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FFmpeg/libavfilter/avf_showcqt.c

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  1. /*

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

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

  6.  * FFmpeg is free software; you can redistribute it and/or

  7.  * modify it under the terms of the GNU Lesser General Public

  8.  * License as published by the Free Software Foundation; either

  9.  * version 2.1 of the License, or (at your option) any later version.

  10.  *

  11.  * FFmpeg is distributed in the hope that it will be useful,

  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  14.  * Lesser General Public License for more details.

  15.  *

  16.  * You should have received a copy of the GNU Lesser General Public

  17.  * License along with FFmpeg; if not, write to the Free Software

  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  19.  */

  20. 

  21. #include "config.h"

  22. #include "libavcodec/avfft.h"

  23. #include "libavutil/avassert.h"

  24. #include "libavutil/opt.h"

  25. #include "libavutil/xga_font_data.h"

  26. #include "libavutil/eval.h"

  27. #include "libavutil/pixdesc.h"

  28. #include "avfilter.h"

  29. #include "internal.h"

  30. #include "lavfutils.h"

  31. #include "lswsutils.h"

  32. 

  33. #if CONFIG_LIBFREETYPE

  34. #include <ft2build.h>

  35. #include FT_FREETYPE_H

  36. #endif

  37. 

  38. #include "avf_showcqt.h"

  39. 

  40. #define BASEFREQ        20.01523126408007475

  41. #define ENDFREQ         20495.59681441799654

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

  43. #define TLENGTH_MIN     0.001

  44. #define VOLUME_MAX      100.0

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

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

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

  48. #define PTS_STEP 10

  49. #define PTS_TOLERANCE 1

  50. 

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

  52. #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM)

  53. 

  54. static const AVOption showcqt_options[] = {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  85.     { NULL }

  86. };

  87. 

  88. AVFILTER_DEFINE_CLASS(showcqt);

  89. 

  90. static void common_uninit(ShowCQTContext *s)

  91. {

  92.     int k;

  93. 

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

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

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

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

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

  99.     }

  100. 

  101.     av_frame_free(&s->axis_frame);

  102.     av_frame_free(&s->sono_frame);

  103.     av_fft_end(s->fft_ctx);

  104.     s->fft_ctx = NULL;

  105.     if (s->coeffs)

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

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

  108.     av_freep(&s->coeffs);

  109.     av_freep(&s->fft_data);

  110.     av_freep(&s->fft_result);

  111.     av_freep(&s->cqt_result);

  112.     av_freep(&s->c_buf);

  113.     av_freep(&s->h_buf);

  114.     av_freep(&s->rcp_h_buf);

  115.     av_freep(&s->freq);

  116.     av_freep(&s->sono_v_buf);

  117.     av_freep(&s->bar_v_buf);

  118. }

  119. 

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

  121. {

  122.     double log_base, log_end;

  123.     double rcp_n = 1.0 / n;

  124.     double *freq;

  125.     int x;

  126. 

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

  128.     if (!freq)

  129.         return NULL;

  130. 

  131.     log_base = log(base);

  132.     log_end  = log(end);

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

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

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

  136.     }

  137.     return freq;

  138. }

  139. 

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

  141.                             double val, double min, double max,

  142.                             double nan_replace, int idx)

  143. {

  144.     int level = AV_LOG_WARNING;

  145.     if (isnan(val)) {

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

  147.                idx, name, nan_replace);

  148.         val = nan_replace;

  149.     } else if (val < min) {

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

  151.                idx, name, val, min);

  152.         val = min;

  153.     } else if (val > max) {

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

  155.                idx, name, val, max);

  156.         val = max;

  157.     }

  158.     return val;

  159. }

  160. 

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

  162. {

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

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

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

  166.     return ret;

  167. }

  168. 

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

  170. {

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

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

  173.     return ret;

  174. }

  175. 

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

  177. {

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

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

  180.     return ret;

  181. }

  182. 

  183. static int init_volume(ShowCQTContext *s)

  184. {

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

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

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

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

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

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

  191. 

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

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

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

  195.         goto error;

  196. 

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

  198.         goto error;

  199. 

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

  201.         goto error;

  202. 

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

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

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

  206.         vars[5] = vol;

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

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

  209.         vars[5] = vol;

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

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

  212.     }

  213.     av_expr_free(sono);

  214.     av_expr_free(bar);

  215.     return 0;

  216. 

