2 Copyright (C) 2006-2007 Paul Davis
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2 of the License, or (at your option)
9 This program is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation, Inc.,
16 675 Mass Ave, Cambridge, MA 02139, USA.
19 #include <ardour/audio_buffer.h>
20 #include <pbd/error.h>
26 static const int CPU_CACHE_ALIGN = 64;
28 static const int CPU_CACHE_ALIGN = 16; /* arguably 32 on most arches, but it matters less */
32 using namespace ARDOUR;
34 AudioBuffer::AudioBuffer(size_t capacity)
35 : Buffer(DataType::AUDIO, capacity)
40 _owns_data = true; // prevent resize() from gagging
42 _silent = false; // force silence on the intial buffer state
47 AudioBuffer::~AudioBuffer()
53 /* called to replace a pointer to an external buffer (e.g. JACK) with
58 AudioBuffer::replace_data (size_t capacity)
62 _capacity = 0; // force reallocation
67 AudioBuffer::resize (size_t size)
73 if (size < _capacity) {
86 #ifdef NO_POSIX_MEMALIGN
87 _data = (Sample *) malloc(sizeof(Sample) * _capacity);
89 if (posix_memalign((void**)&_data, CPU_CACHE_ALIGN, sizeof(Sample) * _capacity)) {
90 fatal << string_compose (_("Memory allocation error: posix_memalign (%1 * %2) failed (%3)"),
91 CPU_CACHE_ALIGN, sizeof (Sample) * _capacity, strerror (errno)) << endmsg;
98 AudioBuffer::copy_to_internal (Sample* p, nframes_t cnt, nframes_t offset)
100 memcpy (_data + offset, p, sizeof(Sample*) * cnt);