/*
- midi.c -- implement Python midi parser module
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
-
- (c) 2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ Copyright (C) 2001--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
+
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
/*
-python2
+python
import midi
s = open ("s.midi").read ()
midi.parse_track (s)
midi.parse (s)
+
+returns a MIDI file as the tuple
+
+ ((format, division), TRACKLIST)
+
+each track is an EVENTLIST, where EVENT is
+
+ (time, (type, ARG1, [ARG2]))
+
*/
-#include "config.h"
-
-/* urg */
-#if HAVE_PYTHON2_PYTHON_H
-#include <python2/Python.h>
-#elif HAVE_PYTHON2_2_PYTHON_H
-#include <python2.2/Python.h>
-#elif HAVE_PYTHON2_1_PYTHON_H
-#include <python2.1/Python.h>
-#elif HAVE_PYTHON2_0_PYTHON_H
-#include <python2.0/Python.h>
-#elif HAVE_PYTHON1_5_PYTHON_H
-#include <python1.5/Python.h>
-#elif HAVE_PYTHON_PYTHON_H
-#define assert(x)
-#include <python/Python.h>
-#elif HAVE_PYTHON_H
-#define assert(x)
#include <Python.h>
-#else
-#error Need Python.h
+
+char *
+compat_itoa (int i)
+{
+ static char buffer[9];
+ snprintf (buffer, 8, "%d", i);
+ return buffer;
+}
+
+/* PyMIDINIT_FUNC isn't defined in Python < 2.3 */
+#ifndef PyMODINIT_FUNC
+# if defined(__cplusplus)
+# define PyMODINIT_FUNC extern "C" void
+# else /* __cplusplus */
+# define PyMODINIT_FUNC void
+# endif /* __cplusplus */
#endif
#if 0
int x = 0;
int *track = &x;
-#define debug_print(f, args...) fprintf (stderr, "%s:%d: track: %p :" f, __FUNCTION__, __LINE__, *track, ##args)
+#define urg_debug_print(f, args...) fprintf (stderr, "%s:%d: track: %p: " f, __FUNCTION__, __LINE__, *track, ##args)
+#define debug_print(f, args...) fprintf (stderr, f, ##args)
#else
#define debug_print(f, args...)
#endif
static PyObject *Midi_warning;
static PyObject *
-midi_error (char * func, char *s)
+midi_error (char const *func, char *s, char *t)
{
- char*dest = (char*) malloc (sizeof (char) * (strlen (func) + strlen (s) + 1));
+ char *dest = (char*) malloc (sizeof (char)
+ * (strlen (func) + strlen (s) + strlen (t) + 1));
strcpy (dest, func);
strcat (dest, s);
+ strcat (dest, t);
PyErr_SetString (Midi_error, dest);
free (dest);
}
static PyObject *
-midi_warning (char *s)
+midi_warning (char const *s)
{
PyErr_SetString (Midi_warning, s);
return 0;
} message_t;
message_t channelVoiceMessages[] = {
- 0x80, "NOTE_OFF",
- 0x90, "NOTE_ON",
- 0xA0, "POLYPHONIC_KEY_PRESSURE",
- 0xB0, "CONTROLLER_CHANGE",
- 0xC0, "PROGRAM_CHANGE",
- 0xD0, "CHANNEL_KEY_PRESSURE",
- 0xE0, "PITCH_BEND",
- 0,0
+ {0x80, "NOTE_OFF"},
+ {0x90, "NOTE_ON"},
+ {0xA0, "POLYPHONIC_KEY_PRESSURE"},
+ {0xB0, "CONTROLLER_CHANGE"},
+ {0xC0, "PROGRAM_CHANGE"},
+ {0xD0, "CHANNEL_KEY_PRESSURE"},
+ {0xE0, "PITCH_BEND"},
+ {0,0}
};
message_t channelModeMessages[] = {
- 0x78, "ALL_SOUND_OFF",
- 0x79, "RESET_ALL_CONTROLLERS",
- 0x7A, "LOCAL_CONTROL",
- 0x7B, "ALL_NOTES_OFF",
- 0x7C, "OMNI_MODE_OFF",
- 0x7D, "OMNI_MODE_ON",
- 0x7E, "MONO_MODE_ON",
- 0x7F, "POLY_MODE_ON",
- 0,0
+ {0x78, "ALL_SOUND_OFF"},
+ {0x79, "RESET_ALL_CONTROLLERS"},
+ {0x7A, "LOCAL_CONTROL"},
+ {0x7B, "ALL_NOTES_OFF"},
+ {0x7C, "OMNI_MODE_OFF"},
+ {0x7D, "OMNI_MODE_ON"},
+ {0x7E, "MONO_MODE_ON"},
+ {0x7F, "POLY_MODE_ON"},
