GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/avf_showfreqs.c Lines: 0 259 0.0 %
Date: 2020-10-23 17:01:47 Branches: 0 141 0.0 %

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 <float.h>
22
#include <math.h>
23
24
#include "libavcodec/avfft.h"
25
#include "libavutil/audio_fifo.h"
26
#include "libavutil/avassert.h"
27
#include "libavutil/avstring.h"
28
#include "libavutil/channel_layout.h"
29
#include "libavutil/intreadwrite.h"
30
#include "libavutil/opt.h"
31
#include "libavutil/parseutils.h"
32
#include "audio.h"
33
#include "filters.h"
34
#include "video.h"
35
#include "avfilter.h"
36
#include "internal.h"
37
#include "window_func.h"
38
39
enum DisplayMode    { LINE, BAR, DOT, NB_MODES };
40
enum ChannelMode    { COMBINED, SEPARATE, NB_CMODES };
41
enum FrequencyScale { FS_LINEAR, FS_LOG, FS_RLOG, NB_FSCALES };
42
enum AmplitudeScale { AS_LINEAR, AS_SQRT, AS_CBRT, AS_LOG, NB_ASCALES };
43
44
typedef struct ShowFreqsContext {
45
    const AVClass *class;
46
    int w, h;
47
    int mode;
48
    int cmode;
49
    int fft_size;
50
    int fft_bits;
51
    int ascale, fscale;
52
    int avg;
53
    int win_func;
54
    FFTContext *fft;
55
    FFTComplex **fft_data;
56
    float **avg_data;
57
    float *window_func_lut;
58
    float overlap;
59
    float minamp;
60
    int hop_size;
61
    int nb_channels;
62
    int nb_freq;
63
    int win_size;
64
    float scale;
65
    char *colors;
66
    AVAudioFifo *fifo;
67
    int64_t pts;
68
} ShowFreqsContext;
69
70
#define OFFSET(x) offsetof(ShowFreqsContext, x)
71
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
72
73
static const AVOption showfreqs_options[] = {
74
    { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "1024x512"}, 0, 0, FLAGS },
75
    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "1024x512"}, 0, 0, FLAGS },
76
    { "mode", "set display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=BAR}, 0, NB_MODES-1, FLAGS, "mode" },
77
        { "line", "show lines",  0, AV_OPT_TYPE_CONST, {.i64=LINE},   0, 0, FLAGS, "mode" },
78
        { "bar",  "show bars",   0, AV_OPT_TYPE_CONST, {.i64=BAR},    0, 0, FLAGS, "mode" },
79
        { "dot",  "show dots",   0, AV_OPT_TYPE_CONST, {.i64=DOT},    0, 0, FLAGS, "mode" },
80
    { "ascale", "set amplitude scale", OFFSET(ascale), AV_OPT_TYPE_INT, {.i64=AS_LOG}, 0, NB_ASCALES-1, FLAGS, "ascale" },
81
        { "lin",  "linear",      0, AV_OPT_TYPE_CONST, {.i64=AS_LINEAR}, 0, 0, FLAGS, "ascale" },
82
        { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=AS_SQRT},   0, 0, FLAGS, "ascale" },
83
        { "cbrt", "cubic root",  0, AV_OPT_TYPE_CONST, {.i64=AS_CBRT},   0, 0, FLAGS, "ascale" },
84
        { "log",  "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=AS_LOG},    0, 0, FLAGS, "ascale" },
85
    { "fscale", "set frequency scale", OFFSET(fscale), AV_OPT_TYPE_INT, {.i64=FS_LINEAR}, 0, NB_FSCALES-1, FLAGS, "fscale" },
86
        { "lin",  "linear",              0, AV_OPT_TYPE_CONST, {.i64=FS_LINEAR}, 0, 0, FLAGS, "fscale" },
87
        { "log",  "logarithmic",         0, AV_OPT_TYPE_CONST, {.i64=FS_LOG},    0, 0, FLAGS, "fscale" },
88
        { "rlog", "reverse logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=FS_RLOG},   0, 0, FLAGS, "fscale" },
89
    { "win_size", "set window size", OFFSET(fft_size), AV_OPT_TYPE_INT, {.i64=2048}, 16, 65536, FLAGS },
90
    { "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64=WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" },
91
        { "rect",     "Rectangular",      0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT},     0, 0, FLAGS, "win_func" },
92
        { "bartlett", "Bartlett",         0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" },
93
        { "hanning",  "Hanning",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING},  0, 0, FLAGS, "win_func" },
94
        { "hamming",  "Hamming",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING},  0, 0, FLAGS, "win_func" },
95
        { "blackman", "Blackman",         0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" },
96
        { "welch",    "Welch",            0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH},    0, 0, FLAGS, "win_func" },
97
        { "flattop",  "Flat-top",         0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP},  0, 0, FLAGS, "win_func" },
98
