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FFmpeg/libavfilter/avf_showcqt.c

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  1. /*

  2.  * Copyright (c) 2014-2015 Muhammad Faiz <mfcc64@gmail.com>

  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 "config.h"

  22. #include "libavcodec/avfft.h"

  23. #include "libavutil/avassert.h"

  24. #include "libavutil/opt.h"

  25. #include "libavutil/xga_font_data.h"

  26. #include "libavutil/eval.h"

  27. #include "libavutil/pixdesc.h"

  28. #include "avfilter.h"

  29. #include "internal.h"

  30. #include "lavfutils.h"

  31. #include "lswsutils.h"

  32. 

  33. #if CONFIG_LIBFREETYPE

  34. #include <ft2build.h>

  35. #include FT_FREETYPE_H

  36. #endif

  37. 

  38. #include "avf_showcqt.h"

  39. 

  40. #define BASEFREQ        20.01523126408007475

  41. #define ENDFREQ         20495.59681441799654

  42. #define TLENGTH         "384*tc/(384+tc*f)"

  43. #define TLENGTH_MIN     0.001

  44. #define VOLUME_MAX      100.0

  45. #define FONTCOLOR       "st(0, (midi(f)-59.5)/12);" \

  46.     "st(1, if(between(ld(0),0,1), 0.5-0.5*cos(2*PI*ld(0)), 0));" \

  47.     "r(1-ld(1)) + b(ld(1))"

  48. #define PTS_STEP 10

  49. #define PTS_TOLERANCE 1

  50. 

  51. #define OFFSET(x) offsetof(ShowCQTContext, x)

  52. #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM)

  53. 

  54. static const AVOption showcqt_options[] = {

  55.     { "size",         "set video size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, { .str = "1920x1080" },      0, 0,        FLAGS },

  56.     { "s",            "set video size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, { .str = "1920x1080" },      0, 0,        FLAGS },

  57.     { "fps",          "set video rate", OFFSET(rate),  AV_OPT_TYPE_VIDEO_RATE, { .str = "25" },             0, 0,        FLAGS },

  58.     { "rate",         "set video rate", OFFSET(rate),  AV_OPT_TYPE_VIDEO_RATE, { .str = "25" },             0, 0,        FLAGS },

  59.     { "r",            "set video rate", OFFSET(rate),  AV_OPT_TYPE_VIDEO_RATE, { .str = "25" },             0, 0,        FLAGS },

  60.     { "bar_h",   "set bargraph height", OFFSET(bar_h),        AV_OPT_TYPE_INT, { .i64 = -1 },              -1, INT_MAX,  FLAGS },

  61.     { "axis_h",      "set axis height", OFFSET(axis_h),       AV_OPT_TYPE_INT, { .i64 = -1 },              -1, INT_MAX,  FLAGS },

  62.     { "sono_h",  "set sonogram height", OFFSET(sono_h),       AV_OPT_TYPE_INT, { .i64 = -1 },              -1, INT_MAX,  FLAGS },

  63.     { "fullhd",      "set fullhd size", OFFSET(fullhd),      AV_OPT_TYPE_BOOL, { .i64 = 1 },                0, 1,        FLAGS },

  64.     { "sono_v",  "set sonogram volume", OFFSET(sono_v),    AV_OPT_TYPE_STRING, { .str = "16" },      CHAR_MIN, CHAR_MAX, FLAGS },

  65.     { "volume",  "set sonogram volume", OFFSET(sono_v),    AV_OPT_TYPE_STRING, { .str = "16" },      CHAR_MIN, CHAR_MAX, FLAGS },

  66.     { "bar_v",   "set bargraph volume", OFFSET(bar_v),     AV_OPT_TYPE_STRING, { .str = "sono_v" },  CHAR_MIN, CHAR_MAX, FLAGS },

  67.     { "volume2", "set bargraph volume", OFFSET(bar_v),     AV_OPT_TYPE_STRING, { .str = "sono_v" },  CHAR_MIN, CHAR_MAX, FLAGS },

  68.     { "sono_g",   "set sonogram gamma", OFFSET(sono_g),     AV_OPT_TYPE_FLOAT, { .dbl = 3.0 },            1.0, 7.0,      FLAGS },

  69.     { "gamma",    "set sonogram gamma", OFFSET(sono_g),     AV_OPT_TYPE_FLOAT, { .dbl = 3.0 },            1.0, 7.0,      FLAGS },

  70.     { "bar_g",    "set bargraph gamma", OFFSET(bar_g),      AV_OPT_TYPE_FLOAT, { .dbl = 1.0 },            1.0, 7.0,      FLAGS },

  71.     { "gamma2",   "set bargraph gamma", OFFSET(bar_g),      AV_OPT_TYPE_FLOAT, { .dbl = 1.0 },            1.0, 7.0,      FLAGS },

  72.     { "timeclamp",     "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 },           0.1, 1.0,      FLAGS },

  73.     { "tc",            "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 },           0.1, 1.0,      FLAGS },

  74.     { "basefreq", "set base frequency", OFFSET(basefreq),  AV_OPT_TYPE_DOUBLE, { .dbl = BASEFREQ },      10.0, 100000.0, FLAGS },

  75.     { "endfreq",   "set end frequency", OFFSET(endfreq),   AV_OPT_TYPE_DOUBLE, { .dbl = ENDFREQ },       10.0, 100000.0, FLAGS },

  76.     { "coeffclamp",   "set coeffclamp", OFFSET(coeffclamp), AV_OPT_TYPE_FLOAT, { .dbl = 1.0 },            0.1, 10.0,     FLAGS },

  77.     { "tlength",         "set tlength", OFFSET(tlength),   AV_OPT_TYPE_STRING, { .str = TLENGTH },   CHAR_MIN, CHAR_MAX, FLAGS },

  78.     { "count",   "set transform count", OFFSET(count),        AV_OPT_TYPE_INT, { .i64 = 6 },                1, 30,       FLAGS },

  79.     { "fcount",  "set frequency count", OFFSET(fcount),       AV_OPT_TYPE_INT, { .i64 = 0 },                0, 10,       FLAGS },

  80.     { "fontfile",      "set axis font", OFFSET(fontfile),  AV_OPT_TYPE_STRING, { .str = NULL },      CHAR_MIN, CHAR_MAX, FLAGS },

  81.     { "fontcolor",    "set font color", OFFSET(fontcolor), AV_OPT_TYPE_STRING, { .str = FONTCOLOR }, CHAR_MIN, CHAR_MAX, FLAGS },

  82.     { "axisfile",     "set axis image", OFFSET(axisfile),  AV_OPT_TYPE_STRING, { .str = NULL },      CHAR_MIN, CHAR_MAX, FLAGS },

  83.     { "axis",              "draw axis", OFFSET(axis),        AV_OPT_TYPE_BOOL, { .i64 = 1 },                0, 1,        FLAGS },

  84.     { "text",              "draw axis", OFFSET(axis),        AV_OPT_TYPE_BOOL, { .i64 = 1 },                0, 1,        FLAGS },

  85.     { NULL }

  86. };

  87. 

  88. AVFILTER_DEFINE_CLASS(showcqt);

  89. 

  90. static void common_uninit(ShowCQTContext *s)

  91. {

  92.     int k;

  93. 

  94.     /* axis_frame may be non reference counted frame */

  95.     if (s->axis_frame && !s->axis_frame->buf[0]) {

  96.         av_freep(s->axis_frame->data);

  97.         for (k = 0; k < 4; k++)

  98.             s->axis_frame->data[k] = NULL;

  99.     }

  100. 

  101.     av_frame_free(&s->axis_frame);

  102.     av_frame_free(&s->sono_frame);

  103.     av_fft_end(s->fft_ctx);

  104.     s->fft_ctx = NULL;

  105.     if (s->coeffs)

  106.         for (k = 0; k < s->cqt_len; k++)

  107.             av_freep(&s->coeffs[k].val);

  108.     av_freep(&s->coeffs);

  109.     av_freep(&s->fft_data);

  110.     av_freep(&s->fft_result);

  111.     av_freep(&s->cqt_result);

  112.     av_freep(&s->c_buf);

  113.     av_freep(&s->h_buf);

  114.     av_freep(&s->rcp_h_buf);

  115.     av_freep(&s->freq);

  116.     av_freep(&s->sono_v_buf);

  117.     av_freep(&s->bar_v_buf);

  118. }

  119. 