  217. error:

  218.     av_freep(&s->sono_v_buf);

  219.     av_freep(&s->bar_v_buf);

  220.     av_expr_free(sono);

  221.     av_expr_free(bar);

  222.     return ret;

  223. }

  224. 

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

  226.                      int len, int fft_len)

  227. {

  228.     int k, x, i, j;

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

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

  231. 

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

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

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

  235.             j = fft_len - i;

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

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

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

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

  240.         }

  241. 

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

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

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

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

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

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

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

  249.     }

  250. }

  251. 

  252. #if 0

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

  254.                                 int len, int fft_len)

  255. {

  256.     int k, x, i, m;

  257. 

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

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

  260. 

  261.         m = 2 * k;

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

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

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

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

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

  267.         }

  268. 

  269.         m++;

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

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

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

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

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

  275.         }

  276. 

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

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

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

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

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

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

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

  284.     }

  285. }

  286. #endif

  287. 

  288. static int init_cqt(ShowCQTContext *s)

  289. {

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

  291.     AVExpr *expr = NULL;

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

  293.     int nb_cqt_coeffs = 0, nb_cqt_coeffs_r = 0;

  294.     int k, x, ret;

  295. 

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

  297.         goto error;

  298. 

  299.     ret = AVERROR(ENOMEM);

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

  301.         goto error;

  302. 

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

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

  305.         double flen, center, tlength;

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

  307. 

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

  309.             continue;

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

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

  312. 

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

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

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

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

  317. 

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

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

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

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

  322.             goto error;

  323. 

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

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

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

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

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

  329.                 goto error;

  330.         }

  331. 

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

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

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

  335.             /* nuttall window */

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

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

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

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

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

  341.         }

  342.     }

  343. 

  344.     av_expr_free(expr);

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

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

  347.     else

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

  349.     return 0;

  350. 

  351. error:

  352.     av_expr_free(expr);

  353.     if (s->coeffs)

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

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

  356.     av_freep(&s->coeffs);

  357.     return ret;

  358. }

  359. 

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

  361. {

  362.     AVFrame *out;

  363.     out = av_frame_alloc();

  364.     if (!out)

  365.         return NULL;

  366.     out->format = format;

  367.     out->width = w;

  368.     out->height = h;

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

  370.         av_frame_free(&out);

  371.         return NULL;

  372.     }

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

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

  375.     } else {

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

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

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

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

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

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

  382.     }

  383.     return out;

  384. }

  385. 

  386. static enum AVPixelFormat convert_axis_pixel_format(enum AVPixelFormat format)

  387. {

  388.     switch (format) {

  389.         case AV_PIX_FMT_RGB24:   format = AV_PIX_FMT_RGBA; break;

  390.         case AV_PIX_FMT_YUV444P: format = AV_PIX_FMT_YUVA444P; break;

  391.         case AV_PIX_FMT_YUV422P: format = AV_PIX_FMT_YUVA422P; break;

  392.         case AV_PIX_FMT_YUV420P: format = AV_PIX_FMT_YUVA420P; break;

  393.     }

  394.     return format;

  395. }

  396. 

  397. static int init_axis_empty(ShowCQTContext *s)

  398. {

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

  400.         return AVERROR(ENOMEM);

  401.     return 0;

  402. }

  403. 

  404. static int init_axis_from_file(ShowCQTContext *s)

  405. {

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

  407.     int tmp_linesize[4];

  408.     enum AVPixelFormat tmp_format;

  409.     int tmp_w, tmp_h, ret;

  410. 

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

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

  413.         goto error;

  414. 

  415.     ret = AVERROR(ENOMEM);

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

  417.         goto error;

  418. 

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

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

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

  422.         goto error;

  423. 

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

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

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

  427.     av_freep(tmp_data);

  428.     return 0;

  429. 

  430. error:

  431.     av_frame_free(&s->axis_frame);

  432.     av_freep(tmp_data);

  433.     return ret;

  434. }

  435. 

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

  437. {

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

  439. }

  440. 

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

  442. {

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

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

  445. }

  446. 

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

  448. {

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

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

  451. }

  452. 

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

  454. {

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

  456.     return lrint(x*255.0);

  457. }

  458. 

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

  460. {

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

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

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

  464.     AVExpr *expr = NULL;

  465.     double *freq = NULL;

  466.     int x, y, ret;

  467. 

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

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

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

  471.         return AVERROR(EINVAL);

  472.     }

  473. 

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

  475.         freq = s->freq;

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

  477.         return AVERROR(ENOMEM);

  478. 

