/* This file is part of Evoral.
* Copyright (C) 2008 Dave Robillard <http://drobilla.net>
* Copyright (C) 2000-2008 Paul Davis
+ * Author: Hans Baier
*
* Evoral 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
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
+#define __STDC_LIMIT_MACROS 1
#include <cassert>
+#include <cmath>
#include <iostream>
-#include <glibmm/miscutils.h>
-#include "evoral/midi_util.h"
-#include "evoral/SMF.hpp"
-#include "evoral/SMFReader.hpp"
+#include <stdint.h>
+#include "libsmf/smf.h"
#include "evoral/Event.hpp"
+#include "evoral/SMF.hpp"
+#include "evoral/midi_util.h"
using namespace std;
namespace Evoral {
-template<typename Time>
-SMF<Time>::SMF()
- : _fd(0)
- , _last_ev_time(0)
- , _track_size(4) // 4 bytes for the ever-present EOT event
- , _header_size(22)
- , _empty(true)
+SMF::~SMF()
+{
+ if (_smf) {
+ smf_delete(_smf);
+ _smf = 0;
+ _smf_track = 0;
+ }
+}
+
+uint16_t
+SMF::num_tracks() const
{
+ return _smf->number_of_tracks;
}
-template<typename Time>
-SMF<Time>::~SMF()
+uint16_t
+SMF::ppqn() const
{
+ return _smf->ppqn;
}
-/** Attempt to open the SMF file for reading and writing.
- *
- * Currently SMF is always read/write.
- *
- * \return 0 on success
- * -1 if the file can not be opened for reading,
- * -2 if the file can not be opened for writing
+/** Seek to the specified track (1-based indexing)
+ * \return 0 on success
*/
-template<typename Time>
int
-SMF<Time>::open(const std::string& path) THROW_FILE_ERROR
-
+SMF::seek_to_track(int track)
{
- //cerr << "Opening SMF file " << path() << " writeable: " << writable() << endl;
- _fd = fopen(path.c_str(), "r+");
-
- // File already exists
- if (_fd) {
- fseek(_fd, _header_size - 4, 0);
- uint32_t track_size_be = 0;
- fread(&track_size_be, 4, 1, _fd);
- _track_size = GUINT32_FROM_BE(track_size_be);
- _empty = _track_size > 4;
- //cerr << "SMF - read track size " << _track_size << endl;
-
- // We're making a new file
+ _smf_track = smf_get_track_by_number(_smf, track);
+ if (_smf_track != NULL) {
+ _smf_track->next_event_number = (_smf_track->number_of_events == 0) ? 0 : 1;
+ return 0;
} else {
- _fd = fopen(path.c_str(), "w+");
- if (_fd == NULL) {
- cerr << "ERROR: Can not open SMF file " << path << " for writing: " <<
- strerror(errno) << endl;
- return -2;
- }
- _track_size = 4;
- _empty = true;
-
- // Write a tentative header just to pad things out so writing happens in the right spot
- flush_header();
- flush_footer();
+ return -1;
}
-
- return (_fd == 0) ? -1 : 0;
}
-template<typename Time>
-void
-SMF<Time>::close() THROW_FILE_ERROR
+/** Attempt to open the SMF file for reading and/or writing.
+ *
+ * \return 0 on success
+ * -1 if the file can not be opened or created
+ * -2 if the file exists but specified track does not exist
+ */
+int
+SMF::open(const std::string& path, int track) THROW_FILE_ERROR
{
- if (_fd) {
- flush_header();
- flush_footer();
- fclose(_fd);
- _fd = NULL;
+ assert(track >= 1);
+ if (_smf) {
+ smf_delete(_smf);
}
-}
-
-template<typename Time>
-void
-SMF<Time>::seek_to_start() const
-{
- fseek(_fd, _header_size, SEEK_SET);
-}
-
-template<typename Time>
-void
-SMF<Time>::seek_to_footer_position()
-{
- uint8_t buffer[4];
- // Check if there is a track end marker at the end of the data
- fseek(_fd, -4, SEEK_END);
- size_t read_bytes = fread(buffer, sizeof(uint8_t), 4, _fd);
+ _file_path = path;
+ _smf = smf_load(_file_path.c_str());
+ if (_smf == NULL) {
+ return -1;
+ }
- if ((read_bytes == 4)
- && buffer[0] == 0x00
- && buffer[1] == 0xFF
- && buffer[2] == 0x2F
- && buffer[3] == 0x00) {
- // there is one, so overwrite it
- fseek(_fd, -4, SEEK_END);
+ _smf_track = smf_get_track_by_number(_smf, track);
+ if (!_smf_track)
+ return -2;
+
+ //cerr << "Track " << track << " # events: " << _smf_track->number_of_events << endl;
+ if (_smf_track->number_of_events == 0) {
+ _smf_track->next_event_number = 0;
+ _empty = true;
} else {
- // there is none, so append
- fseek(_fd, 0, SEEK_END);
+ _smf_track->next_event_number = 1;
+ _empty = false;
}
+
+ return 0;
}
-template<typename Time>
-void
-SMF<Time>::flush()
-{
- fflush(_fd);
-}
-template<typename Time>
+/** Attempt to create a new SMF file for reading and/or writing.
