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Update experiment with tty audio

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This commit is contained in:
Justine Tunney 2022-07-15 23:07:32 -07:00
parent aa34340f3d
commit 6c724c0f1a
7 changed files with 286 additions and 30 deletions
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95
examples/ttyaudio.c
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@ -8,16 +8,41 @@
╚─────────────────────────────────────────────────────────────────*/
#endif
#include "dsp/core/core.h"
#include "libc/bits/bits.h"
#include "libc/calls/calls.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/fmt/nf32.h"
#include "libc/log/check.h"
#include "libc/macros.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/append.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/itimer.h"
#include "libc/sysv/consts/sig.h"
#include "libc/time/time.h"
/**
* @fileoverview experimental way to play audio in terminals
*
* This is an stdio application that prints audio samples. The terminal
* on the other end, needs to be able to understand the Nf sequences we
* use here, which should be invisible to the terminal sort of like out
* of band signalling.
*
* To play audio with a supporting terminal:
*
* make -j8 o//examples/ttyaudio.com
* wget https://justine.lol/numbers.s16
* o//examples/ttyaudio.com numbers.s16
*
* To reveal the inband ansi audio transmission:
*
* o//examples/ttyaudio.com numbers.s16 2>/dev/null |
* o//tool/viz/bing.com |
* o//tool/viz/fold.com
*
*/
#define CSI "s"
#define SGR1 "?80"
#define SGR2 "?81"
@ -31,6 +56,7 @@ struct Ring {
struct Speaker {
int rate; // in hertz, e.g. 8000
int codec; // 0 = s16, 2 = µ-Law
int channels; // 1 = mono, 2 = stereo
struct Ring buf; // audio playback buffer
};
@ -40,10 +66,13 @@ const int ptime = 20;
struct Speaker s;
void OnAlrm(int sig) {
}
void LoadAudioFile(struct Speaker* s, const char* path) {
int rc;
FILE* f;
short buf[256];
short buf[1024];
if (!(f = fopen(path, "rb"))) {
fprintf(stderr, "failed to open file\n");
exit(1);
@ -64,36 +93,26 @@ void LoadAudioFile(struct Speaker* s, const char* path) {
fclose(f);
}
void OnAlrm(int sig) {
int i, j;
int count;
int samps = s.rate / (1000 / ptime);
for (i = 0; i < samps; i += count) {
printf("\e[" SGR2);
count = MIN(samps - i, maxar);
for (j = 0; j < count; ++j) {
printf(";%d", s.buf.p[s.buf.i++] & 0xffff);
/* printf(";%d", mulaw(s.buf.p[s.buf.i++])); */
if (s.buf.i == s.buf.n) break;
}
printf(CSI);
if (s.buf.i == s.buf.n) break;
}
fflush(stdout);
if (s.buf.i == s.buf.n) exit(0);
fprintf(stderr, "\r\e[K%d / %d", s.buf.i, s.buf.n);
fflush(stderr);
}
int main(int argc, char* argv[]) {
if (!isatty(1)) exit(1);
if (argc < 2) return 1;
if (!isatty(0)) exit(1);
s.rate = 8000;
s.channels = 1;
LoadAudioFile(&s, "/home/jart/Music/numbers.s16");
s.codec = 0;
LoadAudioFile(&s, argv[1]);
printf("\e[" SGR1 "%d;%d;0" CSI, s.rate, s.channels);
fflush(stdout);
char nf[21];
char* obuf = 0;
appendw(&obuf, READ16LE("\e%"));
appendd(&obuf, nf, EncodeNf32(nf, s.rate) - nf);
appendw(&obuf, '/');
appendd(&obuf, nf, EncodeNf32(nf, s.channels) - nf);
appendw(&obuf, '/');
appendd(&obuf, nf, EncodeNf32(nf, s.codec) - nf);
appendw(&obuf, '0');
write(1, obuf, appendz(obuf).i);
free(obuf);
struct sigaction sa = {.sa_handler = OnAlrm};
struct itimerval it = {{0, ptime * 1000}, {0, ptime * 1000}};
@ -101,8 +120,30 @@ int main(int argc, char* argv[]) {
CHECK_NE(-1, setitimer(ITIMER_REAL, &it, 0));
for (;;) {
char* p;
int count;
char nf[22];
int i, j, x;
char* obuf = 0;
int samps = s.rate / (1000 / ptime);
appendw(&obuf, READ16LE("\e "));
for (i = 0; i < samps; ++i) {
if (s.codec == 1) {
x = mulaw(s.buf.p[s.buf.i++]);
} else {
x = s.buf.p[s.buf.i++] & 0xffff;
}
*(p = EncodeNf32(nf, x)) = '/';
appendd(&obuf, nf, p + 1 - nf);
if (s.buf.i == s.buf.n) break;
}
appendw(&obuf, '0');
write(1, obuf, appendz(obuf).i);
free(obuf);
fprintf(stderr, "\r\e[K%d / %d", s.buf.i, s.buf.n);
fflush(stderr);
pause();
}
return 0;
return 1;
}