Chris@0
|
1 /* DSSI ALSA compatibility library
|
Chris@0
|
2 *
|
Chris@0
|
3 * This library provides for non-ALSA systems the ALSA snd_seq_event_t handling
|
Chris@0
|
4 * necessary to compile and run DSSI. It was extracted from alsa-lib 1.0.8.
|
Chris@0
|
5 *
|
Chris@0
|
6 * See ./alsa/README for more information.
|
Chris@0
|
7 */
|
Chris@0
|
8
|
Chris@0
|
9 #include <stdlib.h>
|
Chris@0
|
10 #include <errno.h>
|
Chris@0
|
11
|
Chris@0
|
12 #include "alsa/asoundef.h"
|
Chris@0
|
13 #include "alsa/sound/asequencer.h"
|
Chris@0
|
14 #include "alsa/seq.h"
|
Chris@0
|
15 #include "alsa/seq_event.h"
|
Chris@0
|
16 #include "alsa/seq_midi_event.h"
|
Chris@0
|
17
|
Chris@0
|
18 /**
|
Chris@0
|
19 * \file seq/seq_event.c
|
Chris@0
|
20 * \brief Sequencer Event Types
|
Chris@0
|
21 * \author Takashi Iwai <tiwai@suse.de>
|
Chris@0
|
22 * \date 2001
|
Chris@0
|
23 */
|
Chris@0
|
24
|
Chris@0
|
25 #define FIXED_EV(x) (_SND_SEQ_TYPE(SND_SEQ_EVFLG_FIXED) | _SND_SEQ_TYPE(x))
|
Chris@0
|
26
|
Chris@0
|
27 /** Event types conversion array */
|
Chris@0
|
28 const unsigned int snd_seq_event_types[256] = {
|
Chris@0
|
29 [SND_SEQ_EVENT_SYSTEM ... SND_SEQ_EVENT_RESULT]
|
Chris@0
|
30 = FIXED_EV(SND_SEQ_EVFLG_RESULT),
|
Chris@0
|
31 [SND_SEQ_EVENT_NOTE]
|
Chris@0
|
32 = FIXED_EV(SND_SEQ_EVFLG_NOTE) | _SND_SEQ_TYPE_OPT(SND_SEQ_EVFLG_NOTE_TWOARG),
|
Chris@0
|
33 [SND_SEQ_EVENT_NOTEON ... SND_SEQ_EVENT_KEYPRESS]
|
Chris@0
|
34 = FIXED_EV(SND_SEQ_EVFLG_NOTE),
|
Chris@0
|
35 [SND_SEQ_EVENT_CONTROLLER ... SND_SEQ_EVENT_REGPARAM]
|
Chris@0
|
36 = FIXED_EV(SND_SEQ_EVFLG_CONTROL),
|
Chris@0
|
37 [SND_SEQ_EVENT_START ... SND_SEQ_EVENT_STOP]
|
Chris@0
|
38 = FIXED_EV(SND_SEQ_EVFLG_QUEUE),
|
Chris@0
|
39 [SND_SEQ_EVENT_SETPOS_TICK]
|
Chris@0
|
40 = FIXED_EV(SND_SEQ_EVFLG_QUEUE) | _SND_SEQ_TYPE_OPT(SND_SEQ_EVFLG_QUEUE_TICK),
|
Chris@0
|
41 [SND_SEQ_EVENT_SETPOS_TIME]
|
Chris@0
|
42 = FIXED_EV(SND_SEQ_EVFLG_QUEUE) | _SND_SEQ_TYPE_OPT(SND_SEQ_EVFLG_QUEUE_TIME),
|
Chris@0
|
43 [SND_SEQ_EVENT_TEMPO ... SND_SEQ_EVENT_SYNC_POS]
|
Chris@0
|
44 = FIXED_EV(SND_SEQ_EVFLG_QUEUE) | _SND_SEQ_TYPE_OPT(SND_SEQ_EVFLG_QUEUE_VALUE),
|
Chris@0
|
45 [SND_SEQ_EVENT_TUNE_REQUEST ... SND_SEQ_EVENT_SENSING]
|
Chris@0
|
46 = FIXED_EV(SND_SEQ_EVFLG_NONE),
|
Chris@0
|
47 [SND_SEQ_EVENT_ECHO ... SND_SEQ_EVENT_OSS]
|
Chris@0
|