  120. static double *create_freq_table(double base, double end, int n)

  121. {

  122.     double log_base, log_end;

  123.     double rcp_n = 1.0 / n;

  124.     double *freq;

  125.     int x;

  126. 

  127.     freq = av_malloc_array(n, sizeof(*freq));

  128.     if (!freq)

  129.         return NULL;

  130. 

  131.     log_base = log(base);

  132.     log_end  = log(end);

  133.     for (x = 0; x < n; x++) {

  134.         double log_freq = log_base + (x + 0.5) * (log_end - log_base) * rcp_n;

  135.         freq[x] = exp(log_freq);

  136.     }

  137.     return freq;

  138. }

  139. 

  140. static double clip_with_log(void *log_ctx, const char *name,

  141.                             double val, double min, double max,

  142.                             double nan_replace, int idx)

  143. {

  144.     int level = AV_LOG_WARNING;

  145.     if (isnan(val)) {

  146.         av_log(log_ctx, level, "[%d] %s is nan, setting it to %g.\n",

  147.                idx, name, nan_replace);

  148.         val = nan_replace;

  149.     } else if (val < min) {

  150.         av_log(log_ctx, level, "[%d] %s is too low (%g), setting it to %g.\n",

  151.                idx, name, val, min);

  152.         val = min;

  153.     } else if (val > max) {

  154.         av_log(log_ctx, level, "[%d] %s it too high (%g), setting it to %g.\n",

  155.                idx, name, val, max);

  156.         val = max;

  157.     }

  158.     return val;

  159. }

  160. 

  161. static double a_weighting(void *p, double f)

  162. {

  163.     double ret = 12200.0*12200.0 * (f*f*f*f);

  164.     ret /= (f*f + 20.6*20.6) * (f*f + 12200.0*12200.0) *

  165.            sqrt((f*f + 107.7*107.7) * (f*f + 737.9*737.9));

  166.     return ret;

  167. }

  168. 

  169. static double b_weighting(void *p, double f)

  170. {

  171.     double ret = 12200.0*12200.0 * (f*f*f);

  172.     ret /= (f*f + 20.6*20.6) * (f*f + 12200.0*12200.0) * sqrt(f*f + 158.5*158.5);

  173.     return ret;

  174. }

  175. 

  176. static double c_weighting(void *p, double f)

  177. {

  178.     double ret = 12200.0*12200.0 * (f*f);

  179.     ret /= (f*f + 20.6*20.6) * (f*f + 12200.0*12200.0);

  180.     return ret;

  181. }

  182. 

  183. static int init_volume(ShowCQTContext *s)

  184. {

  185.     const char *func_names[] = { "a_weighting", "b_weighting", "c_weighting", NULL };

  186.     const char *sono_names[] = { "timeclamp", "tc", "frequency", "freq", "f", "bar_v", NULL };

  187.     const char *bar_names[] = { "timeclamp", "tc", "frequency", "freq", "f", "sono_v", NULL };

  188.     double (*funcs[])(void *, double) = { a_weighting, b_weighting, c_weighting };

  189.     AVExpr *sono = NULL, *bar = NULL;

  190.     int x, ret = AVERROR(ENOMEM);

  191. 

  192.     s->sono_v_buf = av_malloc_array(s->cqt_len, sizeof(*s->sono_v_buf));

  193.     s->bar_v_buf = av_malloc_array(s->cqt_len, sizeof(*s->bar_v_buf));

  194.     if (!s->sono_v_buf || !s->bar_v_buf)

  195.         goto error;

  196. 

  197.     if ((ret = av_expr_parse(&sono, s->sono_v, sono_names, func_names, funcs, NULL, NULL, 0, s->ctx)) < 0)

  198.         goto error;

  199. 

  200.     if ((ret = av_expr_parse(&bar, s->bar_v, bar_names, func_names, funcs, NULL, NULL, 0, s->ctx)) < 0)

  201.         goto error;

  202. 

  203.     for (x = 0; x < s->cqt_len; x++) {

  204.         double vars[] = { s->timeclamp, s->timeclamp, s->freq[x], s->freq[x], s->freq[x], 0.0 };

  205.         double vol = clip_with_log(s->ctx, "sono_v", av_expr_eval(sono, vars, NULL), 0.0, VOLUME_MAX, 0.0, x);

  206.         vars[5] = vol;

  207.         vol = clip_with_log(s->ctx, "bar_v", av_expr_eval(bar, vars, NULL), 0.0, VOLUME_MAX, 0.0, x);

  208.         s->bar_v_buf[x] = vol * vol;

  209.         vars[5] = vol;

  210.         vol = clip_with_log(s->ctx, "sono_v", av_expr_eval(sono, vars, NULL), 0.0, VOLUME_MAX, 0.0, x);

  211.         s->sono_v_buf[x] = vol * vol;

  212.     }

  213.     av_expr_free(sono);

  214.     av_expr_free(bar);

  215.     return 0;

  216. 

  217. error:

  218.     av_freep(&s->sono_v_buf);

  219.     av_freep(&s->bar_v_buf);

  220.     av_expr_free(sono);

  221.     av_expr_free(bar);

  222.     return ret;

  223. }

  224. 

  225. static void cqt_calc(FFTComplex *dst, const FFTComplex *src, const Coeffs *coeffs,

  226.                      int len, int fft_len)

  227. {

  228.     int k, x, i, j;

  229.     for (k = 0; k < len; k++) {

  230.         FFTComplex l, r, a = {0,0}, b = {0,0};

  231. 

  232.         for (x = 0; x < coeffs[k].len; x++) {

  233.             FFTSample u = coeffs[k].val[x];

  234.             i = coeffs[k].start + x;

  235.             j = fft_len - i;

  236.             a.re += u * src[i].re;

  237.             a.im += u * src[i].im;

  238.             b.re += u * src[j].re;

  239.             b.im += u * src[j].im;

  240.         }

  241. 

  242.         /* separate left and right, (and multiply by 2.0) */

  243.         l.re = a.re + b.re;

  244.         l.im = a.im - b.im;

  245.         r.re = b.im + a.im;

  246.         r.im = b.re - a.re;

  247.         dst[k].re = l.re * l.re + l.im * l.im;

  248.         dst[k].im = r.re * r.re + r.im * r.im;

  249.     }

  250. }

  251. 

  252. static int init_cqt(ShowCQTContext *s)

  253. {

  254.     const char *var_names[] = { "timeclamp", "tc", "frequency", "freq", "f", NULL };

  255.     AVExpr *expr = NULL;

  256.     int rate = s->ctx->inputs[0]->sample_rate;

  257.     int nb_cqt_coeffs = 0;

  258.     int k, x, ret;

  259. 

  260.     if ((ret = av_expr_parse(&expr, s->tlength, var_names, NULL, NULL, NULL, NULL, 0, s->ctx)) < 0)

  261.         goto error;

  262. 

  263.     ret = AVERROR(ENOMEM);

  264.     if (!(s->coeffs = av_calloc(s->cqt_len, sizeof(*s->coeffs))))

  265.         goto error;

  266. 

  267.     for (k = 0; k < s->cqt_len; k++) {

  268.         double vars[] = { s->timeclamp, s->timeclamp, s->freq[k], s->freq[k], s->freq[k] };

  269.         double flen, center, tlength;

  270.         int start, end, m = k;

  271. 

  272.         if (s->freq[k] > 0.5 * rate)

  273.             continue;

  274.         tlength = clip_with_log(s->ctx, "tlength", av_expr_eval(expr, vars, NULL),

  275.                                 TLENGTH_MIN, s->timeclamp, s->timeclamp, k);

  276. 

  277.         flen = 8.0 * s->fft_len / (tlength * rate);

  278.         center = s->freq[k] * s->fft_len / rate;

  279.         start = FFMAX(0, ceil(center - 0.5 * flen));

  280.         end = FFMIN(s->fft_len, floor(center + 0.5 * flen));

  281. 

