rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 363 insertions, 0 deletions

diff --git a/libs/ardour/midi_region.cc b/libs/ardour/midi_region.cc
new file mode 100644
index 0000000000..e29fb1e659
--- /dev/null
+++ b/libs/ardour/midi_region.cc
@@ -0,0 +1,363 @@
+/*
+    Copyright (C) 2000-2006 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.
+
+    $Id: midiregion.cc 746 2006-08-02 02:44:23Z drobilla $
+*/
+
+#include <cmath>
+#include <climits>
+#include <cfloat>
+
+#include <set>
+
+#include <sigc++/bind.h>
+#include <sigc++/class_slot.h>
+
+#include <glibmm/thread.h>
+
+#include <pbd/basename.h>
+#include <pbd/xml++.h>
+#include <pbd/enumwriter.h>
+
+#include <ardour/midi_region.h>
+#include <ardour/session.h>
+#include <ardour/gain.h>
+#include <ardour/dB.h>
+#include <ardour/playlist.h>
+#include <ardour/midi_source.h>
+#include <ardour/types.h>
+#include <ardour/midi_ring_buffer.h>
+
+#include "i18n.h"
+#include <locale.h>
+
+using namespace std;
+using namespace ARDOUR;
+
+/** Basic MidiRegion constructor (one channel) */
+MidiRegion::MidiRegion (boost::shared_ptr<MidiSource> src, nframes_t start, nframes_t length)
+	: Region (src, start, length, PBD::basename_nosuffix(src->name()), DataType::MIDI, 0,  Region::Flag(Region::DefaultFlags|Region::External))
+{
+	assert(_name.find("/") == string::npos);
+	midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+}
+
+/* Basic MidiRegion constructor (one channel) */
+MidiRegion::MidiRegion (boost::shared_ptr<MidiSource> src, nframes_t start, nframes_t length, const string& name, layer_t layer, Flag flags)
+	: Region (src, start, length, name, DataType::MIDI, layer, flags)
+{
+	assert(_name.find("/") == string::npos);
+	midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+}
+
+/* Basic MidiRegion constructor (many channels) */
+MidiRegion::MidiRegion (const SourceList& srcs, nframes_t start, nframes_t length, const string& name, layer_t layer, Flag flags)
+	: Region (srcs, start, length, name, DataType::MIDI, layer, flags)
+{
+	assert(_name.find("/") == string::npos);
+	midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+}
+
+
+/** Create a new MidiRegion, that is part of an existing one */
+MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other, nframes_t offset, nframes_t length, const string& name, layer_t layer, Flag flags)
+	: Region (other, offset, length, name, layer, flags)
+{
+	assert(_name.find("/") == string::npos);
+	midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+}
+
+MidiRegion::MidiRegion (boost::shared_ptr<const MidiRegion> other)
+	: Region (other)
+{
+	assert(_name.find("/") == string::npos);
+	midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+}
+
+MidiRegion::MidiRegion (boost::shared_ptr<MidiSource> src, const XMLNode& node)
+	: Region (src, node)
+{
+	if (set_state (node)) {
+		throw failed_constructor();
+	}
+
+	midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+	assert(_name.find("/") == string::npos);
+	assert(_type == DataType::MIDI);
+}
+
+MidiRegion::MidiRegion (const SourceList& srcs, const XMLNode& node)
+	: Region (srcs, node)
+{
+	if (set_state (node)) {
+		throw failed_constructor();
+	}
+
+	midi_source(0)->Switched.connect(sigc::mem_fun(this, &MidiRegion::switch_source));
+	assert(_name.find("/") == string::npos);
+	assert(_type == DataType::MIDI);
+}
+
+MidiRegion::~MidiRegion ()
+{
+}
+
+nframes_t
+MidiRegion::read_at (MidiRingBuffer& out, nframes_t position, nframes_t dur, uint32_t chan_n, NoteMode mode) const
+{
+	return _read_at (_sources, out, position, dur, chan_n, mode);
+}
+
+nframes_t
+MidiRegion::master_read_at (MidiRingBuffer& out, nframes_t position, nframes_t dur, uint32_t chan_n, NoteMode mode) const
+{
+	return _read_at (_master_sources, out, position, dur, chan_n, mode);
+}
+
+nframes_t
+MidiRegion::_read_at (const SourceList& srcs, MidiRingBuffer& dst, nframes_t position, nframes_t dur, uint32_t chan_n, NoteMode mode) const
+{
+	/*cerr << "MidiRegion " << _name << "._read_at(" << position << ") - "
+		<< position << " duration: " << dur << endl;*/
+
+	nframes_t internal_offset = 0;
+	nframes_t src_offset      = 0;
+	nframes_t to_read         = 0;
+	
+	/* precondition: caller has verified that we cover the desired section */
+
+	assert(chan_n == 0);
+	
+	if (position < _position) {
+		internal_offset = 0;
+		src_offset = _position - position;
+		dur -= src_offset;
+	} else {
+		internal_offset = position - _position;
+		src_offset = 0;
+	}
+
+	if (internal_offset >= _length) {
+		return 0; /* read nothing */
+	}
+	
+
+	if ((to_read = min (dur, _length - internal_offset)) == 0) {
+		return 0; /* read nothing */
+	}
+
+	// FIXME: non-opaque MIDI regions not yet supported
+	assert(opaque());
+
+	if (muted()) {
+		return 0; /* read nothing */
+	}
+
+	_read_data_count = 0;
+
