diff --git "a/midi_to_colab_audio.py" "b/midi_to_colab_audio.py" new file mode 100644--- /dev/null +++ "b/midi_to_colab_audio.py" @@ -0,0 +1,3090 @@ +r'''#=================================================================================================================== +# +# MIDI to Colab AUdio Python Module +# +# Converts any MIDI file to raw audio which is compatible +# with Google Colab or HUgging Face Gradio +# +# Version 1.0 +# +# Includes full source code of MIDI, pyfluidsynth, and midi_synthesizer Python modules +# +# Original source code for all modules was retrieved on 10/23/2023 +# +# Project Los Angeles +# Tegridy Code 2023 +# +#=================================================================================================================== +# +# Critical dependencies +# +# pip install numpy +# sudo apt install fluidsynth +# +#=================================================================================================================== +# +# Example usage: +# +# from midi_to_colab_audio import midi_to_colab_audio +# from IPython.display import display, Audio +# +# raw_audio = midi_to_colab_audio('/content/input.mid') +# +# display(Audio(raw_audio, rate=16000, normalize=False)) +# +#=================================================================================================================== +#! /usr/bin/python3 +# unsupported 20091104 ... +# ['set_sequence_number', dtime, sequence] +# ['raw_data', dtime, raw] + +# 20150914 jimbo1qaz MIDI.py str/bytes bug report +# I found a MIDI file which had Shift-JIS titles. When midi.py decodes it as +# latin-1, it produces a string which cannot even be accessed without raising +# a UnicodeDecodeError. Maybe, when converting raw byte strings from MIDI, +# you should keep them as bytes, not improperly decode them. However, this +# would change the API. (ie: text = a "string" ? of 0 or more bytes). It +# could break compatiblity, but there's not much else you can do to fix the bug +# https://en.wikipedia.org/wiki/Shift_JIS + +This module offers functions: concatenate_scores(), grep(), +merge_scores(), mix_scores(), midi2opus(), midi2score(), opus2midi(), +opus2score(), play_score(), score2midi(), score2opus(), score2stats(), +score_type(), segment(), timeshift() and to_millisecs(), +where "midi" means the MIDI-file bytes (as can be put in a .mid file, +or piped into aplaymidi), and "opus" and "score" are list-structures +as inspired by Sean Burke's MIDI-Perl CPAN module. + +Warning: Version 6.4 is not necessarily backward-compatible with +previous versions, in that text-data is now bytes, not strings. +This reflects the fact that many MIDI files have text data in +encodings other that ISO-8859-1, for example in Shift-JIS. + +Download MIDI.py from http://www.pjb.com.au/midi/free/MIDI.py +and put it in your PYTHONPATH. MIDI.py depends on Python3. + +There is also a call-compatible translation into Lua of this +module: see http://www.pjb.com.au/comp/lua/MIDI.html + +Backup web site: https://peterbillam.gitlab.io/miditools/ + +The "opus" is a direct translation of the midi-file-events, where +the times are delta-times, in ticks, since the previous event. + +The "score" is more human-centric; it uses absolute times, and +combines the separate note_on and note_off events into one "note" +event, with a duration: + ['note', start_time, duration, channel, note, velocity] # in a "score" + + EVENTS (in an "opus" structure) + ['note_off', dtime, channel, note, velocity] # in an "opus" + ['note_on', dtime, channel, note, velocity] # in an "opus" + ['key_after_touch', dtime, channel, note, velocity] + ['control_change', dtime, channel, controller(0-127), value(0-127)] + ['patch_change', dtime, channel, patch] + ['channel_after_touch', dtime, channel, velocity] + ['pitch_wheel_change', dtime, channel, pitch_wheel] + ['text_event', dtime, text] + ['copyright_text_event', dtime, text] + ['track_name', dtime, text] + ['instrument_name', dtime, text] + ['lyric', dtime, text] + ['marker', dtime, text] + ['cue_point', dtime, text] + ['text_event_08', dtime, text] + ['text_event_09', dtime, text] + ['text_event_0a', dtime, text] + ['text_event_0b', dtime, text] + ['text_event_0c', dtime, text] + ['text_event_0d', dtime, text] + ['text_event_0e', dtime, text] + ['text_event_0f', dtime, text] + ['end_track', dtime] + ['set_tempo', dtime, tempo] + ['smpte_offset', dtime, hr, mn, se, fr, ff] + ['time_signature', dtime, nn, dd, cc, bb] + ['key_signature', dtime, sf, mi] + ['sequencer_specific', dtime, raw] + ['raw_meta_event', dtime, command(0-255), raw] + ['sysex_f0', dtime, raw] + ['sysex_f7', dtime, raw] + ['song_position', dtime, song_pos] + ['song_select', dtime, song_number] + ['tune_request', dtime] + + DATA TYPES + channel = a value 0 to 15 + controller = 0 to 127 (see http://www.pjb.com.au/muscript/gm.html#cc ) + dtime = time measured in "ticks", 0 to 268435455 + velocity = a value 0 (soft) to 127 (loud) + note = a value 0 to 127 (middle-C is 60) + patch = 0 to 127 (see http://www.pjb.com.au/muscript/gm.html ) + pitch_wheel = a value -8192 to 8191 (0x1FFF) + raw = bytes, of length 0 or more (for sysex events see below) + sequence_number = a value 0 to 65,535 (0xFFFF) + song_pos = a value 0 to 16,383 (0x3FFF) + song_number = a value 0 to 127 + tempo = microseconds per crochet (quarter-note), 0 to 16777215 + text = bytes, of length 0 or more + ticks = the number of ticks per crochet (quarter-note) + + In sysex_f0 events, the raw data must not start with a \xF0 byte, + since this gets added automatically; + but it must end with an explicit \xF7 byte! + In the very unlikely case that you ever need to split sysex data + into one sysex_f0 followed by one or more sysex_f7s, then only the + last of those sysex_f7 events must end with the explicit \xF7 byte + (again, the raw data of individual sysex_f7 events must not start + with any \xF7 byte, since this gets added automatically). + + Since version 6.4, text data is in bytes, not in a ISO-8859-1 string. + + + GOING THROUGH A SCORE WITHIN A PYTHON PROGRAM + channels = {2,3,5,8,13} + itrack = 1 # skip 1st element which is ticks + while itrack < len(score): + for event in score[itrack]: + if event[0] == 'note': # for example, + pass # do something to all notes + # or, to work on events in only particular channels... + channel_index = MIDI.Event2channelindex.get(event[0], False) + if channel_index and (event[channel_index] in channels): + pass # do something to channels 2,3,5,8 and 13 + itrack += 1 + +''' + +import sys, struct, copy +# sys.stdout = os.fdopen(sys.stdout.fileno(), 'wb') +Version = '6.7' +VersionDate = '20201120' +# 20201120 6.7 call to bytest() removed, and protect _unshift_ber_int +# 20160702 6.6 to_millisecs() now handles set_tempo across multiple Tracks +# 20150921 6.5 segment restores controllers as well as patch and tempo +# 20150914 6.4 text data is bytes or bytearray, not ISO-8859-1 strings +# 20150628 6.3 absent any set_tempo, default is 120bpm (see MIDI file spec 1.1) +# 20150101 6.2 all text events can be 8-bit; let user get the right encoding +# 20141231 6.1 fix _some_text_event; sequencer_specific data can be 8-bit +# 20141230 6.0 synth_specific data can be 8-bit +# 20120504 5.9 add the contents of mid_opus_tracks() +# 20120208 5.8 fix num_notes_by_channel() ; should be a dict +# 20120129 5.7 _encode handles empty tracks; score2stats num_notes_by_channel +# 20111111 5.6 fix patch 45 and 46 in Number2patch, should be Harp +# 20110129 5.5 add mix_opus_tracks() and event2alsaseq() +# 20110126 5.4 "previous message repeated N times" to save space on stderr +# 20110125 5.2 opus2score terminates unended notes at the end of the track +# 20110124 5.1 the warnings in midi2opus display track_num +# 21110122 5.0 if garbage, midi2opus returns the opus so far +# 21110119 4.9 non-ascii chars stripped out of the text_events +# 21110110 4.8 note_on with velocity=0 treated as a note-off +# 21110108 4.6 unknown F-series event correctly eats just one byte +# 21011010 4.2 segment() uses start_time, end_time named params +# 21011005 4.1 timeshift() must not pad the set_tempo command +# 21011003 4.0 pitch2note_event must be chapitch2note_event +# 21010918 3.9 set_sequence_number supported, FWIW +# 20100913 3.7 many small bugfixes; passes all tests +# 20100910 3.6 concatenate_scores enforce ticks=1000, just like merge_scores +# 20100908 3.5 minor bugs fixed in score2stats +# 20091104 3.4 tune_request now supported +# 20091104 3.3 fixed bug in decoding song_position and song_select +# 20091104 3.2 unsupported: set_sequence_number tune_request raw_data +# 20091101 3.1 document how to traverse a score within Python +# 20091021 3.0 fixed bug in score2stats detecting GM-mode = 0 +# 20091020 2.9 score2stats reports GM-mode and bank msb,lsb events +# 20091019 2.8 in merge_scores, channel 9 must remain channel 9 (in GM) +# 20091018 2.7 handles empty tracks gracefully +# 20091015 2.6 grep() selects channels +# 20091010 2.5 merge_scores reassigns channels to avoid conflicts +# 20091010 2.4 fixed bug in to_millisecs which now only does opusses +# 20091010 2.3 score2stats returns channels & patch_changes, by_track & total +# 20091010 2.2 score2stats() returns also pitches and percussion dicts +# 20091010 2.1 bugs: >= not > in segment, to notice patch_change at time 0 +# 20091010 2.0 bugs: spurious pop(0) ( in _decode sysex +# 20091008 1.9 bugs: ISO decoding in sysex; str( not int( in note-off warning +# 20091008 1.8 add concatenate_scores() +# 20091006 1.7 score2stats() measures nticks and ticks_per_quarter +# 20091004 1.6 first mix_scores() and merge_scores() +# 20090424 1.5 timeshift() bugfix: earliest only sees events after from_time +# 20090330 1.4 timeshift() has also a from_time argument +# 20090322 1.3 timeshift() has also a start_time argument +# 20090319 1.2 add segment() and timeshift() +# 20090301 1.1 add to_millisecs() + +_previous_warning = '' # 5.4 +_previous_times = 0 # 5.4 +#------------------------------- Encoding stuff -------------------------- + +def opus2midi(opus=[]): + r'''The argument is a list: the first item in the list is the "ticks" +parameter, the others are the tracks. Each track is a list +of midi-events, and each event is itself a list; see above. +opus2midi() returns a bytestring of the MIDI, which can then be +written either to a file opened in binary mode (mode='wb'), +or to stdout by means of: sys.stdout.buffer.write() + +my_opus = [ + 96, + [ # track 0: + ['patch_change', 0, 1, 8], # and these are the events... + ['note_on', 5, 1, 25, 96], + ['note_off', 96, 1, 25, 0], + ['note_on', 0, 1, 29, 96], + ['note_off', 96, 1, 29, 0], + ], # end of track 0 +] +my_midi = opus2midi(my_opus) +sys.stdout.buffer.write(my_midi) +''' + if len(opus) < 2: + opus=[1000, [],] + tracks = copy.deepcopy(opus) + ticks = int(tracks.pop(0)) + ntracks = len(tracks) + if ntracks == 1: + format = 0 + else: + format = 1 + + my_midi = b"MThd\x00\x00\x00\x06"+struct.pack('>HHH',format,ntracks,ticks) + for track in tracks: + events = _encode(track) + my_midi += b'MTrk' + struct.pack('>I',len(events)) + events + _clean_up_warnings() + return my_midi + + +def score2opus(score=None): + r''' +The argument is a list: the first item in the list is the "ticks" +parameter, the others are the tracks. Each track is a list +of score-events, and each event is itself a list. A score-event +is similar to an opus-event (see above), except that in a score: + 1) the times are expressed as an absolute number of ticks + from the track's start time + 2) the pairs of 'note_on' and 'note_off' events in an "opus" + are abstracted into a single 'note' event in a "score": + ['note', start_time, duration, channel, pitch, velocity] +score2opus() returns a list specifying the equivalent "opus". + +my_score = [ + 96, + [ # track 0: + ['patch_change', 0, 1, 8], + ['note', 5, 96, 1, 25, 96], + ['note', 101, 96, 1, 29, 96] + ], # end of track 0 +] +my_opus = score2opus(my_score) +''' + if len(score) < 2: + score=[1000, [],] + tracks = copy.deepcopy(score) + ticks = int(tracks.pop(0)) + opus_tracks = [] + for scoretrack in tracks: + time2events = dict([]) + for scoreevent in scoretrack: + if scoreevent[0] == 'note': + note_on_event = ['note_on',scoreevent[1], + scoreevent[3],scoreevent[4],scoreevent[5]] + note_off_event = ['note_off',scoreevent[1]+scoreevent[2], + scoreevent[3],scoreevent[4],scoreevent[5]] + if time2events.get(note_on_event[1]): + time2events[note_on_event[1]].append(note_on_event) + else: + time2events[note_on_event[1]] = [note_on_event,] + if time2events.get(note_off_event[1]): + time2events[note_off_event[1]].append(note_off_event) + else: + time2events[note_off_event[1]] = [note_off_event,] + continue + if time2events.get(scoreevent[1]): + time2events[scoreevent[1]].append(scoreevent) + else: + time2events[scoreevent[1]] = [scoreevent,] + + sorted_times = [] # list of keys + for k in time2events.keys(): + sorted_times.append(k) + sorted_times.sort() + + sorted_events = [] # once-flattened list of values sorted by key + for time in sorted_times: + sorted_events.extend(time2events[time]) + + abs_time = 0 + for event in sorted_events: # convert abs times => delta times + delta_time = event[1] - abs_time + abs_time = event[1] + event[1] = delta_time + opus_tracks.append(sorted_events) + opus_tracks.insert(0,ticks) + _clean_up_warnings() + return opus_tracks + +def score2midi(score=None): + r''' +Translates a "score" into MIDI, using score2opus() then opus2midi() +''' + return opus2midi(score2opus(score)) + +#--------------------------- Decoding stuff ------------------------ + +def midi2opus(midi=b''): + r'''Translates MIDI into a "opus". For a description of the +"opus" format, see opus2midi() +''' + my_midi=bytearray(midi) + if len(my_midi) < 4: + _clean_up_warnings() + return [1000,[],] + id = bytes(my_midi[0:4]) + if id != b'MThd': + _warn("midi2opus: midi starts with "+str(id)+" instead of 'MThd'") + _clean_up_warnings() + return [1000,[],] + [length, format, tracks_expected, ticks] = struct.unpack( + '>IHHH', bytes(my_midi[4:14])) + if length != 6: + _warn("midi2opus: midi header length was "+str(length)+" instead of 6") + _clean_up_warnings() + return [1000,[],] + my_opus = [ticks,] + my_midi = my_midi[14:] + track_num = 1 # 5.1 + while len(my_midi) >= 8: + track_type = bytes(my_midi[0:4]) + if track_type != b'MTrk': + _warn('midi2opus: Warning: track #'+str(track_num)+' type is '+str(track_type)+" instead of b'MTrk'") + [track_length] = struct.unpack('>I', my_midi[4:8]) + my_midi = my_midi[8:] + if track_length > len(my_midi): + _warn('midi2opus: track #'+str(track_num)+' length '+str(track_length)+' is too large') + _clean_up_warnings() + return my_opus # 5.0 + my_midi_track = my_midi[0:track_length] + my_track = _decode(my_midi_track) + my_opus.append(my_track) + my_midi = my_midi[track_length:] + track_num += 1 # 5.1 + _clean_up_warnings() + return my_opus + +def opus2score(opus=[]): + r'''For a description of the "opus" and "score" formats, +see opus2midi() and score2opus(). +''' + if len(opus) < 2: + _clean_up_warnings() + return [1000,[],] + tracks = copy.deepcopy(opus) # couple of slices probably quicker... + ticks = int(tracks.pop(0)) + score = [ticks,] + for opus_track in tracks: + ticks_so_far = 0 + score_track = [] + chapitch2note_on_events = dict([]) # 4.0 + for opus_event in opus_track: + ticks_so_far += opus_event[1] + if opus_event[0] == 'note_off' or (opus_event[0] == 'note_on' and opus_event[4] == 0): # 4.8 + cha = opus_event[2] + pitch = opus_event[3] + key = cha*128 + pitch + if chapitch2note_on_events.get(key): + new_event = chapitch2note_on_events[key].pop(0) + new_event[2] = ticks_so_far - new_event[1] + score_track.append(new_event) + elif pitch > 127: + pass #_warn('opus2score: note_off with no note_on, bad pitch='+str(pitch)) + else: + pass #_warn('opus2score: note_off with no note_on cha='+str(cha)+' pitch='+str(pitch)) + elif opus_event[0] == 'note_on': + cha = opus_event[2] + pitch = opus_event[3] + key = cha*128 + pitch + new_event = ['note',ticks_so_far,0,cha,pitch, opus_event[4]] + if chapitch2note_on_events.get(key): + chapitch2note_on_events[key].append(new_event) + else: + chapitch2note_on_events[key] = [new_event,] + else: + opus_event[1] = ticks_so_far + score_track.append(opus_event) + # check for unterminated notes (Oisín) -- 5.2 + for chapitch in chapitch2note_on_events: + note_on_events = chapitch2note_on_events[chapitch] + for new_e in note_on_events: + new_e[2] = ticks_so_far - new_e[1] + score_track.append(new_e) + pass #_warn("opus2score: note_on with no note_off cha="+str(new_e[3])+' pitch='+str(new_e[4])+'; adding note_off at end') + score.append(score_track) + _clean_up_warnings() + return score + +def midi2score(midi=b''): + r''' +Translates MIDI into a "score", using midi2opus() then opus2score() +''' + return opus2score(midi2opus(midi)) + +def midi2ms_score(midi=b''): + r''' +Translates MIDI into a "score" with one beat per second and one +tick per millisecond, using midi2opus() then to_millisecs() +then opus2score() +''' + return opus2score(to_millisecs(midi2opus(midi))) + +#------------------------ Other Transformations --------------------- + +def to_millisecs(old_opus=None): + r'''Recallibrates all the times in an "opus" to use one beat +per second and one tick per millisecond. This makes it +hard to retrieve any information about beats or barlines, +but it does make it easy to mix different scores together. +''' + if old_opus == None: + return [1000,[],] + try: + old_tpq = int(old_opus[0]) + except IndexError: # 5.0 + _warn('to_millisecs: the opus '+str(type(old_opus))+' has no elements') + return [1000,[],] + new_opus = [1000,] + # 6.7 first go through building a table of set_tempos by absolute-tick + ticks2tempo = {} + itrack = 1 + while itrack < len(old_opus): + ticks_so_far = 0 + for old_event in old_opus[itrack]: + if old_event[0] == 'note': + raise TypeError('to_millisecs needs an opus, not a score') + ticks_so_far += old_event[1] + if old_event[0] == 'set_tempo': + ticks2tempo[ticks_so_far] = old_event[2] + itrack += 1 + # then get the sorted-array of their keys + tempo_ticks = [] # list of keys + for k in ticks2tempo.keys(): + tempo_ticks.append(k) + tempo_ticks.sort() + # then go through converting to millisec, testing if the next + # set_tempo lies before the next track-event, and using it if so. + itrack = 1 + while itrack < len(old_opus): + ms_per_old_tick = 500.0 / old_tpq # float: will round later 6.3 + i_tempo_ticks = 0 + ticks_so_far = 0 + ms_so_far = 0.0 + previous_ms_so_far = 0.0 + new_track = [['set_tempo',0,1000000],] # new "crochet" is 1 sec + for old_event in old_opus[itrack]: + # detect if ticks2tempo has something before this event + # 20160702 if ticks2tempo is at the same time, leave it + event_delta_ticks = old_event[1] + if (i_tempo_ticks < len(tempo_ticks) and + tempo_ticks[i_tempo_ticks] < (ticks_so_far + old_event[1])): + delta_ticks = tempo_ticks[i_tempo_ticks] - ticks_so_far + ms_so_far += (ms_per_old_tick * delta_ticks) + ticks_so_far = tempo_ticks[i_tempo_ticks] + ms_per_old_tick = ticks2tempo[ticks_so_far] / (1000.0*old_tpq) + i_tempo_ticks += 1 + event_delta_ticks -= delta_ticks + new_event = copy.deepcopy(old_event) # now handle the new event + ms_so_far += (ms_per_old_tick * old_event[1]) + new_event[1] = round(ms_so_far - previous_ms_so_far) + if old_event[0] != 'set_tempo': + previous_ms_so_far = ms_so_far + new_track.append(new_event) + ticks_so_far += event_delta_ticks + new_opus.append(new_track) + itrack += 1 + _clean_up_warnings() + return new_opus + +def event2alsaseq(event=None): # 5.5 + r'''Converts an event into the format needed by the alsaseq module, +http://pp.com.mx/python/alsaseq +The type of track (opus or score) is autodetected. +''' + pass + +def grep(score=None, channels=None): + r'''Returns a "score" containing only the channels specified +''' + if score == None: + return [1000,[],] + ticks = score[0] + new_score = [ticks,] + if channels == None: + return new_score + channels = set(channels) + global Event2channelindex + itrack = 1 + while itrack < len(score): + new_score.append([]) + for event in score[itrack]: + channel_index = Event2channelindex.get(event[0], False) + if channel_index: + if event[channel_index] in channels: + new_score[itrack].append(event) + else: + new_score[itrack].append(event) + itrack += 1 + return new_score + +def play_score(score=None): + r'''Converts the "score" to midi, and feeds it into 'aplaymidi -' +''' + if score == None: + return + import subprocess + pipe = subprocess.Popen(['aplaymidi','-'], stdin=subprocess.PIPE) + if score_type(score) == 'opus': + pipe.stdin.write(opus2midi(score)) + else: + pipe.stdin.write(score2midi(score)) + pipe.stdin.close() + +def timeshift(score=None, shift=None, start_time=None, from_time=0, tracks={0,1,2,3,4,5,6,7,8,10,12,13,14,15}): + r'''Returns a "score" shifted in time by "shift" ticks, or shifted +so that the first event starts at "start_time" ticks. + +If "from_time" is specified, only those events in the score +that begin after it are shifted. If "start_time" is less than +"from_time" (or "shift" is negative), then the intermediate +notes are deleted, though patch-change events are preserved. + +If "tracks" are specified, then only those tracks get shifted. +"tracks" can be a list, tuple or set; it gets converted to set +internally. + +It is deprecated to specify both "shift" and "start_time". +If this does happen, timeshift() will print a warning to +stderr and ignore the "shift" argument. + +If "shift" is negative and sufficiently large that it would +leave some event with a negative tick-value, then the score +is shifted so that the first event occurs at time 0. This +also occurs if "start_time" is negative, and is also the +default if neither "shift" nor "start_time" are specified. +''' + #_warn('tracks='+str(tracks)) + if score == None or len(score) < 2: + return [1000, [],] + new_score = [score[0],] + my_type = score_type(score) + if my_type == '': + return new_score + if my_type == 'opus': + _warn("timeshift: opus format is not supported\n") + # _clean_up_scores() 6.2; doesn't exist! what was it supposed to do? + return new_score + if not (shift == None) and not (start_time == None): + _warn("timeshift: shift and start_time specified: ignoring shift\n") + shift = None + if shift == None: + if (start_time == None) or (start_time < 0): + start_time = 0 + # shift = start_time - from_time + + i = 1 # ignore first element (ticks) + tracks = set(tracks) # defend against tuples and lists + earliest = 1000000000 + if not (start_time == None) or shift < 0: # first find the earliest event + while i < len(score): + if len(tracks) and not ((i-1) in tracks): + i += 1 + continue + for event in score[i]: + if event[1] < from_time: + continue # just inspect the to_be_shifted events + if event[1] < earliest: + earliest = event[1] + i += 1 + if earliest > 999999999: + earliest = 0 + if shift == None: + shift = start_time - earliest + elif (earliest + shift) < 0: + start_time = 0 + shift = 0 - earliest + + i = 1 # ignore first element (ticks) + while i < len(score): + if len(tracks) == 0 or not ((i-1) in tracks): # 3.8 + new_score.append(score[i]) + i += 1 + continue + new_track = [] + for event in score[i]: + new_event = list(event) + #if new_event[1] == 0 and shift > 0 and new_event[0] != 'note': + # pass + #elif new_event[1] >= from_time: + if new_event[1] >= from_time: + # 4.1 must not rightshift set_tempo + if new_event[0] != 'set_tempo' or shift<0: + new_event[1] += shift + elif (shift < 0) and (new_event[1] >= (from_time+shift)): + continue + new_track.append(new_event) + if len(new_track) > 0: + new_score.append(new_track) + i += 1 + _clean_up_warnings() + return new_score + +def segment(score=None, start_time=None, end_time=None, start=0, end=100000000, + tracks={0,1,2,3,4,5,6,7,8,10,11,12,13,14,15}): + r'''Returns a "score" which is a segment of the one supplied +as the argument, beginning at "start_time" ticks and ending +at "end_time" ticks (or at the end if "end_time" is not supplied). +If the set "tracks" is specified, only those tracks will +be returned. +''' + if score == None or len(score) < 2: + return [1000, [],] + if start_time == None: # as of 4.2 start_time is recommended + start_time = start # start is legacy usage + if end_time == None: # likewise + end_time = end + new_score = [score[0],] + my_type = score_type(score) + if my_type == '': + return new_score + if my_type == 'opus': + # more difficult (disconnecting note_on's from their note_off's)... + _warn("segment: opus format is not supported\n") + _clean_up_warnings() + return new_score + i = 1 # ignore first element (ticks); we count in ticks anyway + tracks = set(tracks) # defend against tuples and lists + while i < len(score): + if len(tracks) and not ((i-1) in tracks): + i += 1 + continue + new_track = [] + channel2cc_num = {} # most recent controller change before start + channel2cc_val = {} + channel2cc_time = {} + channel2patch_num = {} # keep most recent patch change before start + channel2patch_time = {} + set_tempo_num = 500000 # most recent tempo change before start 6.3 + set_tempo_time = 0 + earliest_note_time = end_time + for event in score[i]: + if event[0] == 'control_change': # 6.5 + cc_time = channel2cc_time.get(event[2]) or 0 + if (event[1] <= start_time) and (event[1] >= cc_time): + channel2cc_num[event[2]] = event[3] + channel2cc_val[event[2]] = event[4] + channel2cc_time[event[2]] = event[1] + elif event[0] == 'patch_change': + patch_time = channel2patch_time.get(event[2]) or 0 + if (event[1]<=start_time) and (event[1] >= patch_time): # 2.0 + channel2patch_num[event[2]] = event[3] + channel2patch_time[event[2]] = event[1] + elif event[0] == 'set_tempo': + if (event[1]<=start_time) and (event[1]>=set_tempo_time): #6.4 + set_tempo_num = event[2] + set_tempo_time = event[1] + if (event[1] >= start_time) and (event[1] <= end_time): + new_track.append(event) + if (event[0] == 'note') and (event[1] < earliest_note_time): + earliest_note_time = event[1] + if len(new_track) > 0: + new_track.append(['set_tempo', start_time, set_tempo_num]) + for c in channel2patch_num: + new_track.append(['patch_change',start_time,c,channel2patch_num[c]],) + for c in channel2cc_num: # 6.5 + new_track.append(['control_change',start_time,c,channel2cc_num[c],channel2cc_val[c]]) + new_score.append(new_track) + i += 1 + _clean_up_warnings() + return new_score + +def score_type(opus_or_score=None): + r'''Returns a string, either 'opus' or 'score' or '' +''' + if opus_or_score == None or str(type(opus_or_score)).find('list')<0 or len(opus_or_score) < 2: + return '' + i = 1 # ignore first element + while i < len(opus_or_score): + for event in opus_or_score[i]: + if event[0] == 'note': + return 'score' + elif event[0] == 'note_on': + return 'opus' + i += 1 + return '' + +def concatenate_scores(scores): + r'''Concatenates a list of scores into one score. +If the scores differ in their "ticks" parameter, +they will all get converted to millisecond-tick format. +''' + # the deepcopys are needed if the input_score's are refs to the same obj + # e.g. if invoked by midisox's repeat() + input_scores = _consistentise_ticks(scores) # 3.7 + output_score = copy.deepcopy(input_scores[0]) + for input_score in input_scores[1:]: + output_stats = score2stats(output_score) + delta_ticks = output_stats['nticks'] + itrack = 1 + while itrack < len(input_score): + if itrack >= len(output_score): # new output track if doesn't exist + output_score.append([]) + for event in input_score[itrack]: + output_score[itrack].append(copy.deepcopy(event)) + output_score[itrack][-1][1] += delta_ticks + itrack += 1 + return output_score + +def merge_scores(scores): + r'''Merges a list of scores into one score. A merged score comprises +all of the tracks from all of the input scores; un-merging is possible +by selecting just some of the tracks. If the scores differ in their +"ticks" parameter, they will all get converted to millisecond-tick +format. merge_scores attempts to resolve channel-conflicts, +but there are of course only 15 available channels... +''' + input_scores = _consistentise_ticks(scores) # 3.6 + output_score = [1000] + channels_so_far = set() + all_channels = {0,1,2,3,4,5,6,7,8,10,11,12,13,14,15} + global Event2channelindex + for input_score in input_scores: + new_channels = set(score2stats(input_score).get('channels_total', [])) + new_channels.discard(9) # 2.8 cha9 must remain cha9 (in GM) + for channel in channels_so_far & new_channels: + # consistently choose lowest avaiable, to ease testing + free_channels = list(all_channels - (channels_so_far|new_channels)) + if len(free_channels) > 0: + free_channels.sort() + free_channel = free_channels[0] + else: + free_channel = None + break + itrack = 1 + while itrack < len(input_score): + for input_event in input_score[itrack]: + channel_index=Event2channelindex.get(input_event[0],False) + if channel_index and input_event[channel_index]==channel: + input_event[channel_index] = free_channel + itrack += 1 + channels_so_far.add(free_channel) + + channels_so_far |= new_channels + output_score.extend(input_score[1:]) + return output_score + +def _ticks(event): + return event[1] +def mix_opus_tracks(input_tracks): # 5.5 + r'''Mixes an array of tracks into one track. A mixed track +cannot be un-mixed. It is assumed that the tracks share the same +ticks parameter and the same tempo. +Mixing score-tracks is trivial (just insert all events into one array). +Mixing opus-tracks is only slightly harder, but it's common enough +that a dedicated function is useful. +''' + output_score = [1000, []] + for input_track in input_tracks: # 5.8 + input_score = opus2score([1000, input_track]) + for event in input_score[1]: + output_score[1].append(event) + output_score[1].sort(key=_ticks) + output_opus = score2opus(output_score) + return output_opus[1] + +def mix_scores(scores): + r'''Mixes a list of scores into one one-track score. +A mixed score cannot be un-mixed. Hopefully the scores +have no undesirable channel-conflicts between them. +If the scores differ in their "ticks" parameter, +they will all get converted to millisecond-tick format. +''' + input_scores = _consistentise_ticks(scores) # 3.6 + output_score = [1000, []] + for input_score in input_scores: + for input_track in input_score[1:]: + output_score[1].extend(input_track) + return output_score + +def score2stats(opus_or_score=None): + r'''Returns a dict of some basic stats about the score, like +bank_select (list of tuples (msb,lsb)), +channels_by_track (list of lists), channels_total (set), +general_midi_mode (list), +ntracks, nticks, patch_changes_by_track (list of dicts), +num_notes_by_channel (list of numbers), +patch_changes_total (set), +percussion (dict histogram of channel 9 events), +pitches (dict histogram of pitches on channels other than 9), +pitch_range_by_track (list, by track, of two-member-tuples), +pitch_range_sum (sum over tracks of the pitch_ranges), +''' + bank_select_msb = -1 + bank_select_lsb = -1 + bank_select = [] + channels_by_track = [] + channels_total = set([]) + general_midi_mode = [] + num_notes_by_channel = dict([]) + patches_used_by_track = [] + patches_used_total = set([]) + patch_changes_by_track = [] + patch_changes_total = set([]) + percussion = dict([]) # histogram of channel 9 "pitches" + pitches = dict([]) # histogram of pitch-occurrences channels 0-8,10-15 + pitch_range_sum = 0 # u pitch-ranges of each track + pitch_range_by_track = [] + is_a_score = True + if opus_or_score == None: + return {'bank_select':[], 'channels_by_track':[], 'channels_total':[], + 'general_midi_mode':[], 'ntracks':0, 'nticks':0, + 'num_notes_by_channel':dict([]), + 'patch_changes_by_track':[], 'patch_changes_total':[], + 'percussion':{}, 'pitches':{}, 'pitch_range_by_track':[], + 'ticks_per_quarter':0, 'pitch_range_sum':0} + ticks_per_quarter = opus_or_score[0] + i = 1 # ignore first element, which is ticks + nticks = 0 + while i < len(opus_or_score): + highest_pitch = 0 + lowest_pitch = 128 + channels_this_track = set([]) + patch_changes_this_track = dict({}) + for event in opus_or_score[i]: + if event[0] == 'note': + num_notes_by_channel[event[3]] = num_notes_by_channel.get(event[3],0) + 1 + if event[3] == 9: + percussion[event[4]] = percussion.get(event[4],0) + 1 + else: + pitches[event[4]] = pitches.get(event[4],0) + 1 + if event[4] > highest_pitch: + highest_pitch = event[4] + if event[4] < lowest_pitch: + lowest_pitch = event[4] + channels_this_track.add(event[3]) + channels_total.add(event[3]) + finish_time = event[1] + event[2] + if finish_time > nticks: + nticks = finish_time + elif event[0] == 'note_off' or (event[0] == 'note_on' and event[4] == 0): # 4.8 + finish_time = event[1] + if finish_time > nticks: + nticks = finish_time + elif event[0] == 'note_on': + is_a_score = False + num_notes_by_channel[event[2]] = num_notes_by_channel.get(event[2],0) + 1 + if event[2] == 9: + percussion[event[3]] = percussion.get(event[3],0) + 1 + else: + pitches[event[3]] = pitches.get(event[3],0) + 1 + if event[3] > highest_pitch: + highest_pitch = event[3] + if event[3] < lowest_pitch: + lowest_pitch = event[3] + channels_this_track.add(event[2]) + channels_total.add(event[2]) + elif event[0] == 'patch_change': + patch_changes_this_track[event[2]] = event[3] + patch_changes_total.add(event[3]) + elif event[0] == 'control_change': + if event[3] == 0: # bank select MSB + bank_select_msb = event[4] + elif event[3] == 32: # bank select LSB + bank_select_lsb = event[4] + if bank_select_msb >= 0 and bank_select_lsb >= 0: + bank_select.append((bank_select_msb,bank_select_lsb)) + bank_select_msb = -1 + bank_select_lsb = -1 + elif event[0] == 'sysex_f0': + if _sysex2midimode.get(event[2], -1) >= 0: + general_midi_mode.append(_sysex2midimode.get(event[2])) + if is_a_score: + if event[1] > nticks: + nticks = event[1] + else: + nticks += event[1] + if lowest_pitch == 128: + lowest_pitch = 0 + channels_by_track.append(channels_this_track) + patch_changes_by_track.append(patch_changes_this_track) + pitch_range_by_track.append((lowest_pitch,highest_pitch)) + pitch_range_sum += (highest_pitch-lowest_pitch) + i += 1 + + return {'bank_select':bank_select, + 'channels_by_track':channels_by_track, + 'channels_total':channels_total, + 'general_midi_mode':general_midi_mode, + 'ntracks':len(opus_or_score)-1, + 'nticks':nticks, + 'num_notes_by_channel':num_notes_by_channel, + 'patch_changes_by_track':patch_changes_by_track, + 'patch_changes_total':patch_changes_total, + 'percussion':percussion, + 'pitches':pitches, + 'pitch_range_by_track':pitch_range_by_track, + 'pitch_range_sum':pitch_range_sum, + 'ticks_per_quarter':ticks_per_quarter} + +#----------------------------- Event stuff -------------------------- + +_sysex2midimode = { + "\x7E\x7F\x09\x01\xF7": 1, + "\x7E\x7F\x09\x02\xF7": 0, + "\x7E\x7F\x09\x03\xF7": 2, +} + +# Some public-access tuples: +MIDI_events = tuple('''note_off note_on key_after_touch +control_change patch_change channel_after_touch +pitch_wheel_change'''.split()) + +Text_events = tuple('''text_event copyright_text_event +track_name instrument_name lyric marker cue_point text_event_08 +text_event_09 text_event_0a text_event_0b text_event_0c +text_event_0d text_event_0e text_event_0f'''.split()) + +Nontext_meta_events = tuple('''end_track set_tempo +smpte_offset time_signature key_signature sequencer_specific +raw_meta_event sysex_f0 sysex_f7 song_position song_select +tune_request'''.split()) +# unsupported: raw_data + +# Actually, 'tune_request' is is F-series event, not strictly a meta-event... +Meta_events = Text_events + Nontext_meta_events +All_events = MIDI_events + Meta_events + +# And three dictionaries: +Number2patch = { # General MIDI patch numbers: +0:'Acoustic Grand', +1:'Bright Acoustic', +2:'Electric Grand', +3:'Honky-Tonk', +4:'Electric Piano 1', +5:'Electric Piano 2', +6:'Harpsichord', +7:'Clav', +8:'Celesta', +9:'Glockenspiel', +10:'Music Box', +11:'Vibraphone', +12:'Marimba', +13:'Xylophone', +14:'Tubular Bells', +15:'Dulcimer', +16:'Drawbar Organ', +17:'Percussive Organ', +18:'Rock Organ', +19:'Church Organ', +20:'Reed Organ', +21:'Accordion', +22:'Harmonica', +23:'Tango Accordion', +24:'Acoustic Guitar(nylon)', +25:'Acoustic Guitar(steel)', +26:'Electric Guitar(jazz)', +27:'Electric Guitar(clean)', +28:'Electric Guitar(muted)', +29:'Overdriven Guitar', +30:'Distortion Guitar', +31:'Guitar Harmonics', +32:'Acoustic Bass', +33:'Electric Bass(finger)', +34:'Electric Bass(pick)', +35:'Fretless Bass', +36:'Slap Bass 1', +37:'Slap Bass 2', +38:'Synth Bass 1', +39:'Synth Bass 2', +40:'Violin', +41:'Viola', +42:'Cello', +43:'Contrabass', +44:'Tremolo Strings', +45:'Pizzicato Strings', +46:'Orchestral Harp', +47:'Timpani', +48:'String Ensemble 1', +49:'String Ensemble 2', +50:'SynthStrings 1', +51:'SynthStrings 2', +52:'Choir Aahs', +53:'Voice Oohs', +54:'Synth Voice', +55:'Orchestra Hit', +56:'Trumpet', +57:'Trombone', +58:'Tuba', +59:'Muted Trumpet', +60:'French Horn', +61:'Brass Section', +62:'SynthBrass 1', +63:'SynthBrass 2', +64:'Soprano Sax', +65:'Alto Sax', +66:'Tenor Sax', +67:'Baritone Sax', +68:'Oboe', +69:'English Horn', +70:'Bassoon', +71:'Clarinet', +72:'Piccolo', +73:'Flute', +74:'Recorder', +75:'Pan Flute', +76:'Blown Bottle', +77:'Skakuhachi', +78:'Whistle', +79:'Ocarina', +80:'Lead 1 (square)', +81:'Lead 2 (sawtooth)', +82:'Lead 3 (calliope)', +83:'Lead 4 (chiff)', +84:'Lead 5 (charang)', +85:'Lead 6 (voice)', +86:'Lead 7 (fifths)', +87:'Lead 8 (bass+lead)', +88:'Pad 1 (new age)', +89:'Pad 2 (warm)', +90:'Pad 3 (polysynth)', +91:'Pad 4 (choir)', +92:'Pad 5 (bowed)', +93:'Pad 6 (metallic)', +94:'Pad 7 (halo)', +95:'Pad 8 (sweep)', +96:'FX 1 (rain)', +97:'FX 2 (soundtrack)', +98:'FX 3 (crystal)', +99:'FX 4 (atmosphere)', +100:'FX 5 (brightness)', +101:'FX 6 (goblins)', +102:'FX 7 (echoes)', +103:'FX 8 (sci-fi)', +104:'Sitar', +105:'Banjo', +106:'Shamisen', +107:'Koto', +108:'Kalimba', +109:'Bagpipe', +110:'Fiddle', +111:'Shanai', +112:'Tinkle Bell', +113:'Agogo', +114:'Steel Drums', +115:'Woodblock', +116:'Taiko Drum', +117:'Melodic Tom', +118:'Synth Drum', +119:'Reverse Cymbal', +120:'Guitar Fret Noise', +121:'Breath Noise', +122:'Seashore', +123:'Bird Tweet', +124:'Telephone Ring', +125:'Helicopter', +126:'Applause', +127:'Gunshot', +} +Notenum2percussion = { # General MIDI Percussion (on Channel 9): +35:'Acoustic Bass Drum', +36:'Bass Drum 1', +37:'Side Stick', +38:'Acoustic Snare', +39:'Hand Clap', +40:'Electric Snare', +41:'Low Floor Tom', +42:'Closed Hi-Hat', +43:'High Floor Tom', +44:'Pedal Hi-Hat', +45:'Low Tom', +46:'Open Hi-Hat', +47:'Low-Mid Tom', +48:'Hi-Mid Tom', +49:'Crash Cymbal 1', +50:'High Tom', +51:'Ride Cymbal 1', +52:'Chinese Cymbal', +53:'Ride Bell', +54:'Tambourine', +55:'Splash Cymbal', +56:'Cowbell', +57:'Crash Cymbal 2', +58:'Vibraslap', +59:'Ride