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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 <math.h>

  22. #include <stdlib.h>

  23. 

  24. #include "config.h"

  25. #include "libavcodec/avfft.h"

  26. #include "libavutil/avassert.h"

  27. #include "libavutil/opt.h"

  28. #include "libavutil/xga_font_data.h"

  29. #include "libavutil/eval.h"

  30. #include "libavutil/pixdesc.h"

  31. #include "avfilter.h"

  32. #include "internal.h"

  33. #include "lavfutils.h"

  34. #include "lswsutils.h"

  35. 

  36. #if CONFIG_LIBFREETYPE

  37. #include <ft2build.h>

  38. #include FT_FREETYPE_H

  39. #endif

  40. 

  41. #include "avf_showcqt.h"

  42. 

  43. #define BASEFREQ        20.01523126408007475

  44. #define ENDFREQ         20495.59681441799654

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

  46. #define TLENGTH_MIN     0.001

  47. #define VOLUME_MAX      100.0

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

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

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

  51. 

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

  53. #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM)

  54. 

  55. static const AVOption showcqt_options[] = {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  86.     { NULL }

  87. };

  88. 

  89. AVFILTER_DEFINE_CLASS(showcqt);

  90. 

  91. static void common_uninit(ShowCQTContext *s)

  92. {

  93.     int k;

  94. 

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

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

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

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

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

  100.     }

  101. 

  102.     av_frame_free(&s->axis_frame);

  103.     av_frame_free(&s->sono_frame);

  104.     av_fft_end(s->fft_ctx);

  105.     s->fft_ctx = NULL;

  106.     if (s->coeffs)

  107.         for (k = 0; k < s->cqt_len * 2; k++)

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

  109.     av_freep(&s->coeffs);

  110.     av_freep(&s->fft_data);

  111.     av_freep(&s->fft_result);

  112.     av_freep(&s->cqt_result);

  113.     av_freep(&s->c_buf);

  114.     av_freep(&s->h_buf);

  115.     av_freep(&s->rcp_h_buf);

  116.     av_freep(&s->freq);

  117.     av_freep(&s->sono_v_buf);

  118.     av_freep(&s->bar_v_buf);

  119. }

  120. 

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

  122. {

  123.     double log_base, log_end;

  124.     double rcp_n = 1.0 / n;

  125.     double *freq;

  126.     int x;

  127. 

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

  129.     if (!freq)

  130.         return NULL;

  131. 

  132.     log_base = log(base);

  133.     log_end  = log(end);

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

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

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

  137.     }

  138.     return freq;

  139. }

  140. 

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

  142.                             double val, double min, double max,

  143.                             double nan_replace, int idx)

  144. {

  145.     int level = AV_LOG_WARNING;

  146.     if (isnan(val)) {

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

  148.                idx, name, nan_replace);

  149.         val = nan_replace;

  150.     } else if (val < min) {

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

  152.                idx, name, val, min);

  153.         val = min;

  154.     } else if (val > max) {

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

  156.                idx, name, val, max);

  157.         val = max;

  158.     }

  159.     return val;

  160. }

  161. 

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

  163. {

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

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

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

  167.     return ret;

  168. }

  169. 

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

  171. {

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

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

  174.     return ret;

  175. }

  176. 

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

  178. {

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

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

  181.     return ret;

  182. }

  183. 

  184. static int init_volume(ShowCQTContext *s)

  185. {

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

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

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

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

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

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

  192. 

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

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

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

  196.         goto error;

  197. 

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

  199.         goto error;

  200. 

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

  202.         goto error;

  203. 

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

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

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

  207.         vars[5] = vol;

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

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

  210.         vars[5] = vol;

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

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

  213.     }

  214.     av_expr_free(sono);

  215.     av_expr_free(bar);

  216.     return 0;

  217. 

  218. error:

  219.     av_freep(&s->sono_v_buf);

  220.     av_freep(&s->bar_v_buf);

  221.     av_expr_free(sono);

  222.     av_expr_free(bar);

  223.     return ret;

  224. }

  225. 

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

  227.                      int len, int fft_len)

  228. {

  229.     int k, x, i, j;

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

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

  232. 

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

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

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

  236.             j = fft_len - i;

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

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

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

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

  241.         }

  242. 

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

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

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

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

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

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

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

  250.     }

  251. }

  252. 

  253. #if 0

  254. static void cqt_calc_interleave(FFTComplex *dst, const FFTComplex *src, const Coeffs *coeffs,

  255.                                 int len, int fft_len)

  256. {

  257.     int k, x, i, m;

  258. 

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

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

  261. 

  262.         m = 2 * k;

  263.         for (x = 0; x < coeffs[m].len; x++) {

  264.             FFTSample u = coeffs[m].val[x];

  265.             i = coeffs[m].start + x;

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

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

  268.         }

  269. 

