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.
21 using std::cerr; using std::endl;
23 #include <ardour/buffer.h>
29 Buffer::create(DataType type, size_t capacity)
31 if (type == DataType::AUDIO)
32 return new AudioBuffer(capacity);
33 else if (type == DataType::MIDI)
34 return new MidiBuffer(capacity);
40 AudioBuffer::AudioBuffer(size_t capacity)
41 : Buffer(DataType::AUDIO, capacity)
45 _size = capacity; // For audio buffers, size = capacity (always)
47 #ifdef NO_POSIX_MEMALIGN
48 _data = (Sample *) malloc(sizeof(Sample) * capacity);
50 posix_memalign((void**)&_data, 16, sizeof(Sample) * capacity);
58 AudioBuffer::~AudioBuffer()
64 // FIXME: mirroring for MIDI buffers?
65 MidiBuffer::MidiBuffer(size_t capacity)
66 : Buffer(DataType::MIDI, capacity)
75 #ifdef NO_POSIX_MEMALIGN
76 _events = (MidiEvent *) malloc(sizeof(MidiEvent) * capacity);
77 _data = (RawMidi *) malloc(sizeof(RawMidi) * capacity * MAX_EVENT_SIZE);
79 posix_memalign((void**)&_events, 16, sizeof(MidiEvent) * capacity);
80 posix_memalign((void**)&_data, 16, sizeof(RawMidi) * capacity * MAX_EVENT_SIZE);
87 MidiBuffer::~MidiBuffer()
94 /** Read events from @a src starting at time @a offset into the START of this buffer, for
95 * time direction @a nframes. Relative time, where 0 = start of buffer.
97 * Note that offset and nframes refer to sample time, NOT buffer offsets or event counts.
100 MidiBuffer::read_from(const Buffer& src, jack_nframes_t nframes, jack_nframes_t offset)
102 assert(src.type() == DataType::MIDI);
103 const MidiBuffer& msrc = (MidiBuffer&)src;
105 assert(_capacity >= src.size());
111 for (size_t i=0; i < src.size(); ++i) {
112 const MidiEvent& ev = msrc[i];
113 if (ev.time >= offset && ev.time < offset+nframes) {
118 _silent = src.silent();
122 /** Push an event into the buffer.
124 * Note that the raw MIDI pointed to by ev will be COPIED and unmodified.
125 * That is, the caller still owns it, if it needs freeing it's Not My Problem(TM).
127 * @return false if operation failed (not enough room)
130 MidiBuffer::push_back(const MidiEvent& ev)
132 if (_size == _capacity)
135 RawMidi* const write_loc = _data + (_size * MAX_EVENT_SIZE);
137 memcpy(write_loc, ev.buffer, ev.size);
139 _events[_size].buffer = write_loc;
142 //cerr << "MidiBuffer: pushed, size = " << _size << endl;
151 MidiBuffer::silence(jack_nframes_t dur, jack_nframes_t offset)
153 // FIXME use parameters
155 //assert(dur == _capacity);
157 memset(_events, 0, sizeof(MidiEvent) * _capacity);
158 memset(_data, 0, sizeof(RawMidi) * _capacity * MAX_EVENT_SIZE);
164 } // namespace ARDOUR