/*
- 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 <errno.h>
+
#include "ardour/audio_buffer.h"
#include "pbd/error.h"
-#include <errno.h>
+#include "pbd/malign.h"
#include "i18n.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
-
using namespace PBD;
using namespace ARDOUR;
AudioBuffer::AudioBuffer(size_t capacity)
- : Buffer(DataType::AUDIO, capacity)
+ : Buffer (DataType::AUDIO)
, _owns_data (false)
, _data (0)
{
- if (_capacity > 0) {
+ if (capacity) {
_owns_data = true; // prevent resize() from gagging
- resize (_capacity);
+ resize (capacity);
_silent = false; // force silence on the intial buffer state
- silence (_capacity);
+ clear ();
}
}
free(_data);
}
-/* called to replace a pointer to an external buffer (e.g. JACK) with
- buffer-owned memory.
-*/
-
-void
-AudioBuffer::replace_data (size_t capacity)
-{
- _owns_data = true;
- _data = 0;
- _capacity = 0; // force reallocation
- resize (capacity);
-}
-
void
AudioBuffer::resize (size_t size)
{
if (!_owns_data) {
+ /* XXX how the hell is this enforced? */
+ _capacity = size;
return;
}
- if (size < _capacity) {
- _size = size;
+ if (_data && size < _capacity) {
+ /* buffer is already large enough */
return;
}
- if (_data) {
- free (_data);
- }
+ free (_data);
+
+ cache_aligned_malloc ((void**) &_data, sizeof (Sample) * size);
_capacity = size;
- _size = size;
_silent = false;
+}
-#ifdef NO_POSIX_MEMALIGN
- _data = (Sample *) malloc(sizeof(Sample) * _capacity);
-#else
- if (posix_memalign((void**)&_data, CPU_CACHE_ALIGN, sizeof(Sample) * _capacity)) {
- fatal << string_compose (_("Memory allocation error: posix_memalign (%1 * %2) failed (%3)"),
- CPU_CACHE_ALIGN, sizeof (Sample) * _capacity, strerror (errno)) << endmsg;
+bool
+AudioBuffer::check_silence (pframes_t nframes, pframes_t& n) const
+{
+ for (n = 0; n < nframes; ++n) {
+ if (_data[n] != Sample (0)) {
+ return false;
+ }
}
-#endif
-
+ return true;
}
void
-AudioBuffer::copy_to_internal (Sample* p, nframes_t cnt, nframes_t offset)
-{
- memcpy (_data + offset, p, sizeof(Sample*) * cnt);
+AudioBuffer::silence (framecnt_t len, framecnt_t offset) {
+
+ if (!_silent) {
+ assert(_capacity > 0);
+ assert(offset + len <= _capacity);
+ memset(_data + offset, 0, sizeof (Sample) * len);
+ if (len == _capacity) {
+ _silent = true;
+ }
+ }
+ _written = true;
}
-