  270.         m++;

  271.         for (x = 0; x < coeffs[m].len; x++) {

  272.             FFTSample u = coeffs[m].val[x];

  273.             i = coeffs[m].start + x;

  274.             b.re += u * src[i].re;

  275.             b.im += u * src[i].im;

  276.         }

  277. 

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

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

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

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

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

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

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

  285.     }

  286. }

  287. #endif

  288. 

  289. static int init_cqt(ShowCQTContext *s)

  290. {

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

  292.     AVExpr *expr = NULL;

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

  294.     int nb_cqt_coeffs = 0, nb_cqt_coeffs_r = 0;

  295.     int k, x, ret;

  296. 

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

  298.         goto error;

  299. 

  300.     ret = AVERROR(ENOMEM);

  301.     if (!(s->coeffs = av_calloc(s->cqt_len * 2, sizeof(*s->coeffs))))

  302.         goto error;

  303. 

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

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

  306.         double flen, center, tlength;

  307.         int start, end, m = (s->cqt_coeffs_type == COEFFS_TYPE_INTERLEAVE) ? (2 * k) : k;

  308. 

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

  310.             continue;

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

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

  313. 

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

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

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

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

  318. 

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

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

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

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

  323.             goto error;

  324. 

  325.         if (s->cqt_coeffs_type == COEFFS_TYPE_INTERLEAVE) {

  326.             s->coeffs[m+1].start = (s->fft_len - end) & ~(s->cqt_align - 1);

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

  328.             nb_cqt_coeffs_r += s->coeffs[m+1].len;

  329.             if (!(s->coeffs[m+1].val = av_calloc(s->coeffs[m+1].len, sizeof(*s->coeffs[m+1].val))))

  330.                 goto error;

  331.         }

  332. 

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

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

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

  336.             /* nuttall window */

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

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

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

  340.             if (s->cqt_coeffs_type == COEFFS_TYPE_INTERLEAVE)

  341.                 s->coeffs[m+1].val[(s->fft_len - x) - s->coeffs[m+1].start] = w;

  342.         }

  343.     }

  344. 

  345.     av_expr_free(expr);

  346.     if (s->cqt_coeffs_type == COEFFS_TYPE_DEFAULT)

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

  348.     else

  349.         av_log(s->ctx, AV_LOG_INFO, "nb_cqt_coeffs = {%d,%d}.\n", nb_cqt_coeffs, nb_cqt_coeffs_r);

  350.     return 0;

  351. 

  352. error:

  353.     av_expr_free(expr);

  354.     if (s->coeffs)

  355.         for (k = 0; k < s->cqt_len * 2; k++)

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

  357.     av_freep(&s->coeffs);

  358.     return ret;

  359. }

  360. 

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

  362. {

  363.     AVFrame *out;

  364.     out = av_frame_alloc();

  365.     if (!out)

  366.         return NULL;

  367.     out->format = format;

  368.     out->width = w;

  369.     out->height = h;

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

  371.         av_frame_free(&out);

  372.         return NULL;

  373.     }

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

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

  376.     } else {

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

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

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

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

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

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

  383.     }

  384.     return out;

  385. }

  386. 

  387. static enum AVPixelFormat convert_axis_pixel_format(enum AVPixelFormat format)

  388. {

  389.     switch (format) {

  390.         case AV_PIX_FMT_RGB24:   format = AV_PIX_FMT_RGBA; break;

  391.         case AV_PIX_FMT_YUV444P: format = AV_PIX_FMT_YUVA444P; break;

  392.         case AV_PIX_FMT_YUV422P: format = AV_PIX_FMT_YUVA422P; break;

  393.         case AV_PIX_FMT_YUV420P: format = AV_PIX_FMT_YUVA420P; break;

  394.     }

  395.     return format;

  396. }

  397. 

  398. static int init_axis_empty(ShowCQTContext *s)

  399. {

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

  401.         return AVERROR(ENOMEM);

  402.     return 0;

  403. }

  404. 

  405. static int init_axis_from_file(ShowCQTContext *s)

  406. {

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

  408.     int tmp_linesize[4];

  409.     enum AVPixelFormat tmp_format;

  410.     int tmp_w, tmp_h, ret;

  411. 

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

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

  414.         goto error;

  415. 

  416.     ret = AVERROR(ENOMEM);

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

  418.         goto error;

  419. 

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

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

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

  423.         goto error;

  424. 

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

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

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

  428.     av_freep(tmp_data);

  429.     return 0;

  430. 

  431. error:

  432.     av_frame_free(&s->axis_frame);

  433.     av_freep(tmp_data);

  434.     return ret;

  435. }

  436. 

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

  438. {

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

  440. }

  441. 

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

  443. {

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

  445.     return (int)(x*255.0+0.5) << 16;

  446. }

  447. 

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

  449. {

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

  451.     return (int)(x*255.0+0.5) << 8;

  452. }

  453. 

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

  455. {

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

  457.     return (int)(x*255.0+0.5);

  458. }

  459. 