        { "bharris",  "Blackman-Harris",  0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS},  0, 0, FLAGS, "win_func" },
99
        { "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, FLAGS, "win_func" },
100
        { "bhann",    "Bartlett-Hann",    0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN},    0, 0, FLAGS, "win_func" },
101
        { "sine",     "Sine",             0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE},     0, 0, FLAGS, "win_func" },
102
        { "nuttall",  "Nuttall",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL},  0, 0, FLAGS, "win_func" },
103
        { "lanczos",  "Lanczos",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS},  0, 0, FLAGS, "win_func" },
104
        { "gauss",    "Gauss",            0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS},    0, 0, FLAGS, "win_func" },
105
        { "tukey",    "Tukey",            0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY},    0, 0, FLAGS, "win_func" },
106
        { "dolph",    "Dolph-Chebyshev",  0, AV_OPT_TYPE_CONST, {.i64=WFUNC_DOLPH},    0, 0, FLAGS, "win_func" },
107
        { "cauchy",   "Cauchy",           0, AV_OPT_TYPE_CONST, {.i64=WFUNC_CAUCHY},   0, 0, FLAGS, "win_func" },
108
        { "parzen",   "Parzen",           0, AV_OPT_TYPE_CONST, {.i64=WFUNC_PARZEN},   0, 0, FLAGS, "win_func" },
109
        { "poisson",  "Poisson",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_POISSON},  0, 0, FLAGS, "win_func" },
110
        { "bohman",   "Bohman",           0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BOHMAN} ,  0, 0, FLAGS, "win_func" },
111
    { "overlap",  "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=1.}, 0., 1., FLAGS },
112
    { "averaging", "set time averaging", OFFSET(avg), AV_OPT_TYPE_INT, {.i64=1}, 0, INT32_MAX, FLAGS },
113
    { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
114
    { "cmode", "set channel mode", OFFSET(cmode), AV_OPT_TYPE_INT, {.i64=COMBINED}, 0, NB_CMODES-1, FLAGS, "cmode" },
115
        { "combined", "show all channels in same window",  0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, "cmode" },
116
        { "separate", "show each channel in own window",   0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "cmode" },
117
    { "minamp",  "set minimum amplitude", OFFSET(minamp), AV_OPT_TYPE_FLOAT, {.dbl=1e-6}, FLT_MIN, 1e-6, FLAGS },
118
    { NULL }
119
};
120
121
AVFILTER_DEFINE_CLASS(showfreqs);
122
123
static int query_formats(AVFilterContext *ctx)
124
{
125
    AVFilterFormats *formats = NULL;
126
    AVFilterChannelLayouts *layouts = NULL;
127
    AVFilterLink *inlink = ctx->inputs[0];
128
    AVFilterLink *outlink = ctx->outputs[0];
129
    static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
130
    static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
131
    int ret;
132
133
    /* set input audio formats */
134
    formats = ff_make_format_list(sample_fmts);
135
    if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
136
        return ret;
137
138
    layouts = ff_all_channel_layouts();
139
    if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
140
        return ret;
141
142
    formats = ff_all_samplerates();
143
    if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
144
        return ret;
145
146
    /* set output video format */
147
    formats = ff_make_format_list(pix_fmts);
148
    if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
149
        return ret;
150
151
    return 0;
152
}
153
154
static av_cold int init(AVFilterContext *ctx)
155
{
156
    ShowFreqsContext *s = ctx->priv;
157
158
    s->pts = AV_NOPTS_VALUE;
159
160
    return 0;
161
}
162
163
static int config_output(AVFilterLink *outlink)
164
{
165
    AVFilterContext *ctx = outlink->src;
166
    AVFilterLink *inlink = ctx->inputs[0];
167
    ShowFreqsContext *s = ctx->priv;
168
    float overlap;
169
    int i;
170
171
    s->fft_bits = av_log2(s->fft_size);
172
    s->nb_freq = 1 << (s->fft_bits - 1);
173
    s->win_size = s->nb_freq << 1;
174
    av_audio_fifo_free(s->fifo);
175
    av_fft_end(s->fft);
176
    s->fft = av_fft_init(s->fft_bits, 0);
177
    if (!s->fft) {
178
        av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
179
               "The window size might be too high.\n");
180
        return AVERROR(ENOMEM);
181
    }
182
183
    /* FFT buffers: x2 for each (display) channel buffer.
