FFmpeg coverage

Line	Branch	Exec	Source
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/channel_layout.h"
22			#include "libavutil/eval.h"
23			#include "libavutil/intreadwrite.h"
24			#include "libavutil/mem.h"
25			#include "libavutil/opt.h"
26			#include "libavutil/xga_font_data.h"
27			#include "avfilter.h"
28			#include "filters.h"
29			#include "formats.h"
30			#include "video.h"
31			#include "internal.h"
32
33			static const char *const var_names[] = { "VOLUME", "CHANNEL", "PEAK", NULL };
34			enum { VAR_VOLUME, VAR_CHANNEL, VAR_PEAK, VAR_VARS_NB };
35			enum DisplayScale { LINEAR, LOG, NB_DISPLAY_SCALE };
36
37			typedef struct ShowVolumeContext {
38			const AVClass *class;
39			int w, h;
40			int b;
41			double f;
42			AVRational frame_rate;
43			char *color;
44			int orientation;
45			int step;
46			float bgopacity;
47			int mode;
48
49			int nb_samples;
50			AVFrame *out;
51			AVExpr *c_expr;
52			int draw_text;
53			int draw_volume;
54			double *values;
55			uint32_t *color_lut;
56			float *max;
57			int display_scale;
58
59			double draw_persistent_duration; /* in second */
60			uint8_t persistant_max_rgba[4];
61			int persistent_max_frames; /* number of frames to check max value */
62			float *max_persistent; /* max value for draw_persistent_max for each channel */
63			int *nb_frames_max_display; /* number of frame for each channel, for displaying the max value */
64
65			void (*meter)(float *src, int nb_samples, float *max);
66			} ShowVolumeContext;
67
68			#define OFFSET(x) offsetof(ShowVolumeContext, x)
69			#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
70
71			static const AVOption showvolume_options[] = {
72			{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
73			{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
74			{ "b", "set border width", OFFSET(b), AV_OPT_TYPE_INT, {.i64=1}, 0, 5, FLAGS },
75			{ "w", "set channel width", OFFSET(w), AV_OPT_TYPE_INT, {.i64=400}, 80, 8192, FLAGS },
76			{ "h", "set channel height", OFFSET(h), AV_OPT_TYPE_INT, {.i64=20}, 1, 900, FLAGS },
77			{ "f", "set fade", OFFSET(f), AV_OPT_TYPE_DOUBLE, {.dbl=0.95}, 0, 1, FLAGS },
78			{ "c", "set volume color expression", OFFSET(color), AV_OPT_TYPE_STRING, {.str="PEAK*255+floor((1-PEAK)*255)*256+0xff000000"}, 0, 0, FLAGS },
79			{ "t", "display channel names", OFFSET(draw_text), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
80			{ "v", "display volume value", OFFSET(draw_volume), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
81			{ "dm", "duration for max value display", OFFSET(draw_persistent_duration), AV_OPT_TYPE_DOUBLE, {.dbl=0.}, 0, 9000, FLAGS},
82			{ "dmc","set color of the max value line", OFFSET(persistant_max_rgba), AV_OPT_TYPE_COLOR, {.str = "orange"}, 0, 0, FLAGS },
83			{ "o", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "orientation" },
84			{ "h", "horizontal", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "orientation" },
85			{ "v", "vertical", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "orientation" },
86			{ "s", "set step size", OFFSET(step), AV_OPT_TYPE_INT, {.i64=0}, 0, 5, FLAGS },
87			{ "p", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, FLAGS },
88			{ "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "mode" },
89			{ "p", "peak", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "mode" },
90			{ "r", "rms", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "mode" },
91			{ "ds", "set display scale", OFFSET(display_scale), AV_OPT_TYPE_INT, {.i64=LINEAR}, LINEAR, NB_DISPLAY_SCALE - 1, FLAGS, .unit = "display_scale" },
