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FFmpeg/libavfilter/avf_showcqt.c

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  1. /*

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

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

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

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

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

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

  10.  *

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

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

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

  14.  * Lesser General Public License for more details.

  15.  *

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

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

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

  19.  */

  20. 

  21. #include "config.h"

  22. #include "libavcodec/avfft.h"

  23. #include "libavutil/avassert.h"

  24. #include "libavutil/opt.h"

  25. #include "libavutil/xga_font_data.h"

  26. #include "libavutil/eval.h"

  27. #include "libavutil/pixdesc.h"

  28. #include "libavutil/time.h"

  29. #include "avfilter.h"

  30. #include "internal.h"

  31. #include "lavfutils.h"

  32. #include "lswsutils.h"

  33. 

  34. #if CONFIG_LIBFREETYPE

  35. #include <ft2build.h>

  36. #include FT_FREETYPE_H

  37. #endif

  38. 

  39. #include "avf_showcqt.h"

  40. 

  41. #define BASEFREQ        20.01523126408007475

  42. #define ENDFREQ         20495.59681441799654

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

  44. #define TLENGTH_MIN     0.001

  45. #define VOLUME_MAX      100.0

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

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

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

  49. #define PTS_STEP 10

  50. #define PTS_TOLERANCE 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.     int level = AV_LOG_DEBUG;

  95.     int64_t plot_time;

  96. 

  97.     if (s->fft_time)

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

  99.     if (s->cqt_time)

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

  101.     if (s->process_cqt_time)

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

  103.     if (s->update_sono_time)

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

  105.     if (s->alloc_time)

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

  107.     if (s->bar_time)

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

  109.     if (s->axis_time)

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

  111.     if (s->sono_time)

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

  113. 

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

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

  116.     if (plot_time)

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

  118. 

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

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

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

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

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

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

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

  126.     }

  127. 

  128.     av_frame_free(&s->axis_frame);

  129.     av_frame_free(&s->sono_frame);

  130.     av_fft_end(s->fft_ctx);

  131.     s->fft_ctx = NULL;

  132.     if (s->coeffs)

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

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

  135.     av_freep(&s->coeffs);

  136.     av_freep(&s->fft_data);

  137.     av_freep(&s->fft_result);

  138.     av_freep(&s->cqt_result);

  139.     av_freep(&s->c_buf);

  140.     av_freep(&s->h_buf);

  141.     av_freep(&s->rcp_h_buf);

  142.     av_freep(&s->freq);

  143.     av_freep(&s->sono_v_buf);

  144.     av_freep(&s->bar_v_buf);

  145. }

  146. 

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

  148. {

  149.     double log_base, log_end;

  150.     double rcp_n = 1.0 / n;

  151.     double *freq;

  152.     int x;

  153. 

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

  155.     if (!freq)

  156.         return NULL;

  157. 

  158.     log_base = log(base);

  159.     log_end  = log(end);

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

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

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

  163.     }

  164.     return freq;

  165. }

  166. 

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

  168.                             double val, double min, double max,

  169.                             double nan_replace, int idx)

  170. {

  171.     int level = AV_LOG_WARNING;

  172.     if (isnan(val)) {

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

  174.                idx, name, nan_replace);

  175.         val = nan_replace;

  176.     } else if (val < min) {

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

  178.                idx, name, val, min);

  179.         val = min;

  180.     } else if (val > max) {

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

  182.                idx, name, val, max);

  183.         val = max;

  184.     }

  185.     return val;

  186. }

  187. 

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

  189. {

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

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

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

  193.     return ret;

  194. }

  195. 

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

  197. {

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

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

  200.     return ret;

  201. }

  202. 

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

  204. {

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

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

  207.     return ret;

  208. }

  209. 

  210. static int init_volume(ShowCQTContext *s)

  211. {

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

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

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

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

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

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

  218. 

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

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

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

  222.         goto error;

  223. 

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

  225.         goto error;

  226. 

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

  228.         goto error;

  229. 

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

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

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

  233.         vars[5] = vol;

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

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

  236.         vars[5] = vol;

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

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

  239.     }

  240.     av_expr_free(sono);

  241.     av_expr_free(bar);

  242.     return 0;

  243. 

  244. error:

  245.     av_freep(&s->sono_v_buf);

  246.     av_freep(&s->bar_v_buf);

  247.     av_expr_free(sono);

  248.     av_expr_free(bar);

  249.     return ret;

  250. }

  251. 

