#include <gtkmm2ext/utils.h>
+#include <evoral/SMFReader.hpp>
+
#include <ardour/audio_library.h>
#include <ardour/auditioner.h>
#include <ardour/audioregion.h>
#include <ardour/audiofilesource.h>
#include <ardour/smf_source.h>
-#include <ardour/smf_reader.h>
#include <ardour/region_factory.h>
#include <ardour/source_factory.h>
#include <ardour/session.h>
} else if (SMFSource::safe_file_extension (*i)) {
- SMFReader reader(*i);
+ Evoral::SMFReader reader(*i);
if (reader.num_tracks() > 1) {
multichannel = true; // "channel" == track here...
}
session_transport.cc
session_utils.cc
silentfilesource.cc
-smf_reader.cc
smf_source.cc
sndfile_helpers.cc
sndfileimportable.cc
void set_model(boost::shared_ptr<MidiModel> m) { _model = m; }
protected:
- virtual int flush_header() = 0;
- virtual int flush_footer() = 0;
+ virtual void flush_midi() = 0;
+ //virtual int flush_header() = 0;
+ //virtual int flush_footer() = 0;
virtual nframes_t read_unlocked (MidiRingBuffer& dst, nframes_t start, nframes_t cnt, nframes_t stamp_offset, nframes_t negative_stamp_offset) const = 0;
virtual nframes_t write_unlocked (MidiRingBuffer& dst, nframes_t cnt) = 0;
+++ /dev/null
-/*
- Copyright (C) 2008 Paul Davis
- Written by Dave Robillard
-
- This program 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 Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#ifndef __ardour_smf_reader_h__
-#define __ardour_smf_reader_h__
-
-#include <exception>
-#include <stdexcept>
-#include <string>
-#include <inttypes.h>
-
-namespace ARDOUR {
-
-
-/** Standard MIDI File (Type 0) Reader
- *
- * Currently this only reads SMF files with tempo-based timing.
- */
-class SMFReader {
-public:
- class PrematureEOF : public std::exception {
- const char* what() const throw() { return "Unexpected end of file"; }
- };
- class CorruptFile : public std::exception {
- const char* what() const throw() { return "Corrupted file"; }
- };
- class UnsupportedTime : public std::exception {
- const char* what() const throw() { return "Unsupported time stamp type (SMPTE)"; }
- };
-
- SMFReader(const std::string filename="");
- ~SMFReader();
-
- bool open(const std::string& filename) throw (std::logic_error, UnsupportedTime);
-
- bool seek_to_track(unsigned track) throw (std::logic_error);
-
- const std::string& filename() const { return _filename; };
-
- uint16_t type() const { return _type; }
- uint16_t ppqn() const { return _ppqn; }
- uint16_t num_tracks() const { return _num_tracks; }
-
- int read_event(size_t buf_len,
- uint8_t* buf,
- uint32_t* ev_size,
- uint32_t* ev_delta_time)
- throw (std::logic_error, PrematureEOF, CorruptFile);
-
- void close();
-
- static uint32_t read_var_len(FILE* fd) throw (PrematureEOF);
-
-protected:
- /** size of SMF header, including MTrk chunk header */
- static const uint32_t HEADER_SIZE = 22;
-
- std::string _filename;
- FILE* _fd;
- uint16_t _type;
- uint16_t _ppqn;
- uint16_t _num_tracks;
- uint32_t _track;
- uint32_t _track_size;
-};
-
-
-} // namespace ARDOUR
-
-#endif /* __ardour_smf_reader_h__ */
-
#include <time.h>
#include <ardour/midi_source.h>
+#include <evoral/SMF.hpp>
namespace Evoral { class Event; }
class MidiRingBuffer;
/** Standard Midi File (Type 0) Source */
-class SMFSource : public MidiSource {
+class SMFSource : public MidiSource, public Evoral::SMF {
public:
enum Flag {
Writable = 0x1,
int set_source_name (string newname, bool destructive);