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

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

  481.             av_freep(&freq);

  482.         return ret;

  483.     }

  484. 

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

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

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

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

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

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

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

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

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

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

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

  496.         }

  497.     }

  498. 

  499.     av_expr_free(expr);

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

  501.         av_freep(&freq);

  502.     return 0;

  503. }

  504. 

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

  506. {

  507. #if CONFIG_LIBFREETYPE

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

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

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

  511.     FT_Library lib = NULL;

  512.     FT_Face face = NULL;

  513.     int font_width = 16, font_height = 32;

  514.     int font_repeat = font_width * 12;

  515.     int linear_hori_advance = font_width * 65536;

  516.     int non_monospace_warning = 0;

  517.     int x;

  518. 

  519.     if (!s->fontfile)

  520.         return AVERROR(EINVAL);

  521. 

  522.     if (FT_Init_FreeType(&lib))

  523.         goto fail;

  524. 

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

  526.         goto fail;

  527. 

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

  529.         goto fail;

  530. 

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

  532.         goto fail;

  533. 

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

  535.         goto fail;

  536. 

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

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

  539. 

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

  541.             continue;

  542. 

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

  544.             goto fail;

  545. 

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

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

  548.             non_monospace_warning = 1;

  549.         }

  550. 

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

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

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

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

  555.                 dy = by + sy;

  556.                 if (dy < 0)

  557.                     continue;

  558.                 if (dy >= font_height)

  559.                     break;

  560. 

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

  562.                     dx = bx + sx;

  563.                     if (dx < 0)

  564.                         continue;

  565.                     if (dx >= 1920)

  566.                         break;

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

  568.                 }

  569.             }

  570.         }

  571.     }

  572. 

  573.     FT_Done_Face(face);

  574.     FT_Done_FreeType(lib);

  575.     return 0;

  576. 

  577. fail:

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

  579.     FT_Done_Face(face);

  580.     FT_Done_FreeType(lib);

  581.     return AVERROR(EINVAL);

  582. #else

  583.     if (s->fontfile)

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

  585.     return AVERROR(EINVAL);

  586. #endif

  587. }

  588. 

  589. static int render_default_font(AVFrame *tmp)

  590. {

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

  592.     int x, u, v, mask;

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

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

  595. 

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

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

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

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

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

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

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

  603.                         p[3] = 255;

  604.                         p[7] = 255;

  605.                         p[linesize+3] = 255;

  606.                         p[linesize+7] = 255;

  607.                     }

  608.                 }

  609.             }

  610.         }

  611.     }

  612. 

  613.     return 0;

  614. }

  615. 

  616. static int init_axis_from_font(ShowCQTContext *s)

  617. {

  618.     AVFrame *tmp = NULL;

  619.     int ret = AVERROR(ENOMEM);

  620. 

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

  622.         goto fail;

  623. 

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

  625.         goto fail;

  626. 

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

  628.         goto fail;

  629. 

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

  631.         goto fail;

  632. 

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

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

  635.                               1920, 32, AV_PIX_FMT_RGBA, s->ctx)) < 0)

  636.         goto fail;

  637. 

  638.     av_frame_free(&tmp);

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

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

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

  642.     return 0;

  643. 

  644. fail:

  645.     av_frame_free(&tmp);

  646.     av_frame_free(&s->axis_frame);

  647.     return ret;

  648. }

  649. 

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

  651. {

  652.     if (g == 1.0f)

  653.         return v;

  654.     if (g == 2.0f)

  655.         return sqrtf(v);

  656.     if (g == 3.0f)

  657.         return cbrtf(v);

  658.     if (g == 4.0f)

  659.         return sqrtf(sqrtf(v));

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

  661. }

  662. 

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

  664. {

  665.     int x;

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

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

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

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

  670.     }

  671. }

  672. 

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

  674. {

  675.     int x;

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

  677.         float r, g, b;

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

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

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

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

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

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

  684.     }

  685. }

  686. 

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

  688.                          const ColorFloat *c, int bar_h)

  689. {

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

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

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

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

  694. 

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

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

  697.         lp = v + y * ls;

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

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

  700.                 *lp++ = 0;

  701.                 *lp++ = 0;

  702.                 *lp++ = 0;

  703.             } else {

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

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

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

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

  708.             }

  709.         }

  710.     }

  711. }

  712. 