184
     * Note: we use free and malloc instead of a realloc-like function to
185
     * make sure the buffer is aligned in memory for the FFT functions. */
186
    for (i = 0; i < s->nb_channels; i++) {
187
        av_freep(&s->fft_data[i]);
188
        av_freep(&s->avg_data[i]);
189
    }
190
    av_freep(&s->fft_data);
191
    av_freep(&s->avg_data);
192
    s->nb_channels = inlink->channels;
193
194
    s->fft_data = av_calloc(s->nb_channels, sizeof(*s->fft_data));
195
    if (!s->fft_data)
196
        return AVERROR(ENOMEM);
197
    s->avg_data = av_calloc(s->nb_channels, sizeof(*s->avg_data));
198
    if (!s->avg_data)
199
        return AVERROR(ENOMEM);
200
    for (i = 0; i < s->nb_channels; i++) {
201
        s->fft_data[i] = av_calloc(s->win_size, sizeof(**s->fft_data));
202
        s->avg_data[i] = av_calloc(s->nb_freq, sizeof(**s->avg_data));
203
        if (!s->fft_data[i] || !s->avg_data[i])
204
            return AVERROR(ENOMEM);
205
    }
206
207
    /* pre-calc windowing function */
208
    s->window_func_lut = av_realloc_f(s->window_func_lut, s->win_size,
209
                                      sizeof(*s->window_func_lut));
210
    if (!s->window_func_lut)
211
        return AVERROR(ENOMEM);
212
    generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
213
    if (s->overlap == 1.)
214
        s->overlap = overlap;
215
    s->hop_size = (1. - s->overlap) * s->win_size;
216
    if (s->hop_size < 1) {
217
        av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap);
218
        return AVERROR(EINVAL);
219
    }
220
221
    for (s->scale = 0, i = 0; i < s->win_size; i++) {
222
        s->scale += s->window_func_lut[i] * s->window_func_lut[i];
223
    }
224
225
    outlink->frame_rate = av_make_q(inlink->sample_rate, s->win_size * (1.-s->overlap));
226
    outlink->sample_aspect_ratio = (AVRational){1,1};
227
    outlink->w = s->w;
228
    outlink->h = s->h;
229
230
    s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, s->win_size);
231
    if (!s->fifo)
232
        return AVERROR(ENOMEM);
233
    return 0;
234
}
235
236
static inline void draw_dot(AVFrame *out, int x, int y, uint8_t fg[4])
237
{
238
239
    uint32_t color = AV_RL32(out->data[0] + y * out->linesize[0] + x * 4);
240
241
    if ((color & 0xffffff) != 0)
242
        AV_WL32(out->data[0] + y * out->linesize[0] + x * 4, AV_RL32(fg) | color);
243
    else
244
        AV_WL32(out->data[0] + y * out->linesize[0] + x * 4, AV_RL32(fg));
245
}
246
247
static int get_sx(ShowFreqsContext *s, int f)
248
{
249
    switch (s->fscale) {
250
    case FS_LINEAR:
251
        return (s->w/(float)s->nb_freq)*f;
252
    case FS_LOG:
253
        return s->w-pow(s->w, (s->nb_freq-f-1)/(s->nb_freq-1.));
254
    case FS_RLOG:
255
        return pow(s->w, f/(s->nb_freq-1.));
256
    }
257
258
    return 0;
259
}
260
261
static float get_bsize(ShowFreqsContext *s, int f)
262
{
263
    switch (s->fscale) {
264
    case FS_LINEAR:
265
        return s->w/(float)s->nb_freq;
266
    case FS_LOG:
267
        return pow(s->w, (s->nb_freq-f-1)/(s->nb_freq-1.))-
268
               pow(s->w, (s->nb_freq-f-2)/(s->nb_freq-1.));
269
    case FS_RLOG:
270
        return pow(s->w, (f+1)/(s->nb_freq-1.))-
271
               pow(s->w,  f   /(s->nb_freq-1.));
272
    }
273
274
    return 1.;
275
}
276
277
static inline void plot_freq(ShowFreqsContext *s, int ch,
278
                             double a, int f, uint8_t fg[4], int *prev_y,
279
                             AVFrame *out, AVFilterLink *outlink)
280
{
281
    const int w = s->w;
282
    const float min = s->minamp;
283
    const float avg = s->avg_data[ch][f];
284
    const float bsize = get_bsize(s, f);
285
    const int sx = get_sx(s, f);
286
    int end = outlink->h;
287
    int x, y, i;
288
289
    switch(s->ascale) {
290