static bool safe_file_extension (const Glib::ustring& path);
-
+
Glib::ustring path() const { return _path; }
void set_allow_remove_if_empty (bool yn);
void append_event_unlocked(EventTimeUnit unit, const Evoral::Event& ev);
- int flush_header ();
- int flush_footer ();
-
int move_to_trash (const string trash_dir_name);
- bool is_empty () const;
void mark_streaming_midi_write_started (NoteMode mode, nframes_t start_time);
void mark_streaming_write_completed ();
XMLNode& get_state ();
int set_state (const XMLNode&);
- void seek_to(nframes_t time);
-
void load_model(bool lock=true, bool force_reload=false);
void destroy_model();
- uint16_t ppqn() const { return _ppqn; }
+ void flush_midi();
private:
int init (string idstr, bool must_exist);
- nframes_t read_unlocked (MidiRingBuffer& dst, nframes_t start, nframes_t cn, nframes_t stamp_offset, nframes_t negative_stamp_offset) const;
- nframes_t write_unlocked (MidiRingBuffer& dst, nframes_t cnt);
+ nframes_t read_unlocked (
+ MidiRingBuffer& dst,
+ nframes_t start,
+ nframes_t cn,
+ nframes_t stamp_offset,
+ nframes_t negative_stamp_offset) const;
+
+ nframes_t write_unlocked (
+ MidiRingBuffer& src,
+ nframes_t cnt);
bool find (std::string path, bool must_exist, bool& is_new);
bool removable() const;
bool writable() const { return _flags & Writable; }
- int open();
- void close();
-
- /**
- * This method is only used by flush_footer() to find the right seek position
- * for the footer (at the end after recording or -4 offset ro SEEK_END
- * if a footer is already present)
- */
- void seek_to_footer_position();
-
- /**
- * write the track footer at the current seek position
- */
- void write_footer();
-
- void write_chunk_header(const char id[4], uint32_t length);
- void write_chunk(const char id[4], uint32_t length, void* data);
- size_t write_var_len(uint32_t val);
- uint32_t read_var_len() const;
- int read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf) const;
-
- static const uint16_t _ppqn = 19200;
-
Glib::ustring _path;
Flag _flags;
string _take_id;
bool _allow_remove_if_empty;
- FILE* _fd;
- double _last_ev_time; ///< last frame time written, relative to source start
- uint32_t _track_size;
- uint32_t _header_size; ///< size of SMF header, including MTrk chunk header
- bool _empty; ///< true iff file contains (non-empty) events
static string _search_path;
};
#include <pbd/basename.h>
#include <pbd/convert.h>
+#include <evoral/SMFReader.hpp>
+
#include <ardour/ardour.h>
#include <ardour/session.h>
#include <ardour/session_directory.h>
#include <ardour/resampled_source.h>
#include <ardour/sndfileimportable.h>
#include <ardour/analyser.h>
-#include <ardour/smf_reader.h>
#include <ardour/smf_source.h>
#include <ardour/tempo.h>
}
static void
-write_midi_data_to_new_files (SMFReader* source, Session::import_status& status,
+write_midi_data_to_new_files (Evoral::SMFReader* source, Session::import_status& status,
vector<boost::shared_ptr<Source> >& newfiles)
{
Evoral::Event ev(0, 0.0, 4, NULL, true);
smfs->session().tempo_map().meter_at(timeline_position));
smfs->update_length(0, (nframes_t) ceil ((t / (double)source->ppqn()) * frames_per_beat));
-
- smfs->flush_header();
- smfs->flush_footer();
+ smfs->end_write();
if (status.cancel)
break;
++p, ++cnt)
{
boost::shared_ptr<ImportableSource> source;
- std::auto_ptr<SMFReader> smf_reader;
+ std::auto_ptr<Evoral::SMFReader> smf_reader;
const DataType type = ((*p).rfind(".mid") != string::npos) ?
