/*
* Copyright (c) 2014-2015 Muhammad Faiz <mfcc64@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <math.h>
#include <stdlib.h>
#include "config.h"
#include "libavcodec/avfft.h"
#include "libavutil/avassert.h"
#include "libavutil/opt.h"
#include "libavutil/xga_font_data.h"
#include "libavutil/eval.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
#include "lavfutils.h"
#include "lswsutils.h"
#if CONFIG_LIBFREETYPE
#include <ft2build.h>
#include FT_FREETYPE_H
#endif
#include "avf_showcqt.h"
#define BASEFREQ 20.01523126408007475
#define ENDFREQ 20495.59681441799654
#define TLENGTH "384*tc/(384+tc*f)"
#define TLENGTH_MIN 0.001
#define VOLUME_MAX 100.0
#define FONTCOLOR "st(0, (midi(f)-59.5)/12);" \
"st(1, if(between(ld(0),0,1), 0.5-0.5*cos(2*PI*ld(0)), 0));" \
"r(1-ld(1)) + b(ld(1))"
#define OFFSET(x) offsetof(ShowCQTContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption showcqt_options[] = {
{ "size", "set video size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, { .str = "1920x1080" }, 0, 0, FLAGS },
{ "s", "set video size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, { .str = "1920x1080" }, 0, 0, FLAGS },
{ "fps", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, { .str = "25" }, 0, 0, FLAGS },
{ "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, { .str = "25" }, 0, 0, FLAGS },
{ "r", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, { .str = "25" }, 0, 0, FLAGS },
{ "bar_h", "set bargraph height", OFFSET(bar_h), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "axis_h", "set axis height", OFFSET(axis_h), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "sono_h", "set sonogram height", OFFSET(sono_h), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "fullhd", "set fullhd size", OFFSET(fullhd), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
{ "sono_v", "set sonogram volume", OFFSET(sono_v), AV_OPT_TYPE_STRING, { .str = "16" }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "volume", "set sonogram volume", OFFSET(sono_v), AV_OPT_TYPE_STRING, { .str = "16" }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "bar_v", "set bargraph volume", OFFSET(bar_v), AV_OPT_TYPE_STRING, { .str = "sono_v" }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "volume2", "set bargraph volume", OFFSET(bar_v), AV_OPT_TYPE_STRING, { .str = "sono_v" }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "sono_g", "set sonogram gamma", OFFSET(sono_g), AV_OPT_TYPE_FLOAT, { .dbl = 3.0 }, 1.0, 7.0, FLAGS },
{ "gamma", "set sonogram gamma", OFFSET(sono_g), AV_OPT_TYPE_FLOAT, { .dbl = 3.0 }, 1.0, 7.0, FLAGS },
{ "bar_g", "set bargraph gamma", OFFSET(bar_g), AV_OPT_TYPE_FLOAT, { .dbl = 1.0 }, 1.0, 7.0, FLAGS },
{ "gamma2", "set bargraph gamma", OFFSET(bar_g), AV_OPT_TYPE_FLOAT, { .dbl = 1.0 }, 1.0, 7.0, FLAGS },
{ "timeclamp", "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 }, 0.1, 1.0, FLAGS },
{ "tc", "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 }, 0.1, 1.0, FLAGS },
{ "basefreq", "set base frequency", OFFSET(basefreq), AV_OPT_TYPE_DOUBLE, { .dbl = BASEFREQ }, 10.0, 100000.0, FLAGS },
{ "endfreq", "set end frequency", OFFSET(endfreq), AV_OPT_TYPE_DOUBLE, { .dbl = ENDFREQ }, 10.0, 100000.0, FLAGS },
{ "coeffclamp", "set coeffclamp", OFFSET(coeffclamp), AV_OPT_TYPE_FLOAT, { .dbl = 1.0 }, 0.1, 10.0, FLAGS },
{ "tlength", "set tlength", OFFSET(tlength), AV_OPT_TYPE_STRING, { .str = TLENGTH }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "count", "set transform count", OFFSET(count), AV_OPT_TYPE_INT, { .i64 = 6 }, 1, 30, FLAGS },
{ "fcount", "set frequency count", OFFSET(fcount), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 10, FLAGS },
{ "fontfile", "set axis font", OFFSET(fontfile), AV_OPT_TYPE_STRING, { .str = NULL }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "fontcolor", "set font color", OFFSET(fontcolor), AV_OPT_TYPE_STRING, { .str = FONTCOLOR }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "axisfile", "set axis image", OFFSET(axisfile), AV_OPT_TYPE_STRING, { .str = NULL }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "axis", "draw axis", OFFSET(axis), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
{ "text", "draw axis", OFFSET(axis), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(showcqt);
static void common_uninit(ShowCQTContext *s)
{
int k;
/* axis_frame may be non reference counted frame */
if (s->axis_frame && !s->axis_frame->buf[0]) {
av_freep(s->axis_frame->data);
for (k = 0; k < 4; k++)
s->axis_frame->data[k] = NULL;
}
av_frame_free(&s->axis_frame);
av_frame_free(&s->sono_frame);
av_fft_end(s->fft_ctx);
s->fft_ctx = NULL;