92			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, .unit = "display_scale" },
93			{ "log", "log", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, .unit = "display_scale" },
94			{ NULL }
95			};
96
97			AVFILTER_DEFINE_CLASS(showvolume);
98
99		✗	static av_cold int init(AVFilterContext *ctx)
100			{
101		✗	ShowVolumeContext *s = ctx->priv;
102			int ret;
103
104		✗	if (s->color) {
105		✗	ret = av_expr_parse(&s->c_expr, s->color, var_names,
106			NULL, NULL, NULL, NULL, 0, ctx);
107		✗	if (ret < 0)
108		✗	return ret;
109			}
110
111		✗	return 0;
112			}
113
114		✗	static int query_formats(AVFilterContext *ctx)
115			{
116		✗	AVFilterFormats *formats = NULL;
117		✗	AVFilterChannelLayouts *layouts = NULL;
118		✗	AVFilterLink *inlink = ctx->inputs[0];
119		✗	AVFilterLink *outlink = ctx->outputs[0];
120			static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
121			static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
122			int ret;
123
124		✗	formats = ff_make_format_list(sample_fmts);
125		✗	if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
126		✗	return ret;
127
128		✗	layouts = ff_all_channel_counts();
129		✗	if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
130		✗	return ret;
131
132		✗	formats = ff_all_samplerates();
133		✗	if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
134		✗	return ret;
135
136		✗	formats = ff_make_format_list(pix_fmts);
137		✗	if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
138		✗	return ret;
139
140		✗	return 0;
141			}
142
143		✗	static void find_peak(float *src, int nb_samples, float *peak)
144			{
145		✗	float max = 0.f;
146
147		✗	max = 0;
148		✗	for (int i = 0; i < nb_samples; i++)
149		✗	max = fmaxf(max, fabsf(src[i]));
150		✗	*peak = max;
151		✗	}
152
153		✗	static void find_rms(float *src, int nb_samples, float *rms)
154			{
155		✗	float sum = 0.f;
156
157		✗	for (int i = 0; i < nb_samples; i++)
158		✗	sum += src[i] * src[i];
159		✗	*rms = sqrtf(sum / nb_samples);
160		✗	}
161
162		✗	static int config_input(AVFilterLink *inlink)
163			{
164		✗	AVFilterContext *ctx = inlink->dst;
165		✗	ShowVolumeContext *s = ctx->priv;
166
167		✗	s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
168		✗	s->values = av_calloc(inlink->ch_layout.nb_channels * VAR_VARS_NB, sizeof(double));
169		✗	if (!s->values)
170		✗	return AVERROR(ENOMEM);
171
172		✗	s->color_lut = av_calloc(s->w, sizeof(*s->color_lut) * inlink->ch_layout.nb_channels);
173		✗	if (!s->color_lut)
174		✗	return AVERROR(ENOMEM);
175
176		✗	s->max = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->max));
177		✗	if (!s->max)
178		✗	return AVERROR(ENOMEM);
179
180		✗	switch (s->mode) {
181		✗	case 0: s->meter = find_peak; break;
182		✗	case 1: s->meter = find_rms; break;
183		✗	default: return AVERROR_BUG;
184			}
185
186		✗	if (s->draw_persistent_duration > 0.) {
187		✗	s->persistent_max_frames = (int) FFMAX(av_q2d(s->frame_rate) * s->draw_persistent_duration, 1.);
188		✗	s->max_persistent = av_calloc(inlink->ch_layout.nb_channels * s->persistent_max_frames, sizeof(*s->max_persistent));
189		✗	s->nb_frames_max_display = av_calloc(inlink->ch_layout.nb_channels * s->persistent_max_frames, sizeof(*s->nb_frames_max_display));
190		✗	if (!s->max_persistent ||
191		✗	!s->nb_frames_max_display)
192		✗	return AVERROR(ENOMEM);
193			}
194		✗	return 0;
195			}
196
197		✗	static int config_output(AVFilterLink *outlink)
198			{
199		✗	ShowVolumeContext *s = outlink->src->priv;
200		✗	AVFilterLink *inlink = outlink->src->inputs[0];
201			int ch;
202
203		✗	if (s->orientation) {
204		✗	outlink->h = s->w;