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

  253.                      int len, int fft_len)

  254. {

  255.     int k, x, i, j;

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

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

  258. 

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

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

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

  262.             j = fft_len - i;

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

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

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

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

  267.         }

  268. 

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

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

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

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

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

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

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

  276.     }

  277. }

  278. 

  279. static int init_cqt(ShowCQTContext *s)

  280. {

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

  282.     AVExpr *expr = NULL;

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

  284.     int nb_cqt_coeffs = 0;

  285.     int k, x, ret;

  286. 

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

  288.         goto error;

  289. 

  290.     ret = AVERROR(ENOMEM);

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

  292.         goto error;

  293. 

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

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

  296.         double flen, center, tlength;

  297.         int start, end, m = k;

  298. 

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

  300.             continue;

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

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

  303. 

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

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

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

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

  308. 

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

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

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

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

  313.             goto error;

  314. 

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

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

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

  318.             /* nuttall window */

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

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

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

  322.         }

  323.     }

  324. 

  325.     av_expr_free(expr);

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

  327.     return 0;

  328. 

  329. error:

  330.     av_expr_free(expr);

  331.     if (s->coeffs)

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

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

  334.     av_freep(&s->coeffs);

  335.     return ret;

  336. }

  337. 

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

  339. {

  340.     AVFrame *out;

  341.     out = av_frame_alloc();

  342.     if (!out)

  343.         return NULL;

  344.     out->format = format;

  345.     out->width = w;

  346.     out->height = h;

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

  348.         av_frame_free(&out);

  349.         return NULL;

  350.     }

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

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

  353.     } else {

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

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

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

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

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

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

  360.     }

  361.     return out;

  362. }

  363. 

  364. static enum AVPixelFormat convert_axis_pixel_format(enum AVPixelFormat format)

  365. {

  366.     switch (format) {

  367.         case AV_PIX_FMT_RGB24:   format = AV_PIX_FMT_RGBA; break;

  368.         case AV_PIX_FMT_YUV444P: format = AV_PIX_FMT_YUVA444P; break;

  369.         case AV_PIX_FMT_YUV422P: format = AV_PIX_FMT_YUVA422P; break;

  370.         case AV_PIX_FMT_YUV420P: format = AV_PIX_FMT_YUVA420P; break;

  371.     }

  372.     return format;

  373. }

  374. 

  375. static int init_axis_empty(ShowCQTContext *s)

  376. {

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

  378.         return AVERROR(ENOMEM);

  379.     return 0;

  380. }

  381. 

  382. static int init_axis_from_file(ShowCQTContext *s)

  383. {

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

  385.     int tmp_linesize[4];

  386.     enum AVPixelFormat tmp_format;

  387.     int tmp_w, tmp_h, ret;

  388. 

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

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

  391.         goto error;

  392. 

  393.     ret = AVERROR(ENOMEM);

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

  395.         goto error;

  396. 

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

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

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

  400.         goto error;

  401. 

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

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

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

  405.     av_freep(tmp_data);

  406.     return 0;

  407. 

  408. error:

  409.     av_frame_free(&s->axis_frame);

  410.     av_freep(tmp_data);

  411.     return ret;

  412. }

  413. 

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

  415. {

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

  417. }

  418. 

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

  420. {

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

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

  423. }

  424. 

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

  426. {

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

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

  429. }

  430. 

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

  432. {

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

  434.     return lrint(x*255.0);

  435. }

  436. 

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

  438. {

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

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

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

  442.     AVExpr *expr = NULL;

  443.     double *freq = NULL;

  444.     int x, y, ret;

  445. 

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

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

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

  449.         return AVERROR(EINVAL);

  450.     }

  451. 

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

  453.         freq = s->freq;

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

  455.         return AVERROR(ENOMEM);

  456. 

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

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

  459.             av_freep(&freq);

  460.         return ret;

  461.     }

  462. 

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

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

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

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

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

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

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

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

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

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

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

  474.         }

  475.     }

  476. 

  477.     av_expr_free(expr);

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

  479.         av_freep(&freq);

  480.     return 0;

  481. }

  482. 

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

  484. {

  485. #if CONFIG_LIBFREETYPE

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

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

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

  489.     FT_Library lib = NULL;

  490.     FT_Face face = NULL;

  491.     int font_width = 16, font_height = 32;

  492.     int font_repeat = font_width * 12;

  493.     int linear_hori_advance = font_width * 65536;

  494.     int non_monospace_warning = 0;

  495.     int x;

  496. 

