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'libs/panners' - Use 'alloca()' for a stack based array whose size is unknown (required to be buildable with MSVC)

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This commit is contained in:
John Emmas 2013-09-03 14:46:01 +01:00
parent a431e73ccd
commit 86a3910814
1 changed files with 7 additions and 5 deletions
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12
libs/panners/vbap/vbap.cc
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@ -25,6 +25,8 @@
#include <iostream>
#include <string>
#include <malloc.h>
#include "pbd/cartesian.h"
#include "pbd/compose.h"
@ -290,7 +292,7 @@ VBAPanner::distribute_one (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_co
assert (sz == obufs.count().n_audio());
int8_t outputs[sz]; // on the stack, no malloc
int8_t *outputs = (int8_t*)alloca(sz); // on the stack, no malloc
/* set initial state of each output "record"
*/
@ -319,10 +321,10 @@ VBAPanner::distribute_one (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_co
/* at this point, we can test a speaker's status:
(outputs[o] & 1) <= in use before
(outputs[o] & 2) <= in use this time
(outputs[o] & 3) == 3 <= in use both times
outputs[o] == 0 <= not in use either time
(*outputs[o] & 1) <= in use before
(*outputs[o] & 2) <= in use this time
(*outputs[o] & 3) == 3 <= in use both times
*outputs[o] == 0 <= not in use either time
*/