48 = FIXED_EV(SND_SEQ_EVFLG_RAW) | FIXED_EV(SND_SEQ_EVFLG_SYSTEM),
|
Chris@0
|
49 [SND_SEQ_EVENT_CLIENT_START ... SND_SEQ_EVENT_PORT_CHANGE]
|
Chris@0
|
50 = FIXED_EV(SND_SEQ_EVFLG_MESSAGE),
|
Chris@0
|
51 [SND_SEQ_EVENT_PORT_SUBSCRIBED ... SND_SEQ_EVENT_PORT_UNSUBSCRIBED]
|
Chris@0
|
52 = FIXED_EV(SND_SEQ_EVFLG_CONNECTION),
|
Chris@0
|
53 [SND_SEQ_EVENT_SAMPLE ... SND_SEQ_EVENT_SAMPLE_PRIVATE1]
|
Chris@0
|
54 = FIXED_EV(SND_SEQ_EVFLG_SAMPLE),
|
Chris@0
|
55 [SND_SEQ_EVENT_USR0 ... SND_SEQ_EVENT_USR9]
|
Chris@0
|
56 = FIXED_EV(SND_SEQ_EVFLG_RAW) | FIXED_EV(SND_SEQ_EVFLG_USERS),
|
Chris@0
|
57 [SND_SEQ_EVENT_INSTR_BEGIN ... SND_SEQ_EVENT_INSTR_CHANGE]
|
Chris@0
|
58 = _SND_SEQ_TYPE(SND_SEQ_EVFLG_INSTR) | _SND_SEQ_TYPE(SND_SEQ_EVFLG_VARUSR),
|
Chris@0
|
59 [SND_SEQ_EVENT_SYSEX ... SND_SEQ_EVENT_BOUNCE]
|
Chris@0
|
60 = _SND_SEQ_TYPE(SND_SEQ_EVFLG_VARIABLE),
|
Chris@0
|
61 [SND_SEQ_EVENT_USR_VAR0 ... SND_SEQ_EVENT_USR_VAR4]
|
Chris@0
|
62 = _SND_SEQ_TYPE(SND_SEQ_EVFLG_VARIABLE) | _SND_SEQ_TYPE(SND_SEQ_EVFLG_USERS),
|
Chris@0
|
63 [SND_SEQ_EVENT_NONE]
|
Chris@0
|
64 = FIXED_EV(SND_SEQ_EVFLG_NONE),
|
Chris@0
|
65 };
|
Chris@0
|
66
|
Chris@0
|
67 /**
|
Chris@0
|
68 * \file seq/seq_midi_event.c
|
Chris@0
|
69 * \brief MIDI byte <-> sequencer event coder
|
Chris@0
|
70 * \author Takashi Iwai <tiwai@suse.de>
|
Chris@0
|
71 * \author Jaroslav Kysela <perex@suse.cz>
|
Chris@0
|
72 * \date 2000-2001
|
Chris@0
|
73 */
|
Chris@0
|
74
|
Chris@0
|
75 /*
|
Chris@0
|
76 * MIDI byte <-> sequencer event coder
|
Chris@0
|
77 *
|
Chris@0
|
78 * Copyright (C) 1998,99,2000 Takashi Iwai <tiwai@suse.de>,
|
Chris@0
|
79 * Jaroslav Kysela <perex@suse.cz>
|
Chris@0
|
80 *
|
Chris@0
|
81 *
|
Chris@0
|
82 * This library is free software; you can redistribute it and/or modify
|
Chris@0
|
83 * it under the terms of the GNU Lesser General Public License as
|
Chris@0
|
84 * published by the Free Software Foundation; either version 2.1 of
|
Chris@0
|
85 * the License, or (at your option) any later version.
|
Chris@0
|
86 *
|
Chris@0
|
87 * This program is distributed in the hope that it will be useful,
|
Chris@0
|
88 * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
Chris@0
|
89 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
Chris@0
|
90 * GNU Lesser General Public License for more details.