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

  461. {

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

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

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

  465.     AVExpr *expr = NULL;

  466.     double *freq = NULL;

  467.     int x, y, ret;

  468. 

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

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

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

  472.         return AVERROR(EINVAL);

  473.     }

  474. 

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

  476.         freq = s->freq;

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

  478.         return AVERROR(ENOMEM);

  479. 

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

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

  482.             av_freep(&freq);

  483.         return ret;

  484.     }

  485. 

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

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

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

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

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

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

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

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

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

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

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

  497.         }

  498.     }

  499. 

  500.     av_expr_free(expr);

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

  502.         av_freep(&freq);

  503.     return 0;

  504. }

  505. 

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

  507. {

  508. #if CONFIG_LIBFREETYPE

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

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

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

  512.     FT_Library lib = NULL;

  513.     FT_Face face = NULL;

  514.     int font_width = 16, font_height = 32;

  515.     int font_repeat = font_width * 12;

  516.     int linear_hori_advance = font_width * 65536;

  517.     int non_monospace_warning = 0;

  518.     int x;

  519. 

  520.     if (!s->fontfile)

  521.         return AVERROR(EINVAL);

  522. 

  523.     if (FT_Init_FreeType(&lib))

  524.         goto fail;

  525. 

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

  527.         goto fail;

  528. 

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

  530.         goto fail;

  531. 

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

  533.         goto fail;

  534. 

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

  536.         goto fail;

  537. 

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

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

  540. 

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

  542.             continue;

  543. 

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

  545.             goto fail;

  546. 

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

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

  549.             non_monospace_warning = 1;

  550.         }

  551. 

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

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

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

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

  556.                 dy = by + sy;

  557.                 if (dy < 0)

  558.                     continue;

  559.                 if (dy >= font_height)

  560.                     break;

  561. 

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

  563.                     dx = bx + sx;

  564.                     if (dx < 0)

  565.                         continue;

  566.                     if (dx >= 1920)

  567.                         break;

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

  569.                 }

  570.             }

  571.         }

  572.     }

  573. 

  574.     FT_Done_Face(face);

  575.     FT_Done_FreeType(lib);

  576.     return 0;

  577. 

  578. fail:

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

  580.     FT_Done_Face(face);

  581.     FT_Done_FreeType(lib);

  582.     return AVERROR(EINVAL);

  583. #else

  584.     if (s->fontfile)

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

  586.     return AVERROR(EINVAL);

  587. #endif

  588. }

  589. 

  590. static int render_default_font(AVFrame *tmp)

  591. {

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

  593.     int x, u, v, mask;

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

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

  596. 

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

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

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

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

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

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

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

  604.                         p[3] = 255;

  605.                         p[7] = 255;

  606.                         p[linesize+3] = 255;

  607.                         p[linesize+7] = 255;

  608.                     }

  609.                 }

  610.             }

  611.         }

  612.     }

  613. 

  614.     return 0;

  615. }

  616. 

  617. static int init_axis_from_font(ShowCQTContext *s)

  618. {

  619.     AVFrame *tmp = NULL;

  620.     int ret = AVERROR(ENOMEM);

  621. 

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

  623.         goto fail;

  624. 

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

  626.         goto fail;

  627. 

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

  629.         goto fail;

  630. 

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

  632.         goto fail;

  633. 

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

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

  636.                               1920, 32, AV_PIX_FMT_RGBA, s->ctx)) < 0)

  637.         goto fail;

  638. 

  639.     av_frame_free(&tmp);

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

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

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

  643.     return 0;

  644. 

  645. fail:

  646.     av_frame_free(&tmp);

  647.     av_frame_free(&s->axis_frame);

  648.     return ret;

  649. }

  650. 

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

  652. {

  653.     if (g == 1.0f)

  654.         return v;

  655.     if (g == 2.0f)

  656.         return sqrtf(v);

  657.     if (g == 3.0f)

  658.         return cbrtf(v);

  659.     if (g == 4.0f)

  660.         return sqrtf(sqrtf(v));

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

  662. }

  663. 

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

  665. {

  666.     int x;

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

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

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

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

  671.     }

  672. }

  673. 

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

  675. {

  676.     int x;

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

  678.         float r, g, b;

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

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

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

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

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

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

  685.     }

  686. }

  687. 

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

  689.                          const ColorFloat *c, int bar_h)

  690. {

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

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

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

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

  695. 

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

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

  698.         lp = v + y * ls;

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

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

  701.                 *lp++ = 0;

  702.                 *lp++ = 0;

  703.                 *lp++ = 0;

  704.             } else {

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

  706.                 *lp++ = mul * c[x].rgb.r + 0.5f;

  707.                 *lp++ = mul * c[x].rgb.g + 0.5f;

  708.                 *lp++ = mul * c[x].rgb.b + 0.5f;

  709.             }

  710.         }

  711.     }

  712. }

  713. 

