void
channel_mask_splits(struct i_array *counts,
unsigned int channel_count,
unsigned int channel_mask) {
/*Although the WAVEFORMATEXTENSIBLE channel mask
supports more left/right channels than these,
everything beyond side-left/side-right
is stored with a center channel in-between
which means we can't pull them apart in pairs.*/
unsigned int masks[] = {0x3, 0x1, 0x2, /*fLfR, fL, fR*/
0x4, 0x8, /*fC, LFE*/
0x30, 0x10, 0x20, /*bLbR, bL, bR*/
0xC0, 0x40, 0x80, /*fLoC, fRoC, fLoC, fRoC*/
0x100, /*bC*/
0x600, 0x200, 0x400, /*sLsR, sL, sR*/
0};
unsigned int channels;
int i;
assert(channel_count > 0);
/*first, try to pull left/right channels out of the mask*/
for (i = 0; channel_mask && masks[i]; i++) {
if (channel_mask & masks[i]) {
channels = count_one_bits(masks[i]);
ia_append(counts, channels);
channel_count -= channels;
channel_mask ^= masks[i];
}
}
/*any leftover channels are sent out in separate blocks
(which may happen with a mask of 0)*/
for (; channel_count > 0; channel_count--) {
ia_append(counts, 1);
}
}
static int build_array(char *plink_dir)
{
int err;
DIR *dp;
struct dirent *de;
char *p;
ino_t ino;
err = access(plink_dir, F_OK);
if (err)
return 0;
err = 0;
dp = opendir(plink_dir);
if (!dp)
AuFin("%s", plink_dir);
while ((de = readdir(dp))) {
if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
continue;
#if 0
if (de->d_type == DT_DIR) {
errno = EISDIR;
AuFin(de->d_name);
}
#endif
err = na_append(plink_dir, de->d_name);
if (err)
break;
p = strchr(de->d_name, '.');
if (!p) {
errno = EINVAL;
AuFin("internal error, %s", de->d_name);
}
*p = 0;
errno = 0;
ino = strtoull(de->d_name, NULL, 0);
if (ino == /*ULLONG_MAX*/-1 && errno == ERANGE)
AuFin("internal error, %s", de->d_name);
err = ia_append(ino);
if (err)
break;
}
closedir(dp);
return err;
}