  282.         s->coeffs[m].start = start & ~(s->cqt_align - 1);

  283.         s->coeffs[m].len = (end | (s->cqt_align - 1)) + 1 - s->coeffs[m].start;

  284.         nb_cqt_coeffs += s->coeffs[m].len;

  285.         if (!(s->coeffs[m].val = av_calloc(s->coeffs[m].len, sizeof(*s->coeffs[m].val))))

  286.             goto error;

  287. 

  288.         for (x = start; x <= end; x++) {

  289.             int sign = (x & 1) ? (-1) : 1;

  290.             double y = 2.0 * M_PI * (x - center) * (1.0 / flen);

  291.             /* nuttall window */

  292.             double w = 0.355768 + 0.487396 * cos(y) + 0.144232 * cos(2*y) + 0.012604 * cos(3*y);

  293.             w *= sign * (1.0 / s->fft_len);

  294.             s->coeffs[m].val[x - s->coeffs[m].start] = w;

  295.         }

  296.     }

  297. 

  298.     av_expr_free(expr);

  299.     av_log(s->ctx, AV_LOG_INFO, "nb_cqt_coeffs = %d.\n", nb_cqt_coeffs);

  300.     return 0;

  301. 

  302. error:

  303.     av_expr_free(expr);

  304.     if (s->coeffs)

  305.         for (k = 0; k < s->cqt_len; k++)

  306.             av_freep(&s->coeffs[k].val);

  307.     av_freep(&s->coeffs);

  308.     return ret;

  309. }

  310. 

  311. static AVFrame *alloc_frame_empty(enum AVPixelFormat format, int w, int h)

  312. {

  313.     AVFrame *out;

  314.     out = av_frame_alloc();

  315.     if (!out)

  316.         return NULL;

  317.     out->format = format;

  318.     out->width = w;

  319.     out->height = h;

  320.     if (av_frame_get_buffer(out, 32) < 0) {

  321.         av_frame_free(&out);

  322.         return NULL;

  323.     }

  324.     if (format == AV_PIX_FMT_RGB24 || format == AV_PIX_FMT_RGBA) {

  325.         memset(out->data[0], 0, out->linesize[0] * h);

  326.     } else {

  327.         int hh = (format == AV_PIX_FMT_YUV420P || format == AV_PIX_FMT_YUVA420P) ? h / 2 : h;

  328.         memset(out->data[0], 16, out->linesize[0] * h);

  329.         memset(out->data[1], 128, out->linesize[1] * hh);

  330.         memset(out->data[2], 128, out->linesize[2] * hh);

  331.         if (out->data[3])

  332.             memset(out->data[3], 0, out->linesize[3] * h);

  333.     }

  334.     return out;

  335. }

  336. 

  337. static enum AVPixelFormat convert_axis_pixel_format(enum AVPixelFormat format)

  338. {

  339.     switch (format) {

  340.         case AV_PIX_FMT_RGB24:   format = AV_PIX_FMT_RGBA; break;

  341.         case AV_PIX_FMT_YUV444P: format = AV_PIX_FMT_YUVA444P; break;

  342.         case AV_PIX_FMT_YUV422P: format = AV_PIX_FMT_YUVA422P; break;

  343.         case AV_PIX_FMT_YUV420P: format = AV_PIX_FMT_YUVA420P; break;

  344.     }

  345.     return format;

  346. }

  347. 

  348. static int init_axis_empty(ShowCQTContext *s)

  349. {

  350.     if (!(s->axis_frame = alloc_frame_empty(convert_axis_pixel_format(s->format), s->width, s->axis_h)))

  351.         return AVERROR(ENOMEM);

  352.     return 0;

  353. }

  354. 

  355. static int init_axis_from_file(ShowCQTContext *s)

  356. {

  357.     uint8_t *tmp_data[4] = { NULL };

  358.     int tmp_linesize[4];

  359.     enum AVPixelFormat tmp_format;

  360.     int tmp_w, tmp_h, ret;

  361. 

  362.     if ((ret = ff_load_image(tmp_data, tmp_linesize, &tmp_w, &tmp_h, &tmp_format,

  363.                              s->axisfile, s->ctx)) < 0)

  364.         goto error;

  365. 

  366.     ret = AVERROR(ENOMEM);

  367.     if (!(s->axis_frame = av_frame_alloc()))

  368.         goto error;

  369. 

  370.     if ((ret = ff_scale_image(s->axis_frame->data, s->axis_frame->linesize, s->width, s->axis_h,

  371.                               convert_axis_pixel_format(s->format), tmp_data, tmp_linesize, tmp_w, tmp_h,

  372.                               tmp_format, s->ctx)) < 0)

  373.         goto error;

  374. 

  375.     s->axis_frame->width = s->width;

  376.     s->axis_frame->height = s->axis_h;

  377.     s->axis_frame->format = convert_axis_pixel_format(s->format);

  378.     av_freep(tmp_data);

  379.     return 0;

  380. 

  381. error:

  382.     av_frame_free(&s->axis_frame);

  383.     av_freep(tmp_data);

  384.     return ret;

  385. }

  386. 

  387. static double midi(void *p, double f)

  388. {

  389.     return log2(f/440.0) * 12.0 + 69.0;

  390. }

  391. 

  392. static double r_func(void *p, double x)

  393. {

  394.     x = av_clipd(x, 0.0, 1.0);

  395.     return lrint(x*255.0) << 16;

  396. }

  397. 

  398. static double g_func(void *p, double x)

  399. {

  400.     x = av_clipd(x, 0.0, 1.0);

  401.     return lrint(x*255.0) << 8;

  402. }

  403. 

  404. static double b_func(void *p, double x)

  405. {

  406.     x = av_clipd(x, 0.0, 1.0);

  407.     return lrint(x*255.0);

  408. }

  409. 

  410. static int init_axis_color(ShowCQTContext *s, AVFrame *tmp)

  411. {

  412.     const char *var_names[] = { "timeclamp", "tc", "frequency", "freq", "f", NULL };

  413.     const char *func_names[] = { "midi", "r", "g", "b", NULL };

  414.     double (*funcs[])(void *, double) = { midi, r_func, g_func, b_func };

  415.     AVExpr *expr = NULL;

  416.     double *freq = NULL;

  417.     int x, y, ret;

  418. 

  419.     if (s->basefreq != (double) BASEFREQ || s->endfreq != (double) ENDFREQ) {

  420.         av_log(s->ctx, AV_LOG_WARNING, "font axis rendering is not implemented in non-default frequency range,"

  421.                " please use axisfile option instead.\n");

  422.         return AVERROR(EINVAL);

  423.     }

  424. 

  425.     if (s->cqt_len == 1920)

  426.         freq = s->freq;

  427.     else if (!(freq = create_freq_table(s->basefreq, s->endfreq, 1920)))

  428.         return AVERROR(ENOMEM);

  429. 

  430.     if ((ret = av_expr_parse(&expr, s->fontcolor, var_names, func_names, funcs, NULL, NULL, 0, s->ctx)) < 0) {

  431.         if (freq != s->freq)

  432.             av_freep(&freq);

  433.         return ret;

  434.     }

  435. 

  436.     for (x = 0; x < 1920; x++) {

  437.         double vars[] = { s->timeclamp, s->timeclamp, freq[x], freq[x], freq[x] };

  438.         int color = (int) av_expr_eval(expr, vars, NULL);

  439.         uint8_t r = (color >> 16) & 0xFF, g = (color >> 8) & 0xFF, b = color & 0xFF;

  440.         uint8_t *data = tmp->data[0];

  441.         int linesize = tmp->linesize[0];

  442.         for (y = 0; y < 32; y++) {

  443.             data[linesize * y + 4 * x] = r;

  444.             data[linesize * y + 4 * x + 1] = g;

  445.             data[linesize * y + 4 * x + 2] = b;

  446.             data[linesize * y + 4 * x + 3] = 0;

  447.         }

  448.     }

  449. 

  450.     av_expr_free(expr);

  451.     if (freq != s->freq)

  452.         av_freep(&freq);

  453.     return 0;

  454. }

  455. 

