David Robillard
532f6aad4a
NOTE: Compiles, but broken (crash on adding MIDI track). git-svn-id: svn://localhost/ardour2/branches/midi@1292 d708f5d6-7413-0410-9779-e7cbd77b26cf
747 lines
16 KiB
C++
747 lines
16 KiB
C++
/*
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Copyright (C) 2006 Paul Davis
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Written by Dave Robillard, 2006
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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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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <vector>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <pbd/mountpoint.h>
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#include <pbd/pathscanner.h>
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#include <pbd/stl_delete.h>
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#include <pbd/strsplit.h>
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#include <glibmm/miscutils.h>
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#include <ardour/smf_source.h>
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#include <ardour/session.h>
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#include <ardour/midi_ring_buffer.h>
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#include <ardour/midi_util.h>
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#include "i18n.h"
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using namespace ARDOUR;
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string SMFSource::_search_path;
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/*sigc::signal<void,struct tm*, time_t> SMFSource::HeaderPositionOffsetChanged;
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bool SMFSource::header_position_negative;
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uint64_t SMFSource::header_position_offset;
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*/
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SMFSource::SMFSource (Session& s, std::string path, Flag flags)
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: MidiSource (s, region_name_from_path(path, false))
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, _channel(0)
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, _flags (Flag(flags | Writable)) // FIXME: this needs to be writable for now
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, _allow_remove_if_empty(true)
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, _timeline_position (0)
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, _fd (0)
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, _last_ev_time(0)
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, _track_size(4) // 4 bytes for the ever-present EOT event
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, _header_size(22)
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{
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/* constructor used for new internal-to-session files. file cannot exist */
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if (init (path, false)) {
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throw failed_constructor ();
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}
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if (open()) {
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throw failed_constructor ();
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}
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assert(_name.find("/") == string::npos);
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}
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SMFSource::SMFSource (Session& s, const XMLNode& node)
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: MidiSource (s, node)
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, _channel(0)
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, _flags (Flag (Writable|CanRename))
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, _allow_remove_if_empty(true)
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, _timeline_position (0)
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, _fd (0)
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, _last_ev_time(0)
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, _track_size(4) // 4 bytes for the ever-present EOT event
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, _header_size(22)
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{
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/* constructor used for existing internal-to-session files. file must exist */
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if (set_state (node)) {
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throw failed_constructor ();
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}
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if (init (_name, true)) {
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throw failed_constructor ();
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}
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if (open()) {
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throw failed_constructor ();
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}
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assert(_name.find("/") == string::npos);
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}
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SMFSource::~SMFSource ()
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{
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if (removable()) {
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unlink (_path.c_str());
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}
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}
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bool
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SMFSource::removable () const
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{
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return (_flags & Removable) && ((_flags & RemoveAtDestroy) ||
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((_flags & RemovableIfEmpty) && is_empty (_path)));
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}
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int
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SMFSource::init (string pathstr, bool must_exist)
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{
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bool is_new = false;
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if (!find (pathstr, must_exist, is_new)) {
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cerr << "cannot find " << pathstr << " with me = " << must_exist << endl;
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return -1;
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}
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if (is_new && must_exist) {
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return -1;
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}
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assert(_name.find("/") == string::npos);
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return 0;
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}
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int
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SMFSource::open()
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{
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cerr << "Opening SMF file " << path() << " writeable: " << writable() << endl;
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assert(writable()); // FIXME;
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_fd = fopen(path().c_str(), "r+");
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// File already exists
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if (_fd) {
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fseek(_fd, _header_size - 4, 0);
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uint32_t track_size_be = 0;
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fread(&track_size_be, 4, 1, _fd);
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_track_size = GUINT32_FROM_BE(track_size_be);
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cerr << "SMF - read track size " << _track_size;
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// We're making a new file
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} else {
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_fd = fopen(path().c_str(), "w+");
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_track_size = 0;
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// write a tentative header just to pad things out so writing happens in the right spot
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flush_header();
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// FIXME: write the footer here too so it's a valid SMF (screw up writing ATM though)
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}
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return (_fd == 0) ? -1 : 0;
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}
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int
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SMFSource::update_header (jack_nframes_t when, struct tm&, time_t)
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{
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_timeline_position = when;
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return flush_header();
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}
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int
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SMFSource::flush_header ()
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{
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// FIXME: write timeline position somehow?