DataType::MIDI : DataType::AUDIO;
} else {
try {
- smf_reader = std::auto_ptr<SMFReader>(new SMFReader(*p));
+ smf_reader = std::auto_ptr<Evoral::SMFReader>(new Evoral::SMFReader(*p));
channels = smf_reader->num_tracks();
- } catch (const SMFReader::UnsupportedTime& err) {
+ } catch (const Evoral::SMFReader::UnsupportedTime& err) {
error << _("Import: unsupported MIDI time stamp format") << endmsg;
status.done = status.cancel = true;
return;
void
MidiSource::session_saved()
{
- flush_header();
- flush_footer();
+ flush_midi();
if (_model && _model->edited()) {
string newname;
newsrc->set_model(_model);
_model->set_midi_source(newsrc.get());
- newsrc->flush_header();
- newsrc->flush_footer();
+ newsrc->flush_midi();
Switched.emit(newsrc);
}
+++ /dev/null
-/*
- Copyright (C) 2008 Paul Davis
- Written by Dave Robillard
-
- This program 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 Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include <cstring>
-#include <cstdio>
-#include <cassert>
-#include <iostream>
-#include <glibmm/miscutils.h>
-#include <midi++/events.h>
-
-#include <ardour/smf_reader.h>
-#include <ardour/midi_util.h>
-
-using namespace std;
-
-namespace ARDOUR {
-
-
-SMFReader::SMFReader(const string filename)
- : _fd(NULL)
- , _ppqn(0)
- , _track(0)
- , _track_size(0)
-{
- if (filename.length() > 0) {
- open(filename);
- }
-}
-
-
-SMFReader::~SMFReader()
-{
- if (_fd)
- close();
-}
-
-
-bool
-SMFReader::open(const string& filename) throw (logic_error, UnsupportedTime)
-{
- if (_fd)
- throw logic_error("Attempt to start new read while write in progress.");
-
- cout << "Opening SMF file " << filename << " for reading." << endl;
-
- _fd = fopen(filename.c_str(), "r+");
-
- if (_fd) {
- // Read type (bytes 8..9)
- fseek(_fd, 0, SEEK_SET);
- char mthd[5];
- mthd[4] = '\0';
- fread(mthd, 1, 4, _fd);
- if (strcmp(mthd, "MThd")) {
- cerr << filename << " is not an SMF file, aborting." << endl;
- fclose(_fd);
- _fd = NULL;
- return false;
- }
-
- // Read type (bytes 8..9)
- fseek(_fd, 8, SEEK_SET);
- uint16_t type_be = 0;
- fread(&type_be, 2, 1, _fd);
- _type = GUINT16_FROM_BE(type_be);
-
- // Read number of tracks (bytes 10..11)
- uint16_t num_tracks_be = 0;
- fread(&num_tracks_be, 2, 1, _fd);
- _num_tracks = GUINT16_FROM_BE(num_tracks_be);
-
- // Read PPQN (bytes 12..13)
- uint16_t ppqn_be = 0;
- fread(&ppqn_be, 2, 1, _fd);
- _ppqn = GUINT16_FROM_BE(ppqn_be);
-
- // TODO: Absolute (SMPTE seconds) time support
- if ((_ppqn & 0x8000) != 0)
- throw UnsupportedTime();
-
- seek_to_track(1);
-
- return true;
- } else {
- return false;
- }
-}
-
-
-/** Seek to the start of a given track, starting from 1.
- * Returns true if specified track was found.
- */
-bool
-SMFReader::seek_to_track(unsigned track) throw (std::logic_error)
-{
- if (track == 0)
- throw logic_error("Seek to track 0 out of range (must be >= 1)");
-
- if (!_fd)
- throw logic_error("Attempt to seek to track on unopened SMF file.");
-
- unsigned track_pos = 0;
-
- fseek(_fd, 14, SEEK_SET);
- char id[5];
- id[4] = '\0';
- uint32_t chunk_size = 0;
-
- while (!feof(_fd)) {
- fread(id, 1, 4, _fd);
-
- if (!strcmp(id, "MTrk")) {
- ++track_pos;
- } else {
- std::cerr << "Unknown chunk ID " << id << endl;
- }
-
- uint32_t chunk_size_be;
- fread(&chunk_size_be, 4, 1, _fd);
- chunk_size = GUINT32_FROM_BE(chunk_size_be);
-
- if (track_pos == track)
- break;
-
- fseek(_fd, chunk_size, SEEK_CUR);
- }
-
- if (!feof(_fd) && track_pos == track) {
- _track = track;
- _track_size = chunk_size;
- return true;
- } else {
- return false;
- }
-}
-
-
-/** 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 (so it's the caller's responsibility
- * to keep track of delta time, even for ignored events).
- *
- * 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).
- *
- * If @a buf is not large enough to hold the event, 0 will be returned, but ev_size
- * set to the actual size of the event.
