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cava.c
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cava.c
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#include <locale.h>
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#else
#include <stdlib.h>
#endif
#include <fcntl.h>
#include <math.h>
#ifndef M_PI
#define M_PI 3.1415926535897932385
#endif
#define MAX_BARS 1024
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <ctype.h>
#include <dirent.h>
#include <fftw3.h>
#include <getopt.h>
#include <pthread.h>
#include <signal.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "config.h"
#include "debug.h"
#include "util.h"
#ifdef NCURSES
#include "output/terminal_bcircle.h"
#include "output/terminal_ncurses.h"
#include <curses.h>
#endif
#ifdef SDL
#include "output/sdl_cava.h"
#endif
#include "output/raw.h"
#include "output/terminal_noncurses.h"
#include "input/alsa.h"
#include "input/common.h"
#include "input/fifo.h"
#include "input/portaudio.h"
#include "input/pulse.h"
#include "input/shmem.h"
#include "input/sndio.h"
#ifdef __GNUC__
// curses.h or other sources may already define
#undef GCC_UNUSED
#define GCC_UNUSED __attribute__((unused))
#else
#define GCC_UNUSED /* nothing */
#endif
pthread_mutex_t lock;
// used by sig handler
// needs to know output mode in order to clean up terminal
int output_mode;
// whether we should reload the config or not
int should_reload = 0;
// whether we should only reload colors or not
int reload_colors = 0;
// whether we should quit
int should_quit = 0;
// these variables are used only in main, but making them global
// will allow us to not free them on exit without ASan complaining
struct config_params p;
fftw_complex *out_bass_l, *out_bass_r;
fftw_plan p_bass_l, p_bass_r;
fftw_complex *out_mid_l, *out_mid_r;
fftw_plan p_mid_l, p_mid_r;
fftw_complex *out_treble_l, *out_treble_r;
fftw_plan p_treble_l, p_treble_r;
// general: cleanup
void cleanup(void) {
if (output_mode == OUTPUT_NCURSES) {
#ifdef NCURSES
cleanup_terminal_ncurses();
#else
;
#endif
} else if (output_mode == OUTPUT_NONCURSES) {
cleanup_terminal_noncurses();
} else if (output_mode == OUTPUT_SDL) {
#ifdef SDL
cleanup_sdl();
#else
;
#endif
}
}
// general: handle signals
void sig_handler(int sig_no) {
if (sig_no == SIGUSR1) {
should_reload = 1;
return;
}
if (sig_no == SIGUSR2) {
reload_colors = 1;
return;
}
cleanup();
if (sig_no == SIGINT) {
printf("CTRL-C pressed -- goodbye\n");
}
signal(sig_no, SIG_DFL);
raise(sig_no);
}
#ifdef ALSA
static bool is_loop_device_for_sure(const char *text) {
const char *const LOOPBACK_DEVICE_PREFIX = "hw:Loopback,";
return strncmp(text, LOOPBACK_DEVICE_PREFIX, strlen(LOOPBACK_DEVICE_PREFIX)) == 0;
}
static bool directory_exists(const char *path) {
DIR *const dir = opendir(path);
if (dir == NULL)
return false;
closedir(dir);
return true;
}
#endif
int *monstercat_filter(int *bars, int number_of_bars, int waves, double monstercat) {
int z;
// process [smoothing]: monstercat-style "average"
int m_y, de;
if (waves > 0) {
for (z = 0; z < number_of_bars; z++) { // waves
bars[z] = bars[z] / 1.25;
// if (bars[z] < 1) bars[z] = 1;
for (m_y = z - 1; m_y >= 0; m_y--) {
de = z - m_y;