if (s->coeffs)
for (k = 0; k < s->cqt_len * 2; k++)
av_freep(&s->coeffs[k].val);
av_freep(&s->coeffs);
av_freep(&s->fft_data);
av_freep(&s->fft_result);
av_freep(&s->cqt_result);
av_freep(&s->c_buf);
av_freep(&s->h_buf);
av_freep(&s->rcp_h_buf);
av_freep(&s->freq);
av_freep(&s->sono_v_buf);
av_freep(&s->bar_v_buf);
}
static double *create_freq_table(double base, double end, int n)
{
double log_base, log_end;
double rcp_n = 1.0 / n;
double *freq;
int x;
freq = av_malloc_array(n, sizeof(*freq));
if (!freq)
return NULL;
log_base = log(base);
log_end = log(end);
for (x = 0; x < n; x++) {
double log_freq = log_base + (x + 0.5) * (log_end - log_base) * rcp_n;
freq[x] = exp(log_freq);
}
return freq;
}
static double clip_with_log(void *log_ctx, const char *name,
double val, double min, double max,
double nan_replace, int idx)
{
int level = AV_LOG_WARNING;
if (isnan(val)) {
av_log(log_ctx, level, "[%d] %s is nan, setting it to %g.\n",
idx, name, nan_replace);
val = nan_replace;
} else if (val < min) {
av_log(log_ctx, level, "[%d] %s is too low (%g), setting it to %g.\n",
idx, name, val, min);
val = min;
} else if (val > max) {
av_log(log_ctx, level, "[%d] %s it too high (%g), setting it to %g.\n",
idx, name, val, max);
val = max;
}
return val;
}
static double a_weighting(void *p, double f)
{
double ret = 12200.0*12200.0 * (f*f*f*f);
ret /= (f*f + 20.6*20.6) * (f*f + 12200.0*12200.0) *
sqrt((f*f + 107.7*107.7) * (f*f + 737.9*737.9));
return ret;
}
static double b_weighting(void *p, double f)
{
double ret = 12200.0*12200.0 * (f*f*f);
ret /= (f*f + 20.6*20.6) * (f*f + 12200.0*12200.0) * sqrt(f*f + 158.5*158.5);
return ret;
}
static double c_weighting(void *p, double f)
{
double ret = 12200.0*12200.0 * (f*f);
ret /= (f*f + 20.6*20.6) * (f*f + 12200.0*12200.0);
return ret;
}
static int init_volume(ShowCQTContext *s)
{
const char *func_names[] = { "a_weighting", "b_weighting", "c_weighting", NULL };
const char *sono_names[] = { "timeclamp", "tc", "frequency", "freq", "f", "bar_v", NULL };
const char *bar_names[] = { "timeclamp", "tc", "frequency", "freq", "f", "sono_v", NULL };
double (*funcs[])(void *, double) = { a_weighting, b_weighting, c_weighting };
AVExpr *sono = NULL, *bar = NULL;
int x, ret = AVERROR(ENOMEM);
s->sono_v_buf = av_malloc_array(s->cqt_len, sizeof(*s->sono_v_buf));
s->bar_v_buf = av_malloc_array(s->cqt_len, sizeof(*s->bar_v_buf));
if (!s->sono_v_buf || !s->bar_v_buf)
goto error;
if ((ret = av_expr_parse(&sono, s->sono_v, sono_names, func_names, funcs, NULL, NULL, 0, s->ctx)) < 0)
goto error;
if ((ret = av_expr_parse(&bar, s->bar_v, bar_names, func_names, funcs, NULL, NULL, 0, s->ctx)) < 0)
goto error;
for (x = 0; x < s->cqt_len; x++) {
double vars[] = { s->timeclamp, s->timeclamp, s->freq[x], s->freq[x], s->freq[x], 0.0 };
double vol = clip_with_log(s->ctx, "sono_v", av_expr_eval(sono, vars, NULL), 0.0, VOLUME_MAX, 0.0, x);
vars[5] = vol;
vol = clip_with_log(s->ctx, "bar_v", av_expr_eval(bar, vars, NULL), 0.0, VOLUME_MAX, 0.0, x);
s->bar_v_buf[x] = vol * vol;
vars[5] = vol;
vol = clip_with_log(s->ctx, "sono_v", av_expr_eval(sono, vars, NULL), 0.0, VOLUME_MAX, 0.0, x);
s->sono_v_buf[x] = vol * vol;
}
av_expr_free(sono);
av_expr_free(bar);
return 0;
error:
av_freep(&s->sono_v_buf);
av_freep(&s->bar_v_buf);
av_expr_free(sono);
av_expr_free(bar);
return ret;
}
static void cqt_calc(FFTComplex *dst, const FFTComplex *src, const Coeffs *coeffs,
int len, int fft_len)
{
int k, x, i, j;
for (k = 0; k < len; k++) {
FFTComplex l, r, a = {0,0}, b = {0,0};
for (x = 0; x < coeffs[k].len; x++) {
FFTSample u = coeffs[k].val[x];
i = coeffs[k].start + x;
j = fft_len - i;
a.re += u * src[i].re;
a.im += u * src[i].im;
b.re += u * src[j].re;
b.im += u * src[j].im;
}
/* separate left and right, (and multiply by 2.0) */
l.re = a.re + b.re;
l.im = a.im - b.im;
r.re = b.im + a.im;
r.im = b.re - a.re;
dst[k].re = l.re * l.re + l.im * l.im;
dst[k].im = r.re * r.re + r.im * r.im;
}
}
#if 0
static void cqt_calc_interleave(FFTComplex *dst, const FFTComplex *src, const Coeffs *coeffs,
int len, int fft_len)
{
int k, x, i, m;
for (k = 0; k < len; k++) {
FFTComplex l, r, a = {0,0}, b = {0,0};
m = 2 * k;
for (x = 0; x < coeffs[m].len; x++) {
FFTSample u = coeffs[m].val[x];
i = coeffs[m].start + x;
a.re += u * src[i].re;
a.im += u * src[i].im;
}
m++;
for (x = 0; x < coeffs[m].len; x++) {
FFTSample u = coeffs[m].val[x];
i = coeffs[m].start + x;
b.re += u * src[i].re;
b.im += u * src[i].im;
}
/* separate left and right, (and multiply by 2.0) */
l.re = a.re + b.re;
l.im = a.im - b.im;
r.re = b.im + a.im;
r.im = b.re - a.re;
dst[k].re = l.re * l.re + l.im * l.im;
