Fix #51: Only return valid part of the buffer in the read function; avoid unnecesssary work by only changing size when needed

This commit is contained in:
Ronald van Elburg
2020-09-30 15:58:19 +02:00
parent 1e3c7f3fd0
commit 5c481b4094

View File

@@ -1051,7 +1051,7 @@ alsapcm_read(alsapcm_t *self, PyObject *args)
{
int res;
int size = self->framesize * self->periodsize;
int sizeout;
int sizeout = 0;
PyObject *buffer_obj, *tuple_obj, *res_obj;
char *buffer;
@@ -1106,12 +1106,11 @@ alsapcm_read(alsapcm_t *self, PyObject *args)
}
}
if (res <= 0) {
sizeout = 0;
} else {
if (res > 0 ) {
sizeout = res * self->framesize;
}
if (size != sizeout) {
#if PY_MAJOR_VERSION < 3
/* If the following fails, it will free the object */
if (_PyString_Resize(&buffer_obj, sizeout))
@@ -1121,7 +1120,8 @@ alsapcm_read(alsapcm_t *self, PyObject *args)
if (_PyBytes_Resize(&buffer_obj, sizeout))
return NULL;
#endif
}
res_obj = PyLong_FromLong(res);
if (!res_obj) {
Py_DECREF(buffer_obj);