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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 "libavutil/time.h"

  29. #include "avfilter.h"

  30. #include "internal.h"

  31. #include "lavfutils.h"

  32. #include "lswsutils.h"

  33. 

  34. #if CONFIG_LIBFREETYPE

  35. #include <ft2build.h>

  36. #include FT_FREETYPE_H

  37. #endif

  38. 

  39. #if CONFIG_LIBFONTCONFIG

  40. #include <fontconfig/fontconfig.h>

  41. #endif

  42. 

  43. #include "avf_showcqt.h"

  44. 

  45. #define BASEFREQ        20.01523126408007475

  46. #define ENDFREQ         20495.59681441799654

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

  48. #define TLENGTH_MIN     0.001

  49. #define VOLUME_MAX      100.0

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

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

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

  53. #define CSCHEME         "1|0.5|0|0|0.5|1"

  54. #define PTS_STEP 10

  55. #define PTS_TOLERANCE 1

  56. 

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

  58. #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM)

  59. 

  60. static const AVOption showcqt_options[] = {

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

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

  63.     { "fps",          "set video rate", OFFSET(rate),  AV_OPT_TYPE_VIDEO_RATE, { .str = "25" },             1, 1000,     FLAGS },

  64.     { "rate",         "set video rate", OFFSET(rate),  AV_OPT_TYPE_VIDEO_RATE, { .str = "25" },             1, 1000,     FLAGS },

  65.     { "r",            "set video rate", OFFSET(rate),  AV_OPT_TYPE_VIDEO_RATE, { .str = "25" },             1, 1000,     FLAGS },

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  92.     { "csp",         "set color space", OFFSET(csp),          AV_OPT_TYPE_INT, { .i64 = AVCOL_SPC_UNSPECIFIED }, 0, INT_MAX, FLAGS, "csp" },

  93.         { "unspecified", "unspecified", 0,                  AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_UNSPECIFIED }, 0, 0, FLAGS, "csp" },

  94.         { "bt709",             "bt709", 0,                  AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT709 },       0, 0, FLAGS, "csp" },

  95.         { "fcc",                 "fcc", 0,                  AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_FCC },         0, 0, FLAGS, "csp" },

  96.         { "bt470bg",         "bt470bg", 0,                  AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT470BG },     0, 0, FLAGS, "csp" },

  97.         { "smpte170m",     "smpte170m", 0,                  AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_SMPTE170M },   0, 0, FLAGS, "csp" },

  98.         { "smpte240m",     "smpte240m", 0,                  AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_SMPTE240M },   0, 0, FLAGS, "csp" },

  99.         { "bt2020ncl",     "bt2020ncl", 0,                  AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT2020_NCL },  0, 0, FLAGS, "csp" },

  100.     { "cscheme",    "set color scheme", OFFSET(cscheme),   AV_OPT_TYPE_STRING, { .str = CSCHEME },   CHAR_MIN, CHAR_MAX, FLAGS },

  101.     { NULL }

  102. };

  103. 

  104. AVFILTER_DEFINE_CLASS(showcqt);

  105. 

  106. static void common_uninit(ShowCQTContext *s)

  107. {

  108.     int k;

  109.     int level = AV_LOG_DEBUG;

  110.     int64_t plot_time;

  111. 

  112.     if (s->fft_time)

  113.         av_log(s->ctx, level, "fft_time         = %16.3f s.\n", s->fft_time * 1e-6);

  114.     if (s->cqt_time)

  115.         av_log(s->ctx, level, "cqt_time         = %16.3f s.\n", s->cqt_time * 1e-6);

  116.     if (s->process_cqt_time)

  117.         av_log(s->ctx, level, "process_cqt_time = %16.3f s.\n", s->process_cqt_time * 1e-6);

  118.     if (s->update_sono_time)

  119.         av_log(s->ctx, level, "update_sono_time = %16.3f s.\n", s->update_sono_time * 1e-6);

  120.     if (s->alloc_time)

  121.         av_log(s->ctx, level, "alloc_time       = %16.3f s.\n", s->alloc_time * 1e-6);

  122.     if (s->bar_time)

  123.         av_log(s->ctx, level, "bar_time         = %16.3f s.\n", s->bar_time * 1e-6);

  124.     if (s->axis_time)

  125.         av_log(s->ctx, level, "axis_time        = %16.3f s.\n", s->axis_time * 1e-6);

  126.     if (s->sono_time)

  127.         av_log(s->ctx, level, "sono_time        = %16.3f s.\n", s->sono_time * 1e-6);

  128. 

  129.     plot_time = s->fft_time + s->cqt_time + s->process_cqt_time + s->update_sono_time

  130.               + s->alloc_time + s->bar_time + s->axis_time + s->sono_time;

  131.     if (plot_time)

  132.         av_log(s->ctx, level, "plot_time        = %16.3f s.\n", plot_time * 1e-6);

  133. 

  134.     s->fft_time = s->cqt_time = s->process_cqt_time = s->update_sono_time

  135.                 = s->alloc_time = s->bar_time = s->axis_time = s->sono_time = 0;

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

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

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

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

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

  141.     }

  142. 

  143.     av_frame_free(&s->axis_frame);

  144.     av_frame_free(&s->sono_frame);

  145.     av_fft_end(s->fft_ctx);

  146.     s->fft_ctx = NULL;

  147.     if (s->coeffs)

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

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

  150.     av_freep(&s->coeffs);

  151.     av_freep(&s->fft_data);

  152.     av_freep(&s->fft_result);

  153.     av_freep(&s->cqt_result);

  154.     av_freep(&s->c_buf);

  155.     av_freep(&s->h_buf);

  156.     av_freep(&s->rcp_h_buf);

  157.     av_freep(&s->freq);

  158.     av_freep(&s->sono_v_buf);

  159.     av_freep(&s->bar_v_buf);

  160. }

  161. 

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

  163. {

  164.     double log_base, log_end;

  165.     double rcp_n = 1.0 / n;

  166.     double *freq;

  167.     int x;

  168. 

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

  170.     if (!freq)

  171.         return NULL;

  172. 

  173.     log_base = log(base);

  174.     log_end  = log(end);

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

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

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

  178.     }

  179.     return freq;

  180. }

  181. 

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

  183.                             double val, double min, double max,

  184.                             double nan_replace, int idx)

  185. {

  186.     int level = AV_LOG_WARNING;

  187.     if (isnan(val)) {

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

  189.                idx, name, nan_replace);

  190.         val = nan_replace;

  191.     } else if (val < min) {

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

  193.                idx, name, val, min);

  194.         val = min;

  195.     } else if (val > max) {

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

  197.                idx, name, val, max);

  198.         val = max;

  199.     }

  200.     return val;

  201. }

  202. 

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

  204. {

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

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

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

  208.     return ret;

  209. }

  210. 

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

  212. {

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

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

  215.     return ret;

  216. }

  217. 

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

  219. {

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

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

  222.     return ret;

  223. }

  224. 

