/*
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 <iostream>
#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
class Buffer
{
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; }
-
- /** Jack type (eg JACK_DEFAULT_AUDIO_TYPE) */
- const char* jack_type() const { return type_to_jack_type(type()); }
-
- /** String type as saved in session XML files (eg "audio" or "midi") */
- const char* type_string() const { return type_to_string(type()); }
+ DataType type() const { return _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...
- */
+ bool silent() const { return _silent; }
- 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 "";
- }
- }
+ /** Clear (eg zero, or empty) buffer starting at TIME @a offset */
+ virtual void silence(nframes_t len, nframes_t offset=0) = 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
- }
- }
+ /** Clear the entire buffer */
+ virtual void clear() { silence(_capacity, 0); }
- /** 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;
- }
+ 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;
+ bool _silent;
+
+private:
+ // Prevent copies (undefined)
+ Buffer(const Buffer& copy);
+ void operator=(const Buffer& other);
};
class AudioBuffer : public Buffer
{
public:
- AudioBuffer(size_t capacity)
- : Buffer(AUDIO, capacity)
- , _data(NULL)
+ AudioBuffer(size_t capacity);
+
+ ~AudioBuffer();
+
+ void silence(nframes_t len, 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, nframes_t len, nframes_t offset)
+ {
+ assert(_capacity > 0);
+ assert(src.type() == _type == DataType::AUDIO);
+ assert(offset + len <= _capacity);
+ memcpy(_data + offset, ((AudioBuffer&)src).data(), 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, nframes_t len, nframes_t offset)
+ {
+ assert(_capacity > 0);
+ assert(offset + len <= _capacity);
+
+ Sample* const dst_raw = _data + offset;
+ const Sample* const src_raw = src.data();
+
+ for (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, nframes_t len, nframes_t offset, gain_t gain_coeff)
{
- _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);
+ assert(_capacity > 0);
+ assert(offset + len <= _capacity);
+
+ Sample* const dst_raw = _data + offset;
+ const Sample* const src_raw = src.data();
+
+ 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, nframes_t len, nframes_t offset=0) {
+ apply_gain_to_buffer (_data + offset, len, gain);
}
- const Sample* data() const { return _data; }
- Sample* data() { return _data; }
+ /** 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 () const { return _data; }
+ Sample* data () { return _data; }
+
+ const Sample* data(nframes_t nframes, nframes_t offset) const
+ { assert(offset + nframes <= _capacity); return _data + offset; }
+
+ Sample* data (nframes_t nframes, nframes_t offset)
+ { assert(offset + nframes <= _capacity); return _data + offset; }
private:
// These are undefined (prevent copies)
AudioBuffer(const AudioBuffer& copy);
AudioBuffer& operator=(const AudioBuffer& copy);
- Sample* const _data; ///< Actual buffer contents
+ 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(nframes_t dur, nframes_t offset=0);
+
+ void read_from(const Buffer& src, nframes_t nframes, 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__
projects / ardour.git / blobdiff