+	boost::shared_ptr<MidiSource> src = midi_source(chan_n);
+	src->set_note_mode(mode);
+
+	nframes_t output_buffer_position = 0;
+	nframes_t negative_output_buffer_position = 0;
+	if (_position >= _start) {
+		// handle resizing of beginnings of regions correctly
+		output_buffer_position = _position - _start;
+	} else {
+		// when _start is greater than _position, we have to subtract
+		// _start from the note times in the midi source
+		negative_output_buffer_position = _start; 
+	}
+	
+	if (src->midi_read (
+			// the destination buffer
+			dst,  
+			// where to start reading in the region
+			_start + internal_offset, 
+			// how many bytes
+			to_read, 
+			// the offset in the output buffer
+			output_buffer_position,
+			// what to substract from note times written in the output buffer
+			negative_output_buffer_position
+		) != to_read) {
+		return 0; /* "read nothing" */
+	}
+
+	_read_data_count += src->read_data_count();
+
+	return to_read;
+}
+	
+XMLNode&
+MidiRegion::state (bool full)
+{
+	XMLNode& node (Region::state (full));
+	char buf[64];
+	char buf2[64];
+	LocaleGuard lg (X_("POSIX"));
+	
+	node.add_property ("flags", enum_2_string (_flags));
+
+	// XXX these should move into Region
+	
+	for (uint32_t n=0; n < _sources.size(); ++n) {
+		snprintf (buf2, sizeof(buf2), "source-%d", n);
+		_sources[n]->id().print (buf, sizeof(buf));
+		node.add_property (buf2, buf);
+	}
+
+	for (uint32_t n=0; n < _master_sources.size(); ++n) {
+		snprintf (buf2, sizeof(buf2), "master-source-%d", n);
+		_master_sources[n]->id().print (buf, sizeof (buf));
+		node.add_property (buf2, buf);
+	}
+
+	if (full && _extra_xml) {
+		node.add_child_copy (*_extra_xml);
+	}
+
+	return node;
+}
+
+int
+MidiRegion::set_live_state (const XMLNode& node, Change& what_changed, bool send)
+{
+	const XMLProperty *prop;
+	LocaleGuard lg (X_("POSIX"));
+
+	Region::set_live_state (node, what_changed, false);
+
+	uint32_t old_flags = _flags;
+		
+	if ((prop = node.property ("flags")) != 0) {
+		_flags = Flag (string_2_enum (prop->value(), _flags));
+
+		//_flags = Flag (strtol (prop->value().c_str(), (char **) 0, 16));
+
+		_flags = Flag (_flags & ~Region::LeftOfSplit);
+		_flags = Flag (_flags & ~Region::RightOfSplit);
+	}
+
+	if ((old_flags ^ _flags) & Muted) {
+		what_changed = Change (what_changed|MuteChanged);
+	}
+	if ((old_flags ^ _flags) & Opaque) {
+		what_changed = Change (what_changed|OpacityChanged);
+	}
+	if ((old_flags ^ _flags) & Locked) {
+		what_changed = Change (what_changed|LockChanged);
+	}
+
+	if (send) {
+		send_change (what_changed);
+	}
+
+	return 0;
+}
+
+int
+MidiRegion::set_state (const XMLNode& node)
+{
+	/* Region::set_state() calls the virtual set_live_state(),
+	   which will get us back to AudioRegion::set_live_state()
+	   to handle the relevant stuff.
+	*/
+
+	return Region::set_state (node);
+}
+
+void
+MidiRegion::recompute_at_end ()
+{
+	/* our length has changed
+	 * (non destructively) "chop" notes that pass the end boundary, to
+	 * prevent stuck notes.
+	 */
+}	
+
+void
+MidiRegion::recompute_at_start ()
+{
+	/* as above, but the shift was from the front
+	 * maybe bump currently active note's note-ons up so they sound here?
+	 * that could be undesireable in certain situations though.. maybe
+	 * remove the note entirely, including it's note off?  something needs to
+	 * be done to keep the played MIDI sane to avoid messing up voices of
+	 * polyhonic things etc........
+	 */
+}
+
+int
+MidiRegion::separate_by_channel (Session& session, vector<MidiRegion*>& v) const
+{
+	// Separate by MIDI channel?  bit different from audio since this is separating based
+	// on the actual contained data and destructively modifies and creates new sources..
+	
+#if 0
+	SourceList srcs;
+	string new_name;
+
+	for (SourceList::const_iterator i = _master_sources.begin(); i != _master_sources.end(); ++i) {
+
+		srcs.clear ();
+		srcs.push_back (*i);
+
+		/* generate a new name */
+		
+		if (session.region_name (new_name, _name)) {
+			return -1;
+		}
+
+		/* create a copy with just one source */
+
+		v.push_back (new MidiRegion (srcs, _start, _length, new_name, _layer, _flags));
+	}
+#endif
+
+	// Actually, I would prefer not if that's alright
+	return -1;
+}
+
+int
+MidiRegion::exportme (ARDOUR::Session&, ARDOUR::ExportSpecification&)
+{
+	return -1;
+}
+
+boost::shared_ptr<MidiSource>
+MidiRegion::midi_source (uint32_t n) const
+{
+	// Guaranteed to succeed (use a static cast?)
+	return boost::dynamic_pointer_cast<MidiSource>(source(n));
+}
+
+
+void
+MidiRegion::switch_source(boost::shared_ptr<Source> src)
+{
+	boost::shared_ptr<MidiSource> msrc = boost::dynamic_pointer_cast<MidiSource>(src);
+	if (!msrc)
+		return;
+
+	// MIDI regions have only one source
+	_sources.clear();
+	_sources.push_back(msrc);
+
+	set_name(msrc->name());
+}
+