2 Copyright (C) 2006-2007 Paul Davis
3 Author: David Robillard
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the Free
7 Software Foundation; either version 2 of the License, or (at your option)
10 This program is distributed in the hope that it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include "pbd/malign.h"
23 #include "pbd/compose.h"
24 #include "pbd/debug.h"
25 #include "pbd/stacktrace.h"
27 #include "ardour/debug.h"
28 #include "ardour/midi_buffer.h"
29 #include "ardour/port.h"
32 using namespace ARDOUR;
35 // FIXME: mirroring for MIDI buffers?
36 MidiBuffer::MidiBuffer(size_t capacity)
37 : Buffer (DataType::MIDI)
47 MidiBuffer::~MidiBuffer()
49 cache_aligned_free(_data);
53 MidiBuffer::resize(size_t size)
55 if (_data && size < _capacity) {
65 cache_aligned_free (_data);
67 cache_aligned_malloc ((void**) &_data, size);
76 MidiBuffer::copy(const MidiBuffer& copy)
78 assert(_capacity >= copy._size);
80 memcpy(_data, copy._data, copy._size);
84 MidiBuffer::copy(MidiBuffer const * const copy)
86 assert(_capacity >= copy->size ());
87 _size = copy->size ();
88 memcpy(_data, copy->data(), _size);
92 /** Read events from @a src starting at time @a offset into the START of this buffer, for
93 * time duration @a nframes. Relative time, where 0 = start of buffer.
95 * Note that offset and nframes refer to sample time, NOT buffer offsets or event counts.
98 MidiBuffer::read_from (const Buffer& src, framecnt_t nframes, framecnt_t dst_offset, framecnt_t /* src_offset*/)
100 assert (src.type() == DataType::MIDI);
101 assert (&src != this);
103 const MidiBuffer& msrc = (const MidiBuffer&) src;
105 assert (_capacity >= msrc.size());
107 if (dst_offset == 0) {
112 framecnt_t offset = Port::port_offset();
114 for (MidiBuffer::const_iterator i = msrc.begin(); i != msrc.end(); ++i) {
115 const Evoral::MIDIEvent<TimeType> ev(*i, false);
116 if (ev.time() >= offset && ev.time() < (nframes + offset)) {
119 cerr << "MIDI event @ " << ev.time() << " skipped, not within range "
120 << offset << " .. " << (nframes + offset) << ":";
121 for (size_t xx = 0; xx < ev.size(); ++xx) {
122 cerr << ' ' << hex << (int) ev.buffer()[xx];
128 _silent = src.silent();
132 MidiBuffer::merge_from (const Buffer& src, framecnt_t /*nframes*/, framecnt_t /*dst_offset*/, framecnt_t /*src_offset*/)
134 const MidiBuffer* mbuf = dynamic_cast<const MidiBuffer*>(&src);
136 assert (mbuf != this);
138 /* XXX use nframes, and possible offsets */
139 merge_in_place (*mbuf);
142 /** Push an event into the buffer.
144 * Note that the raw MIDI pointed to by ev will be COPIED and unmodified.
145 * That is, the caller still owns it, if it needs freeing it's Not My Problem(TM).
147 * @return false if operation failed (not enough room)
150 MidiBuffer::push_back(const Evoral::MIDIEvent<TimeType>& ev)
152 return push_back (ev.time(), ev.size(), ev.buffer());
156 /** Push MIDI data into the buffer.
158 * Note that the raw MIDI pointed to by @param data will be COPIED and unmodified.
159 * That is, the caller still owns it, if it needs freeing it's Not My Problem(TM).
161 * @return false if operation failed (not enough room)
164 MidiBuffer::push_back(TimeType time, size_t size, const uint8_t* data)
166 const size_t stamp_size = sizeof(TimeType);
169 if (DEBUG_ENABLED(DEBUG::MidiIO)) {
171 DEBUG_STR_APPEND(a, string_compose ("midibuffer %1 push event @ %2 sz %3 ", this, time, size));
172 for (size_t i=0; i < size; ++i) {
173 DEBUG_STR_APPEND(a,hex);
174 DEBUG_STR_APPEND(a,"0x");
175 DEBUG_STR_APPEND(a,(int)data[i]);
176 DEBUG_STR_APPEND(a,' ');
178 DEBUG_STR_APPEND(a,'\n');
179 DEBUG_TRACE (DEBUG::MidiIO, DEBUG_STR(a).str());
183 if (_size + stamp_size + size >= _capacity) {
187 if (!Evoral::midi_event_is_valid(data, size)) {
191 uint8_t* const write_loc = _data + _size;
192 *(reinterpret_cast<TimeType*>((uintptr_t)write_loc)) = time;
193 memcpy(write_loc + stamp_size, data, size);
195 _size += stamp_size + size;
202 MidiBuffer::insert_event(const Evoral::MIDIEvent<TimeType>& ev)
205 return push_back(ev);
208 const size_t stamp_size = sizeof(TimeType);
209 const size_t bytes_to_merge = stamp_size + ev.size();
211 if (_size + bytes_to_merge >= _capacity) {
212 cerr << "MidiBuffer::push_back failed (buffer is full)" << endl;
213 PBD::stacktrace (cerr, 20);
217 TimeType t = ev.time();
219 ssize_t insert_offset = -1;
220 for (MidiBuffer::iterator m = begin(); m != end(); ++m) {
221 if ((*m).time() < t) {
224 if ((*m).time() == t) {
225 const uint8_t our_midi_status_byte = *(_data + m.offset + sizeof (TimeType));
226 if (second_simultaneous_midi_byte_is_first (ev.type(), our_midi_status_byte)) {
230 insert_offset = m.offset;
233 if (insert_offset == -1) {
234 return push_back(ev);
237 // don't use memmove - it may use malloc(!)