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cerr << "SMF Flushing header\n";
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assert(_fd);
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const uint16_t type = GUINT16_TO_BE(0); // SMF Type 0 (single track)
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const uint16_t ntracks = GUINT16_TO_BE(1); // Number of tracks (always 1 for Type 0)
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const uint16_t division = GUINT16_TO_BE(1920); // FIXME FIXME FIXME PPQN
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char data[6];
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memcpy(data, &type, 2);
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memcpy(data+2, &ntracks, 2);
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memcpy(data+4, &division, 2);
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_fd = freopen(path().c_str(), "r+", _fd);
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assert(_fd);
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fseek(_fd, 0, 0);
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write_chunk("MThd", 6, data);
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//if (_track_size > 0) {
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write_chunk_header("MTrk", _track_size);
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//}
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fflush(_fd);
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return 0;
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}
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int
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SMFSource::flush_footer()
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{
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cerr << "SMF - Writing EOT\n";
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fseek(_fd, 0, SEEK_END);
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write_var_len(1); // whatever...
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char eot[4] = { 0xFF, 0x2F, 0x00 }; // end-of-track meta-event
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fwrite(eot, 1, 4, _fd);
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fflush(_fd);
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return 0;
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}
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/** Returns the offset of the first event in the file with a time past @a start,
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* relative to the start of the source.
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*
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* Returns -1 if not found.
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*/
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/*
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long
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SMFSource::find_first_event_after(jack_nframes_t start)
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{
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// FIXME: obviously this is slooow
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fseek(_fd, _header_size, 0);
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while ( ! feof(_fd) ) {
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const uint32_t delta_time = read_var_len();
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if (delta_time > start)
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return delta_time;
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}
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return -1;
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}
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*/
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/** Read an event from the current position in file.
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*
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* File position MUST be at the beginning of a delta time, or this will die very messily.
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* ev.buffer must be of size ev.size, and large enough for the event. The returned event
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* will have it's time field set to it's delta time (so it's the caller's responsibility
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* to calculate a real time for the event).
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*
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* Returns event length (including status byte) on success, 0 if event was
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* skipped (eg a meta event), or -1 on EOF (or end of track).
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*/
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int
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SMFSource::read_event(MidiEvent& ev) const
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{
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// - 4 is for the EOT event, which we don't actually want to read
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//if (feof(_fd) || ftell(_fd) >= _header_size + _track_size - 4) {
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if (feof(_fd)) {
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return -1;
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}
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uint32_t delta_time = read_var_len();
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int status = fgetc(_fd);
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assert(status != EOF); // FIXME die gracefully
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if (status == 0xFF) {
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assert(!feof(_fd));
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int type = fgetc(_fd);
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if ((unsigned char)type == 0x2F) {
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//cerr << "SMF - hit EOT" << endl;
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return -1; // we hit the logical EOF anyway...