  456. static int render_freetype(ShowCQTContext *s, AVFrame *tmp)

  457. {

  458. #if CONFIG_LIBFREETYPE

  459.     const char *str = "EF G A BC D ";

  460.     uint8_t *data = tmp->data[0];

  461.     int linesize = tmp->linesize[0];

  462.     FT_Library lib = NULL;

  463.     FT_Face face = NULL;

  464.     int font_width = 16, font_height = 32;

  465.     int font_repeat = font_width * 12;

  466.     int linear_hori_advance = font_width * 65536;

  467.     int non_monospace_warning = 0;

  468.     int x;

  469. 

  470.     if (!s->fontfile)

  471.         return AVERROR(EINVAL);

  472. 

  473.     if (FT_Init_FreeType(&lib))

  474.         goto fail;

  475. 

  476.     if (FT_New_Face(lib, s->fontfile, 0, &face))

  477.         goto fail;

  478. 

  479.     if (FT_Set_Char_Size(face, 16*64, 0, 0, 0))

  480.         goto fail;

  481. 

  482.     if (FT_Load_Char(face, 'A', FT_LOAD_RENDER))

  483.         goto fail;

  484. 

  485.     if (FT_Set_Char_Size(face, 16*64 * linear_hori_advance / face->glyph->linearHoriAdvance, 0, 0, 0))

  486.         goto fail;

  487. 

  488.     for (x = 0; x < 12; x++) {

  489.         int sx, sy, rx, bx, by, dx, dy;

  490. 

  491.         if (str[x] == ' ')

  492.             continue;

  493. 

  494.         if (FT_Load_Char(face, str[x], FT_LOAD_RENDER))

  495.             goto fail;

  496. 

  497.         if (face->glyph->advance.x != font_width*64 && !non_monospace_warning) {

  498.             av_log(s->ctx, AV_LOG_WARNING, "font is not monospace.\n");

  499.             non_monospace_warning = 1;

  500.         }

  501. 

  502.         sy = font_height - 8 - face->glyph->bitmap_top;

  503.         for (rx = 0; rx < 10; rx++) {

  504.             sx = rx * font_repeat + x * font_width + face->glyph->bitmap_left;

  505.             for (by = 0; by < face->glyph->bitmap.rows; by++) {

  506.                 dy = by + sy;

  507.                 if (dy < 0)

  508.                     continue;

  509.                 if (dy >= font_height)

  510.                     break;

  511. 

  512.                 for (bx = 0; bx < face->glyph->bitmap.width; bx++) {

  513.                     dx = bx + sx;

  514.                     if (dx < 0)

  515.                         continue;

  516.                     if (dx >= 1920)

  517.                         break;

  518.                     data[dy*linesize+4*dx+3] = face->glyph->bitmap.buffer[by*face->glyph->bitmap.width+bx];

  519.                 }

  520.             }

  521.         }

  522.     }

  523. 

  524.     FT_Done_Face(face);

  525.     FT_Done_FreeType(lib);

  526.     return 0;

  527. 

  528. fail:

  529.     av_log(s->ctx, AV_LOG_WARNING, "error while loading freetype font, using default font instead.\n");

  530.     FT_Done_Face(face);

  531.     FT_Done_FreeType(lib);

  532.     return AVERROR(EINVAL);

  533. #else

  534.     if (s->fontfile)

  535.         av_log(s->ctx, AV_LOG_WARNING, "freetype is not available, ignoring fontfile option.\n");

  536.     return AVERROR(EINVAL);

  537. #endif

  538. }

  539. 

  540. static int render_default_font(AVFrame *tmp)

  541. {

  542.     const char *str = "EF G A BC D ";

  543.     int x, u, v, mask;

  544.     uint8_t *data = tmp->data[0];

  545.     int linesize = tmp->linesize[0];

  546. 

  547.     for (x = 0; x < 1920; x += 192) {

  548.         uint8_t *startptr = data + 4 * x;

  549.         for (u = 0; u < 12; u++) {

  550.             for (v = 0; v < 16; v++) {

  551.                 uint8_t *p = startptr + 2 * v * linesize + 16 * 4 * u;

  552.                 for (mask = 0x80; mask; mask >>= 1, p += 8) {

  553.                     if (mask & avpriv_vga16_font[str[u] * 16 + v]) {

  554.                         p[3] = 255;

  555.                         p[7] = 255;

  556.                         p[linesize+3] = 255;

  557.                         p[linesize+7] = 255;

  558.                     }

  559.                 }

  560.             }

  561.         }

  562.     }

  563. 

  564.     return 0;

  565. }

  566. 

  567. static int init_axis_from_font(ShowCQTContext *s)

  568. {

  569.     AVFrame *tmp = NULL;

  570.     int ret = AVERROR(ENOMEM);

  571. 

  572.     if (!(tmp = alloc_frame_empty(AV_PIX_FMT_RGBA, 1920, 32)))

  573.         goto fail;

  574. 

  575.     if (!(s->axis_frame = av_frame_alloc()))

  576.         goto fail;

  577. 

  578.     if ((ret = init_axis_color(s, tmp)) < 0)

  579.         goto fail;

  580. 

  581.     if (render_freetype(s, tmp) < 0 && (ret = render_default_font(tmp)) < 0)

  582.         goto fail;

  583. 

  584.     if ((ret = ff_scale_image(s->axis_frame->data, s->axis_frame->linesize, s->width, s->axis_h,

  585.                               convert_axis_pixel_format(s->format), tmp->data, tmp->linesize,

  586.                               1920, 32, AV_PIX_FMT_RGBA, s->ctx)) < 0)

  587.         goto fail;

  588. 

  589.     av_frame_free(&tmp);

  590.     s->axis_frame->width = s->width;

  591.     s->axis_frame->height = s->axis_h;

  592.     s->axis_frame->format = convert_axis_pixel_format(s->format);

  593.     return 0;

  594. 

  595. fail:

  596.     av_frame_free(&tmp);

  597.     av_frame_free(&s->axis_frame);

  598.     return ret;

  599. }

  600. 

  601. static float calculate_gamma(float v, float g)

  602. {

  603.     if (g == 1.0f)

  604.         return v;

  605.     if (g == 2.0f)

  606.         return sqrtf(v);

  607.     if (g == 3.0f)

  608.         return cbrtf(v);

  609.     if (g == 4.0f)

  610.         return sqrtf(sqrtf(v));

  611.     return expf(logf(v) / g);

  612. }

  613. 

  614. static void rgb_from_cqt(ColorFloat *c, const FFTComplex *v, float g, int len)

  615. {

  616.     int x;

  617.     for (x = 0; x < len; x++) {

  618.         c[x].rgb.r = 255.0f * calculate_gamma(FFMIN(1.0f, v[x].re), g);

  619.         c[x].rgb.g = 255.0f * calculate_gamma(FFMIN(1.0f, 0.5f * (v[x].re + v[x].im)), g);

  620.         c[x].rgb.b = 255.0f * calculate_gamma(FFMIN(1.0f, v[x].im), g);

  621.     }

  622. }

  623. 

  624. static void yuv_from_cqt(ColorFloat *c, const FFTComplex *v, float gamma, int len)

  625. {

  626.     int x;

  627.     for (x = 0; x < len; x++) {

  628.         float r, g, b;

  629.         r = calculate_gamma(FFMIN(1.0f, v[x].re), gamma);

  630.         g = calculate_gamma(FFMIN(1.0f, 0.5f * (v[x].re + v[x].im)), gamma);

  631.         b = calculate_gamma(FFMIN(1.0f, v[x].im), gamma);

  632.         c[x].yuv.y = 65.481f * r + 128.553f * g + 24.966f * b;

  633.         c[x].yuv.u = -37.797f * r - 74.203f * g + 112.0f * b;

  634.         c[x].yuv.v = 112.0f * r - 93.786f * g - 18.214 * b;

  635.     }

  636. }

  637. 

  638. static void draw_bar_rgb(AVFrame *out, const float *h, const float *rcp_h,

  639.                          const ColorFloat *c, int bar_h)

  640. {

  641.     int x, y, w = out->width;

  642.     float mul, ht, rcp_bar_h = 1.0f / bar_h;

  643.     uint8_t *v = out->data[0], *lp;

  644.     int ls = out->linesize[0];

  645. 