+ {0,0}
};
message_t metaEvents[] = {
- 0x00, "SEQUENCE_NUMBER",
- 0x01, "TEXT_EVENT",
- 0x02, "COPYRIGHT_NOTICE",
- 0x03, "SEQUENCE_TRACK_NAME",
- 0x04, "INSTRUMENT_NAME",
- 0x05, "LYRIC",
- 0x06, "MARKER",
- 0x07, "CUE_POINT",
- 0x20, "MIDI_CHANNEL_PREFIX",
- 0x21, "MIDI_PORT",
- 0x2F, "END_OF_TRACK",
- 0x51, "SET_TEMPO",
- 0x54, "SMTPE_OFFSET",
- 0x58, "TIME_SIGNATURE",
- 0x59, "KEY_SIGNATURE",
- 0x7F, "SEQUENCER_SPECIFIC_META_EVENT",
- 0xFF, "META_EVENT",
- 0,0
+ {0x00, "SEQUENCE_NUMBER"},
+ {0x01, "TEXT_EVENT"},
+ {0x02, "COPYRIGHT_NOTICE"},
+ {0x03, "SEQUENCE_TRACK_NAME"},
+ {0x04, "INSTRUMENT_NAME"},
+ {0x05, "LYRIC"},
+ {0x06, "MARKER"},
+ {0x07, "CUE_POINT"},
+ {0x20, "MIDI_CHANNEL_PREFIX"},
+ {0x21, "MIDI_PORT"},
+ {0x2F, "END_OF_TRACK"},
+ {0x51, "SET_TEMPO"},
+ {0x54, "SMTPE_OFFSET"},
+ {0x58, "TIME_SIGNATURE"},
+ {0x59, "KEY_SIGNATURE"},
+ {0x7F, "SEQUENCER_SPECIFIC_META_EVENT"},
+ {0xFF, "META_EVENT"},
+ {0,0}
};
void
long sum = 0;
int i = 0;
- for (; i < length; i++)
+ for (; i < length &&
+ ((*str) + i < end_str); i++)
sum = (sum << 8) + (unsigned char) (*str)[i];
*str += length;
- debug_print ("%d:\n", sum);
+ debug_print ("%ld:\n", sum);
return sum;
}
get_variable_length_number (unsigned char **str, unsigned char * end_str)
{
long sum = 0;
- int i = 0;
+
while (*str < end_str)
{
unsigned char x = **str;
if (!(x & 0x80))
break;
}
- debug_print ("%d:\n", sum);
+ debug_print ("%ld:\n", sum);
return sum;
}
}
typedef PyObject* (*Read_midi_event)
- (unsigned char **track, unsigned char *end,
- unsigned char x);
+ (unsigned char **track, unsigned char *end,
+ unsigned char x);
static PyObject *
}
static PyObject *
-midi_parse_track (unsigned char **track, unsigned char *track_end)
+midi_parse_track (unsigned char **track, unsigned char *track_end, int clocks_max)
{
unsigned int time = 0;
- unsigned char running_status;
unsigned long track_len, track_size;
PyObject *pytrack = 0;
track_size = track_end - *track;
debug_print ("%s", "\n");
- if (strcmp (*track, "MTrk"))
- return midi_error (__FUNCTION__, ": MTrk expected");
+ if (memcmp (*track, "MTrk", 4))
+ {
+ *track[4] = 0;
+ return midi_error (__FUNCTION__, ": MTrk expected, got: ", *(char**)track);
+ }
*track += 4;
track_len = get_number (track, *track + 4, 4);
-
- debug_print ("track_len: %u\n", track_len);
- debug_print ("track_size: %u\n", track_size);
+ debug_print ("track_len: %lu\n", track_len);
+ debug_print ("track_size: %lu\n", track_size);
debug_print ("track begin: %p\n", track);
debug_print ("track end: %p\n", track + track_len);
if (track_len > track_size)
- return midi_error (__FUNCTION__, ": track size corrupt");
+ return midi_error (__FUNCTION__, ": track length corrupt: ", compat_itoa (track_len));
pytrack = PyList_New (0);
- track_end = *track + track_len;
+ if (*track + track_len < track_end)
+ track_end = *track + track_len;
{
PyObject *pytime = PyInt_FromLong (0L);
+ unsigned char running_status = 0;
+
while (*track < track_end)
{
long dt = get_variable_length_number(track, track_end);
time += dt;
if (dt)
pytime = PyInt_FromLong (time);
-
+ if (clocks_max && time > clocks_max)
+ break;
pyev = read_event (track, track_end, pytime,
&running_status);
if (pyev)
pymidi_parse_track (PyObject *self, PyObject *args)