bars[m_y] = max(bars[z] - pow(de, 2), bars[m_y]);
}
for (m_y = z + 1; m_y < number_of_bars; m_y++) {
de = m_y - z;
bars[m_y] = max(bars[z] - pow(de, 2), bars[m_y]);
}
}
} else if (monstercat > 0) {
for (z = 0; z < number_of_bars; z++) {
// if (bars[z] < 1)bars[z] = 1;
for (m_y = z - 1; m_y >= 0; m_y--) {
de = z - m_y;
bars[m_y] = max(bars[z] / pow(monstercat, de), bars[m_y]);
}
for (m_y = z + 1; m_y < number_of_bars; m_y++) {
de = m_y - z;
bars[m_y] = max(bars[z] / pow(monstercat, de), bars[m_y]);
}
}
}
return bars;
}
// general: entry point
int main(int argc, char **argv) {
// general: console title
printf("%c]0;%s%c", '\033', PACKAGE, '\007');
// general: handle command-line arguments
char configPath[PATH_MAX];
configPath[0] = '\0';
// general: handle Ctrl+C
struct sigaction action;
memset(&action, 0, sizeof(action));
action.sa_handler = &sig_handler;
sigaction(SIGINT, &action, NULL);
sigaction(SIGTERM, &action, NULL);
sigaction(SIGUSR1, &action, NULL);
sigaction(SIGUSR2, &action, NULL);
char *usage = "\n\
Usage : " PACKAGE " [options]\n\
Visualize audio input in terminal. \n\
\n\
Options:\n\
-p path to config file\n\
-v print version\n\
\n\
Keys:\n\
Up Increase sensitivity\n\
Down Decrease sensitivity\n\
Left Decrease number of bars\n\
Right Increase number of bars\n\
r Reload config\n\
c Reload colors only\n\
f Cycle foreground color\n\
b Cycle background color\n\
q Quit\n\
\n\
as of 0.4.0 all options are specified in config file, see in '/home/username/.config/cava/' \n";
int c;
while ((c = getopt(argc, argv, "p:vh")) != -1) {
switch (c) {
case 'p': // argument: fifo path
snprintf(configPath, sizeof(configPath), "%s", optarg);
break;
case 'h': // argument: print usage
printf("%s", usage);
return 1;
case '?': // argument: print usage
printf("%s", usage);
return 1;
case 'v': // argument: print version
printf(PACKAGE " " VERSION "\n");
return 0;
default: // argument: no arguments; exit
abort();
}
}
// general: main loop
while (1) {
debug("loading config\n");
// config: load
struct error_s error;
error.length = 0;
if (!load_config(configPath, &p, 0, &error)) {
fprintf(stderr, "Error loading config. %s", error.message);
exit(EXIT_FAILURE);
}
bool first = true;
int inAtty;
output_mode = p.output;
if (output_mode != OUTPUT_RAW) {
// Check if we're running in a tty
inAtty = 0;
if (strncmp(ttyname(0), "/dev/tty", 8) == 0 || strcmp(ttyname(0), "/dev/console") == 0)
inAtty = 1;
// in macos vitual terminals are called ttys(xyz) and there are no ttys
if (strncmp(ttyname(0), "/dev/ttys", 9) == 0)
inAtty = 0;
if (inAtty) {
// checking if cava psf font is installed in FONTDIR
FILE *font_file;
font_file = fopen(FONTDIR "/cava.psf", "r");
if (font_file) {
fclose(font_file);
system("setfont " FONTDIR "/cava.psf >/dev/null 2>&1");
} else {
// if not it might still be available, we dont know, must try
system("setfont cava.psf >/dev/null 2>&1");
}
system("setterm -blank 0");
}
// We use unicode block characters to draw the bars and
// the locale var LANG must be set to use unicode chars.
// For some reason this var can't be retrieved with
// setlocale(LANG, NULL), so we get it with getenv.
// Also we can't set it with setlocale(LANG "") so we
// must set LC_ALL instead.
