205 lines
6.7 KiB
C++
205 lines
6.7 KiB
C++
/*
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* Copyright (C) 2011-2015 David Robillard <d@drobilla.net>
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* Copyright (C) 2011-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2014-2019 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifdef WAF_BUILD
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#include "libardour-config.h"
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#endif
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#include "pbd/error.h"
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#include "ardour/midi_playlist.h"
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#include "ardour/midi_playlist_source.h"
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#include "pbd/i18n.h"
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using namespace std;
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using namespace ARDOUR;
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using namespace PBD;
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namespace ARDOUR {
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class MidiStateTracker;
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class Session;
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template <typename T> class MidiRingBuffer;
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}
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namespace Evoral {
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template <typename T> class EventSink;
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template <typename Time> class Event;
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}
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/*******************************************************************************
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As of May 2011, it appears too complex to support compound regions for MIDI
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because of the need to be able to edit the data represented by the region. It
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seems that it would be a better idea to render the consituent regions into a
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new MIDI file and create a new region based on that, an operation we have been
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calling "consolidate"
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This code has been in place as a stub in case anyone gets any brilliant ideas
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on other ways to approach this issue.
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********************************************************************************/
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MidiPlaylistSource::MidiPlaylistSource (Session& s, const ID& orig, const std::string& name, boost::shared_ptr<MidiPlaylist> p,
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uint32_t /*chn*/, sampleoffset_t begin, samplecnt_t len, Source::Flag flags)
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: Source (s, DataType::MIDI, name)
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, MidiSource (s, name, flags)
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, PlaylistSource (s, orig, name, p, DataType::MIDI, begin, len, flags)
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{
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}
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MidiPlaylistSource::MidiPlaylistSource (Session& s, const XMLNode& node)
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: Source (s, node)
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, MidiSource (s, node)
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, PlaylistSource (s, node)
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{
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/* PlaylistSources are never writable, renameable, removable or destructive */
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_flags = Flag (_flags & ~(Writable|CanRename|Removable|RemovableIfEmpty|RemoveAtDestroy|Destructive));
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/* ancestors have already called ::set_state() in their XML-based
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constructors.
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*/
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if (set_state (node, Stateful::loading_state_version, false)) {
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throw failed_constructor ();
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}
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}
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MidiPlaylistSource::~MidiPlaylistSource ()
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{
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}
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XMLNode&
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MidiPlaylistSource::get_state ()
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{
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XMLNode& node (MidiSource::get_state ());
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/* merge PlaylistSource state */
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PlaylistSource::add_state (node);
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return node;
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}
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int
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MidiPlaylistSource::set_state (const XMLNode& node, int version)
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{
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return set_state (node, version, true);
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}
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int
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MidiPlaylistSource::set_state (const XMLNode& node, int version, bool with_descendants)
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{
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if (with_descendants) {
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if (Source::set_state (node, version) ||
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MidiSource::set_state (node, version) ||
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PlaylistSource::set_state (node, version)) {
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return -1;
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}
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}
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return 0;
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}
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samplecnt_t
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MidiPlaylistSource::length (samplepos_t) const
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{
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pair<samplepos_t,samplepos_t> extent = _playlist->get_extent();
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return extent.second - extent.first;
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}
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samplecnt_t
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MidiPlaylistSource::read_unlocked (const Lock& lock,
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Evoral::EventSink<samplepos_t>& dst,
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samplepos_t /*position*/,
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samplepos_t start,
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samplecnt_t cnt,
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Evoral::Range<samplepos_t>* loop_range,
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MidiStateTracker*,
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MidiChannelFilter*) const
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{
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boost::shared_ptr<MidiPlaylist> mp = boost::dynamic_pointer_cast<MidiPlaylist> (_playlist);
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if (!mp) {
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return 0;
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}
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/* XXX paul says on Oct 26 2019:
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rgareus: so to clarify now that i have better perspective: the API i want to get rid of is MidiPlaylist::read() ; everything that used it (i.e. the DiskReader) should use MidiPlaylist::rendered()->read()
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rgareus: but a "read" operation is also a "write" operation: you have to put the data somewhere
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rgareus: the only other user of MidiPlaylist::read() was MidiPlaylistSource (unsurprisingly), which as I noted is not even (really) used
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rgareus: ::rendered() returns a ptr-to-RT_MidiBuffer, which has a read method which expects to write into a MidiBuffer, using push_back()
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rgareus: but MidiPlaylistSource::read() is given an EventSink<samplepos_t> as the destination, and this does not (currently) have ::push_back(), only ::write() (which is willing to deal with inserts rather than appends)
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rgareus: so, this is the API "mess" I'm trying to clean up. simple solution: since we don't use MidiPlaylistSource just comment out the line and forget about it for now, then remove MidiPlaylist::read() and move on
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This represents that decision, for now.
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*/
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return cnt; // mp->read (dst, start, cnt, loop_range);
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}
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samplecnt_t
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MidiPlaylistSource::write_unlocked (const Lock&,
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MidiRingBuffer<samplepos_t>&,
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samplepos_t,
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samplecnt_t)
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{
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fatal << string_compose (_("programming error: %1"), "MidiPlaylistSource::write_unlocked() called - should be impossible") << endmsg;
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abort(); /*NOTREACHED*/
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return 0;
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}
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void
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MidiPlaylistSource::append_event_beats(const Glib::Threads::Mutex::Lock& /*lock*/, const Evoral::Event<Temporal::Beats>& /*ev*/)
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{
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fatal << string_compose (_("programming error: %1"), "MidiPlaylistSource::append_event_beats() called - should be impossible") << endmsg;
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abort(); /*NOTREACHED*/
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}
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void
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MidiPlaylistSource::append_event_samples(const Glib::Threads::Mutex::Lock& /*lock*/, const Evoral::Event<samplepos_t>& /* ev */, samplepos_t /*source_start*/)
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{
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fatal << string_compose (_("programming error: %1"), "MidiPlaylistSource::append_event_samples() called - should be impossible") << endmsg;
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abort(); /*NOTREACHED*/
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}
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void
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MidiPlaylistSource::load_model (const Glib::Threads::Mutex::Lock&, bool)
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{
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/* nothing to do */
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}
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void
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MidiPlaylistSource::destroy_model (const Glib::Threads::Mutex::Lock&)
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{
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/* nothing to do */
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}
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void
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MidiPlaylistSource::flush_midi (const Lock& lock)
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{
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}
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bool
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MidiPlaylistSource::empty () const
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{
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return !_playlist || _playlist->empty();
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}
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