ayemu_vtx_t * ayemu_vtx_load_from_file(const char *filename)
{
size_t size;
#ifdef __MINGW32__
SYSTEM_INFO si;
GetSystemInfo(&si);
const size_t page_size = (size_t) si.dwPageSize;
#else
const size_t page_size = (size_t) sysconf (_SC_PAGESIZE);
#endif
int fd;
struct stat st;
ayemu_vtx_t *ret;
// printf("Page size is %d\n", page_size);
if (stat(filename, &st) != 0) {
fprintf(stderr, "Can't stat file %s: %s\n", filename, strerror(errno));
return NULL;
}
size = st.st_size;
fd = open(filename, O_RDONLY, 0);
if (fd == 0) {
fprintf(stderr, "Can't open file %s: %s\n", filename, strerror(errno));
return NULL;
}
size_t data_len = (size / page_size + 1) * page_size;
char *data = mmap(NULL, data_len, PROT_READ, MAP_PRIVATE, fd, 0);
if (data == (void*)(-1)) {
fprintf(stderr, "Can't mmap file %s: %s\n", filename, strerror(errno));
return NULL;
}
ret = ayemu_vtx_load(data, size);
if (munmap(data, data_len) != 0) {
fprintf(stderr, "Can't munmmap file %s: %s\n", filename, strerror(errno));
}
return ret;
}
static int
vtx_init (DB_fileinfo_t *_info, DB_playItem_t *it) {
// prepare to decode the track
// return -1 on failure
vtx_info_t *info = (vtx_info_t *)_info;
size_t sz = 0;
char *buf = NULL;
deadbeef->pl_lock ();
DB_FILE *fp = deadbeef->fopen (deadbeef->pl_find_meta (it, ":URI"));
deadbeef->pl_unlock ();
if (!fp) {
trace ("vtx: failed to open file %s\n", deadbeef->pl_find_meta (it, ":URI"));
return -1;
}
sz = deadbeef->fgetlength (fp);
if (sz <= 0) {
trace ("vtx: bad file size\n");
return -1;
}
buf = malloc (sz);
if (!buf) {
trace ("vtx: out of memory\n");
return -1;
}
if (deadbeef->fread (buf, 1, sz, fp) != sz) {
trace ("vtx: read failed\n");
free (buf);
return -1;
}
info->decoder = ayemu_vtx_load (buf, sz);
if (!info->decoder) {
trace ("vtx: ayemu_vtx_load failed\n");
free (buf);
return -1;
}
trace ("vtx: data=%p, size=%d\n", info->decoder->regdata, info->decoder->regdata_size);
free (buf);
ayemu_init (&info->ay);
ayemu_set_chip_type (&info->ay, info->decoder->chiptype, NULL);
ayemu_set_chip_freq (&info->ay, info->decoder->chipFreq);
ayemu_set_stereo (&info->ay, info->decoder->stereo, NULL);
int samplerate = deadbeef->conf_get_int ("synth.samplerate", 44100);
info->left = 0;
info->vtx_pos = 0;
_info->plugin = &plugin;
_info->fmt.bps = deadbeef->conf_get_int ("vtx.bps", 16);;
if (_info->fmt.bps != 16 && _info->fmt.bps != 8) {
_info->fmt.bps = 16;
}
_info->fmt.channels = 2;
_info->fmt.samplerate = samplerate;
_info->fmt.channelmask = _info->fmt.channels == 1 ? DDB_SPEAKER_FRONT_LEFT : (DDB_SPEAKER_FRONT_LEFT | DDB_SPEAKER_FRONT_RIGHT);
_info->readpos = 0;
ayemu_set_sound_format (&info->ay, samplerate, _info->fmt.channels, _info->fmt.bps);
info->rate = _info->fmt.channels * _info->fmt.bps / 8;
return 0;
}