  497.     if (!s->fontfile)

  498.         return AVERROR(EINVAL);

  499. 

  500.     if (FT_Init_FreeType(&lib))

  501.         goto fail;

  502. 

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

  504.         goto fail;

  505. 

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

  507.         goto fail;

  508. 

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

  510.         goto fail;

  511. 

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

  513.         goto fail;

  514. 

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

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

  517. 

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

  519.             continue;

  520. 

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

  522.             goto fail;

  523. 

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

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

  526.             non_monospace_warning = 1;

  527.         }

  528. 

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

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

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

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

  533.                 dy = by + sy;

  534.                 if (dy < 0)

  535.                     continue;

  536.                 if (dy >= font_height)

  537.                     break;

  538. 

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

  540.                     dx = bx + sx;

  541.                     if (dx < 0)

  542.                         continue;

  543.                     if (dx >= 1920)

  544.                         break;

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

  546.                 }

  547.             }

  548.         }

  549.     }

  550. 

  551.     FT_Done_Face(face);

  552.     FT_Done_FreeType(lib);

  553.     return 0;

  554. 

  555. fail:

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

  557.     FT_Done_Face(face);

  558.     FT_Done_FreeType(lib);

  559.     return AVERROR(EINVAL);

  560. #else

  561.     if (s->fontfile)

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

  563.     return AVERROR(EINVAL);

  564. #endif

  565. }

  566. 

  567. static int render_default_font(AVFrame *tmp)

  568. {

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

  570.     int x, u, v, mask;

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

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

  573. 

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

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

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

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

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

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

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

  581.                         p[3] = 255;

  582.                         p[7] = 255;

  583.                         p[linesize+3] = 255;

  584.                         p[linesize+7] = 255;

  585.                     }

  586.                 }

  587.             }

  588.         }

  589.     }

  590. 

  591.     return 0;

  592. }

  593. 

  594. static int init_axis_from_font(ShowCQTContext *s)

  595. {

  596.     AVFrame *tmp = NULL;

  597.     int ret = AVERROR(ENOMEM);

  598. 

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

  600.         goto fail;

  601. 

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

  603.         goto fail;

  604. 

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

  606.         goto fail;

  607. 

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

  609.         goto fail;

  610. 

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

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

  613.                               1920, 32, AV_PIX_FMT_RGBA, s->ctx)) < 0)

  614.         goto fail;

  615. 

  616.     av_frame_free(&tmp);

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

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

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

  620.     return 0;

  621. 

  622. fail:

  623.     av_frame_free(&tmp);

  624.     av_frame_free(&s->axis_frame);

  625.     return ret;

  626. }

  627. 

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

  629. {

  630.     if (g == 1.0f)

  631.         return v;

  632.     if (g == 2.0f)

  633.         return sqrtf(v);

  634.     if (g == 3.0f)

  635.         return cbrtf(v);

  636.     if (g == 4.0f)

  637.         return sqrtf(sqrtf(v));

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

  639. }

  640. 

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

  642. {

  643.     int x;

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

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

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

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

  648.     }

  649. }

  650. 

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

  652. {

  653.     int x;

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

  655.         float r, g, b;

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

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

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

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

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

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

  662.     }

  663. }

  664. 

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

  666.                          const ColorFloat *c, int bar_h)

  667. {

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

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

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

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

  672. 

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

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

  675.         lp = v + y * ls;

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

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

  678.                 *lp++ = 0;

  679.                 *lp++ = 0;

  680.                 *lp++ = 0;

  681.             } else {

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

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

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

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

  686.             }

  687.         }

  688.     }

  689. }

  690. 

  691. #define DRAW_BAR_WITH_CHROMA(x) \

  692. do { \

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

  694.         *lpy++ = 16; \

  695.         *lpu++ = 128; \

  696.         *lpv++ = 128; \

  697.     } else { \

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

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

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

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

  702.     } \

  703. } while (0)

  704. 

  705. #define DRAW_BAR_WITHOUT_CHROMA(x) \

  706. do { \

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

  708.         *lpy++ = 16; \

  709.     } else { \

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

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

  712.     } \

  713. } while (0)

  714. 

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

  716.                          const ColorFloat *c, int bar_h)

  717. {

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

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

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

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

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

  723.     int fmt = out->format;

  724. 

