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/*
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.
*/
#include <algorithm>
#include <iostream>
using std::cerr; using std::endl;
#include <ardour/buffer.h>
namespace ARDOUR {
Buffer*
Buffer::create(DataType type, size_t capacity)
{
if (type == DataType::AUDIO)
return new AudioBuffer(capacity);
else if (type == DataType::MIDI)
return new MidiBuffer(capacity);
else
return NULL;
}
AudioBuffer::AudioBuffer(size_t capacity)
: Buffer(DataType::AUDIO, capacity)
, _owns_data(false)
, _data(NULL)
{
_size = capacity; // For audio buffers, size = capacity (always)
if (capacity > 0) {
#ifdef NO_POSIX_MEMALIGN
_data = (Sample *) malloc(sizeof(Sample) * capacity);
#else
posix_memalign((void**)&_data, 16, sizeof(Sample) * capacity);
#endif
assert(_data);
_owns_data = true;
clear();
}
}
AudioBuffer::~AudioBuffer()
{
if (_owns_data)
free(_data);
}
// FIXME: mirroring for MIDI buffers?
MidiBuffer::MidiBuffer(size_t capacity)
: Buffer(DataType::MIDI, capacity)
// , _owns_data(true)
, _events(NULL)
, _data(NULL)
{
assert(capacity > 0);
_size = 0;
#ifdef NO_POSIX_MEMALIGN
_events = (MidiEvent *) malloc(sizeof(MidiEvent) * capacity);
_data = (RawMidi *) malloc(sizeof(RawMidi) * capacity * MAX_EVENT_SIZE);
#else
posix_memalign((void**)&_events, 16, sizeof(MidiEvent) * capacity);
posix_memalign((void**)&_data, 16, sizeof(RawMidi) * capacity * MAX_EVENT_SIZE);
#endif
assert(_data);
assert(_events);
silence(_capacity);
}
MidiBuffer::~MidiBuffer()
{
free(_events);
free(_data);
}
/** Read events from @a src starting at time @a offset into the START of this buffer, for
* time direction @a nframes. Relative time, where 0 = start of buffer.
*
* Note that offset and nframes refer to sample time, NOT buffer offsets or event counts.
*/
void
MidiBuffer::read_from(const Buffer& src, jack_nframes_t nframes, jack_nframes_t offset)
{
assert(src.type() == DataType::MIDI);
const MidiBuffer& msrc = (MidiBuffer&)src;
assert(_capacity >= src.size());
clear();
assert(_size == 0);
// FIXME: slow
for (size_t i=0; i < src.size(); ++i) {
const MidiEvent& ev = msrc[i];
if (ev.time >= offset && ev.time < offset+nframes) {
push_back(ev);
}
}
_silent = src.silent();
}
/** Push an event into the buffer.
*
* Note that the raw MIDI pointed to by ev will be COPIED and unmodified.
* That is, the caller still owns it, if it needs freeing it's Not My Problem(TM).
* Realtime safe.
* @return false if operation failed (not enough room)
*/
bool
MidiBuffer::push_back(const MidiEvent& ev)
{
if (_size == _capacity)
return false;
RawMidi* const write_loc = _data + (_size * MAX_EVENT_SIZE);
memcpy(write_loc, ev.buffer, ev.size);
_events[_size] = ev;
_events[_size].buffer = write_loc;
++_size;
//cerr << "MidiBuffer: pushed, size = " << _size << endl;
_silent = false;
return true;
}
void
MidiBuffer::silence(jack_nframes_t dur, jack_nframes_t offset)
{
// FIXME use parameters
assert(offset == 0);
//assert(dur == _capacity);
memset(_events, 0, sizeof(MidiEvent) * _capacity);
memset(_data, 0, sizeof(RawMidi) * _capacity * MAX_EVENT_SIZE);
_size = 0;
_silent = true;
}
} // namespace ARDOUR
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