I swear I already did this. git-svn-id: svn://localhost/ardour2/branches/3.0@4564 d708f5d6-7413-0410-9779-e7cbd77b26cf
275 lines
6.1 KiB
C++
275 lines
6.1 KiB
C++
/* This file is part of Evoral.
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* Copyright (C) 2008 Dave Robillard <http://drobilla.net>
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* Copyright (C) 2000-2008 Paul Davis
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* Author: Hans Baier
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*
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* Evoral is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for 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 St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define __STDC_LIMIT_MACROS 1
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#include <cassert>
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#include <iostream>
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#include <stdint.h>
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#include "evoral/Event.hpp"
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#include "evoral/SMF.hpp"
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#include "libsmf/smf.h"
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using namespace std;
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namespace Evoral {
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template<typename Time>
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SMF<Time>::~SMF()
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{
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if (_smf) {
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smf_delete(_smf);
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_smf = 0;
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_smf_track = 0;
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}
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}
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template<typename Time>
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uint16_t
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SMF<Time>::num_tracks() const
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{
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return _smf->number_of_tracks;
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}
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template<typename Time>
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uint16_t
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SMF<Time>::ppqn() const
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{
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return _smf->ppqn;
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}
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/** Seek to the specified track (1-based indexing)
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* \return 0 on success
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*/
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template<typename Time>
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int
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SMF<Time>::seek_to_track(int track)
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{
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_smf_track = smf_get_track_by_number(_smf, track);
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if (_smf_track != NULL) {
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_smf_track->next_event_number = (_smf_track->number_of_events == 0) ? 0 : 1;
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return 0;
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} else {
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return -1;
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}
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}
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/** Attempt to open the SMF file for reading and/or writing.
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*
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* \return 0 on success
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* -1 if the file can not be opened or created
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* -2 if the file exists but specified track does not exist
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*/
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template<typename Time>
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int
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SMF<Time>::open(const std::string& path, int track) THROW_FILE_ERROR
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{
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assert(track >= 1);
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if (_smf) {
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smf_delete(_smf);
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}
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_path = path;
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_smf = smf_load(_path.c_str());
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if (_smf == NULL) {
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return -1;
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}
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_smf_track = smf_get_track_by_number(_smf, track);
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if (!_smf_track)
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return -2;
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cerr << "Track " << track << " # events: " << _smf_track->number_of_events << endl;
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if (_smf_track->number_of_events == 0) {
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_smf_track->next_event_number = 0;
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_empty = true;
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} else {
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_smf_track->next_event_number = 1;
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_empty = false;
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}
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return 0;
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}
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/** Attempt to create a new SMF file for reading and/or writing.
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*
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* \return 0 on success
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* -1 if the file can not be created
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* -2 if the track can not be created
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*/
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template<typename Time>
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int
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SMF<Time>::create(const std::string& path, int track, uint16_t ppqn) THROW_FILE_ERROR
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{
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assert(track >= 1);
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if (_smf) {
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smf_delete(_smf);
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}
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_path = path;
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_smf = smf_new();
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if (smf_set_ppqn(_smf, ppqn) != 0) {
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throw FileError();
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}
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if (_smf == NULL) {
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return -1;
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}
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for (int i = 0; i < track; ++i) {
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_smf_track = smf_track_new();
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assert(_smf_track);
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smf_add_track(_smf, _smf_track);
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}
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_smf_track = smf_get_track_by_number(_smf, track);
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if (!_smf_track)
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return -2;
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_smf_track->next_event_number = 0;
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_empty = true;
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return 0;
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}
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template<typename Time>
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void
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SMF<Time>::close() THROW_FILE_ERROR
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{
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if (_smf) {
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if (smf_save(_smf, _path.c_str()) != 0) {
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throw FileError();
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}
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smf_delete(_smf);
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_smf = 0;
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_smf_track = 0;
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}
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}
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template<typename Time>
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void
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SMF<Time>::seek_to_start() const
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{
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_smf_track->next_event_number = 1;
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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, in SMF tempo-based ticks, using the
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* rate given by ppqn() (it is the caller's responsibility to calculate a real time).
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*
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* \a buf must be a pointer to a buffer allocated with malloc, or a pointer to NULL.
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* \a size must be the capacity of \a buf. If it is not large enough, \a buf will
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* be reallocated and *size will be set to the new size of buf.
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*
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* \return event length (including status byte) on success, 0 if event was
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* skipped (e.g. a meta event), or -1 on EOF (or end of track).
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*/
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template<typename Time>
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int
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SMF<Time>::read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf) const
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{
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smf_event_t* event;
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assert(delta_t);
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assert(size);
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assert(buf);
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if ((event = smf_track_get_next_event(_smf_track)) != NULL) {
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if (smf_event_is_metadata(event)) {
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return 0;
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}
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*delta_t = event->delta_time_pulses;
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int event_size = event->midi_buffer_length;
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assert(event_size > 0);
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// Make sure we have enough scratch buffer
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if (*size < (unsigned)event_size) {
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*buf = (uint8_t*)realloc(*buf, event_size);
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}
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memcpy(*buf, event->midi_buffer, size_t(event_size));
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*size = event_size;
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/*printf("SMF::read_event:\n");
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for (size_t i=0; i < *size; ++i) {
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printf("%X ", (*buf)[i]);
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} printf("\n");*/
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return event_size;
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} else {
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return -1;
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}
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}
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template<typename Time>
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void
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SMF<Time>::append_event_delta(uint32_t delta_t, const Event<Time>& ev)
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{
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assert(ev.size() > 0);
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/*printf("SMF::append_event_delta:\n");
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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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} printf("\n");*/
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smf_event_t* event;
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event = smf_event_new_from_pointer((void *) ev.buffer(), int(ev.size()));
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assert(event != NULL);
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memcpy(event->midi_buffer, ev.buffer(), ev.size());
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assert(_smf_track);
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smf_track_add_event_delta_pulses(_smf_track, event, int(delta_t));
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if (ev.size() > 0) {
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_empty = false;
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}
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}
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template<typename Time>
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void
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SMF<Time>::begin_write()
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{
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assert(_smf_track);
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smf_track_delete(_smf_track);
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_smf_track = smf_track_new();
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assert(_smf_track);
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smf_add_track(_smf, _smf_track);
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assert(_smf->number_of_tracks == 1);
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}
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template<typename Time>
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void
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SMF<Time>::end_write() THROW_FILE_ERROR
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{
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if (smf_save(_smf, _path.c_str()) != 0)
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throw FileError();
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}
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template class SMF<double>;
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} // namespace Evoral
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