+ *
+ * \return 0 on success
+ * -1 if the file can not be created
+ * -2 if the track can not be created
+ */
int
-SMF<Time>::flush_header()
+SMF::create(const std::string& path, int track, uint16_t ppqn) THROW_FILE_ERROR
{
- // FIXME: write timeline position somehow?
+ assert(track >= 1);
+ if (_smf) {
+ smf_delete(_smf);
+ }
- //cerr << path() << " SMF Flushing header\n";
-
- assert(_fd);
+ _file_path = path;
- const uint16_t type = GUINT16_TO_BE(0); // SMF Type 0 (single track)
- const uint16_t ntracks = GUINT16_TO_BE(1); // Number of tracks (always 1 for Type 0)
- const uint16_t division = GUINT16_TO_BE(_ppqn); // Pulses per quarter note (beat)
-
- char data[6];
- memcpy(data, &type, 2);
- memcpy(data+2, &ntracks, 2);
- memcpy(data+4, &division, 2);
-
- //_fd = freopen(path().c_str(), "r+", _fd);
- //assert(_fd);
- fseek(_fd, 0, SEEK_SET);
- write_chunk("MThd", 6, data);
- write_chunk_header("MTrk", _track_size);
+ _smf = smf_new();
+ if (smf_set_ppqn(_smf, ppqn) != 0) {
+ throw FileError();
+ }
+
+ if (_smf == NULL) {
+ return -1;
+ }
+
+ for (int i = 0; i < track; ++i) {
+ _smf_track = smf_track_new();
+ assert(_smf_track);
+ smf_add_track(_smf, _smf_track);
+ }
- fflush(_fd);
+ _smf_track = smf_get_track_by_number(_smf, track);
+ if (!_smf_track)
+ return -2;
+ _smf_track->next_event_number = 0;
+ _empty = true;
+
return 0;
}
-template<typename Time>
-int
-SMF<Time>::flush_footer()
+void
+SMF::close() THROW_FILE_ERROR
{
- //cerr << path() << " SMF Flushing footer\n";
- seek_to_footer_position();
- write_footer();
- seek_to_footer_position();
-
- return 0;
+ if (_smf) {
+ if (smf_save(_smf, _file_path.c_str()) != 0) {
+ throw FileError();
+ }
+ smf_delete(_smf);
+ _smf = 0;
+ _smf_track = 0;
+ }
}
-template<typename Time>
void
-SMF<Time>::write_footer()
+SMF::seek_to_start() const
{
- write_var_len(0);
- char eot[3] = { 0xFF, 0x2F, 0x00 }; // end-of-track meta-event
- fwrite(eot, 1, 3, _fd);
- fflush(_fd);
+ _smf_track->next_event_number = 1;
}
-
/** Read an event from the current position in file.
*
* File position MUST be at the beginning of a delta time, or this will die very messily.
* will have it's time field set to it's delta time, in SMF tempo-based ticks, using the
* rate given by ppqn() (it is the caller's responsibility to calculate a real time).
*
- * \a size should be the capacity of \a buf. If it is not large enough, \a buf will
- * be freed and a new buffer allocated in its place, the size of which will be placed
- * in size.
+ * \a buf must be a pointer to a buffer allocated with malloc, or a pointer to NULL.
+ * \a size must be the capacity of \a buf. If it is not large enough, \a buf will
+ * be reallocated and *size will be set to the new size of buf.
*
- * Returns event length (including status byte) on success, 0 if event was
- * skipped (eg a meta event), or -1 on EOF (or end of track).
+ * \return event length (including status byte) on success, 0 if event was
+ * skipped (e.g. a meta event), or -1 on EOF (or end of track).