205		✗	outlink->w = s->h * inlink->ch_layout.nb_channels + (inlink->ch_layout.nb_channels - 1) * s->b;
206			} else {
207		✗	outlink->w = s->w;
208		✗	outlink->h = s->h * inlink->ch_layout.nb_channels + (inlink->ch_layout.nb_channels - 1) * s->b;
209			}
210
211		✗	outlink->sample_aspect_ratio = (AVRational){1,1};
212		✗	outlink->frame_rate = s->frame_rate;
213		✗	outlink->time_base = av_inv_q(outlink->frame_rate);
214
215		✗	for (ch = 0; ch < inlink->ch_layout.nb_channels; ch++) {
216			int i;
217
218		✗	for (i = 0; i < s->w; i++) {
219		✗	float max = i / (float)(s->w - 1);
220
221		✗	s->values[ch * VAR_VARS_NB + VAR_PEAK] = max;
222		✗	s->values[ch * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
223		✗	s->values[ch * VAR_VARS_NB + VAR_CHANNEL] = ch;
224		✗	s->color_lut[ch * s->w + i] = av_expr_eval(s->c_expr, &s->values[ch * VAR_VARS_NB], NULL);
225			}
226			}
227
228		✗	return 0;
229			}
230
231		✗	static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
232			{
233			const uint8_t *font;
234			int font_height;
235			int i;
236
237		✗	font = avpriv_cga_font, font_height = 8;
238
239		✗	for (i = 0; txt[i]; i++) {
240			int char_y, mask;
241
242		✗	if (o) { /* vertical orientation */
243		✗	for (char_y = font_height - 1; char_y >= 0; char_y--) {
244		✗	uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x * 4;
245		✗	for (mask = 0x80; mask; mask >>= 1) {
246		✗	if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
247		✗	AV_WN32(&p[char_y * 4], ~AV_RN32(&p[char_y * 4]));
248		✗	p += pic->linesize[0];
249			}
250			}
251			} else { /* horizontal orientation */
252		✗	uint8_t *p = pic->data[0] + y * pic->linesize[0] + (x + i * 8) * 4;
253		✗	for (char_y = 0; char_y < font_height; char_y++) {
254		✗	for (mask = 0x80; mask; mask >>= 1) {
255		✗	if (font[txt[i] * font_height + char_y] & mask)
256		✗	AV_WN32(p, ~AV_RN32(p));
257		✗	p += 4;
258			}
259		✗	p += pic->linesize[0] - 8 * 4;
260			}
261			}
262			}
263		✗	}
264
265		✗	static void clear_picture(ShowVolumeContext *s, AVFilterLink *outlink)
266			{
267			int i, j;
268		✗	const uint32_t bg = (uint32_t)(s->bgopacity * 255) << 24;
269
270		✗	for (i = 0; i < outlink->h; i++) {
271		✗	uint32_t *dst = (uint32_t *)(s->out->data[0] + i * s->out->linesize[0]);
272		✗	for (j = 0; j < outlink->w; j++)
273		✗	AV_WN32A(dst + j, bg);
274			}
275		✗	}
276
277		✗	static inline int calc_max_draw(ShowVolumeContext *s, AVFilterLink *outlink, float max)
278			{
279			float max_val;
280		✗	if (s->display_scale == LINEAR) {
281		✗	max_val = max;
282			} else { /* log */
283		✗	max_val = av_clipf(0.21 * log10(max) + 1, 0, 1);
284			}
285		✗	if (s->orientation) { /* vertical */
286		✗	return outlink->h - outlink->h * max_val;
287			} else { /* horizontal */
288		✗	return s->w * max_val;
289			}
290			}
291
292		✗	static inline void calc_persistent_max(ShowVolumeContext *s, float max, int channel)
293			{
294			/* update max value for persistent max display */
295		✗	if ((max >= s->max_persistent[channel]) || (s->nb_frames_max_display[channel] >= s->persistent_max_frames)) { /* update max value for display */
296		✗	s->max_persistent[channel] = max;
297		✗	s->nb_frames_max_display[channel] = 0;
298			} else {
299		✗	s->nb_frames_max_display[channel] += 1; /* incremente display frame count */
300			}
301		✗	}
302
303		✗	static inline void draw_max_line(ShowVolumeContext *s, int max_draw, int channel)
304			{
305			int k;
306		✗	if (s->orientation) { /* vertical */
307		✗	uint8_t *dst = s->out->data[0] + max_draw * s->out->linesize[0] + channel * (s->b + s->h) * 4;
