/*
- Copyright (C) 2006-2007 Paul Davis
- Author: Dave Robillard
-
+ Copyright (C) 2006-2007 Paul Davis
+ Author: David Robillard
+
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 <iostream>
+
#include "pbd/malign.h"
+#include "pbd/compose.h"
+#include "pbd/debug.h"
+
+#include "ardour/debug.h"
#include "ardour/midi_buffer.h"
using namespace std;
using namespace ARDOUR;
+using namespace PBD;
// FIXME: mirroring for MIDI buffers?
MidiBuffer::MidiBuffer(size_t capacity)
silence(_capacity);
}
}
-
+
MidiBuffer::~MidiBuffer()
{
free(_data);
* Note that offset and nframes refer to sample time, NOT buffer offsets or event counts.
*/
void
-MidiBuffer::read_from (const Buffer& src, nframes_t nframes, nframes_t dst_offset, nframes_t src_offset)
+MidiBuffer::read_from (const Buffer& src, framecnt_t nframes, framecnt_t dst_offset, framecnt_t src_offset)
{
assert (src.type() == DataType::MIDI);
assert (&src != this);
const MidiBuffer& msrc = (MidiBuffer&) src;
-
+
assert (_capacity >= msrc.size());
if (dst_offset == 0) {
}
/* XXX use dst_offset somehow */
-
+
for (MidiBuffer::const_iterator i = msrc.begin(); i != msrc.end(); ++i) {
const Evoral::MIDIEvent<TimeType> ev(*i, false);
if (ev.time() >= src_offset && ev.time() < (nframes+src_offset)) {
push_back (ev);
+ } else {
+ cerr << "MIDI event @ " << ev.time() << " skipped, not within range "
+ << src_offset << " .. " << (nframes + src_offset) << endl;
}
}
}
void
-MidiBuffer::merge_from (const Buffer& src, nframes_t /*nframes*/, nframes_t /*dst_offset*/, nframes_t /*src_offset*/)
+MidiBuffer::merge_from (const Buffer& src, framecnt_t /*nframes*/, framecnt_t /*dst_offset*/, framecnt_t /*src_offset*/)
{
const MidiBuffer* mbuf = dynamic_cast<const MidiBuffer*>(&src);
assert (mbuf);
MidiBuffer::push_back(const Evoral::MIDIEvent<TimeType>& ev)
{
const size_t stamp_size = sizeof(TimeType);
- /*cerr << "MidiBuffer: pushing event @ " << ev.time()
- << " size = " << ev.size() << endl;*/
-
+
if (_size + stamp_size + ev.size() >= _capacity) {
cerr << "MidiBuffer::push_back failed (buffer is full)" << endl;
return false;
}
push_back(ev.time(), ev.size(), ev.buffer());
-
+
return true;
}
MidiBuffer::push_back(TimeType time, size_t size, const uint8_t* data)
{
const size_t stamp_size = sizeof(TimeType);
- /*cerr << "MidiBuffer: pushing event @ " << ev.time()
- << " size = " << ev.size() << endl;*/
-
+
+#ifndef NDEBUG
+ if (DEBUG::MidiIO & PBD::debug_bits) {
+ DEBUG_STR_DECL(a);
+ DEBUG_STR_APPEND(a, string_compose ("midibuffer %1 push event @ %2 sz %3 ", this, time, size));
+ for (size_t i=0; i < size; ++i) {
+ DEBUG_STR_APPEND(a,hex);
+ DEBUG_STR_APPEND(a,"0x");
+ DEBUG_STR_APPEND(a,(int)data[i]);
+ DEBUG_STR_APPEND(a,' ');
+ }
+ DEBUG_STR_APPEND(a,'\n');
+ DEBUG_TRACE (DEBUG::MidiIO, DEBUG_STR(a).str());
+ }
+#endif
+
if (_size + stamp_size + size >= _capacity) {