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} else {
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ev.size = 0;
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ev.time = delta_time; // this is needed regardless
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return 0;
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}
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}
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ev.buffer[0] = (unsigned char)status;
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ev.size = midi_event_size(ev.buffer[0]) + 1;
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fread(ev.buffer+1, 1, ev.size - 1, _fd);
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ev.time = delta_time;
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/*printf("SMF - read event, delta = %u, size = %zu, data = ",
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delta_time, ev.size);
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for (size_t i=0; i < ev.size; ++i) {
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printf("%X ", ev.buffer[i]);
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}
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printf("\n");*/
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return ev.size;
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}
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jack_nframes_t
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SMFSource::read_unlocked (MidiRingBuffer& dst, jack_nframes_t start, jack_nframes_t cnt, jack_nframes_t stamp_offset) const
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{
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//cerr << "SMF - read " << start << ", count=" << cnt << ", offset=" << stamp_offset << endl;
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jack_nframes_t time = 0;
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// FIXME: ugh
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unsigned char ev_buf[MidiBuffer::max_event_size()];
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MidiEvent ev;
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ev.time = 0;
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ev.size = MidiBuffer::max_event_size();
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ev.buffer = ev_buf;
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// FIXME: it would be an impressive feat to actually make this any slower :)
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fseek(_fd, _header_size, 0);
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while (!feof(_fd)) {
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int ret = read_event(ev);
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if (ret == -1) { // EOF
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//cerr << "SMF - EOF\n";
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break;
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}
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if (ret == 0) { // meta-event (skipped)
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//cerr << "SMF - META\n";
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time += ev.time; // just accumulate delta time and ignore event
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continue;
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}
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time += ev.time; // accumulate delta time
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ev.time = time; // set ev.time to actual time (relative to source start)
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if (ev.time >= start) {
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if (ev.time > start + cnt) {
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break;
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} else {
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ev.time += stamp_offset;
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dst.write(ev);
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}
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}
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}
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return cnt;
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}
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jack_nframes_t
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SMFSource::write_unlocked (MidiRingBuffer& src, jack_nframes_t cnt)
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{
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//cerr << "SMF WRITE -- " << _length << "--" << cnt << endl;
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MidiBuffer buf(1024); // FIXME: allocation, size?
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src.read(buf, /*_length*/0, _length + cnt); // FIXME?
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fseek(_fd, 0, SEEK_END);
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// FIXME: start of source time?
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for (size_t i=0; i < buf.size(); ++i) {
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const MidiEvent& ev = buf[i];
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assert(ev.time >= _timeline_position);
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uint32_t delta_time = (ev.time - _timeline_position) - _last_ev_time;
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/*printf("SMF - writing event, delta = %u, size = %zu, data = ",
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delta_time, ev.size);
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for (size_t i=0; i < ev.size; ++i) {
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printf("%X ", ev.buffer[i]);
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}
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printf("\n");
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*/
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size_t stamp_size = write_var_len(delta_time);
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fwrite(ev.buffer, 1, ev.size, _fd);
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_last_ev_time += delta_time;
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_track_size += stamp_size + ev.size;
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}
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fflush(_fd);
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if (buf.size() > 0) {
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ViewDataRangeReady (_length, cnt); /* EMIT SIGNAL */
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}
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update_length(_length, cnt);
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return cnt;
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}
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XMLNode&
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SMFSource::get_state ()
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{
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XMLNode& root (MidiSource::get_state());
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char buf[16];
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snprintf (buf, sizeof (buf), "0x%x", (int)_flags);
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root.add_property ("flags", buf);
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return root;
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}
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int
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SMFSource::set_state (const XMLNode& node)
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{
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const XMLProperty* prop;
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if (MidiSource::set_state (node)) {
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return -1;
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}
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if ((prop = node.property (X_("flags"))) != 0) {
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int ival;
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sscanf (prop->value().c_str(), "0x%x", &ival);
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_flags = Flag (ival);
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} else {
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_flags = Flag (0);
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}
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assert(_name.find("/") == string::npos);
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return 0;
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}
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void
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SMFSource::mark_for_remove ()
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{
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if (!writable()) {
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return;
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}
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_flags = Flag (_flags | RemoveAtDestroy);
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}
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void
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SMFSource::mark_streaming_write_completed ()
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{
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if (!writable()) {
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return;
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}
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flush_footer();
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#if 0
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Glib::Mutex::Lock lm (_lock);
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next_peak_clear_should_notify = true;
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if (_peaks_built || pending_peak_builds.empty()) {
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_peaks_built = true;
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PeaksReady (); /* EMIT SIGNAL */
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}
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#endif
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}
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void
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SMFSource::mark_take (string id)
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{
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if (writable()) {
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_take_id = id;
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}
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}
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int
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SMFSource::move_to_trash (const string trash_dir_name)
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{
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string newpath;
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if (!writable()) {
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return -1;
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}
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/* don't move the file across filesystems, just
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stick it in the 'trash_dir_name' directory
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on whichever filesystem it was already on.