dst[k].im = r.re * r.re + r.im * r.im;
}
}
#endif
static int init_cqt(ShowCQTContext *s)
{
const char *var_names[] = { "timeclamp", "tc", "frequency", "freq", "f", NULL };
AVExpr *expr = NULL;
int rate = s->ctx->inputs[0]->sample_rate;
int nb_cqt_coeffs = 0, nb_cqt_coeffs_r = 0;
int k, x, ret;
if ((ret = av_expr_parse(&expr, s->tlength, var_names, NULL, NULL, NULL, NULL, 0, s->ctx)) < 0)
goto error;
ret = AVERROR(ENOMEM);
if (!(s->coeffs = av_calloc(s->cqt_len * 2, sizeof(*s->coeffs))))
goto error;
for (k = 0; k < s->cqt_len; k++) {
double vars[] = { s->timeclamp, s->timeclamp, s->freq[k], s->freq[k], s->freq[k] };
double flen, center, tlength;
int start, end, m = (s->cqt_coeffs_type == COEFFS_TYPE_INTERLEAVE) ? (2 * k) : k;
if (s->freq[k] > 0.5 * rate)
continue;
tlength = clip_with_log(s->ctx, "tlength", av_expr_eval(expr, vars, NULL),
TLENGTH_MIN, s->timeclamp, s->timeclamp, k);
flen = 8.0 * s->fft_len / (tlength * rate);
center = s->freq[k] * s->fft_len / rate;
start = FFMAX(0, ceil(center - 0.5 * flen));
end = FFMIN(s->fft_len, floor(center + 0.5 * flen));
s->coeffs[m].start = start & ~(s->cqt_align - 1);
s->coeffs[m].len = (end | (s->cqt_align - 1)) + 1 - s->coeffs[m].start;
nb_cqt_coeffs += s->coeffs[m].len;
if (!(s->coeffs[m].val = av_calloc(s->coeffs[m].len, sizeof(*s->coeffs[m].val))))
goto error;
if (s->cqt_coeffs_type == COEFFS_TYPE_INTERLEAVE) {
s->coeffs[m+1].start = (s->fft_len - end) & ~(s->cqt_align - 1);
s->coeffs[m+1].len = ((s->fft_len - start) | (s->cqt_align - 1)) + 1 - s->coeffs[m+1].start;
nb_cqt_coeffs_r += s->coeffs[m+1].len;
if (!(s->coeffs[m+1].val = av_calloc(s->coeffs[m+1].len, sizeof(*s->coeffs[m+1].val))))
goto error;
}
for (x = start; x <= end; x++) {
int sign = (x & 1) ? (-1) : 1;
double y = 2.0 * M_PI * (x - center) * (1.0 / flen);
/* nuttall window */
double w = 0.355768 + 0.487396 * cos(y) + 0.144232 * cos(2*y) + 0.012604 * cos(3*y);
w *= sign * (1.0 / s->fft_len);
s->coeffs[m].val[x - s->coeffs[m].start] = w;
if (s->cqt_coeffs_type == COEFFS_TYPE_INTERLEAVE)
s->coeffs[m+1].val[(s->fft_len - x) - s->coeffs[m+1].start] = w;
}
}
av_expr_free(expr);
if (s->cqt_coeffs_type == COEFFS_TYPE_DEFAULT)
av_log(s->ctx, AV_LOG_INFO, "nb_cqt_coeffs = %d.\n", nb_cqt_coeffs);
else
av_log(s->ctx, AV_LOG_INFO, "nb_cqt_coeffs = {%d,%d}.\n", nb_cqt_coeffs, nb_cqt_coeffs_r);
return 0;
error:
av_expr_free(expr);
if (s->coeffs)
for (k = 0; k < s->cqt_len * 2; k++)
av_freep(&s->coeffs[k].val);
av_freep(&s->coeffs);
return ret;
}
static AVFrame *alloc_frame_empty(enum AVPixelFormat format, int w, int h)
{
AVFrame *out;
out = av_frame_alloc();
if (!out)
return NULL;
out->format = format;
out->width = w;
out->height = h;
if (av_frame_get_buffer(out, 32) < 0) {
av_frame_free(&out);
return NULL;
}
if (format == AV_PIX_FMT_RGB24 || format == AV_PIX_FMT_RGBA) {
memset(out->data[0], 0, out->linesize[0] * h);
} else {
int hh = (format == AV_PIX_FMT_YUV420P || format == AV_PIX_FMT_YUVA420P) ? h / 2 : h;
memset(out->data[0], 16, out->linesize[0] * h);
memset(out->data[1], 128, out->linesize[1] * hh);
memset(out->data[2], 128, out->linesize[2] * hh);
if (out->data[3])
memset(out->data[3], 0, out->linesize[3] * h);
}
return out;
}
static enum AVPixelFormat convert_axis_pixel_format(enum AVPixelFormat format)
{
switch (format) {
case AV_PIX_FMT_RGB24: format = AV_PIX_FMT_RGBA; break;
case AV_PIX_FMT_YUV444P: format = AV_PIX_FMT_YUVA444P; break;
case AV_PIX_FMT_YUV422P: format = AV_PIX_FMT_YUVA422P; break;
case AV_PIX_FMT_YUV420P: format = AV_PIX_FMT_YUVA420P; break;
}
return format;
}
static int init_axis_empty(ShowCQTContext *s)
{
if (!(s->axis_frame = alloc_frame_empty(convert_axis_pixel_format(s->format), s->width, s->axis_h)))
return AVERROR(ENOMEM);
return 0;
}
static int init_axis_from_file(ShowCQTContext *s)
{
uint8_t *tmp_data[4] = { NULL };
int tmp_linesize[4];
enum AVPixelFormat tmp_format;
int tmp_w, tmp_h, ret;
if ((ret = ff_load_image(tmp_data, tmp_linesize, &tmp_w, &tmp_h, &tmp_format,
s->axisfile, s->ctx)) < 0)
goto error;
ret = AVERROR(ENOMEM);
if (!(s->axis_frame = av_frame_alloc()))
goto error;
if ((ret = ff_scale_image(s->axis_frame->data, s->axis_frame->linesize, s->width, s->axis_h,
convert_axis_pixel_format(s->format), tmp_data, tmp_linesize, tmp_w, tmp_h,
tmp_format, s->ctx)) < 0)
goto error;
s->axis_frame->width = s->width;
s->axis_frame->height = s->axis_h;
s->axis_frame->format = convert_axis_pixel_format(s->format);
av_freep(tmp_data);
return 0;
error:
av_frame_free(&s->axis_frame);
av_freep(tmp_data);
return ret;
}
static double midi(void *p, double f)
{
return log2(f/440.0) * 12.0 + 69.0;
}