  646.     for (y = 0; y < bar_h; y++) {

  647.         ht = (bar_h - y) * rcp_bar_h;

  648.         lp = v + y * ls;

  649.         for (x = 0; x < w; x++) {

  650.             if (h[x] <= ht) {

  651.                 *lp++ = 0;

  652.                 *lp++ = 0;

  653.                 *lp++ = 0;

  654.             } else {

  655.                 mul = (h[x] - ht) * rcp_h[x];

  656.                 *lp++ = lrintf(mul * c[x].rgb.r);

  657.                 *lp++ = lrintf(mul * c[x].rgb.g);

  658.                 *lp++ = lrintf(mul * c[x].rgb.b);

  659.             }

  660.         }

  661.     }

  662. }

  663. 

  664. #define DRAW_BAR_WITH_CHROMA(x) \

  665. do { \

  666.     if (h[x] <= ht) { \

  667.         *lpy++ = 16; \

  668.         *lpu++ = 128; \

  669.         *lpv++ = 128; \

  670.     } else { \

  671.         mul = (h[x] - ht) * rcp_h[x]; \

  672.         *lpy++ = lrintf(mul * c[x].yuv.y + 16.0f); \

  673.         *lpu++ = lrintf(mul * c[x].yuv.u + 128.0f); \

  674.         *lpv++ = lrintf(mul * c[x].yuv.v + 128.0f); \

  675.     } \

  676. } while (0)

  677. 

  678. #define DRAW_BAR_WITHOUT_CHROMA(x) \

  679. do { \

  680.     if (h[x] <= ht) { \

  681.         *lpy++ = 16; \

  682.     } else { \

  683.         mul = (h[x] - ht) * rcp_h[x]; \

  684.         *lpy++ = lrintf(mul * c[x].yuv.y + 16.0f); \

  685.     } \

  686. } while (0)

  687. 

  688. static void draw_bar_yuv(AVFrame *out, const float *h, const float *rcp_h,

  689.                          const ColorFloat *c, int bar_h)

  690. {

  691.     int x, y, yh, w = out->width;

  692.     float mul, ht, rcp_bar_h = 1.0f / bar_h;

  693.     uint8_t *vy = out->data[0], *vu = out->data[1], *vv = out->data[2];

  694.     uint8_t *lpy, *lpu, *lpv;

  695.     int lsy = out->linesize[0], lsu = out->linesize[1], lsv = out->linesize[2];

  696.     int fmt = out->format;

  697. 

  698.     for (y = 0; y < bar_h; y += 2) {

  699.         yh = (fmt == AV_PIX_FMT_YUV420P) ? y / 2 : y;

  700.         ht = (bar_h - y) * rcp_bar_h;

  701.         lpy = vy + y * lsy;

  702.         lpu = vu + yh * lsu;

  703.         lpv = vv + yh * lsv;

  704.         if (fmt == AV_PIX_FMT_YUV444P) {

  705.             for (x = 0; x < w; x += 2) {

  706.                 DRAW_BAR_WITH_CHROMA(x);

  707.                 DRAW_BAR_WITH_CHROMA(x+1);

  708.             }

  709.         } else {

  710.             for (x = 0; x < w; x += 2) {

  711.                 DRAW_BAR_WITH_CHROMA(x);

  712.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  713.             }

  714.         }

  715. 

  716.         ht = (bar_h - (y+1)) * rcp_bar_h;

  717.         lpy = vy + (y+1) * lsy;

  718.         lpu = vu + (y+1) * lsu;

  719.         lpv = vv + (y+1) * lsv;

  720.         if (fmt == AV_PIX_FMT_YUV444P) {

  721.             for (x = 0; x < w; x += 2) {

  722.                 DRAW_BAR_WITH_CHROMA(x);

  723.                 DRAW_BAR_WITH_CHROMA(x+1);

  724.             }

  725.         } else if (fmt == AV_PIX_FMT_YUV422P) {

  726.             for (x = 0; x < w; x += 2) {

  727.                 DRAW_BAR_WITH_CHROMA(x);

  728.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  729.             }

  730.         } else {

  731.             for (x = 0; x < w; x += 2) {

  732.                 DRAW_BAR_WITHOUT_CHROMA(x);

  733.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  734.             }

  735.         }

  736.     }

  737. }

  738. 

  739. static void draw_axis_rgb(AVFrame *out, AVFrame *axis, const ColorFloat *c, int off)

  740. {

  741.     int x, y, w = axis->width, h = axis->height;

  742.     float a, rcp_255 = 1.0f / 255.0f;

  743.     uint8_t *lp, *lpa;

  744. 

  745.     for (y = 0; y < h; y++) {

  746.         lp = out->data[0] + (off + y) * out->linesize[0];

  747.         lpa = axis->data[0] + y * axis->linesize[0];

  748.         for (x = 0; x < w; x++) {

  749.             if (!lpa[3]) {

  750.                 *lp++ = lrintf(c[x].rgb.r);

  751.                 *lp++ = lrintf(c[x].rgb.g);

  752.                 *lp++ = lrintf(c[x].rgb.b);

  753.             } else if (lpa[3] == 255) {

  754.                 *lp++ = lpa[0];

  755.                 *lp++ = lpa[1];

  756.                 *lp++ = lpa[2];

  757.             } else {

  758.                 a = rcp_255 * lpa[3];

  759.                 *lp++ = lrintf(a * lpa[0] + (1.0f - a) * c[x].rgb.r);

  760.                 *lp++ = lrintf(a * lpa[1] + (1.0f - a) * c[x].rgb.g);

  761.                 *lp++ = lrintf(a * lpa[2] + (1.0f - a) * c[x].rgb.b);

  762.             }

  763.             lpa += 4;

  764.         }

  765.     }

  766. }

  767. 

  768. #define BLEND_WITH_CHROMA(c) \

  769. do { \

  770.     if (!*lpaa) { \

  771.         *lpy = lrintf(c.yuv.y + 16.0f); \

  772.         *lpu = lrintf(c.yuv.u + 128.0f); \

  773.         *lpv = lrintf(c.yuv.v + 128.0f); \

  774.     } else if (255 == *lpaa) { \

  775.         *lpy = *lpay; \

  776.         *lpu = *lpau; \

  777.         *lpv = *lpav; \

  778.     } else { \

  779.         float a = (1.0f/255.0f) * (*lpaa); \

  780.         *lpy = lrintf(a * (*lpay) + (1.0f - a) * (c.yuv.y + 16.0f)); \

  781.         *lpu = lrintf(a * (*lpau) + (1.0f - a) * (c.yuv.u + 128.0f)); \

  782.         *lpv = lrintf(a * (*lpav) + (1.0f - a) * (c.yuv.v + 128.0f)); \

  783.     } \

  784.     lpy++; lpu++; lpv++; \

  785.     lpay++; lpau++; lpav++; lpaa++; \

  786. } while (0)

  787. 

  788. #define BLEND_WITHOUT_CHROMA(c) \

  789. do { \

  790.     if (!*lpaa) { \

  791.         *lpy = lrintf(c.yuv.y + 16.0f); \

  792.     } else if (255 == *lpaa) { \

  793.         *lpy = *lpay; \

  794.     } else { \

  795.         float a = (1.0f/255.0f) * (*lpaa); \

  796.         *lpy = lrintf(a * (*lpay) + (1.0f - a) * (c.yuv.y + 16.0f)); \

  797.     } \

  798.     lpy++; \

  799.     lpay++; lpaa++; \

  800. } while (0)

  801. 

  802. static void draw_axis_yuv(AVFrame *out, AVFrame *axis, const ColorFloat *c, int off)

  803. {

  804.     int fmt = out->format, x, y, yh, w = axis->width, h = axis->height;

  805.     int offh = (fmt == AV_PIX_FMT_YUV420P) ? off / 2 : off;

  806.     uint8_t *vy = out->data[0], *vu = out->data[1], *vv = out->data[2];

  807.     uint8_t *vay = axis->data[0], *vau = axis->data[1], *vav = axis->data[2], *vaa = axis->data[3];

  808.     int lsy = out->linesize[0], lsu = out->linesize[1], lsv = out->linesize[2];

  809.     int lsay = axis->linesize[0], lsau = axis->linesize[1], lsav = axis->linesize[2], lsaa = axis->linesize[3];

  810.     uint8_t *lpy, *lpu, *lpv, *lpay, *lpau, *lpav, *lpaa;

  811. 