  225. static int init_volume(ShowCQTContext *s)

  226. {

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

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

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

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

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

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

  233. 

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

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

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

  237.         goto error;

  238. 

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

  240.         goto error;

  241. 

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

  243.         goto error;

  244. 

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

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

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

  248.         vars[5] = vol;

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

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

  251.         vars[5] = vol;

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

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

  254.     }

  255.     av_expr_free(sono);

  256.     av_expr_free(bar);

  257.     return 0;

  258. 

  259. error:

  260.     av_freep(&s->sono_v_buf);

  261.     av_freep(&s->bar_v_buf);

  262.     av_expr_free(sono);

  263.     av_expr_free(bar);

  264.     return ret;

  265. }

  266. 

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

  268.                      int len, int fft_len)

  269. {

  270.     int k, x, i, j;

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

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

  273. 

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

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

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

  277.             j = fft_len - i;

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

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

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

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

  282.         }

  283. 

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

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

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

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

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

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

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

  291.     }

  292. }

  293. 

  294. static int init_cqt(ShowCQTContext *s)

  295. {

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

  297.     AVExpr *expr = NULL;

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

  299.     int nb_cqt_coeffs = 0;

  300.     int k, x, ret;

  301. 

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

  303.         goto error;

  304. 

  305.     ret = AVERROR(ENOMEM);

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

  307.         goto error;

  308. 

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

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

  311.         double flen, center, tlength;

  312.         int start, end, m = k;

  313. 

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

  315.             continue;

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

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

  318. 

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

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

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

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

  323. 

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

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

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

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

  328.             goto error;

  329. 

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

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

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

  333.             /* nuttall window */

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

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

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

  337.         }

  338. 

  339.         if (s->permute_coeffs)

  340.             s->permute_coeffs(s->coeffs[m].val, s->coeffs[m].len);

  341.     }

  342. 

  343.     av_expr_free(expr);

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

  345.     return 0;

  346. 

  347. error:

  348.     av_expr_free(expr);

  349.     if (s->coeffs)

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

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

  352.     av_freep(&s->coeffs);

  353.     return ret;

  354. }

  355. 

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

  357. {

  358.     AVFrame *out;

  359.     out = av_frame_alloc();

  360.     if (!out)

  361.         return NULL;

  362.     out->format = format;

  363.     out->width = w;

  364.     out->height = h;

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

  366.         av_frame_free(&out);

  367.         return NULL;

  368.     }

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

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

  371.     } else {

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

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

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

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

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

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

  378.     }

  379.     return out;

  380. }

  381. 

  382. static enum AVPixelFormat convert_axis_pixel_format(enum AVPixelFormat format)

  383. {

  384.     switch (format) {

  385.         case AV_PIX_FMT_RGB24:   format = AV_PIX_FMT_RGBA; break;

  386.         case AV_PIX_FMT_YUV444P:

  387.         case AV_PIX_FMT_YUV422P:

  388.         case AV_PIX_FMT_YUV420P: format = AV_PIX_FMT_YUVA444P; break;

  389.     }

  390.     return format;

  391. }

  392. 

  393. static int init_axis_empty(ShowCQTContext *s)

  394. {

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

  396.         return AVERROR(ENOMEM);

  397.     return 0;

  398. }

  399. 

  400. static int init_axis_from_file(ShowCQTContext *s)

  401. {

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

  403.     int tmp_linesize[4];

  404.     enum AVPixelFormat tmp_format;

  405.     int tmp_w, tmp_h, ret;

  406. 

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

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

  409.         goto error;

  410. 

  411.     ret = AVERROR(ENOMEM);

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

  413.         goto error;

  414. 

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

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

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

  418.         goto error;

  419. 

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

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

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

  423.     av_freep(tmp_data);

  424.     return 0;

  425. 

  426. error:

  427.     av_frame_free(&s->axis_frame);

  428.     av_freep(tmp_data);

  429.     return ret;

  430. }

  431. 

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

  433. {

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

  435. }

  436. 

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

  438. {

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

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

  441. }

  442. 

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

  444. {

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

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

  447. }

  448. 

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

  450. {

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

  452.     return lrint(x*255.0);

  453. }

  454. 

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

  456. {

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

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

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

  460.     AVExpr *expr = NULL;

  461.     double *freq = NULL;

  462.     int x, xs, y, ret;

  463.     int width = half ? 1920/2 : 1920, height = half ? 16 : 32;

  464.     int step = half ? 2 : 1;

  465. 

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

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

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

  469.         return AVERROR(EINVAL);

  470.     }

  471. 

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

  473.         freq = s->freq;

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

  475.         return AVERROR(ENOMEM);

  476. 

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

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

  479.             av_freep(&freq);

  480.         return ret;

  481.     }

  482. 

  483.     for (x = 0, xs = 0; x < width; x++, xs += step) {

  484.         double vars[] = { s->timeclamp, s->timeclamp, freq[xs], freq[xs], freq[xs] };

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

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

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

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

  489.         for (y = 0; y < height; y++) {

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

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

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

  493.         }

  494.     }

  495. 

  496.     av_expr_free(expr);

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

  498.         av_freep(&freq);

  499.     return 0;

  500. }

  501. 

  502. static int render_freetype(ShowCQTContext *s, AVFrame *tmp, char *fontfile)

  503. {

  504. #if CONFIG_LIBFREETYPE

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

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

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

  508.     FT_Library lib = NULL;

  509.     FT_Face face = NULL;

  510.     int font_width = 16, font_height = 32;

  511.     int font_repeat = font_width * 12;

  512.     int linear_hori_advance = font_width * 65536;

  513.     int non_monospace_warning = 0;

  514.     int x;

  515. 

  516.     if (!fontfile)

  517.         return AVERROR(EINVAL);

  518. 

  519.     if (FT_Init_FreeType(&lib))

  520.         goto fail;

  521. 

  522.     if (FT_New_Face(lib, fontfile, 0, &face))

  523.         goto fail;

  524. 

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

  526.         goto fail;

  527. 

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

  529.         goto fail;

  530. 

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

  532.         goto fail;

  533. 

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

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

  536. 

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

  538.             continue;

  539. 

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

  541.             goto fail;

  542. 

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

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

  545.             non_monospace_warning = 1;

  546.         }

  547. 

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

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

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

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

  552.                 dy = by + sy;

  553.                 if (dy < 0)

  554.                     continue;

  555.                 if (dy >= font_height)

  556.                     break;

  557. 

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

  559.                     dx = bx + sx;

  560.                     if (dx < 0)

  561.                         continue;

  562.                     if (dx >= 1920)

  563.                         break;

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

  565.                 }

  566.             }

  567.         }

  568.     }

  569. 

  570.     FT_Done_Face(face);

  571.     FT_Done_FreeType(lib);

  572.     return 0;

  573. 

  574. fail:

  575.     av_log(s->ctx, AV_LOG_WARNING, "error while loading freetype font.\n");

  576.     FT_Done_Face(face);

  577.     FT_Done_FreeType(lib);

  578.     return AVERROR(EINVAL);

  579. #else

  580.     if (fontfile)

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

  582.     return AVERROR(EINVAL);

  583. #endif

  584. }

  585. 