- */
-int
-SMFReader::read_event(size_t buf_len,
- uint8_t* buf,
- uint32_t* ev_size,
- uint32_t* delta_time)
- throw (std::logic_error, PrematureEOF, CorruptFile)
-{
- if (_track == 0)
- throw logic_error("Attempt to read from unopened SMF file");
-
- if (!_fd || feof(_fd)) {
- return -1;
- }
-
- assert(buf_len > 0);
- assert(buf);
- assert(ev_size);
- assert(delta_time);
-
- // Running status state
- static uint8_t last_status = 0;
- static uint32_t last_size = 0;
-
- *delta_time = read_var_len(_fd);
- int status = fgetc(_fd);
- if (status == EOF)
- throw PrematureEOF();
- else if (status > 0xFF)
- throw CorruptFile();
-
- if (status < 0x80) {
- if (last_status == 0)
- throw CorruptFile();
- status = last_status;
- *ev_size = last_size;
- fseek(_fd, -1, SEEK_CUR);
- } else {
- last_status = status;
- *ev_size = midi_event_size(status) + 1;
- last_size = *ev_size;
- }
-
- buf[0] = (uint8_t)status;
-
- if (status == 0xFF) {
- *ev_size = 0;
- if (feof(_fd))
- throw PrematureEOF();
- uint8_t type = fgetc(_fd);
- const uint32_t size = read_var_len(_fd);
- /*cerr.flags(ios::hex);
- cerr << "SMF - meta 0x" << (int)type << ", size = ";
- cerr.flags(ios::dec);
- cerr << size << endl;*/
-
- if ((uint8_t)type == 0x2F) {
- return -1; // we hit the logical EOF anyway...
- } else {
- fseek(_fd, size, SEEK_CUR);
- return 0;
- }
- }
-
- if (*ev_size > buf_len || *ev_size == 0 || feof(_fd)) {
- //cerr << "SMF - Skipping event" << endl;
- // Skip event, return 0
- fseek(_fd, *ev_size - 1, SEEK_CUR);
- return 0;
- } else {
- // Read event, return size
- if (ferror(_fd))
- throw CorruptFile();
-
- fread(buf+1, 1, *ev_size - 1, _fd);
-
- if ((buf[0] & 0xF0) == 0x90 && buf[2] == 0) {
- buf[0] = (0x80 | (buf[0] & 0x0F));
- buf[2] = 0x40;
- }
-
- return *ev_size;
- }
-}
-
-
-void
-SMFReader::close()
-{
- if (_fd)
- fclose(_fd);
-
- _fd = NULL;
-}
-
-
-uint32_t
-SMFReader::read_var_len(FILE* fd) throw (PrematureEOF)
-{
- if (feof(fd))
- throw PrematureEOF();
-
- uint32_t value;
- uint8_t c;
-
- if ( (value = getc(fd)) & 0x80 ) {
- value &= 0x7F;
- do {
- if (feof(fd))
- throw PrematureEOF();
- value = (value << 7) + ((c = getc(fd)) & 0x7F);
- } while (c & 0x80);
- }
-
- return value;
-}
-
-
-} // namespace ARDOUR
-
#include <glibmm/miscutils.h>
+#include <evoral/SMFReader.hpp>
+
#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 <ardour/smf_reader.h>
#include <ardour/event_type_map.h>
#include "i18n.h"
SMFSource::SMFSource (Session& s, std::string path, Flag flags)
: MidiSource (s, region_name_from_path(path, false))
+ , SMF ()
, _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)
- , _empty(true)
{
/* constructor used for new internal-to-session files. file cannot exist */
throw failed_constructor ();
}
- if (open()) {
+ if (open(path)) {
throw failed_constructor ();
}
: MidiSource (s, node)
, _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)
- , _empty(true)
{
/* constructor used for existing internal-to-session files. file must exist */
throw failed_constructor ();
}
- if (open()) {
+ if (open(_path)) {
throw failed_constructor ();
}
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, uint8_t** 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 = (uint8_t*)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;
-}
-
/** All stamps in audio frames */
nframes_t
SMFSource::read_unlocked (MidiRingBuffer& dst, nframes_t start, nframes_t cnt, nframes_t stamp_offset, nframes_t negative_stamp_offset) const
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, SEEK_SET);
+ SMF::seek_to_start();
// 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);
+ const uint64_t start_ticks = (uint64_t)((start / frames_per_beat) * ppqn());
- while (!feof(_fd)) {
+ while (!SMF::eof()) {
int ret = read_event(&ev_delta_t, &ev_size, &ev_buffer);
if (ret == -1) { // EOF
//cerr << "SMF - EOF\n";
if (time >= start_ticks) {
const nframes_t ev_frame_time = (nframes_t)(
- ((time / (double)_ppqn) * frames_per_beat)) + stamp_offset;
+ ((time / (double)ppqn()) * frames_per_beat)) + stamp_offset;
if (ev_frame_time <= start + cnt)
dst.write(ev_frame_time - negative_stamp_offset, ev_type, ev_size, ev_buffer);
_model->append(ev);
}
- fflush(_fd);