    case AS_SQRT:
291
        a = 1.0 - sqrt(a);
292
        break;
293
    case AS_CBRT:
294
        a = 1.0 - cbrt(a);
295
        break;
296
    case AS_LOG:
297
        a = log(av_clipd(a, min, 1)) / log(min);
298
        break;
299
    case AS_LINEAR:
300
        a = 1.0 - a;
301
        break;
302
    }
303
304
    switch (s->cmode) {
305
    case COMBINED:
306
        y = a * outlink->h - 1;
307
        break;
308
    case SEPARATE:
309
        end = (outlink->h / s->nb_channels) * (ch + 1);
310
        y = (outlink->h / s->nb_channels) * ch + a * (outlink->h / s->nb_channels) - 1;
311
        break;
312
    default:
313
        av_assert0(0);
314
    }
315
    if (y < 0)
316
        return;
317
318
    switch (s->avg) {
319
    case 0:
320
        y = s->avg_data[ch][f] = !outlink->frame_count_in ? y : FFMIN(avg, y);
321
        break;
322
    case 1:
323
        break;
324
    default:
325
        s->avg_data[ch][f] = avg + y * (y - avg) / (FFMIN(outlink->frame_count_in + 1, s->avg) * y);
326
        y = s->avg_data[ch][f];
327
        break;
328
    }
329
330
    switch(s->mode) {
331
    case LINE:
332
        if (*prev_y == -1) {
333
            *prev_y = y;
334
        }
335
        if (y <= *prev_y) {
336
            for (x = sx + 1; x < sx + bsize && x < w; x++)
337
                draw_dot(out, x, y, fg);
338
            for (i = y; i <= *prev_y; i++)
339
                draw_dot(out, sx, i, fg);
340
        } else {
341
            for (i = *prev_y; i <= y; i++)
342
                draw_dot(out, sx, i, fg);
343
            for (x = sx + 1; x < sx + bsize && x < w; x++)
344
                draw_dot(out, x, i - 1, fg);
345
        }
346
        *prev_y = y;
347
        break;
348
    case BAR:
349
        for (x = sx; x < sx + bsize && x < w; x++)
350
            for (i = y; i < end; i++)
351
                draw_dot(out, x, i, fg);
352
        break;
353
    case DOT:
354
        for (x = sx; x < sx + bsize && x < w; x++)
355
            draw_dot(out, x, y, fg);
356
        break;
357
    }
358
}
359
360
static int plot_freqs(AVFilterLink *inlink, AVFrame *in)
361
{
362
    AVFilterContext *ctx = inlink->dst;
363
    AVFilterLink *outlink = ctx->outputs[0];
364
    ShowFreqsContext *s = ctx->priv;
365
    const int win_size = s->win_size;
366
    char *colors, *color, *saveptr = NULL;
367
    AVFrame *out;
368
    int ch, n;
369
370
    out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
371
    if (!out)
372
        return AVERROR(ENOMEM);
373
374
    for (n = 0; n < outlink->h; n++)
375
        memset(out->data[0] + out->linesize[0] * n, 0, outlink->w * 4);
376
377
    /* fill FFT input with the number of samples available */
378
    for (ch = 0; ch < s->nb_channels; ch++) {
379
        const float *p = (float *)in->extended_data[ch];
380
381
        for (n = 0; n < in->nb_samples; n++) {
382
            s->fft_data[ch][n].re = p[n] * s->window_func_lut[n];
383
            s->fft_data[ch][n].im = 0;
384
        }
385
        for (; n < win_size; n++) {
386
            s->fft_data[ch][n].re = 0;
387
            s->fft_data[ch][n].im = 0;
388
        }
389
    }
390
391
    /* run FFT on each samples set */
392
    for (ch = 0; ch < s->nb_channels; ch++) {
393
        av_fft_permute(s->fft, s->fft_data[ch]);
394
        av_fft_calc(s->fft, s->fft_data[ch]);
395
    }
396
397
#define RE(x, ch) s->fft_data[ch][x].re
398
#define IM(x, ch) s->fft_data[ch][x].im
399
#define M(a, b) (sqrt((a) * (a) + (b) * (b)))
400
401
    colors = av_strdup(s->colors);
402
    if (!colors) {
403
        av_frame_free(&out);
404
        return AVERROR(ENOMEM);
405
    }
406
407
    for (ch = 0; ch < s->nb_channels; ch++) {
408
        uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
409
        int prev_y = -1, f;
410
        double a;
411
412
