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audio.c
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audio.c
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#include "audio.h"
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
static int keep_playing = 1;
pthread_t audioThread;
static BOOL memReader_Eof(MREADER* reader) {
MemReader* mr = (MemReader*) reader;
if (!mr) return 1;
if (mr->pos >= mr->len) return 1;
return 0;
}
static BOOL memReader_Read(MREADER* reader,void* ptr,size_t size) {
unsigned char *d;
const unsigned char *s;
MemReader* mr;
long siz;
BOOL ret;
if (!reader || !size || (size > (size_t) LONG_MAX))
return 0;
mr = (MemReader*) reader;
siz = (long) size;
if (mr->pos >= mr->len) return 0; /* @ eof */
if (mr->pos + siz > mr->len) {
siz = mr->len - mr->pos;
ret = 0; /* not enough remaining bytes */
}
else {
ret = 1;
}
s = (const unsigned char *) mr->buffer;
s += mr->pos;
mr->pos += siz;
d = (unsigned char *) ptr;
while (siz) {
*d++ = *s++;
siz--;
}
return ret;
}
static int memReader_Get(MREADER* reader) {
MemReader* mr;
int c;
mr = (MemReader*) reader;
if (mr->pos >= mr->len) return EOF;
c = ((const unsigned char*) mr->buffer)[mr->pos];
mr->pos++;
return c;
}
static int memReader_Seek(MREADER* reader,long offset,int whence) {
MemReader* mr;
if (!reader) return -1;
mr = (MemReader*) reader;
switch(whence)
{
case SEEK_CUR:
mr->pos += offset;
break;
case SEEK_SET:
mr->pos = reader->iobase + offset;
break;
case SEEK_END:
mr->pos = mr->len + offset;
break;
default: /* invalid */
return -1;
}
if (mr->pos < reader->iobase) {
mr->pos = mr->core.iobase;
return -1;
}
if (mr->pos > mr->len) {
mr->pos = mr->len;
}
return 0;
}
static long memReader_Tell(MREADER* reader) {
if (reader) {
return ((MemReader*)reader)->pos - reader->iobase;
}
return 0;
}
MREADER *createMemReader(const void *buffer, long len) {
MemReader* reader = (MemReader*)calloc(1, sizeof(MemReader));
if (reader) {
reader->core.Eof = &memReader_Eof;
reader->core.Read= &memReader_Read;
reader->core.Get = &memReader_Get;
reader->core.Seek= &memReader_Seek;
reader->core.Tell= &memReader_Tell;
reader->buffer = buffer;
reader->len = len;
reader->pos = 0;
}
return (MREADER*)reader;
}
static void* audioThreadRoutine(void *arg) {
const char* module_path = (const char*)arg;
size_t data_len;
void *data_buf;
int ret = loadRessource(module_path, &data_buf, &data_len);
if (ret < 0) {
free(data_buf);
exit(EXIT_FAILURE);
}
MREADER *mem_reader = createMemReader(data_buf, data_len);
MODULE *module = Player_LoadGeneric(mem_reader, 64, 0);
if (module) {
Player_Start(module);
pthread_mutex_lock(&mutex);
while (Player_Active() && keep_playing) {
pthread_mutex_unlock(&mutex);
MikMod_Update();
usleep(10000);
pthread_mutex_lock(&mutex);
}
pthread_mutex_unlock(&mutex);
Player_Stop();
Player_Free(module);
}
else {
fprintf(stderr, "Could not load module, reason: %s\n", MikMod_strerror(MikMod_errno));
}
return NULL;
}
void initAudio() {
MikMod_RegisterAllDrivers();
MikMod_RegisterAllLoaders();
md_mode |= DMODE_SOFT_MUSIC;
if (MikMod_Init("")) {
fprintf(stderr, "Could not initialize sound, reason: %s\n", MikMod_strerror(MikMod_errno));
exit(EXIT_FAILURE);
}
}
void playMod(const char *filename) {
if (pthread_create(&audioThread, NULL, audioThreadRoutine, (void*)filename) != 0) {
fprintf(stderr, "Failed to create thread\n");
exit(EXIT_FAILURE);
}
}
void stopSound() {
pthread_mutex_lock(&mutex);
keep_playing = 0;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&mutex);
}
void cleanupAudio() {
pthread_join(audioThread, NULL);
MikMod_Exit();
}