  586. static int render_fontconfig(ShowCQTContext *s, AVFrame *tmp, char* font)

  587. {

  588. #if CONFIG_LIBFONTCONFIG

  589.     FcConfig *fontconfig;

  590.     FcPattern *pat, *best;

  591.     FcResult result = FcResultMatch;

  592.     char *filename;

  593.     int i, ret;

  594. 

  595.     if (!font)

  596.         return AVERROR(EINVAL);

  597. 

  598.     for (i = 0; font[i]; i++) {

  599.         if (font[i] == '|')

  600.             font[i] = ':';

  601.     }

  602. 

  603.     if (!(fontconfig = FcInitLoadConfigAndFonts())) {

  604.         av_log(s->ctx, AV_LOG_ERROR, "impossible to init fontconfig.\n");

  605.         return AVERROR_UNKNOWN;

  606.     }

  607. 

  608.     if (!(pat = FcNameParse((uint8_t *)font))) {

  609.         av_log(s->ctx, AV_LOG_ERROR, "could not parse fontconfig pat.\n");

  610.         FcConfigDestroy(fontconfig);

  611.         return AVERROR(EINVAL);

  612.     }

  613. 

  614.     FcDefaultSubstitute(pat);

  615. 

  616.     if (!FcConfigSubstitute(fontconfig, pat, FcMatchPattern)) {

  617.         av_log(s->ctx, AV_LOG_ERROR, "could not substitue fontconfig options.\n");

  618.         FcPatternDestroy(pat);

  619.         FcConfigDestroy(fontconfig);

  620.         return AVERROR(ENOMEM);

  621.     }

  622. 

  623.     best = FcFontMatch(fontconfig, pat, &result);

  624.     FcPatternDestroy(pat);

  625. 

  626.     ret = AVERROR(EINVAL);

  627.     if (!best || result != FcResultMatch) {

  628.         av_log(s->ctx, AV_LOG_ERROR, "cannot find a valid font for %s.\n", font);

  629.         goto fail;

  630.     }

  631. 

  632.     if (FcPatternGetString(best, FC_FILE, 0, (FcChar8 **)&filename) != FcResultMatch) {

  633.         av_log(s->ctx, AV_LOG_ERROR, "no file path for %s\n", font);

  634.         goto fail;

  635.     }

  636. 

  637.     ret = render_freetype(s, tmp, filename);

  638. 

  639. fail:

  640.     FcPatternDestroy(best);

  641.     FcConfigDestroy(fontconfig);

  642.     return ret;

  643. #else

  644.     if (font)

  645.         av_log(s->ctx, AV_LOG_WARNING, "fontconfig is not available, ignoring font option.\n");

  646.     return AVERROR(EINVAL);

  647. #endif

  648. }

  649. 

  650. static int render_default_font(AVFrame *tmp)

  651. {

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

  653.     int x, u, v, mask;

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

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

  656.     int width = 1920/2, height = 16;

  657. 

  658.     for (x = 0; x < width; x += width/10) {

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

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

  661.             for (v = 0; v < height; v++) {

  662.                 uint8_t *p = startptr + v * linesize + height/2 * 4 * u;

  663.                 for (mask = 0x80; mask; mask >>= 1, p += 4) {

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

  665.                         p[3] = 255;

  666.                     else

  667.                         p[3] = 0;

  668.                 }

  669.             }

  670.         }

  671.     }

  672. 

  673.     return 0;

  674. }

  675. 

  676. static int init_axis_from_font(ShowCQTContext *s)

  677. {

  678.     AVFrame *tmp = NULL;

  679.     int ret = AVERROR(ENOMEM);

  680.     int width = 1920, height = 32;

  681.     int default_font = 0;

  682. 

  683.     if (!(tmp = alloc_frame_empty(AV_PIX_FMT_RGBA, width, height)))

  684.         goto fail;

  685. 

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

  687.         goto fail;

  688. 

  689.     if (render_freetype(s, tmp, s->fontfile) < 0 &&

  690.         render_fontconfig(s, tmp, s->font) < 0 &&

  691.         (default_font = 1, ret = render_default_font(tmp)) < 0)

  692.         goto fail;

  693. 

  694.     if (default_font)

  695.         width /= 2, height /= 2;

  696. 

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

  698.         goto fail;

  699. 

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

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

  702.                               width, height, AV_PIX_FMT_RGBA, s->ctx)) < 0)

  703.         goto fail;

  704. 

  705.     av_frame_free(&tmp);

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

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

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

  709.     return 0;

  710. 

  711. fail:

  712.     av_frame_free(&tmp);

  713.     av_frame_free(&s->axis_frame);

  714.     return ret;

  715. }

  716. 

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

  718. {

  719.     if (g == 1.0f)

  720.         return v;

  721.     if (g == 2.0f)

  722.         return sqrtf(v);

  723.     if (g == 3.0f)

  724.         return cbrtf(v);

  725.     if (g == 4.0f)

  726.         return sqrtf(sqrtf(v));

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

  728. }

  729. 

  730. static void rgb_from_cqt(ColorFloat *c, const FFTComplex *v, float g, int len, float cscheme[6])

  731. {

  732.     int x;

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

  734.         c[x].rgb.r = 255.0f * calculate_gamma(FFMIN(1.0f, cscheme[0] * v[x].re + cscheme[3] * v[x].im), g);

  735.         c[x].rgb.g = 255.0f * calculate_gamma(FFMIN(1.0f, cscheme[1] * v[x].re + cscheme[4] * v[x].im), g);

  736.         c[x].rgb.b = 255.0f * calculate_gamma(FFMIN(1.0f, cscheme[2] * v[x].re + cscheme[5] * v[x].im), g);

  737.     }

  738. }

  739. 

  740. static void yuv_from_cqt(ColorFloat *c, const FFTComplex *v, float gamma, int len, float cm[3][3], float cscheme[6])

  741. {

  742.     int x;

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

  744.         float r, g, b;

  745.         r = calculate_gamma(FFMIN(1.0f, cscheme[0] * v[x].re + cscheme[3] * v[x].im), gamma);

  746.         g = calculate_gamma(FFMIN(1.0f, cscheme[1] * v[x].re + cscheme[4] * v[x].im), gamma);

  747.         b = calculate_gamma(FFMIN(1.0f, cscheme[2] * v[x].re + cscheme[5] * v[x].im), gamma);

  748.         c[x].yuv.y = cm[0][0] * r + cm[0][1] * g + cm[0][2] * b;

  749.         c[x].yuv.u = cm[1][0] * r + cm[1][1] * g + cm[1][2] * b;

  750.         c[x].yuv.v = cm[2][0] * r + cm[2][1] * g + cm[2][2] * b;

  751.     }

  752. }

  753. 

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

  755.                          const ColorFloat *c, int bar_h)

  756. {

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

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

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

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

  761. 