  713. #define DRAW_BAR_WITH_CHROMA(x) \

  714. do { \

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

  716.         *lpy++ = 16; \

  717.         *lpu++ = 128; \

  718.         *lpv++ = 128; \

  719.     } else { \

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

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

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

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

  724.     } \

  725. } while (0)

  726. 

  727. #define DRAW_BAR_WITHOUT_CHROMA(x) \

  728. do { \

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

  730.         *lpy++ = 16; \

  731.     } else { \

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

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

  734.     } \

  735. } while (0)

  736. 

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

  738.                          const ColorFloat *c, int bar_h)

  739. {

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

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

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

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

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

  745.     int fmt = out->format;

  746. 

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

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

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

  750.         lpy = vy + y * lsy;

  751.         lpu = vu + yh * lsu;

  752.         lpv = vv + yh * lsv;

  753.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  755.                 DRAW_BAR_WITH_CHROMA(x);

  756.                 DRAW_BAR_WITH_CHROMA(x+1);

  757.             }

  758.         } else {

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

  760.                 DRAW_BAR_WITH_CHROMA(x);

  761.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  762.             }

  763.         }

  764. 

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

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

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

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

  769.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  771.                 DRAW_BAR_WITH_CHROMA(x);

  772.                 DRAW_BAR_WITH_CHROMA(x+1);

  773.             }

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

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

  776.                 DRAW_BAR_WITH_CHROMA(x);

  777.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  778.             }

  779.         } else {

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

  781.                 DRAW_BAR_WITHOUT_CHROMA(x);

  782.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  783.             }

  784.         }

  785.     }

  786. }

  787. 

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

  789. {

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

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

  792.     uint8_t *lp, *lpa;

  793. 

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

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

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

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

  798.             if (!lpa[3]) {

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

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

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

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

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

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

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

  806.             } else {

  807.                 a = rcp_255 * lpa[3];

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

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

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

  811.             }

  812.             lpa += 4;

  813.         }

  814.     }

  815. }

  816. 

  817. #define BLEND_WITH_CHROMA(c) \

  818. do { \

  819.     if (!*lpaa) { \

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

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

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

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

  824.         *lpy = *lpay; \

  825.         *lpu = *lpau; \

  826.         *lpv = *lpav; \

  827.     } else { \

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

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

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

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

  832.     } \

  833.     lpy++; lpu++; lpv++; \

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

  835. } while (0)

  836. 

  837. #define BLEND_WITHOUT_CHROMA(c) \

  838. do { \

  839.     if (!*lpaa) { \

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

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

  842.         *lpy = *lpay; \

  843.     } else { \

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

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

  846.     } \

  847.     lpy++; \

  848.     lpay++; lpaa++; \

  849. } while (0)

  850. 

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

  852. {

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

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

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

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

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

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

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

  860. 

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

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

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

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

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

  866.         lpay = vay + y * lsay;

  867.         lpau = vau + yh * lsau;

  868.         lpav = vav + yh * lsav;

  869.         lpaa = vaa + y * lsaa;

  870.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  872.                 BLEND_WITH_CHROMA(c[x]);

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

  874.             }

  875.         } else {

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

  877.                 BLEND_WITH_CHROMA(c[x]);

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

  879.             }

  880.         }

  881. 

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

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

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

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

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

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

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

  889.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  891.                 BLEND_WITH_CHROMA(c[x]);

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

  893.             }

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

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

  896.                 BLEND_WITH_CHROMA(c[x]);

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

  898.             }

  899.         } else {

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

  901.                 BLEND_WITHOUT_CHROMA(c[x]);

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

  903.             }

  904.         }

  905.     }

  906. }

  907. 

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

  909. {

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

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

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

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

  914.     int ls, i, y, yh;

  915. 

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

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

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

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

  920.     }

  921. 

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

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

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

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

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

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

  928.         }

  929.     }

  930. }

  931. 

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

  933. {

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

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

  936. 

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

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

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

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

  941.     }

  942. }

  943. 

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

  945. {

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

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

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

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

  950. 

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

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

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

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

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

  956.         if (fmt == AV_PIX_FMT_YUV444P) {

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

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

  959.         }

  960.     }

  961. }

  962. 

  963. static void process_cqt(ShowCQTContext *s)

  964. {

  965.     int x, i;

  966.     if (!s->sono_count) {

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

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

  969.         }

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

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

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

  973.                 float h = 0.0f;

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

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

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

  977.             }

  978.         }

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

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

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

  982.         }

  983.     }

  984. 

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

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

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

  988.     }

  989. 

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

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

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

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

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

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

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

  997.             }

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

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

  1000.         }

  1001.     }

  1002. 