  812.     for (y = 0; y < h; y += 2) {

  813.         yh = (fmt == AV_PIX_FMT_YUV420P) ? y / 2 : y;

  814.         lpy = vy + (off + y) * lsy;

  815.         lpu = vu + (offh + yh) * lsu;

  816.         lpv = vv + (offh + yh) * lsv;

  817.         lpay = vay + y * lsay;

  818.         lpau = vau + yh * lsau;

  819.         lpav = vav + yh * lsav;

  820.         lpaa = vaa + y * lsaa;

  821.         if (fmt == AV_PIX_FMT_YUV444P) {

  822.             for (x = 0; x < w; x += 2) {

  823.                 BLEND_WITH_CHROMA(c[x]);

  824.                 BLEND_WITH_CHROMA(c[x+1]);

  825.             }

  826.         } else {

  827.             for (x = 0; x < w; x += 2) {

  828.                 BLEND_WITH_CHROMA(c[x]);

  829.                 BLEND_WITHOUT_CHROMA(c[x+1]);

  830.             }

  831.         }

  832. 

  833.         lpy = vy + (off + y + 1) * lsy;

  834.         lpu = vu + (off + y + 1) * lsu;

  835.         lpv = vv + (off + y + 1) * lsv;

  836.         lpay = vay + (y + 1) * lsay;

  837.         lpau = vau + (y + 1) * lsau;

  838.         lpav = vav + (y + 1) * lsav;

  839.         lpaa = vaa + (y + 1) * lsaa;

  840.         if (fmt == AV_PIX_FMT_YUV444P) {

  841.             for (x = 0; x < w; x += 2) {

  842.                 BLEND_WITH_CHROMA(c[x]);

  843.                 BLEND_WITH_CHROMA(c[x+1]);

  844.             }

  845.         } else if (fmt == AV_PIX_FMT_YUV422P) {

  846.             for (x = 0; x < w; x += 2) {

  847.                 BLEND_WITH_CHROMA(c[x]);

  848.                 BLEND_WITHOUT_CHROMA(c[x+1]);

  849.             }

  850.         } else {

  851.             for (x = 0; x < w; x += 2) {

  852.                 BLEND_WITHOUT_CHROMA(c[x]);

  853.                 BLEND_WITHOUT_CHROMA(c[x+1]);

  854.             }

  855.         }

  856.     }

  857. }

  858. 

  859. static void draw_sono(AVFrame *out, AVFrame *sono, int off, int idx)

  860. {

  861.     int fmt = out->format, h = sono->height;

  862.     int nb_planes = (fmt == AV_PIX_FMT_RGB24) ? 1 : 3;

  863.     int offh = (fmt == AV_PIX_FMT_YUV420P) ? off / 2 : off;

  864.     int inc = (fmt == AV_PIX_FMT_YUV420P) ? 2 : 1;

  865.     int ls, i, y, yh;

  866. 

  867.     ls = FFMIN(out->linesize[0], sono->linesize[0]);

  868.     for (y = 0; y < h; y++) {

  869.         memcpy(out->data[0] + (off + y) * out->linesize[0],

  870.                sono->data[0] + (idx + y) % h * sono->linesize[0], ls);

  871.     }

  872. 

  873.     for (i = 1; i < nb_planes; i++) {

  874.         ls = FFMIN(out->linesize[i], sono->linesize[i]);

  875.         for (y = 0; y < h; y += inc) {

  876.             yh = (fmt == AV_PIX_FMT_YUV420P) ? y / 2 : y;

  877.             memcpy(out->data[i] + (offh + yh) * out->linesize[i],

  878.                    sono->data[i] + (idx + y) % h * sono->linesize[i], ls);

  879.         }

  880.     }

  881. }

  882. 

  883. static void update_sono_rgb(AVFrame *sono, const ColorFloat *c, int idx)

  884. {

  885.     int x, w = sono->width;

  886.     uint8_t *lp = sono->data[0] + idx * sono->linesize[0];

  887. 

  888.     for (x = 0; x < w; x++) {

  889.         *lp++ = lrintf(c[x].rgb.r);

  890.         *lp++ = lrintf(c[x].rgb.g);

  891.         *lp++ = lrintf(c[x].rgb.b);

  892.     }

  893. }

  894. 

  895. static void update_sono_yuv(AVFrame *sono, const ColorFloat *c, int idx)

  896. {

  897.     int x, fmt = sono->format, w = sono->width;

  898.     uint8_t *lpy = sono->data[0] + idx * sono->linesize[0];

  899.     uint8_t *lpu = sono->data[1] + idx * sono->linesize[1];

  900.     uint8_t *lpv = sono->data[2] + idx * sono->linesize[2];

  901. 

  902.     for (x = 0; x < w; x += 2) {

  903.         *lpy++ = lrintf(c[x].yuv.y + 16.0f);

  904.         *lpu++ = lrintf(c[x].yuv.u + 128.0f);

  905.         *lpv++ = lrintf(c[x].yuv.v + 128.0f);

  906.         *lpy++ = lrintf(c[x+1].yuv.y + 16.0f);

  907.         if (fmt == AV_PIX_FMT_YUV444P) {

  908.             *lpu++ = lrintf(c[x+1].yuv.u + 128.0f);

  909.             *lpv++ = lrintf(c[x+1].yuv.v + 128.0f);

  910.         }

  911.     }

  912. }

  913. 

  914. static void process_cqt(ShowCQTContext *s)

  915. {

  916.     int x, i;

  917.     if (!s->sono_count) {

  918.         for (x = 0; x < s->cqt_len; x++) {

  919.             s->h_buf[x] = s->bar_v_buf[x] * 0.5f * (s->cqt_result[x].re + s->cqt_result[x].im);

  920.         }

  921.         if (s->fcount > 1) {

  922.             float rcp_fcount = 1.0f / s->fcount;

  923.             for (x = 0; x < s->width; x++) {

  924.                 float h = 0.0f;

  925.                 for (i = 0; i < s->fcount; i++)

  926.                     h += s->h_buf[s->fcount * x + i];

  927.                 s->h_buf[x] = rcp_fcount * h;

  928.             }

  929.         }

  930.         for (x = 0; x < s->width; x++) {

  931.             s->h_buf[x] = calculate_gamma(s->h_buf[x], s->bar_g);

  932.             s->rcp_h_buf[x] = 1.0f / (s->h_buf[x] + 0.0001f);

  933.         }

  934.     }

  935. 

  936.     for (x = 0; x < s->cqt_len; x++) {

  937.         s->cqt_result[x].re *= s->sono_v_buf[x];

  938.         s->cqt_result[x].im *= s->sono_v_buf[x];

  939.     }

  940. 

  941.     if (s->fcount > 1) {

  942.         float rcp_fcount = 1.0f / s->fcount;

  943.         for (x = 0; x < s->width; x++) {

  944.             FFTComplex result = {0.0f, 0.0f};

  945.             for (i = 0; i < s->fcount; i++) {

  946.                 result.re += s->cqt_result[s->fcount * x + i].re;

  947.                 result.im += s->cqt_result[s->fcount * x + i].im;

  948.             }

  949.             s->cqt_result[x].re = rcp_fcount * result.re;

  950.             s->cqt_result[x].im = rcp_fcount * result.im;

  951.         }

  952.     }

  953. 

  954.     if (s->format == AV_PIX_FMT_RGB24)

  955.         rgb_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width);

  956.     else

  957.         yuv_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width);

  958. }

  959. 

  960. static int plot_cqt(AVFilterContext *ctx, AVFrame **frameout)

  961. {

  962.     AVFilterLink *outlink = ctx->outputs[0];

  963.     ShowCQTContext *s = ctx->priv;

  964. 