static double r_func(void *p, double x)
{
x = av_clipd(x, 0.0, 1.0);
return (int)(x*255.0+0.5) << 16;
}
static double g_func(void *p, double x)
{
x = av_clipd(x, 0.0, 1.0);
return (int)(x*255.0+0.5) << 8;
}
static double b_func(void *p, double x)
{
x = av_clipd(x, 0.0, 1.0);
return (int)(x*255.0+0.5);
}
static int init_axis_color(ShowCQTContext *s, AVFrame *tmp)
{
const char *var_names[] = { "timeclamp", "tc", "frequency", "freq", "f", NULL };
const char *func_names[] = { "midi", "r", "g", "b", NULL };
double (*funcs[])(void *, double) = { midi, r_func, g_func, b_func };
AVExpr *expr = NULL;
double *freq = NULL;
int x, y, ret;
if (s->basefreq != (double) BASEFREQ || s->endfreq != (double) ENDFREQ) {
av_log(s->ctx, AV_LOG_WARNING, "font axis rendering is not implemented in non-default frequency range,"
" please use axisfile option instead.\n");
return AVERROR(EINVAL);
}
if (s->cqt_len == 1920)
freq = s->freq;
else if (!(freq = create_freq_table(s->basefreq, s->endfreq, 1920)))
return AVERROR(ENOMEM);
if ((ret = av_expr_parse(&expr, s->fontcolor, var_names, func_names, funcs, NULL, NULL, 0, s->ctx)) < 0) {
if (freq != s->freq)
av_freep(&freq);
return ret;
}
for (x = 0; x < 1920; x++) {
double vars[] = { s->timeclamp, s->timeclamp, freq[x], freq[x], freq[x] };
int color = (int) av_expr_eval(expr, vars, NULL);
uint8_t r = (color >> 16) & 0xFF, g = (color >> 8) & 0xFF, b = color & 0xFF;
uint8_t *data = tmp->data[0];
int linesize = tmp->linesize[0];
for (y = 0; y < 32; y++) {
data[linesize * y + 4 * x] = r;
data[linesize * y + 4 * x + 1] = g;
data[linesize * y + 4 * x + 2] = b;
data[linesize * y + 4 * x + 3] = 0;
}
}
av_expr_free(expr);
if (freq != s->freq)
av_freep(&freq);
return 0;
}
static int render_freetype(ShowCQTContext *s, AVFrame *tmp)
{
#if CONFIG_LIBFREETYPE
const char *str = "EF G A BC D ";
uint8_t *data = tmp->data[0];
int linesize = tmp->linesize[0];
FT_Library lib = NULL;
FT_Face face = NULL;
int font_width = 16, font_height = 32;
int font_repeat = font_width * 12;
int linear_hori_advance = font_width * 65536;
int non_monospace_warning = 0;
int x;
if (!s->fontfile)
return AVERROR(EINVAL);
if (FT_Init_FreeType(&lib))
goto fail;
if (FT_New_Face(lib, s->fontfile, 0, &face))
goto fail;
if (FT_Set_Char_Size(face, 16*64, 0, 0, 0))
goto fail;
if (FT_Load_Char(face, 'A', FT_LOAD_RENDER))
goto fail;
if (FT_Set_Char_Size(face, 16*64 * linear_hori_advance / face->glyph->linearHoriAdvance, 0, 0, 0))
goto fail;
for (x = 0; x < 12; x++) {
int sx, sy, rx, bx, by, dx, dy;
if (str[x] == ' ')
continue;
if (FT_Load_Char(face, str[x], FT_LOAD_RENDER))
goto fail;
if (face->glyph->advance.x != font_width*64 && !non_monospace_warning) {
av_log(s->ctx, AV_LOG_WARNING, "font is not monospace.\n");
non_monospace_warning = 1;
}
sy = font_height - 8 - face->glyph->bitmap_top;
for (rx = 0; rx < 10; rx++) {
sx = rx * font_repeat + x * font_width + face->glyph->bitmap_left;
for (by = 0; by < face->glyph->bitmap.rows; by++) {
dy = by + sy;
if (dy < 0)
continue;
if (dy >= font_height)
break;
for (bx = 0; bx < face->glyph->bitmap.width; bx++) {
dx = bx + sx;
if (dx < 0)
continue;
if (dx >= 1920)
break;
data[dy*linesize+4*dx+3] = face->glyph->bitmap.buffer[by*face->glyph->bitmap.width+bx];
}
}
}
}
FT_Done_Face(face);
FT_Done_FreeType(lib);
return 0;
fail:
av_log(s->ctx, AV_LOG_WARNING, "error while loading freetype font, using default font instead.\n");
FT_Done_Face(face);
FT_Done_FreeType(lib);
return AVERROR(EINVAL);
#else
if (s->fontfile)
av_log(s->ctx, AV_LOG_WARNING, "freetype is not available, ignoring fontfile option.\n");
return AVERROR(EINVAL);
#endif
}
static int render_default_font(AVFrame *tmp)
{
const char *str = "EF G A BC D ";
int x, u, v, mask;
uint8_t *data = tmp->data[0];
int linesize = tmp->linesize[0];
for (x = 0; x < 1920; x += 192) {
uint8_t *startptr = data + 4 * x;
for (u = 0; u < 12; u++) {
for (v = 0; v < 16; v++) {
uint8_t *p = startptr + 2 * v * linesize + 16 * 4 * u;
for (mask = 0x80; mask; mask >>= 1, p += 8) {
if (mask & avpriv_vga16_font[str[u] * 16 + v]) {
p[3] = 255;
p[7] = 255;
p[linesize+3] = 255;
p[linesize+7] = 255;
}
}
}
}
}
return 0;
}
static int init_axis_from_font(ShowCQTContext *s)
{
AVFrame *tmp = NULL;
int ret = AVERROR(ENOMEM);
if (!(tmp = alloc_frame_empty(AV_PIX_FMT_RGBA, 1920, 32)))
goto fail;
if (!(s->axis_frame = av_frame_alloc()))
goto fail;
if ((ret = init_axis_color(s, tmp)) < 0)
goto fail;
if (render_freetype(s, tmp) < 0 && (ret = render_default_font(tmp)) < 0)
goto fail;
if ((ret = ff_scale_image(s->axis_frame->data, s->axis_frame->linesize, s->width, s->axis_h,
convert_axis_pixel_format(s->format), tmp->data, tmp->linesize,