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

  715.                          const ColorFloat *c, int bar_h)

  716. {

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

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

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

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

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

  722.     int fmt = out->format;

  723. 

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

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

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

  727.         lpy = vy + y * lsy;

  728.         lpu = vu + yh * lsu;

  729.         lpv = vv + yh * lsv;

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

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

  732.                 *lpy++ = 16;

  733.                 *lpu++ = 128;

  734.                 *lpv++ = 128;

  735.             } else {

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

  737.                 *lpy++ = mul * c[x].yuv.y + 16.5f;

  738.                 *lpu++ = mul * c[x].yuv.u + 128.5f;

  739.                 *lpv++ = mul * c[x].yuv.v + 128.5f;

  740.             }

  741.             /* u and v are skipped on yuv422p and yuv420p */

  742.             if (fmt == AV_PIX_FMT_YUV444P) {

  743.                 if (h[x+1] <= ht) {

  744.                     *lpy++ = 16;

  745.                     *lpu++ = 128;

  746.                     *lpv++ = 128;

  747.                 } else {

  748.                     mul = (h[x+1] - ht) * rcp_h[x+1];

  749.                     *lpy++ = mul * c[x+1].yuv.y + 16.5f;

  750.                     *lpu++ = mul * c[x+1].yuv.u + 128.5f;

  751.                     *lpv++ = mul * c[x+1].yuv.v + 128.5f;

  752.                 }

  753.             } else {

  754.                 if (h[x+1] <= ht) {

  755.                     *lpy++ = 16;

  756.                 } else {

  757.                     mul = (h[x+1] - ht) * rcp_h[x+1];

  758.                     *lpy++ = mul * c[x+1].yuv.y + 16.5f;

  759.                 }

  760.             }

  761.         }

  762. 

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

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

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

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

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

  768.             /* u and v are skipped on yuv420p */

  769.             if (fmt != AV_PIX_FMT_YUV420P) {

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

  771.                     *lpy++ = 16;

  772.                     *lpu++ = 128;

  773.                     *lpv++ = 128;

  774.                 } else {

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

  776.                     *lpy++ = mul * c[x].yuv.y + 16.5f;

  777.                     *lpu++ = mul * c[x].yuv.u + 128.5f;

  778.                     *lpv++ = mul * c[x].yuv.v + 128.5f;

  779.                 }

  780.             } else {

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

  782.                     *lpy++ = 16;

  783.                 } else {

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

  785.                     *lpy++ = mul * c[x].yuv.y + 16.5f;

  786.                 }

  787.             }

  788.             /* u and v are skipped on yuv422p and yuv420p */

  789.             if (out->format == AV_PIX_FMT_YUV444P) {

  790.                 if (h[x+1] <= ht) {

  791.                     *lpy++ = 16;

  792.                     *lpu++ = 128;

  793.                     *lpv++ = 128;

  794.                 } else {

  795.                     mul = (h[x+1] - ht) * rcp_h[x+1];

  796.                     *lpy++ = mul * c[x+1].yuv.y + 16.5f;

  797.                     *lpu++ = mul * c[x+1].yuv.u + 128.5f;

  798.                     *lpv++ = mul * c[x+1].yuv.v + 128.5f;

  799.                 }

  800.             } else {

  801.                 if (h[x+1] <= ht) {

  802.                     *lpy++ = 16;

  803.                 } else {

  804.                     mul = (h[x+1] - ht) * rcp_h[x+1];

  805.                     *lpy++ = mul * c[x+1].yuv.y + 16.5f;

  806.                 }

  807.             }

  808.         }

  809.     }

  810. }

  811. 

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

  813. {

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

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

  816.     uint8_t *lp, *lpa;

  817. 

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

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

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

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

  822.             a = rcp_255 * lpa[3];

  823.             *lp++ = a * lpa[0] + (1.0f - a) * c[x].rgb.r + 0.5f;

  824.             *lp++ = a * lpa[1] + (1.0f - a) * c[x].rgb.g + 0.5f;

  825.             *lp++ = a * lpa[2] + (1.0f - a) * c[x].rgb.b + 0.5f;

  826.             lpa += 4;

  827.         }

  828.     }

  829. }

  830. 

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

  832. {

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

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

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

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

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

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

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

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

  841. 

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

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

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

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

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

  847.         lpay = vay + y * lsay;

  848.         lpau = vau + yh * lsau;

  849.         lpav = vav + yh * lsav;

  850.         lpaa = vaa + y * lsaa;

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

  852.             a = rcp_255 * (*lpaa++);

  853.             *lpy++ = a * (*lpay++) + (1.0f - a) * (c[x].yuv.y + 16.0f) + 0.5f;

  854.             *lpu++ = a * (*lpau++) + (1.0f - a) * (c[x].yuv.u + 128.0f) + 0.5f;

  855.             *lpv++ = a * (*lpav++) + (1.0f - a) * (c[x].yuv.v + 128.0f) + 0.5f;

  856.             /* u and v are skipped on yuv422p and yuv420p */

  857.             a = rcp_255 * (*lpaa++);

  858.             *lpy++ = a * (*lpay++) + (1.0f - a) * (c[x+1].yuv.y + 16.0f) + 0.5f;

  859.             if (fmt == AV_PIX_FMT_YUV444P) {

  860.                 *lpu++ = a * (*lpau++) + (1.0f - a) * (c[x+1].yuv.u + 128.0f) + 0.5f;

  861.                 *lpv++ = a * (*lpav++) + (1.0f - a) * (c[x+1].yuv.v + 128.0f) + 0.5f;

  862.             }

  863.         }

  864. 