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

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

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

  728.         lpy = vy + y * lsy;

  729.         lpu = vu + yh * lsu;

  730.         lpv = vv + yh * lsv;

  731.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  733.                 DRAW_BAR_WITH_CHROMA(x);

  734.                 DRAW_BAR_WITH_CHROMA(x+1);

  735.             }

  736.         } else {

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

  738.                 DRAW_BAR_WITH_CHROMA(x);

  739.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  740.             }

  741.         }

  742. 

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

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

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

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

  747.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  749.                 DRAW_BAR_WITH_CHROMA(x);

  750.                 DRAW_BAR_WITH_CHROMA(x+1);

  751.             }

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

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

  754.                 DRAW_BAR_WITH_CHROMA(x);

  755.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  756.             }

  757.         } else {

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

  759.                 DRAW_BAR_WITHOUT_CHROMA(x);

  760.                 DRAW_BAR_WITHOUT_CHROMA(x+1);

  761.             }

  762.         }

  763.     }

  764. }

  765. 

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

  767. {

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

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

  770.     uint8_t *lp, *lpa;

  771. 

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

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

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

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

  776.             if (!lpa[3]) {

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

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

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

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

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

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

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

  784.             } else {

  785.                 a = rcp_255 * lpa[3];

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

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

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

  789.             }

  790.             lpa += 4;

  791.         }

  792.     }

  793. }

  794. 

  795. #define BLEND_WITH_CHROMA(c) \

  796. do { \

  797.     if (!*lpaa) { \

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

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

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

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

  802.         *lpy = *lpay; \

  803.         *lpu = *lpau; \

  804.         *lpv = *lpav; \

  805.     } else { \

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

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

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

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

  810.     } \

  811.     lpy++; lpu++; lpv++; \

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

  813. } while (0)

  814. 

  815. #define BLEND_WITHOUT_CHROMA(c) \

  816. do { \

  817.     if (!*lpaa) { \

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

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

  820.         *lpy = *lpay; \

  821.     } else { \

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

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

  824.     } \

  825.     lpy++; \

  826.     lpay++; lpaa++; \

  827. } while (0)

  828. 

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

  830. {

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

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

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

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

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

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

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

  838. 

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

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

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

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

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

  844.         lpay = vay + y * lsay;

  845.         lpau = vau + yh * lsau;

  846.         lpav = vav + yh * lsav;

  847.         lpaa = vaa + y * lsaa;

  848.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  850.                 BLEND_WITH_CHROMA(c[x]);

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

  852.             }

  853.         } else {

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

  855.                 BLEND_WITH_CHROMA(c[x]);

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

  857.             }

  858.         }

  859. 

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

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

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

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

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

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

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

  867.         if (fmt == AV_PIX_FMT_YUV444P) {

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

  869.                 BLEND_WITH_CHROMA(c[x]);

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

  871.             }

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

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

  874.                 BLEND_WITH_CHROMA(c[x]);

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

  876.             }

  877.         } else {

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

  879.                 BLEND_WITHOUT_CHROMA(c[x]);

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

  881.             }

  882.         }

  883.     }

  884. }

  885. 

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

  887. {

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

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

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

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

  892.     int ls, i, y, yh;

  893. 

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

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

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

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

  898.     }

  899. 

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

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

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

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

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

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

  906.         }

  907.     }

  908. }

  909. 

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

  911. {

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

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

  914. 

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

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

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

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

  919.     }

  920. }

  921. 

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

  923. {

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

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

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

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

  928. 

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

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

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

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

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

  934.         if (fmt == AV_PIX_FMT_YUV444P) {

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

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

  937.         }

  938.     }

  939. }

  940. 

  941. static void process_cqt(ShowCQTContext *s)

  942. {

  943.     int x, i;

  944.     if (!s->sono_count) {

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

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

  947.         }

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

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

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

  951.                 float h = 0.0f;

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

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

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

  955.             }

  956.         }

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

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

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

  960.         }

  961.     }

  962. 

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

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

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

  966.     }

  967. 

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

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

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

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

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

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

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

  975.             }

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

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

  978.         }

  979.     }

  980. 

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

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

  983.     else

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

  985. }

  986. 

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

  988. {

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

  990.     ShowCQTContext *s = ctx->priv;

  991.     int64_t last_time, cur_time;

  992. 

  993. #define UPDATE_TIME(t) \

  994.     cur_time = av_gettime(); \

  995.     t += cur_time - last_time; \

  996.     last_time = cur_time

  997. 

  998.     last_time = av_gettime();

  999. 