Cymbal 2', +60:'Hi Bongo', +61:'Low Bongo', +62:'Mute Hi Conga', +63:'Open Hi Conga', +64:'Low Conga', +65:'High Timbale', +66:'Low Timbale', +67:'High Agogo', +68:'Low Agogo', +69:'Cabasa', +70:'Maracas', +71:'Short Whistle', +72:'Long Whistle', +73:'Short Guiro', +74:'Long Guiro', +75:'Claves', +76:'Hi Wood Block', +77:'Low Wood Block', +78:'Mute Cuica', +79:'Open Cuica', +80:'Mute Triangle', +81:'Open Triangle', +} + +Event2channelindex = { 'note':3, 'note_off':2, 'note_on':2, + 'key_after_touch':2, 'control_change':2, 'patch_change':2, + 'channel_after_touch':2, 'pitch_wheel_change':2 +} + +################################################################ +# The code below this line is full of frightening things, all to +# do with the actual encoding and decoding of binary MIDI data. + +def _twobytes2int(byte_a): + r'''decode a 16 bit quantity from two bytes,''' + return (byte_a[1] | (byte_a[0] << 8)) + +def _int2twobytes(int_16bit): + r'''encode a 16 bit quantity into two bytes,''' + return bytes([(int_16bit>>8) & 0xFF, int_16bit & 0xFF]) + +def _read_14_bit(byte_a): + r'''decode a 14 bit quantity from two bytes,''' + return (byte_a[0] | (byte_a[1] << 7)) + +def _write_14_bit(int_14bit): + r'''encode a 14 bit quantity into two bytes,''' + return bytes([int_14bit & 0x7F, (int_14bit>>7) & 0x7F]) + +def _ber_compressed_int(integer): + r'''BER compressed integer (not an ASN.1 BER, see perlpacktut for +details). Its bytes represent an unsigned integer in base 128, +most significant digit first, with as few digits as possible. +Bit eight (the high bit) is set on each byte except the last. +''' + ber = bytearray(b'') + seven_bits = 0x7F & integer + ber.insert(0, seven_bits) # XXX surely should convert to a char ? + integer >>= 7 + while integer > 0: + seven_bits = 0x7F & integer + ber.insert(0, 0x80|seven_bits) # XXX surely should convert to a char ? + integer >>= 7 + return ber + +def _unshift_ber_int(ba): + r'''Given a bytearray, returns a tuple of (the ber-integer at the +start, and the remainder of the bytearray). +''' + if not len(ba): # 6.7 + _warn('_unshift_ber_int: no integer found') + return ((0, b"")) + byte = ba.pop(0) + integer = 0 + while True: + integer += (byte & 0x7F) + if not (byte & 0x80): + return ((integer, ba)) + if not len(ba): + _warn('_unshift_ber_int: no end-of-integer found') + return ((0, ba)) + byte = ba.pop(0) + integer <<= 7 + +def _clean_up_warnings(): # 5.4 + # Call this before returning from any publicly callable function + # whenever there's a possibility that a warning might have been printed + # by the function, or by any private functions it might have called. + global _previous_times + global _previous_warning + if _previous_times > 1: + # E:1176, 0: invalid syntax (, line 1176) (syntax-error) ??? + # print(' previous message repeated '+str(_previous_times)+' times', file=sys.stderr) + # 6.7 + sys.stderr.write(' previous message repeated {0} times\n'.format(_previous_times)) + elif _previous_times > 0: + sys.stderr.write(' previous message repeated\n') + _previous_times = 0 + _previous_warning = '' + +def _warn(s=''): + global _previous_times + global _previous_warning + if s == _previous_warning: # 5.4 + _previous_times = _previous_times + 1 + else: + _clean_up_warnings() + sys.stderr.write(str(s)+"\n") + _previous_warning = s + +def _some_text_event(which_kind=0x01, text=b'some_text'): + if str(type(text)).find("'str'") >= 0: # 6.4 test for back-compatibility + data = bytes(text, encoding='ISO-8859-1') + else: + data = bytes(text) + return b'\xFF'+bytes((which_kind,))+_ber_compressed_int(len(data))+data + +def _consistentise_ticks(scores): # 3.6 + # used by mix_scores, merge_scores, concatenate_scores + if len(scores) == 1: + return copy.deepcopy(scores) + are_consistent = True + ticks = scores[0][0] + iscore = 1 + while iscore < len(scores): + if scores[iscore][0] != ticks: + are_consistent = False + break + iscore += 1 + if are_consistent: + return copy.deepcopy(scores) + new_scores = [] + iscore = 0 + while iscore < len(scores): + score = scores[iscore] + new_scores.append(opus2score(to_millisecs(score2opus(score)))) + iscore += 1 + return new_scores + + +########################################################################### + +def _decode(trackdata=b'', exclude=None, include=None, + event_callback=None, exclusive_event_callback=None, no_eot_magic=False): + r'''Decodes MIDI track data into an opus-style list of events. +The options: + 'exclude' is a list of event types which will be ignored SHOULD BE A SET + 'include' (and no exclude), makes exclude a list + of all possible events, /minus/ what include specifies + 'event_callback' is a coderef + 'exclusive_event_callback' is a coderef +''' + trackdata = bytearray(trackdata) + if exclude == None: + exclude = [] + if include == None: + include = [] + if include and not exclude: + exclude = All_events + include = set(include) + exclude = set(exclude) + + # Pointer = 0; not used here; we eat through the bytearray instead. + event_code = -1; # used for running status + event_count = 0; + events = [] + + while(len(trackdata)): + # loop while there's anything to analyze ... + eot = False # When True, the event registrar aborts this loop + event_count += 1 + + E = [] + # E for events - we'll feed it to the event registrar at the end. + + # Slice off the delta time code, and analyze it + [time, remainder] = _unshift_ber_int(trackdata) + + # Now let's see what we can make of the command + first_byte = trackdata.pop(0) & 0xFF + + if (first_byte < 0xF0): # It's a MIDI event + if (first_byte & 0x80): + event_code = first_byte + else: + # It wants running status; use last event_code value + trackdata.insert(0, first_byte) + if (event_code == -1): + _warn("Running status not set; Aborting track.") + return [] + + command = event_code & 0xF0 + channel = event_code & 0x0F + + if (command == 0xF6): # 0-byte argument + pass + elif (command == 0xC0 or command == 0xD0): # 1-byte argument + parameter = trackdata.pop(0) # could be B + else: # 2-byte argument could be BB or 14-bit + parameter = (trackdata.pop(0), trackdata.pop(0)) + + ################################################################# + # MIDI events + + if (command == 0x80): + if 'note_off' in exclude: + continue + E = ['note_off', time, channel, parameter[0], parameter[1]] + elif (command == 0x90): + if 'note_on' in exclude: + continue + E = ['note_on', time, channel, parameter[0], parameter[1]] + elif (command == 0xA0): + if 'key_after_touch' in exclude: + continue + E = ['key_after_touch',time,channel,parameter[0],parameter[1]] + elif (command == 0xB0): + if 'control_change' in exclude: + continue + E = ['control_change',time,channel,parameter[0],parameter[1]] + elif (command == 0xC0): + if 'patch_change' in exclude: + continue + E = ['patch_change', time, channel, parameter] + elif (command == 0xD0): + if 'channel_after_touch' in exclude: + continue + E = ['channel_after_touch', time, channel, parameter] + elif (command == 0xE0): + if 'pitch_wheel_change' in exclude: + continue + E = ['pitch_wheel_change', time, channel, + _read_14_bit(parameter)-0x2000] + else: + _warn("Shouldn't get here; command="+hex(command)) + + elif (first_byte == 0xFF): # It's a Meta-Event! ################## + #[command, length, remainder] = + # unpack("xCwa*", substr(trackdata, $Pointer, 6)); + #Pointer += 6 - len(remainder); + # # Move past JUST the length-encoded. + command = trackdata.pop(0) & 0xFF + [length, trackdata] = _unshift_ber_int(trackdata) + if (command == 0x00): + if (length == 2): + E = ['set_sequence_number',time,_twobytes2int(trackdata)] + else: + _warn('set_sequence_number: length must be 2, not '+str(length)) + E = ['set_sequence_number', time, 0] + + elif command >= 0x01 and command <= 0x0f: # Text events + # 6.2 take it in bytes; let the user get the right encoding. + # text_str = trackdata[0:length].decode('ascii','ignore') + # text_str = trackdata[0:length].decode('ISO-8859-1') + # 6.4 take it in bytes; let the user get the right encoding. + text_data = bytes(trackdata[0:length]) # 6.4 + # Defined text events + if (command == 0x01): + E = ['text_event', time, text_data] + elif (command == 0x02): + E = ['copyright_text_event', time, text_data] + elif (command == 0x03): + E = ['track_name', time, text_data] + elif (command == 0x04): + E = ['instrument_name', time, text_data] + elif (command == 0x05): + E = ['lyric', time, text_data] + elif (command == 0x06): + E = ['marker', time, text_data] + elif (command == 0x07): + E = ['cue_point', time, text_data] + # Reserved but apparently unassigned text events + elif (command == 0x08): + E = ['text_event_08', time, text_data] + elif (command == 0x09): + E = ['text_event_09', time, text_data] + elif (command == 0x0a): + E = ['text_event_0a', time, text_data] + elif (command == 0x0b): + E = ['text_event_0b', time, text_data] + elif (command == 0x0c): + E = ['text_event_0c', time, text_data] + elif (command == 0x0d): + E = ['text_event_0d', time, text_data] + elif (command == 0x0e): + E = ['text_event_0e', time, text_data] + elif (command == 0x0f): + E = ['text_event_0f', time, text_data] + + # Now the sticky events ------------------------------------- + elif (command == 0x2F): + E = ['end_track', time] + # The code for handling this, oddly, comes LATER, + # in the event registrar. + elif (command == 0x51): # DTime, Microseconds/Crochet + if length != 3: + _warn('set_tempo event, but length='+str(length)) + E = ['set_tempo', time, + struct.unpack(">I", b'\x00'+trackdata[0:3])[0]] + elif (command == 0x54): + if length != 5: # DTime, HR, MN, SE, FR, FF + _warn('smpte_offset event, but length='+str(length)) + E = ['smpte_offset',time] + list(struct.unpack(">BBBBB",trackdata[0:5])) + elif (command == 0x58): + if length != 4: # DTime, NN, DD, CC, BB + _warn('time_signature event, but length='+str(length)) + E = ['time_signature', time]+list(trackdata[0:4]) + elif (command == 0x59): + if length != 2: # DTime, SF(signed), MI + _warn('key_signature event, but length='+str(length)) + E = ['key_signature',time] + list(struct.unpack(">bB",trackdata[0:2])) + elif (command == 0x7F): # 6.4 + E = ['sequencer_specific',time, bytes(trackdata[0:length])] + else: + E = ['raw_meta_event', time, command, + bytes(trackdata[0:length])] # 6.0 + #"[uninterpretable meta-event command of length length]" + # DTime, Command, Binary Data + # It's uninterpretable; record it as raw_data. + + # Pointer += length; # Now move Pointer + trackdata = trackdata[length:] + + ###################################################################### + elif (first_byte == 0xF0 or first_byte == 0xF7): + # Note that sysexes in MIDI /files/ are different than sysexes + # in MIDI transmissions!! The vast majority of system exclusive + # messages will just use the F0 format. For instance, the + # transmitted message F0 43 12 00 07 F7 would be stored in a + # MIDI file as F0 05 43 12 00 07 F7. As mentioned above, it is + # required to include the F7 at the end so that the reader of the + # MIDI file knows that it has read the entire message. (But the F7 + # is omitted if this is a non-final block in a multiblock sysex; + # but the F7 (if there) is counted in the message's declared + # length, so we don't have to think about it anyway.) + #command = trackdata.pop(0) + [length, trackdata] = _unshift_ber_int(trackdata) + if first_byte == 0xF0: + # 20091008 added ISO-8859-1 to get an 8-bit str + # 6.4 return bytes instead + E = ['sysex_f0', time, bytes(trackdata[0:length])] + else: + E = ['sysex_f7', time, bytes(trackdata[0:length])] + trackdata = trackdata[length:] + + ###################################################################### + # Now, the MIDI file spec says: + # = + + # = + # = | | + # I know that, on the wire, can include note_on, + # note_off, and all the other 8x to Ex events, AND Fx events + # other than F0, F7, and FF -- namely, , + # , and . + # + # Whether these can occur in MIDI files is not clear specified + # from the MIDI file spec. So, I'm going to assume that + # they CAN, in practice, occur. I don't know whether it's + # proper for you to actually emit these into a MIDI file. + + elif (first_byte == 0xF2): # DTime, Beats + # ::= F2 + E = ['song_position', time, _read_14_bit(trackdata[:2])] + trackdata = trackdata[2:] + + elif (first_byte == 0xF3): # ::= F3 + # E = ['song_select', time, struct.unpack('>B',trackdata.pop(0))[0]] + E = ['song_select', time, trackdata[0]] + trackdata = trackdata[1:] + # DTime, Thing (what?! song number? whatever ...) + + elif (first_byte == 0xF6): # DTime + E = ['tune_request', time] + # What would a tune request be doing in a MIDI /file/? + + ######################################################### + # ADD MORE META-EVENTS HERE. TODO: + # f1 -- MTC Quarter Frame Message. One data byte follows + # the Status; it's the time code value, from 0 to 127. + # f8 -- MIDI clock. no data. + # fa -- MIDI start. no data. + # fb -- MIDI continue. no data. + # fc -- MIDI stop. no data. + # fe -- Active sense. no data. + # f4 f5 f9 fd -- unallocated + + r''' + elif (first_byte > 0xF0) { # Some unknown kinda F-series event #### + # Here we only produce a one-byte piece of raw data. + # But the encoder for 'raw_data' accepts any length of it. + E = [ 'raw_data', + time, substr(trackdata,Pointer,1) ] + # DTime and the Data (in this case, the one Event-byte) + ++Pointer; # itself + +''' + elif first_byte > 0xF0: # Some unknown F-series event + # Here we only produce a one-byte piece of raw data. + # E = ['raw_data', time, bytest(trackdata[0])] # 6.4 + E = ['raw_data', time, trackdata[0]] # 6.4 6.7 + trackdata = trackdata[1:] + else: # Fallthru. + _warn("Aborting track. Command-byte first_byte="+hex(first_byte)) + break + # End of the big if-group + + + ###################################################################### + # THE EVENT REGISTRAR... + if E and (E[0] == 'end_track'): + # This is the code for exceptional handling of the EOT event. + eot = True + if not no_eot_magic: + if E[1] > 0: # a null text-event to carry the delta-time + E = ['text_event', E[1], ''] + else: + E = [] # EOT with a delta-time of 0; ignore it. + + if E and not (E[0] in exclude): + #if ( $exclusive_event_callback ): + # &{ $exclusive_event_callback }( @E ); + #else: + # &{ $event_callback }( @E ) if $event_callback; + events.append(E) + if eot: + break + + # End of the big "Event" while-block + + return events + + +########################################################################### +def _encode(events_lol, unknown_callback=None, never_add_eot=False, + no_eot_magic=False, no_running_status=False): + # encode an event structure, presumably for writing to a file + # Calling format: + # $data_r = MIDI::Event::encode( \@event_lol, { options } ); + # Takes a REFERENCE to an event structure (a LoL) + # Returns an (unblessed) REFERENCE to track data. + + # If you want to use this to encode a /single/ event, + # you still have to do it as a reference to an event structure (a LoL) + # that just happens to have just one event. I.e., + # encode( [ $event ] ) or encode( [ [ 'note_on', 100, 5, 42, 64] ] ) + # If you're doing this, consider the never_add_eot track option, as in + # print MIDI ${ encode( [ $event], { 'never_add_eot' => 1} ) }; + + data = [] # what I'll store the chunks of byte-data in + + # This is so my end_track magic won't corrupt the original + events = copy.deepcopy(events_lol) + + if not never_add_eot: + # One way or another, tack on an 'end_track' + if events: + last = events[-1] + if not (last[0] == 'end_track'): # no end_track already + if (last[0] == 'text_event' and len(last[2]) == 0): + # 0-length text event at track-end. + if no_eot_magic: + # Exceptional case: don't mess with track-final + # 0-length text_events; just peg on an end_track + events.append(['end_track', 0]) + else: + # NORMAL CASE: replace with an end_track, leaving DTime + last[0] = 'end_track' + else: + # last event was neither 0-length text_event nor end_track + events.append(['end_track', 0]) + else: # an eventless track! + events = [['end_track', 0],] + + # maybe_running_status = not no_running_status # unused? 4.7 + last_status = -1 + + for event_r in (events): + E = copy.deepcopy(event_r) + # otherwise the shifting'd corrupt the original + if not E: + continue + + event = E.pop(0) + if not len(event): + continue + + dtime = int(E.pop(0)) + # print('event='+str(event)+' dtime='+str(dtime)) + + event_data = '' + + if ( # MIDI events -- eligible for running status + event == 'note_on' + or event == 'note_off' + or event == 'control_change' + or event == 'key_after_touch' + or event == 'patch_change' + or event == 'channel_after_touch' + or event == 'pitch_wheel_change' ): + + # This block is where we spend most of the time. Gotta be tight. + if (event == 'note_off'): + status = 0x80 | (int(E[0]) & 0x0F) + parameters = struct.pack('>BB', int(E[1])&0x7F, int(E[2])&0x7F) + elif (event == 'note_on'): + status = 0x90 | (int(E[0]) & 0x0F) + parameters = struct.pack('>BB', int(E[1])&0x7F, int(E[2])&0x7F) + elif (event == 'key_after_touch'): + status = 0xA0 | (int(E[0]) & 0x0F) + parameters = struct.pack('>BB', int(E[1])&0x7F, int(E[2])&0x7F) + elif (event == 'control_change'): + status = 0xB0 | (int(E[0]) & 0x0F) + parameters = struct.pack('>BB', int(E[1])&0xFF, int(E[2])&0xFF) + elif (event == 'patch_change'): + status = 0xC0 | (int(E[0]) & 0x0F) + parameters = struct.pack('>B', int(E[1]) & 0xFF) + elif (event == 'channel_after_touch'): + status = 0xD0 | (int(E[0]) & 0x0F) + parameters = struct.pack('>B', int(E[1]) & 0xFF) + elif (event == 'pitch_wheel_change'): + status = 0xE0 | (int(E[0]) & 0x0F) + parameters = _write_14_bit(int(E[1]) + 0x2000) + else: + _warn("BADASS FREAKOUT ERROR 31415!") + + # And now the encoding + # w = BER compressed integer (not ASN.1 BER, see perlpacktut for + # details). Its bytes represent an unsigned integer in base 128, + # most significant digit first, with as few digits as possible. + # Bit eight (the high bit) is set on each byte except the last. + + data.append(_ber_compressed_int(dtime)) + if (status != last_status) or no_running_status: + data.append(struct.pack('>B', status)) + data.append(parameters) + + last_status = status + continue + else: + # Not a MIDI event. + # All the code in this block could be more efficient, + # but this is not where the code needs to be tight. + # print "zaz $event\n"; + last_status = -1 + + if event == 'raw_meta_event': + event_data = _some_text_event(int(E[0]), E[1]) + elif (event == 'set_sequence_number'): # 3.9 + event_data = b'\xFF\x00\x02'+_int2twobytes(E[0]) + + # Text meta-events... + # a case for a dict, I think (pjb) ... + elif (event == 'text_event'): + event_data = _some_text_event(0x01, E[0]) + elif (event == 'copyright_text_event'): + event_data = _some_text_event(0x02, E[0]) + elif (event == 'track_name'): + event_data = _some_text_event(0x03, E[0]) + elif (event == 'instrument_name'): + event_data = _some_text_event(0x04, E[0]) + elif (event == 'lyric'): + event_data = _some_text_event(0x05, E[0]) + elif (event == 'marker'): + event_data = _some_text_event(0x06, E[0]) + elif (event == 'cue_point'): + event_data = _some_text_event(0x07, E[0]) + elif (event == 'text_event_08'): + event_data = _some_text_event(0x08, E[0]) + elif (event == 'text_event_09'): + event_data = _some_text_event(0x09, E[0]) + elif (event == 'text_event_0a'): + event_data = _some_text_event(0x0A, E[0]) + elif (event == 'text_event_0b'): + event_data = _some_text_event(0x0B, E[0]) + elif (event == 'text_event_0c'): + event_data = _some_text_event(0x0C, E[0]) + elif (event == 'text_event_0d'): + event_data = _some_text_event(0x0D, E[0]) + elif (event == 'text_event_0e'): + event_data = _some_text_event(0x0E, E[0]) + elif (event == 'text_event_0f'): + event_data = _some_text_event(0x0F, E[0]) + # End of text meta-events + + elif (event == 'end_track'): + event_data = b"\xFF\x2F\x00" + + elif (event == 'set_tempo'): + #event_data = struct.pack(">BBwa*", 0xFF, 0x51, 3, + # substr( struct.pack('>I', E[0]), 1, 3)) + event_data = b'\xFF\x51\x03'+struct.pack('>I',E[0])[1:] + elif (event == 'smpte_offset'): + # event_data = struct.pack(">BBwBBBBB", 0xFF, 0x54, 5, E[0:5] ) + event_data = struct.pack(">BBBbBBBB", 0xFF,0x54,0x05,E[0],E[1],E[2],E[3],E[4]) + elif (event == 'time_signature'): + # event_data = struct.pack(">BBwBBBB", 0xFF, 0x58, 4, E[0:4] ) + event_data = struct.pack(">BBBbBBB", 0xFF, 0x58, 0x04, E[0],E[1],E[2],E[3]) + elif (event == 'key_signature'): + event_data = struct.pack(">BBBbB", 0xFF, 0x59, 0x02, E[0],E[1]) + elif (event == 'sequencer_specific'): + # event_data = struct.pack(">BBwa*", 0xFF,0x7F, len(E[0]), E[0]) + event_data = _some_text_event(0x7F, E[0]) + # End of Meta-events + + # Other Things... + elif (event == 'sysex_f0'): + #event_data = struct.pack(">Bwa*", 0xF0, len(E[0]), E[0]) + #B=bitstring w=BER-compressed-integer a=null-padded-ascii-str + event_data = bytearray(b'\xF0')+_ber_compressed_int(len(E[0]))+bytearray(E[0]) + elif (event == 'sysex_f7'): + #event_data = struct.pack(">Bwa*", 0xF7, len(E[0]), E[0]) + event_data = bytearray(b'\xF7')+_ber_compressed_int(len(E[0]))+bytearray(E[0]) + + elif (event == 'song_position'): + event_data = b"\xF2" + _write_14_bit( E[0] ) + elif (event == 'song_select'): + event_data = struct.pack('>BB', 0xF3, E[0] ) + elif (event == 'tune_request'): + event_data = b"\xF6" + elif (event == 'raw_data'): + _warn("_encode: raw_data event not supported") + # event_data = E[0] + continue + # End of Other Stuff + + else: + # The Big Fallthru + if unknown_callback: + # push(@data, &{ $unknown_callback }( @$event_r )) + pass + else: + _warn("Unknown event: "+str(event)) + # To surpress complaint here, just set + # 'unknown_callback' => sub { return () } + continue + + #print "Event $event encoded part 2\n" + if str(type(event_data)).find("'str'") >= 0: + event_data = bytearray(event_data.encode('Latin1', 'ignore')) + if len(event_data): # how could $event_data be empty + # data.append(struct.pack('>wa*', dtime, event_data)) + # print(' event_data='+str(event_data)) + data.append(_ber_compressed_int(dtime)+event_data) + + return b''.join(data) + +#=============================================================================== + +""" +================================================================================ + + pyFluidSynth + + Python bindings for FluidSynth + + Copyright 2008, Nathan Whitehead + + + Released under the LGPL + + This module contains python bindings for FluidSynth. FluidSynth is a + software synthesizer for generating music. It works like a MIDI + synthesizer. You load patches, set parameters, then send NOTEON and + NOTEOFF events to play notes. Instruments are defined in SoundFonts, + generally files with the extension SF2. FluidSynth can either be used + to play audio itself, or you can call a function that returns chunks + of audio data and output the data to the soundcard yourself. + FluidSynth works on all major platforms, so pyFluidSynth should also. + +================================================================================ +""" + +from ctypes import * +from ctypes.util import find_library +import os + +# A short circuited or expression to find the FluidSynth library +# (mostly needed for Windows distributions of libfluidsynth supplied with QSynth) + +# DLL search method changed in Python 3.8 +# https://docs.python.org/3/library/os.html#os.add_dll_directory +if hasattr(os, 'add_dll_directory'): + os.add_dll_directory(os.getcwd()) + +lib = find_library('fluidsynth') or \ + find_library('libfluidsynth') or \ + find_library('libfluidsynth-3') or \ + find_library('libfluidsynth-2') or \ + find_library('libfluidsynth-1') + +if lib is None: + raise ImportError("Couldn't find the FluidSynth library.") + +# Dynamically link the FluidSynth library +# Architecture (32-/64-bit) must match your Python version +_fl = CDLL(lib) + +# Helper function for declaring function prototypes +def cfunc(name, result, *args): + """Build and apply a ctypes prototype complete with parameter flags""" + if hasattr(_fl, name): + atypes = [] + aflags = [] + for arg in args: + atypes.append(arg[1]) + aflags.append((arg[2], arg[0]) + arg[3:]) + return CFUNCTYPE(result, *atypes)((name, _fl), tuple(aflags)) + else: # Handle Fluidsynth 1.x, 2.x, etc. API differences + return None + +# Bump this up when changing the interface for users +api_version = '1.3.1' + +# Function prototypes for C versions of functions + +FLUID_OK = 0 +FLUID_FAILED = -1 + +fluid_version = cfunc('fluid_version', c_void_p, + ('major', POINTER(c_int), 1), + ('minor', POINTER(c_int), 1), + ('micro', POINTER(c_int), 1)) + +majver = c_int() +fluid_version(majver, c_int(), c_int()) +if majver.value > 1: + FLUIDSETTING_EXISTS = FLUID_OK +else: + FLUIDSETTING_EXISTS = 1 + +# fluid settings +new_fluid_settings = cfunc('new_fluid_settings', c_void_p) + +fluid_settings_setstr = cfunc('fluid_settings_setstr', c_int, + ('settings', c_void_p, 1), + ('name', c_char_p, 1), + ('str', c_char_p, 1)) + +fluid_settings_setnum = cfunc('fluid_settings_setnum', c_int, + ('settings', c_void_p, 1), + ('name', c_char_p, 1), + ('val', c_double, 1)) + +fluid_settings_setint = cfunc('fluid_settings_setint', c_int, + ('settings', c_void_p, 1), + ('name', c_char_p, 1), + ('val', c_int, 1)) + +fluid_settings_copystr = cfunc('fluid_settings_copystr', c_int, + ('settings', c_void_p, 1), + ('name', c_char_p, 1), + ('str', c_char_p, 1), + ('len', c_int, 1)) + +fluid_settings_getnum = cfunc('fluid_settings_getnum', c_int, + ('settings', c_void_p, 1), + ('name', c_char_p, 1), + ('val', POINTER(c_double), 1)) + +fluid_settings_getint = cfunc('fluid_settings_getint', c_int, + ('settings', c_void_p, 1), + ('name', c_char_p, 1), + ('val', POINTER(c_int), 1)) + +delete_fluid_settings = cfunc('delete_fluid_settings', None, + ('settings', c_void_p, 1)) + +fluid_synth_activate_key_tuning = cfunc('fluid_synth_activate_key_tuning', c_int, + ('synth', c_void_p, 1), + ('bank', c_int, 1), + ('prog', c_int, 1), + ('name', c_char_p, 1), + ('pitch', POINTER(c_double), 1), + ('apply', c_int, 1)) + +fluid_synth_activate_tuning = cfunc('fluid_synth_activate_tuning', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('bank', c_int, 1), + ('prog', c_int, 1), + ('apply', c_int, 1)) + +fluid_synth_deactivate_tuning = cfunc('fluid_synth_deactivate_tuning', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('apply', c_int, 1)) + +fluid_synth_tuning_dump = cfunc('fluid_synth_tuning_dump', c_int, + ('synth', c_void_p, 1), + ('bank', c_int, 1), + ('prog', c_int, 1), + ('name', c_char_p, 1), + ('length', c_int, 1), + ('pitch', POINTER(c_double), 1)) + +# fluid synth +new_fluid_synth = cfunc('new_fluid_synth', c_void_p, + ('settings', c_void_p, 1)) + +delete_fluid_synth = cfunc('delete_fluid_synth', None, + ('synth', c_void_p, 1)) + +fluid_synth_sfload = cfunc('fluid_synth_sfload', c_int, + ('synth', c_void_p, 1), + ('filename', c_char_p, 1), + ('update_midi_presets', c_int, 1)) + +fluid_synth_sfunload = cfunc('fluid_synth_sfunload', c_int, + ('synth', c_void_p, 1), + ('sfid', c_int, 1), + ('update_midi_presets', c_int, 1)) + +fluid_synth_program_select = cfunc('fluid_synth_program_select', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('sfid', c_int, 1), + ('bank', c_int, 1), + ('preset', c_int, 1)) + +fluid_synth_noteon = cfunc('fluid_synth_noteon', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('key', c_int, 1), + ('vel', c_int, 1)) + +fluid_synth_noteoff = cfunc('fluid_synth_noteoff', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('key', c_int, 1)) + +fluid_synth_pitch_bend = cfunc('fluid_synth_pitch_bend', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('val', c_int, 1)) + +fluid_synth_cc = cfunc('fluid_synth_cc', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('ctrl', c_int, 1), + ('val', c_int, 1)) + +fluid_synth_get_cc = cfunc('fluid_synth_get_cc', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('num', c_int, 1), + ('pval', POINTER(c_int), 1)) + +fluid_synth_program_change = cfunc('fluid_synth_program_change', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('prg', c_int, 1)) + +fluid_synth_unset_program = cfunc('fluid_synth_unset_program', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1)) + +fluid_synth_get_program = cfunc('fluid_synth_get_program', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('sfont_id', POINTER(c_int), 1), + ('bank_num', POINTER(c_int), 1), + ('preset_num', POINTER(c_int), 1)) + +fluid_synth_bank_select = cfunc('fluid_synth_bank_select', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('bank', c_int, 1)) + +fluid_synth_sfont_select = cfunc('fluid_synth_sfont_select', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('sfid', c_int, 1)) + +fluid_synth_program_reset = cfunc('fluid_synth_program_reset', c_int, + ('synth', c_void_p, 1)) + +fluid_synth_system_reset = cfunc('fluid_synth_system_reset', c_int, + ('synth', c_void_p, 1)) + +fluid_synth_write_s16 = cfunc('fluid_synth_write_s16', c_void_p, + ('synth', c_void_p, 1), + ('len', c_int, 1), + ('lbuf', c_void_p, 1), + ('loff', c_int, 1), + ('lincr', c_int, 1), + ('rbuf', c_void_p, 1), + ('roff', c_int, 1), + ('rincr', c_int, 1)) + +fluid_synth_all_notes_off = cfunc('fluid_synth_all_notes_off', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1)) + +fluid_synth_all_sounds_off = cfunc('fluid_synth_all_sounds_off', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1)) + + +class fluid_synth_channel_info_t(Structure): + _fields_ = [ + ('assigned', c_int), + ('sfont_id', c_int), + ('bank', c_int), + ('program', c_int), + ('name', c_char*32), + ('reserved', c_char*32)] + +fluid_synth_get_channel_info = cfunc('fluid_synth_get_channel_info', c_int, + ('synth', c_void_p, 1), + ('chan', c_int, 1), + ('info', POINTER(fluid_synth_channel_info_t), 1)) + +fluid_synth_set_reverb_full = cfunc('fluid_synth_set_reverb_full', c_int, + ('synth', c_void_p, 1), + ('set', c_int, 1), + ('roomsize', c_double, 1), + ('damping', c_double, 1), + ('width', c_double, 1), + ('level', c_double, 1)) + +fluid_synth_set_chorus_full = cfunc('fluid_synth_set_chorus_full', c_int, + ('synth', c_void_p, 1), + ('set', c_int, 1), + ('nr', c_int, 1), + ('level', c_double, 1), + ('speed', c_double, 1), + ('depth_ms', c_double, 1), + ('type', c_int, 1)) + +fluid_synth_set_reverb = cfunc('fluid_synth_set_reverb', c_int, + ('synth', c_void_p, 1), + ('roomsize', c_double, 1), + ('damping', c_double, 1), + ('width', c_double, 1), + ('level', c_double, 1)) + +fluid_synth_set_chorus = cfunc('fluid_synth_set_chorus', c_int, + ('synth', c_void_p, 1), + ('nr', c_int, 1), + ('level', c_double, 1), + ('speed', c_double, 1), + ('depth_ms', c_double, 1), + ('type', c_int, 1)) + +fluid_synth_set_reverb_roomsize = cfunc('fluid_synth_set_reverb_roomsize', c_int, + ('synth', c_void_p, 1), + ('roomsize', c_double, 1)) + +fluid_synth_set_reverb_damp = cfunc('fluid_synth_set_reverb_damp', c_int, + ('synth', c_void_p, 1), + ('damping', c_double, 1)) + +fluid_synth_set_reverb_level = cfunc('fluid_synth_set_reverb_level', c_int, + ('synth', c_void_p, 1), + ('level', c_double, 1)) + +fluid_synth_set_reverb_width = cfunc('fluid_synth_set_reverb_width', c_int, + ('synth', c_void_p, 1), + ('width', c_double, 1)) + +fluid_synth_set_chorus_nr = cfunc('fluid_synth_set_chorus_nr', c_int, + ('synth', c_void_p, 1), + ('nr', c_int, 1)) + +fluid_synth_set_chorus_level = cfunc('fluid_synth_set_chorus_level', c_int, + ('synth', c_void_p, 1), + ('level', c_double, 1)) + +fluid_synth_set_chorus_type = cfunc('fluid_synth_set_chorus_type', c_int, + ('synth', c_void_p, 1), + ('type', c_int, 1)) +fluid_synth_get_reverb_roomsize = cfunc('fluid_synth_get_reverb_roomsize', c_double, + ('synth', c_void_p, 1)) + +fluid_synth_get_reverb_damp = cfunc('fluid_synth_get_reverb_damp', c_double, + ('synth', c_void_p, 1)) + +fluid_synth_get_reverb_level = cfunc('fluid_synth_get_reverb_level', c_double, + ('synth', c_void_p, 1)) + +fluid_synth_get_reverb_width = cfunc('fluid_synth_get_reverb_width', c_double, + ('synth', c_void_p, 1)) + + +fluid_synth_get_chorus_nr = cfunc('fluid_synth_get_chorus_nr', c_int, + ('synth', c_void_p, 1)) + +fluid_synth_get_chorus_level = cfunc('fluid_synth_get_chorus_level', c_double, + ('synth', c_void_p, 1)) + +fluid_synth_get_chorus_speed_Hz = cfunc('fluid_synth_get_chorus_speed_Hz', c_double, + ('synth', c_void_p, 1)) + +fluid_synth_get_chorus_depth_ms = cfunc('fluid_synth_get_chorus_depth_ms', c_double, + ('synth', c_void_p, 1)) + +fluid_synth_get_chorus_type = cfunc('fluid_synth_get_chorus_type', c_int, + ('synth', c_void_p, 1)) + +fluid_synth_set_midi_router = cfunc('fluid_synth_set_midi_router', None, + ('synth', c_void_p, 1), + ('router', c_void_p, 1)) + +fluid_synth_handle_midi_event = cfunc('fluid_synth_handle_midi_event', c_int, + ('data', c_void_p, 1), + ('event', c_void_p, 1)) + +# fluid sequencer +new_fluid_sequencer2 = cfunc('new_fluid_sequencer2', c_void_p, + ('use_system_timer', c_int, 1)) + +fluid_sequencer_process = cfunc('fluid_sequencer_process', None, + ('seq', c_void_p, 1), + ('msec', c_uint, 1)) + +fluid_sequencer_register_fluidsynth = cfunc('fluid_sequencer_register_fluidsynth', c_short, + ('seq', c_void_p, 1), + ('synth', c_void_p, 1)) + +fluid_sequencer_register_client = cfunc('fluid_sequencer_register_client', c_short, + ('seq', c_void_p, 1), + ('name', c_char_p, 1), + ('callback', CFUNCTYPE(None, c_uint, c_void_p, c_void_p, c_void_p), 1), + ('data', c_void_p, 1)) + +fluid_sequencer_get_tick = cfunc('fluid_sequencer_get_tick', c_uint, + ('seq', c_void_p, 1)) + +fluid_sequencer_set_time_scale = cfunc('fluid_sequencer_set_time_scale', None, + ('seq', c_void_p, 1), + ('scale', c_double, 1)) + +fluid_sequencer_get_time_scale = cfunc('fluid_sequencer_get_time_scale', c_double, + ('seq', c_void_p, 1)) + +fluid_sequencer_send_at = cfunc('fluid_sequencer_send_at', c_int, + ('seq', c_void_p, 1), + ('evt', c_void_p, 1), + ('time', c_uint, 1), + ('absolute', c_int, 1)) + + +delete_fluid_sequencer = cfunc('delete_fluid_sequencer', None, + ('seq', c_void_p, 1)) + +# fluid event +new_fluid_event = cfunc('new_fluid_event', c_void_p) + +fluid_event_set_source = cfunc('fluid_event_set_source', None, + ('evt', c_void_p, 1), + ('src', c_void_p, 1)) + +fluid_event_set_dest = cfunc('fluid_event_set_dest', None, + ('evt', c_void_p, 1), + ('dest', c_void_p, 1)) + +fluid_event_timer = cfunc('fluid_event_timer', None, + ('evt', c_void_p, 1), + ('data', c_void_p, 1)) + +fluid_event_note = cfunc('fluid_event_note', None, + ('evt', c_void_p, 1), + ('channel', c_int, 1), + ('key', c_short, 1), + ('vel', c_short, 1), + ('duration', c_uint, 1)) + +fluid_event_noteon = cfunc('fluid_event_noteon', None, + ('evt', c_void_p, 1), + ('channel', c_int, 1), + ('key', c_short, 1), + ('vel', c_short, 1)) + +fluid_event_noteoff = cfunc('fluid_event_noteoff', None, + ('evt', c_void_p, 1), + ('channel', c_int, 1), + ('key', c_short, 1)) + +delete_fluid_event = cfunc('delete_fluid_event', None, + ('evt', c_void_p, 1)) + +fluid_midi_event_get_channel = cfunc('fluid_midi_event_get_channel', c_int, + ('evt', c_void_p, 1)) + +fluid_midi_event_get_control = cfunc('fluid_midi_event_get_control', c_int, + ('evt', c_void_p, 1)) + +fluid_midi_event_get_program = cfunc('fluid_midi_event_get_program', c_int, + ('evt', c_void_p, 1)) + +fluid_midi_event_get_key = cfunc('fluid_midi_event_get_key', c_int, + ('evt', c_void_p, 1)) + +fluid_midi_event_get_type = cfunc('fluid_midi_event_get_type', c_int, + ('evt', c_void_p, 1)) + +fluid_midi_event_get_value = cfunc('fluid_midi_event_get_value', c_int, + ('evt', c_void_p, 1)) + +fluid_midi_event_get_velocity = cfunc('fluid_midi_event_get_velocity', c_int, + ('evt', c_void_p, 1)) + +# fluid_player_status returned by fluid_player_get_status() +FLUID_PLAYER_READY = 0 +FLUID_PLAYER_PLAYING = 1 +FLUID_PLAYER_STOPPING = 2 +FLUID_PLAYER_DONE = 3 + +# tempo_type used by fluid_player_set_tempo() +FLUID_PLAYER_TEMPO_INTERNAL = 0 +FLUID_PLAYER_TEMPO_EXTERNAL_BPM = 1 +FLUID_PLAYER_TEMPO_EXTERNAL_MIDI = 2 + +new_fluid_player = cfunc('new_fluid_player', c_void_p, + ('synth', c_void_p, 1)) + +delete_fluid_player = cfunc('delete_fluid_player', None, + ('player', c_void_p, 1)) + +fluid_player_add = cfunc('fluid_player_add', c_int, + ('player', c_void_p, 1), + ('filename', c_char_p, 1)) + + +fluid_player_get_status = cfunc('fluid_player_get_status', c_int, + ('player', c_void_p, 1)) +fluid_player_join = cfunc('fluid_player_join', c_int, + ('player', c_void_p, 1)) + +fluid_player_play = cfunc('fluid_player_play', c_int, + ('player', c_void_p, 1)) + +fluid_player_set_playback_callback = cfunc('fluid_player_set_playback_callback', c_int, + ('player', c_void_p, 1), + ('handler', CFUNCTYPE(c_int, c_void_p, c_void_p), 1), + ('event_handler_data', c_void_p, 1)) + +fluid_player_set_tempo = cfunc('fluid_player_set_tempo', c_int, + ('player', c_void_p, 1), + ('tempo_type', c_int, 1), + ('tempo', c_double, 1)) + +fluid_player_seek = cfunc('fluid_player_seek', c_int, + ('player', c_void_p, 1), + ('ticks', c_int, 1)) + +fluid_player_stop = cfunc('fluid_player_stop', c_int, + ('player', c_void_p, 1)) + +# fluid audio driver +new_fluid_audio_driver = cfunc('new_fluid_audio_driver', c_void_p, + ('settings', c_void_p, 1), + ('synth', c_void_p, 1)) + +delete_fluid_audio_driver = cfunc('delete_fluid_audio_driver', None, + ('driver', c_void_p, 1)) + +# fluid midi driver +new_fluid_midi_driver = cfunc('new_fluid_midi_driver', c_void_p, + ('settings', c_void_p, 1), + ('handler', CFUNCTYPE(c_int, c_void_p, c_void_p), 1), + ('event_handler_data', c_void_p, 1)) + + +# fluid midi router rule +class fluid_midi_router_t(Structure): + _fields_ = [ + ('synth', c_void_p), + ('rules_mutex', c_void_p), + ('rules', c_void_p*6), + ('free_rules', c_void_p), + ('event_handler', c_void_p), + ('event_handler_data', c_void_p), + ('nr_midi_channels', c_int), + ('cmd_rule', c_void_p), + ('cmd_rule_type', POINTER(c_int))] + +delete_fluid_midi_router_rule = cfunc('delete_fluid_midi_router_rule', c_int, + ('rule', c_void_p, 1)) + +new_fluid_midi_router_rule = cfunc('new_fluid_midi_router_rule', c_void_p) + +fluid_midi_router_rule_set_chan = cfunc('fluid_midi_router_rule_set_chan', None, + ('rule', c_void_p, 1), + ('min', c_int, 1), + ('max', c_int, 1), + ('mul', c_float, 1), + ('add', c_int, 1)) + +fluid_midi_router_rule_set_param1 = cfunc('fluid_midi_router_rule_set_param1', None, + ('rule', c_void_p, 1), + ('min', c_int, 1), + ('max', c_int, 1), + ('mul', c_float, 1), + ('add', c_int, 1)) + +fluid_midi_router_rule_set_param2 = cfunc('fluid_midi_router_rule_set_param2', None, + ('rule', c_void_p, 1), + ('min', c_int, 1), + ('max', c_int, 1), + ('mul', c_float, 1), + ('add', c_int, 1)) + +# fluid midi router +new_fluid_midi_router = cfunc('new_fluid_midi_router', POINTER(fluid_midi_router_t), + ('settings', c_void_p, 