|
Chris@0
|
91 *
|
Chris@0
|
92 * You should have received a copy of the GNU Lesser General Public
|
Chris@0
|
93 * License along with this library; if not, write to the Free Software
|
Chris@0
|
94 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
Chris@0
|
95 */
|
Chris@0
|
96
|
Chris@0
|
97 /* midi status */
|
Chris@0
|
98 struct snd_midi_event {
|
Chris@0
|
99 size_t qlen; /* queue length */
|
Chris@0
|
100 size_t read; /* chars read */
|
Chris@0
|
101 int type; /* current event type */
|
Chris@0
|
102 unsigned char lastcmd;
|
Chris@0
|
103 unsigned char nostat;
|
Chris@0
|
104 size_t bufsize;
|
Chris@0
|
105 unsigned char *buf; /* input buffer */
|
Chris@0
|
106 };
|
Chris@0
|
107
|
Chris@0
|
108
|
Chris@0
|
109 /* queue type */
|
Chris@0
|
110 /* from 0 to 7 are normal commands (note off, on, etc.) */
|
Chris@0
|
111 #define ST_NOTEOFF 0
|
Chris@0
|
112 #define ST_NOTEON 1
|
Chris@0
|
113 #define ST_SPECIAL 8
|
Chris@0
|
114 #define ST_SYSEX ST_SPECIAL
|
Chris@0
|
115 /* from 8 to 15 are events for 0xf0-0xf7 */
|
Chris@0
|
116
|
Chris@0
|
117
|
Chris@0
|
118 /* status event types */
|
Chris@0
|
119 typedef void (*event_encode_t)(snd_midi_event_t *dev, snd_seq_event_t *ev);
|
Chris@0
|
120 typedef void (*event_decode_t)(const snd_seq_event_t *ev, unsigned char *buf);
|
Chris@0
|
121
|
Chris@0
|
122 /*
|
Chris@0
|
123 * prototypes
|
Chris@0
|
124 */
|
Chris@0
|
125 static void note_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
|
Chris@0
|
126 static void one_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
|
Chris@0
|
127 static void pitchbend_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
|
Chris@0
|
128 static void two_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
|
Chris@0
|
129 static void one_param_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
|
Chris@0
|
130 static void songpos_event(snd_midi_event_t *dev, snd_seq_event_t *ev);
|
Chris@0
|
131 static void note_decode(const snd_seq_event_t *ev, unsigned char *buf);
|
Chris@0
|
132 static void one_param_decode(const snd_seq_event_t *ev, unsigned char *buf);
|
Chris@0
|
133 static void pitchbend_decode(const snd_seq_event_t *ev, unsigned char *buf);
|
Chris@0
|
134 static void two_param_decode(const snd_seq_event_t *ev, unsigned char *buf);
|
Chris@0
|
135 static void songpos_decode(const snd_seq_event_t *ev, unsigned char *buf);
|
Chris@0
|
136
|
Chris@0
|
137 /*
|
Chris@0
|
138 * event list
|
Chris@0
|
139 */
|
Chris@0
|
140 static struct status_event_list_t {
|
Chris@0
|
141 int event;
|
Chris@0
|
142 int qlen;
|
Chris@0
|
143 event_encode_t encode;
|
Chris@0
|
144 event_decode_t decode;
|
Chris@0
|
145 } status_event[] = {
|
Chris@0
|
146 /* 0x80 - 0xf0 */
|
Chris@0
|
147 {SND_SEQ_EVENT_NOTEOFF, 2, note_event, note_decode},
|
Chris@0
|
148 {SND_SEQ_EVENT_NOTEON, 2, note_event, note_decode},
|
Chris@0
|
149 {SND_SEQ_EVENT_KEYPRESS, 2, note_event, note_decode},
|
Chris@0
|
150 {SND_SEQ_EVENT_CONTROLLER, 2, two_param_ctrl_event, two_param_decode},
|
Chris@0
|
151 {SND_SEQ_EVENT_PGMCHANGE, 1, one_param_ctrl_event, one_param_decode},
|
Chris@0
|
152 {SND_SEQ_EVENT_CHANPRESS, 1, one_param_ctrl_event, one_param_decode},
|
Chris@0
|
153 {SND_SEQ_EVENT_PITCHBEND, 2, pitchbend_ctrl_event, pitchbend_decode},
|
Chris@0
|
154 {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf0 */
|
Chris@0
|
155 /* 0xf0 - 0xff */
|
Chris@0
|