+ SMF::flush();
free(buf);
const nframes_t oldlen = _length;
assert(ev.time() >= 0);
- if (ev.time() < _last_ev_time) {
- cerr << "SMFSource: Warning: Skipping event with ev.time() < _last_ev_time" << endl;
+ if (ev.time() < last_event_time()) {
+ cerr << "SMFSource: Warning: Skipping event with ev.time() < last.time()" << endl;
return;
}
_session.engine().frame_rate(),
_session.tempo_map().meter_at(_timeline_position));
- delta_time = (uint32_t)((ev.time() - _last_ev_time) / frames_per_beat * _ppqn);
+ delta_time = (uint32_t)((ev.time() - last_event_time()) / frames_per_beat * ppqn());
} else {
assert(unit == Beats);
- delta_time = (uint32_t)((ev.time() - _last_ev_time) * _ppqn);
+ delta_time = (uint32_t)((ev.time() - last_event_time()) * ppqn());
}
-
- const size_t stamp_size = write_var_len(delta_time);
- fwrite(ev.buffer(), 1, ev.size(), _fd);
+ SMF::append_event_unlocked(delta_time, ev);
- _track_size += stamp_size + ev.size();
_write_data_count += ev.size();
- _last_ev_time = ev.time();
-
- if (ev.size() > 0)
- _empty = false;
}
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;
- fseek(_fd, _header_size, SEEK_SET);
+ SMF::begin_write (start_frame);
}
void
}
_model->set_edited(false);
- flush_header();
- flush_footer();
+ SMF::end_write ();
}
void
return 0;//rename_peakfile (peak_path (_path));
}
-bool
-SMFSource::is_empty () const
-{
- return _empty;
-}
-
-
-void
-SMFSource::write_chunk_header(const 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(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;
-}
-
void
SMFSource::load_model(bool lock, bool force_reload)
{
}
_model->start_write();
-
- fseek(_fd, _header_size, SEEK_SET);
+ SMF::seek_to_start();
uint64_t time = 0; /* in SMF ticks */
Evoral::Event ev;
if (ret > 0) { // didn't skip (meta) event
// make ev.time absolute time in frames
- ev.time() = time * frames_per_beat / (EventTime)_ppqn;
+ ev.time() = time * frames_per_beat / (EventTime)ppqn();
ev.set_event_type(EventTypeMap::instance().midi_event_type(buf[0]));
_model->append(ev);
}
_model.reset();
}
+void
+SMFSource::flush_midi()
+{
+ SMF::end_write();
+}
+
src/Event.cpp
src/MIDIEvent.cpp
src/Note.cpp
+src/SMF.cpp
+src/SMFReader.cpp
src/Sequence.cpp
""")
--- /dev/null
+/* This file is part of Evoral.
+ * Copyright(C) 2008 Dave Robillard <http://drobilla.net>
+ * Copyright(C) 2000-2008 Paul Davis
+ *
+ * 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
+ * Foundation; either version 2 of the License, or(at your option) any later
+ * version.
+ *
+ * Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef EVORAL_SMF_HPP
+#define EVORAL_SMF_HPP
+
+#include <string>
+#include <evoral/types.hpp>
+
+namespace Evoral {
+
+class Event;
+class EventRingBuffer;
+
+
+/** Standard Midi File (Type 0)
+ */
+class SMF {
+public:
+ SMF();
+ virtual ~SMF();
+
+ void seek_to_start() const;
+
+ uint16_t ppqn() const { return _ppqn; }
+ bool is_empty() const { return _empty; }
+ bool eof() const { return feof(_fd); }
+
+ EventTime last_event_time() const { return _last_ev_time; }
+
+ void begin_write(nframes_t start_time);
+ void append_event_unlocked(uint32_t delta_t, const Evoral::Event& ev);
+ void end_write();
+
+ void flush();
+ int flush_header();
+ int flush_footer();
+
+protected:
+ int open(const std::string& path);
+ void close();
+
+ /** Used by flush_footer() to find the position to write the footer */
+ void seek_to_footer_position();
+
+ /** Write the track footer at the current seek position */
+ void write_footer();
+
+ void write_chunk_header(const char id[4], uint32_t length);
+ void write_chunk(const char id[4], uint32_t length, void* data);
+ size_t write_var_len(uint32_t val);
+ uint32_t read_var_len() const;
+ int read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf) const;
+
+private:
+ static const uint16_t _ppqn = 19200;
+
+ FILE* _fd;
+ EventTime _last_ev_time; ///< last frame time written, relative to source start
+ uint32_t _track_size;
+ uint32_t _header_size; ///< size of SMF header, including MTrk chunk header
+ bool _empty; ///< true iff file contains(non-empty) events
+};
+
+}; /* namespace Evoral */
+
+#endif /* EVORAL_SMF_HPP */
+
--- /dev/null
+/* This file is part of Evoral.
