2 Copyright (C) 2006 Paul Davis
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2 of the License, or (at your option)
9 This program is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation, Inc.,
16 675 Mass Ave, Cambridge, MA 02139, USA.
19 #ifndef __ardour_buffer_set_h__
20 #define __ardour_buffer_set_h__
23 #include "libardour-config.h"
28 #include "ardour/chan_count.h"
29 #include "ardour/data_type.h"
30 #include "ardour/types.h"
33 #include "evoral/MIDIEvent.hpp"
48 /** A set of buffers of various types.
50 * These are mainly accessed from Session and passed around as scratch buffers
51 * (eg as parameters to run() methods) to do in-place signal processing.
53 * There are two types of counts associated with a BufferSet - available,
54 * and the 'use count'. Available is the actual number of allocated buffers
55 * (and so is the maximum acceptable value for the use counts).
57 * The use counts are how things determine the form of their input and inform
58 * others the form of their output (eg what they did to the BufferSet).
59 * Setting the use counts is realtime safe.
69 void attach_buffers(PortSet& ports, nframes_t nframes, nframes_t offset = 0);
71 /* the capacity here is a size_t and has a different interpretation depending
72 on the DataType of the buffers. for audio, its a frame count. for MIDI
76 void ensure_buffers(DataType type, size_t num_buffers, size_t buffer_capacity);
77 void ensure_buffers(const ChanCount& chns, size_t buffer_capacity);
79 const ChanCount& available() const { return _available; }
80 ChanCount& available() { return _available; }
82 const ChanCount& count() const { return _count; }
83 ChanCount& count() { return _count; }
85 void is_silent(bool yn);
86 void silence (nframes_t nframes, nframes_t offset);
87 bool is_mirror() const { return _is_mirror; }
89 void set_count(const ChanCount& count) { assert(count <= _available); _count = count; }
91 size_t buffer_capacity(DataType type) const;
93 Buffer& get(DataType type, size_t i);
94 const Buffer& get(DataType type, size_t i) const;
96 AudioBuffer& get_audio(size_t i) {
97 return (AudioBuffer&)get(DataType::AUDIO, i);
100 MidiBuffer& get_midi(size_t i) {
101 return (MidiBuffer&)get(DataType::MIDI, i);
105 /** Get a MIDI buffer translated into an LV2 MIDI buffer for use with plugins.
106 * The index here corresponds directly to MIDI buffer numbers (i.e. the index
107 * passed to get_midi), translation back and forth will happen as needed */
108 LV2EventBuffer& get_lv2_midi(bool input, size_t i);
110 /** Flush modified LV2 event output buffers back to Ardour buffers */
111 void flush_lv2_midi(bool input, size_t i);
115 VstEvents* get_vst_midi (size_t);
118 void read_from(const BufferSet& in, nframes_t nframes);
119 void merge_from(const BufferSet& in, nframes_t nframes);
121 template <typename BS, typename B>
122 class iterator_base {
124 B& operator*() { return (B&)_set.get(_type, _index); }
125 B* operator->() { return &(B&)_set.get(_type, _index); }
126 iterator_base<BS,B>& operator++() { ++_index; return *this; } // yes, prefix only
127 bool operator==(const iterator_base<BS,B>& other) { return (_index == other._index); }
128 bool operator!=(const iterator_base<BS,B>& other) { return (_index != other._index); }
129 iterator_base<BS,B> operator=(const iterator_base<BS,B>& other) {
130 _set = other._set; _type = other._type; _index = other._index; return *this;
134 friend class BufferSet;
136 iterator_base(BS& list, DataType type, size_t index)
137 : _set(list), _type(type), _index(index) {}
144 typedef iterator_base<BufferSet, Buffer> iterator;
145 iterator begin(DataType type) { return iterator(*this, type, 0); }
146 iterator end(DataType type) { return iterator(*this, type, _count.get(type)); }
148 typedef iterator_base<const BufferSet, const Buffer> const_iterator;
149 const_iterator begin(DataType type) const { return const_iterator(*this, type, 0); }
150 const_iterator end(DataType type) const { return const_iterator(*this, type, _count.get(type)); }
152 typedef iterator_base<BufferSet, AudioBuffer> audio_iterator;
153 audio_iterator audio_begin() { return audio_iterator(*this, DataType::AUDIO, 0); }
154 audio_iterator audio_end() { return audio_iterator(*this, DataType::AUDIO, _count.n_audio()); }
156 typedef iterator_base<BufferSet, MidiBuffer> midi_iterator;
157 midi_iterator midi_begin() { return midi_iterator(*this, DataType::MIDI, 0); }
158 midi_iterator midi_end() { return midi_iterator(*this, DataType::MIDI, _count.n_midi()); }
161 typedef std::vector<Buffer*> BufferVec;
163 /// Vector of vectors, indexed by DataType
164 std::vector<BufferVec> _buffers;
167 /// LV2 MIDI buffers (for conversion to/from MIDI buffers)
168 typedef std::vector< std::pair<bool, LV2EventBuffer*> > LV2Buffers;
169 LV2Buffers _lv2_buffers;
179 void push_back (Evoral::MIDIEvent<nframes_t> const &);
180 VstEvents* events () const {
185 /* prevent copy construction */
186 VSTBuffer (VSTBuffer const &);
188 VstEvents* _events; /// the parent VSTEvents struct
189 VstMidiEvent* _midi_events; ///< storage area for VSTMidiEvents
193 typedef std::vector<VSTBuffer*> VSTBuffers;
194 VSTBuffers _vst_buffers;
197 /// Use counts (there may be more actual buffers than this)
200 /// Available counts (number of buffers actually allocated)
201 ChanCount _available;
203 /// False if we 'own' the contained buffers, if true we mirror a PortSet)
208 } // namespace ARDOUR
210 #endif // __ardour_buffer_set_h__