156 {SND_SEQ_EVENT_SYSEX, 1, NULL, NULL}, /* sysex: 0xf0 */
|
Chris@0
|
157 {SND_SEQ_EVENT_QFRAME, 1, one_param_event, one_param_decode}, /* 0xf1 */
|
Chris@0
|
158 {SND_SEQ_EVENT_SONGPOS, 2, songpos_event, songpos_decode}, /* 0xf2 */
|
Chris@0
|
159 {SND_SEQ_EVENT_SONGSEL, 1, one_param_event, one_param_decode}, /* 0xf3 */
|
Chris@0
|
160 {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf4 */
|
Chris@0
|
161 {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf5 */
|
Chris@0
|
162 {SND_SEQ_EVENT_TUNE_REQUEST, 0, NULL, NULL}, /* 0xf6 */
|
Chris@0
|
163 {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf7 */
|
Chris@0
|
164 {SND_SEQ_EVENT_CLOCK, 0, NULL, NULL}, /* 0xf8 */
|
Chris@0
|
165 {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf9 */
|
Chris@0
|
166 {SND_SEQ_EVENT_START, 0, NULL, NULL}, /* 0xfa */
|
Chris@0
|
167 {SND_SEQ_EVENT_CONTINUE, 0, NULL, NULL}, /* 0xfb */
|
Chris@0
|
168 {SND_SEQ_EVENT_STOP, 0, NULL, NULL}, /* 0xfc */
|
Chris@0
|
169 {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xfd */
|
Chris@0
|
170 {SND_SEQ_EVENT_SENSING, 0, NULL, NULL}, /* 0xfe */
|
Chris@0
|
171 {SND_SEQ_EVENT_RESET, 0, NULL, NULL}, /* 0xff */
|
Chris@0
|
172 };
|
Chris@0
|
173
|
Chris@0
|
174 #ifdef UNNEEDED_BY_DSSI
|
Chris@0
|
175 static int extra_decode_ctrl14(snd_midi_event_t *dev, unsigned char *buf, int len, const snd_seq_event_t *ev);
|
Chris@0
|
176 static int extra_decode_xrpn(snd_midi_event_t *dev, unsigned char *buf, int count, const snd_seq_event_t *ev);
|
Chris@0
|
177
|
Chris@0
|
178 static struct extra_event_list_t {
|
Chris@0
|
179 int event;
|
Chris@0
|
180 int (*decode)(snd_midi_event_t *dev, unsigned char *buf, int len, const snd_seq_event_t *ev);
|
Chris@0
|
181 } extra_event[] = {
|
Chris@0
|
182 {SND_SEQ_EVENT_CONTROL14, extra_decode_ctrl14},
|
Chris@0
|
183 {SND_SEQ_EVENT_NONREGPARAM, extra_decode_xrpn},
|
Chris@0
|
184 {SND_SEQ_EVENT_REGPARAM, extra_decode_xrpn},
|
Chris@0
|
185 };
|
Chris@0
|
186
|
Chris@0
|
187 #define numberof(ary) (sizeof(ary)/sizeof(ary[0]))
|
Chris@0
|
188 #endif /* UNNEEDED_BY_DSSI */
|
Chris@0
|
189
|
Chris@0
|
190 /**
|
Chris@0
|
191 * \brief Initialize MIDI event parser
|
Chris@0
|
192 * \param bufsize buffer size for MIDI message
|
Chris@0
|
193 * \param rdev allocated MIDI event parser
|
Chris@0
|
194 * \return 0 on success otherwise a negative error code
|
Chris@0
|
195 *
|
Chris@0
|
196 * Allocates and initializes MIDI event parser.
|
Chris@0
|
197 */
|
Chris@0
|
198 int snd_midi_event_new(size_t bufsize, snd_midi_event_t **rdev)
|
Chris@0
|
199 {
|
Chris@0
|
200 snd_midi_event_t *dev;
|
Chris@0
|
201
|
Chris@0
|
202 *rdev = NULL;
|
Chris@0
|
203 dev = (snd_midi_event_t *)calloc(1, sizeof(snd_midi_event_t));
|
Chris@0
|
204 if (dev == NULL)
|
Chris@0
|
205 return -ENOMEM;
|
Chris@0
|
206 if (bufsize > 0) {
|
Chris@0
|
207 dev->buf = malloc(bufsize);
|
Chris@0
|
208 if (dev->buf == NULL) {
|
Chris@0
|
209 free(dev);
|
Chris@0
|
210 return -ENOMEM;
|
Chris@0
|
211 }
|
Chris@0
|
212 }
|
Chris@0
|
213 dev->bufsize = bufsize;
|
Chris@0
|
214 dev->lastcmd = 0xff;
|
Chris@0
|
215 *rdev = dev;
|
Chris@0
|
216 return 0;
|
Chris@0
|
217 }
|
Chris@0
|
218
|
Chris@0
|
219 /**
|
Chris@0
|
220 * \brief Free MIDI event parser
|
Chris@0
|
221 * \param rdev MIDI event parser
|
Chris@0
|
222 * \return 0 on success otherwise a negative error code
|
Chris@0
|
223 *
|
Chris@0
|
224 * Frees MIDI event parser.