cerr << "MidiBuffer::push_back failed (buffer is full)" << endl;
return false;
_size += stamp_size + size;
_silent = false;
-
+
return true;
}
MidiBuffer::push_back(const jack_midi_event_t& ev)
{
const size_t stamp_size = sizeof(TimeType);
+
if (_size + stamp_size + ev.size >= _capacity) {
cerr << "MidiBuffer::push_back failed (buffer is full)" << endl;
return false;
}
-
+
if (!Evoral::midi_event_is_valid(ev.buffer, ev.size)) {
cerr << "WARNING: MidiBuffer ignoring illegal MIDI event" << endl;
return false;
}
+#ifndef NDEBUG
+ if (DEBUG::MidiIO & PBD::debug_bits) {
+ DEBUG_STR_DECL(a);
+ DEBUG_STR_APPEND(a, string_compose ("midibuffer %1 push jack event @ %2 sz %3 ", this, ev.time, ev.size));
+ for (size_t i=0; i < ev.size; ++i) {
+ DEBUG_STR_APPEND(a,hex);
+ DEBUG_STR_APPEND(a,"0x");
+ DEBUG_STR_APPEND(a,(int)ev.buffer[i]);
+ DEBUG_STR_APPEND(a,' ');
+ }
+ DEBUG_STR_APPEND(a,'\n');
+ DEBUG_TRACE (DEBUG::MidiIO, DEBUG_STR(a).str());
+ }
+#endif
+
uint8_t* const write_loc = _data + _size;
*((TimeType*)write_loc) = ev.time;
memcpy(write_loc + stamp_size, ev.buffer, ev.size);
_size += stamp_size + ev.size;
_silent = false;
-
+
return true;
}
// write timestamp
uint8_t* write_loc = _data + _size;
*((TimeType*)write_loc) = time;
-
+
// move write_loc to begin of MIDI buffer data to write to
write_loc += stamp_size;
_size += stamp_size + size;
_silent = false;
-
+
return write_loc;
}
void
-MidiBuffer::silence (nframes_t /*nframes*/, nframes_t /*offset*/)
+MidiBuffer::silence (framecnt_t /*nframes*/, framecnt_t /*offset*/)
{
/* XXX iterate over existing events, find all in range given by offset & nframes,
and delete them.
_silent = true;
}
+bool
+MidiBuffer::second_simultaneous_midi_byte_is_first (uint8_t a, uint8_t b)
+{
+ bool b_first = false;
+
+ /* two events at identical times. we need to determine
+ the order in which they should occur.
+
+ the rule is:
+
+ Controller messages
+ Program Change
+ Note Off
+ Note On
+ Note Pressure
+ Channel Pressure
+ Pitch Bend
+ */
+
+ if ((a) >= 0xf0 || (b) >= 0xf0 || ((a & 0xf) != (b & 0xf))) {
+
+ /* if either message is not a channel message, or if the channels are
+ * different, we don't care about the type.
+ */
+
+ b_first = true;
+
+ } else {
+
+ switch (b & 0xf0) {
+ case MIDI_CMD_CONTROL:
+ b_first = true;
+ break;
+
+ case MIDI_CMD_PGM_CHANGE:
+ switch (a & 0xf0) {
+ case MIDI_CMD_CONTROL:
+ break;
+ case MIDI_CMD_PGM_CHANGE:
+ case MIDI_CMD_NOTE_OFF:
+ case MIDI_CMD_NOTE_ON:
+ case MIDI_CMD_NOTE_PRESSURE:
+ case MIDI_CMD_CHANNEL_PRESSURE:
+ case MIDI_CMD_BENDER:
+ b_first = true;
+ }
+ break;
+
+ case MIDI_CMD_NOTE_OFF:
+ switch (a & 0xf0) {
+ case MIDI_CMD_CONTROL:
+ case MIDI_CMD_PGM_CHANGE:
+ break;
+ case MIDI_CMD_NOTE_OFF:
+ case MIDI_CMD_NOTE_ON:
+ case MIDI_CMD_NOTE_PRESSURE:
+ case MIDI_CMD_CHANNEL_PRESSURE:
+ case MIDI_CMD_BENDER:
+ b_first = true;
+ }
+ break;
+
+ case MIDI_CMD_NOTE_ON:
+ switch (a & 0xf0) {
+ case MIDI_CMD_CONTROL:
+ case MIDI_CMD_PGM_CHANGE:
+ case MIDI_CMD_NOTE_OFF:
+ break;
+ case MIDI_CMD_NOTE_ON:
+ case MIDI_CMD_NOTE_PRESSURE:
+ case MIDI_CMD_CHANNEL_PRESSURE:
+ case MIDI_CMD_BENDER:
+ b_first = true;
+ }
+ break;
+ case MIDI_CMD_NOTE_PRESSURE:
+ switch (a & 0xf0) {
+ case MIDI_CMD_CONTROL:
+ case MIDI_CMD_PGM_CHANGE:
+ case MIDI_CMD_NOTE_OFF:
+ case MIDI_CMD_NOTE_ON:
+ break;
+ case MIDI_CMD_NOTE_PRESSURE:
+ case MIDI_CMD_CHANNEL_PRESSURE:
+ case MIDI_CMD_BENDER:
+ b_first = true;
+ }
+ break;
+
+ case MIDI_CMD_CHANNEL_PRESSURE:
+ switch (a & 0xf0) {
+ case MIDI_CMD_CONTROL:
+ case MIDI_CMD_PGM_CHANGE:
+ case MIDI_CMD_NOTE_OFF:
+ case MIDI_CMD_NOTE_ON:
+ case MIDI_CMD_NOTE_PRESSURE:
+ break;
+ case MIDI_CMD_CHANNEL_PRESSURE:
+ case MIDI_CMD_BENDER:
+ b_first = true;
+ }
+ break;
+ case MIDI_CMD_BENDER:
+ switch (a & 0xf0) {
+ case MIDI_CMD_CONTROL:
+ case MIDI_CMD_PGM_CHANGE:
+ case MIDI_CMD_NOTE_OFF:
+ case MIDI_CMD_NOTE_ON:
+ case MIDI_CMD_NOTE_PRESSURE:
+ case MIDI_CMD_CHANNEL_PRESSURE:
+ break;
+ case MIDI_CMD_BENDER:
+ b_first = true;
+ }
+ break;
+ }
+ }
+
+ return b_first;
+}
+
/** Merge \a other into this buffer. Realtime safe. */
bool
-MidiBuffer::merge_in_place(const MidiBuffer &other)
+MidiBuffer::merge_in_place (const MidiBuffer &other)
{
+ if (other.size() && size()) {
+ DEBUG_TRACE (DEBUG::MidiIO, string_compose ("merge in place, sizes %1/%2\n", size(), other.size()));
+ }
+
if (other.size() == 0) {
return true;
}
- if (_size == 0) {
- copy(other);
+ if (size() == 0) {
+ copy (other);
return true;
}
- if (_size + other.size() > _capacity) {
- cerr << "MidiBuffer::merge failed (no space)" << endl;
+ if (size() + other.size() > _capacity) {
return false;
}
while (them != other.end()) {
- Evoral::MIDIEvent<TimeType> ev_other (*them);
- size_t sz = 0;
- size_t src;
+ size_t bytes_to_merge;
+ ssize_t merge_offset;
/* gather up total size of events that are earlier than
the event referenced by "us"
*/
- src = 0;
+ merge_offset = -1;
+ bytes_to_merge = 0;
- while (them != other.end() && ev_other.time() < (*us).time()) {
- if (!src) {
- src = them.offset;
+ while (them != other.end() && (*them).time() < (*us).time()) {
+ if (merge_offset == -1) {
+ merge_offset = them.offset;
}
- sz += sizeof (TimeType) + ev_other.size();
+ bytes_to_merge += sizeof (TimeType) + (*them).size();
++them;
}
- if (sz) {
+ /* "them" now points to either:
+ *
+ * 1) an event that has the same or later timestamp than the
+ * event pointed to by "us"
+ *
+ * OR
+ *
+ * 2) the end of the "other" buffer
+ *
+ * if "sz" is non-zero, there is data to be merged from "other"
+ * into this buffer before we do anything else, corresponding
+ * to the events from "other" that we skipped while advancing
+ * "them".