  965.     memcpy(s->fft_result, s->fft_data, s->fft_len * sizeof(*s->fft_data));

  966.     av_fft_permute(s->fft_ctx, s->fft_result);

  967.     av_fft_calc(s->fft_ctx, s->fft_result);

  968.     s->fft_result[s->fft_len] = s->fft_result[0];

  969.     s->cqt_calc(s->cqt_result, s->fft_result, s->coeffs, s->cqt_len, s->fft_len);

  970.     process_cqt(s);

  971.     if (s->sono_h)

  972.         s->update_sono(s->sono_frame, s->c_buf, s->sono_idx);

  973.     if (!s->sono_count) {

  974.         AVFrame *out = *frameout = ff_get_video_buffer(outlink, outlink->w, outlink->h);

  975.         if (!out)

  976.             return AVERROR(ENOMEM);

  977.         if (s->bar_h)

  978.             s->draw_bar(out, s->h_buf, s->rcp_h_buf, s->c_buf, s->bar_h);

  979.         if (s->axis_h)

  980.             s->draw_axis(out, s->axis_frame, s->c_buf, s->bar_h);

  981.         if (s->sono_h)

  982.             s->draw_sono(out, s->sono_frame, s->bar_h + s->axis_h, s->sono_idx);

  983.         out->pts = s->next_pts;

  984.         s->next_pts += PTS_STEP;

  985.     }

  986.     s->sono_count = (s->sono_count + 1) % s->count;

  987.     if (s->sono_h)

  988.         s->sono_idx = (s->sono_idx + s->sono_h - 1) % s->sono_h;

  989.     return 0;

  990. }

  991. 

  992. /* main filter control */

  993. static av_cold int init(AVFilterContext *ctx)

  994. {

  995.     ShowCQTContext *s = ctx->priv;

  996.     s->ctx = ctx;

  997. 

  998.     if (!s->fullhd) {

  999.         av_log(ctx, AV_LOG_WARNING, "fullhd option is deprecated, use size/s option instead.\n");

  1000.         if (s->width != 1920 || s->height != 1080) {

  1001.             av_log(ctx, AV_LOG_ERROR, "fullhd set to 0 but with custom dimension.\n");

  1002.             return AVERROR(EINVAL);

  1003.         }

  1004.         s->width /= 2;

  1005.         s->height /= 2;

  1006.         s->fullhd = 1;

  1007.     }

  1008. 

  1009.     if (s->axis_h < 0) {

  1010.         s->axis_h = s->width / 60;

  1011.         if (s->axis_h & 1)

  1012.             s->axis_h++;

  1013.         if (s->bar_h >= 0 && s->sono_h >= 0)

  1014.             s->axis_h = s->height - s->bar_h - s->sono_h;

  1015.         if (s->bar_h >= 0 && s->sono_h < 0)

  1016.             s->axis_h = FFMIN(s->axis_h, s->height - s->bar_h);

  1017.         if (s->bar_h < 0 && s->sono_h >= 0)

  1018.             s->axis_h = FFMIN(s->axis_h, s->height - s->sono_h);

  1019.     }

  1020. 

  1021.     if (s->bar_h < 0) {

  1022.         s->bar_h = (s->height - s->axis_h) / 2;

  1023.         if (s->bar_h & 1)

  1024.             s->bar_h--;

  1025.         if (s->sono_h >= 0)

  1026.             s->bar_h = s->height - s->sono_h - s->axis_h;

  1027.     }

  1028. 

  1029.     if (s->sono_h < 0)

  1030.         s->sono_h = s->height - s->axis_h - s->bar_h;

  1031. 

  1032.     if ((s->width & 1) || (s->height & 1) || (s->bar_h & 1) || (s->axis_h & 1) || (s->sono_h & 1) ||

  1033.         (s->bar_h < 0) || (s->axis_h < 0) || (s->sono_h < 0) || (s->bar_h > s->height) ||

  1034.         (s->axis_h > s->height) || (s->sono_h > s->height) || (s->bar_h + s->axis_h + s->sono_h != s->height)) {

  1035.         av_log(ctx, AV_LOG_ERROR, "invalid dimension.\n");

  1036.         return AVERROR(EINVAL);

  1037.     }

  1038. 

  1039.     if (!s->fcount) {

  1040.         do {

  1041.             s->fcount++;

  1042.         } while(s->fcount * s->width < 1920 && s->fcount < 10);

  1043.     }

  1044. 

  1045.     return 0;

  1046. }

  1047. 

  1048. static av_cold void uninit(AVFilterContext *ctx)

  1049. {

  1050.     common_uninit(ctx->priv);

  1051. }

  1052. 

  1053. static int query_formats(AVFilterContext *ctx)

  1054. {

  1055.     AVFilterFormats *formats = NULL;

  1056.     AVFilterChannelLayouts *layouts = NULL;

  1057.     AVFilterLink *inlink = ctx->inputs[0];

  1058.     AVFilterLink *outlink = ctx->outputs[0];

  1059.     enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };

  1060.     enum AVPixelFormat pix_fmts[] = {

  1061.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,

  1062.         AV_PIX_FMT_YUV444P, AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE

  1063.     };

  1064.     int64_t channel_layouts[] = { AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_STEREO_DOWNMIX, -1 };

  1065.     int ret;

  1066. 

  1067.     /* set input audio formats */

  1068.     formats = ff_make_format_list(sample_fmts);

  1069.     if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)

  1070.         return ret;

  1071. 

  1072.     layouts = avfilter_make_format64_list(channel_layouts);

  1073.     if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)

  1074.         return ret;

  1075. 

  1076.     formats = ff_all_samplerates();

  1077.     if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)

  1078.         return ret;

  1079. 

  1080.     /* set output video format */

  1081.     formats = ff_make_format_list(pix_fmts);

  1082.     if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)

  1083.         return ret;

  1084. 

  1085.     return 0;

  1086. }

  1087. 

  1088. static int config_output(AVFilterLink *outlink)

  1089. {

  1090.     AVFilterContext *ctx = outlink->src;

  1091.     AVFilterLink *inlink = ctx->inputs[0];

  1092.     ShowCQTContext *s = ctx->priv;

  1093.     int ret;

  1094. 

  1095.     common_uninit(s);

  1096. 

  1097.     outlink->w = s->width;

  1098.     outlink->h = s->height;

  1099.     s->format = outlink->format;

  1100.     outlink->sample_aspect_ratio = av_make_q(1, 1);

  1101.     outlink->frame_rate = s->rate;

  1102.     outlink->time_base = av_mul_q(av_inv_q(s->rate), av_make_q(1, PTS_STEP));

  1103.     av_log(ctx, AV_LOG_INFO, "video: %dx%d %s %d/%d fps, bar_h = %d, axis_h = %d, sono_h = %d.\n",

  1104.            s->width, s->height, av_get_pix_fmt_name(s->format), s->rate.num, s->rate.den,

  1105.            s->bar_h, s->axis_h, s->sono_h);

  1106. 

  1107.     s->cqt_len = s->width * s->fcount;

  1108.     if (!(s->freq = create_freq_table(s->basefreq, s->endfreq, s->cqt_len)))

  1109.         return AVERROR(ENOMEM);

  1110. 

  1111.     if ((ret = init_volume(s)) < 0)

  1112.         return ret;

  1113. 

  1114.     s->fft_bits = ceil(log2(inlink->sample_rate * s->timeclamp));

  1115.     s->fft_len = 1 << s->fft_bits;

  1116.     av_log(ctx, AV_LOG_INFO, "fft_len = %d, cqt_len = %d.\n", s->fft_len, s->cqt_len);

  1117. 

  1118.     s->fft_ctx = av_fft_init(s->fft_bits, 0);

  1119.     s->fft_data = av_calloc(s->fft_len, sizeof(*s->fft_data));

  1120.     s->fft_result = av_calloc(s->fft_len + 64, sizeof(*s->fft_result));

  1121.     s->cqt_result = av_malloc_array(s->cqt_len, sizeof(*s->cqt_result));

  1122.     if (!s->fft_ctx || !s->fft_data || !s->fft_result || !s->cqt_result)

  1123.         return AVERROR(ENOMEM);

  1124. 

  1125.     s->cqt_align = 1;

  1126.     s->cqt_calc = cqt_calc;

  1127.     s->draw_sono = draw_sono;

  1128.     if (s->format == AV_PIX_FMT_RGB24) {

  1129.         s->draw_bar = draw_bar_rgb;

  1130.         s->draw_axis = draw_axis_rgb;

  1131.         s->update_sono = update_sono_rgb;

  1132.     } else {

  1133.         s->draw_bar = draw_bar_yuv;

  1134.         s->draw_axis = draw_axis_yuv;

  1135.         s->update_sono = update_sono_yuv;

  1136.     }

  1137. 