|
Chris@0
|
225 */
|
Chris@0
|
226 void snd_midi_event_free(snd_midi_event_t *dev)
|
Chris@0
|
227 {
|
Chris@0
|
228 if (dev != NULL) {
|
Chris@0
|
229 if (dev->buf)
|
Chris@0
|
230 free(dev->buf);
|
Chris@0
|
231 free(dev);
|
Chris@0
|
232 }
|
Chris@0
|
233 }
|
Chris@0
|
234
|
Chris@0
|
235 #ifdef UNNEEDED_BY_DSSI
|
Chris@0
|
236 /**
|
Chris@0
|
237 * \brief Enable/disable MIDI command merging
|
Chris@0
|
238 * \param dev MIDI event parser
|
Chris@0
|
239 * \param on 0 - enable MIDI command merging, 1 - always pass the command
|
Chris@0
|
240 *
|
Chris@0
|
241 * Enable/disable MIDI command merging
|
Chris@0
|
242 */
|
Chris@0
|
243 void snd_midi_event_no_status(snd_midi_event_t *dev, int on)
|
Chris@0
|
244 {
|
Chris@0
|
245 dev->nostat = on ? 1 : 0;
|
Chris@0
|
246 }
|
Chris@0
|
247 #endif /* UNNEEDED_BY_DSSI */
|
Chris@0
|
248
|
Chris@0
|
249 /*
|
Chris@0
|
250 * initialize record
|
Chris@0
|
251 */
|
Chris@0
|
252 inline static void reset_encode(snd_midi_event_t *dev)
|
Chris@0
|
253 {
|
Chris@0
|
254 dev->read = 0;
|
Chris@0
|
255 dev->qlen = 0;
|
Chris@0
|
256 dev->type = 0;
|
Chris@0
|
257 }
|
Chris@0
|
258
|
Chris@0
|
259 /**
|
Chris@0
|
260 * \brief Reset MIDI encode parser
|
Chris@0
|
261 * \param dev MIDI event parser
|
Chris@0
|
262 * \return 0 on success otherwise a negative error code
|
Chris@0
|
263 *
|
Chris@0
|
264 * Resets MIDI encode parser
|
Chris@0
|
265 */
|
Chris@0
|
266 void snd_midi_event_reset_encode(snd_midi_event_t *dev)
|
Chris@0
|
267 {
|
Chris@0
|
268 reset_encode(dev);
|
Chris@0
|
269 }
|
Chris@0
|
270
|
Chris@0
|
271 #ifdef UNNEEDED_BY_DSSI
|
Chris@0
|
272 /**
|
Chris@0
|
273 * \brief Reset MIDI decode parser
|
Chris@0
|
274 * \param dev MIDI event parser
|
Chris@0
|
275 * \return 0 on success otherwise a negative error code
|
Chris@0
|
276 *
|
Chris@0
|
277 * Resets MIDI decode parser
|
Chris@0
|
278 */
|
Chris@0
|
279 void snd_midi_event_reset_decode(snd_midi_event_t *dev)
|
Chris@0
|
280 {
|
Chris@0
|
281 dev->lastcmd = 0xff;
|
Chris@0
|
282 }
|
Chris@0
|
283
|
Chris@0
|
284 /**
|
Chris@0
|
285 * \brief Initializes MIDI parsers
|
Chris@0
|
286 * \param dev MIDI event parser
|
Chris@0
|
287 * \return 0 on success otherwise a negative error code
|
Chris@0
|
288 *
|
Chris@0
|
289 * Initializes MIDI parsers (both encode and decode)
|
Chris@0
|
290 */
|
Chris@0
|
291 void snd_midi_event_init(snd_midi_event_t *dev)
|
Chris@0
|
292 {
|
Chris@0
|
293 snd_midi_event_reset_encode(dev);
|
Chris@0
|
294 snd_midi_event_reset_decode(dev);
|
Chris@0
|
295 }
|
Chris@0
|
296
|
Chris@0
|
297 /**
|
Chris@0
|
298 * \brief Resize MIDI message (event) buffer
|
Chris@0
|
299 * \param dev MIDI event parser
|
Chris@0
|
300 * \param bufsize new requested buffer size
|
Chris@0
|
301 * \return 0 on success otherwise a negative error code
|
Chris@0
|
302 *
|
Chris@0
|
303 * Resizes MIDI message (event) buffer.