+ * Copyright(C) 2008 Dave Robillard <http://drobilla.net>
+ * Copyright(C) 2000-2008 Paul Davis
+ *
+ * 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
+ * Foundation; either version 2 of the License, or(at your option) any later
+ * version.
+ *
+ * Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef EVORAL_SMF_READER_HPP
+#define EVORAL_SMF_READER_HPP
+
+#include <exception>
+#include <stdexcept>
+#include <string>
+#include <inttypes.h>
+
+namespace Evoral {
+
+
+/** Standard MIDI File (Type 0) Reader
+ *
+ * Currently this only reads SMF files with tempo-based timing.
+ */
+class SMFReader {
+public:
+ class PrematureEOF : public std::exception {
+ const char* what() const throw() { return "Unexpected end of file"; }
+ };
+ class CorruptFile : public std::exception {
+ const char* what() const throw() { return "Corrupted file"; }
+ };
+ class UnsupportedTime : public std::exception {
+ const char* what() const throw() { return "Unsupported time stamp type (SMPTE)"; }
+ };
+
+ SMFReader(const std::string& filename="");
+ ~SMFReader();
+
+ bool open(const std::string& filename) throw (std::logic_error, UnsupportedTime);
+
+ bool seek_to_track(unsigned track) throw (std::logic_error);
+
+ const std::string& filename() const { return _filename; };
+
+ uint16_t type() const { return _type; }
+ uint16_t ppqn() const { return _ppqn; }
+ uint16_t num_tracks() const { return _num_tracks; }
+
+ int read_event(size_t buf_len,
+ uint8_t* buf,
+ uint32_t* ev_size,
+ uint32_t* ev_delta_time)
+ throw (std::logic_error, PrematureEOF, CorruptFile);
+
+ void close();
+
+ static uint32_t read_var_len(FILE* fd) throw (PrematureEOF);
+
+protected:
+ /** size of SMF header, including MTrk chunk header */
+ static const uint32_t HEADER_SIZE = 22;
+
+ std::string _filename;
+ FILE* _fd;
+ uint16_t _type;
+ uint16_t _ppqn;
+ uint16_t _num_tracks;
+ uint32_t _track;
+ uint32_t _track_size;
+};
+
+
+} // namespace Evoral
+
+#endif // EVORAL_SMF_READER_HPP
+
--- /dev/null
+/* This file is part of Evoral.
+ * Copyright (C) 2008 Dave Robillard <http://drobilla.net>
+ * Copyright (C) 2000-2008 Paul Davis
+ *
+ * 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
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <cassert>
+#include <iostream>
+#include <glibmm/miscutils.h>
+#include <evoral/midi_util.h>
+#include <evoral/SMF.hpp>
+#include <evoral/SMFReader.hpp>
+#include <evoral/Event.hpp>
+
+using namespace std;
+
+namespace Evoral {
+
+SMF::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()
+{
+}
+
+/** 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
+ */
+int
+SMF::open(const std::string& path)
+{
+ //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
+ } 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
+SMF::close()
+{
+ if (_fd) {
+ flush_header();
+ flush_footer();
+ fclose(_fd);
+ _fd = NULL;
+ }
+}
+
+void
+SMF::seek_to_start() const
+{
+ fseek(_fd, _header_size, SEEK_SET);
+}
+
+void
+SMF::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);
+
+ 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);
+ }
+}
+
+void
+SMF::flush()
+{
+ fflush(_fd);
+}
+
+int
+SMF::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
+SMF::flush_footer()
+{
+ //cerr << path() << " SMF Flushing footer\n";
+ seek_to_footer_position();
+ write_footer();
+ seek_to_footer_position();
+
+ return 0;
+}
+
+void
+SMF::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
+SMF::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
+SMF::read_event(uint32_t* delta_t, uint32_t* size, uint8_t** 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 = (uint8_t*)realloc(*buf, event_size);
+
+ *size = event_size;
+
+ (*buf)[0] = (unsigned char)status;
+ if (event_size > 1)
+ fread((*buf) + 1, 1, *size - 1, _fd);
+
+ /*printf("SMF %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;
+}
+
+void
+SMF::append_event_unlocked(uint32_t delta_t, const Evoral::Event& ev)
+{
+ if (ev.size() == 0)
+ return;
+
+ const size_t stamp_size = write_var_len(delta_t);
+ fwrite(ev.buffer(), 1, ev.size(), _fd);
+
+ _track_size += stamp_size + ev.size();
+ _last_ev_time = ev.time();
+
+ if (ev.size() > 0)
+ _empty = false;
+}
+
+void
+SMF::begin_write(nframes_t start_frame)
+{
+ _last_ev_time = 0;
+ fseek(_fd, _header_size, SEEK_SET);
+}
+
+void
+SMF::end_write()
+{
+ flush_header();
+ flush_footer();
+}
+
+void
+SMF::write_chunk_header(const 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
+SMF::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
+SMF::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;
+}
+
+} // namespace Evoral
--- /dev/null
+/* This file is part of Evoral.