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*/
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newpath = Glib::path_get_dirname (_path);
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newpath = Glib::path_get_dirname (newpath);
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newpath += '/';
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newpath += trash_dir_name;
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newpath += '/';
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newpath += Glib::path_get_basename (_path);
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if (access (newpath.c_str(), F_OK) == 0) {
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/* the new path already exists, try versioning */
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char buf[PATH_MAX+1];
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int version = 1;
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string newpath_v;
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snprintf (buf, sizeof (buf), "%s.%d", newpath.c_str(), version);
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newpath_v = buf;
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while (access (newpath_v.c_str(), F_OK) == 0 && version < 999) {
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snprintf (buf, sizeof (buf), "%s.%d", newpath.c_str(), ++version);
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newpath_v = buf;
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}
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if (version == 999) {
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PBD::error << string_compose (_("there are already 1000 files with names like %1; versioning discontinued"),
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newpath)
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<< endmsg;
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} else {
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newpath = newpath_v;
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}
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} else {
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/* it doesn't exist, or we can't read it or something */
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}
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if (::rename (_path.c_str(), newpath.c_str()) != 0) {
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PBD::error << string_compose (_("cannot rename midi file source from %1 to %2 (%3)"),
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_path, newpath, strerror (errno))
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<< endmsg;
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return -1;
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}
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#if 0
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if (::unlink (peakpath.c_str()) != 0) {
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PBD::error << string_compose (_("cannot remove peakfile %1 for %2 (%3)"),
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peakpath, _path, strerror (errno))
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<< endmsg;
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/* try to back out */
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rename (newpath.c_str(), _path.c_str());
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return -1;
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}
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_path = newpath;
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peakpath = "";
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#endif
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/* file can not be removed twice, since the operation is not idempotent */
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_flags = Flag (_flags & ~(RemoveAtDestroy|Removable|RemovableIfEmpty));
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return 0;
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}
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// FIXME: Merge this with audiofilesource somehow (make a generic filesource?)
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bool
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SMFSource::find (string pathstr, bool must_exist, bool& isnew)
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{
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string::size_type pos;
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bool ret = false;
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isnew = false;
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/* clean up PATH:CHANNEL notation so that we are looking for the correct path */
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if ((pos = pathstr.find_last_of (':')) == string::npos) {
