/*
Copyright (C) 2006 Paul Davis
- Written by Dave Robillard, 2006
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
#ifndef __ardour_buffer_h__
#define __ardour_buffer_h__
-#define _XOPEN_SOURCE 600
-#include <cstdlib> // for posix_memalign
+#include <cstdlib>
#include <cassert>
+#include <cstring>
+#include <iostream>
+#include <boost/utility.hpp>
+
#include <ardour/types.h>
-#include <jack/jack.h>
+#include <ardour/data_type.h>
+#include <ardour/runtime_functions.h>
namespace ARDOUR {
-/* Yes, this is a bit of a mess right now. I'll clean it up when everything
- * using it works out.. */
-
-
/** A buffer of recordable/playable data.
*
* This is a datatype-agnostic base class for all buffers (there are no
*
* To actually read/write buffer contents, use the appropriate derived class.
*/
-class Buffer
+class Buffer : public boost::noncopyable
{
public:
- Buffer(DataType type, size_t capacity)
- : _type(type), _capacity(capacity), _size(0)
- {}
-
virtual ~Buffer() {}
+ /** Factory function */
+ static Buffer* create(DataType type, size_t capacity);
+
/** Maximum capacity of buffer.
* Note in some cases the entire buffer may not contain valid data, use size. */
size_t capacity() const { return _capacity; }
/** Type of this buffer.
* Based on this you can static cast a Buffer* to the desired type. */
- virtual DataType type() const { return _type; }
+ DataType type() const { return _type; }
- /** Jack type (eg JACK_DEFAULT_AUDIO_TYPE) */
- const char* jack_type() const { return type_to_jack_type(type()); }
+ bool silent() const { return _silent; }
- /** String type as saved in session XML files (eg "audio" or "midi") */
- const char* type_string() const { return type_to_string(type()); }
-
- /* The below static methods need to be separate from the above methods
- * because the conversion is needed in places where there's no Buffer.
- * These should probably live somewhere else...
+ /** Reallocate the buffer used internally to handle at least @a size_t units of data.
+ *
+ * The buffer is not silent after this operation. the @a capacity argument
+ * passed to the constructor must have been non-zero.
*/
-
- static const char* type_to_jack_type(DataType t) {
- switch (t) {
- case AUDIO: return JACK_DEFAULT_AUDIO_TYPE;
- case MIDI: return JACK_DEFAULT_MIDI_TYPE;
- default: return "";
- }
- }
+ virtual void resize(size_t) = 0;
+
+ /** Clear (eg zero, or empty) buffer starting at TIME @a offset */
+ virtual void silence(nframes_t len, nframes_t offset=0) = 0;
+
+ /** Clear the entire buffer */
+ virtual void clear() { silence(_capacity, 0); }
- static const char* type_to_string(DataType t) {
- switch (t) {
- case AUDIO: return "audio";
- case MIDI: return "midi";
- default: return "unknown"; // reeeally shouldn't ever happen
- }
- }
-
- /** Used for loading from XML (route default types etc) */
- static DataType type_from_string(const string& str) {
- if (str == "audio")
- return AUDIO;
- else if (str == "midi")
- return MIDI;
- else
- return NIL;
- }
-
-protected:
+ virtual void read_from(const Buffer& src, nframes_t offset, nframes_t len) = 0;
+
+ protected:
+ Buffer(DataType type, size_t capacity)
+ : _type(type), _capacity(capacity), _size(0), _silent(true)
+ {}
+
DataType _type;
size_t _capacity;
size_t _size;
-};
-
-
-/* Inside every class with a type in it's name is a template waiting to get out... */
-
-
-/** Buffer containing 32-bit floating point (audio) data. */
-class AudioBuffer : public Buffer
-{
-public:
- AudioBuffer(size_t capacity)
- : Buffer(AUDIO, capacity)
- , _data(NULL)
- {
- _size = capacity; // For audio buffers, size = capacity (always)
-#ifdef NO_POSIX_MEMALIGN
- b = (Sample *) malloc(sizeof(Sample) * capacity);
-#else
- posix_memalign((void**)_data, 16, sizeof(Sample) * capacity);
-#endif
- assert(_data);
- memset(_data, 0, sizeof(Sample) * capacity);
- }
-
- const Sample* data() const { return _data; }
- Sample* data() { return _data; }
-
-private:
- // These are undefined (prevent copies)
- AudioBuffer(const AudioBuffer& copy);
- AudioBuffer& operator=(const AudioBuffer& copy);
-
- Sample* const _data; ///< Actual buffer contents
+ bool _silent;
};