1), + ('handler', CFUNCTYPE(c_int, c_void_p, c_void_p), 1), + ('event_handler_data', c_void_p, 1)) + +fluid_midi_router_handle_midi_event = cfunc('fluid_midi_router_handle_midi_event', c_int, + ('data', c_void_p, 1), + ('event', c_void_p, 1)) + +fluid_midi_router_clear_rules = cfunc('fluid_midi_router_clear_rules', c_int, + ('router', POINTER(fluid_midi_router_t), 1)) + +fluid_midi_router_set_default_rules = cfunc('fluid_midi_router_set_default_rules', c_int, + ('router', POINTER(fluid_midi_router_t), 1)) + +fluid_midi_router_add_rule = cfunc('fluid_midi_router_add_rule', c_int, + ('router', POINTER(fluid_midi_router_t), 1), + ('rule', c_void_p, 1), + ('type', c_int, 1)) + +# fluidsynth 2.x +new_fluid_cmd_handler=cfunc('new_fluid_cmd_handler', c_void_p, + ('synth', c_void_p, 1), + ('router', c_void_p, 1)) + +fluid_synth_get_sfont_by_id = cfunc('fluid_synth_get_sfont_by_id', c_void_p, + ('synth', c_void_p, 1), + ('id', c_int, 1)) + +fluid_sfont_get_preset = cfunc('fluid_sfont_get_preset', c_void_p, + ('sfont', c_void_p, 1), + ('banknum', c_int, 1), + ('prenum', c_int, 1)) + +fluid_preset_get_name = cfunc('fluid_preset_get_name', c_char_p, + ('preset', c_void_p, 1)) + +fluid_synth_set_reverb = cfunc('fluid_synth_set_reverb', c_int, + ('synth', c_void_p, 1), + ('roomsize', c_double, 1), + ('damping', c_double, 1), + ('width', c_double, 1), + ('level', c_double, 1)) + +fluid_synth_set_chorus = cfunc('fluid_synth_set_chorus', c_int, + ('synth', c_void_p, 1), + ('nr', c_int, 1), + ('level', c_double, 1), + ('speed', c_double, 1), + ('depth_ms', c_double, 1), + ('type', c_int, 1)) + +fluid_synth_get_chorus_speed = cfunc('fluid_synth_get_chorus_speed', c_double, + ('synth', c_void_p, 1)) + +fluid_synth_get_chorus_depth = cfunc('fluid_synth_get_chorus_depth', c_double, + ('synth', c_void_p, 1)) + + +def fluid_synth_write_s16_stereo(synth, len): + """Return generated samples in stereo 16-bit format + + Return value is a Numpy array of samples. + + """ + import numpy + buf = create_string_buffer(len * 4) + fluid_synth_write_s16(synth, len, buf, 0, 2, buf, 1, 2) + return numpy.frombuffer(buf[:], dtype=numpy.int16) + + +# Object-oriented interface, simplifies access to functions + +class Synth: + """Synth represents a FluidSynth synthesizer""" + def __init__(self, gain=0.2, samplerate=44100, channels=256, **kwargs): + """Create new synthesizer object to control sound generation + + Optional keyword arguments: + gain : scale factor for audio output, default is 0.2 + lower values are quieter, allow more simultaneous notes + samplerate : output samplerate in Hz, default is 44100 Hz + added capability for passing arbitrary fluid settings using args + """ + self.settings = new_fluid_settings() + self.setting('synth.gain', gain) + self.setting('synth.sample-rate', float(samplerate)) + self.setting('synth.midi-channels', channels) + for opt,val in kwargs.items(): + self.setting(opt, val) + self.synth = new_fluid_synth(self.settings) + self.audio_driver = None + self.midi_driver = None + self.router = None + def setting(self, opt, val): + """change an arbitrary synth setting, type-smart""" + if isinstance(val, (str, bytes)): + fluid_settings_setstr(self.settings, opt.encode(), val.encode()) + elif isinstance(val, int): + fluid_settings_setint(self.settings, opt.encode(), val) + elif isinstance(val, float): + fluid_settings_setnum(self.settings, opt.encode(), c_double(val)) + def get_setting(self, opt): + """get current value of an arbitrary synth setting""" + val = c_int() + if fluid_settings_getint(self.settings, opt.encode(), byref(val)) == FLUIDSETTING_EXISTS: + return val.value + strval = create_string_buffer(32) + if fluid_settings_copystr(self.settings, opt.encode(), strval, 32) == FLUIDSETTING_EXISTS: + return strval.value.decode() + num = c_double() + if fluid_settings_getnum(self.settings, opt.encode(), byref(num)) == FLUIDSETTING_EXISTS: + return round(num.value, 6) + return None + + def start(self, driver=None, device=None, midi_driver=None, midi_router=None): + """Start audio output driver in separate background thread + + Call this function any time after creating the Synth object. + If you don't call this function, use get_samples() to generate + samples. + + Optional keyword argument: + driver : which audio driver to use for output + device : the device to use for audio output + midi_driver : the midi driver to use for communicating with midi devices + see http://www.fluidsynth.org/api/fluidsettings.xml for allowed values and defaults by platform + """ + driver = driver or self.get_setting('audio.driver') + device = device or self.get_setting('audio.%s.device' % driver) + midi_driver = midi_driver or self.get_setting('midi.driver') + + self.setting('audio.driver', driver) + self.setting('audio.%s.device' % driver, device) + self.audio_driver = new_fluid_audio_driver(self.settings, self.synth) + self.setting('midi.driver', midi_driver) + self.router = new_fluid_midi_router(self.settings, fluid_synth_handle_midi_event, self.synth) + if new_fluid_cmd_handler: + new_fluid_cmd_handler(self.synth, self.router) + else: + fluid_synth_set_midi_router(self.synth, self.router) + if midi_router == None: ## Use fluidsynth to create a MIDI event handler + self.midi_driver = new_fluid_midi_driver(self.settings, fluid_midi_router_handle_midi_event, self.router) + self.custom_router_callback = None + else: ## Supply an external MIDI event handler + self.custom_router_callback = CFUNCTYPE(c_int, c_void_p, c_void_p)(midi_router) + self.midi_driver = new_fluid_midi_driver(self.settings, self.custom_router_callback, self.router) + return FLUID_OK + + def delete(self): + if self.audio_driver: + delete_fluid_audio_driver(self.audio_driver) + delete_fluid_synth(self.synth) + delete_fluid_settings(self.settings) + def sfload(self, filename, update_midi_preset=0): + """Load SoundFont and return its ID""" + return fluid_synth_sfload(self.synth, filename.encode(), update_midi_preset) + def sfunload(self, sfid, update_midi_preset=0): + """Unload a SoundFont and free memory it used""" + return fluid_synth_sfunload(self.synth, sfid, update_midi_preset) + def program_select(self, chan, sfid, bank, preset): + """Select a program""" + return fluid_synth_program_select(self.synth, chan, sfid, bank, preset) + def program_unset(self, chan): + """Set the preset of a MIDI channel to an unassigned state""" + return fluid_synth_unset_program(self.synth, chan) + def channel_info(self, chan): + """get soundfont, bank, prog, preset name of channel""" + if fluid_synth_get_channel_info is not None: + info=fluid_synth_channel_info_t() + fluid_synth_get_channel_info(self.synth, chan, byref(info)) + return (info.sfont_id, info.bank, info.program, info.name) + else: + (sfontid, banknum, presetnum) = self.program_info(chan) + presetname = self.sfpreset_name(sfontid, banknum, presetnum) + return (sfontid, banknum, presetnum, presetname) + def program_info(self, chan): + """get active soundfont, bank, prog on a channel""" + if fluid_synth_get_program is not None: + sfontid=c_int() + banknum=c_int() + presetnum=c_int() + fluid_synth_get_program(self.synth, chan, byref(sfontid), byref(banknum), byref(presetnum)) + return (sfontid.value, banknum.value, presetnum.value) + else: + (sfontid, banknum, prognum, presetname) = self.channel_info(chan) + return (sfontid, banknum, prognum) + def sfpreset_name(self, sfid, bank, prenum): + """Return name of a soundfont preset""" + if fluid_synth_get_sfont_by_id is not None: + sfont=fluid_synth_get_sfont_by_id(self.synth, sfid) + preset=fluid_sfont_get_preset(sfont, bank, prenum) + if not preset: + return None + return fluid_preset_get_name(preset).decode('ascii') + else: + (sfontid, banknum, presetnum, presetname) = self.channel_info(chan) + return presetname + def router_clear(self): + if self.router is not None: + fluid_midi_router_clear_rules(self.router) + def router_default(self): + if self.router is not None: + fluid_midi_router_set_default_rules(self.router) + def router_begin(self, type): + """types are [note|cc|prog|pbend|cpress|kpress]""" + if self.router is not None: + if type=='note': + self.router.cmd_rule_type=0 + elif type=='cc': + self.router.cmd_rule_type=1 + elif type=='prog': + self.router.cmd_rule_type=2 + elif type=='pbend': + self.router.cmd_rule_type=3 + elif type=='cpress': + self.router.cmd_rule_type=4 + elif type=='kpress': + self.router.cmd_rule_type=5 + if 'self.router.cmd_rule' in globals(): + delete_fluid_midi_router_rule(self.router.cmd_rule) + self.router.cmd_rule = new_fluid_midi_router_rule() + def router_end(self): + if self.router is not None: + if self.router.cmd_rule is None: + return + if fluid_midi_router_add_rule(self.router, self.router.cmd_rule, self.router.cmd_rule_type)<0: + delete_fluid_midi_router_rule(self.router.cmd_rule) + self.router.cmd_rule=None + def router_chan(self, min, max, mul, add): + if self.router is not None: + fluid_midi_router_rule_set_chan(self.router.cmd_rule, min, max, mul, add) + def router_par1(self, min, max, mul, add): + if self.router is not None: + fluid_midi_router_rule_set_param1(self.router.cmd_rule, min, max, mul, add) + def router_par2(self, min, max, mul, add): + if self.router is not None: + fluid_midi_router_rule_set_param2(self.router.cmd_rule, min, max, mul, add) + def set_reverb(self, roomsize=-1.0, damping=-1.0, width=-1.0, level=-1.0): + """ + roomsize Reverb room size value (0.0-1.0) + damping Reverb damping value (0.0-1.0) + width Reverb width value (0.0-100.0) + level Reverb level value (0.0-1.0) + """ + if fluid_synth_set_reverb is not None: + return fluid_synth_set_reverb(self.synth, roomsize, damping, width, level) + else: + set=0 + if roomsize>=0: + set+=0b0001 + if damping>=0: + set+=0b0010 + if width>=0: + set+=0b0100 + if level>=0: + set+=0b1000 + return fluid_synth_set_reverb_full(self.synth, set, roomsize, damping, width, level) + def set_chorus(self, nr=-1, level=-1.0, speed=-1.0, depth=-1.0, type=-1): + """ + nr Chorus voice count (0-99, CPU time consumption proportional to this value) + level Chorus level (0.0-10.0) + speed Chorus speed in Hz (0.29-5.0) + depth_ms Chorus depth (max value depends on synth sample rate, 0.0-21.0 is safe for sample rate values up to 96KHz) + type Chorus waveform type (0=sine, 1=triangle) + """ + if fluid_synth_set_chorus is not None: + return fluid_synth_set_chorus(self.synth, nr, level, speed, depth, type) + else: + set=0 + if nr>=0: + set+=0b00001 + if level>=0: + set+=0b00010 + if speed>=0: + set+=0b00100 + if depth>=0: + set+=0b01000 + if type>=0: + set+=0b10000 + return fluid_synth_set_chorus_full(self.synth, set, nr, level, speed, depth, type) + def set_reverb_roomsize(self, roomsize): + if fluid_synth_set_reverb_roomsize is not None: + return fluid_synth_set_reverb_roomsize(self.synth, roomsize) + else: + return self.set_reverb(roomsize=roomsize) + def set_reverb_damp(self, damping): + if fluid_synth_set_reverb_damp is not None: + return fluid_synth_set_reverb_damp(self.synth, damping) + else: + return self.set_reverb(damping=damping) + def set_reverb_level(self, level): + if fluid_synth_set_reverb_level is not None: + return fluid_synth_set_reverb_level(self.synth, level) + else: + return self.set_reverb(level=level) + def set_reverb_width(self, width): + if fluid_synth_set_reverb_width is not None: + return fluid_synth_set_reverb_width(self.synth, width) + else: + return self.set_reverb(width=width) + def set_chorus_nr(self, nr): + if fluid_synth_set_chorus_nr is not None: + return fluid_synth_set_chorus_nr(self.synth, nr) + else: + return self.set_chorus(nr=nr) + def set_chorus_level(self, level): + if fluid_synth_set_chorus_level is not None: + return fluid_synth_set_chorus_level(self.synth, level) + else: + return self.set_chorus(leve=level) + def set_chorus_speed(self, speed): + if fluid_synth_set_chorus_speed is not None: + return fluid_synth_set_chorus_speed(self.synth, speed) + else: + return self.set_chorus(speed=speed) + def set_chorus_depth(self, depth): + if fluid_synth_set_chorus_depth is not None: + return fluid_synth_set_chorus_depth(self.synth, depth) + else: + return self.set_chorus(depth=depth) + def set_chorus_type(self, type): + if fluid_synth_set_chorus_type is not None: + return fluid_synth_set_chorus_type(self.synth, type) + else: + return self.set_chorus(type=type) + def get_reverb_roomsize(self): + return fluid_synth_get_reverb_roomsize(self.synth) + def get_reverb_damp(self): + return fluid_synth_get_reverb_damp(self.synth) + def get_reverb_level(self): + return fluid_synth_get_reverb_level(self.synth) + def get_reverb_width(self): + return fluid_synth_get_reverb_width(self.synth) + def get_chorus_nr(self): + return fluid_synth_get_chorus_nr(self.synth) + def get_chorus_level(self): + return fluid_synth_get_reverb_level(self.synth) + def get_chorus_speed(self): + if fluid_synth_get_chorus_speed is not None: + return fluid_synth_get_chorus_speed(self.synth) + else: + return