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

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

  764.         lp = v + y * ls;

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

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

  767.                 *lp++ = 0;

  768.                 *lp++ = 0;

  769.                 *lp++ = 0;

  770.             } else {

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

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

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

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

  775.             }

  776.         }

  777.     }

  778. }

  779. 

  780. #define DRAW_BAR_WITH_CHROMA(x) \

  781. do { \

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

  783.         *lpy++ = 16; \

  784.         *lpu++ = 128; \

  785.         *lpv++ = 128; \

  786.     } else { \

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

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

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

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

  791.     } \

  792. } while (0)

  793. 

  794. #define DRAW_BAR_WITHOUT_CHROMA(x) \

  795. do { \

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

  797.         *lpy++ = 16; \

  798.     } else { \

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

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

  801.     } \

  802. } while (0)

  803. 

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

  805.                          const ColorFloat *c, int bar_h)

  806. {

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

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

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

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

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

  812.     int fmt = out->format;

  813. 

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

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

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

  817.         lpy = vy + y * lsy;

  818.         lpu = vu + yh * lsu;

  819.         lpv = vv + yh * lsv;

  820.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  822.                 DRAW_BAR_WITH_CHROMA(x);

  823.                 DRAW_BAR_WITH_CHROMA(x+1);

  824.             }

  825.         } else {

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

  827.                 DRAW_BAR_WITH_CHROMA(x);

  828.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  829.             }

  830.         }

  831. 

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

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

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

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

  836.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  838.                 DRAW_BAR_WITH_CHROMA(x);

  839.                 DRAW_BAR_WITH_CHROMA(x+1);

  840.             }

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

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

  843.                 DRAW_BAR_WITH_CHROMA(x);

  844.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  845.             }

  846.         } else {

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

  848.                 DRAW_BAR_WITHOUT_CHROMA(x);

  849.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  850.             }

  851.         }

  852.     }

  853. }

  854. 

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

  856. {

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

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

  859.     uint8_t *lp, *lpa;

  860. 

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

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

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

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

  865.             if (!lpa[3]) {

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

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

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

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

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

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

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

  873.             } else {

  874.                 a = rcp_255 * lpa[3];

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

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

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

  878.             }

  879.             lpa += 4;

  880.         }

  881.     }

  882. }

  883. 

  884. #define BLEND_WITH_CHROMA(c) \

  885. do { \

  886.     if (!*lpaa) { \

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

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

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

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

  891.         *lpy = *lpay; \

  892.         *lpu = *lpau; \

  893.         *lpv = *lpav; \

  894.     } else { \

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

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

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

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

  899.     } \

  900.     lpy++; lpu++; lpv++; \

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

  902. } while (0)

  903. 

  904. #define BLEND_WITHOUT_CHROMA(c, alpha_inc) \

  905. do { \

  906.     if (!*lpaa) { \

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

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

  909.         *lpy = *lpay; \

  910.     } else { \

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

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

  913.     } \

  914.     lpy++; \

  915.     lpay++; lpaa += alpha_inc; \

  916. } while (0)

  917. 

  918. #define BLEND_CHROMA2(c) \

  919. do { \

  920.     if (!lpaa[0] && !lpaa[1]) { \

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

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

  923.     } else if (255 == lpaa[0] && 255 == lpaa[1]) { \

  924.         *lpu = *lpau; *lpv = *lpav; \

  925.     } else { \

  926.         float a0 = (0.5f/255.0f) * lpaa[0]; \

  927.         float a1 = (0.5f/255.0f) * lpaa[1]; \

  928.         float b = 1.0f - a0 - a1; \

  929.         *lpu = lrintf(a0 * lpau[0] + a1 * lpau[1] + b * (c.yuv.u + 128.0f)); \

  930.         *lpv = lrintf(a0 * lpav[0] + a1 * lpav[1] + b * (c.yuv.v + 128.0f)); \

  931.     } \

  932.     lpau += 2; lpav += 2; lpaa++; lpu++; lpv++; \

  933. } while (0)

  934. 

  935. #define BLEND_CHROMA2x2(c) \

  936. do { \

  937.     if (!lpaa[0] && !lpaa[1] && !lpaa[lsaa] && !lpaa[lsaa+1]) { \

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

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

  940.     } else if (255 == lpaa[0] && 255 == lpaa[1] && \

  941.                255 == lpaa[lsaa] && 255 == lpaa[lsaa+1]) { \

  942.         *lpu = *lpau; *lpv = *lpav; \

  943.     } else { \

  944.         float a0 = (0.25f/255.0f) * lpaa[0]; \

  945.         float a1 = (0.25f/255.0f) * lpaa[1]; \

  946.         float a2 = (0.25f/255.0f) * lpaa[lsaa]; \

  947.         float a3 = (0.25f/255.0f) * lpaa[lsaa+1]; \

  948.         float b = 1.0f - a0 - a1 - a2 - a3; \

  949.         *lpu = lrintf(a0 * lpau[0] + a1 * lpau[1] + a2 * lpau[lsau] + a3 * lpau[lsau+1] \

  950.                     + b * (c.yuv.u + 128.0f)); \

  951.         *lpv = lrintf(a0 * lpav[0] + a1 * lpav[1] + a2 * lpav[lsav] + a3 * lpav[lsav+1] \

  952.                     + b * (c.yuv.v + 128.0f)); \

  953.     } \

  954.     lpau += 2; lpav += 2; lpaa++; lpu++; lpv++; \

  955. } while (0)

  956. 

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

  958. {

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

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

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

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

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

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

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

  966. 

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

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

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

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

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

  972.         lpay = vay + y * lsay;

  973.         lpau = vau + y * lsau;

  974.         lpav = vav + y * lsav;

  975.         lpaa = vaa + y * lsaa;

  976.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  978.                 BLEND_WITH_CHROMA(c[x]);

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

  980.             }

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

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

  983.                 BLEND_WITHOUT_CHROMA(c[x], 0);

  984.                 BLEND_CHROMA2(c[x]);

  985.                 BLEND_WITHOUT_CHROMA(c[x+1], 1);

  986.             }

  987.         } else {

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

  989.                 BLEND_WITHOUT_CHROMA(c[x], 0);

  990.                 BLEND_CHROMA2x2(c[x]);

  991.                 BLEND_WITHOUT_CHROMA(c[x+1], 1);

  992.             }

  993.         }

  994. 