1920, 32, AV_PIX_FMT_RGBA, s->ctx)) < 0)
goto fail;
av_frame_free(&tmp);
s->axis_frame->width = s->width;
s->axis_frame->height = s->axis_h;
s->axis_frame->format = convert_axis_pixel_format(s->format);
return 0;
fail:
av_frame_free(&tmp);
av_frame_free(&s->axis_frame);
return ret;
}
static float calculate_gamma(float v, float g)
{
if (g == 1.0f)
return v;
if (g == 2.0f)
return sqrtf(v);
if (g == 3.0f)
return cbrtf(v);
if (g == 4.0f)
return sqrtf(sqrtf(v));
return expf(logf(v) / g);
}
static void rgb_from_cqt(ColorFloat *c, const FFTComplex *v, float g, int len)
{
int x;
for (x = 0; x < len; x++) {
c[x].rgb.r = 255.0f * calculate_gamma(FFMIN(1.0f, v[x].re), g);
c[x].rgb.g = 255.0f * calculate_gamma(FFMIN(1.0f, 0.5f * (v[x].re + v[x].im)), g);
c[x].rgb.b = 255.0f * calculate_gamma(FFMIN(1.0f, v[x].im), g);
}
}
static void yuv_from_cqt(ColorFloat *c, const FFTComplex *v, float gamma, int len)
{
int x;
for (x = 0; x < len; x++) {
float r, g, b;
r = calculate_gamma(FFMIN(1.0f, v[x].re), gamma);
g = calculate_gamma(FFMIN(1.0f, 0.5f * (v[x].re + v[x].im)), gamma);
b = calculate_gamma(FFMIN(1.0f, v[x].im), gamma);
c[x].yuv.y = 65.481f * r + 128.553f * g + 24.966f * b;
c[x].yuv.u = -37.797f * r - 74.203f * g + 112.0f * b;
c[x].yuv.v = 112.0f * r - 93.786f * g - 18.214 * b;
}
}
static void draw_bar_rgb(AVFrame *out, const float *h, const float *rcp_h,
const ColorFloat *c, int bar_h)
{
int x, y, w = out->width;
float mul, ht, rcp_bar_h = 1.0f / bar_h;
uint8_t *v = out->data[0], *lp;
int ls = out->linesize[0];
for (y = 0; y < bar_h; y++) {
ht = (bar_h - y) * rcp_bar_h;
lp = v + y * ls;
for (x = 0; x < w; x++) {
if (h[x] <= ht) {
*lp++ = 0;
*lp++ = 0;
*lp++ = 0;
} else {
mul = (h[x] - ht) * rcp_h[x];
*lp++ = mul * c[x].rgb.r + 0.5f;
*lp++ = mul * c[x].rgb.g + 0.5f;
*lp++ = mul * c[x].rgb.b + 0.5f;
}
}
}
}
static void draw_bar_yuv(AVFrame *out, const float *h, const float *rcp_h,
const ColorFloat *c, int bar_h)
{
int x, y, yh, w = out->width;
float mul, ht, rcp_bar_h = 1.0f / bar_h;
uint8_t *vy = out->data[0], *vu = out->data[1], *vv = out->data[2];
uint8_t *lpy, *lpu, *lpv;
int lsy = out->linesize[0], lsu = out->linesize[1], lsv = out->linesize[2];
int fmt = out->format;
for (y = 0; y < bar_h; y += 2) {
yh = (fmt == AV_PIX_FMT_YUV420P) ? y / 2 : y;
ht = (bar_h - y) * rcp_bar_h;
lpy = vy + y * lsy;
lpu = vu + yh * lsu;
lpv = vv + yh * lsv;
for (x = 0; x < w; x += 2) {
if (h[x] <= ht) {
*lpy++ = 16;
*lpu++ = 128;
*lpv++ = 128;
} else {
mul = (h[x] - ht) * rcp_h[x];
*lpy++ = mul * c[x].yuv.y + 16.5f;
*lpu++ = mul * c[x].yuv.u + 128.5f;
*lpv++ = mul * c[x].yuv.v + 128.5f;
}
/* u and v are skipped on yuv422p and yuv420p */
if (fmt == AV_PIX_FMT_YUV444P) {
if (h[x+1] <= ht) {
*lpy++ = 16;
*lpu++ = 128;
*lpv++ = 128;
} else {
mul = (h[x+1] - ht) * rcp_h[x+1];
*lpy++ = mul * c[x+1].yuv.y + 16.5f;
*lpu++ = mul * c[x+1].yuv.u + 128.5f;
*lpv++ = mul * c[x+1].yuv.v + 128.5f;
}
} else {
if (h[x+1] <= ht) {
*lpy++ = 16;
} else {
mul = (h[x+1] - ht) * rcp_h[x+1];
*lpy++ = mul * c[x+1].yuv.y + 16.5f;
}
}
}
ht = (bar_h - (y+1)) * rcp_bar_h;
lpy = vy + (y+1) * lsy;
lpu = vu + (y+1) * lsu;
lpv = vv + (y+1) * lsv;
for (x = 0; x < w; x += 2) {
/* u and v are skipped on yuv420p */
if (fmt != AV_PIX_FMT_YUV420P) {
if (h[x] <= ht) {
*lpy++ = 16;
*lpu++ = 128;
*lpv++ = 128;
} else {
mul = (h[x] - ht) * rcp_h[x];
*lpy++ = mul * c[x].yuv.y + 16.5f;
*lpu++ = mul * c[x].yuv.u + 128.5f;
*lpv++ = mul * c[x].yuv.v + 128.5f;
}
} else {
if (h[x] <= ht) {
*lpy++ = 16;
} else {
mul = (h[x] - ht) * rcp_h[x];
*lpy++ = mul * c[x].yuv.y + 16.5f;
}
}
/* u and v are skipped on yuv422p and yuv420p */
if (out->format == AV_PIX_FMT_YUV444P) {
if (h[x+1] <= ht) {
*lpy++ = 16;
*lpu++ = 128;
*lpv++ = 128;
} else {
mul = (h[x+1] - ht) * rcp_h[x+1];
*lpy++ = mul * c[x+1].yuv.y + 16.5f;
*lpu++ = mul * c[x+1].yuv.u + 128.5f;
*lpv++ = mul * c[x+1].yuv.v + 128.5f;
}
} else {
if (h[x+1] <= ht) {
*lpy++ = 16;
} else {
mul = (h[x+1] - ht) * rcp_h[x+1];
*lpy++ = mul * c[x+1].yuv.y + 16.5f;
}
}
}
}
}
static void draw_axis_rgb(AVFrame *out, AVFrame *axis, const ColorFloat *c, int off)
{
int x, y, w = axis->width, h = axis->height;
float a, rcp_255 = 1.0f / 255.0f;
uint8_t *lp, *lpa;
for (y = 0; y < h; y++) {
lp = out->data[0] + (off + y) * out->linesize[0];
lpa = axis->data[0] + y * axis->linesize[0];
for (x = 0; x < w; x++) {
a = rcp_255 * lpa[3];
*lp++ = a * lpa[0] + (1.0f - a) * c[x].rgb.r + 0.5f;
*lp++ = a * lpa[1] + (1.0f - a) * c[x].rgb.g + 0.5f;
*lp++ = a * lpa[2] + (1.0f - a) * c[x].rgb.b + 0.5f;
lpa += 4;
}
}
}
static void draw_axis_yuv(AVFrame *out, AVFrame *axis, const ColorFloat *c, int off)
