/*
- 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 <ardour/midi_buffer.h>
-#ifdef __x86_64__
-static const int CPU_CACHE_ALIGN = 64;
-#else
-static const int CPU_CACHE_ALIGN = 16; /* arguably 32 on most arches, but it matters less */
-#endif
+#include "pbd/malign.h"
+#include "pbd/compose.h"
+#include "pbd/debug.h"
-using namespace std;
-
-namespace ARDOUR {
+#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)
: Buffer(DataType::MIDI, capacity)
-// , _owns_data(true)
- , _events(NULL)
- , _data(NULL)
+ , _data(0)
{
- assert(capacity > 0);
-
- _size = 0;
+ if (capacity) {
+ resize(_capacity);
+ silence(_capacity);
+ }
+}
-#ifdef NO_POSIX_MEMALIGN
- _events = (MidiEvent *) malloc(sizeof(MidiEvent) * capacity);
- _data = (Byte *) malloc(sizeof(Byte) * capacity * MAX_EVENT_SIZE);
-#else
- posix_memalign((void**)&_events, CPU_CACHE_ALIGN, sizeof(MidiEvent) * capacity);
- posix_memalign((void**)&_data, CPU_CACHE_ALIGN, sizeof(Byte) * capacity * MAX_EVENT_SIZE);
-#endif
- assert(_data);
- assert(_events);
- silence(_capacity);
+MidiBuffer::~MidiBuffer()
+{
+ free(_data);
}
void
-MidiBuffer::copy(const MidiBuffer& copy)
+MidiBuffer::resize(size_t size)
{
- assert(_capacity >= copy._capacity);
+ assert(size > 0);
+
+ if (size < _capacity) {
+ return;
+ }
+
+ free(_data);
+
_size = 0;
+ _capacity = size;
+ cache_aligned_malloc ((void**) &_data, _capacity);
- for (size_t i=0; i < copy.size(); ++i)
- push_back(copy[i]);
+ assert(_data);
}
-MidiBuffer::~MidiBuffer()
+void
+MidiBuffer::copy(const MidiBuffer& copy)
{
- free(_events);
- free(_data);
+ assert(_capacity >= copy._size);
+ _size = copy._size;
+ memcpy(_data, copy._data, copy._size);
}
/** 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.
+ * time duration @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, nframes_t nframes, nframes_t offset)
+MidiBuffer::read_from (const Buffer& src, framecnt_t nframes, framecnt_t dst_offset, framecnt_t src_offset)
{
- assert(src.type() == DataType::MIDI);
- const MidiBuffer& msrc = (MidiBuffer&)src;
+ assert (src.type() == DataType::MIDI);
+ assert (&src != this);
+
+ const MidiBuffer& msrc = (MidiBuffer&) src;
- assert(_capacity >= src.size());
+ assert (_capacity >= msrc.size());
- clear();
- assert(_size == 0);
+ if (dst_offset == 0) {
+ clear ();
+ assert (_size == 0);
+ }
+
+ /* XXX use dst_offset somehow */
- // FIXME: slow
- for (size_t i=0; i < src.size(); ++i) {
- const MidiEvent& ev = msrc[i];
- if (ev.time() >= offset && ev.time() < offset+nframes) {
- //cerr << "MidiBuffer::read_from got event, " << ev.time() << endl;
- push_back(ev);
+ 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 << "MidiBuffer event out of range, " << ev.time() << endl;
+ cerr << "MIDI event @ " << ev.time() << " skipped, not within range "
+ << src_offset << " .. " << (nframes + src_offset) << endl;
}
}
_silent = src.silent();
}
+void
+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);
+ assert (mbuf != this);
+
+ /* XXX use nframes, and possible offsets */
+ merge_in_place (*mbuf);
+}
/** Push an event into the buffer.
*
* @return false if operation failed (not enough room)
*/
bool
-MidiBuffer::push_back(const MidiEvent& ev)
+MidiBuffer::push_back(const Evoral::MIDIEvent<TimeType>& ev)
{
- if (_size == _capacity)
+ 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;
+ }
+
+ if (!Evoral::midi_event_is_valid(ev.buffer(), ev.size())) {
+ cerr << "WARNING: MidiBuffer ignoring illegal MIDI event" << endl;
+ return false;
+ }
- Byte* const write_loc = _data + (_size * MAX_EVENT_SIZE);
+ push_back(ev.time(), ev.size(), ev.buffer());
+
+ return true;
+}
+
+
+/** Push an event into the buffer.
