/*
- Copyright (C) 2006 Paul Davis
-
+ Copyright (C) 2006 Paul Davis
+
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.,
675 Mass Ave, Cambridge, MA 02139, USA.
#ifndef __ardour_buffer_h__
#define __ardour_buffer_h__
-#include <cstdlib>
-#include <cassert>
-#include <iostream>
-#include <ardour/types.h>
-#include <ardour/data_type.h>
-#include <ardour/runtime_functions.h>
+#include <stddef.h>
+
+#include <boost/utility.hpp>
+
+#include "ardour/libardour_visibility.h"
+#include "ardour/types.h"
+#include "ardour/data_type.h"
namespace ARDOUR {
* methods to actually access the data). This provides a way for code that
* doesn't care about the data type to still deal with buffers (which is
* why the base class can't be a template).
- *
+ *
* To actually read/write buffer contents, use the appropriate derived class.
*/
-class Buffer
+class LIBARDOUR_API Buffer : public boost::noncopyable
{
public:
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. */
+ /** Maximum capacity of buffer. */
size_t capacity() const { return _capacity; }
- /** Amount of valid data in buffer. Use this over capacity almost always. */
- size_t size() const { return _size; }
-
/** Type of this buffer.
* Based on this you can static cast a Buffer* to the desired type. */
DataType type() const { return _type; }
bool silent() const { return _silent; }
- /** Clear (eg zero, or empty) buffer starting at TIME @a offset */
- virtual void silence(jack_nframes_t len, jack_nframes_t offset=0) = 0;
-
+ /** 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.
+ */
+ virtual void resize (size_t) = 0;
+
+ /** Clear (eg zero, or empty) buffer */
+ virtual void silence (framecnt_t len, framecnt_t offset = 0) = 0;
+
/** Clear the entire buffer */
virtual void clear() { silence(_capacity, 0); }
- virtual void read_from(const Buffer& src, jack_nframes_t offset, jack_nframes_t len) = 0;
+ virtual void read_from (const Buffer& src, framecnt_t len, framecnt_t dst_offset = 0, framecnt_t src_offset = 0) = 0;
+ virtual void merge_from (const Buffer& src, framecnt_t len, framecnt_t dst_offset = 0, framecnt_t src_offset = 0) = 0;
-protected:
- Buffer(DataType type, size_t capacity)
- : _type(type), _capacity(capacity), _size(0), _silent(true)
+ protected:
+ Buffer(DataType type)
+ : _type(type), _capacity(0), _silent (true)
{}
- DataType _type;
- size_t _capacity;
- size_t _size;
- bool _silent;
-
-private:
- // Prevent copies (undefined)
- Buffer(const Buffer& copy);
- void operator=(const Buffer& other);
+ DataType _type;
+ pframes_t _capacity;
+ bool _silent;
};
-/* 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);
-
- ~AudioBuffer();
-
- void silence(jack_nframes_t len, jack_nframes_t offset=0)
- {
- if (!_silent) {
- assert(_capacity > 0);
- assert(offset + len <= _capacity);
- memset(_data + offset, 0, sizeof (Sample) * len);
- if (offset == 0 && len == _capacity) {
- _silent = true;
- }
- }
- }
-
- /** Read @a len frames FROM THE START OF @a src into self at @a offset */
- void read_from(const Buffer& src, jack_nframes_t len, jack_nframes_t offset)
- {
- assert(_capacity > 0);
- assert(src.type() == _type == DataType::AUDIO);
- assert(offset + len <= _capacity);
- memcpy(_data + offset, ((AudioBuffer&)src).data(len), sizeof(Sample) * len);
- _silent = src.silent();
- }
-
- /** Accumulate (add)@a len frames FROM THE START OF @a src into self at @a offset */
- void accumulate_from(const AudioBuffer& src, jack_nframes_t len, jack_nframes_t offset)
- {
- assert(_capacity > 0);
- assert(offset + len <= _capacity);
-
- Sample* const dst_raw = _data + offset;
- const Sample* const src_raw = src.data(len);
-
- for (jack_nframes_t n = 0; n < len; ++n) {
- dst_raw[n] += src_raw[n];
- }
-
- _silent = (src.silent() && _silent);
- }
-
- /** Accumulate (add) @a len frames FROM THE START OF @a src into self at @a offset
- * scaling by @a gain_coeff */
- void accumulate_with_gain_from(const AudioBuffer& src, jack_nframes_t len, jack_nframes_t offset, gain_t gain_coeff)
- {
- assert(_capacity > 0);
- assert(offset + len <= _capacity);
-
- Sample* const dst_raw = _data + offset;
- const Sample* const src_raw = src.data(len);
-
- mix_buffers_with_gain (dst_raw, src_raw, len, gain_coeff);
-
- _silent = ( (src.silent() && _silent) || (_silent && gain_coeff == 0) );
- }
-
- void apply_gain(gain_t gain, jack_nframes_t len, jack_nframes_t offset=0) {
- apply_gain_to_buffer (_data + offset, len, gain);
- }
-
- /** Set the data contained by this buffer manually (for setting directly to jack buffer).
- *
- * Constructor MUST have been passed capacity=0 or this will die (to prevent mem leaks).
- */
- void set_data(Sample* data, size_t size)
- {
- assert(!_owns_data); // prevent leaks
- _capacity = size;
- _size = size;
- _data = data;
- _silent = false;
- }
-
- const Sample* data(jack_nframes_t nframes, jack_nframes_t offset=0) const
- { assert(offset + nframes <= _capacity); return _data + offset; }
-
- Sample* data(jack_nframes_t nframes, jack_nframes_t offset=0)
- { assert(offset + nframes <= _capacity); return _data + offset; }
-
-private:
- // These are undefined (prevent copies)
- AudioBuffer(const AudioBuffer& copy);
- AudioBuffer& operator=(const AudioBuffer& copy);
-
- bool _owns_data;
- Sample* _data; ///< Actual buffer contents
-};
-
-
-
-/** Buffer containing 8-bit unsigned char (MIDI) data. */
-class MidiBuffer : public Buffer
-{
-public:
- MidiBuffer(size_t capacity);
-
- ~MidiBuffer();
-
- void silence(jack_nframes_t dur, jack_nframes_t offset=0);
-
- void read_from(const Buffer& src, jack_nframes_t nframes, jack_nframes_t offset);
-
- bool push_back(const MidiEvent& event);
-
- const MidiEvent& operator[](size_t i) const { assert(i < _size); return _events[i]; }
- MidiEvent& operator[](size_t i) { assert(i < _size); return _events[i]; }
-
- static size_t max_event_size() { return MAX_EVENT_SIZE; }
-
- //void set_size(size_t size) { _size = size; }
-
- //const RawMidi* data() const { return _data; }
- //RawMidi* data() { return _data; }
-
-private:
- // These are undefined (prevent copies)
- MidiBuffer(const MidiBuffer& copy);
- MidiBuffer& operator=(const MidiBuffer& copy);
-
- // FIXME: Jack needs to tell us this
- static const size_t MAX_EVENT_SIZE = 4; // bytes
-
- /* We use _size as "number of events", so the size of _data is
- * (_size * MAX_EVENT_SIZE)
- */
-
- MidiEvent* _events; ///< Event structs that point to offsets in _data
- RawMidi* _data; ///< MIDI, straight up. No time stamps.
-};
-
} // namespace ARDOUR
#endif // __ardour_buffer_h__
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