#include <ardour/smf_source.h>
#include <ardour/session.h>
+#include <ardour/midi_ring_buffer.h>
+#include <ardour/midi_util.h>
+#include <ardour/tempo.h>
+#include <ardour/audioengine.h>
#include "i18n.h"
uint64_t SMFSource::header_position_offset;
*/
-SMFSource::SMFSource (std::string path, Flag flags)
- : MidiSource (path), _flags (flags)
+SMFSource::SMFSource (Session& s, std::string path, Flag flags)
+ : MidiSource (s, region_name_from_path(path, false))
+ , _channel(0)
+ , _flags (Flag(flags | Writable)) // FIXME: this needs to be writable for now
+ , _allow_remove_if_empty(true)
+ , _fd (0)
+ , _last_ev_time(0)
+ , _track_size(4) // 4 bytes for the ever-present EOT event
+ , _header_size(22)
{
/* constructor used for new internal-to-session files. file cannot exist */
throw failed_constructor ();
}
- SourceCreated (this); /* EMIT SIGNAL */
+ if (open()) {
+ throw failed_constructor ();
+ }
+
+ //cerr << "SMF Source path: " << path << endl;
+
+ assert(_name.find("/") == string::npos);
}
-SMFSource::SMFSource (const XMLNode& node)
- : MidiSource (node), _flags (Flag (Writable|CanRename))
+SMFSource::SMFSource (Session& s, const XMLNode& node)
+ : MidiSource (s, node)
+ , _channel(0)
+ , _flags (Flag (Writable|CanRename))
+ , _allow_remove_if_empty(true)
+ , _fd (0)
+ , _last_ev_time(0)
+ , _track_size(4) // 4 bytes for the ever-present EOT event
+ , _header_size(22)
{
/* constructor used for existing internal-to-session files. file must exist */
throw failed_constructor ();
}
- SourceCreated (this); /* EMIT SIGNAL */
+ if (open()) {
+ throw failed_constructor ();
+ }
+
+ //cerr << "SMF Source name: " << _name << endl;
+
+ assert(_name.find("/") == string::npos);
}
SMFSource::~SMFSource ()
SMFSource::removable () const
{
return (_flags & Removable) && ((_flags & RemoveAtDestroy) ||
- ((_flags & RemovableIfEmpty) && is_empty (_path)));
+ ((_flags & RemovableIfEmpty) && is_empty()));
}
int
{
bool is_new = false;
- _length = 1024; // FIXME FIXME FIXME: force save
-
- /*
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;
}
- */
-
- // Yeah, we sound it. Swear.
+ assert(_name.find("/") == string::npos);
return 0;
}
int
-SMFSource::update_header (jack_nframes_t when, struct tm&, time_t)
+SMFSource::open()
{
- return 0;
+ //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);
+ //cerr << "SMF - read track size " << _track_size << endl;
+
+ // We're making a new file
+ } else {
+ _fd = fopen(path().c_str(), "w+");
+ _track_size = 4;
+
+ // Write a tentative header just to pad things out so writing happens in the right spot
+ flush_header();
+ write_footer();
+ seek_to_end();
+ }
+
+ return (_fd == 0) ? -1 : 0;
+}
+
+void
+SMFSource::seek_to_end()
+{
+ fseek(_fd, -4, SEEK_END);
}
int
SMFSource::flush_header ()
{
+ // FIXME: write timeline position somehow?
+
+ //cerr << "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 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, 0);
+ write_chunk("MThd", 6, data);
+ //if (_track_size > 0) {
+ write_chunk_header("MTrk", _track_size);
+ //}
+
+ fflush(_fd);
+
return 0;
}
-jack_nframes_t
-SMFSource::read_unlocked (RawMidi* dst, jack_nframes_t start, jack_nframes_t cnt) const
+int
+SMFSource::flush_footer()
{
+ seek_to_end();
+ write_footer();
+ seek_to_end();
+
return 0;
}
-jack_nframes_t
-SMFSource::write_unlocked (RawMidi* dst, jack_nframes_t cnt)
+void
+SMFSource::write_footer()
{
- return 0;
+ //cerr << "SMF " << name() << " writing EOT at byte " << ftell(_fd) << endl;
+
+ 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);
+
+ *delta_t = read_var_len();
+ assert(!feof(_fd));
+
+ const int status = fgetc(_fd);
+ assert(status != EOF); // FIXME die gracefully
+
+ //printf("Status @ %X = %X\n", (unsigned)ftell(_fd) - 1, status);
+
+ if (status == 0xFF) {
+ assert(!feof(_fd));
+ const int type = fgetc(_fd);
+ if ((unsigned char)type == 0x2F) {
+ //cerr << _name << " hit EOT" << endl;
+ return -1;
+ } 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;
+
+ /*if (ev.buffer == NULL)
+ ev.buffer = (Byte*)malloc(sizeof(Byte) * ev.size);*/
+
+ (*buf)[0] = (unsigned char)status;
+ if (event_size > 1)
+ fread((*buf) + 1, 1, *size - 1, _fd);
+
+ /*printf("%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;
}
+/** All stamps in audio frames */
+nframes_t
+SMFSource::read_unlocked (MidiRingBuffer& dst, nframes_t start, nframes_t cnt, nframes_t stamp_offset) const
+{
+ //cerr << "SMF " << name() << " read " << start << ", count=" << cnt << ", offset=" << stamp_offset << endl;
+
+ // 64 bits ought to be enough for anybody
+ uint64_t time = 0; // in SMF ticks, 1 tick per _ppqn
+
+ _read_data_count = 0;
+
+ // Output parameters for read_event (which will allocate scratch in buffer as needed)
+ uint32_t ev_delta_t = 0;
+ uint32_t ev_size = 0;
+ Byte* ev_buffer = 0;
+
+ size_t scratch_size = 0; // keep track of scratch to minimize reallocs
+
+ // FIXME: don't seek to start and search every read (brutal!)