fluid_synth_get_chorus_speed_Hz(self.synth) + def get_chorus_depth(self): + if fluid_synth_get_chorus_depth is not None: + return fluid_synth_get_chorus_depth(self.synth) + else: + return fluid_synth_get_chorus_depth_ms(self.synth) + def get_chorus_type(self): + return fluid_synth_get_chorus_type(self.synth) + def noteon(self, chan, key, vel): + """Play a note""" + if key < 0 or key > 127: + return False + if chan < 0: + return False + if vel < 0 or vel > 127: + return False + return fluid_synth_noteon(self.synth, chan, key, vel) + def noteoff(self, chan, key): + """Stop a note""" + if key < 0 or key > 127: + return False + if chan < 0: + return False + return fluid_synth_noteoff(self.synth, chan, key) + def pitch_bend(self, chan, val): + """Adjust pitch of a playing channel by small amounts + + A pitch bend value of 0 is no pitch change from default. + A value of -2048 is 1 semitone down. + A value of 2048 is 1 semitone up. + Maximum values are -8192 to +8192 (transposing by 4 semitones). + + """ + return fluid_synth_pitch_bend(self.synth, chan, val + 8192) + def cc(self, chan, ctrl, val): + """Send control change value + + The controls that are recognized are dependent on the + SoundFont. Values are always 0 to 127. Typical controls + include: + 1 : vibrato + 7 : volume + 10 : pan (left to right) + 11 : expression (soft to loud) + 64 : sustain + 91 : reverb + 93 : chorus + """ + return fluid_synth_cc(self.synth, chan, ctrl, val) + def get_cc(self, chan, num): + i=c_int() + fluid_synth_get_cc(self.synth, chan, num, byref(i)) + return i.value + def program_change(self, chan, prg): + """Change the program""" + return fluid_synth_program_change(self.synth, chan, prg) + def bank_select(self, chan, bank): + """Choose a bank""" + return fluid_synth_bank_select(self.synth, chan, bank) + def all_notes_off(self, chan): + """Turn off all notes on a channel (release all keys)""" + return fluid_synth_all_notes_off(self.synth, chan) + def all_sounds_off(self, chan): + """Turn off all sounds on a channel (equivalent to mute)""" + return fluid_synth_all_sounds_off(self.synth, chan) + def sfont_select(self, chan, sfid): + """Choose a SoundFont""" + return fluid_synth_sfont_select(self.synth, chan, sfid) + def program_reset(self): + """Reset the programs on all channels""" + return fluid_synth_program_reset(self.synth) + def system_reset(self): + """Stop all notes and reset all programs""" + return fluid_synth_system_reset(self.synth) + def get_samples(self, len=1024): + """Generate audio samples + + The return value will be a NumPy array containing the given + length of audio samples. If the synth is set to stereo output + (the default) the array will be size 2 * len. + + """ + return fluid_synth_write_s16_stereo(self.synth, len) + def tuning_dump(self, bank, prog, pitch): + return fluid_synth_tuning_dump(self.synth, bank, prog, name.encode(), length(name), pitch) + + def midi_event_get_type(self, event): + return fluid_midi_event_get_type(event) + def midi_event_get_velocity(self, event): + return fluid_midi_event_get_velocity(event) + def midi_event_get_key(self, event): + return fluid_midi_event_get_key(event) + def midi_event_get_channel(self, event): + return fluid_midi_event_get_channel(event) + def midi_event_get_control(self, event): + return fluid_midi_event_get_control(event) + def midi_event_get_program(self, event): + return fluid_midi_event_get_program(event) + def midi_event_get_value(self, event): + return fluid_midi_event_get_value(event) + + def play_midi_file(self, filename): + self.player = new_fluid_player(self.synth) + if self.player == None: return FLUID_FAILED + if self.custom_router_callback != None: + fluid_player_set_playback_callback(self.player, self.custom_router_callback, self.synth) + status = fluid_player_add(self.player, filename.encode()) + if status == FLUID_FAILED: return status + status = fluid_player_play(self.player) + return status + + def play_midi_stop(self): + status = fluid_player_stop(self.player) + if status == FLUID_FAILED: return status + status = fluid_player_seek(self.player, 0) + delete_fluid_player(self.player) + return status + + def player_set_tempo(self, tempo_type, tempo): + return fluid_player_set_tempo(self.player, tempo_type, tempo) + + + +class Sequencer: + def __init__(self, time_scale=1000, use_system_timer=True): + """Create new sequencer object to control and schedule timing of midi events + + Optional keyword arguments: + time_scale: ticks per second, defaults to 1000 + use_system_timer: whether the sequencer should advance by itself + """ + self.client_callbacks = [] + self.sequencer = new_fluid_sequencer2(use_system_timer) + fluid_sequencer_set_time_scale(self.sequencer, time_scale) + + def register_fluidsynth(self, synth): + response = fluid_sequencer_register_fluidsynth(self.sequencer, synth.synth) + if response == FLUID_FAILED: + raise Error("Registering fluid synth failed") + return response + + def register_client(self, name, callback, data=None): + c_callback = CFUNCTYPE(None, c_uint, c_void_p, c_void_p, c_void_p)(callback) + response = fluid_sequencer_register_client(self.sequencer, name.encode(), c_callback, data) + if response == FLUID_FAILED: + raise Error("Registering client failed") + + # store in a list to prevent garbage collection + self.client_callbacks.append(c_callback) + + return response + + def note(self, time, channel, key, velocity, duration, source=-1, dest=-1, absolute=True): + evt = self._create_event(source, dest) + fluid_event_note(evt, channel, key, velocity, duration) + self._schedule_event(evt, time, absolute) + delete_fluid_event(evt) + + def note_on(self, time, channel, key, velocity=127, source=-1, dest=-1, absolute=True): + evt = self._create_event(source, dest) + fluid_event_noteon(evt, channel, key, velocity) + self._schedule_event(evt, time, absolute) + delete_fluid_event(evt) + + def note_off(self, time, channel, key, source=-1, dest=-1, absolute=True): + evt = self._create_event(source, dest) + fluid_event_noteoff(evt, channel, key) + self._schedule_event(evt, time, absolute) + delete_fluid_event(evt) + + def timer(self, time, data=None, source=-1, dest=-1, absolute=True): + evt = self._create_event(source, dest) + fluid_event_timer(evt, data) + self._schedule_event(evt, time, absolute) + delete_fluid_event(evt) + + def _create_event(self, source=-1, dest=-1): + evt = new_fluid_event() + fluid_event_set_source(evt, source) + fluid_event_set_dest(evt, dest) + return evt + + def _schedule_event(self, evt, time, absolute=True): + response = fluid_sequencer_send_at(self.sequencer, evt, time, absolute) + if response == FLUID_FAILED: + raise Error("Scheduling event failed") + + def get_tick(self): + return fluid_sequencer_get_tick(self.sequencer) + + def process(self, msec): + fluid_sequencer_process(self.sequencer, msec) + + def delete(self): + delete_fluid_sequencer(self.sequencer) + +def raw_audio_string(data): + """Return a string of bytes to send to soundcard + + Input is a numpy array of samples. Default output format + is 16-bit signed (other formats not currently supported). + + """ + import numpy + return (data.astype(numpy.int16)).tostring() + +#=============================================================================== + +import numpy as np +import wave + +def midi_opus_to_colab_audio(midi_opus, + soundfont_path='/usr/share/sounds/sf2/FluidR3_GM.sf2', + sample_rate=16000, # 44100 + volume_scale=10, + trim_silence=True, + silence_threshold=0.1, + output_for_gradio=False, + write_audio_to_WAV='' + ): + + def normalize_volume(matrix, factor=10): + norm = np.linalg.norm(matrix) + matrix = matrix/norm # normalized matrix + mult_matrix = matrix * factor + final_matrix = np.clip(mult_matrix, -1.0, 1.0) + return final_matrix + + if midi_opus[1]: + + ticks_per_beat = midi_opus[0] + event_list = [] + for track_idx, track in enumerate(midi_opus[1:]): + abs_t = 0 + for event in track: + abs_t += event[1] + event_new = [*event] + event_new[1] = abs_t + event_list.append(event_new) + event_list = sorted(event_list, key=lambda e: e[1]) + + tempo = int((60 / 120) * 10 ** 6) # default 120 bpm + ss = np.empty((0, 2), dtype=np.int16) + fl = Synth(samplerate=float(sample_rate)) + sfid = fl.sfload(soundfont_path) + last_t = 0 + for c in range(16): + fl.program_select(c, sfid, 128 if c == 9 else 0, 0) + for event in event_list: + name = event[0] + sample_len = int(((event[1] / ticks_per_beat) * tempo / (10 ** 6)) * sample_rate) + sample_len -= int(((last_t / ticks_per_beat) * tempo / (10 ** 6)) * sample_rate) + last_t = event[1] + if sample_len > 0: + sample = fl.get_samples(sample_len).reshape(sample_len, 2) + ss = np.concatenate([ss, sample]) + if name == "set_tempo": + tempo = event[2] + elif name == "patch_change": + c, p = event[2:4] + fl.program_select(c, sfid, 128 if c == 9 else 0, p) + elif name == "control_change": + c, cc, v = event[2:5] + fl.cc(c, cc, v) + elif name == "note_on" and event[3] > 0: + c, p, v = event[2:5] + fl.noteon(c, p, v) + elif name == "note_off" or (name == "note_on" and event[3] == 0): + c, p = event[2:4] + fl.noteoff(c, p) + + fl.delete() + if ss.shape[0] > 0: + max_val = np.abs(ss).max() + if max_val != 0: + ss = (ss / max_val) * np.iinfo(np.int16).max + ss = ss.astype(np.int16) + + if trim_silence: + threshold = np.std(np.abs(ss)) * silence_threshold + exceeded_thresh = np.abs(ss) > threshold + if np.any(exceeded_thresh): + last_idx = np.where(exceeded_thresh)[0][-1] + ss = ss[:last_idx+1] + + if output_for_gradio: + return ss + + ss = ss.swapaxes(1, 0) + + raw_audio = normalize_volume(ss, volume_scale) + + if write_audio_to_WAV != '': + + r_audio = raw_audio.T + + r_audio = np.int16(r_audio / np.max(np.abs(r_audio)) * 32767) + + with wave.open(write_audio_to_WAV, 'w') as wf: + wf.setframerate(sample_rate) + wf.setsampwidth(2) + wf.setnchannels(r_audio.shape[1]) + wf.writeframes(r_audio) + + return raw_audio + + else: + return None + +def midi_to_colab_audio(midi_file, + soundfont_path='/usr/share/sounds/sf2/FluidR3_GM.sf2', + sample_rate=16000, # 44100 + volume_scale=10, + trim_silence=True, + silence_threshold=0.1, + output_for_gradio=False, + write_audio_to_WAV=False + ): + + ''' + + Returns raw audio to pass to IPython.disaply.Audio func + + Example usage: + + from IPython.display import Audio + + display(Audio(raw_audio, rate=16000, normalize=False)) + + ''' + + def normalize_volume(matrix, factor=10): + norm = np.linalg.norm(matrix) + matrix = matrix/norm # normalized matrix + mult_matrix = matrix * factor + final_matrix = np.clip(mult_matrix, -1.0, 1.0) + return final_matrix + + midi_opus = midi2opus(open(midi_file, 'rb').read()) + + if midi_opus[1]: + + ticks_per_beat = midi_opus[0] + event_list = [] + for track_idx, track in enumerate(midi_opus[1:]): + abs_t = 0 + for event in track: + abs_t += event[1] + event_new = [*event] + event_new[1] = abs_t + event_list.append(event_new) + event_list = sorted(event_list, key=lambda e: e[1]) + + tempo = int((60 / 120) * 10 ** 6) # default 120 bpm + ss = np.empty((0, 2), dtype=np.int16) + fl = Synth(samplerate=float(sample_rate)) + sfid = fl.sfload(soundfont_path) + last_t = 0 + for c in range(16): + fl.program_select(c, sfid, 128 if c == 9 else 0, 0) + for event in event_list: + name = event[0] + sample_len = int(((event[1] / ticks_per_beat) * tempo / (10 ** 6)) * sample_rate) + sample_len -= int(((last_t / ticks_per_beat) * tempo / (10 ** 6)) * sample_rate) + last_t = event[1] + if sample_len > 0: + sample = fl.get_samples(sample_len).reshape(sample_len, 2) + ss = np.concatenate([ss, sample]) + if name == "set_tempo": + tempo = event[2] + elif name == "patch_change": + c, p = event[2:4] + fl.program_select(c, sfid, 128 if c == 9 else 0, p) + elif name == "control_change": + c, cc, v = event[2:5] + fl.cc(c, cc, v) + elif name == "note_on" and event[3] > 0: + c, p, v = event[2:5] + fl.noteon(c, p, v) + elif name == "note_off" or (name == "note_on" and event[3] == 0): + c, p = event[2:4] + fl.noteoff(c, p) + + fl.delete() + if ss.shape[0] > 0: + max_val = np.abs(ss).max() + if max_val != 0: + ss = (ss / max_val) * np.iinfo(np.int16).max + ss = ss.astype(np.int16) + + if trim_silence: + threshold = np.std(np.abs(ss)) * silence_threshold + exceeded_thresh = np.abs(ss) > threshold + if np.any(exceeded_thresh): + last_idx = np.where(exceeded_thresh)[0][-1] + ss = ss[:last_idx+1] + + if output_for_gradio: + return ss + + ss = ss.swapaxes(1, 0) + + raw_audio = normalize_volume(ss, volume_scale) + + if write_audio_to_WAV: + + filename = midi_file.split('.')[-2] + '.wav' + + r_audio = raw_audio.T + + r_audio = np.int16(r_audio / np.max(np.abs(r_audio)) * 32767) + + with wave.open(filename, 'w') as wf: + wf.setframerate(sample_rate) + wf.setsampwidth(2) + wf.setnchannels(r_audio.shape[1]) + wf.writeframes(r_audio) + + return raw_audio + + else: + return None + +#=================================================================================================================== \ No newline at end of file