  1003.     if (s->format == AV_PIX_FMT_RGB24)

  1004.         rgb_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width);

  1005.     else

  1006.         yuv_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width);

  1007. }

  1008. 

  1009. static int plot_cqt(AVFilterContext *ctx, AVFrame **frameout)

  1010. {

  1011.     AVFilterLink *outlink = ctx->outputs[0];

  1012.     ShowCQTContext *s = ctx->priv;

  1013. 

  1014.     memcpy(s->fft_result, s->fft_data, s->fft_len * sizeof(*s->fft_data));

  1015.     av_fft_permute(s->fft_ctx, s->fft_result);

  1016.     av_fft_calc(s->fft_ctx, s->fft_result);

  1017.     s->fft_result[s->fft_len] = s->fft_result[0];

  1018.     s->cqt_calc(s->cqt_result, s->fft_result, s->coeffs, s->cqt_len, s->fft_len);

  1019.     process_cqt(s);

  1020.     if (s->sono_h)

  1021.         s->update_sono(s->sono_frame, s->c_buf, s->sono_idx);

  1022.     if (!s->sono_count) {

  1023.         AVFrame *out = *frameout = ff_get_video_buffer(outlink, outlink->w, outlink->h);

  1024.         if (!out)

  1025.             return AVERROR(ENOMEM);

  1026.         if (s->bar_h)

  1027.             s->draw_bar(out, s->h_buf, s->rcp_h_buf, s->c_buf, s->bar_h);

  1028.         if (s->axis_h)

  1029.             s->draw_axis(out, s->axis_frame, s->c_buf, s->bar_h);

  1030.         if (s->sono_h)

  1031.             s->draw_sono(out, s->sono_frame, s->bar_h + s->axis_h, s->sono_idx);

  1032.         out->pts = s->next_pts;

  1033.         s->next_pts += PTS_STEP;

  1034.     }

  1035.     s->sono_count = (s->sono_count + 1) % s->count;

  1036.     if (s->sono_h)

  1037.         s->sono_idx = (s->sono_idx + s->sono_h - 1) % s->sono_h;

  1038.     return 0;

  1039. }

  1040. 

  1041. /* main filter control */

  1042. static av_cold int init(AVFilterContext *ctx)

  1043. {

  1044.     ShowCQTContext *s = ctx->priv;

  1045.     s->ctx = ctx;

  1046. 

  1047.     if (!s->fullhd) {

  1048.         av_log(ctx, AV_LOG_WARNING, "fullhd option is deprecated, use size/s option instead.\n");

  1049.         if (s->width != 1920 || s->height != 1080) {

  1050.             av_log(ctx, AV_LOG_ERROR, "fullhd set to 0 but with custom dimension.\n");

  1051.             return AVERROR(EINVAL);

  1052.         }

  1053.         s->width /= 2;

  1054.         s->height /= 2;

  1055.         s->fullhd = 1;

  1056.     }

  1057. 

  1058.     if (s->axis_h < 0) {

  1059.         s->axis_h = s->width / 60;

  1060.         if (s->axis_h & 1)

  1061.             s->axis_h++;

  1062.         if (s->bar_h >= 0 && s->sono_h >= 0)

  1063.             s->axis_h = s->height - s->bar_h - s->sono_h;

  1064.         if (s->bar_h >= 0 && s->sono_h < 0)

  1065.             s->axis_h = FFMIN(s->axis_h, s->height - s->bar_h);

  1066.         if (s->bar_h < 0 && s->sono_h >= 0)

  1067.             s->axis_h = FFMIN(s->axis_h, s->height - s->sono_h);

  1068.     }

  1069. 

  1070.     if (s->bar_h < 0) {

  1071.         s->bar_h = (s->height - s->axis_h) / 2;

  1072.         if (s->bar_h & 1)

  1073.             s->bar_h--;

  1074.         if (s->sono_h >= 0)

  1075.             s->bar_h = s->height - s->sono_h - s->axis_h;

  1076.     }

  1077. 

  1078.     if (s->sono_h < 0)

  1079.         s->sono_h = s->height - s->axis_h - s->bar_h;

  1080. 