{
int fmt = out->format, x, y, yh, w = axis->width, h = axis->height;
int offh = (fmt == AV_PIX_FMT_YUV420P) ? off / 2 : off;
float a, rcp_255 = 1.0f / 255.0f;
uint8_t *vy = out->data[0], *vu = out->data[1], *vv = out->data[2];
uint8_t *vay = axis->data[0], *vau = axis->data[1], *vav = axis->data[2], *vaa = axis->data[3];
int lsy = out->linesize[0], lsu = out->linesize[1], lsv = out->linesize[2];
int lsay = axis->linesize[0], lsau = axis->linesize[1], lsav = axis->linesize[2], lsaa = axis->linesize[3];
uint8_t *lpy, *lpu, *lpv, *lpay, *lpau, *lpav, *lpaa;
for (y = 0; y < h; y += 2) {
yh = (fmt == AV_PIX_FMT_YUV420P) ? y / 2 : y;
lpy = vy + (off + y) * lsy;
lpu = vu + (offh + yh) * lsu;
lpv = vv + (offh + yh) * lsv;
lpay = vay + y * lsay;
lpau = vau + yh * lsau;
lpav = vav + yh * lsav;
lpaa = vaa + y * lsaa;
for (x = 0; x < w; x += 2) {
a = rcp_255 * (*lpaa++);
*lpy++ = a * (*lpay++) + (1.0f - a) * (c[x].yuv.y + 16.0f) + 0.5f;
*lpu++ = a * (*lpau++) + (1.0f - a) * (c[x].yuv.u + 128.0f) + 0.5f;
*lpv++ = a * (*lpav++) + (1.0f - a) * (c[x].yuv.v + 128.0f) + 0.5f;
/* u and v are skipped on yuv422p and yuv420p */
a = rcp_255 * (*lpaa++);
*lpy++ = a * (*lpay++) + (1.0f - a) * (c[x+1].yuv.y + 16.0f) + 0.5f;
if (fmt == AV_PIX_FMT_YUV444P) {
*lpu++ = a * (*lpau++) + (1.0f - a) * (c[x+1].yuv.u + 128.0f) + 0.5f;
*lpv++ = a * (*lpav++) + (1.0f - a) * (c[x+1].yuv.v + 128.0f) + 0.5f;
}
}
lpy = vy + (off + y + 1) * lsy;
lpu = vu + (off + y + 1) * lsu;
lpv = vv + (off + y + 1) * lsv;
lpay = vay + (y + 1) * lsay;
lpau = vau + (y + 1) * lsau;
lpav = vav + (y + 1) * lsav;
lpaa = vaa + (y + 1) * lsaa;
for (x = 0; x < out->width; x += 2) {
/* u and v are skipped on yuv420p */
a = rcp_255 * (*lpaa++);
*lpy++ = a * (*lpay++) + (1.0f - a) * (c[x].yuv.y + 16.0f) + 0.5f;
if (fmt != AV_PIX_FMT_YUV420P) {
*lpu++ = a * (*lpau++) + (1.0f - a) * (c[x].yuv.u + 128.0f) + 0.5f;
*lpv++ = a * (*lpav++) + (1.0f - a) * (c[x].yuv.v + 128.0f) + 0.5f;
}
/* u and v are skipped on yuv422p and yuv420p */
a = rcp_255 * (*lpaa++);
*lpy++ = a * (*lpay++) + (1.0f - a) * (c[x+1].yuv.y + 16.0f) + 0.5f;
if (fmt == AV_PIX_FMT_YUV444P) {
*lpu++ = a * (*lpau++) + (1.0f - a) * (c[x+1].yuv.u + 128.0f) + 0.5f;
*lpv++ = a * (*lpav++) + (1.0f - a) * (c[x+1].yuv.v + 128.0f) + 0.5f;
}
}
}
}
static void draw_sono(AVFrame *out, AVFrame *sono, int off, int idx)
{
int fmt = out->format, h = sono->height;
int nb_planes = (fmt == AV_PIX_FMT_RGB24) ? 1 : 3;
int offh = (fmt == AV_PIX_FMT_YUV420P) ? off / 2 : off;
int inc = (fmt == AV_PIX_FMT_YUV420P) ? 2 : 1;
int ls, i, y, yh;
ls = FFMIN(out->linesize[0], sono->linesize[0]);
for (y = 0; y < h; y++) {
memcpy(out->data[0] + (off + y) * out->linesize[0],
sono->data[0] + (idx + y) % h * sono->linesize[0], ls);
}
for (i = 1; i < nb_planes; i++) {
ls = FFMIN(out->linesize[i], sono->linesize[i]);
for (y = 0; y < h; y += inc) {
yh = (fmt == AV_PIX_FMT_YUV420P) ? y / 2 : y;
memcpy(out->data[i] + (offh + yh) * out->linesize[i],
sono->data[i] + (idx + y) % h * sono->linesize[i], ls);
}
}
}
static void update_sono_rgb(AVFrame *sono, const ColorFloat *c, int idx)
{
int x, w = sono->width;
uint8_t *lp = sono->data[0] + idx * sono->linesize[0];
for (x = 0; x < w; x++) {
*lp++ = c[x].rgb.r + 0.5f;
*lp++ = c[x].rgb.g + 0.5f;
*lp++ = c[x].rgb.b + 0.5f;
}
}
static void update_sono_yuv(AVFrame *sono, const ColorFloat *c, int idx)
{
int x, fmt = sono->format, w = sono->width;
uint8_t *lpy = sono->data[0] + idx * sono->linesize[0];
uint8_t *lpu = sono->data[1] + idx * sono->linesize[1];
uint8_t *lpv = sono->data[2] + idx * sono->linesize[2];
for (x = 0; x < w; x += 2) {
*lpy++ = c[x].yuv.y + 16.5f;
*lpu++ = c[x].yuv.u + 128.5f;
*lpv++ = c[x].yuv.v + 128.5f;
*lpy++ = c[x+1].yuv.y + 16.5f;
if (fmt == AV_PIX_FMT_YUV444P) {
*lpu++ = c[x+1].yuv.u + 128.5f;
*lpv++ = c[x+1].yuv.v + 128.5f;
}
}
}
static void process_cqt(ShowCQTContext *s)
{
int x, i;
if (!s->sono_count) {
for (x = 0; x < s->cqt_len; x++) {
s->h_buf[x] = s->bar_v_buf[x] * 0.5f * (s->cqt_result[x].re + s->cqt_result[x].im);
}
if (s->fcount > 1) {
float rcp_fcount = 1.0f / s->fcount;
for (x = 0; x < s->width; x++) {
float h = 0.0f;
for (i = 0; i < s->fcount; i++)
h += s->h_buf[s->fcount * x + i];
s->h_buf[x] = rcp_fcount * h;
}
}
for (x = 0; x < s->width; x++) {
s->h_buf[x] = calculate_gamma(s->h_buf[x], s->bar_g);
s->rcp_h_buf[x] = 1.0f / (s->h_buf[x] + 0.0001f);
}
}
for (x = 0; x < s->cqt_len; x++) {
s->cqt_result[x].re *= s->sono_v_buf[x];
s->cqt_result[x].im *= s->sono_v_buf[x];
}
if (s->fcount > 1) {
float rcp_fcount = 1.0f / s->fcount;
for (x = 0; x < s->width; x++) {
FFTComplex result = {0.0f, 0.0f};