|
Chris@0
|
304 */
|
Chris@0
|
305 int snd_midi_event_resize_buffer(snd_midi_event_t *dev, size_t bufsize)
|
Chris@0
|
306 {
|
Chris@0
|
307 unsigned char *new_buf, *old_buf;
|
Chris@0
|
308
|
Chris@0
|
309 if (bufsize == dev->bufsize)
|
Chris@0
|
310 return 0;
|
Chris@0
|
311 new_buf = malloc(bufsize);
|
Chris@0
|
312 if (new_buf == NULL)
|
Chris@0
|
313 return -ENOMEM;
|
Chris@0
|
314 old_buf = dev->buf;
|
Chris@0
|
315 dev->buf = new_buf;
|
Chris@0
|
316 dev->bufsize = bufsize;
|
Chris@0
|
317 reset_encode(dev);
|
Chris@0
|
318 if (old_buf)
|
Chris@0
|
319 free(old_buf);
|
Chris@0
|
320 return 0;
|
Chris@0
|
321 }
|
Chris@0
|
322 #endif /* UNNEEDED_BY_DSSI */
|
Chris@0
|
323
|
Chris@0
|
324 /**
|
Chris@0
|
325 * \brief Read bytes and encode to sequencer event if finished
|
Chris@0
|
326 * \param dev MIDI event parser
|
Chris@0
|
327 * \param buf MIDI byte stream
|
Chris@0
|
328 * \param count count of bytes of MIDI byte stream to encode
|
Chris@0
|
329 * \param ev Result - sequencer event
|
Chris@0
|
330 * \return count of encoded bytes otherwise a negative error code
|
Chris@0
|
331 *
|
Chris@0
|
332 * Read bytes and encode to sequencer event if finished.
|
Chris@0
|
333 * If complete sequencer event is available, ev->type is not
|
Chris@0
|
334 * equal to #SND_SEQ_EVENT_NONE.
|
Chris@0
|
335 */
|
Chris@0
|
336 long snd_midi_event_encode(snd_midi_event_t *dev, const unsigned char *buf, long count, snd_seq_event_t *ev)
|
Chris@0
|
337 {
|
Chris@0
|
338 long result = 0;
|
Chris@0
|
339 int rc;
|
Chris@0
|
340
|
Chris@0
|
341 ev->type = SND_SEQ_EVENT_NONE;
|
Chris@0
|
342
|
Chris@0
|
343 while (count-- > 0) {
|
Chris@0
|
344 rc = snd_midi_event_encode_byte(dev, *buf++, ev);
|
Chris@0
|
345 result++;
|
Chris@0
|
346 if (rc < 0)
|
Chris@0
|
347 return rc;
|
Chris@0
|
348 else if (rc > 0)
|
Chris@0
|
349 return result;
|
Chris@0
|
350 }
|
Chris@0
|
351
|
Chris@0
|
352 return result;
|
Chris@0
|
353 }
|
Chris@0
|
354
|
Chris@0
|
355 /**
|
Chris@0
|
356 * \brief Read one byte and encode to sequencer event if finished
|
Chris@0
|
357 * \param dev MIDI event parser
|
Chris@0
|
358 * \param c a byte of MIDI stream
|
Chris@0
|
359 * \param ev Result - sequencer event
|
Chris@0
|
360 * \return 1 - sequencer event is completed, 0 - next byte is required for completion, otherwise a negative error code
|
Chris@0
|
361 *
|
Chris@0
|
362 * Read byte and encode to sequencer event if finished.
|
Chris@0
|
363 */
|
Chris@0
|
364 int snd_midi_event_encode_byte(snd_midi_event_t *dev, int c, snd_seq_event_t *ev)
|
Chris@0
|
365 {
|
Chris@0
|
366 int rc = 0;
|
Chris@0
|
367
|
Chris@0
|
368 c &= 0xff;
|
Chris@0
|
369
|
Chris@0
|
370 if (c >= MIDI_CMD_COMMON_CLOCK) {
|
Chris@0
|
371 /* real-time event */
|
Chris@0
|
372 ev->type = status_event[ST_SPECIAL + c - 0xf0].event;
|
Chris@0
|
373 ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK;
|
Chris@0
|
374 ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED;
|
Chris@0
|
375 return 1;
|
Chris@0
|
376 }
|
Chris@0
|
377
|
Chris@0
|
378 if (dev->qlen > 0) {
|
Chris@0
|
379 /* rest of command */
|
Chris@0
|
380 dev->buf[dev->read++] = c;
|
Chris@0
|
381 if (dev->type != ST_SYSEX)
|
Chris@0
|
382 dev->qlen--;
|
Chris@0
|
383 } else {
|
Chris@0
|
384 /* new command */
|
Chris@0
|
385 dev->read = 1;
|
Chris@0
|
386 if (c & 0x80) {
|
Chris@0
|
387 dev->buf[0] = c;
|
Chris@0
|
388 if ((c & 0xf0) == 0xf0) /* special events */
|
Chris@0
|
389 dev->type = (c & 0x0f) + ST_SPECIAL;
|
Chris@0
|
390 else
|
Chris@0
|
391 dev->type = (c >> 4) & 0x07;
|
Chris@0
|
392 dev->qlen = status_event[dev->type].qlen;
|
Chris@0
|
393 } else {
|
Chris@0
|
394 /* process this byte as argument */
