diff options
author | Robin Gareus <robin@gareus.org> | 2020-02-01 15:57:34 +0100 |
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committer | Robin Gareus <robin@gareus.org> | 2020-02-06 17:30:21 +0100 |
commit | 3483c3589a57384282ed94d3ea6294b6b891882f (patch) | |
tree | e69cea0660c2e9f45a267d302cc5b233e888dd6a /libs/ardour/audiorom.cc | |
parent | 5d3feaf91bc3ceda5f28ddd95b7debf9a4ba9917 (diff) |
Add a Read Only Memory Audio Source
This will come in handy for FIR, or short samples in combination
with a Lua convolution processor.
Diffstat (limited to 'libs/ardour/audiorom.cc')
-rw-r--r-- | libs/ardour/audiorom.cc | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/libs/ardour/audiorom.cc b/libs/ardour/audiorom.cc new file mode 100644 index 0000000000..4550ecf7f5 --- /dev/null +++ b/libs/ardour/audiorom.cc @@ -0,0 +1,54 @@ +/* + * Copyright (C) 2020 Robin Gareus <robin@gareus.org> + * + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "pbd/failed_constructor.h" +#include "ardour/audiorom.h" + +using namespace ARDOUR; + +AudioRom::AudioRom (Sample* rom, size_t size) + : _size (size) +{ + _rom = (Sample*) malloc (sizeof (Sample) * _size); + if (!_rom) { + throw failed_constructor (); + } + memcpy (_rom, rom, sizeof (Sample) * _size); +} + +boost::shared_ptr<AudioRom> +AudioRom::new_rom (Sample* rom, size_t size) +{ + return boost::shared_ptr<AudioRom> (new AudioRom (rom, size)); +} + +AudioRom::~AudioRom () +{ + free (_rom); +} + +samplecnt_t +AudioRom::read (Sample* dst, samplepos_t pos, samplecnt_t cnt, int channel) const +{ + if (channel != 0 || pos >= _size) { + return 0; + } + samplecnt_t to_copy = std::min (cnt, _size - pos); + memcpy (dst, &_rom[pos], sizeof (Sample) * _size); + return to_copy; +} |