for (i = 0; i < s->fcount; i++) {
result.re += s->cqt_result[s->fcount * x + i].re;
result.im += s->cqt_result[s->fcount * x + i].im;
}
s->cqt_result[x].re = rcp_fcount * result.re;
s->cqt_result[x].im = rcp_fcount * result.im;
}
}
if (s->format == AV_PIX_FMT_RGB24)
rgb_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width);
else
yuv_from_cqt(s->c_buf, s->cqt_result, s->sono_g, s->width);
}
static int plot_cqt(AVFilterContext *ctx)
{
AVFilterLink *outlink = ctx->outputs[0];
ShowCQTContext *s = ctx->priv;
int ret = 0;
memcpy(s->fft_result, s->fft_data, s->fft_len * sizeof(*s->fft_data));
av_fft_permute(s->fft_ctx, s->fft_result);
av_fft_calc(s->fft_ctx, s->fft_result);
s->fft_result[s->fft_len] = s->fft_result[0];
s->cqt_calc(s->cqt_result, s->fft_result, s->coeffs, s->cqt_len, s->fft_len);
process_cqt(s);
if (s->sono_h)
s->update_sono(s->sono_frame, s->c_buf, s->sono_idx);
if (!s->sono_count) {
AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
if (s->bar_h)
s->draw_bar(out, s->h_buf, s->rcp_h_buf, s->c_buf, s->bar_h);
if (s->axis_h)
s->draw_axis(out, s->axis_frame, s->c_buf, s->bar_h);
if (s->sono_h)
s->draw_sono(out, s->sono_frame, s->bar_h + s->axis_h, s->sono_idx);
out->pts = s->frame_count;
ret = ff_filter_frame(outlink, out);
s->frame_count++;
}
s->sono_count = (s->sono_count + 1) % s->count;
if (s->sono_h)
s->sono_idx = (s->sono_idx + s->sono_h - 1) % s->sono_h;
return ret;
}
/* main filter control */
static av_cold int init(AVFilterContext *ctx)
{
ShowCQTContext *s = ctx->priv;
s->ctx = ctx;
if (!s->fullhd) {
av_log(ctx, AV_LOG_WARNING, "fullhd option is deprecated, use size/s option instead.\n");
if (s->width != 1920 || s->height != 1080) {
av_log(ctx, AV_LOG_ERROR, "fullhd set to 0 but with custom dimension.\n");
return AVERROR(EINVAL);
}
s->width /= 2;
s->height /= 2;
s->fullhd = 1;
}
if (s->axis_h < 0) {
s->axis_h = s->width / 60;
if (s->axis_h & 1)
s->axis_h++;
if (s->bar_h >= 0 && s->sono_h >= 0)
s->axis_h = s->height - s->bar_h - s->sono_h;
if (s->bar_h >= 0 && s->sono_h < 0)
s->axis_h = FFMIN(s->axis_h, s->height - s->bar_h);
if (s->bar_h < 0 && s->sono_h >= 0)
s->axis_h = FFMIN(s->axis_h, s->height - s->sono_h);
}
if (s->bar_h < 0) {
s->bar_h = (s->height - s->axis_h) / 2;
if (s->bar_h & 1)
s->bar_h--;
if (s->sono_h >= 0)
s->bar_h = s->height - s->sono_h - s->axis_h;
}
if (s->sono_h < 0)
s->sono_h = s->height - s->axis_h - s->bar_h;
if ((s->width & 1) || (s->height & 1) || (s->bar_h & 1) || (s->axis_h & 1) || (s->sono_h & 1) ||
(s->bar_h < 0) || (s->axis_h < 0) || (s->sono_h < 0) || (s->bar_h > s->height) ||
(s->axis_h > s->height) || (s->sono_h > s->height) || (s->bar_h + s->axis_h + s->sono_h != s->height)) {
av_log(ctx, AV_LOG_ERROR, "invalid dimension.\n");
return AVERROR(EINVAL);
}
if (!s->fcount) {
do {
s->fcount++;
} while(s->fcount * s->width < 1920 && s->fcount < 10);
}
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
common_uninit(ctx->priv);
}
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *formats = NULL;
AVFilterChannelLayouts *layouts = NULL;
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };
enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE
};
int64_t channel_layouts[] = { AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_STEREO_DOWNMIX, -1 };
int ret;
/* set input audio formats */
formats = ff_make_format_list(sample_fmts);
if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)
return ret;
layouts = avfilter_make_format64_list(channel_layouts);
if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)
return ret;
formats = ff_all_samplerates();
if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
return ret;
/* set output video format */
formats = ff_make_format_list(pix_fmts);
if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
return ret;
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ShowCQTContext *s = ctx->priv;
int ret;
common_uninit(s);
outlink->w = s->width;
outlink->h = s->height;
s->format = outlink->format;
outlink->sample_aspect_ratio = av_make_q(1, 1);
outlink->frame_rate = s->rate;
outlink->time_base = av_inv_q(s->rate);
av_log(ctx, AV_LOG_INFO, "video: %dx%d %s %d/%d fps, bar_h = %d, axis_h = %d, sono_h = %d.\n",
s->width, s->height, av_get_pix_fmt_name(s->format), s->rate.num, s->rate.den,
s->bar_h, s->axis_h, s->sono_h);
s->cqt_len = s->width * s->fcount;
if (!(s->freq = create_freq_table(s->basefreq, s->endfreq, s->cqt_len)))
return AVERROR(ENOMEM);
if ((ret = init_volume(s)) < 0)
return ret;
s->fft_bits = ceil(log2(inlink->sample_rate * s->timeclamp));
s->fft_len = 1 << s->fft_bits;
