131 lines
2.9 KiB
C
131 lines
2.9 KiB
C
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/*
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Audio File Library
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Copyright (C) 2000, Silicon Graphics, Inc.
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Copyright (C) 2010, Michael Pruett <michael@68k.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301 USA
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*/
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#ifndef MODULE_H
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#define MODULE_H
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#include "AudioFormat.h"
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#include "Shared.h"
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#include "afinternal.h"
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#include <vector>
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enum FormatCode
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{
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kUndefined = -1,
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kInt8,
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kInt16,
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kInt24,
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kInt32,
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kFloat,
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kDouble,
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};
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class Chunk : public Shared<Chunk>
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{
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public:
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void *buffer;
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size_t frameCount;
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AudioFormat f;
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bool ownsMemory;
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Chunk() : buffer(NULL), frameCount(0), ownsMemory(false) { }
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~Chunk()
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{
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deallocate();
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}
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void allocate(size_t capacity)
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{
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deallocate();
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ownsMemory = true;
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buffer = ::operator new(capacity);
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}
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void deallocate()
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{
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if (ownsMemory)
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::operator delete(buffer);
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ownsMemory = false;
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buffer = NULL;
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}
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};
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class Module : public Shared<Module>
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{
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public:
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Module();
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virtual ~Module();
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void setSink(Module *);
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void setSource(Module *);
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Chunk *inChunk() const { return m_inChunk.get(); }
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void setInChunk(Chunk *chunk) { m_inChunk = chunk; }
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Chunk *outChunk() const { return m_outChunk.get(); }
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void setOutChunk(Chunk *chunk) { m_outChunk = chunk; }
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virtual const char *name() const;
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/*
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Set format of m_outChunk based on how this module transforms m_inChunk.
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*/
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virtual void describe();
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/*
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Set frame count of m_inChunk to the maximum number of frames needed to
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produce frame count of m_outChunk.
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*/
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virtual void maxPull();
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/*
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Set frame count of m_outChunk to the maximum number of frames needed to
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produce frame count of m_inChunk.
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*/
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virtual void maxPush();
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virtual void runPull();
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virtual void reset1() { }
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virtual void reset2() { }
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virtual void runPush();
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virtual void sync1() { }
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virtual void sync2() { }
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protected:
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SharedPtr<Chunk> m_inChunk, m_outChunk;
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union
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{
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Module *m_sink;
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Module *m_source;
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};
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void pull(size_t frames);
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void push(size_t frames);
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};
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/*
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_AF_ATOMIC_NVFRAMES is NOT the maximum number of frames a module
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can be requested to produce.
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This IS the maximum number of virtual (user) frames that will
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be produced or processed per run of the modules.
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Modules can be requested more frames than this because of rate
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conversion and rebuffering.
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*/
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#define _AF_ATOMIC_NVFRAMES 1024
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#endif // MODULE_H
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