  1000.     memcpy(s->fft_result, s->fft_data, s->fft_len * sizeof(*s->fft_data));

  1001.     av_fft_permute(s->fft_ctx, s->fft_result);

  1002.     av_fft_calc(s->fft_ctx, s->fft_result);

  1003.     s->fft_result[s->fft_len] = s->fft_result[0];

  1004.     UPDATE_TIME(s->fft_time);

  1005. 

  1006.     s->cqt_calc(s->cqt_result, s->fft_result, s->coeffs, s->cqt_len, s->fft_len);

  1007.     UPDATE_TIME(s->cqt_time);

  1008. 

  1009.     process_cqt(s);

  1010.     UPDATE_TIME(s->process_cqt_time);

  1011. 

  1012.     if (s->sono_h) {

  1013.         s->update_sono(s->sono_frame, s->c_buf, s->sono_idx);

  1014.         UPDATE_TIME(s->update_sono_time);

  1015.     }

  1016. 

  1017.     if (!s->sono_count) {

  1018.         AVFrame *out = *frameout = ff_get_video_buffer(outlink, outlink->w, outlink->h);

  1019.         if (!out)

  1020.             return AVERROR(ENOMEM);

  1021.         UPDATE_TIME(s->alloc_time);

  1022. 

  1023.         if (s->bar_h) {

  1024.             s->draw_bar(out, s->h_buf, s->rcp_h_buf, s->c_buf, s->bar_h);

  1025.             UPDATE_TIME(s->bar_time);

  1026.         }

  1027. 

  1028.         if (s->axis_h) {

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

  1030.             UPDATE_TIME(s->axis_time);

  1031.         }

  1032. 

  1033.         if (s->sono_h) {

  1034.             s->draw_sono(out, s->sono_frame, s->bar_h + s->axis_h, s->sono_idx);

  1035.             UPDATE_TIME(s->sono_time);

  1036.         }

  1037.         out->pts = s->next_pts;

  1038.         s->next_pts += PTS_STEP;

  1039.     }

  1040.     s->sono_count = (s->sono_count + 1) % s->count;

  1041.     if (s->sono_h)

  1042.         s->sono_idx = (s->sono_idx + s->sono_h - 1) % s->sono_h;

  1043.     return 0;

  1044. }

  1045. 

  1046. /* main filter control */

  1047. static av_cold int init(AVFilterContext *ctx)

  1048. {

  1049.     ShowCQTContext *s = ctx->priv;

  1050.     s->ctx = ctx;

  1051. 

  1052.     if (!s->fullhd) {

  1053.         av_log(ctx, AV_LOG_WARNING, "fullhd option is deprecated, use size/s option instead.\n");

  1054.         if (s->width != 1920 || s->height != 1080) {

  1055.             av_log(ctx, AV_LOG_ERROR, "fullhd set to 0 but with custom dimension.\n");

  1056.             return AVERROR(EINVAL);

  1057.         }

  1058.         s->width /= 2;

  1059.         s->height /= 2;

  1060.         s->fullhd = 1;

  1061.     }

  1062. 

  1063.     if (s->axis_h < 0) {

  1064.         s->axis_h = s->width / 60;

  1065.         if (s->axis_h & 1)

  1066.             s->axis_h++;

  1067.         if (s->bar_h >= 0 && s->sono_h >= 0)

  1068.             s->axis_h = s->height - s->bar_h - s->sono_h;

  1069.         if (s->bar_h >= 0 && s->sono_h < 0)

  1070.             s->axis_h = FFMIN(s->axis_h, s->height - s->bar_h);

  1071.         if (s->bar_h < 0 && s->sono_h >= 0)

  1072.             s->axis_h = FFMIN(s->axis_h, s->height - s->sono_h);

  1073.     }

  1074. 

  1075.     if (s->bar_h < 0) {

  1076.         s->bar_h = (s->height - s->axis_h) / 2;

  1077.         if (s->bar_h & 1)

  1078.             s->bar_h--;

  1079.         if (s->sono_h >= 0)

  1080.             s->bar_h = s->height - s->sono_h - s->axis_h;

  1081.     }

  1082. 

  1083.     if (s->sono_h < 0)

  1084.         s->sono_h = s->height - s->axis_h - s->bar_h;

  1085. 