238 // memmove (_data + insert_offset + bytes_to_merge, _data + insert_offset, _size - insert_offset);
239 for (ssize_t a = _size + bytes_to_merge - 1, b = _size - 1; b >= insert_offset; --b, --a) {
243 uint8_t* const write_loc = _data + insert_offset;
244 *(reinterpret_cast<TimeType*>((uintptr_t)write_loc)) = t;
245 memcpy(write_loc + stamp_size, ev.buffer(), ev.size());
247 _size += bytes_to_merge;
253 MidiBuffer::write(TimeType time, Evoral::EventType type, uint32_t size, const uint8_t* buf)
255 insert_event(Evoral::MIDIEvent<TimeType>(type, time, size, const_cast<uint8_t*>(buf)));
259 /** Reserve space for a new event in the buffer.
261 * This call is for copying MIDI directly into the buffer, the data location
262 * (of sufficient size to write \a size bytes) is returned, or 0 on failure.
263 * This call MUST be immediately followed by a write to the returned data
264 * location, or the buffer will be corrupted and very nasty things will happen.
267 MidiBuffer::reserve(TimeType time, size_t size)
269 const size_t stamp_size = sizeof(TimeType);
270 if (_size + stamp_size + size >= _capacity) {
275 uint8_t* write_loc = _data + _size;
276 *(reinterpret_cast<TimeType*>((uintptr_t)write_loc)) = time;
278 // move write_loc to begin of MIDI buffer data to write to
279 write_loc += stamp_size;
281 _size += stamp_size + size;
289 MidiBuffer::silence (framecnt_t /*nframes*/, framecnt_t /*offset*/)
291 /* XXX iterate over existing events, find all in range given by offset & nframes,
300 MidiBuffer::second_simultaneous_midi_byte_is_first (uint8_t a, uint8_t b)
302 bool b_first = false;
304 /* two events at identical times. we need to determine
305 the order in which they should occur.
318 if ((a) >= 0xf0 || (b) >= 0xf0 || ((a & 0xf) != (b & 0xf))) {
320 /* if either message is not a channel message, or if the channels are
321 * different, we don't care about the type.
329 case MIDI_CMD_CONTROL:
333 case MIDI_CMD_PGM_CHANGE:
335 case MIDI_CMD_CONTROL:
337 case MIDI_CMD_PGM_CHANGE:
338 case MIDI_CMD_NOTE_OFF:
339 case MIDI_CMD_NOTE_ON:
340 case MIDI_CMD_NOTE_PRESSURE:
341 case MIDI_CMD_CHANNEL_PRESSURE:
342 case MIDI_CMD_BENDER:
347 case MIDI_CMD_NOTE_OFF:
349 case MIDI_CMD_CONTROL:
350 case MIDI_CMD_PGM_CHANGE:
352 case MIDI_CMD_NOTE_OFF:
353 case MIDI_CMD_NOTE_ON:
354 case MIDI_CMD_NOTE_PRESSURE:
355 case MIDI_CMD_CHANNEL_PRESSURE:
356 case MIDI_CMD_BENDER:
361 case MIDI_CMD_NOTE_ON:
363 case MIDI_CMD_CONTROL:
364 case MIDI_CMD_PGM_CHANGE:
365 case MIDI_CMD_NOTE_OFF:
367 case MIDI_CMD_NOTE_ON:
368 case MIDI_CMD_NOTE_PRESSURE:
369 case MIDI_CMD_CHANNEL_PRESSURE:
370 case MIDI_CMD_BENDER:
374 case MIDI_CMD_NOTE_PRESSURE:
376 case MIDI_CMD_CONTROL:
377 case MIDI_CMD_PGM_CHANGE:
378 case MIDI_CMD_NOTE_OFF:
379 case MIDI_CMD_NOTE_ON:
381 case MIDI_CMD_NOTE_PRESSURE:
382 case MIDI_CMD_CHANNEL_PRESSURE:
383 case MIDI_CMD_BENDER:
388 case MIDI_CMD_CHANNEL_PRESSURE:
390 case MIDI_CMD_CONTROL:
391 case MIDI_CMD_PGM_CHANGE:
392 case MIDI_CMD_NOTE_OFF:
393 case MIDI_CMD_NOTE_ON:
394 case MIDI_CMD_NOTE_PRESSURE:
396 case MIDI_CMD_CHANNEL_PRESSURE:
397 case MIDI_CMD_BENDER:
401 case MIDI_CMD_BENDER:
403 case MIDI_CMD_CONTROL:
404 case MIDI_CMD_PGM_CHANGE:
405 case MIDI_CMD_NOTE_OFF:
406 case MIDI_CMD_NOTE_ON:
407 case MIDI_CMD_NOTE_PRESSURE:
408 case MIDI_CMD_CHANNEL_PRESSURE:
410 case MIDI_CMD_BENDER:
420 /** Merge \a other into this buffer. Realtime safe. */
422 MidiBuffer::merge_in_place (const MidiBuffer &other)
424 if (other.size() && size()) {
425 DEBUG_TRACE (DEBUG::MidiIO, string_compose ("merge in place, sizes %1/%2\n", size(), other.size()));