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

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

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

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

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

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

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

  872.         for (x = 0; x < out->width; x += 2) {

  873.             /* u and v are skipped on yuv420p */

  874.             a = rcp_255 * (*lpaa++);

  875.             *lpy++ = a * (*lpay++) + (1.0f - a) * (c[x].yuv.y + 16.0f) + 0.5f;

  876.             if (fmt != AV_PIX_FMT_YUV420P) {

  877.                 *lpu++ = a * (*lpau++) + (1.0f - a) * (c[x].yuv.u + 128.0f) + 0.5f;

  878.                 *lpv++ = a * (*lpav++) + (1.0f - a) * (c[x].yuv.v + 128.0f) + 0.5f;

  879.             }

  880.             /* u and v are skipped on yuv422p and yuv420p */

  881.             a = rcp_255 * (*lpaa++);

  882.             *lpy++ = a * (*lpay++) + (1.0f - a) * (c[x+1].yuv.y + 16.0f) + 0.5f;

  883.             if (fmt == AV_PIX_FMT_YUV444P) {

  884.                 *lpu++ = a * (*lpau++) + (1.0f - a) * (c[x+1].yuv.u + 128.0f) + 0.5f;

  885.                 *lpv++ = a * (*lpav++) + (1.0f - a) * (c[x+1].yuv.v + 128.0f) + 0.5f;

  886.             }

  887.         }

  888.     }

  889. }

  890. 

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

  892. {

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

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

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

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

  897.     int ls, i, y, yh;

  898. 

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

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

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

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

  903.     }

  904. 

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

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

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

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

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

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

  911.         }

  912.     }

  913. }

  914. 

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

  916. {

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

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

  919. 

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

  921.         *lp++ = c[x].rgb.r + 0.5f;

  922.         *lp++ = c[x].rgb.g + 0.5f;

  923.         *lp++ = c[x].rgb.b + 0.5f;

  924.     }

  925. }

  926. 

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

  928. {

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

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

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

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

  933. 

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

  935.         *lpy++ = c[x].yuv.y + 16.5f;

  936.         *lpu++ = c[x].yuv.u + 128.5f;

  937.         *lpv++ = c[x].yuv.v + 128.5f;

  938.         *lpy++ = c[x+1].yuv.y + 16.5f;

  939.         if (fmt == AV_PIX_FMT_YUV444P) {

  940.             *lpu++ = c[x+1].yuv.u + 128.5f;

  941.             *lpv++ = c[x+1].yuv.v + 128.5f;

  942.         }

  943.     }

  944. }

  945. 

  946. static void process_cqt(ShowCQTContext *s)

  947. {

  948.     int x, i;

  949.     if (!s->sono_count) {

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

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

  952.         }

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

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

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

  956.                 float h = 0.0f;

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

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

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

  960.             }

  961.         }

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

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

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

  965.         }

  966.     }

  967. 

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

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

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

  971.     }

  972. 

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

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

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

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

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

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

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

  980.             }

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

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

  983.         }

  984.     }

  985. 

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

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

  988.     else

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

  990. }

  991. 

  992. static int plot_cqt(AVFilterContext *ctx)

  993. {

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

  995.     ShowCQTContext *s = ctx->priv;

  996.     int ret = 0;

  997. 

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

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

  1000.     av_fft_calc(s->fft_ctx, s->fft_result);

  1001.     s->fft_result[s->fft_len] = s->fft_result[0];

  1002.     s->cqt_calc(s->cqt_result, s->fft_result, s->coeffs, s->cqt_len, s->fft_len);

  1003.     process_cqt(s);

  1004.     if (s->sono_h)

  1005.         s->update_sono(s->sono_frame, s->c_buf, s->sono_idx);

  1006.     if (!s->sono_count) {

  1007.         AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);

  1008.         if (!out)

  1009.             return AVERROR(ENOMEM);

  1010.         if (s->bar_h)

  1011.             s->draw_bar(out, s->h_buf, s->rcp_h_buf, s->c_buf, s->bar_h);

  1012.         if (s->axis_h)

  1013.             s->draw_axis(out, s->axis_frame, s->c_buf, s->bar_h);

  1014.         if (s->sono_h)

  1015.             s->draw_sono(out, s->sono_frame, s->bar_h + s->axis_h, s->sono_idx);

  1016.         out->pts = s->frame_count;

  1017.         ret = ff_filter_frame(outlink, out);

  1018.         s->frame_count++;

  1019.     }

  1020.     s->sono_count = (s->sono_count + 1) % s->count;

  1021.     if (s->sono_h)

  1022.         s->sono_idx = (s->sono_idx + s->sono_h - 1) % s->sono_h;

  1023.     return ret;

  1024. }

  1025. 