  1138.     if ((ret = init_cqt(s)) < 0)

  1139.         return ret;

  1140. 

  1141.     if (s->axis_h) {

  1142.         if (!s->axis) {

  1143.             if ((ret = init_axis_empty(s)) < 0)

  1144.                 return ret;

  1145.         } else if (s->axisfile) {

  1146.             if (init_axis_from_file(s) < 0) {

  1147.                 av_log(ctx, AV_LOG_WARNING, "loading axis image failed, fallback to font rendering.\n");

  1148.                 if (init_axis_from_font(s) < 0) {

  1149.                     av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");

  1150.                     if ((ret = init_axis_empty(s)) < 0)

  1151.                         return ret;

  1152.                 }

  1153.             }

  1154.         } else {

  1155.             if (init_axis_from_font(s) < 0) {

  1156.                 av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");

  1157.                 if ((ret = init_axis_empty(s)) < 0)

  1158.                     return ret;

  1159.             }

  1160.         }

  1161.     }

  1162. 

  1163.     if (s->sono_h) {

  1164.         s->sono_frame = alloc_frame_empty((outlink->format == AV_PIX_FMT_YUV420P) ?

  1165.                         AV_PIX_FMT_YUV422P : outlink->format, s->width, s->sono_h);

  1166.         if (!s->sono_frame)

  1167.             return AVERROR(ENOMEM);

  1168.     }

  1169. 

  1170.     s->h_buf = av_malloc_array(s->cqt_len, sizeof (*s->h_buf));

  1171.     s->rcp_h_buf = av_malloc_array(s->width, sizeof(*s->rcp_h_buf));

  1172.     s->c_buf = av_malloc_array(s->width, sizeof(*s->c_buf));

  1173.     if (!s->h_buf || !s->rcp_h_buf || !s->c_buf)

  1174.         return AVERROR(ENOMEM);

  1175. 

  1176.     s->sono_count = 0;

  1177.     s->next_pts = 0;

  1178.     s->sono_idx = 0;

  1179.     s->remaining_fill = s->fft_len / 2;

  1180.     s->remaining_frac = 0;

  1181.     s->step_frac = av_div_q(av_make_q(inlink->sample_rate, s->count) , s->rate);

  1182.     s->step = (int)(s->step_frac.num / s->step_frac.den);

  1183.     s->step_frac.num %= s->step_frac.den;

  1184.     if (s->step_frac.num) {

  1185.         av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d + %d/%d.\n",

  1186.                inlink->sample_rate, s->step, s->step_frac.num, s->step_frac.den);

  1187.         av_log(ctx, AV_LOG_WARNING, "fractional step.\n");

  1188.     } else {

  1189.         av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d.\n",

  1190.                inlink->sample_rate, s->step);

  1191.     }

  1192. 

  1193.     return 0;

  1194. }

  1195. 

  1196. 

  1197. static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)

  1198. {

  1199.     AVFilterContext *ctx = inlink->dst;

  1200.     AVFilterLink *outlink = ctx->outputs[0];

  1201.     ShowCQTContext *s = ctx->priv;

  1202.     int remaining, step, ret, x, i, j, m;

  1203.     float *audio_data;

  1204.     AVFrame *out = NULL;

  1205. 

  1206.     if (!insamples) {

  1207.         while (s->remaining_fill < s->fft_len / 2) {

  1208.             memset(&s->fft_data[s->fft_len - s->remaining_fill], 0, sizeof(*s->fft_data) * s->remaining_fill);

  1209.             ret = plot_cqt(ctx, &out);

  1210.             if (ret < 0)

  1211.                 return ret;

  1212. 

  1213.             step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;

  1214.             s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;

  1215.             for (x = 0; x < (s->fft_len-step); x++)

  1216.                 s->fft_data[x] = s->fft_data[x+step];

  1217.             s->remaining_fill += step;

  1218. 

  1219.             if (out)

  1220.                 return ff_filter_frame(outlink, out);

  1221.         }

  1222.         return AVERROR_EOF;

  1223.     }

  1224. 

  1225.     remaining = insamples->nb_samples;

  1226.     audio_data = (float*) insamples->data[0];

  1227. 

  1228.     while (remaining) {

  1229.         i = insamples->nb_samples - remaining;

  1230.         j = s->fft_len - s->remaining_fill;

  1231.         if (remaining >= s->remaining_fill) {

  1232.             for (m = 0; m < s->remaining_fill; m++) {

  1233.                 s->fft_data[j+m].re = audio_data[2*(i+m)];

  1234.                 s->fft_data[j+m].im = audio_data[2*(i+m)+1];

  1235.             }

  1236.             ret = plot_cqt(ctx, &out);

  1237.             if (ret < 0) {

  1238.                 av_frame_free(&insamples);

  1239.                 return ret;

  1240.             }

  1241.             remaining -= s->remaining_fill;

  1242.             if (out) {

  1243.                 int64_t pts = av_rescale_q(insamples->pts, inlink->time_base, av_make_q(1, inlink->sample_rate));

  1244.                 pts += insamples->nb_samples - remaining - s->fft_len/2;

  1245.                 pts = av_rescale_q(pts, av_make_q(1, inlink->sample_rate), outlink->time_base);

  1246.                 if (FFABS(pts - out->pts) > PTS_TOLERANCE) {

  1247.                     av_log(ctx, AV_LOG_DEBUG, "changing pts from %"PRId64" (%.3f) to %"PRId64" (%.3f).\n",

  1248.                            out->pts, out->pts * av_q2d(outlink->time_base),

  1249.                            pts, pts * av_q2d(outlink->time_base));

  1250.                     out->pts = pts;

  1251.                     s->next_pts = pts + PTS_STEP;

  1252.                 }

  1253.                 ret = ff_filter_frame(outlink, out);

  1254.                 if (ret < 0) {

  1255.                     av_frame_free(&insamples);

  1256.                     return ret;

  1257.                 }

  1258.                 out = NULL;

  1259.             }

  1260.             step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;

  1261.             s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;

  1262.             for (m = 0; m < s->fft_len-step; m++)

  1263.                 s->fft_data[m] = s->fft_data[m+step];

  1264.             s->remaining_fill = step;

  1265.         } else {

  1266.             for (m = 0; m < remaining; m++) {

  1267.                 s->fft_data[j+m].re = audio_data[2*(i+m)];

  1268.                 s->fft_data[j+m].im = audio_data[2*(i+m)+1];

  1269.             }

  1270.             s->remaining_fill -= remaining;

  1271.             remaining = 0;

  1272.         }

  1273.     }

  1274.     av_frame_free(&insamples);

  1275.     return 0;

  1276. }

  1277. 

  1278. static int request_frame(AVFilterLink *outlink)

  1279. {

  1280.     AVFilterLink *inlink = outlink->src->inputs[0];

  1281.     int ret;

  1282. 

  1283.     ret = ff_request_frame(inlink);

  1284.     if (ret == AVERROR_EOF)

  1285.         ret = filter_frame(inlink, NULL);

  1286.     return ret;

  1287. }

  1288. 

  1289. static const AVFilterPad showcqt_inputs[] = {

  1290.     {

  1291.         .name         = "default",

  1292.         .type         = AVMEDIA_TYPE_AUDIO,

  1293.         .filter_frame = filter_frame,

  1294.     },

  1295.     { NULL }

  1296. };

  1297. 

  1298. static const AVFilterPad showcqt_outputs[] = {

  1299.     {

  1300.         .name          = "default",

  1301.         .type          = AVMEDIA_TYPE_VIDEO,

  1302.         .config_props  = config_output,

  1303.         .request_frame = request_frame,

  1304.     },

  1305.     { NULL }

  1306. };

  1307. 

  1308. AVFilter ff_avf_showcqt = {

  1309.     .name          = "showcqt",

  1310.     .description   = NULL_IF_CONFIG_SMALL("Convert input audio to a CQT (Constant/Clamped Q Transform) spectrum video output."),

  1311.     .init          = init,

  1312.     .uninit        = uninit,

  1313.     .query_formats = query_formats,

  1314.     .priv_size     = sizeof(ShowCQTContext),

  1315.     .inputs        = showcqt_inputs,

  1316.     .outputs       = showcqt_outputs,

  1317.     .priv_class    = &showcqt_class,

  1318. };