*/
-template<typename Time>
int
-SMF<Time>::read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf) const
+SMF::read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf) const
{
- if (feof(_fd)) {
- return -1;
- }
-
+ smf_event_t* event;
+
assert(delta_t);
assert(size);
assert(buf);
-
- try {
- *delta_t = SMFReader::read_var_len(_fd);
- } catch (...) {
- return -1; // Premature EOF
- }
- if (feof(_fd)) {
- return -1; // Premature EOF
- }
-
- const int status = fgetc(_fd);
-
- if (status == EOF) {
- return -1; // Premature EOF
- }
-
- //printf("Status @ %X = %X\n", (unsigned)ftell(_fd) - 1, status);
-
- if (status == 0xFF) {
- if (feof(_fd)) {
- return -1; // Premature EOF
- }
- const int type = fgetc(_fd);
- if ((unsigned char)type == 0x2F) {
- return -1; // hit end of track
- } else {
- *size = 0;
- return 0;
- }
- }
-
- int event_size = midi_event_size((unsigned char)status);
- if (event_size <= 0) {
- if ((status & 0xff) == MIDI_CMD_COMMON_SYSEX) {
- event_size = SMFReader::read_var_len(_fd) + 1;
- } else {
- *size = 0;
- return 0;
- }
- }
-
- // Make sure we have enough scratch buffer
- if (*size < (unsigned)event_size)
- *buf = (uint8_t*)realloc(*buf, event_size);
+ if ((event = smf_track_get_next_event(_smf_track)) != NULL) {
+ if (smf_event_is_metadata(event)) {
+ return 0;
+ }
+ *delta_t = event->delta_time_pulses;
+
+ int event_size = event->midi_buffer_length;
+ assert(event_size > 0);
+
+ // Make sure we have enough scratch buffer
+ if (*size < (unsigned)event_size) {
+ *buf = (uint8_t*)realloc(*buf, event_size);
+ }
+ memcpy(*buf, event->midi_buffer, size_t(event_size));
+ *size = event_size;
- *size = event_size;
-
- (*buf)[0] = (unsigned char)status;
- if (event_size > 1)
- fread((*buf) + 1, 1, *size - 1, _fd);
-
- printf("SMF read event: delta = %u, size = %u, data = ", *delta_t, *size);
- for (size_t i=0; i < *size; ++i) {
- printf("%X ", (*buf)[i]);
- }
- printf("\n");
-
- return (int)*size;
+ assert(midi_event_is_valid(*buf, *size));
+
+ /*printf("SMF::read_event:\n");
+ for (size_t i = 0; i < *size; ++i) {
+ printf("%X ", (*buf)[i]);
+ } printf("\n");*/
+
+ return event_size;
+ } else {
+ return -1;
+ }
}
-template<typename Time>
void
-SMF<Time>::append_event_unlocked(uint32_t delta_t, const Event<Time>& ev)
+SMF::append_event_delta(uint32_t delta_t, uint32_t size, const uint8_t* buf)
{
- if (ev.size() == 0)
+ if (size == 0) {
return;
-
- size_t stamp_size = write_var_len(delta_t);
- if (ev.buffer()[0] == MIDI_CMD_COMMON_SYSEX) {
- fputc(MIDI_CMD_COMMON_SYSEX, _fd);
- stamp_size += write_var_len(ev.size() - 1);
- fwrite(ev.buffer() + 1, 1, ev.size() - 1, _fd);
- } else {
- fwrite(ev.buffer(), 1, ev.size(), _fd);
}
+
+ /*printf("SMF::append_event_delta:\n");
+ for (size_t i = 0; i < size; ++i) {
+ printf("%X ", buf[i]);
+ } printf("\n");*/
- _track_size += stamp_size + ev.size();
- _last_ev_time = ev.time();
-
- if (ev.size() > 0)
- _empty = false;
-}
+ if (!midi_event_is_valid(buf, size)) {
+ cerr << "WARNING: SMF ignoring illegal MIDI event" << endl;
+ return;
+ }
-template<typename Time>
-void
-SMF<Time>::begin_write(FrameTime start_frame)
-{
- _last_ev_time = 0;
- fseek(_fd, _header_size, SEEK_SET);
-}
+ smf_event_t* event;
-template<typename Time>
-void
-SMF<Time>::end_write() throw(typename MIDIFile<Time>::FileError)
-{
- flush_header();
- flush_footer();
+ event = smf_event_new_from_pointer(buf, size);
+ assert(event != NULL);
+
+ assert(_smf_track);
+ smf_track_add_event_delta_pulses(_smf_track, event, delta_t);
+ _empty = false;
}
-template<typename Time>
void
-SMF<Time>::write_chunk_header(const char id[4], uint32_t length)
+SMF::begin_write()
{
- const uint32_t length_be = GUINT32_TO_BE(length);
-
- fwrite(id, 1, 4, _fd);
- fwrite(&length_be, 4, 1, _fd);
+ assert(_smf_track);
+ smf_track_delete(_smf_track);
+
+ _smf_track = smf_track_new();
+ assert(_smf_track);
+
+ smf_add_track(_smf, _smf_track);
+ assert(_smf->number_of_tracks == 1);
}
-template<typename Time>
void
-SMF<Time>::write_chunk(const char id[4], uint32_t length, void* data)
+SMF::end_write() THROW_FILE_ERROR
{
- write_chunk_header(id, length);
-
- fwrite(data, 1, length, _fd);
+ if (smf_save(_smf, _file_path.c_str()) != 0)
+ throw FileError();
}
-/** Returns the size (in bytes) of the value written. */
-template<typename Time>
-size_t
-SMF<Time>::write_var_len(uint32_t value)
+double
+SMF::round_to_file_precision (double val) const
{
- 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;
- }
+ double div = ppqn();
- return ret;
+ return round (val * div) / div;
}
-template class SMF<double>;
} // namespace Evoral
projects / ardour.git / blobdiff