// Attempting to set to en_US if not set, if that lang
// is not installed and LANG is not set there will be
// no output, for more info see #109 #344
if (!getenv("LANG"))
setlocale(LC_ALL, "en_US.utf8");
else
setlocale(LC_ALL, "");
}
// input: init
int *bars_left, *bars_right;
double *temp_l, *temp_r;
int bass_cut_off = 150;
int treble_cut_off = 2500;
struct audio_data audio;
memset(&audio, 0, sizeof(audio));
audio.source = malloc(1 + strlen(p.audio_source));
strcpy(audio.source, p.audio_source);
audio.format = -1;
audio.rate = 0;
audio.FFTbassbufferSize = MAX_BARS * 4;
audio.FFTmidbufferSize = MAX_BARS * 2;
audio.FFTtreblebufferSize = MAX_BARS;
audio.terminate = 0;
if (p.stereo)
audio.channels = 2;
if (!p.stereo)
audio.channels = 1;
audio.average = false;
audio.left = false;
audio.right = false;
if (strcmp(p.mono_option, "average") == 0)
audio.average = true;
if (strcmp(p.mono_option, "left") == 0)
audio.left = true;
if (strcmp(p.mono_option, "right") == 0)
audio.right = true;
audio.bass_index = 0;
audio.mid_index = 0;
audio.treble_index = 0;
audio.bass_multiplier = (double *)malloc(audio.FFTbassbufferSize * sizeof(double));
audio.mid_multiplier = (double *)malloc(audio.FFTmidbufferSize * sizeof(double));
audio.treble_multiplier = (double *)malloc(audio.FFTtreblebufferSize * sizeof(double));
temp_l = (double *)malloc((audio.FFTbassbufferSize / 2 + 1) * sizeof(double));
temp_r = (double *)malloc((audio.FFTbassbufferSize / 2 + 1) * sizeof(double));
bars_left = (int *)malloc(MAX_BARS * sizeof(int));
bars_right = (int *)malloc(MAX_BARS * sizeof(int));
for (int i = 0; i < audio.FFTbassbufferSize; i++) {
audio.bass_multiplier[i] =
0.5 * (1 - cos(2 * M_PI * i / (audio.FFTbassbufferSize - 1)));
}
for (int i = 0; i < audio.FFTmidbufferSize; i++) {
audio.mid_multiplier[i] = 0.5 * (1 - cos(2 * M_PI * i / (audio.FFTmidbufferSize - 1)));
}
for (int i = 0; i < audio.FFTtreblebufferSize; i++) {
audio.treble_multiplier[i] =
0.5 * (1 - cos(2 * M_PI * i / (audio.FFTtreblebufferSize - 1)));
}
// BASS
// audio.FFTbassbufferSize = audio.rate / 20; // audio.FFTbassbufferSize;
audio.in_bass_r = fftw_alloc_real(audio.FFTbassbufferSize);
audio.in_bass_l = fftw_alloc_real(audio.FFTbassbufferSize);
audio.in_bass_r_raw = fftw_alloc_real(audio.FFTbassbufferSize);
audio.in_bass_l_raw = fftw_alloc_real(audio.FFTbassbufferSize);
out_bass_l = fftw_alloc_complex(audio.FFTbassbufferSize / 2 + 1);
out_bass_r = fftw_alloc_complex(audio.FFTbassbufferSize / 2 + 1);
memset(out_bass_l, 0, (audio.FFTbassbufferSize / 2 + 1) * sizeof(fftw_complex));
memset(out_bass_r, 0, (audio.FFTbassbufferSize / 2 + 1) * sizeof(fftw_complex));
p_bass_l = fftw_plan_dft_r2c_1d(audio.FFTbassbufferSize, audio.in_bass_l, out_bass_l,
FFTW_MEASURE);
p_bass_r = fftw_plan_dft_r2c_1d(audio.FFTbassbufferSize, audio.in_bass_r, out_bass_r,
FFTW_MEASURE);
// MID
// audio.FFTmidbufferSize = audio.rate / bass_cut_off; // audio.FFTbassbufferSize;
audio.in_mid_r = fftw_alloc_real(audio.FFTmidbufferSize);
audio.in_mid_l = fftw_alloc_real(audio.FFTmidbufferSize);
audio.in_mid_r_raw = fftw_alloc_real(audio.FFTmidbufferSize);
audio.in_mid_l_raw = fftw_alloc_real(audio.FFTmidbufferSize);
out_mid_l = fftw_alloc_complex(audio.FFTmidbufferSize / 2 + 1);
out_mid_r = fftw_alloc_complex(audio.FFTmidbufferSize / 2 + 1);
memset(out_mid_l, 0, (audio.FFTmidbufferSize / 2 + 1) * sizeof(fftw_complex));
memset(out_mid_r, 0, (audio.FFTmidbufferSize / 2 + 1) * sizeof(fftw_complex));