+ * Copyright(C) 2008 Dave Robillard <http://drobilla.net>
+ * Copyright(C) 2000-2008 Paul Davis
+ *
+ * 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
+ * Foundation; either version 2 of the License, or(at your option) any later
+ * version.
+ *
+ * Evoral is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <cstring>
+#include <cstdio>
+#include <cassert>
+#include <iostream>
+#include <glibmm/miscutils.h>
+
+#include <evoral/midi_util.h>
+#include <evoral/SMFReader.hpp>
+
+using namespace std;
+
+namespace Evoral {
+
+
+SMFReader::SMFReader(const string& filename)
+ : _fd(NULL)
+ , _ppqn(0)
+ , _track(0)
+ , _track_size(0)
+{
+ if (filename.length() > 0) {
+ open(filename);
+ }
+}
+
+
+SMFReader::~SMFReader()
+{
+ if (_fd)
+ close();
+}
+
+
+bool
+SMFReader::open(const string& filename) throw (logic_error, UnsupportedTime)
+{
+ if (_fd)
+ throw logic_error("Attempt to start new read while write in progress.");
+
+ cout << "Opening SMF file " << filename << " for reading." << endl;
+
+ _fd = fopen(filename.c_str(), "r+");
+
+ if (_fd) {
+ // Read type (bytes 8..9)
+ fseek(_fd, 0, SEEK_SET);
+ char mthd[5];
+ mthd[4] = '\0';
+ fread(mthd, 1, 4, _fd);
+ if (strcmp(mthd, "MThd")) {
+ cerr << filename << " is not an SMF file, aborting." << endl;
+ fclose(_fd);
+ _fd = NULL;
+ return false;
+ }
+
+ // Read type (bytes 8..9)
+ fseek(_fd, 8, SEEK_SET);
+ uint16_t type_be = 0;
+ fread(&type_be, 2, 1, _fd);
+ _type = GUINT16_FROM_BE(type_be);
+
+ // Read number of tracks (bytes 10..11)
+ uint16_t num_tracks_be = 0;
+ fread(&num_tracks_be, 2, 1, _fd);
+ _num_tracks = GUINT16_FROM_BE(num_tracks_be);
+
+ // Read PPQN (bytes 12..13)
+ uint16_t ppqn_be = 0;
+ fread(&ppqn_be, 2, 1, _fd);
+ _ppqn = GUINT16_FROM_BE(ppqn_be);
+
+ // TODO: Absolute (SMPTE seconds) time support
+ if ((_ppqn & 0x8000) != 0)
+ throw UnsupportedTime();
+
+ seek_to_track(1);
+
+ return true;
+ } else {
+ return false;
+ }
+}
+
+
+/** Seek to the start of a given track, starting from 1.
+ * Returns true if specified track was found.