  1026. /* main filter control */

  1027. static av_cold int init(AVFilterContext *ctx)

  1028. {

  1029.     ShowCQTContext *s = ctx->priv;

  1030.     s->ctx = ctx;

  1031. 

  1032.     if (!s->fullhd) {

  1033.         av_log(ctx, AV_LOG_WARNING, "fullhd option is deprecated, use size/s option instead.\n");

  1034.         if (s->width != 1920 || s->height != 1080) {

  1035.             av_log(ctx, AV_LOG_ERROR, "fullhd set to 0 but with custom dimension.\n");

  1036.             return AVERROR(EINVAL);

  1037.         }

  1038.         s->width /= 2;

  1039.         s->height /= 2;

  1040.         s->fullhd = 1;

  1041.     }

  1042. 

  1043.     if (s->axis_h < 0) {

  1044.         s->axis_h = s->width / 60;

  1045.         if (s->axis_h & 1)

  1046.             s->axis_h++;

  1047.         if (s->bar_h >= 0 && s->sono_h >= 0)

  1048.             s->axis_h = s->height - s->bar_h - s->sono_h;

  1049.         if (s->bar_h >= 0 && s->sono_h < 0)

  1050.             s->axis_h = FFMIN(s->axis_h, s->height - s->bar_h);

  1051.         if (s->bar_h < 0 && s->sono_h >= 0)

  1052.             s->axis_h = FFMIN(s->axis_h, s->height - s->sono_h);

  1053.     }

  1054. 

  1055.     if (s->bar_h < 0) {

  1056.         s->bar_h = (s->height - s->axis_h) / 2;

  1057.         if (s->bar_h & 1)

  1058.             s->bar_h--;

  1059.         if (s->sono_h >= 0)

  1060.             s->bar_h = s->height - s->sono_h - s->axis_h;

  1061.     }

  1062. 

  1063.     if (s->sono_h < 0)

  1064.         s->sono_h = s->height - s->axis_h - s->bar_h;

  1065. 

  1066.     if ((s->width & 1) || (s->height & 1) || (s->bar_h & 1) || (s->axis_h & 1) || (s->sono_h & 1) ||

  1067.         (s->bar_h < 0) || (s->axis_h < 0) || (s->sono_h < 0) || (s->bar_h > s->height) ||

  1068.         (s->axis_h > s->height) || (s->sono_h > s->height) || (s->bar_h + s->axis_h + s->sono_h != s->height)) {

  1069.         av_log(ctx, AV_LOG_ERROR, "invalid dimension.\n");

  1070.         return AVERROR(EINVAL);

  1071.     }

  1072. 

  1073.     if (!s->fcount) {

  1074.         do {

  1075.             s->fcount++;

  1076.         } while(s->fcount * s->width < 1920 && s->fcount < 10);

  1077.     }

  1078. 

  1079.     return 0;

  1080. }

  1081. 

  1082. static av_cold void uninit(AVFilterContext *ctx)

  1083. {

  1084.     common_uninit(ctx->priv);

  1085. }

  1086. 

  1087. static int query_formats(AVFilterContext *ctx)

  1088. {

  1089.     AVFilterFormats *formats = NULL;

  1090.     AVFilterChannelLayouts *layouts = NULL;

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

  1092.     AVFilterLink *outlink = ctx->outputs[0];

  1093.     enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };

  1094.     enum AVPixelFormat pix_fmts[] = {

  1095.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,

  1096.         AV_PIX_FMT_YUV444P, AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE

  1097.     };

  1098.     int64_t channel_layouts[] = { AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_STEREO_DOWNMIX, -1 };

  1099.     int ret;

  1100. 

  1101.     /* set input audio formats */

  1102.     formats = ff_make_format_list(sample_fmts);

  1103.     if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)

  1104.         return ret;

  1105. 

  1106.     layouts = avfilter_make_format64_list(channel_layouts);

  1107.     if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)

  1108.         return ret;

  1109. 

  1110.     formats = ff_all_samplerates();

  1111.     if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)

  1112.         return ret;

  1113. 

  1114.     /* set output video format */

  1115.     formats = ff_make_format_list(pix_fmts);

  1116.     if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)

  1117.         return ret;

  1118. 

  1119.     return 0;

  1120. }

  1121. 

  1122. static int config_output(AVFilterLink *outlink)

  1123. {

  1124.     AVFilterContext *ctx = outlink->src;

  1125.     AVFilterLink *inlink = ctx->inputs[0];

  1126.     ShowCQTContext *s = ctx->priv;

  1127.     int ret;

  1128. 

