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#define SDL_MAIN_HANDLED
#include <portaudio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include "include.h"
int module_openmpt(struct blob *file, struct userdata *userdata);
int module_fluidsynth(struct blob *file, struct userdata *userdata);
#define eprintf(...) fprintf(stderr, __VA_ARGS__)
static const int WINDOW_WIDTH = 160, WINDOW_HEIGHT = 90;
volatile sig_atomic_t keep_going = 1;
void sigint_handler(int sig_num) {
signal(SIGINT, SIG_IGN);
keep_going = 0;
}
struct blob load_file(char const *const name);
struct userdata userdata = {
.callback = NULL,
.user = NULL,
};
//void audio_callback(void *userdata_void, unsigned char *stream_void, int const length) {
int audio_callback(void const *inBuf, void *outBuf, unsigned long const frameCount, PaStreamCallbackTimeInfo const* timeInfo, PaStreamCallbackFlags statusFlags, void *userdata_void) {
(void) inBuf;
(void) timeInfo;
(void) statusFlags;
struct userdata *user = userdata_void;
user->callback(user->user, outBuf, frameCount * sizeof (float) * 2);
return 0;
}
int (*file_ext(char *file))(struct blob *, struct userdata *);
int main(int argc, char **argv) {
if (argc != 2) {
eprintf("usage: %s audio-file.{mid,mod,xm,it,s3m}\n", argv[0]);
return EXIT_FAILURE;
} else {
int (*module_func)(struct blob *, struct userdata *) = file_ext(argv[1]);
if (module_func == NULL) {
eprintf("%s: unrecognized file extension\n", argv[1]);
return EXIT_FAILURE;
}
struct blob file = load_file(argv[1]);
if (file.data == NULL) {
perror(argv[1]);
return EXIT_FAILURE;
}
module_func(&file, &userdata);
}
signal(SIGINT, sigint_handler); // signal(3) claims this method is deprecated, but..
PaError paErr;
if ((paErr = Pa_Initialize()) != paNoError) {
printf("error: Pa_Initialize: %s\n", Pa_GetErrorText(paErr));
goto error;
}
PaStream *stream;
if ((paErr = Pa_OpenDefaultStream(
&stream,
IN_CHANNELS,
OUT_CHANNELS,
paFloat32,
SAMPLE_RATE,
paFramesPerBufferUnspecified,
audio_callback,
&userdata
)) != paNoError) {
printf("error: Pa_OpenDefaultStream: %s\n", Pa_GetErrorText(paErr));
goto error;
}
if ((paErr = Pa_StartStream(stream)) != paNoError) {
printf("error: Pa_StartStream: %s\n", Pa_GetErrorText(paErr));
goto error;
}
while (keep_going) {
Pa_Sleep(1000);
}
if ((paErr = Pa_StopStream(stream)) != paNoError) {
printf("error: Pa_StopStream: %s\n", Pa_GetErrorText(paErr));
goto error;
}
if ((paErr = Pa_CloseStream(stream)) != paNoError) {
printf("error: Pa_CloseStream: %s\n", Pa_GetErrorText(paErr));
goto error;
}
if ((paErr = Pa_Terminate()) != paNoError) {
printf("error: Pa_Terminate: %s\n", Pa_GetErrorText(paErr));
goto error;
}
return EXIT_SUCCESS;
error:
return EXIT_FAILURE;
}
int (*file_ext(char *file))(struct blob *, struct userdata *) {
size_t len = strlen(file);
#define ext(extension) memcmp(file + len - sizeof (extension) + 1, extension, sizeof (extension))
if ((ext(".mptm") && ext(".mod") && ext(".xm") && ext(".s3m") && ext(".it")) == 0) {
return module_openmpt;
} else if ((ext(".mid") && ext(".midi")) == 0) {
return module_fluidsynth;
}
#undef ext
return NULL;
}
struct blob load_file(char const *const name) {
const size_t START_SIZE = 1;
FILE *file = fopen(name, "rb");
if (file == NULL) {
return (struct blob) {.data = NULL};
}
void *data = malloc(START_SIZE);
size_t allocated = START_SIZE;
size_t used = 0;
while (1) {
size_t read = fread(data + used, 1, allocated - used, file);
if (read != allocated - used) {
used += read;
break;
}
used += read;
allocated *= 2;
void *const newdata = realloc(data, allocated);
if (newdata == NULL) {
goto realloc_error;
}
data = newdata;
}
void *const newdata = realloc(data, used);
if (newdata == NULL && used != 0) {
goto realloc_error;
}
fclose(file);
return (struct blob) {.data = newdata, .size = used};
realloc_error:
free(data);
fclose(file);
return (struct blob) {.data = NULL};
}
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