p_mid_l =
fftw_plan_dft_r2c_1d(audio.FFTmidbufferSize, audio.in_mid_l, out_mid_l, FFTW_MEASURE);
p_mid_r =
fftw_plan_dft_r2c_1d(audio.FFTmidbufferSize, audio.in_mid_r, out_mid_r, FFTW_MEASURE);
// TRIEBLE
// audio.FFTtreblebufferSize = audio.rate / treble_cut_off; // audio.FFTbassbufferSize;
audio.in_treble_r = fftw_alloc_real(audio.FFTtreblebufferSize);
audio.in_treble_l = fftw_alloc_real(audio.FFTtreblebufferSize);
audio.in_treble_r_raw = fftw_alloc_real(audio.FFTtreblebufferSize);
audio.in_treble_l_raw = fftw_alloc_real(audio.FFTtreblebufferSize);
out_treble_l = fftw_alloc_complex(audio.FFTtreblebufferSize / 2 + 1);
out_treble_r = fftw_alloc_complex(audio.FFTtreblebufferSize / 2 + 1);
memset(out_treble_l, 0, (audio.FFTtreblebufferSize / 2 + 1) * sizeof(fftw_complex));
memset(out_treble_r, 0, (audio.FFTtreblebufferSize / 2 + 1) * sizeof(fftw_complex));
p_treble_l = fftw_plan_dft_r2c_1d(audio.FFTtreblebufferSize, audio.in_treble_l,
out_treble_l, FFTW_MEASURE);
p_treble_r = fftw_plan_dft_r2c_1d(audio.FFTtreblebufferSize, audio.in_treble_r,
out_treble_r, FFTW_MEASURE);
debug("got buffer size: %d, %d, %d", audio.FFTbassbufferSize, audio.FFTmidbufferSize,
audio.FFTtreblebufferSize);
reset_output_buffers(&audio);
debug("starting audio thread\n");
pthread_t p_thread;
int timeout_counter = 0;
struct timespec timeout_timer = {.tv_sec = 0, .tv_nsec = 1000000};
int thr_id GCC_UNUSED;
switch (p.input) {
#ifdef ALSA
case INPUT_ALSA:
// input_alsa: wait for the input to be ready
if (is_loop_device_for_sure(audio.source)) {
if (directory_exists("/sys/")) {
if (!directory_exists("/sys/module/snd_aloop/")) {
cleanup();
fprintf(stderr,
"Linux kernel module \"snd_aloop\" does not seem to be loaded.\n"
"Maybe run \"sudo modprobe snd_aloop\".\n");
exit(EXIT_FAILURE);
}
}
}
thr_id = pthread_create(&p_thread, NULL, input_alsa,
(void *)&audio); // starting alsamusic listener
timeout_counter = 0;
while (audio.format == -1 || audio.rate == 0) {
nanosleep(&timeout_timer, NULL);
timeout_counter++;
if (timeout_counter > 2000) {
cleanup();
fprintf(stderr, "could not get rate and/or format, problems with audio thread? "
"quiting...\n");
exit(EXIT_FAILURE);
}
}
debug("got format: %d and rate %d\n", audio.format, audio.rate);
break;
#endif
case INPUT_FIFO:
// starting fifomusic listener
thr_id = pthread_create(&p_thread, NULL, input_fifo, (void *)&audio);
audio.rate = p.fifoSample;
audio.format = p.fifoSampleBits;
break;
#ifdef PULSE
case INPUT_PULSE:
if (strcmp(audio.source, "auto") == 0) {
getPulseDefaultSink((void *)&audio);
}
// starting pulsemusic listener
thr_id = pthread_create(&p_thread, NULL, input_pulse, (void *)&audio);
audio.rate = 44100;
break;
#endif
#ifdef SNDIO
case INPUT_SNDIO:
thr_id = pthread_create(&p_thread, NULL, input_sndio, (void *)&audio);
audio.rate = 44100;
break;
#endif
case INPUT_SHMEM:
thr_id = pthread_create(&p_thread, NULL, input_shmem, (void *)&audio);
timeout_counter = 0;
while (audio.rate == 0) {
nanosleep(&timeout_timer, NULL);
timeout_counter++;
if (timeout_counter > 2000) {
cleanup();
fprintf(stderr, "could not get rate and/or format, problems with audio thread? "
"quiting...\n");
exit(EXIT_FAILURE);
}
}
debug("got format: %d and rate %d\n", audio.format, audio.rate);
// audio.rate = 44100;
break;
#ifdef PORTAUDIO
case INPUT_PORTAUDIO:
thr_id = pthread_create(&p_thread, NULL, input_portaudio, (void *)&audio);
audio.rate = 44100;
break;
#endif
default:
exit(EXIT_FAILURE); // Can't happen.