|
Chris@0
|
395 dev->buf[dev->read++] = c;
|
Chris@0
|
396 dev->qlen = status_event[dev->type].qlen - 1;
|
Chris@0
|
397 }
|
Chris@0
|
398 }
|
Chris@0
|
399 if (dev->qlen == 0) {
|
Chris@0
|
400 ev->type = status_event[dev->type].event;
|
Chris@0
|
401 ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK;
|
Chris@0
|
402 ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED;
|
Chris@0
|
403 if (status_event[dev->type].encode) /* set data values */
|
Chris@0
|
404 status_event[dev->type].encode(dev, ev);
|
Chris@0
|
405 rc = 1;
|
Chris@0
|
406 } else if (dev->type == ST_SYSEX) {
|
Chris@0
|
407 if (c == MIDI_CMD_COMMON_SYSEX_END ||
|
Chris@0
|
408 dev->read >= dev->bufsize) {
|
Chris@0
|
409 ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK;
|
Chris@0
|
410 ev->flags |= SNDRV_SEQ_EVENT_LENGTH_VARIABLE;
|
Chris@0
|
411 ev->type = SNDRV_SEQ_EVENT_SYSEX;
|
Chris@0
|
412 ev->data.ext.len = dev->read;
|
Chris@0
|
413 ev->data.ext.ptr = dev->buf;
|
Chris@0
|
414 if (c != MIDI_CMD_COMMON_SYSEX_END)
|
Chris@0
|
415 dev->read = 0; /* continue to parse */
|
Chris@0
|
416 else
|
Chris@0
|
417 reset_encode(dev); /* all parsed */
|
Chris@0
|
418 rc = 1;
|
Chris@0
|
419 }
|
Chris@0
|
420 }
|
Chris@0
|
421
|
Chris@0
|
422 return rc;
|
Chris@0
|
423 }
|
Chris@0
|
424
|
Chris@0
|
425 /* encode note event */
|
Chris@0
|
426 static void note_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
|
Chris@0
|
427 {
|
Chris@0
|
428 ev->data.note.channel = dev->buf[0] & 0x0f;
|
Chris@0
|
429 ev->data.note.note = dev->buf[1];
|
Chris@0
|
430 ev->data.note.velocity = dev->buf[2];
|
Chris@0
|
431 }
|
Chris@0
|
432
|
Chris@0
|
433 /* encode one parameter controls */
|
Chris@0
|
434 static void one_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
|
Chris@0
|
435 {
|
Chris@0
|
436 ev->data.control.channel = dev->buf[0] & 0x0f;
|
Chris@0
|
437 ev->data.control.value = dev->buf[1];
|
Chris@0
|
438 }
|
Chris@0
|
439
|
Chris@0
|
440 /* encode pitch wheel change */
|
Chris@0
|
441 static void pitchbend_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
|
Chris@0
|
442 {
|
Chris@0
|
443 ev->data.control.channel = dev->buf[0] & 0x0f;
|
Chris@0
|
444 ev->data.control.value = (int)dev->buf[2] * 128 + (int)dev->buf[1] - 8192;
|
Chris@0
|
445 }
|
Chris@0
|
446
|
Chris@0
|
447 /* encode midi control change */
|
Chris@0
|
448 static void two_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
|
Chris@0
|
449 {
|
Chris@0
|
450 ev->data.control.channel = dev->buf[0] & 0x0f;
|
Chris@0
|
451 ev->data.control.param = dev->buf[1];
|
Chris@0
|
452 ev->data.control.value = dev->buf[2];
|
Chris@0
|
453 }
|
Chris@0
|
454
|
Chris@0
|
455 /* encode one parameter value*/
|
Chris@0
|
456 static void one_param_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
|
Chris@0
|
457 {
|
Chris@0
|
458 ev->data.control.value = dev->buf[1];
|
Chris@0
|
459 }
|
Chris@0
|
460
|
Chris@0
|
461 /* encode song position */
|
Chris@0
|
462 static void songpos_event(snd_midi_event_t *dev, snd_seq_event_t *ev)
|
Chris@0
|
463 {
|
Chris@0
|
464 ev->data.control.value = (int)dev->buf[2] * 128 + (int)dev->buf[1];
|
Chris@0
|
465 }
|
Chris@0
|
466
|
Chris@0
|
467 #ifdef UNNEEDED_BY_DSSI
|
Chris@0
|
468 /**
|
Chris@0
|
469 * \brief Decode sequencer event to MIDI byte stream
|
Chris@0
|
470 * \param dev MIDI event parser
|
Chris@0
|
471 * \param buf Result - MIDI byte stream
|
Chris@0
|
472 * \param count Available bytes in MIDI byte stream
|
Chris@0
|
473 * \param ev Event to decode
|
Chris@0
|
474 * \return count of decoded bytes otherwise a negative error code
|
Chris@0
|
475 *
|
Chris@0
|
476 * Decode sequencer event to MIDI byte stream.