  1086.     if ((s->width & 1) || (s->height & 1) || (s->bar_h & 1) || (s->axis_h & 1) || (s->sono_h & 1) ||

  1087.         (s->bar_h < 0) || (s->axis_h < 0) || (s->sono_h < 0) || (s->bar_h > s->height) ||

  1088.         (s->axis_h > s->height) || (s->sono_h > s->height) || (s->bar_h + s->axis_h + s->sono_h != s->height)) {

  1089.         av_log(ctx, AV_LOG_ERROR, "invalid dimension.\n");

  1090.         return AVERROR(EINVAL);

  1091.     }

  1092. 

  1093.     if (!s->fcount) {

  1094.         do {

  1095.             s->fcount++;

  1096.         } while(s->fcount * s->width < 1920 && s->fcount < 10);

  1097.     }

  1098. 

  1099.     return 0;

  1100. }

  1101. 

  1102. static av_cold void uninit(AVFilterContext *ctx)

  1103. {

  1104.     common_uninit(ctx->priv);

  1105. }

  1106. 

  1107. static int query_formats(AVFilterContext *ctx)

  1108. {

  1109.     AVFilterFormats *formats = NULL;

  1110.     AVFilterChannelLayouts *layouts = NULL;

  1111.     AVFilterLink *inlink = ctx->inputs[0];

  1112.     AVFilterLink *outlink = ctx->outputs[0];

  1113.     enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };

  1114.     enum AVPixelFormat pix_fmts[] = {

  1115.         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,

  1116.         AV_PIX_FMT_YUV444P, AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE

  1117.     };

  1118.     int64_t channel_layouts[] = { AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_STEREO_DOWNMIX, -1 };

  1119.     int ret;

  1120. 

  1121.     /* set input audio formats */

  1122.     formats = ff_make_format_list(sample_fmts);

  1123.     if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)

  1124.         return ret;

  1125. 

  1126.     layouts = avfilter_make_format64_list(channel_layouts);

  1127.     if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)

  1128.         return ret;

  1129. 

  1130.     formats = ff_all_samplerates();

  1131.     if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)

  1132.         return ret;

  1133. 

  1134.     /* set output video format */

  1135.     formats = ff_make_format_list(pix_fmts);

  1136.     if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)

  1137.         return ret;

  1138. 

  1139.     return 0;

  1140. }

  1141. 

  1142. static int config_output(AVFilterLink *outlink)

  1143. {

  1144.     AVFilterContext *ctx = outlink->src;

  1145.     AVFilterLink *inlink = ctx->inputs[0];

  1146.     ShowCQTContext *s = ctx->priv;

  1147.     int ret;

  1148. 

  1149.     common_uninit(s);

  1150. 

  1151.     outlink->w = s->width;

  1152.     outlink->h = s->height;

  1153.     s->format = outlink->format;

  1154.     outlink->sample_aspect_ratio = av_make_q(1, 1);

  1155.     outlink->frame_rate = s->rate;

  1156.     outlink->time_base = av_mul_q(av_inv_q(s->rate), av_make_q(1, PTS_STEP));

  1157.     av_log(ctx, AV_LOG_INFO, "video: %dx%d %s %d/%d fps, bar_h = %d, axis_h = %d, sono_h = %d.\n",

  1158.            s->width, s->height, av_get_pix_fmt_name(s->format), s->rate.num, s->rate.den,

  1159.            s->bar_h, s->axis_h, s->sono_h);

  1160. 

  1161.     s->cqt_len = s->width * s->fcount;

  1162.     if (!(s->freq = create_freq_table(s->basefreq, s->endfreq, s->cqt_len)))

  1163.         return AVERROR(ENOMEM);

  1164. 

  1165.     if ((ret = init_volume(s)) < 0)

  1166.         return ret;

  1167. 

  1168.     s->fft_bits = ceil(log2(inlink->sample_rate * s->timeclamp));

  1169.     s->fft_len = 1 << s->fft_bits;

  1170.     av_log(ctx, AV_LOG_INFO, "fft_len = %d, cqt_len = %d.\n", s->fft_len, s->cqt_len);

  1171. 

  1172.     s->fft_ctx = av_fft_init(s->fft_bits, 0);

  1173.     s->fft_data = av_calloc(s->fft_len, sizeof(*s->fft_data));

  1174.     s->fft_result = av_calloc(s->fft_len + 64, sizeof(*s->fft_result));

  1175.     s->cqt_result = av_malloc_array(s->cqt_len, sizeof(*s->cqt_result));

  1176.     if (!s->fft_ctx || !s->fft_data || !s->fft_result || !s->cqt_result)

  1177.         return AVERROR(ENOMEM);

  1178. 