  1081.     if ((s->width & 1) || (s->height & 1) || (s->bar_h & 1) || (s->axis_h & 1) || (s->sono_h & 1) ||

  1082.         (s->bar_h < 0) || (s->axis_h < 0) || (s->sono_h < 0) || (s->bar_h > s->height) ||

  1083.         (s->axis_h > s->height) || (s->sono_h > s->height) || (s->bar_h + s->axis_h + s->sono_h != s->height)) {

  1084.         av_log(ctx, AV_LOG_ERROR, "invalid dimension.\n");

  1085.         return AVERROR(EINVAL);

  1086.     }

  1087. 

  1088.     if (!s->fcount) {

  1089.         do {

  1090.             s->fcount++;

  1091.         } while(s->fcount * s->width < 1920 && s->fcount < 10);

  1092.     }

  1093. 

  1094.     return 0;

  1095. }

  1096. 

  1097. static av_cold void uninit(AVFilterContext *ctx)

  1098. {

  1099.     common_uninit(ctx->priv);

  1100. }

  1101. 

  1102. static int query_formats(AVFilterContext *ctx)

  1103. {

  1104.     AVFilterFormats *formats = NULL;

  1105.     AVFilterChannelLayouts *layouts = NULL;

  1106.     AVFilterLink *inlink = ctx->inputs[0];

  1107.     AVFilterLink *outlink = ctx->outputs[0];

  1108.     enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };

  1109.     enum AVPixelFormat pix_fmts[] = {

  1110.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,

  1111.         AV_PIX_FMT_YUV444P, AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE

  1112.     };

  1113.     int64_t channel_layouts[] = { AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_STEREO_DOWNMIX, -1 };

  1114.     int ret;

  1115. 

  1116.     /* set input audio formats */

  1117.     formats = ff_make_format_list(sample_fmts);

  1118.     if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)

  1119.         return ret;

  1120. 

  1121.     layouts = avfilter_make_format64_list(channel_layouts);

  1122.     if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)

  1123.         return ret;

  1124. 

  1125.     formats = ff_all_samplerates();

  1126.     if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)

  1127.         return ret;

  1128. 

  1129.     /* set output video format */

  1130.     formats = ff_make_format_list(pix_fmts);

  1131.     if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)

  1132.         return ret;

  1133. 

  1134.     return 0;

  1135. }

  1136. 

  1137. static int config_output(AVFilterLink *outlink)

  1138. {

  1139.     AVFilterContext *ctx = outlink->src;

  1140.     AVFilterLink *inlink = ctx->inputs[0];

  1141.     ShowCQTContext *s = ctx->priv;

  1142.     int ret;

  1143. 

  1144.     common_uninit(s);

  1145. 

  1146.     outlink->w = s->width;

  1147.     outlink->h = s->height;

  1148.     s->format = outlink->format;

  1149.     outlink->sample_aspect_ratio = av_make_q(1, 1);

  1150.     outlink->frame_rate = s->rate;

  1151.     outlink->time_base = av_mul_q(av_inv_q(s->rate), av_make_q(1, PTS_STEP));

  1152.     av_log(ctx, AV_LOG_INFO, "video: %dx%d %s %d/%d fps, bar_h = %d, axis_h = %d, sono_h = %d.\n",

  1153.            s->width, s->height, av_get_pix_fmt_name(s->format), s->rate.num, s->rate.den,

  1154.            s->bar_h, s->axis_h, s->sono_h);

  1155. 

  1156.     s->cqt_len = s->width * s->fcount;

  1157.     if (!(s->freq = create_freq_table(s->basefreq, s->endfreq, s->cqt_len)))

  1158.         return AVERROR(ENOMEM);

  1159. 

  1160.     if ((ret = init_volume(s)) < 0)

  1161.         return ret;

  1162. 

  1163.     s->fft_bits = ceil(log2(inlink->sample_rate * s->timeclamp));

  1164.     s->fft_len = 1 << s->fft_bits;

  1165.     av_log(ctx, AV_LOG_INFO, "fft_len = %d, cqt_len = %d.\n", s->fft_len, s->cqt_len);

  1166. 

  1167.     s->fft_ctx = av_fft_init(s->fft_bits, 0);

  1168.     s->fft_data = av_calloc(s->fft_len, sizeof(*s->fft_data));

  1169.     s->fft_result = av_calloc(s->fft_len + 64, sizeof(*s->fft_result));

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

  1171.     if (!s->fft_ctx || !s->fft_data || !s->fft_result || !s->cqt_result)

  1172.         return AVERROR(ENOMEM);

  1173. 