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

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

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

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

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

  1000.         lpav = vav + (y + 1) * lsav;

  1001.         lpaa = vaa + (y + 1) * lsaa;

  1002.         if (fmt == AV_PIX_FMT_YUV444P) {

  1003.             for (x = 0; x < w; x += 2) {

  1004.                 BLEND_WITH_CHROMA(c[x]);

  1005.                 BLEND_WITH_CHROMA(c[x+1]);

  1006.             }

  1007.         } else if (fmt == AV_PIX_FMT_YUV422P) {

  1008.             for (x = 0; x < w; x += 2) {

  1009.                 BLEND_WITHOUT_CHROMA(c[x], 0);

  1010.                 BLEND_CHROMA2(c[x]);

  1011.                 BLEND_WITHOUT_CHROMA(c[x+1], 1);

  1012.             }

  1013.         } else {

  1014.             for (x = 0; x < w; x += 2) {

  1015.                 BLEND_WITHOUT_CHROMA(c[x], 1);

  1016.                 BLEND_WITHOUT_CHROMA(c[x+1], 1);

  1017.             }

  1018.         }

  1019.     }

  1020. }

  1021. 

  1022. static void draw_sono(AVFrame *out, AVFrame *sono, int off, int idx)

  1023. {

  1024.     int fmt = out->format, h = sono->height;

  1025.     int nb_planes = (fmt == AV_PIX_FMT_RGB24) ? 1 : 3;

  1026.     int offh = (fmt == AV_PIX_FMT_YUV420P) ? off / 2 : off;

  1027.     int inc = (fmt == AV_PIX_FMT_YUV420P) ? 2 : 1;

  1028.     int ls, i, y, yh;

  1029. 

  1030.     ls = FFMIN(out->linesize[0], sono->linesize[0]);

  1031.     for (y = 0; y < h; y++) {

  1032.         memcpy(out->data[0] + (off + y) * out->linesize[0],

  1033.                sono->data[0] + (idx + y) % h * sono->linesize[0], ls);

  1034.     }

  1035. 

  1036.     for (i = 1; i < nb_planes; i++) {

  1037.         ls = FFMIN(out->linesize[i], sono->linesize[i]);

  1038.         for (y = 0; y < h; y += inc) {

  1039.             yh = (fmt == AV_PIX_FMT_YUV420P) ? y / 2 : y;

  1040.             memcpy(out->data[i] + (offh + yh) * out->linesize[i],

  1041.                    sono->data[i] + (idx + y) % h * sono->linesize[i], ls);

  1042.         }

  1043.     }

  1044. }

  1045. 

  1046. static void update_sono_rgb(AVFrame *sono, const ColorFloat *c, int idx)

  1047. {

  1048.     int x, w = sono->width;

  1049.     uint8_t *lp = sono->data[0] + idx * sono->linesize[0];

  1050. 

  1051.     for (x = 0; x < w; x++) {

  1052.         *lp++ = lrintf(c[x].rgb.r);

  1053.         *lp++ = lrintf(c[x].rgb.g);

  1054.         *lp++ = lrintf(c[x].rgb.b);

  1055.     }

  1056. }

  1057. 

  1058. static void update_sono_yuv(AVFrame *sono, const ColorFloat *c, int idx)

  1059. {

  1060.     int x, fmt = sono->format, w = sono->width;

  1061.     uint8_t *lpy = sono->data[0] + idx * sono->linesize[0];

  1062.     uint8_t *lpu = sono->data[1] + idx * sono->linesize[1];

  1063.     uint8_t *lpv = sono->data[2] + idx * sono->linesize[2];

  1064. 

  1065.     for (x = 0; x < w; x += 2) {

  1066.         *lpy++ = lrintf(c[x].yuv.y + 16.0f);

  1067.         *lpu++ = lrintf(c[x].yuv.u + 128.0f);

  1068.         *lpv++ = lrintf(c[x].yuv.v + 128.0f);

  1069.         *lpy++ = lrintf(c[x+1].yuv.y + 16.0f);

  1070.         if (fmt == AV_PIX_FMT_YUV444P) {

  1071.             *lpu++ = lrintf(c[x+1].yuv.u + 128.0f);

  1072.             *lpv++ = lrintf(c[x+1].yuv.v + 128.0f);

  1073.         }

  1074.     }

  1075. }

  1076. 

  1077. static void process_cqt(ShowCQTContext *s)

  1078. {

  1079.     int x, i;

  1080.     if (!s->sono_count) {

  1081.         for (x = 0; x < s->cqt_len; x++) {

  1082.             s->h_buf[x] = s->bar_v_buf[x] * 0.5f * (s->cqt_result[x].re + s->cqt_result[x].im);

  1083.         }

  1084.         if (s->fcount > 1) {

  1085.             float rcp_fcount = 1.0f / s->fcount;

  1086.             for (x = 0; x < s->width; x++) {

  1087.                 float h = 0.0f;

  1088.                 for (i = 0; i < s->fcount; i++)

  1089.                     h += s->h_buf[s->fcount * x + i];

  1090.                 s->h_buf[x] = rcp_fcount * h;

  1091.             }

  1092.         }

  1093.         for (x = 0; x < s->width; x++) {

  1094.             s->h_buf[x] = calculate_gamma(s->h_buf[x], s->bar_g);

  1095.             s->rcp_h_buf[x] = 1.0f / (s->h_buf[x] + 0.0001f);

  1096.         }

  1097.     }

  1098. 

  1099.     for (x = 0; x < s->cqt_len; x++) {

  1100.         s->cqt_result[x].re *= s->sono_v_buf[x];

  1101.         s->cqt_result[x].im *= s->sono_v_buf[x];

  1102.     }

  1103. 

  1104.     if (s->fcount > 1) {

  1105.         float rcp_fcount = 1.0f / s->fcount;

  1106.         for (x = 0; x < s->width; x++) {

  1107.             FFTComplex result = {0.0f, 0.0f};

  1108.             for (i = 0; i < s->fcount; i++) {

  1109.                 result.re += s->cqt_result[s->fcount * x + i].re;

  1110.                 result.im += s->cqt_result[s->fcount * x + i].im;

  1111.             }

  1112.             s->cqt_result[x].re = rcp_fcount * result.re;

  1113.             s->cqt_result[x].im = rcp_fcount * result.im;

  1114.         }

  1115.     }

  1116. 

  1117.     if (s->format == AV_PIX_FMT_RGB24)

  1118.         rgb_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width, s->cscheme_v);

  1119.     else

  1120.         yuv_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width, s->cmatrix, s->cscheme_v);

  1121. }

  1122. 

  1123. static int plot_cqt(AVFilterContext *ctx, AVFrame **frameout)

  1124. {

  1125.     AVFilterLink *outlink = ctx->outputs[0];

  1126.     ShowCQTContext *s = ctx->priv;

  1127.     int64_t last_time, cur_time;

  1128. 

  1129. #define UPDATE_TIME(t) \

  1130.     cur_time = av_gettime(); \

  1131.     t += cur_time - last_time; \

  1132.     last_time = cur_time

  1133. 

  1134.     last_time = av_gettime();

  1135. 

  1136.     memcpy(s->fft_result, s->fft_data, s->fft_len * sizeof(*s->fft_data));

  1137.     av_fft_permute(s->fft_ctx, s->fft_result);

  1138.     av_fft_calc(s->fft_ctx, s->fft_result);

  1139.     s->fft_result[s->fft_len] = s->fft_result[0];

  1140.     UPDATE_TIME(s->fft_time);

  1141. 

