j = 0; j < nb_channels; j++) {
606 uint8_t *buf = outpicref->data[0] + showwaves->buf_idx * pixstep;
607 const int linesize = outpicref->linesize[0];
608 int h;
609
610 if (showwaves->split_channels)
611 buf += j*ch_height*linesize;
612 h = showwaves->get_h(*p++, ch_height);
613 showwaves->draw_sample(buf, ch_height, linesize,
614 &showwaves->buf_idy[j], &showwaves->fg[j * 4], h);
615 }
616
617 showwaves->sample_count_mod++;
618 if (showwaves->sample_count_mod == n) {
619 showwaves->sample_count_mod = 0;
620 showwaves->buf_idx++;
621 }
622 if (showwaves->buf_idx == showwaves->w)
623 if ((ret = push_frame(outlink)) < 0)
624 break;
625 outpicref = showwaves->outpicref;
626 }
627
628end:
629 av_frame_free(&insamples);
630 return ret;
631}
632
633static const AVFilterPad showwaves_inputs[] = {
634 {
635 .name = "default",
636 .type = AVMEDIA_TYPE_AUDIO,
637 .filter_frame = showwaves_filter_frame,
638 },
639 { NULL }
640};
641
642static const AVFilterPad showwaves_outputs[] = {
643 {
644 .name = "default",
645 .type = AVMEDIA_TYPE_VIDEO,
646 .config_props = config_output,
647 .request_frame = request_frame,
648 },
649 { NULL }
650};
651
652AVFilter ff_avf_showwaves = {
653 .name = "showwaves",
654 .description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output."),
655 .init = init,
656 .uninit = uninit,
657 .query_formats = query_formats,
658 .priv_size = sizeof(ShowWavesContext),
659 .inputs = showwaves_inputs,
660 .outputs = showwaves_outputs,
661 .priv_class = &showwaves_class,
662};
663
664#endif // CONFIG_SHOWWAVES_FILTER
665
666#if CONFIG_SHOWWAVESPIC_FILTER
667
668#define OFFSET(x) offsetof(ShowWavesContext, x)
669#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
670
671static const AVOption showwavespic_options[] = {
672 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
673 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
674 { "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
675 { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
676 { "scale", "set amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, SCALE_NB-1, FLAGS, .unit="scale" },
677 { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LIN}, .flags=FLAGS, .unit="scale"},
678 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LOG}, .flags=FLAGS, .unit="scale"},
679 { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_SQRT}, .flags=FLAGS, .unit="scale"},
680 { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_CBRT}, .flags=FLAGS, .unit="scale"},
681 { NULL }
682};
683
684AVFILTER_DEFINE_CLASS(showwavespic);
685
686static int showwavespic_config_input(AVFilterLink *inlink)
687{
688 AVFilterContext *ctx = inlink->dst;
689 ShowWavesContext *showwaves = ctx->priv;
690
691 if (showwaves->single_pic) {
692 showwaves->sum = av_mallocz_array(inlink->channels, sizeof(*showwaves->sum));
693 if (!showwaves->sum)
694 return AVERROR(ENOMEM);
695 }
696
697 return 0;
698}
699
700static int showwavespic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
701{
702 AVFilterContext *ctx = inlink->dst;
703 AVFilterLink *outlink = ctx->outputs[0];
704 ShowWavesContext *showwaves = ctx->priv;
705 int16_t *p = (int16_t *)insamples->data[0];
706 int ret = 0;
707
708 if (showwaves->single_pic) {
709 struct frame_node *f;
710
711 ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
712 if (ret < 0)
713 goto end;
714
715 /* queue the audio frame */
716 f = av_malloc(sizeof(*f));
717 if (!f) {
718 ret = AVERROR(ENOMEM);
719 goto end;
720 }
721 f->frame = insamples;
722 f->next = NULL;
723 if (!showwaves->last_frame) {
724 showwaves->audio_frames =
725 showwaves->last_frame = f;
726 } else {
727 showwaves->last_frame->next = f;
728 showwaves->last_frame = f;
729 }
730 showwaves->total_samples += insamples->nb_samples;
731
732 return 0;
733 }
734
735end:
736 av_frame_free(&insamples);
737 return ret;
738}
739
740static const AVFilterPad showwavespic_inputs[] = {
741 {
742 .name = "default",
743 .type = AVMEDIA_TYPE_AUDIO,
744 .config_props = showwavespic_config_input,
745 .filter_frame = showwavespic_filter_frame,
746 },
747 { NULL }
748};
749
750static const AVFilterPad showwavespic_outputs[] = {
751 {
752 .name = "default",
753 .type = AVMEDIA_TYPE_VIDEO,
754 .config_props = config_output,
755 .request_frame = request_frame,
756 },
757 { NULL }
758};
759
760AVFilter ff_avf_showwavespic = {
761 .name = "showwavespic",
762 .description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output single picture."),
763 .init = init,
764 .uninit = uninit,
765 .query_formats = query_formats,
766 .priv_size = sizeof(ShowWavesContext),
767 .inputs = showwavespic_inputs,
768 .outputs = showwavespic_outputs,
769 .priv_class = &showwavespic_class,
770};
771
772#endif // CONFIG_SHOWWAVESPIC_FILTER
773
generated by cgit at 2024-05-17 04:47:42 (GMT)