  1174.     s->cqt_align = 1;

  1175.     s->cqt_coeffs_type = COEFFS_TYPE_DEFAULT;

  1176.     s->cqt_calc = cqt_calc;

  1177.     s->draw_sono = draw_sono;

  1178.     if (s->format == AV_PIX_FMT_RGB24) {

  1179.         s->draw_bar = draw_bar_rgb;

  1180.         s->draw_axis = draw_axis_rgb;

  1181.         s->update_sono = update_sono_rgb;

  1182.     } else {

  1183.         s->draw_bar = draw_bar_yuv;

  1184.         s->draw_axis = draw_axis_yuv;

  1185.         s->update_sono = update_sono_yuv;

  1186.     }

  1187. 

  1188.     if ((ret = init_cqt(s)) < 0)

  1189.         return ret;

  1190. 

  1191.     if (s->axis_h) {

  1192.         if (!s->axis) {

  1193.             if ((ret = init_axis_empty(s)) < 0)

  1194.                 return ret;

  1195.         } else if (s->axisfile) {

  1196.             if (init_axis_from_file(s) < 0) {

  1197.                 av_log(ctx, AV_LOG_WARNING, "loading axis image failed, fallback to font rendering.\n");

  1198.                 if (init_axis_from_font(s) < 0) {

  1199.                     av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");

  1200.                     if ((ret = init_axis_empty(s)) < 0)

  1201.                         return ret;

  1202.                 }

  1203.             }

  1204.         } else {

  1205.             if (init_axis_from_font(s) < 0) {

  1206.                 av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");

  1207.                 if ((ret = init_axis_empty(s)) < 0)

  1208.                     return ret;

  1209.             }

  1210.         }

  1211.     }

  1212. 

  1213.     if (s->sono_h) {

  1214.         s->sono_frame = alloc_frame_empty((outlink->format == AV_PIX_FMT_YUV420P) ?

  1215.                         AV_PIX_FMT_YUV422P : outlink->format, s->width, s->sono_h);

  1216.         if (!s->sono_frame)

  1217.             return AVERROR(ENOMEM);

  1218.     }

  1219. 

  1220.     s->h_buf = av_malloc_array(s->cqt_len, sizeof (*s->h_buf));

  1221.     s->rcp_h_buf = av_malloc_array(s->width, sizeof(*s->rcp_h_buf));

  1222.     s->c_buf = av_malloc_array(s->width, sizeof(*s->c_buf));

  1223.     if (!s->h_buf || !s->rcp_h_buf || !s->c_buf)

  1224.         return AVERROR(ENOMEM);

  1225. 

  1226.     s->sono_count = 0;

  1227.     s->next_pts = 0;

  1228.     s->sono_idx = 0;

  1229.     s->remaining_fill = s->fft_len / 2;

  1230.     s->remaining_frac = 0;

  1231.     s->step_frac = av_div_q(av_make_q(inlink->sample_rate, s->count) , s->rate);

  1232.     s->step = (int)(s->step_frac.num / s->step_frac.den);

  1233.     s->step_frac.num %= s->step_frac.den;

  1234.     if (s->step_frac.num) {

  1235.         av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d + %d/%d.\n",

  1236.                inlink->sample_rate, s->step, s->step_frac.num, s->step_frac.den);

  1237.         av_log(ctx, AV_LOG_WARNING, "fractional step.\n");

  1238.     } else {

  1239.         av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d.\n",

  1240.                inlink->sample_rate, s->step);

  1241.     }

  1242. 

  1243.     return 0;

  1244. }

  1245. 

  1246. 

  1247. static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)

  1248. {

  1249.     AVFilterContext *ctx = inlink->dst;

  1250.     AVFilterLink *outlink = ctx->outputs[0];

  1251.     ShowCQTContext *s = ctx->priv;

  1252.     int remaining, step, ret, x, i, j, m;

  1253.     float *audio_data;

  1254.     AVFrame *out = NULL;

  1255. 

  1256.     if (!insamples) {

  1257.         while (s->remaining_fill < s->fft_len / 2) {

  1258.             memset(&s->fft_data[s->fft_len - s->remaining_fill], 0, sizeof(*s->fft_data) * s->remaining_fill);

  1259.             ret = plot_cqt(ctx, &out);

  1260.             if (ret < 0)

  1261.                 return ret;

  1262. 

  1263.             step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;

  1264.             s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;

  1265.             for (x = 0; x < (s->fft_len-step); x++)

  1266.                 s->fft_data[x] = s->fft_data[x+step];

  1267.             s->remaining_fill += step;

  1268. 