{
unsigned char *track, *track_end;
- unsigned long track_size, track_len;
-
- PyObject * sobj = PyTuple_GetItem (args, 0);
+ int track_size;
+ int clocks_max;
debug_print ("%s", "\n");
- if (!PyArg_ParseTuple (args, "s#", &track, &track_size))
+ if (!PyArg_ParseTuple (args, "s#|i", &track, &track_size, &clocks_max))
return 0;
+ debug_print ("clocks_max: %d\n", clocks_max);
if (track_size < 0)
- return midi_error (__FUNCTION__, ": negative track size");
+ return midi_error (__FUNCTION__, ": negative track size: ", compat_itoa (track_size));
track_end = track + track_size;
- return midi_parse_track (&track, track_end);
+ return midi_parse_track (&track, track_end, clocks_max);
}
static PyObject *
-midi_parse (unsigned char **midi,unsigned char *midi_end)
+midi_parse (unsigned char **midi,unsigned char *midi_end, int clocks_max)
{
PyObject *pymidi = 0;
unsigned long header_len;
/* Header */
header_len = get_number (midi, *midi + 4, 4);
-
if (header_len < 6)
- return midi_error (__FUNCTION__, ": header too short");
+ return midi_error (__FUNCTION__, ": header too short: ", compat_itoa (header_len));
format = get_number (midi, *midi + 2, 2);
tracks = get_number (midi, *midi + 2, 2);
- if (tracks > 32)
- return midi_error (__FUNCTION__, ": too many tracks");
+ if (tracks > 256)
+ return midi_error (__FUNCTION__, ": too many tracks: ", compat_itoa (tracks));
division = get_number (midi, *midi + 2, 2) * 4;
+ /*
if (division < 0)
- /* return midi_error ("can't handle non-metrical time"); */
+ return midi_error (cannot handle non-metrical time");
;
+ */
*midi += header_len - 6;
pymidi = PyList_New (0);
/* Tracks */
for (i = 0; i < tracks; i++)
- PyList_Append (pymidi, midi_parse_track (midi, midi_end));
+ PyList_Append (pymidi, midi_parse_track (midi, midi_end, clocks_max));
pymidi = Py_BuildValue ("(OO)", Py_BuildValue ("(ii)", format, division),
pymidi);
pymidi_parse (PyObject *self, PyObject *args)
{
unsigned char *midi, *midi_end;
- unsigned long midi_size, midi_len;
+ unsigned long midi_size;
+ int clocks_max;
- PyObject *sobj = PyTuple_GetItem (args, 0);
-
debug_print ("%s", "\n");
- if (!PyArg_ParseTuple (args, "s#", &midi, &midi_size))
+ if (!PyArg_ParseTuple (args, "s#|i", &midi, &midi_size, &clocks_max))
return 0;
+ debug_print ("clocks_max: %d\n", clocks_max);
+
+ if (memcmp (midi, "MThd", 4))
+ {
+ midi[4] = 0;
+ return midi_error (__FUNCTION__, ": MThd expected, got: ", (char*)midi);
+ }
- if (strcmp (midi, "MThd"))
- return midi_error (__FUNCTION__, ": MThd expected");
-
midi += 4;
midi_end = midi + midi_size;
- return midi_parse (&midi, midi_end);
+ return midi_parse (&midi, midi_end, clocks_max);
}
-
static PyMethodDef MidiMethods[] =
{
- {"parse", pymidi_parse, 1},
- {"parse_track", pymidi_parse_track, 1},
+ {"parse", pymidi_parse, METH_VARARGS},
+ {"parse_track", pymidi_parse_track, METH_VARARGS},
{0, 0} /* Sentinel */
};
-initmidi ()
+PyMODINIT_FUNC
+initmidi (void)
{
PyObject *m, *d;
m = Py_InitModule ("midi", MidiMethods);
add_constants (d);
Midi_warning = PyString_FromString ("midi.warning");
PyDict_SetItemString (d, "warning", Midi_warning);
+
+ /*
+ FIXME.
+ */
+ (void) midi_warning;
}
+
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