  1142.     s->cqt_calc(s->cqt_result, s->fft_result, s->coeffs, s->cqt_len, s->fft_len);

  1143.     UPDATE_TIME(s->cqt_time);

  1144. 

  1145.     process_cqt(s);

  1146.     UPDATE_TIME(s->process_cqt_time);

  1147. 

  1148.     if (s->sono_h) {

  1149.         s->update_sono(s->sono_frame, s->c_buf, s->sono_idx);

  1150.         UPDATE_TIME(s->update_sono_time);

  1151.     }

  1152. 

  1153.     if (!s->sono_count) {

  1154.         AVFrame *out = *frameout = ff_get_video_buffer(outlink, outlink->w, outlink->h);

  1155.         if (!out)

  1156.             return AVERROR(ENOMEM);

  1157.         out->sample_aspect_ratio = av_make_q(1, 1);

  1158.         av_frame_set_color_range(out, AVCOL_RANGE_MPEG);

  1159.         av_frame_set_colorspace(out, s->csp);

  1160.         UPDATE_TIME(s->alloc_time);

  1161. 

  1162.         if (s->bar_h) {

  1163.             s->draw_bar(out, s->h_buf, s->rcp_h_buf, s->c_buf, s->bar_h);

  1164.             UPDATE_TIME(s->bar_time);

  1165.         }

  1166. 

  1167.         if (s->axis_h) {

  1168.             s->draw_axis(out, s->axis_frame, s->c_buf, s->bar_h);

  1169.             UPDATE_TIME(s->axis_time);

  1170.         }

  1171. 

  1172.         if (s->sono_h) {

  1173.             s->draw_sono(out, s->sono_frame, s->bar_h + s->axis_h, s->sono_idx);

  1174.             UPDATE_TIME(s->sono_time);

  1175.         }

  1176.         out->pts = s->next_pts;

  1177.         s->next_pts += PTS_STEP;

  1178.     }

  1179.     s->sono_count = (s->sono_count + 1) % s->count;

  1180.     if (s->sono_h)

  1181.         s->sono_idx = (s->sono_idx + s->sono_h - 1) % s->sono_h;

  1182.     return 0;

  1183. }

  1184. 

  1185. static void init_colormatrix(ShowCQTContext *s)

  1186. {

  1187.     double kr, kg, kb;

  1188. 

  1189.     /* from vf_colorspace.c */

  1190.     switch (s->csp) {

  1191.     default:

  1192.         av_log(s->ctx, AV_LOG_WARNING, "unsupported colorspace, setting it to unspecified.\n");

  1193.         s->csp = AVCOL_SPC_UNSPECIFIED;

  1194.     case AVCOL_SPC_UNSPECIFIED:

  1195.     case AVCOL_SPC_BT470BG:

  1196.     case AVCOL_SPC_SMPTE170M:

  1197.         kr = 0.299; kb = 0.114; break;

  1198.     case AVCOL_SPC_BT709:

  1199.         kr = 0.2126; kb = 0.0722; break;

  1200.     case AVCOL_SPC_FCC:

  1201.         kr = 0.30; kb = 0.11; break;

  1202.     case AVCOL_SPC_SMPTE240M:

  1203.         kr = 0.212; kb = 0.087; break;

  1204.     case AVCOL_SPC_BT2020_NCL:

  1205.         kr = 0.2627; kb = 0.0593; break;

  1206.     }

  1207. 

  1208.     kg = 1.0 - kr - kb;

  1209.     s->cmatrix[0][0] = 219.0 * kr;

  1210.     s->cmatrix[0][1] = 219.0 * kg;

  1211.     s->cmatrix[0][2] = 219.0 * kb;

  1212.     s->cmatrix[1][0] = -112.0 * kr / (1.0 - kb);

  1213.     s->cmatrix[1][1] = -112.0 * kg / (1.0 - kb);

  1214.     s->cmatrix[1][2] = 112.0;

  1215.     s->cmatrix[2][0] = 112.0;

  1216.     s->cmatrix[2][1] = -112.0 * kg / (1.0 - kr);

  1217.     s->cmatrix[2][2] = -112.0 * kb / (1.0 - kr);

  1218. }

  1219. 

  1220. static int init_cscheme(ShowCQTContext *s)

  1221. {

  1222.     char tail[2];

  1223.     int k;

  1224. 

  1225.     if (sscanf(s->cscheme, " %f | %f | %f | %f | %f | %f %1s", &s->cscheme_v[0],

  1226.         &s->cscheme_v[1], &s->cscheme_v[2], &s->cscheme_v[3], &s->cscheme_v[4],

  1227.         &s->cscheme_v[5], tail) != 6)

  1228.         goto fail;

  1229. 

  1230.     for (k = 0; k < 6; k++)

  1231.         if (isnan(s->cscheme_v[k]) || s->cscheme_v[k] < 0.0f || s->cscheme_v[k] > 1.0f)

  1232.             goto fail;

  1233. 

  1234.     return 0;

  1235. 

  1236. fail:

  1237.     av_log(s->ctx, AV_LOG_ERROR, "invalid cscheme.\n");

  1238.     return AVERROR(EINVAL);

  1239. }

  1240. 

  1241. /* main filter control */

  1242. static av_cold int init(AVFilterContext *ctx)

  1243. {

  1244.     ShowCQTContext *s = ctx->priv;

  1245.     s->ctx = ctx;

  1246. 

  1247.     if (!s->fullhd) {

  1248.         av_log(ctx, AV_LOG_WARNING, "fullhd option is deprecated, use size/s option instead.\n");

  1249.         if (s->width != 1920 || s->height != 1080) {

  1250.             av_log(ctx, AV_LOG_ERROR, "fullhd set to 0 but with custom dimension.\n");

  1251.             return AVERROR(EINVAL);

  1252.         }

  1253.         s->width /= 2;

  1254.         s->height /= 2;

  1255.         s->fullhd = 1;

  1256.     }

  1257. 

  1258.     if (s->axis_h < 0) {

  1259.         s->axis_h = s->width / 60;

  1260.         if (s->axis_h & 1)

  1261.             s->axis_h++;

  1262.         if (s->bar_h >= 0 && s->sono_h >= 0)

  1263.             s->axis_h = s->height - s->bar_h - s->sono_h;

  1264.         if (s->bar_h >= 0 && s->sono_h < 0)

  1265.             s->axis_h = FFMIN(s->axis_h, s->height - s->bar_h);

  1266.         if (s->bar_h < 0 && s->sono_h >= 0)

  1267.             s->axis_h = FFMIN(s->axis_h, s->height - s->sono_h);

  1268.     }

  1269. 

  1270.     if (s->bar_h < 0) {

  1271.         s->bar_h = (s->height - s->axis_h) / 2;

  1272.         if (s->bar_h & 1)

  1273.             s->bar_h--;

  1274.         if (s->sono_h >= 0)

  1275.             s->bar_h = s->height - s->sono_h - s->axis_h;

  1276.     }

  1277. 