}
if (p.upper_cut_off > audio.rate / 2) {
cleanup();
fprintf(stderr, "higher cuttoff frequency can't be higher than sample rate / 2");
exit(EXIT_FAILURE);
}
int bars[MAX_BARS];
int bars_mem[MAX_BARS];
int bars_last[MAX_BARS];
int previous_frame[MAX_BARS];
int fall[MAX_BARS];
float bars_peak[MAX_BARS];
int height, lines, width, remainder, fp;
#ifdef SDL
// output: start sdl mode
if (output_mode == OUTPUT_SDL) {
init_sdl_window(p.sdl_width, p.sdl_height, p.sdl_x, p.sdl_y);
height = p.sdl_height;
width = p.sdl_width;
}
#endif
bool reloadConf = false;
while (!reloadConf) { // jumping back to this loop means that you resized the screen
for (int n = 0; n < MAX_BARS; n++) {
bars_last[n] = 0;
previous_frame[n] = 0;
fall[n] = 0;
bars_peak[n] = 0;
bars_mem[n] = 0;
bars[n] = 0;
}
// frequencies on x axis require a bar width of four or more
if (p.xaxis == FREQUENCY && p.bar_width < 4)
p.bar_width = 4;
switch (output_mode) {
#ifdef NCURSES
// output: start ncurses mode
case OUTPUT_NCURSES:
init_terminal_ncurses(p.color, p.bcolor, p.col, p.bgcol, p.gradient,
p.gradient_count, p.gradient_colors, &width, &lines);
if (p.xaxis != NONE)
lines--;
// we have 8 times as much height due to using 1/8 block characters
height = lines * 8;
break;
#endif
#ifdef SDL
// output: get sdl window size
case OUTPUT_SDL:
init_sdl_surface(&width, &height, p.color, p.bcolor);
break;
#endif
case OUTPUT_NONCURSES:
get_terminal_dim_noncurses(&width, &lines);
if (p.xaxis != NONE)
lines--;
init_terminal_noncurses(inAtty, p.col, p.bgcol, width, lines, p.bar_width);
height = lines * 8;
break;
case OUTPUT_RAW:
if (strcmp(p.raw_target, "/dev/stdout") != 0) {
int fptest;
// checking if file exists
if (access(p.raw_target, F_OK) != -1) {
// file exists, testopening in case it's a fifo
fptest = open(p.raw_target, O_RDONLY | O_NONBLOCK, 0644);
if (fptest == -1) {
fprintf(stderr, "could not open file %s for writing\n", p.raw_target);
exit(1);
}
} else {
printf("creating fifo %s\n", p.raw_target);
if (mkfifo(p.raw_target, 0664) == -1) {
fprintf(stderr, "could not create fifo %s\n", p.raw_target);
exit(1);
}
// fifo needs to be open for reading in order to write to it
fptest = open(p.raw_target, O_RDONLY | O_NONBLOCK, 0644);
}
fp = open(p.raw_target, O_WRONLY | O_NONBLOCK | O_CREAT, 0644);
} else {
fp = fileno(stdout);
fprintf(stderr, "Opening stdout\n");
}
if (fp == -1) {
fprintf(stderr, "could not open file %s for writing\n", p.raw_target);
exit(1);
}
fprintf(stderr, "open file %s for writing raw output\n", p.raw_target);
// width must be hardcoded for raw output.
width = MAX_BARS;
if (strcmp(p.data_format, "binary") == 0) {
height = pow(2, p.bit_format) - 1;
} else {
height = p.ascii_range;
}
break;
default:
exit(EXIT_FAILURE); // Can't happen.