428 if (other.size() == 0) {
437 if (size() + other.size() > _capacity) {
441 const_iterator them = other.begin();
442 iterator us = begin();
444 while (them != other.end()) {
446 size_t bytes_to_merge;
447 ssize_t merge_offset;
449 /* gather up total size of events that are earlier than
450 the event referenced by "us"
456 while (them != other.end() && (*them).time() < (*us).time()) {
457 if (merge_offset == -1) {
458 merge_offset = them.offset;
460 bytes_to_merge += sizeof (TimeType) + (*them).size();
464 /* "them" now points to either:
466 * 1) an event that has the same or later timestamp than the
467 * event pointed to by "us"
471 * 2) the end of the "other" buffer
473 * if "sz" is non-zero, there is data to be merged from "other"
474 * into this buffer before we do anything else, corresponding
475 * to the events from "other" that we skipped while advancing
479 if (bytes_to_merge) {
480 assert(merge_offset >= 0);
482 memmove (_data + us.offset + bytes_to_merge, _data + us.offset, _size - us.offset);
484 _size += bytes_to_merge;
485 assert (_size <= _capacity);
486 /* insert new stuff */
487 memcpy (_data + us.offset, other._data + merge_offset, bytes_to_merge);
488 /* update iterator to our own events. this is a miserable hack */
489 us.offset += bytes_to_merge;
492 /* if we're at the end of the other buffer, we're done */
494 if (them == other.end()) {
498 /* if we have two messages messages with the same timestamp. we
499 * must order them correctly.
502 if ((*us).time() == (*them).time()) {
504 DEBUG_TRACE (DEBUG::MidiIO,
505 string_compose ("simultaneous MIDI events discovered during merge, times %1/%2 status %3/%4\n",
506 (*us).time(), (*them).time(),
507 (int) *(_data + us.offset + sizeof (TimeType)),
508 (int) *(other._data + them.offset + sizeof (TimeType))));
510 uint8_t our_midi_status_byte = *(_data + us.offset + sizeof (TimeType));
511 uint8_t their_midi_status_byte = *(other._data + them.offset + sizeof (TimeType));
512 bool them_first = second_simultaneous_midi_byte_is_first (our_midi_status_byte, their_midi_status_byte);
514 DEBUG_TRACE (DEBUG::MidiIO, string_compose ("other message came first ? %1\n", them_first));
517 /* skip past our own event */
521 bytes_to_merge = sizeof (TimeType) + (*them).size();
523 /* move our remaining events later in the buffer by
524 * enough to fit the one message we're going to merge
527 memmove (_data + us.offset + bytes_to_merge, _data + us.offset, _size - us.offset);
529 _size += bytes_to_merge;
530 assert(_size <= _capacity);
531 /* insert new stuff */
532 memcpy (_data + us.offset, other._data + them.offset, bytes_to_merge);
533 /* update iterator to our own events. this is a miserable hack */
534 us.offset += bytes_to_merge;
535 /* 'us' is now an iterator to the event right after the
536 new ones that we merged
539 /* need to skip the event pointed to by 'us'
540 since its at the same time as 'them'
541 (still), and we'll enter
549 /* we merged one event from the other buffer, so
550 * advance the iterator there.
557 /* advance past our own events to get to the correct insertion
558 point for the next event(s) from "other"
561 while (us != end() && (*us).time() <= (*them).time()) {
566 /* check to see if we reached the end of this buffer while
567 * looking for the insertion point.
572 /* just append the rest of other and we're done*/
574 memcpy (_data + us.offset, other._data + them.offset, other._size - them.offset);
575 _size += other._size - them.offset;
576 assert(_size <= _capacity);