  1278.     if (s->sono_h < 0)

  1279.         s->sono_h = s->height - s->axis_h - s->bar_h;

  1280. 

  1281.     if ((s->width & 1) || (s->height & 1) || (s->bar_h & 1) || (s->axis_h & 1) || (s->sono_h & 1) ||

  1282.         (s->bar_h < 0) || (s->axis_h < 0) || (s->sono_h < 0) || (s->bar_h > s->height) ||

  1283.         (s->axis_h > s->height) || (s->sono_h > s->height) || (s->bar_h + s->axis_h + s->sono_h != s->height)) {

  1284.         av_log(ctx, AV_LOG_ERROR, "invalid dimension.\n");

  1285.         return AVERROR(EINVAL);

  1286.     }

  1287. 

  1288.     if (!s->fcount) {

  1289.         do {

  1290.             s->fcount++;

  1291.         } while(s->fcount * s->width < 1920 && s->fcount < 10);

  1292.     }

  1293. 

  1294.     init_colormatrix(s);

  1295. 

  1296.     return init_cscheme(s);

  1297. }

  1298. 

  1299. static av_cold void uninit(AVFilterContext *ctx)

  1300. {

  1301.     common_uninit(ctx->priv);

  1302. }

  1303. 

  1304. static int query_formats(AVFilterContext *ctx)

  1305. {

  1306.     AVFilterFormats *formats = NULL;

  1307.     AVFilterChannelLayouts *layouts = NULL;

  1308.     AVFilterLink *inlink = ctx->inputs[0];

  1309.     AVFilterLink *outlink = ctx->outputs[0];

  1310.     enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };

  1311.     enum AVPixelFormat pix_fmts[] = {

  1312.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,

  1313.         AV_PIX_FMT_YUV444P, AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE

  1314.     };

  1315.     int64_t channel_layouts[] = { AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_STEREO_DOWNMIX, -1 };

  1316.     int ret;

  1317. 

  1318.     /* set input audio formats */

  1319.     formats = ff_make_format_list(sample_fmts);

  1320.     if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)

  1321.         return ret;

  1322. 

  1323.     layouts = avfilter_make_format64_list(channel_layouts);

  1324.     if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)

  1325.         return ret;

  1326. 

  1327.     formats = ff_all_samplerates();

  1328.     if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)

  1329.         return ret;

  1330. 

  1331.     /* set output video format */

  1332.     formats = ff_make_format_list(pix_fmts);

  1333.     if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)

  1334.         return ret;

  1335. 

  1336.     return 0;

  1337. }

  1338. 

  1339. static int config_output(AVFilterLink *outlink)

  1340. {

  1341.     AVFilterContext *ctx = outlink->src;

  1342.     AVFilterLink *inlink = ctx->inputs[0];

  1343.     ShowCQTContext *s = ctx->priv;

  1344.     int ret;

  1345. 

  1346.     common_uninit(s);

  1347. 

  1348.     outlink->w = s->width;

  1349.     outlink->h = s->height;

  1350.     s->format = outlink->format;

  1351.     outlink->sample_aspect_ratio = av_make_q(1, 1);

  1352.     outlink->frame_rate = s->rate;

  1353.     outlink->time_base = av_mul_q(av_inv_q(s->rate), av_make_q(1, PTS_STEP));

  1354.     av_log(ctx, AV_LOG_INFO, "video: %dx%d %s %d/%d fps, bar_h = %d, axis_h = %d, sono_h = %d.\n",

  1355.            s->width, s->height, av_get_pix_fmt_name(s->format), s->rate.num, s->rate.den,

  1356.            s->bar_h, s->axis_h, s->sono_h);

  1357. 

  1358.     s->cqt_len = s->width * s->fcount;

  1359.     if (!(s->freq = create_freq_table(s->basefreq, s->endfreq, s->cqt_len)))

  1360.         return AVERROR(ENOMEM);

  1361. 

  1362.     if ((ret = init_volume(s)) < 0)

  1363.         return ret;

  1364. 

  1365.     s->fft_bits = ceil(log2(inlink->sample_rate * s->timeclamp));

  1366.     s->fft_len = 1 << s->fft_bits;

  1367.     av_log(ctx, AV_LOG_INFO, "fft_len = %d, cqt_len = %d.\n", s->fft_len, s->cqt_len);

  1368. 

  1369.     s->fft_ctx = av_fft_init(s->fft_bits, 0);

  1370.     s->fft_data = av_calloc(s->fft_len, sizeof(*s->fft_data));

  1371.     s->fft_result = av_calloc(s->fft_len + 64, sizeof(*s->fft_result));

  1372.     s->cqt_result = av_malloc_array(s->cqt_len, sizeof(*s->cqt_result));

  1373.     if (!s->fft_ctx || !s->fft_data || !s->fft_result || !s->cqt_result)

  1374.         return AVERROR(ENOMEM);

  1375. 

  1376.     s->cqt_align = 1;

  1377.     s->cqt_calc = cqt_calc;

  1378.     s->permute_coeffs = NULL;

  1379.     s->draw_sono = draw_sono;

  1380.     if (s->format == AV_PIX_FMT_RGB24) {

  1381.         s->draw_bar = draw_bar_rgb;

  1382.         s->draw_axis = draw_axis_rgb;

  1383.         s->update_sono = update_sono_rgb;

  1384.     } else {

  1385.         s->draw_bar = draw_bar_yuv;

  1386.         s->draw_axis = draw_axis_yuv;

  1387.         s->update_sono = update_sono_yuv;

  1388.     }

  1389. 

  1390.     if (ARCH_X86)

  1391.         ff_showcqt_init_x86(s);

  1392. 

  1393.     if ((ret = init_cqt(s)) < 0)

  1394.         return ret;

  1395. 

  1396.     if (s->axis_h) {

  1397.         if (!s->axis) {

  1398.             if ((ret = init_axis_empty(s)) < 0)

  1399.                 return ret;

  1400.         } else if (s->axisfile) {

  1401.             if (init_axis_from_file(s) < 0) {

  1402.                 av_log(ctx, AV_LOG_WARNING, "loading axis image failed, fallback to font rendering.\n");

  1403.                 if (init_axis_from_font(s) < 0) {

  1404.                     av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");

  1405.                     if ((ret = init_axis_empty(s)) < 0)

  1406.                         return ret;

  1407.                 }

  1408.             }

  1409.         } else {

  1410.             if (init_axis_from_font(s) < 0) {

  1411.                 av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");

  1412.                 if ((ret = init_axis_empty(s)) < 0)

  1413.                     return ret;

  1414.             }

  1415.         }

  1416.     }

  1417. 

  1418.     if (s->sono_h) {

  1419.         s->sono_frame = alloc_frame_empty((outlink->format == AV_PIX_FMT_YUV420P) ?

  1420.                         AV_PIX_FMT_YUV422P : outlink->format, s->width, s->sono_h);

  1421.         if (!s->sono_frame)

  1422.             return AVERROR(ENOMEM);

  1423.     }

  1424. 

