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ampler
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compare: bx:6b3c8210b5cbad1be7c315f25d53e51bfee80e1e
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2 Commits
4039d4edf8 ... 6b3c8210b5

Author SHA1 Message Date
bx 6b3c8210b5 visualiser now runns on defaut input device 2021-12-27 06:23:29 +00:00
bx 6f01e60b10 it compiles on linux with gcc now 2021-12-27 05:29:16 +00:00
9 changed files with 122 additions and 26 deletions
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2
.gitignore vendored
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@ -3,3 +3,5 @@
*.dll
reload-trigger
*.wav
*.so
core

28
ampler.c
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@ -6,10 +6,10 @@
#include "draw.c"
Ampler_state *init() {
Ampler_state *state = malloc(sizeof Ampler_state);
SDL_memset(state, 0, sizeof Ampler_state);
Ampler_state *state = malloc(sizeof (Ampler_state));
SDL_memset(state, 0, sizeof (Ampler_state));
state -> size = sizeof Ampler_state;
state -> size = sizeof (Ampler_state);
SDL_AudioSpec want = { 0 }, have = { 0 };
want.freq = SAMPLE_RATE;
@ -29,11 +29,21 @@ Ampler_state *init() {
if !(state -> playdev) do
puts(SDL_GetError());
state -> recdev = SDL_OpenAudioDevice(
NULL, // default device
1, // is capture
&want,
&have,
0 // no changes allowed
);
if !(state -> playdev) do
puts(SDL_GetError());
// TODO: iterate a directory to load samples
//load_sample(state, "mix.wav");
//load_sample(state, "loop2.wav");
//load_sample(state, "loop.wav");
//load_sample(state, "chord.wav");
//load_sample(state, "./mix.wav");
//load_sample(state, "./loop2.wav");
//load_sample(state, "./loop.wav");
//load_sample(state, "./chord.wav");
puts("init.");
return state;
@ -42,7 +52,7 @@ Ampler_state *init() {
int ampler_main(SDL_Window *w, SDL_Renderer *r, Ampler_state **u_data) {
if *u_data == NULL do *u_data = init();
u32 old_size = (*u_data) -> size, new_size = sizeof Ampler_state;
u32 old_size = (*u_data) -> size, new_size = sizeof(Ampler_state);
if old_size < new_size do {
printf("increasing size. %i to %i\n", old_size, new_size);
Ampler_state *nu = malloc(new_size);
@ -60,6 +70,7 @@ int ampler_main(SDL_Window *w, SDL_Renderer *r, Ampler_state **u_data) {
// put results in state for last frame's perf, so that we can draw it
SDL_SetWindowTitle(w, "ampler");
SDL_PauseAudioDevice(state -> playdev, 0); // unpause audio
SDL_PauseAudioDevice(state -> recdev, 0); // unpause audio
udp_init(state);
while 1 do {
SDL_Event e;
@ -80,6 +91,7 @@ int ampler_main(SDL_Window *w, SDL_Renderer *r, Ampler_state **u_data) {
if !remove("reload-trigger") do {
SDL_PauseAudioDevice(state -> playdev, 1); // pause audio
SDL_PauseAudioDevice(state -> recdev, 1); // pause audio
udp_quit(state);
puts("removed reload-trigger, reloading...");
return 0;

2
ampler.h
View File

@ -63,10 +63,12 @@ typedef struct Ampler_state Ampler_state;
struct Ampler_state {
u32 size; // in bytes, off this struct
SDL_AudioDeviceID playdev;
SDL_AudioDeviceID recdev;
Sound_src sounds[64];
s32 played_audio_last_frame;
Udp_msg messages[64];
s8 frame_mix[CHANNELS][FRAME_SAMPLES];
s8 frame_rec[CHANNELS][FRAME_SAMPLES];
};

