Add a Read Only Memory Audio Source
This will come in handy for FIR, or short samples in combination with a Lua convolution processor.
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libs/ardour/ardour/audiorom.h
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50
libs/ardour/ardour/audiorom.h
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/*
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* Copyright (C) 2020 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __ardour_audio_rom_h__
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#define __ardour_audio_rom_h__
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#include "ardour/libardour_visibility.h"
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#include "ardour/readable.h"
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#include "ardour/types.h"
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namespace ARDOUR {
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class Session;
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class LIBARDOUR_API AudioRom : public Readable
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{
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public:
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static boost::shared_ptr<AudioRom> new_rom (Sample*, size_t);
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~AudioRom();
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samplecnt_t read (Sample*, samplepos_t pos, samplecnt_t cnt, int channel) const;
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samplecnt_t readable_length() const { return _size; }
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uint32_t n_channels () const { return 1; }
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private:
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AudioRom (Sample*, size_t);
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AudioRom (AudioRom const&);
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Sample* _rom;
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samplecnt_t _size;
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};
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}
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#endif /* __ardour_readable_h__ */
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54
libs/ardour/audiorom.cc
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54
libs/ardour/audiorom.cc
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/*
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* Copyright (C) 2020 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "pbd/failed_constructor.h"
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#include "ardour/audiorom.h"
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using namespace ARDOUR;
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AudioRom::AudioRom (Sample* rom, size_t size)
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: _size (size)
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{
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_rom = (Sample*) malloc (sizeof (Sample) * _size);
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if (!_rom) {
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throw failed_constructor ();
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}
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memcpy (_rom, rom, sizeof (Sample) * _size);
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}
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boost::shared_ptr<AudioRom>
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AudioRom::new_rom (Sample* rom, size_t size)
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{
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return boost::shared_ptr<AudioRom> (new AudioRom (rom, size));
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}
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AudioRom::~AudioRom ()
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{
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free (_rom);
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}
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samplecnt_t
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AudioRom::read (Sample* dst, samplepos_t pos, samplecnt_t cnt, int channel) const
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{
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if (channel != 0 || pos >= _size) {
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return 0;
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}
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samplecnt_t to_copy = std::min (cnt, _size - pos);
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memcpy (dst, &_rom[pos], sizeof (Sample) * _size);
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return to_copy;
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}
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@ -38,6 +38,7 @@ libardour_sources = [
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'audiofile_tagger.cc',
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'audiofilesource.cc',
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'audioregion.cc',
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'audiorom.cc',
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'audiosource.cc',
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'auditioner.cc',
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'automatable.cc',
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