  1129.     common_uninit(s);

  1130. 

  1131.     outlink->w = s->width;

  1132.     outlink->h = s->height;

  1133.     s->format = outlink->format;

  1134.     outlink->sample_aspect_ratio = av_make_q(1, 1);

  1135.     outlink->frame_rate = s->rate;

  1136.     outlink->time_base = av_inv_q(s->rate);

  1137.     av_log(ctx, AV_LOG_INFO, "video: %dx%d %s %d/%d fps, bar_h = %d, axis_h = %d, sono_h = %d.\n",

  1138.            s->width, s->height, av_get_pix_fmt_name(s->format), s->rate.num, s->rate.den,

  1139.            s->bar_h, s->axis_h, s->sono_h);

  1140. 

  1141.     s->cqt_len = s->width * s->fcount;

  1142.     if (!(s->freq = create_freq_table(s->basefreq, s->endfreq, s->cqt_len)))

  1143.         return AVERROR(ENOMEM);

  1144. 

  1145.     if ((ret = init_volume(s)) < 0)

  1146.         return ret;

  1147. 

  1148.     s->fft_bits = ceil(log2(inlink->sample_rate * s->timeclamp));

  1149.     s->fft_len = 1 << s->fft_bits;

  1150.     av_log(ctx, AV_LOG_INFO, "fft_len = %d, cqt_len = %d.\n", s->fft_len, s->cqt_len);

  1151. 

  1152.     s->fft_ctx = av_fft_init(s->fft_bits, 0);

  1153.     s->fft_data = av_calloc(s->fft_len, sizeof(*s->fft_data));

  1154.     s->fft_result = av_calloc(s->fft_len + 64, sizeof(*s->fft_result));

  1155.     s->cqt_result = av_malloc_array(s->cqt_len, sizeof(*s->cqt_result));

  1156.     if (!s->fft_ctx || !s->fft_data || !s->fft_result || !s->cqt_result)

  1157.         return AVERROR(ENOMEM);

  1158. 

  1159.     s->cqt_align = 1;

  1160.     s->cqt_coeffs_type = COEFFS_TYPE_DEFAULT;

  1161.     s->cqt_calc = cqt_calc;

  1162.     s->draw_sono = draw_sono;

  1163.     if (s->format == AV_PIX_FMT_RGB24) {

  1164.         s->draw_bar = draw_bar_rgb;

  1165.         s->draw_axis = draw_axis_rgb;

  1166.         s->update_sono = update_sono_rgb;

  1167.     } else {

  1168.         s->draw_bar = draw_bar_yuv;

  1169.         s->draw_axis = draw_axis_yuv;

  1170.         s->update_sono = update_sono_yuv;

  1171.     }

  1172. 

  1173.     if ((ret = init_cqt(s)) < 0)

  1174.         return ret;

  1175. 

  1176.     if (s->axis_h) {

  1177.         if (!s->axis) {

  1178.             if ((ret = init_axis_empty(s)) < 0)

  1179.                 return ret;

  1180.         } else if (s->axisfile) {

  1181.             if (init_axis_from_file(s) < 0) {

  1182.                 av_log(ctx, AV_LOG_WARNING, "loading axis image failed, fallback to font rendering.\n");

  1183.                 if (init_axis_from_font(s) < 0) {

  1184.                     av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");

  1185.                     if ((ret = init_axis_empty(s)) < 0)

  1186.                         return ret;

  1187.                 }

  1188.             }

  1189.         } else {

  1190.             if (init_axis_from_font(s) < 0) {

  1191.                 av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");

  1192.                 if ((ret = init_axis_empty(s)) < 0)

  1193.                     return ret;

  1194.             }

  1195.         }

  1196.     }

  1197. 

  1198.     if (s->sono_h) {

  1199.         s->sono_frame = alloc_frame_empty((outlink->format == AV_PIX_FMT_YUV420P) ?

  1200.                         AV_PIX_FMT_YUV422P : outlink->format, s->width, s->sono_h);

  1201.         if (!s->sono_frame)

  1202.             return AVERROR(ENOMEM);

  1203.     }

  1204. 

  1205.     s->h_buf = av_malloc_array(s->cqt_len, sizeof (*s->h_buf));

  1206.     s->rcp_h_buf = av_malloc_array(s->width, sizeof(*s->rcp_h_buf));

  1207.     s->c_buf = av_malloc_array(s->width, sizeof(*s->c_buf));

  1208.     if (!s->h_buf || !s->rcp_h_buf || !s->c_buf)

  1209.         return AVERROR(ENOMEM);

  1210. 