38
audio.c
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@ -60,9 +60,33 @@ void sound_src_frame(Sound_src *s, s8 *mix[]) {
}
}
void rec_frame(Ampler_state *state) {
// const int frame_bytes = FRAME_SAMPLES * CHANNELS * sizeof(s16);
static s16 buf[FRAME_SAMPLES * CHANNELS * sizeof(s16)];
u32 samps = SDL_GetQueuedAudioSize(state->recdev) / sizeof(s16);
// TODO: this introduces a frame of lag, but should make sure we always
// deque a full frame, maybe find a less laggy way ?
if samps > FRAME_SAMPLES * CHANNELS * 2 do {
u32 bytes = SDL_DequeueAudio(state->recdev, buf, sizeof(buf));
// printf("%i %i %i samples\n", samps, bytes / sizeof(s16), sizeof(buf) / 2);
}
// TODO: test with stero recording input to make sure this works
for int i = 0; i < FRAME_SAMPLES; i += 1 do
for int c = 0; c < CHANNELS; c += 1 do {
state->frame_rec[c][i] = buf[i * CHANNELS + c] >> 8;
}
}
int audio_frame(Ampler_state *state) {
// TODO: it's unlikely but possible that we can miss recorded data because
// gur rec buffer was filled on a frame where we didn't play anything
rec_frame(state);
int queued = SDL_GetQueuedAudioSize(state -> playdev);
queued /= sizeof s16; // queued is in bytes
queued /= sizeof (s16); // queued is in bytes
if queued > FRAME_SAMPLES * CHANNELS * 2 do return 0;
// else puts("queued audio.");
@ -72,8 +96,8 @@ int audio_frame(Ampler_state *state) {
// TODO: We should use CHANNELS here
// static s8 mix_l[FRAME_SAMPLES] = { 0 }, mix_r[FRAME_SAMPLES] = { 0 };
s8 *mix_l = state->frame_mix[0], *mix_r = state->frame_mix[1];
SDL_memset(mix_l, 0, FRAME_SAMPLES / sizeof s8);
SDL_memset(mix_r, 0, FRAME_SAMPLES / sizeof s8);
SDL_memset(mix_l, 0, FRAME_SAMPLES / sizeof (s8));
SDL_memset(mix_r, 0, FRAME_SAMPLES / sizeof (s8));
s8 *mix[] = { mix_l, mix_r };
foreach_ptr(Sound_src, snd, state -> sounds)
@ -85,7 +109,7 @@ int audio_frame(Ampler_state *state) {
for int t = 0; t < CHANNELS; t += 1 do
frame[i * CHANNELS + t] = ((s16) (mix[t][i])) * vol;
if SDL_QueueAudio(state -> playdev, frame, sizeof frame) do
if SDL_QueueAudio(state -> playdev, frame, sizeof (frame)) do
puts(SDL_GetError());
return 1; // audio was qued
@ -107,7 +131,7 @@ void load_sample(Ampler_state *state, const char *file_name) {
s16 *buffer = NULL;
u32 bytes = 0;
SDL_LoadWAV(file_name, &spec, &buffer, &bytes);
SDL_LoadWAV(file_name, &spec, (u8 **) &buffer, &bytes);
if spec.format != AUDIO_S16 do {
puts("error: sample.wav is not s16");
@ -115,7 +139,7 @@ void load_sample(Ampler_state *state, const char *file_name) {
}
const int chans = spec.channels;
const int length = (bytes / sizeof s16) / chans;
const int length = (bytes / sizeof (s16)) / chans;
snd -> track_len = length;
snd -> speed = 1.0f;
@ -124,7 +148,7 @@ void load_sample(Ampler_state *state, const char *file_name) {
snd -> end = snd->track_len;
snd -> state = SND_STOPPED;
snd -> note_speed = 1.0f; // TODO: Look up a note ?
SDL_memset(snd->name, 0, sizeof snd->name);
SDL_memset(snd->name, 0, sizeof (snd->name));
for int i = 0; i < arraylen(snd->name) - 1; i += 1 do
if file_name[i] == '\0' or file_name[i] == '.' do break;
else snd->name[i] = file_name[i];

2
compile-ampler.sh 100755
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@ -0,0 +1,2 @@
#!/bin/bash
gcc ampler.c udp.c -o ampler.so -shared -lSDL2 -g --std c99 && echo > reload-trigger

2
compile-core.sh 100755
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@ -0,0 +1,2 @@
#!/bin/bash
gcc core.c -o core -lSDL2 -g