+ * @return false if operation failed (not enough room)
+ */
+bool
+MidiBuffer::push_back(TimeType time, size_t size, const uint8_t* data)
+{
+ const size_t stamp_size = sizeof(TimeType);
+
+#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;
+ }
- memcpy(write_loc, ev.buffer(), ev.size());
- _events[_size] = ev;
- _events[_size].set_buffer(write_loc, false);
- ++_size;
+ if (!Evoral::midi_event_is_valid(data, size)) {
+ cerr << "WARNING: MidiBuffer ignoring illegal MIDI event" << endl;
+ return false;
+ }
- //cerr << "MidiBuffer: pushed, size = " << _size << endl;
+ uint8_t* const write_loc = _data + _size;
+ *((TimeType*)write_loc) = time;
+ memcpy(write_loc + stamp_size, data, size);
+ _size += stamp_size + size;
_silent = false;
return true;
bool
MidiBuffer::push_back(const jack_midi_event_t& ev)
{
- if (_size == _capacity)
+ 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;
+ }
- Byte* const write_loc = _data + (_size * MAX_EVENT_SIZE);
-
- memcpy(write_loc, ev.buffer, ev.size);
- _events[_size].time() = (double)ev.time;
- _events[_size].size() = ev.size;
- _events[_size].set_buffer(write_loc, false);
- ++_size;
+ if (!Evoral::midi_event_is_valid(ev.buffer, ev.size)) {
+ cerr << "WARNING: MidiBuffer ignoring illegal MIDI event" << endl;
+ return false;
+ }
- //cerr << "MidiBuffer: pushed, size = " << _size << endl;
+ 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;
/** Reserve space for a new event in the buffer.
*
* This call is for copying MIDI directly into the buffer, the data location
- * (of sufficient size to write \a size bytes) is returned, or NULL on failure.
+ * (of sufficient size to write \a size bytes) is returned, or 0 on failure.
* This call MUST be immediately followed by a write to the returned data
* location, or the buffer will be corrupted and very nasty things will happen.
*/
-Byte*
-MidiBuffer::reserve(double time, size_t size)
+uint8_t*
+MidiBuffer::reserve(TimeType time, size_t size)
{
- assert(size <= MAX_EVENT_SIZE);
-
- if (_size == _capacity)
- return NULL;
-
- Byte* const write_loc = _data + (_size * MAX_EVENT_SIZE);
+ const size_t stamp_size = sizeof(TimeType);
+ if (_size + stamp_size + size >= _capacity) {
+ return 0;
+ }
- _events[_size].time() = time;
- _events[_size].size() = size;
- _events[_size].set_buffer(write_loc, false);
- ++_size;
+ // write timestamp
+ uint8_t* write_loc = _data + _size;
+ *((TimeType*)write_loc) = time;
- //cerr << "MidiBuffer: reserved, size = " << _size << endl;
+ // 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 dur, nframes_t offset)
+MidiBuffer::silence (framecnt_t /*nframes*/, framecnt_t /*offset*/)
{
- // FIXME use parameters
- if (offset != 0)
- cerr << "WARNING: MidiBuffer::silence w/ offset != 0 (not implemented)" << endl;
+ /* XXX iterate over existing events, find all in range given by offset & nframes,
+ and delete them.