}
// handle for user setting too many bars
if (p.fixedbars) {
p.autobars = 0;
if (p.fixedbars * p.bar_width + p.fixedbars * p.bar_spacing - p.bar_spacing > width)
p.autobars = 1;
}
// getting numbers of bars
int number_of_bars = p.fixedbars;
if (p.autobars == 1)
number_of_bars = (width + p.bar_spacing) / (p.bar_width + p.bar_spacing);
if (number_of_bars < 1)
number_of_bars = 1; // must have at least 1 bars
if (number_of_bars > MAX_BARS)
number_of_bars = MAX_BARS; // cant have more than MAX_BARS bars
if (p.stereo) { // stereo must have even numbers of bars
if (number_of_bars % 2 != 0)
number_of_bars--;
}
// checks if there is stil extra room, will use this to center
remainder = (width - number_of_bars * p.bar_width - number_of_bars * p.bar_spacing +
p.bar_spacing) /
2;
if (remainder < 0)
remainder = 0;
// process [smoothing]: calculate gravity
float g = p.gravity * ((float)height / 2160) * pow((60 / (float)p.framerate), 2.5);
// calculate integral value, must be reduced with height
double integral = p.integral;
if (height > 320)
integral = p.integral * 1 / sqrt((log10((float)height / 10)));
#ifndef NDEBUG
debug("height: %d width: %d bars:%d bar width: %d remainder: %d\n", height, width,
number_of_bars, p.bar_width, remainder);
#endif
// process: calculate cutoff frequencies and eq
if (p.stereo)
number_of_bars =
number_of_bars / 2; // in stereo only half number of number_of_bars per channel
// for cutoff frequencies and eq calculation
double userEQ_keys_to_bars_ratio;
if (p.userEQ_enabled && (number_of_bars > 0)) {
userEQ_keys_to_bars_ratio =
(double)(((double)p.userEQ_keys) / ((double)number_of_bars));
}
// calculate frequency constant (used to distribute bars across the frequency band)
double frequency_constant = log10((float)p.lower_cut_off / (float)p.upper_cut_off) /
(1 / ((float)number_of_bars + 1) - 1);
float cut_off_frequency[MAX_BARS];
float upper_cut_off_frequency[MAX_BARS];
float relative_cut_off[MAX_BARS];
double center_frequencies[MAX_BARS];
int FFTbuffer_lower_cut_off[MAX_BARS];
int FFTbuffer_upper_cut_off[MAX_BARS];
double eq[MAX_BARS];
int bass_cut_off_bar = -1;
int treble_cut_off_bar = -1;
bool first_bar = true;
int first_treble_bar = 0;
int bar_buffer[number_of_bars + 1];
for (int n = 0; n < number_of_bars + 1; n++) {
double bar_distribution_coefficient = frequency_constant * (-1);
bar_distribution_coefficient +=
((float)n + 1) / ((float)number_of_bars + 1) * frequency_constant;
cut_off_frequency[n] = p.upper_cut_off * pow(10, bar_distribution_coefficient);
if (n > 0) {
if (cut_off_frequency[n - 1] >= cut_off_frequency[n] &&
cut_off_frequency[n - 1] > bass_cut_off)
cut_off_frequency[n] =
cut_off_frequency[n - 1] +
(cut_off_frequency[n - 1] - cut_off_frequency[n - 2]);
}
relative_cut_off[n] = cut_off_frequency[n] / (audio.rate / 2);
// remember nyquist!, per my calculations this should be rate/2
// and nyquist freq in M/2 but testing shows it is not...