+ fseek(_fd, _header_size, 0);
+
+ // FIXME: assumes tempo never changes after start
+ const double frames_per_beat = _session.tempo_map().tempo_at(_timeline_position).frames_per_beat(
+ _session.engine().frame_rate(),
+ _session.tempo_map().meter_at(_timeline_position));
+
+ const uint64_t start_ticks = (uint64_t)((start / frames_per_beat) * _ppqn);
+
+ while (!feof(_fd)) {
+ int ret = read_event(&ev_delta_t, &ev_size, &ev_buffer);
+ if (ret == -1) { // EOF
+ //cerr << "SMF - EOF\n";
+ break;
+ }
+
+ if (ret == 0) { // meta-event (skipped)
+ //cerr << "SMF - META\n";
+ time += ev_delta_t; // just accumulate delta time and ignore event
+ continue;
+ }
+
+ time += ev_delta_t; // accumulate delta time
+
+ if (time >= start_ticks) {
+ const nframes_t ev_frame_time = (nframes_t)(
+ ((time / (double)_ppqn) * frames_per_beat)) + stamp_offset;
+
+ if (ev_frame_time <= start + cnt)
+ dst.write(ev_frame_time, ev_size, ev_buffer);
+ else
+ break;
+ }
+
+ _read_data_count += ev_size;
+
+ if (ev_size > scratch_size)
+ scratch_size = ev_size;
+ else
+ ev_size = scratch_size; // minimize realloc in read_event
+ }
+
+ return cnt;
+}
+
+/** All stamps in audio frames */
+nframes_t
+SMFSource::write_unlocked (MidiRingBuffer& src, nframes_t cnt)
+{
+ _write_data_count = 0;
+
+ double time;
+ size_t size;
+
+ size_t buf_capacity = 4;
+ Byte* buf = (Byte*)malloc(buf_capacity);
+
+ if (_model && ! _model->writing())
+ _model->start_write();
+
+ while (true) {
+ bool ret = src.full_peek(sizeof(double), (Byte*)&time);
+ if (!ret || time - _timeline_position > _length + cnt)
+ break;
+
+ ret = src.read_prefix(&time, &size);
+ if (!ret)
+ break;
+
+ if (size > buf_capacity) {
+ buf_capacity = size;
+ buf = (Byte*)realloc(buf, size);
+ }
+
+ ret = src.read_contents(size, buf);
+ if (!ret) {
+ cerr << "ERROR: Read time/size but not buffer, corrupt MIDI ring buffer" << endl;
+ break;
+ }
+
+ assert(time >= _timeline_position);
+ time -= _timeline_position;
+
+ const MidiEvent ev(time, size, buf);
+ append_event_unlocked(ev);
+
+ if (_model)
+ _model->append(ev);
+ }
+
+ fflush(_fd);
+ free(buf);
+
+ const nframes_t oldlen = _length;
+ update_length(oldlen, cnt);
+
+ ViewDataRangeReady (_timeline_position + oldlen, cnt); /* EMIT SIGNAL */
+
+ return cnt;
+}
+
+
+void
+SMFSource::append_event_unlocked(const MidiEvent& ev)
+{
+ /*printf("SMF - writing event, time = %lf, size = %u, data = ", ev.time(), ev.size());
+ for (size_t i=0; i < ev.size(); ++i) {
+ printf("%X ", ev.buffer()[i]);
+ }
+ printf("\n");*/
+
+ assert(ev.time() >= 0);
+
+ assert(ev.time() >= _last_ev_time);
+
+ // FIXME: assumes tempo never changes after start
+ const double frames_per_beat = _session.tempo_map().tempo_at(_timeline_position).frames_per_beat(
+ _session.engine().frame_rate(),
+ _session.tempo_map().meter_at(_timeline_position));
+
+ const uint32_t delta_time = (uint32_t)((ev.time() - _last_ev_time) / frames_per_beat * _ppqn);
+
+ const size_t stamp_size = write_var_len(delta_time);
+ fwrite(ev.buffer(), 1, ev.size(), _fd);
+
+ _track_size += stamp_size + ev.size();
+ _write_data_count += ev.size();
+
+ _last_ev_time = ev.time();
+}
+
+
XMLNode&
SMFSource::get_state ()
{
}
+ assert(_name.find("/") == string::npos);
+
return 0;
}
_flags = Flag (_flags | RemoveAtDestroy);
}
+void
+SMFSource::mark_streaming_midi_write_started (NoteMode mode, nframes_t start_frame)
+{
+ MidiSource::mark_streaming_midi_write_started (mode, start_frame);
+ _last_ev_time = 0;
+}
+
void
SMFSource::mark_streaming_write_completed ()
{
+ MidiSource::mark_streaming_write_completed();
+
if (!writable()) {
return;
}
+
+ flush_header();
+ flush_footer();
+
#if 0
Glib::Mutex::Lock lm (_lock);
}
/* don't move the file across filesystems, just
- stick it in the `trash_dir_name' directory
+ stick it in the 'trash_dir_name' directory
on whichever filesystem it was already on.