308		✗	for (k = 0; k < s->h; k++) {
309		✗	memcpy(dst + k * 4, s->persistant_max_rgba, sizeof(s->persistant_max_rgba));
310			}
311			} else { /* horizontal */
312		✗	for (k = 0; k < s->h; k++) {
313		✗	uint8_t *dst = s->out->data[0] + (channel * s->h + channel * s->b + k) * s->out->linesize[0];
314		✗	memcpy(dst + max_draw * 4, s->persistant_max_rgba, sizeof(s->persistant_max_rgba));
315			}
316			}
317		✗	}
318
319		✗	static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
320			{
321		✗	AVFilterContext *ctx = inlink->dst;
322		✗	AVFilterLink *outlink = ctx->outputs[0];
323		✗	ShowVolumeContext *s = ctx->priv;
324		✗	const int step = s->step;
325			int c, j, k, max_draw, ret;
326			char channel_name[64];
327			AVFrame *out;
328
329		✗	if (!s->out || s->out->width != outlink->w ||
330		✗	s->out->height != outlink->h) {
331		✗	av_frame_free(&s->out);
332		✗	s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
333		✗	if (!s->out) {
334		✗	av_frame_free(&insamples);
335		✗	return AVERROR(ENOMEM);
336			}
337		✗	clear_picture(s, outlink);
338			}
339		✗	s->out->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
340		✗	s->out->duration = 1;
341
342		✗	if ((s->f < 1.) && (s->f > 0.)) {
343		✗	for (j = 0; j < outlink->h; j++) {
344		✗	uint8_t *dst = s->out->data[0] + j * s->out->linesize[0];
345		✗	const uint32_t alpha = s->bgopacity * 255;
346
347		✗	for (k = 0; k < outlink->w; k++) {
348		✗	dst[k * 4 + 0] = FFMAX(dst[k * 4 + 0] * s->f, 0);
349		✗	dst[k * 4 + 1] = FFMAX(dst[k * 4 + 1] * s->f, 0);
350		✗	dst[k * 4 + 2] = FFMAX(dst[k * 4 + 2] * s->f, 0);
351		✗	dst[k * 4 + 3] = FFMAX(dst[k * 4 + 3] * s->f, alpha);
352			}
353			}
354		✗	} else if (s->f == 0.) {
355		✗	clear_picture(s, outlink);
356			}
357
358		✗	if (s->orientation) { /* vertical */
359		✗	for (c = 0; c < inlink->ch_layout.nb_channels; c++) {
360		✗	float *src = (float *)insamples->extended_data[c];
361		✗	uint32_t *lut = s->color_lut + s->w * c;
362			float max;
363
364		✗	s->meter(src, insamples->nb_samples, &s->max[c]);
365		✗	max = s->max[c];
366
367		✗	s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
368		✗	max = av_clipf(max, 0, 1);
369		✗	max_draw = calc_max_draw(s, outlink, max);
370
371		✗	for (j = s->w - 1; j >= max_draw; j--) {
372		✗	uint8_t *dst = s->out->data[0] + j * s->out->linesize[0] + c * (s->b + s->h) * 4;
373		✗	for (k = 0; k < s->h; k++) {
374		✗	AV_WN32A(&dst[k * 4], lut[s->w - j - 1]);
375			}
376		✗	if (j & step)
377		✗	j -= step;
378			}
379
380		✗	if (s->draw_persistent_duration > 0.) {
381		✗	calc_persistent_max(s, max, c);
382		✗	max_draw = FFMAX(0, calc_max_draw(s, outlink, s->max_persistent[c]) - 1);
383		✗	draw_max_line(s, max_draw, c);
384			}
385			}
386			} else { /* horizontal */
387		✗	for (c = 0; c < inlink->ch_layout.nb_channels; c++) {
388		✗	float *src = (float *)insamples->extended_data[c];
389		✗	uint32_t *lut = s->color_lut + s->w * c;
390			float max;
391
392		✗	s->meter(src, insamples->nb_samples, &s->max[c]);
393		✗	max = s->max[c];
394
395		✗	s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
396		✗	max = av_clipf(max, 0, 1);
397		✗	max_draw = calc_max_draw(s, outlink, max);
398
399		✗	for (j = 0; j < s->h; j++) {
400		✗	uint8_t *dst = s->out->data[0] + (c * s->h + c * s->b + j) * s->out->linesize[0];
401
402		✗	for (k = 0; k < max_draw; k++) {
403		✗	AV_WN32A(dst + k * 4, lut[k]);
404		✗	if (k & step)
405		✗	k += step;
406			}
407			}
408
409		✗	if (s->draw_persistent_duration > 0.) {
410		✗	calc_persistent_max(s, max, c);
411		✗	max_draw = FFMAX(0, calc_max_draw(s, outlink, s->max_persistent[c]) - 1);