+ */
- memset(_events, 0, sizeof(MidiEvent) * _capacity);
- memset(_data, 0, sizeof(Byte) * _capacity * MAX_EVENT_SIZE);
_size = 0;
_silent = true;
}
+/** Merge \a other into this buffer. Realtime safe. */
+bool
+MidiBuffer::merge_in_place(const MidiBuffer &other)
+{
+ if (other.size() == 0) {
+ return true;
+ }
+
+ if (_size == 0) {
+ copy(other);
+ return true;
+ }
+
+ if (_size + other.size() > _capacity) {
+ cerr << "MidiBuffer::merge failed (no space)" << endl;
+ return false;
+ }
+
+#ifndef NDEBUG
+ size_t test_orig_us_size = _size;
+ size_t test_orig_them_size = other._size;
+ TimeType test_time = 0;
+ size_t test_us_count = 0;
+ size_t test_them_count = 0;
+ for (iterator i = begin(); i != end(); ++i) {
+ assert(Evoral::midi_event_is_valid((*i).buffer(), (*i).size()));
+ assert((*i).time() >= test_time);
+ test_time = (*i).time();
+ ++test_us_count;
+ }
+ test_time = 0;
+ for (const_iterator i = other.begin(); i != other.end(); ++i) {
+ assert(Evoral::midi_event_is_valid((*i).buffer(), (*i).size()));
+ assert((*i).time() >= test_time);
+ test_time = (*i).time();
+ ++test_them_count;
+ }
+#endif
+
+ const_iterator them = other.begin();
+ iterator us = begin();
+
+ while (them != other.end()) {
+
+ size_t sz = 0;
+ ssize_t src = -1;
+
+ /* gather up total size of events that are earlier than
+ the event referenced by "us"
+ */
+
+ while (them != other.end() && (*them).time() <= (*us).time()) {
+ if (src == -1) {
+ src = them.offset;
+ }
+ sz += sizeof (TimeType) + (*them).size();
+ ++them;
+ }
+
+#if 0
+ if (us != end())
+ cerr << "us @ " << (*us).time() << endl;
+ if (them != other.end())
+ cerr << "them @ " << (*them).time() << endl;
+#endif
+
+ if (sz) {
+ assert(src >= 0);
+ /* move existing */
+ memmove (_data + us.offset + sz, _data + us.offset, _size - us.offset);
+ /* increase _size */
+ _size += sz;
+ assert(_size <= _capacity);
+ /* insert new stuff */
+ memcpy (_data + us.offset, other._data + src, sz);
+ /* update iterator to our own events. this is a miserable hack */
+ us.offset += sz;
+ } 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() < (*them).time()) {
+ ++us;
+ }
+ }
+
+ if (!(us != end())) {
+ /* just append the rest of other */
+ memcpy (_data + us.offset, other._data + them.offset, other._size - them.offset);
+ _size += other._size - them.offset;
+ break;
+ }
+ }
+
+#ifndef NDEBUG
+ assert(_size == test_orig_us_size + test_orig_them_size);
+ size_t test_final_count = 0;
+ test_time = 0;
+ for (iterator i = begin(); i != end(); ++i) {
+ // cerr << "CHECK " << test_final_count << " / " << test_us_count + test_them_count << endl;
+ assert(Evoral::midi_event_is_valid((*i).buffer(), (*i).size()));
+ assert((*i).time() >= test_time);
+ test_time = (*i).time();
+ ++test_final_count;
+ }
+ assert(test_final_count = test_us_count + test_them_count);
+#endif
+
+ return true;
+}
/** Clear, and merge \a a and \a b into this buffer.
- *
- * FIXME: This is slow.
*
* \return true if complete merge was successful
*/
{
_size = 0;
- // Die if a merge isn't necessary as it's expensive
- assert(a.size() > 0 && b.size() > 0);
+ if (this == &a) {
+ return merge_in_place(b);
+ } else if (this == &b) {
+ return merge_in_place(a);
+ }
- size_t a_index = 0;
- size_t b_index = 0;
- size_t count = a.size() + b.size();
+ const_iterator ai = a.begin();
+ const_iterator bi = b.begin();
- while (count > 0 && a_index < a.size() && b_index < b.size()) {
-
- if (size() == capacity()) {
- cerr << "WARNING: MIDI buffer overrun, events lost!" << endl;
- return false;
- }
-
- if (a_index == a.size()) {
- push_back(a[a_index]);
- ++a_index;
- } else if (b_index == b.size()) {
- push_back(b[b_index]);
- ++b_index;
+ resize(a.size() + b.size());
+ while (ai != a.end() && bi != b.end()) {
+ if ((*ai).time() < (*bi).time()) {
+ memcpy(_data + _size, (*ai).buffer(), (*ai).size());
+ _size += (*ai).size();
+ ++ai;
} else {
- const MidiEvent& a_ev = a[a_index];
- const MidiEvent& b_ev = b[b_index];
-
- if (a_ev.time() <= b_ev.time()) {
- push_back(a_ev);
- ++a_index;
- } else {
- push_back(b_ev);
- ++b_index;
- }
+ memcpy(_data + _size, (*bi).buffer(), (*bi).size());
+ _size += (*bi).size();
+ ++bi;
}
+ }
+
+ while (ai != a.end()) {
+ memcpy(_data + _size, (*ai).buffer(), (*ai).size());
+ _size += (*ai).size();
+ ++ai;
+ }
- --count;
+ while (bi != b.end()) {
+ memcpy(_data + _size, (*bi).buffer(), (*bi).size());
+ _size += (*bi).size();
+ ++bi;
}
return true;
}
-
-} // namespace ARDOUR
-
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