*/
}
if (::rename (_path.c_str(), newpath.c_str()) != 0) {
- PBD::error << string_compose (_("cannot rename audio file source from %1 to %2 (%3)"),
+ PBD::error << string_compose (_("cannot rename midi file source from %1 to %2 (%3)"),
_path, newpath, strerror (errno))
<< endmsg;
return -1;
}
int
-SMFSource::set_name (string newname, bool destructive)
+SMFSource::set_source_name (string newname, bool destructive)
{
//Glib::Mutex::Lock lm (_lock); FIXME
string oldpath = _path;
- string newpath = Session::change_audio_path_by_name (oldpath, _name, newname, destructive);
+ 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 audio path") << endmsg;
+ 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 audio file for %1 to %2"), _name, newpath) << endmsg;
+ PBD::error << string_compose (_("cannot rename midi file for %1 to %2"), _name, newpath) << endmsg;
return -1;
}
}
bool
-SMFSource::is_empty (string path)
+SMFSource::is_empty () const
+{
+ bool ret = (_track_size > 4);
+
+ //cerr << name() << " IS EMPTY: " << ret << endl;
+
+ return ret;
+}
+
+
+void
+SMFSource::write_chunk_header(const char id[4], uint32_t length)
{
- /* XXX fix me */
+ const uint32_t length_be = GUINT32_TO_BE(length);
- return false;
+ fwrite(id, 1, 4, _fd);
+ fwrite(&length_be, 4, 1, _fd);
+}
+
+void
+SMFSource::write_chunk(const 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));
+
+ 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;
+}
+
+void
+SMFSource::load_model(bool lock, bool force_reload)
+{
+ if (_writing)
+ return;
+
+ if (lock)
+ Glib::Mutex::Lock lm (_lock);
+
+ if (_model && !force_reload && !_model->empty()) {
+ //cerr << _name << " NOT reloading model " << _model.get() << " (" << _model->n_notes()
+ // << " notes)" << endl;
+ return;
+ } else {
+ cerr << _name << " loading model" << endl;
+ }
+
+ if (! _model) {
+ _model = boost::shared_ptr<MidiModel>(new MidiModel(_session));
+ cerr << _name << " loaded new model " << _model.get() << endl;
+ } else {
+ cerr << _name << " reloading model " << _model.get()
+ << " (" << _model->n_notes() << " notes)" <<endl;
+ _model->clear();
+ }
+
+ _model->start_write();
+
+ fseek(_fd, _header_size, 0);
+
+ uint64_t time = 0; /* in SMF ticks */
+ MidiEvent ev;
+
+ size_t scratch_size = 0; // keep track of scratch and minimize reallocs
+
+ // FIXME: assumes tempo never changes after start
+ const double frames_per_beat = _session.tempo_map().tempo_at(_timeline_position).frames_per_beat(
+ _session.engine().frame_rate(),
+ _session.tempo_map().meter_at(_timeline_position));
+
+ uint32_t delta_t = 0;
+ int ret;
+ while ((ret = read_event(&delta_t, &ev.size(), &ev.buffer())) >= 0) {
+
+ time += delta_t;
+
+ if (ret > 0) { // didn't skip (meta) event
+ // make ev.time absolute time in frames
+ ev.time() = (double)time * frames_per_beat / (double)_ppqn;
+
+ _model->append(ev);
+ }
+
+ if (ev.size() > scratch_size)
+ scratch_size = ev.size();
+ else
+ ev.size() = scratch_size;
+ }
+
+ _model->end_write(false);
+
+ free(ev.buffer());
+}
+
+
+void
+SMFSource::destroy_model()
+{
+ //cerr << _name << " destroying model " << _model.get() << endl;
+ _model.reset();
}
projects / ardour.git / blobdiff