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pathstr = pathstr;
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} else {
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pathstr = pathstr.substr (0, pos);
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}
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if (pathstr[0] != '/') {
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/* non-absolute pathname: find pathstr in search path */
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vector<string> dirs;
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int cnt;
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string fullpath;
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string keeppath;
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|
|
if (_search_path.length() == 0) {
|
|
PBD::error << _("FileSource: search path not set") << endmsg;
|
|
goto out;
|
|
}
|
|
|
|
split (_search_path, dirs, ':');
|
|
|
|
cnt = 0;
|
|
|
|
for (vector<string>::iterator i = dirs.begin(); i != dirs.end(); ++i) {
|
|
|
|
fullpath = *i;
|
|
if (fullpath[fullpath.length()-1] != '/') {
|
|
fullpath += '/';
|
|
}
|
|
fullpath += pathstr;
|
|
|
|
if (access (fullpath.c_str(), R_OK) == 0) {
|
|
keeppath = fullpath;
|
|
++cnt;
|
|
}
|
|
}
|
|
|
|
if (cnt > 1) {
|
|
|
|
PBD::error << string_compose (_("FileSource: \"%1\" is ambigous when searching %2\n\t"), pathstr, _search_path) << endmsg;
|
|
goto out;
|
|
|
|
} else if (cnt == 0) {
|
|
|
|
if (must_exist) {
|
|
PBD::error << string_compose(_("Filesource: cannot find required file (%1): while searching %2"), pathstr, _search_path) << endmsg;
|
|
goto out;
|
|
} else {
|
|
isnew = true;
|
|
}
|
|
}
|
|
|
|
_name = pathstr;
|
|
_path = keeppath;
|
|
ret = true;
|
|
|
|
} else {
|
|
|
|
/* external files and/or very very old style sessions include full paths */
|
|
|
|
_path = pathstr;
|
|
_name = pathstr.substr (pathstr.find_last_of ('/') + 1);
|
|
|
|
if (access (_path.c_str(), R_OK) != 0) {
|
|
|
|
/* file does not exist or we cannot read it */
|
|
|
|
if (must_exist) {
|
|
PBD::error << string_compose(_("Filesource: cannot find required file (%1): %2"), _path, strerror (errno)) << endmsg;
|
|
goto out;
|
|
}
|
|
|
|
if (errno != ENOENT) {
|
|
PBD::error << string_compose(_("Filesource: cannot check for existing file (%1): %2"), _path, strerror (errno)) << endmsg;
|
|
goto out;
|
|
}
|
|
|
|
/* a new file */
|
|
|
|
isnew = true;
|
|
ret = true;
|
|
|
|
} else {
|
|
|
|
/* already exists */
|
|
|
|
ret = true;
|
|
}
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
SMFSource::set_search_path (string p)
|
|
{
|
|
_search_path = p;
|
|
}
|
|
|
|
|
|
void
|
|
SMFSource::set_allow_remove_if_empty (bool yn)
|
|
{
|
|
if (writable()) {
|
|
_allow_remove_if_empty = yn;
|
|
}
|
|
}
|
|
|
|
int
|
|
SMFSource::set_name (string newname, bool destructive)
|
|
{
|
|
//Glib::Mutex::Lock lm (_lock); FIXME
|
|
string oldpath = _path;
|
|
string newpath = Session::change_midi_path_by_name (oldpath, _name, newname, destructive);
|
|
|
|
if (newpath.empty()) {
|
|
PBD::error << string_compose (_("programming error: %1"), "cannot generate a changed midi path") << endmsg;
|
|
return -1;
|
|
}
|
|
|
|
if (rename (oldpath.c_str(), newpath.c_str()) != 0) {
|
|
PBD::error << string_compose (_("cannot rename midi file for %1 to %2"), _name, newpath) << endmsg;
|
|
return -1;
|
|
}
|
|
|
|
_name = Glib::path_get_basename (newpath);
|
|
_path = newpath;
|
|
|
|
return 0;//rename_peakfile (peak_path (_path));
|
|
}
|
|
|
|
bool
|
|
SMFSource::is_empty (string path)
|
|
{
|
|
/* XXX fix me */
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
void
|
|
SMFSource::write_chunk_header(char id[4], uint32_t length)
|
|
{
|
|
const uint32_t length_be = GUINT32_TO_BE(length);
|
|
|
|
fwrite(id, 1, 4, _fd);
|
|
fwrite(&length_be, 4, 1, _fd);
|
|
}
|
|
|
|
void
|
|
SMFSource::write_chunk(char id[4], uint32_t length, void* data)
|
|
{
|
|
write_chunk_header(id, length);
|
|
|
|
fwrite(data, 1, length, _fd);
|
|
}
|
|
|
|
/** Returns the size (in bytes) of the value written. */
|
|
size_t
|
|
SMFSource::write_var_len(uint32_t value)
|
|
{
|
|
size_t ret = 0;
|
|
|
|
uint32_t buffer = value & 0x7F;
|
|
|
|
while ( (value >>= 7) ) {
|
|
buffer <<= 8;
|
|
buffer |= ((value & 0x7F) | 0x80);
|
|
}
|
|
|
|
while (true) {
|
|
//printf("Writing var len byte %X\n", (unsigned char)buffer);
|
|
++ret;
|
|
fputc(buffer, _fd);
|
|
if (buffer & 0x80)
|
|
buffer >>= 8;
|
|
else
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
uint32_t
|
|
SMFSource::read_var_len() const
|
|
{
|
|
assert(!feof(_fd));
|
|
|
|
//int offset = ftell(_fd);
|
|
//cerr << "SMF - reading var len at " << offset << endl;
|
|
|
|
uint32_t value;
|
|
unsigned char c;
|
|
|
|
if ( (value = getc(_fd)) & 0x80 ) {
|
|
value &= 0x7F;
|
|
do {
|
|
assert(!feof(_fd));
|
|
value = (value << 7) + ((c = getc(_fd)) & 0x7F);
|
|
} while (c & 0x80);
|
|
}
|
|
|
|
return value;
|
|
}
|