av_log(ctx, AV_LOG_INFO, "fft_len = %d, cqt_len = %d.\n", s->fft_len, s->cqt_len);
s->fft_ctx = av_fft_init(s->fft_bits, 0);
s->fft_data = av_calloc(s->fft_len, sizeof(*s->fft_data));
s->fft_result = av_calloc(s->fft_len + 64, sizeof(*s->fft_result));
s->cqt_result = av_malloc_array(s->cqt_len, sizeof(*s->cqt_result));
if (!s->fft_ctx || !s->fft_data || !s->fft_result || !s->cqt_result)
return AVERROR(ENOMEM);
s->cqt_align = 1;
s->cqt_coeffs_type = COEFFS_TYPE_DEFAULT;
s->cqt_calc = cqt_calc;
s->draw_sono = draw_sono;
if (s->format == AV_PIX_FMT_RGB24) {
s->draw_bar = draw_bar_rgb;
s->draw_axis = draw_axis_rgb;
s->update_sono = update_sono_rgb;
} else {
s->draw_bar = draw_bar_yuv;
s->draw_axis = draw_axis_yuv;
s->update_sono = update_sono_yuv;
}
if ((ret = init_cqt(s)) < 0)
return ret;
if (s->axis_h) {
if (!s->axis) {
if ((ret = init_axis_empty(s)) < 0)
return ret;
} else if (s->axisfile) {
if (init_axis_from_file(s) < 0) {
av_log(ctx, AV_LOG_WARNING, "loading axis image failed, fallback to font rendering.\n");
if (init_axis_from_font(s) < 0) {
av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");
if ((ret = init_axis_empty(s)) < 0)
return ret;
}
}
} else {
if (init_axis_from_font(s) < 0) {
av_log(ctx, AV_LOG_WARNING, "loading axis font failed, disable text drawing.\n");
if ((ret = init_axis_empty(s)) < 0)
return ret;
}
}
}
if (s->sono_h) {
s->sono_frame = alloc_frame_empty((outlink->format == AV_PIX_FMT_YUV420P) ?
AV_PIX_FMT_YUV422P : outlink->format, s->width, s->sono_h);
if (!s->sono_frame)
return AVERROR(ENOMEM);
}
s->h_buf = av_malloc_array(s->cqt_len, sizeof (*s->h_buf));
s->rcp_h_buf = av_malloc_array(s->width, sizeof(*s->rcp_h_buf));
s->c_buf = av_malloc_array(s->width, sizeof(*s->c_buf));
if (!s->h_buf || !s->rcp_h_buf || !s->c_buf)
return AVERROR(ENOMEM);
s->sono_count = 0;
s->frame_count = 0;
s->sono_idx = 0;
s->remaining_fill = s->fft_len / 2;
s->remaining_frac = 0;
s->step_frac = av_div_q(av_make_q(inlink->sample_rate, s->count) , s->rate);
s->step = (int)(s->step_frac.num / s->step_frac.den);
s->step_frac.num %= s->step_frac.den;
if (s->step_frac.num) {
av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d + %d/%d.\n",
inlink->sample_rate, s->step, s->step_frac.num, s->step_frac.den);
av_log(ctx, AV_LOG_WARNING, "fractional step.\n");
} else {
av_log(ctx, AV_LOG_INFO, "audio: %d Hz, step = %d.\n",
inlink->sample_rate, s->step);
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
{
AVFilterContext *ctx = inlink->dst;
ShowCQTContext *s = ctx->priv;
int remaining, step, ret, x, i, j, m;
float *audio_data;
if (!insamples) {
while (s->remaining_fill < s->fft_len / 2) {
memset(&s->fft_data[s->fft_len - s->remaining_fill], 0, sizeof(*s->fft_data) * s->remaining_fill);
ret = plot_cqt(ctx);
if (ret < 0)
return ret;
step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;
s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;
for (x = 0; x < (s->fft_len-step); x++)
s->fft_data[x] = s->fft_data[x+step];
s->remaining_fill += step;
}
return AVERROR_EOF;
}
remaining = insamples->nb_samples;
audio_data = (float*) insamples->data[0];
while (remaining) {
i = insamples->nb_samples - remaining;
j = s->fft_len - s->remaining_fill;
if (remaining >= s->remaining_fill) {
for (m = 0; m < s->remaining_fill; m++) {
s->fft_data[j+m].re = audio_data[2*(i+m)];
s->fft_data[j+m].im = audio_data[2*(i+m)+1];
}
ret = plot_cqt(ctx);
if (ret < 0) {
av_frame_free(&insamples);
return ret;
}
remaining -= s->remaining_fill;
step = s->step + (s->step_frac.num + s->remaining_frac) / s->step_frac.den;
s->remaining_frac = (s->step_frac.num + s->remaining_frac) % s->step_frac.den;
for (m = 0; m < s->fft_len-step; m++)
s->fft_data[m] = s->fft_data[m+step];
s->remaining_fill = step;
} else {
for (m = 0; m < remaining; m++) {
s->fft_data[j+m].re = audio_data[2*(i+m)];
s->fft_data[j+m].im = audio_data[2*(i+m)+1];
}
s->remaining_fill -= remaining;
remaining = 0;
}
}
av_frame_free(&insamples);
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterLink *inlink = outlink->src->inputs[0];
int ret;
ret = ff_request_frame(inlink);
if (ret == AVERROR_EOF)
filter_frame(inlink, NULL);
return ret;
}
static const AVFilterPad showcqt_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad showcqt_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
};
AVFilter ff_avf_showcqt = {
.name = "showcqt",
.description = NULL_IF_CONFIG_SMALL("Convert input audio to a CQT (Constant/Clamped Q Transform) spectrum video output."),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.priv_size = sizeof(ShowCQTContext),
.inputs = showcqt_inputs,
.outputs = showcqt_outputs,
.priv_class = &showcqt_class,
};