412		✗	draw_max_line(s, max_draw, c);
413			}
414			}
415			}
416
417		✗	av_frame_free(&insamples);
418		✗	out = av_frame_clone(s->out);
419		✗	if (!out)
420		✗	return AVERROR(ENOMEM);
421		✗	ret = ff_inlink_make_frame_writable(outlink, &out);
422		✗	if (ret < 0) {
423		✗	av_frame_free(&out);
424		✗	return ret;
425			}
426
427			/* draw channel names */
428		✗	for (c = 0; c < inlink->ch_layout.nb_channels && s->h >= 10 && s->draw_text; c++) {
429		✗	if (s->orientation) { /* vertical */
430		✗	int ret = av_channel_name(channel_name, sizeof(channel_name), av_channel_layout_channel_from_index(&inlink->ch_layout, c));
431		✗	if (ret < 0)
432		✗	continue;
433		✗	drawtext(out, c * (s->h + s->b) + (s->h - 10) / 2, outlink->h - 35, channel_name, 1);
434			} else { /* horizontal */
435		✗	int ret = av_channel_name(channel_name, sizeof(channel_name), av_channel_layout_channel_from_index(&inlink->ch_layout, c));
436		✗	if (ret < 0)
437		✗	continue;
438		✗	drawtext(out, 2, c * (s->h + s->b) + (s->h - 8) / 2, channel_name, 0);
439			}
440			}
441
442			/* draw volume level */
443		✗	for (c = 0; c < inlink->ch_layout.nb_channels && s->h >= 8 && s->draw_volume; c++) {
444			char buf[16];
445
446		✗	if (s->orientation) { /* vertical */
447		✗	snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]);
448		✗	drawtext(out, c * (s->h + s->b) + (s->h - 8) / 2, 2, buf, 1);
449			} else { /* horizontal */
450		✗	snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]);
451		✗	drawtext(out, FFMAX(0, s->w - 8 * (int)strlen(buf)), c * (s->h + s->b) + (s->h - 8) / 2, buf, 0);
452			}
453			}
454
455		✗	return ff_filter_frame(outlink, out);
456			}
457
458		✗	static int activate(AVFilterContext *ctx)
459			{
460		✗	AVFilterLink *inlink = ctx->inputs[0];
461		✗	AVFilterLink *outlink = ctx->outputs[0];
462		✗	ShowVolumeContext *s = ctx->priv;
463		✗	AVFrame *in = NULL;
464			int ret;
465
466		✗	FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
467
468		✗	ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
469		✗	if (ret < 0)
470		✗	return ret;
471		✗	if (ret > 0)
472		✗	return filter_frame(inlink, in);
473
474		✗	if (ff_inlink_queued_samples(inlink) >= s->nb_samples) {
475		✗	ff_filter_set_ready(ctx, 10);
476		✗	return 0;
477			}
478
479		✗	FF_FILTER_FORWARD_STATUS(inlink, outlink);
480		✗	FF_FILTER_FORWARD_WANTED(outlink, inlink);
481
482		✗	return FFERROR_NOT_READY;
483			}
484
485		✗	static av_cold void uninit(AVFilterContext *ctx)
486			{
487		✗	ShowVolumeContext *s = ctx->priv;
488
489		✗	av_frame_free(&s->out);
490		✗	av_expr_free(s->c_expr);
491		✗	av_freep(&s->values);
492		✗	av_freep(&s->color_lut);
493		✗	av_freep(&s->max);
494		✗	av_freep(&s->max_persistent);
495		✗	av_freep(&s->nb_frames_max_display);
496		✗	}
497
498			static const AVFilterPad showvolume_inputs[] = {
499			{
500			.name = "default",
501			.type = AVMEDIA_TYPE_AUDIO,
502			.config_props = config_input,
503			},
504			};
505
506			static const AVFilterPad showvolume_outputs[] = {
507			{
508			.name = "default",
509			.type = AVMEDIA_TYPE_VIDEO,
510			.config_props = config_output,
511			},
512			};
513
514			const AVFilter ff_avf_showvolume = {
515			.name = "showvolume",
516			.description = NULL_IF_CONFIG_SMALL("Convert input audio volume to video output."),
517			.init = init,
518			.activate = activate,
519			.uninit = uninit,
520			.priv_size = sizeof(ShowVolumeContext),
521			FILTER_INPUTS(showvolume_inputs),
522			FILTER_OUTPUTS(showvolume_outputs),
523			FILTER_QUERY_FUNC(query_formats),
524			.priv_class = &showvolume_class,
525			};
526