  1179.     s->cqt_align = 1;

  1180.     s->cqt_calc = cqt_calc;

  1181.     s->draw_sono = draw_sono;

  1182.     if (s->format == AV_PIX_FMT_RGB24) {

  1183.         s->draw_bar = draw_bar_rgb;

  1184.         s->draw_axis = draw_axis_rgb;

  1185.         s->update_sono = update_sono_rgb;

  1186.     } else {

  1187.         s->draw_bar = draw_bar_yuv;

  1188.         s->draw_axis = draw_axis_yuv;

  1189.         s->update_sono = update_sono_yuv;

  1190.     }

  1191. 

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

  1193.         return ret;

  1194. 

  1195.     if (s->axis_h) {

  1196.         if (!s->axis) {

  1197.             if ((ret = init_axis_empty(s)) < 0)

  1198.                 return ret;

  1199.         } else if (s->axisfile) {

  1200.             if (init_axis_from_file(s) < 0) {

  1201.                 av_log(ctx, AV_LOG_WARNING, "loading axis image failed, fallback to font rendering.\n");

  1202.                 if (init_axis_from_font(s) < 0) {

  1203.                     av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");

  1204.                     if ((ret = init_axis_empty(s)) < 0)

  1205.                         return ret;

  1206.                 }

  1207.             }

  1208.         } else {

  1209.             if (init_axis_from_font(s) < 0) {

  1210.                 av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");

  1211.                 if ((ret = init_axis_empty(s)) < 0)

  1212.                     return ret;

  1213.             }

  1214.         }

  1215.     }

  1216. 

  1217.     if (s->sono_h) {

  1218.         s->sono_frame = alloc_frame_empty((outlink->format == AV_PIX_FMT_YUV420P) ?

  1219.                         AV_PIX_FMT_YUV422P : outlink->format, s->width, s->sono_h);

  1220.         if (!s->sono_frame)

  1221.             return AVERROR(ENOMEM);

  1222.     }

  1223. 

  1224.     s->h_buf = av_malloc_array(s->cqt_len, sizeof (*s->h_buf));

  1225.     s->rcp_h_buf = av_malloc_array(s->width, sizeof(*s->rcp_h_buf));

  1226.     s->c_buf = av_malloc_array(s->width, sizeof(*s->c_buf));

  1227.     if (!s->h_buf || !s->rcp_h_buf || !s->c_buf)

  1228.         return AVERROR(ENOMEM);

  1229. 

  1230.     s->sono_count = 0;

  1231.     s->next_pts = 0;

  1232.     s->sono_idx = 0;

  1233.     s->remaining_fill = s->fft_len / 2;

  1234.     s->remaining_frac = 0;

  1235.     s->step_frac = av_div_q(av_make_q(inlink->sample_rate, s->count) , s->rate);

  1236.     s->step = (int)(s->step_frac.num / s->step_frac.den);

  1237.     s->step_frac.num %= s->step_frac.den;

  1238.     if (s->step_frac.num) {

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

  1240.                inlink->sample_rate, s->step, s->step_frac.num, s->step_frac.den);

  1241.         av_log(ctx, AV_LOG_WARNING, "fractional step.\n");

  1242.     } else {

  1243.         av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d.\n",

  1244.                inlink->sample_rate, s->step);

  1245.     }

  1246. 

  1247.     return 0;

  1248. }

  1249. 

  1250. 

  1251. static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)

  1252. {

  1253.     AVFilterContext *ctx = inlink->dst;

  1254.     AVFilterLink *outlink = ctx->outputs[0];

  1255.     ShowCQTContext *s = ctx->priv;

  1256.     int remaining, step, ret, x, i, j, m;

  1257.     float *audio_data;

  1258.     AVFrame *out = NULL;

  1259. 

  1260.     if (!insamples) {

  1261.         while (s->remaining_fill < s->fft_len / 2) {

  1262.             memset(&s->fft_data[s->fft_len - s->remaining_fill], 0, sizeof(*s->fft_data) * s->remaining_fill);

  1263.             ret = plot_cqt(ctx, &out);

  1264.             if (ret < 0)

  1265.                 return ret;

  1266. 

  1267.             step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;

  1268.             s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;

  1269.             for (x = 0; x < (s->fft_len-step); x++)

  1270.                 s->fft_data[x] = s->fft_data[x+step];

  1271.             s->remaining_fill += step;

  1272. 

