/*
- Copyright (C) 2006-2007 Paul Davis
-
+ Copyright (C) 2006-2007 Paul Davis
+
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
-
+
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
-
+
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <ardour/audio_buffer.h>
+#include <errno.h>
-#ifdef __x86_64__
-static const int CPU_CACHE_ALIGN = 64;
-#else
-static const int CPU_CACHE_ALIGN = 16; /* arguably 32 on most arches, but it matters less */
-#endif
+#include "ardour/audio_buffer.h"
+#include "pbd/error.h"
+#include "pbd/malign.h"
-namespace ARDOUR {
+#include "i18n.h"
+using namespace PBD;
+using namespace ARDOUR;
AudioBuffer::AudioBuffer(size_t capacity)
: Buffer(DataType::AUDIO, capacity)
- , _owns_data(false)
- , _data(NULL)
+ , _owns_data (false)
+ , _data (0)
{
- _size = capacity; // For audio buffers, size = capacity (always)
- if (capacity > 0) {
-#ifdef NO_POSIX_MEMALIGN
- _data = (Sample *) malloc(sizeof(Sample) * capacity);
-#else
- posix_memalign((void**)&_data, CPU_CACHE_ALIGN, sizeof(Sample) * capacity);
-#endif
- assert(_data);
- _owns_data = true;
- clear();
+ if (_capacity > 0) {
+ _owns_data = true; // prevent resize() from gagging
+ resize (_capacity);
+ _silent = false; // force silence on the intial buffer state
+ silence (_capacity);
}
}
free(_data);
}
+void
+AudioBuffer::resize (size_t size)
+{
+ if (!_owns_data) {
+ return;
+ }
+
+ if (size < _capacity) {
+ _size = size;
+ return;
+ }
+
+ free (_data);
+
+ _capacity = size;
+ _size = size;
+ _silent = false;
+
+ cache_aligned_malloc ((void**) &_data, sizeof (Sample) * _capacity);
+}
-} // namespace ARDOUR