        color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
413
        if (color)
414
            av_parse_color(fg, color, -1, ctx);
415
416
        a = av_clipd(M(RE(0, ch), 0) / s->scale, 0, 1);
417
        plot_freq(s, ch, a, 0, fg, &prev_y, out, outlink);
418
419
        for (f = 1; f < s->nb_freq; f++) {
420
            a = av_clipd(M(RE(f, ch), IM(f, ch)) / s->scale, 0, 1);
421
422
            plot_freq(s, ch, a, f, fg, &prev_y, out, outlink);
423
        }
424
    }
425
426
    av_free(colors);
427
    out->pts = in->pts;
428
    out->sample_aspect_ratio = (AVRational){1,1};
429
    return ff_filter_frame(outlink, out);
430
}
431
432
static int filter_frame(AVFilterLink *inlink)
433
{
434
    AVFilterContext *ctx = inlink->dst;
435
    ShowFreqsContext *s = ctx->priv;
436
    AVFrame *fin = NULL;
437
    int ret = 0;
438
439
    fin = ff_get_audio_buffer(inlink, s->win_size);
440
    if (!fin) {
441
        ret = AVERROR(ENOMEM);
442
        goto fail;
443
    }
444
445
    fin->pts = s->pts;
446
    s->pts += s->hop_size;
447
    ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size);
448
    if (ret < 0)
449
        goto fail;
450
451
    ret = plot_freqs(inlink, fin);
452
    av_frame_free(&fin);
453
    av_audio_fifo_drain(s->fifo, s->hop_size);
454
455
fail:
456
    av_frame_free(&fin);
457
    return ret;
458
}
459
460
static int activate(AVFilterContext *ctx)
461
{
462
    AVFilterLink *inlink = ctx->inputs[0];
463
    AVFilterLink *outlink = ctx->outputs[0];
464
    ShowFreqsContext *s = ctx->priv;
465
    AVFrame *in = NULL;
466
    int ret = 0;
467
468
    FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
469
470
    if (av_audio_fifo_size(s->fifo) < s->win_size)
471
        ret = ff_inlink_consume_samples(inlink, s->win_size, s->win_size, &in);
472
    if (ret < 0)
473
        return ret;
474
    if (ret > 0) {
475
        av_audio_fifo_write(s->fifo, (void **)in->extended_data, in->nb_samples);
476
        if (s->pts == AV_NOPTS_VALUE)
477
            s->pts = in->pts;
478
        av_frame_free(&in);
479
    }
480
481
    if (av_audio_fifo_size(s->fifo) >= s->win_size) {
482
        ret = filter_frame(inlink);
483
        if (ret <= 0)
484
            return ret;
485
    }
486
487
    FF_FILTER_FORWARD_STATUS(inlink, outlink);
488
    FF_FILTER_FORWARD_WANTED(outlink, inlink);
489
490
    return FFERROR_NOT_READY;
491
}
492
493
static av_cold void uninit(AVFilterContext *ctx)
494
{
495
    ShowFreqsContext *s = ctx->priv;
496
    int i;
497
498
    av_fft_end(s->fft);
499
    for (i = 0; i < s->nb_channels; i++) {
500
        if (s->fft_data)
501
            av_freep(&s->fft_data[i]);
502
        if (s->avg_data)
503
            av_freep(&s->avg_data[i]);
504
    }
505
    av_freep(&s->fft_data);
506
    av_freep(&s->avg_data);
507
    av_freep(&s->window_func_lut);
508
    av_audio_fifo_free(s->fifo);
509
}
510
511
static const AVFilterPad showfreqs_inputs[] = {
512
    {
513
        .name         = "default",
514
        .type         = AVMEDIA_TYPE_AUDIO,
515
    },
516
    { NULL }
517
};
518
519
static const AVFilterPad showfreqs_outputs[] = {
520
    {
521
        .name          = "default",
522
        .type          = AVMEDIA_TYPE_VIDEO,
523
        .config_props  = config_output,
524
    },
525
    { NULL }
526
};
527
528
AVFilter ff_avf_showfreqs = {
529
    .name          = "showfreqs",
530
    .description   = NULL_IF_CONFIG_SMALL("Convert input audio to a frequencies video output."),
531
    .init          = init,
532
    .uninit        = uninit,
533
    .query_formats = query_formats,
534
    .priv_size     = sizeof(ShowFreqsContext),
535
    .activate      = activate,
536
    .inputs        = showfreqs_inputs,
537
    .outputs       = showfreqs_outputs,
538
    .priv_class    = &showfreqs_class,
539
};