ssize_t
fread_dyn(char **destp, size_t *n, FILE *stream)
{
const unsigned bsize = 8192;
size_t total = 0, cnt = 0;
assert(destp);
assert(n);
assert(stream);
if (!*destp)
*destp = xmalloc(*n = bsize);
while (1) {
cnt = fread(*destp+total, 1, *n-total, stream);
if (cnt != *n-total)
{
if (feof(stream))
return total+cnt;
else if (ferror(stream))
{
CWARNING3(filesys, "read error: %s", strerror(errno));
return -1;
}
}
total += cnt;
if (*n <= total)
*destp = xrealloc(*destp, *n *= 2);
}
}
ssize_t
load_audio_file(const char *name, char **data, size_t *size)
{
mm_file mf;
unsigned channels, rate;
const size_t def_size = 16 * 1024;
size_t offset = 0;
ssize_t read = 0;
double start = get_time();
/* make compiler happy */
start *= 1.0;
assert(name);
assert(data);
assert(size);
if (mm_open_fp(&mf, sOpen(name, "rb", FT_AUDIO)) < 0) {
return -1;
}
if (mm_audio_info(&mf, &channels, &rate) < 0) {
CWARNING3(audio, "no audio data in file `%s'", name);
mm_close(&mf);
return -1;
}
if (channels != 1 || rate != 11025) {
CERROR3(audio, "file `%s' should be mono, 11025Hz", name);
mm_close(&mf);
return -1;
}
if (!*data) {
*data = (char *)xmalloc(*size = def_size);
}
while (0 < (read = mm_decode_audio(&mf,
*data + offset, *size - offset))) {
offset += read;
if (*size <= offset) {
*data = (char *)xrealloc(*data, *size *= 2);
}
}
mm_close(&mf);
CDEBUG4(audio, "loading file `%s' took %5.4f seconds",
name, get_time() - start);
return offset;
}