  1425.     s->h_buf = av_malloc_array(s->cqt_len, sizeof (*s->h_buf));

  1426.     s->rcp_h_buf = av_malloc_array(s->width, sizeof(*s->rcp_h_buf));

  1427.     s->c_buf = av_malloc_array(s->width, sizeof(*s->c_buf));

  1428.     if (!s->h_buf || !s->rcp_h_buf || !s->c_buf)

  1429.         return AVERROR(ENOMEM);

  1430. 

  1431.     s->sono_count = 0;

  1432.     s->next_pts = 0;

  1433.     s->sono_idx = 0;

  1434.     s->remaining_fill = s->fft_len / 2;

  1435.     s->remaining_frac = 0;

  1436.     s->step_frac = av_div_q(av_make_q(inlink->sample_rate, s->count) , s->rate);

  1437.     s->step = (int)(s->step_frac.num / s->step_frac.den);

  1438.     s->step_frac.num %= s->step_frac.den;

  1439.     if (s->step_frac.num) {

  1440.         av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d + %d/%d.\n",

  1441.                inlink->sample_rate, s->step, s->step_frac.num, s->step_frac.den);

  1442.         av_log(ctx, AV_LOG_WARNING, "fractional step.\n");

  1443.     } else {

  1444.         av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d.\n",

  1445.                inlink->sample_rate, s->step);

  1446.     }

  1447. 

  1448.     return 0;

  1449. }

  1450. 

  1451. 

  1452. static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)

  1453. {

  1454.     AVFilterContext *ctx = inlink->dst;

  1455.     AVFilterLink *outlink = ctx->outputs[0];

  1456.     ShowCQTContext *s = ctx->priv;

  1457.     int remaining, step, ret, x, i, j, m;

  1458.     float *audio_data;

  1459.     AVFrame *out = NULL;

  1460. 

  1461.     if (!insamples) {

  1462.         while (s->remaining_fill < s->fft_len / 2) {

  1463.             memset(&s->fft_data[s->fft_len - s->remaining_fill], 0, sizeof(*s->fft_data) * s->remaining_fill);

  1464.             ret = plot_cqt(ctx, &out);

  1465.             if (ret < 0)

  1466.                 return ret;

  1467. 

  1468.             step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;

  1469.             s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;

  1470.             for (x = 0; x < (s->fft_len-step); x++)

  1471.                 s->fft_data[x] = s->fft_data[x+step];

  1472.             s->remaining_fill += step;

  1473. 

  1474.             if (out)

  1475.                 return ff_filter_frame(outlink, out);

  1476.         }

  1477.         return AVERROR_EOF;

  1478.     }

  1479. 

  1480.     remaining = insamples->nb_samples;

  1481.     audio_data = (float*) insamples->data[0];

  1482. 

  1483.     while (remaining) {

  1484.         i = insamples->nb_samples - remaining;

  1485.         j = s->fft_len - s->remaining_fill;

  1486.         if (remaining >= s->remaining_fill) {

  1487.             for (m = 0; m < s->remaining_fill; m++) {

  1488.                 s->fft_data[j+m].re = audio_data[2*(i+m)];

  1489.                 s->fft_data[j+m].im = audio_data[2*(i+m)+1];

  1490.             }

  1491.             ret = plot_cqt(ctx, &out);

  1492.             if (ret < 0) {

  1493.                 av_frame_free(&insamples);

  1494.                 return ret;

  1495.             }

  1496.             remaining -= s->remaining_fill;

  1497.             if (out) {

  1498.                 int64_t pts = av_rescale_q(insamples->pts, inlink->time_base, av_make_q(1, inlink->sample_rate));

  1499.                 pts += insamples->nb_samples - remaining - s->fft_len/2;

  1500.                 pts = av_rescale_q(pts, av_make_q(1, inlink->sample_rate), outlink->time_base);

  1501.                 if (FFABS(pts - out->pts) > PTS_TOLERANCE) {

  1502.                     av_log(ctx, AV_LOG_DEBUG, "changing pts from %"PRId64" (%.3f) to %"PRId64" (%.3f).\n",

  1503.                            out->pts, out->pts * av_q2d(outlink->time_base),

  1504.                            pts, pts * av_q2d(outlink->time_base));

  1505.                     out->pts = pts;

  1506.                     s->next_pts = pts + PTS_STEP;

  1507.                 }

  1508.                 ret = ff_filter_frame(outlink, out);

  1509.                 if (ret < 0) {

  1510.                     av_frame_free(&insamples);

  1511.                     return ret;

  1512.                 }

  1513.                 out = NULL;

  1514.             }

  1515.             step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;

  1516.             s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;

  1517.             for (m = 0; m < s->fft_len-step; m++)

  1518.                 s->fft_data[m] = s->fft_data[m+step];

  1519.             s->remaining_fill = step;

  1520.         } else {

  1521.             for (m = 0; m < remaining; m++) {

  1522.                 s->fft_data[j+m].re = audio_data[2*(i+m)];

  1523.                 s->fft_data[j+m].im = audio_data[2*(i+m)+1];

  1524.             }

  1525.             s->remaining_fill -= remaining;

  1526.             remaining = 0;

  1527.         }

  1528.     }

  1529.     av_frame_free(&insamples);

  1530.     return 0;

  1531. }

  1532. 

  1533. static int request_frame(AVFilterLink *outlink)

  1534. {

  1535.     AVFilterLink *inlink = outlink->src->inputs[0];

  1536.     int ret;

  1537. 

  1538.     ret = ff_request_frame(inlink);

  1539.     if (ret == AVERROR_EOF)

  1540.         ret = filter_frame(inlink, NULL);

  1541.     return ret;

  1542. }

  1543. 

  1544. static const AVFilterPad showcqt_inputs[] = {

  1545.     {

  1546.         .name         = "default",

  1547.         .type         = AVMEDIA_TYPE_AUDIO,

  1548.         .filter_frame = filter_frame,

  1549.     },

  1550.     { NULL }

  1551. };

  1552. 

  1553. static const AVFilterPad showcqt_outputs[] = {

  1554.     {

  1555.         .name          = "default",

  1556.         .type          = AVMEDIA_TYPE_VIDEO,

  1557.         .config_props  = config_output,

  1558.         .request_frame = request_frame,

  1559.     },

  1560.     { NULL }

  1561. };

  1562. 

  1563. AVFilter ff_avf_showcqt = {

  1564.     .name          = "showcqt",

  1565.     .description   = NULL_IF_CONFIG_SMALL("Convert input audio to a CQT (Constant/Clamped Q Transform) spectrum video output."),

  1566.     .init          = init,

  1567.     .uninit        = uninit,

  1568.     .query_formats = query_formats,

  1569.     .priv_size     = sizeof(ShowCQTContext),

  1570.     .inputs        = showcqt_inputs,

  1571.     .outputs       = showcqt_outputs,

  1572.     .priv_class    = &showcqt_class,

  1573. };