-bool
-SMFSource::removable () const
-{
- return (_flags & Removable) && ((_flags & RemoveAtDestroy) ||
- ((_flags & RemovableIfEmpty) && is_empty()));
-}
-
-int
-SMFSource::init (string pathstr, bool must_exist)
-{
- bool is_new = false;
-
- if (!find (pathstr, must_exist, is_new)) {
- cerr << "cannot find " << pathstr << " with me = " << must_exist << endl;
- return -1;
- }
-
- if (is_new && must_exist) {
- return -1;
- }
-
- assert(_name.find("/") == string::npos);
- return 0;
-}
-
-/** Attempt to open the SMF file for reading and writing.
- *
- * Currently SMFSource 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
- */
-int
-SMFSource::open()
-{
- //cerr << "Opening SMF file " << path() << " writeable: " << writable() << endl;
-
- assert(writable()); // FIXME;
-
- _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
- } 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 (_fd == 0) ? -1 : 0;
-}
-
-void
-SMFSource::close()
-{
- if (_fd) {
- flush_header();
- flush_footer();
- fclose(_fd);
- _fd = NULL;
- }
-}
-
-void
-SMFSource::seek_to_footer_position()
-{
- uint8_t buffer[4];
-
- // lets check if there is a track end marker at the end of the data
- fseek(_fd, -4, SEEK_END);
- //cerr << "SMFSource::seek_to_footer_position: At position: " << ftell(_fd);
- size_t read_bytes = fread(buffer, sizeof(uint8_t), 4, _fd);
- /*cerr << " read size: " << read_bytes << " buffer: ";
- for (size_t i=0; i < read_bytes; ++i) {
- printf("%x ", buffer[i]);
- }
- printf("\n");
- */
-
- 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);
- } else {
- // there is none, so append
- fseek(_fd, 0, SEEK_END);
- }
-}
-
-int
-SMFSource::flush_header()
-{
- // FIXME: write timeline position somehow?
-
- //cerr << path() << " SMF Flushing header\n";
-
- assert(_fd);
-
- 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);
-
- fflush(_fd);
-
- return 0;
-}
-
-int
-SMFSource::flush_footer()
-{
- //cerr << path() << " SMF Flushing footer\n";
- seek_to_footer_position();
- write_footer();
- seek_to_footer_position();
-
- return 0;
-}
-
-void
-SMFSource::write_footer()
-{
- write_var_len(0);
- char eot[3] = { 0xFF, 0x2F, 0x00 }; // end-of-track meta-event
- fwrite(eot, 1, 3, _fd);
- fflush(_fd);
-}
-
-/** Returns the offset of the first event in the file with a time past @a start,
- * relative to the start of the source.
- *
- * Returns -1 if not found.
- */
-/*
-long
-SMFSource::find_first_event_after(nframes_t start)
-{
- // FIXME: obviously this is slooow
-
- fseek(_fd, _header_size, 0);
-
- while ( ! feof(_fd) ) {
- const uint32_t delta_time = read_var_len();
-
- if (delta_time > start)
- return delta_time;
- }
-
- return -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.
- * ev.buffer must be of size ev.size, and large enough for the event. The returned event
- * 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.
- *
- * 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).
- */
-int
-SMFSource::read_event(uint32_t* delta_t, uint32_t* size, Byte** buf) const
-{
- if (feof(_fd)) {
- return -1;
- }
-
- 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;
- }
- }
-
- const int event_size = midi_event_size((unsigned char)status) + 1;
- if (event_size <= 0) {
- *size = 0;
- return 0;
- }
-
- // Make sure we have enough scratch buffer
- if (*size < (unsigned)event_size)
- *buf = (Byte*)realloc(*buf, event_size);
-
- *size = event_size;
-
- (*buf)[0] = (unsigned char)status;
- if (event_size > 1)
- fread((*buf) + 1, 1, *size - 1, _fd);
-
- /*printf("SMFSource %s read event: delta = %u, size = %u, data = ", _name.c_str(), *delta_t, *size);
- for (size_t i=0; i < *size; ++i) {
- printf("%X ", (*buf)[i]);
- }
- printf("\n");*/
-
- return (int)*size;
-}
-