+ */
+bool
+SMFReader::seek_to_track(unsigned track) throw (std::logic_error)
+{
+ if (track == 0)
+ throw logic_error("Seek to track 0 out of range (must be >= 1)");
+
+ if (!_fd)
+ throw logic_error("Attempt to seek to track on unopened SMF file.");
+
+ unsigned track_pos = 0;
+
+ fseek(_fd, 14, SEEK_SET);
+ char id[5];
+ id[4] = '\0';
+ uint32_t chunk_size = 0;
+
+ while (!feof(_fd)) {
+ fread(id, 1, 4, _fd);
+
+ if (!strcmp(id, "MTrk")) {
+ ++track_pos;
+ } else {
+ std::cerr << "Unknown chunk ID " << id << endl;
+ }
+
+ uint32_t chunk_size_be;
+ fread(&chunk_size_be, 4, 1, _fd);
+ chunk_size = GUINT32_FROM_BE(chunk_size_be);
+
+ if (track_pos == track)
+ break;
+
+ fseek(_fd, chunk_size, SEEK_CUR);
+ }
+
+ if (!feof(_fd) && track_pos == track) {
+ _track = track;
+ _track_size = chunk_size;
+ return true;
+ } else {
+ return false;
+ }
+}
+
+
+/** 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 (so it's the caller's responsibility
+ * to keep track of delta time, even for ignored events).
+ *
+ * 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).
+ *
+ * If @a buf is not large enough to hold the event, 0 will be returned, but ev_size
+ * set to the actual size of the event.
+ */
+int
+SMFReader::read_event(size_t buf_len,
+ uint8_t* buf,
+ uint32_t* ev_size,
+ uint32_t* delta_time)
+ throw (std::logic_error, PrematureEOF, CorruptFile)
+{
+ if (_track == 0)
+ throw logic_error("Attempt to read from unopened SMF file");
+
+ if (!_fd || feof(_fd)) {
+ return -1;
+ }
+
+ assert(buf_len > 0);
+ assert(buf);
+ assert(ev_size);
+ assert(delta_time);
+
+ // Running status state
+ static uint8_t last_status = 0;
+ static uint32_t last_size = 0;
+
+ *delta_time = read_var_len(_fd);
+ int status = fgetc(_fd);
+ if (status == EOF)
+ throw PrematureEOF();
+ else if (status > 0xFF)
+ throw CorruptFile();
+
+ if (status < 0x80) {
+ if (last_status == 0)
+ throw CorruptFile();
+ status = last_status;
+ *ev_size = last_size;
+ fseek(_fd, -1, SEEK_CUR);
+ } else {
+ last_status = status;
+ *ev_size = midi_event_size(status) + 1;
+ last_size = *ev_size;
+ }
+
+ buf[0] = (uint8_t)status;
+
+ if (status == 0xFF) {
+ *ev_size = 0;
+ if (feof(_fd))
+ throw PrematureEOF();
+ uint8_t type = fgetc(_fd);
+ const uint32_t size = read_var_len(_fd);
+ /*cerr.flags(ios::hex);
+ cerr << "SMF - meta 0x" << (int)type << ", size = ";
+ cerr.flags(ios::dec);
+ cerr << size << endl;*/
+
+ if ((uint8_t)type == 0x2F) {
+ return -1; // we hit the logical EOF anyway...
+ } else {
+ fseek(_fd, size, SEEK_CUR);
+ return 0;
+ }
+ }
+
+ if (*ev_size > buf_len || *ev_size == 0 || feof(_fd)) {
+ //cerr << "SMF - Skipping event" << endl;
+ // Skip event, return 0
+ fseek(_fd, *ev_size - 1, SEEK_CUR);
+ return 0;
+ } else {
+ // Read event, return size
+ if (ferror(_fd))
+ throw CorruptFile();
+
+ fread(buf+1, 1, *ev_size - 1, _fd);
+
+ if ((buf[0] & 0xF0) == 0x90 && buf[2] == 0) {
+ buf[0] = (0x80 | (buf[0] & 0x0F));
+ buf[2] = 0x40;
+ }
+
+ return *ev_size;
+ }
+}
+
+
+void
+SMFReader::close()
+{
+ if (_fd)
+ fclose(_fd);
+
+ _fd = NULL;
+}
+
+
+uint32_t
+SMFReader::read_var_len(FILE* fd) throw (PrematureEOF)
+{
+ if (feof(fd))
+ throw PrematureEOF();
+
+ uint32_t value;
+ uint8_t c;
+
+ if ( (value = getc(fd)) & 0x80 ) {
+ value &= 0x7F;
+ do {
+ if (feof(fd))
+ throw PrematureEOF();
+ value = (value << 7) + ((c = getc(fd)) & 0x7F);
+ } while (c & 0x80);
+ }
+
+ return value;
+}
+
+
+} // namespace Evoral
+
projects / ardour.git / commitdiff