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Added minmax function:

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-- function of module audioop: minmax (FRAGMENT, WIDTH)
    Minmax returns a tuple consisting of the minimum and maximum
    values of all samples in the sound fragment.
This commit is contained in:
Sjoerd Mullender 1993-12-13 12:06:27 +00:00
parent 43bf0bc857
commit c4801ed513
1 changed files with 27 additions and 0 deletions
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27
Modules/audioop.c
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@ -212,6 +212,32 @@ audioop_max(self, args)
return newintobject(max);
}
static object *
audioop_minmax(self, args)
object *self;
object *args;
{
signed char *cp;
int len, size, val;
int i;
int min = 0x7fffffff, max = -0x7fffffff;
if (!getargs(args, "(s#i)", &cp, &len, &size))
return NULL;
if (size != 1 && size != 2 && size != 4) {
err_setstr(AudioopError, "Size should be 1, 2 or 4");
return NULL;
}
for (i = 0; i < len; i += size) {
if (size == 1) val = (int) *CHARP(cp, i);
else if (size == 2) val = (int) *SHORTP(cp, i);
else if (size == 4) val = (int) *LONGP(cp, i);
if (val > max) max = val;
if (val < min) min = val;
}
return mkvalue("(ii)", min, max);
}
static object *
audioop_avg(self, args)
object *self;
@ -1304,6 +1330,7 @@ audioop_adpcm2lin(self, args)
static struct methodlist audioop_methods[] = {
{ "max", audioop_max },
{ "minmax", audioop_minmax },
{ "avg", audioop_avg },
{ "maxpp", audioop_maxpp },
{ "avgpp", audioop_avgpp },