  1273.             if (out)

  1274.                 return ff_filter_frame(outlink, out);

  1275.         }

  1276.         return AVERROR_EOF;

  1277.     }

  1278. 

  1279.     remaining = insamples->nb_samples;

  1280.     audio_data = (float*) insamples->data[0];

  1281. 

  1282.     while (remaining) {

  1283.         i = insamples->nb_samples - remaining;

  1284.         j = s->fft_len - s->remaining_fill;

  1285.         if (remaining >= s->remaining_fill) {

  1286.             for (m = 0; m < s->remaining_fill; m++) {

  1287.                 s->fft_data[j+m].re = audio_data[2*(i+m)];

  1288.                 s->fft_data[j+m].im = audio_data[2*(i+m)+1];

  1289.             }

  1290.             ret = plot_cqt(ctx, &out);

  1291.             if (ret < 0) {

  1292.                 av_frame_free(&insamples);

  1293.                 return ret;

  1294.             }

  1295.             remaining -= s->remaining_fill;

  1296.             if (out) {

  1297.                 int64_t pts = av_rescale_q(insamples->pts, inlink->time_base, av_make_q(1, inlink->sample_rate));

  1298.                 pts += insamples->nb_samples - remaining - s->fft_len/2;

  1299.                 pts = av_rescale_q(pts, av_make_q(1, inlink->sample_rate), outlink->time_base);

  1300.                 if (FFABS(pts - out->pts) > PTS_TOLERANCE) {

  1301.                     av_log(ctx, AV_LOG_DEBUG, "changing pts from %"PRId64" (%.3f) to %"PRId64" (%.3f).\n",

  1302.                            out->pts, out->pts * av_q2d(outlink->time_base),

  1303.                            pts, pts * av_q2d(outlink->time_base));

  1304.                     out->pts = pts;

  1305.                     s->next_pts = pts + PTS_STEP;

  1306.                 }

  1307.                 ret = ff_filter_frame(outlink, out);

  1308.                 if (ret < 0) {

  1309.                     av_frame_free(&insamples);

  1310.                     return ret;

  1311.                 }

  1312.                 out = NULL;

  1313.             }

  1314.             step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;

  1315.             s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;

  1316.             for (m = 0; m < s->fft_len-step; m++)

  1317.                 s->fft_data[m] = s->fft_data[m+step];

  1318.             s->remaining_fill = step;

  1319.         } else {

  1320.             for (m = 0; m < remaining; m++) {

  1321.                 s->fft_data[j+m].re = audio_data[2*(i+m)];

  1322.                 s->fft_data[j+m].im = audio_data[2*(i+m)+1];

  1323.             }

  1324.             s->remaining_fill -= remaining;

  1325.             remaining = 0;

  1326.         }

  1327.     }

  1328.     av_frame_free(&insamples);

  1329.     return 0;

  1330. }

  1331. 

  1332. static int request_frame(AVFilterLink *outlink)

  1333. {

  1334.     AVFilterLink *inlink = outlink->src->inputs[0];

  1335.     int ret;

  1336. 

  1337.     ret = ff_request_frame(inlink);

  1338.     if (ret == AVERROR_EOF)

  1339.         ret = filter_frame(inlink, NULL);

  1340.     return ret;

  1341. }

  1342. 

  1343. static const AVFilterPad showcqt_inputs[] = {

  1344.     {

  1345.         .name         = "default",

  1346.         .type         = AVMEDIA_TYPE_AUDIO,

  1347.         .filter_frame = filter_frame,

  1348.     },

  1349.     { NULL }

  1350. };

  1351. 

  1352. static const AVFilterPad showcqt_outputs[] = {

  1353.     {

  1354.         .name          = "default",

  1355.         .type          = AVMEDIA_TYPE_VIDEO,

  1356.         .config_props  = config_output,

  1357.         .request_frame = request_frame,

  1358.     },

  1359.     { NULL }

  1360. };

  1361. 

  1362. AVFilter ff_avf_showcqt = {

  1363.     .name          = "showcqt",

  1364.     .description   = NULL_IF_CONFIG_SMALL("Convert input audio to a CQT (Constant/Clamped Q Transform) spectrum video output."),

  1365.     .init          = init,

  1366.     .uninit        = uninit,

  1367.     .query_formats = query_formats,

  1368.     .priv_size     = sizeof(ShowCQTContext),

  1369.     .inputs        = showcqt_inputs,

  1370.     .outputs       = showcqt_outputs,

  1371.     .priv_class    = &showcqt_class,

  1372. };