// or maybe the nq freq is in M/4
eq[n] = pow(cut_off_frequency[n], 1);
// the numbers that come out of the FFT are verry high
// the EQ is used to "normalize" them by dividing with this verry huge number
eq[n] *= (float)height / pow(2, 28);
if (p.userEQ_enabled)
eq[n] *= p.userEQ[(int)floor(((double)n) * userEQ_keys_to_bars_ratio)];
eq[n] /= log2(audio.FFTbassbufferSize);
if (cut_off_frequency[n] < bass_cut_off) {
// BASS
bar_buffer[n] = 1;
FFTbuffer_lower_cut_off[n] =
relative_cut_off[n] * (audio.FFTbassbufferSize / 2);
bass_cut_off_bar++;
treble_cut_off_bar++;
if (bass_cut_off_bar > 0)
first_bar = false;
eq[n] *= log2(audio.FFTbassbufferSize);
} else if (cut_off_frequency[n] > bass_cut_off &&
cut_off_frequency[n] < treble_cut_off) {
// MID
bar_buffer[n] = 2;
FFTbuffer_lower_cut_off[n] = relative_cut_off[n] * (audio.FFTmidbufferSize / 2);
treble_cut_off_bar++;
if ((treble_cut_off_bar - bass_cut_off_bar) == 1) {
first_bar = true;
FFTbuffer_upper_cut_off[n - 1] =
relative_cut_off[n] * (audio.FFTbassbufferSize / 2);
} else {
first_bar = false;
}
eq[n] *= log2(audio.FFTmidbufferSize);
} else {
// TREBLE
bar_buffer[n] = 3;
FFTbuffer_lower_cut_off[n] =
relative_cut_off[n] * (audio.FFTtreblebufferSize / 2);
first_treble_bar++;
if (first_treble_bar == 1) {
first_bar = true;
FFTbuffer_upper_cut_off[n - 1] =
relative_cut_off[n] * (audio.FFTmidbufferSize / 2);
} else {
first_bar = false;
}
eq[n] *= log2(audio.FFTtreblebufferSize);
}
if (n > 0) {
if (!first_bar) {
FFTbuffer_upper_cut_off[n - 1] = FFTbuffer_lower_cut_off[n] - 1;
// pushing the spectrum up if the exponential function gets "clumped" in the
// bass and caluclating new cut off frequencies
if (FFTbuffer_lower_cut_off[n] <= FFTbuffer_lower_cut_off[n - 1]) {
FFTbuffer_lower_cut_off[n] = FFTbuffer_lower_cut_off[n - 1] + 1;
FFTbuffer_upper_cut_off[n - 1] = FFTbuffer_lower_cut_off[n] - 1;
if (bar_buffer[n] == 1)
relative_cut_off[n] = (float)(FFTbuffer_lower_cut_off[n]) /
((float)audio.FFTbassbufferSize / 2);
else if (bar_buffer[n] == 2)
relative_cut_off[n] = (float)(FFTbuffer_lower_cut_off[n]) /
((float)audio.FFTmidbufferSize / 2);
else if (bar_buffer[n] == 3)
relative_cut_off[n] = (float)(FFTbuffer_lower_cut_off[n]) /
((float)audio.FFTtreblebufferSize / 2);
cut_off_frequency[n] = relative_cut_off[n] * ((float)audio.rate / 2);
}
} else {
if (FFTbuffer_upper_cut_off[n - 1] <= FFTbuffer_lower_cut_off[n - 1])
FFTbuffer_upper_cut_off[n - 1] = FFTbuffer_lower_cut_off[n - 1] + 1;
}
upper_cut_off_frequency[n - 1] =
cut_off_frequency[n]; // high_relative_cut_off * ((float)audio.rate / 2);
center_frequencies[n - 1] =
pow((cut_off_frequency[n - 1] * upper_cut_off_frequency[n - 1]), 0.5);
}
#ifndef NDEBUG
initscr();
curs_set(0);
timeout(0);
if (n != 0) {
mvprintw(n, 0, "%d: %f -> %f (%d -> %d) bass: %d, treble:%d \n", n,
cut_off_frequency[n - 1], cut_off_frequency[n],
FFTbuffer_lower_cut_off[n - 1], FFTbuffer_upper_cut_off[n - 1],
bass_cut_off_bar, treble_cut_off_bar);
}
#endif
}
if (p.stereo)
number_of_bars = number_of_bars * 2;
// process: calculate x axis values
int x_axis_info = 0;
if (p.xaxis != NONE) {
x_axis_info = 1;
double center_frequency;
if (output_mode == OUTPUT_NONCURSES) {
printf("\r\033[%dB", lines + 1);
if (remainder)
printf("\033[%dC", remainder);
}
for (int n = 0; n < number_of_bars; n++) {
if (p.stereo) {
if (n < number_of_bars / 2)
center_frequency = center_frequencies[number_of_bars / 2 - 1 - n];
else