  1269.             if (out)

  1270.                 return ff_filter_frame(outlink, out);

  1271.         }

  1272.         return AVERROR_EOF;

  1273.     }

  1274. 

  1275.     remaining = insamples->nb_samples;

  1276.     audio_data = (float*) insamples->data[0];

  1277. 

  1278.     while (remaining) {

  1279.         i = insamples->nb_samples - remaining;

  1280.         j = s->fft_len - s->remaining_fill;

  1281.         if (remaining >= s->remaining_fill) {

  1282.             for (m = 0; m < s->remaining_fill; m++) {

  1283.                 s->fft_data[j+m].re = audio_data[2*(i+m)];

  1284.                 s->fft_data[j+m].im = audio_data[2*(i+m)+1];

  1285.             }

  1286.             ret = plot_cqt(ctx, &out);

  1287.             if (ret < 0) {

  1288.                 av_frame_free(&insamples);

  1289.                 return ret;

  1290.             }

  1291.             remaining -= s->remaining_fill;

  1292.             if (out) {

  1293.                 int64_t pts = av_rescale_q(insamples->pts, inlink->time_base, av_make_q(1, inlink->sample_rate));

  1294.                 pts += insamples->nb_samples - remaining - s->fft_len/2;

  1295.                 pts = av_rescale_q(pts, av_make_q(1, inlink->sample_rate), outlink->time_base);

  1296.                 if (FFABS(pts - out->pts) > PTS_TOLERANCE) {

  1297.                     av_log(ctx, AV_LOG_DEBUG, "changing pts from %"PRId64" (%.3f) to %"PRId64" (%.3f).\n",

  1298.                            out->pts, out->pts * av_q2d(outlink->time_base),

  1299.                            pts, pts * av_q2d(outlink->time_base));

  1300.                     out->pts = pts;

  1301.                     s->next_pts = pts + PTS_STEP;

  1302.                 }

  1303.                 ret = ff_filter_frame(outlink, out);

  1304.                 if (ret < 0) {

  1305.                     av_frame_free(&insamples);

  1306.                     return ret;

  1307.                 }

  1308.                 out = NULL;

  1309.             }

  1310.             step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;

  1311.             s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;

  1312.             for (m = 0; m < s->fft_len-step; m++)

  1313.                 s->fft_data[m] = s->fft_data[m+step];

  1314.             s->remaining_fill = step;

  1315.         } else {

  1316.             for (m = 0; m < remaining; m++) {

  1317.                 s->fft_data[j+m].re = audio_data[2*(i+m)];

  1318.                 s->fft_data[j+m].im = audio_data[2*(i+m)+1];

  1319.             }

  1320.             s->remaining_fill -= remaining;

  1321.             remaining = 0;

  1322.         }

  1323.     }

  1324.     av_frame_free(&insamples);

  1325.     return 0;

  1326. }

  1327. 

  1328. static int request_frame(AVFilterLink *outlink)

  1329. {

  1330.     AVFilterLink *inlink = outlink->src->inputs[0];

  1331.     int ret;

  1332. 

  1333.     ret = ff_request_frame(inlink);

  1334.     if (ret == AVERROR_EOF)

  1335.         ret = filter_frame(inlink, NULL);

  1336.     return ret;

  1337. }

  1338. 

  1339. static const AVFilterPad showcqt_inputs[] = {

  1340.     {

  1341.         .name         = "default",

  1342.         .type         = AVMEDIA_TYPE_AUDIO,

  1343.         .filter_frame = filter_frame,

  1344.     },

  1345.     { NULL }

  1346. };

  1347. 

  1348. static const AVFilterPad showcqt_outputs[] = {

  1349.     {

  1350.         .name          = "default",

  1351.         .type          = AVMEDIA_TYPE_VIDEO,

  1352.         .config_props  = config_output,

  1353.         .request_frame = request_frame,

  1354.     },

  1355.     { NULL }

  1356. };

  1357. 

  1358. AVFilter ff_avf_showcqt = {

  1359.     .name          = "showcqt",

  1360.     .description   = NULL_IF_CONFIG_SMALL("Convert input audio to a CQT (Constant/Clamped Q Transform) spectrum video output."),

  1361.     .init          = init,

  1362.     .uninit        = uninit,

  1363.     .query_formats = query_formats,

  1364.     .priv_size     = sizeof(ShowCQTContext),

  1365.     .inputs        = showcqt_inputs,

  1366.     .outputs       = showcqt_outputs,

  1367.     .priv_class    = &showcqt_class,

  1368. };