+ */
+
+ if (bytes_to_merge) {
+ assert(merge_offset >= 0);
/* move existing */
- memmove (_data + us.offset + sz, _data + us.offset , _size - us.offset);
+ memmove (_data + us.offset + bytes_to_merge, _data + us.offset, _size - us.offset);
/* increase _size */
- _size += sz;
+ _size += bytes_to_merge;
+ assert (_size <= _capacity);
/* insert new stuff */
- memcpy (_data + us.offset, other._data + src, sz);
+ memcpy (_data + us.offset, other._data + merge_offset, bytes_to_merge);
/* update iterator to our own events. this is a miserable hack */
- us.offset += sz;
- } else {
+ us.offset += bytes_to_merge;
+ }
+
+ /* if we're at the end of the other buffer, we're done */
+
+ if (them == other.end()) {
+ break;
+ }
+
+ /* if we have two messages messages with the same timestamp. we
+ * must order them correctly.
+ */
+
+ if ((*us).time() == (*them).time()) {
+
+ DEBUG_TRACE (DEBUG::MidiIO,
+ string_compose ("simultaneous MIDI events discovered during merge, times %1/%2 status %3/%4\n",
+ (*us).time(), (*them).time(),
+ (int) *(_data + us.offset + sizeof (TimeType)),
+ (int) *(other._data + them.offset + sizeof (TimeType))));
+
+ uint8_t our_midi_status_byte = *(_data + us.offset + sizeof (TimeType));
+ uint8_t their_midi_status_byte = *(other._data + them.offset + sizeof (TimeType));
+ bool them_first = second_simultaneous_midi_byte_is_first (our_midi_status_byte, their_midi_status_byte);
+
+ DEBUG_TRACE (DEBUG::MidiIO, string_compose ("other message came first ? %1\n", them_first));
+
+ if (!them_first) {
+ /* skip past our own event */
+ ++us;
+ }
+
+ bytes_to_merge = sizeof (TimeType) + (*them).size();
+
+ /* move our remaining events later in the buffer by
+ * enough to fit the one message we're going to merge
+ */
+
+ memmove (_data + us.offset + bytes_to_merge, _data + us.offset, _size - us.offset);
+ /* increase _size */
+ _size += bytes_to_merge;
+ assert(_size <= _capacity);
+ /* insert new stuff */
+ memcpy (_data + us.offset, other._data + them.offset, bytes_to_merge);
+ /* update iterator to our own events. this is a miserable hack */
+ us.offset += bytes_to_merge;
+ /* 'us' is now an iterator to the event right after the
+ new ones that we merged
+ */
+ if (them_first) {
+ /* need to skip the event pointed to by 'us'
+ since its at the same time as 'them'
+ (still), and we'll enter
+ */
+
+ if (us != end()) {
+ ++us;
+ }
+ }
+
+ /* we merged one event from the other buffer, so
+ * advance the iterator there.
+ */
+ ++them;
+
+ } else {
+
/* advance past our own events to get to the correct insertion
point for the next event(s) from "other"
*/
-
- while (us != end() && (*us).time() < ev_other.time()) {
+
+ while (us != end() && (*us).time() <= (*them).time()) {
++us;
}
}
- if (!(us != end())) {
- /* just append the rest of other */
- memcpy (_data + us.offset, other._data + them.offset, other._size - them.offset);
- break;
- }
- }
+ /* check to see if we reached the end of this buffer while
+ * looking for the insertion point.
+ */
- return true;
-}
+ if (us == end()) {
-/** Clear, and merge \a a and \a b into this buffer.
- *
- * \return true if complete merge was successful
- */
-bool
-MidiBuffer::merge(const MidiBuffer& a, const MidiBuffer& b)
-{
- _size = 0;
-
- if (this == &a) {
- merge_in_place(b);
+ /* just append the rest of other and we're done*/
+
+ memcpy (_data + us.offset, other._data + them.offset, other._size - them.offset);
+ _size += other._size - them.offset;
+ assert(_size <= _capacity);
+ break;
+ }
}
- if (this == &b) {
- merge_in_place(a);
- }
-
- cerr << "FIXME: MIDI BUFFER MERGE" << endl;
return true;
}
projects / ardour.git / blobdiff