  1211.     s->sono_count = 0;

  1212.     s->frame_count = 0;

  1213.     s->sono_idx = 0;

  1214.     s->remaining_fill = s->fft_len / 2;

  1215.     s->remaining_frac = 0;

  1216.     s->step_frac = av_div_q(av_make_q(inlink->sample_rate, s->count) , s->rate);

  1217.     s->step = (int)(s->step_frac.num / s->step_frac.den);

  1218.     s->step_frac.num %= s->step_frac.den;

  1219.     if (s->step_frac.num) {

  1220.         av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d + %d/%d.\n",

  1221.                inlink->sample_rate, s->step, s->step_frac.num, s->step_frac.den);

  1222.         av_log(ctx, AV_LOG_WARNING, "fractional step.\n");

  1223.     } else {

  1224.         av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d.\n",

  1225.                inlink->sample_rate, s->step);

  1226.     }

  1227. 

  1228.     return 0;

  1229. }

  1230. 

  1231. 

  1232. static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)

  1233. {

  1234.     AVFilterContext *ctx = inlink->dst;

  1235.     ShowCQTContext *s = ctx->priv;

  1236.     int remaining, step, ret, x, i, j, m;

  1237.     float *audio_data;

  1238. 

  1239.     if (!insamples) {

  1240.         while (s->remaining_fill < s->fft_len / 2) {

  1241.             memset(&s->fft_data[s->fft_len - s->remaining_fill], 0, sizeof(*s->fft_data) * s->remaining_fill);

  1242.             ret = plot_cqt(ctx);

  1243.             if (ret < 0)

  1244.                 return ret;

  1245. 

  1246.             step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;

  1247.             s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;

  1248.             for (x = 0; x < (s->fft_len-step); x++)

  1249.                 s->fft_data[x] = s->fft_data[x+step];

  1250.             s->remaining_fill += step;

  1251.         }

  1252.         return AVERROR_EOF;

  1253.     }

  1254. 

  1255.     remaining = insamples->nb_samples;

  1256.     audio_data = (float*) insamples->data[0];

  1257. 

  1258.     while (remaining) {

  1259.         i = insamples->nb_samples - remaining;

  1260.         j = s->fft_len - s->remaining_fill;

  1261.         if (remaining >= s->remaining_fill) {

  1262.             for (m = 0; m < s->remaining_fill; m++) {

  1263.                 s->fft_data[j+m].re = audio_data[2*(i+m)];

  1264.                 s->fft_data[j+m].im = audio_data[2*(i+m)+1];

  1265.             }

  1266.             ret = plot_cqt(ctx);

  1267.             if (ret < 0) {

  1268.                 av_frame_free(&insamples);

  1269.                 return ret;

  1270.             }

  1271.             remaining -= s->remaining_fill;

  1272.             step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;

  1273.             s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;

  1274.             for (m = 0; m < s->fft_len-step; m++)

  1275.                 s->fft_data[m] = s->fft_data[m+step];

  1276.             s->remaining_fill = step;

  1277.         } else {

  1278.             for (m = 0; m < remaining; m++) {

  1279.                 s->fft_data[j+m].re = audio_data[2*(i+m)];

  1280.                 s->fft_data[j+m].im = audio_data[2*(i+m)+1];

  1281.             }

  1282.             s->remaining_fill -= remaining;

  1283.             remaining = 0;

  1284.         }

  1285.     }

  1286.     av_frame_free(&insamples);

  1287.     return 0;

  1288. }

  1289. 

  1290. static int request_frame(AVFilterLink *outlink)

  1291. {

  1292.     AVFilterLink *inlink = outlink->src->inputs[0];

  1293.     int ret;

  1294. 

  1295.     ret = ff_request_frame(inlink);

  1296.     if (ret == AVERROR_EOF)

  1297.         filter_frame(inlink, NULL);

  1298.     return ret;

  1299. }

  1300. 

  1301. static const AVFilterPad showcqt_inputs[] = {

  1302.     {

  1303.         .name         = "default",

  1304.         .type         = AVMEDIA_TYPE_AUDIO,

  1305.         .filter_frame = filter_frame,

  1306.     },

  1307.     { NULL }

  1308. };

  1309. 

  1310. static const AVFilterPad showcqt_outputs[] = {

  1311.     {

  1312.         .name          = "default",

  1313.         .type          = AVMEDIA_TYPE_VIDEO,

  1314.         .config_props  = config_output,

  1315.         .request_frame = request_frame,

  1316.     },

  1317.     { NULL }

  1318. };

  1319. 

  1320. AVFilter ff_avf_showcqt = {

  1321.     .name          = "showcqt",

  1322.     .description   = NULL_IF_CONFIG_SMALL("Convert input audio to a CQT (Constant/Clamped Q Transform) spectrum video output."),

  1323.     .init          = init,

  1324.     .uninit        = uninit,

  1325.     .query_formats = query_formats,

  1326.     .priv_size     = sizeof(ShowCQTContext),

  1327.     .inputs        = showcqt_inputs,

  1328.     .outputs       = showcqt_outputs,

  1329.     .priv_class    = &showcqt_class,

  1330. };