33
core.c
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@ -6,11 +6,30 @@
#define SDL_MAIN_HANDLED
#include <SDL2/SDL.h>
#define SHARED_OBJECT "ampler.dll"
#ifdef __WIN32__
# define SHARED_OBJECT "ampler.dll"
# define SHARED_OBJECT_ACTIVE SHARED_OBJECT "-active.dll"
#else
# define SHARED_OBJECT "./ampler.so"
# define SHARED_OBJECT_ACTIVE SHARED_OBJECT
#endif
#define SHARED_MAIN "ampler_main"
#define SHARED_OBJECT_ACTIVE SHARED_OBJECT "-active.dll"
#ifdef __WIN32__
int copy_shared_object() {
if (system("copy " SHARED_OBJECT " " SHARED_OBJECT_ACTIVE " /Y")) {
puts("failed copying to " SHARED_OBJECT_ACTIVE);
// puts(SDL_GetError());
return 1;
}
return 0;
}
#else
int copy_shared_object() {
return 0;
}
#endif
int main(int argc, char **argv) {
puts("start.");
@ -25,16 +44,10 @@ int main(int argc, char **argv) {
r = SDL_CreateRenderer(w, -1,
SDL_RENDERER_ACCELERATED | SDL_RENDERER_TARGETTEXTURE);
//SDL_CreateWindowAndRenderer(
// 1080, 480, SDL_WINDOW_RESIZABLE, &w, &r);
void *u_data = NULL;
while (1) {
if (system("copy " SHARED_OBJECT " " SHARED_OBJECT_ACTIVE " /Y")) {
puts("failed copying to " SHARED_OBJECT_ACTIVE);
// puts(SDL_GetError());
if (copy_shared_object())
break;
}
void *so = SDL_LoadObject(SHARED_OBJECT_ACTIVE);
if (so == 0) {

6
draw.c
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@ -13,7 +13,7 @@ void draw_frame(SDL_Window *w, SDL_Renderer *r, Ampler_state *state) {
// TODO: DRAW WITH X SCALE FACTOR
// TODO: DRAW SMOLER
SDL_SetRenderDrawColor(r, 0xFF, 0x00, 0x4D, 255);
const space = (44100 * 8) / 512;
const int space = (44100 * 8) / 512;
const int t = 0; // TODO: DRAW L / R OVERLAPPED IN DIFF COLORS ?
const int wav_h = 128;
if 0 do
@ -40,6 +40,10 @@ void draw_frame(SDL_Window *w, SDL_Renderer *r, Ampler_state *state) {
for int x = 0; x < FRAME_SAMPLES - 1; x += 1 do {
u8 cur = state->frame_mix[0][x] + 128;
u8 next = state->frame_mix[0][x + 1] + 128;
cur = state->frame_rec[0][x] + 128;
next = state->frame_rec[0][x + 1] + 128;
markov[cur][next] += 1;
}

35
udp.c
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@ -8,7 +8,14 @@
* store from ip + port in message ?
*/
#ifdef __WIN32__
#include <winsock2.h>
#else
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/time.h>
#include <unistd.h>
#endif
#include "ampler.h"
@ -19,8 +26,13 @@
#undef while
// G l o b a L E v i L //
#ifdef __WIN32__
static SOCKET udp_sock;
#else
static int udp_sock;
#endif
#ifdef __WIN32__
void udp_init(Ampler_state *state) {
// https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsastartup
WSADATA wsa;
@ -53,12 +65,24 @@ void udp_init(Ampler_state *state) {
if (bind_result == SOCKET_ERROR)
printf("error: bind returned SOCKET_ERROR, WSAGetLastError() = %i\n" , WSAGetLastError());
}
#else
void udp_init(Ampler_state *state) {
//
}
#endif
#ifdef __WIN32__
void udp_quit(Ampler_state *state) {
closesocket(udp_sock);
WSACleanup();
}
#else
void udp_quit(Ampler_state *state) {
// close(udp_sock);
}
#endif
#ifdef __WIN32__
void recv_packet(Ampler_state *state) {
char discard_buf[32] = { 0 }; // for dropped packets
char *buf = discard_buf;
@ -98,7 +122,13 @@ void recv_packet(Ampler_state *state) {
if (0) // FOR DEBUGGING
printf("%s:%d\t%s\n", from_ip_str, from_port, buf);
}
#else
void recv_packet(Ampler_state *state) {
//
}
#endif
#ifdef __WIN32__
void udp_frame(Ampler_state *state) {
// https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-select
fd_set recv_fd_set;
@ -133,6 +163,11 @@ void udp_frame(Ampler_state *state) {
recv_packet(state);
}
}
#else
void udp_frame(Ampler_state *state) {
//
}
#endif