center_frequency = center_frequencies[n - number_of_bars / 2];
} else {
center_frequency = center_frequencies[n];
}
float freq_kilohz = center_frequency / 1000;
int freq_floor = center_frequency;
if (output_mode == OUTPUT_NCURSES) {
#ifdef NCURSES
if (center_frequency < 1000)
mvprintw(lines, n * (p.bar_width + p.bar_spacing) + remainder, "%-4d",
freq_floor);
else if (center_frequency > 1000 && center_frequency < 10000)
mvprintw(lines, n * (p.bar_width + p.bar_spacing) + remainder, "%.2f",
freq_kilohz);
else
mvprintw(lines, n * (p.bar_width + p.bar_spacing) + remainder, "%.1f",
freq_kilohz);
#endif
} else if (output_mode == OUTPUT_NONCURSES) {
if (center_frequency < 1000)
printf("%-4d", freq_floor);
else if (center_frequency > 1000 && center_frequency < 10000)
printf("%.2f", freq_kilohz);
else
printf("%.1f", freq_kilohz);
if (n < number_of_bars - 1)
printf("\033[%dC", p.bar_width + p.bar_spacing - 4);
}
}
printf("\r\033[%dA", lines + 1);
}
bool resizeTerminal = false;
int frame_time_msec = (1 / (float)p.framerate) * 1000;
struct timespec framerate_timer = {.tv_sec = 0, .tv_nsec = 0};
if (p.framerate <= 1) {
framerate_timer.tv_sec = frame_time_msec * 1000;
} else {
framerate_timer.tv_sec = 0;
framerate_timer.tv_nsec = frame_time_msec * 1e6;
}
int sleep_counter = 0;
bool silence = false;
char ch = '\0';
#ifndef NDEBUG
int maxvalue = 0;
int minvalue = 0;
#endif
struct timespec sleep_mode_timer = {.tv_sec = 1, .tv_nsec = 0};
while (!resizeTerminal) {
// general: keyboard controls
#ifdef NCURSES
if (output_mode == OUTPUT_NCURSES)
ch = getch();
#endif
/*
// disabled key controls in non-curses mode, caused garbage on screen
if (output_mode == OUTPUT_NONCURSES)
ch = fgetc(stdin);
*/
switch (ch) {
case 65: // key up
p.sens = p.sens * 1.05;
break;
case 66: // key down
p.sens = p.sens * 0.95;
break;
case 68: // key right
p.bar_width++;
resizeTerminal = true;
break;
case 67: // key left
if (p.bar_width > 1)
p.bar_width--;
resizeTerminal = true;
break;
case 'r': // reload config
should_reload = 1;
break;
case 'c': // reload colors
reload_colors = 1;
break;
case 'f': // change forground color
if (p.col < 7)
p.col++;
else
p.col = 0;
resizeTerminal = true;
break;
case 'b': // change backround color
if (p.bgcol < 7)
p.bgcol++;
else
p.bgcol = 0;
resizeTerminal = true;
break;
case 'q':
should_reload = 1;
should_quit = 1;
}
if (should_reload) {
reloadConf = true;
resizeTerminal = true;
should_reload = 0;
}
if (reload_colors) {
struct error_s error;
error.length = 0;
if (!load_config(configPath, (void *)&p, 1, &error)) {
cleanup();
fprintf(stderr, "Error loading config. %s", error.message);
exit(EXIT_FAILURE);
}
resizeTerminal = true;
reload_colors = 0;
}
#ifndef NDEBUG
// clear();
refresh();
#endif
// process: check if input is present
silence = true;
for (int n = 0; n < audio.FFTbassbufferSize; n++) {
if (audio.in_bass_l[n] || audio.in_bass_r[n]) {
silence = false;
break;
}
}
if (output_mode != OUTPUT_SDL) {
if (p.sleep_timer) {
if (silence && sleep_counter <= p.framerate * p.sleep_timer)
sleep_counter++;
else if (!silence)
sleep_counter = 0;
if (sleep_counter > p.framerate * p.sleep_timer) {
#ifndef NDEBUG
printw("no sound detected for 30 sec, going to sleep mode\n");
#endif
nanosleep(&sleep_mode_timer, NULL);
continue;
}
}
}
// process: execute FFT and sort frequency bands
pthread_mutex_lock(&lock);
fftw_execute(p_bass_l);
fftw_execute(p_mid_l);
fftw_execute(p_treble_l);
if (p.stereo) {
fftw_execute(p_bass_r);
fftw_execute(p_mid_r);