|
Chris@0
|
477 */
|
Chris@0
|
478 long snd_midi_event_decode(snd_midi_event_t *dev, unsigned char *buf, long count, const snd_seq_event_t *ev)
|
Chris@0
|
479 {
|
Chris@0
|
480 int cmd;
|
Chris@0
|
481 long qlen;
|
Chris@0
|
482 unsigned int type;
|
Chris@0
|
483
|
Chris@0
|
484 if (ev->type == SNDRV_SEQ_EVENT_NONE)
|
Chris@0
|
485 return -ENOENT;
|
Chris@0
|
486
|
Chris@0
|
487 for (type = 0; type < numberof(status_event); type++) {
|
Chris@0
|
488 if (ev->type == status_event[type].event)
|
Chris@0
|
489 goto __found;
|
Chris@0
|
490 }
|
Chris@0
|
491 for (type = 0; type < numberof(extra_event); type++) {
|
Chris@0
|
492 if (ev->type == extra_event[type].event)
|
Chris@0
|
493 return extra_event[type].decode(dev, buf, count, ev);
|
Chris@0
|
494 }
|
Chris@0
|
495 return -ENOENT;
|
Chris@0
|
496
|
Chris@0
|
497 __found:
|
Chris@0
|
498 if (type >= ST_SPECIAL)
|
Chris@0
|
499 cmd = 0xf0 + (type - ST_SPECIAL);
|
Chris@0
|
500 else
|
Chris@0
|
501 /* data.note.channel and data.control.channel is identical */
|
Chris@0
|
502 cmd = 0x80 | (type << 4) | (ev->data.note.channel & 0x0f);
|
Chris@0
|
503
|
Chris@0
|
504
|
Chris@0
|
505 if (cmd == MIDI_CMD_COMMON_SYSEX) {
|
Chris@0
|
506 qlen = ev->data.ext.len;
|
Chris@0
|
507 if (count < qlen)
|
Chris@0
|
508 return -ENOMEM;
|
Chris@0
|
509 switch (ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) {
|
Chris@0
|
510 case SNDRV_SEQ_EVENT_LENGTH_FIXED:
|
Chris@0
|
511 return -EINVAL; /* invalid event */
|
Chris@0
|
512 }
|
Chris@0
|
513 memcpy(buf, ev->data.ext.ptr, qlen);
|
Chris@0
|
514 return qlen;
|
Chris@0
|
515 } else {
|
Chris@0
|
516 unsigned char xbuf[4];
|
Chris@0
|
517
|
Chris@0
|
518 if ((cmd & 0xf0) == 0xf0 || dev->lastcmd != cmd || dev->nostat) {
|
Chris@0
|
519 dev->lastcmd = cmd;
|
Chris@0
|
520 xbuf[0] = cmd;
|
Chris@0
|
521 if (status_event[type].decode)
|
Chris@0
|
522 status_event[type].decode(ev, xbuf + 1);
|
Chris@0
|
523 qlen = status_event[type].qlen + 1;
|
Chris@0
|
524 } else {
|
Chris@0
|
525 if (status_event[type].decode)
|
Chris@0
|
526 status_event[type].decode(ev, xbuf + 0);
|
Chris@0
|
527 qlen = status_event[type].qlen;
|
Chris@0
|
528 }
|
Chris@0
|
529 if (count < qlen)
|
Chris@0
|
530 return -ENOMEM;
|
Chris@0
|
531 memcpy(buf, xbuf, qlen);
|
Chris@0
|
532 return qlen;
|
Chris@0
|
533 }
|
Chris@0
|
534 }
|
Chris@0
|
535 #endif /* UNNEEDED_BY_DSSI */
|
Chris@0
|
536
|
Chris@0
|
537 /* decode note event */
|
Chris@0
|
538 static void note_decode(const snd_seq_event_t *ev, unsigned char *buf)
|
Chris@0
|
539 {
|
Chris@0
|
540 buf[0] = ev->data.note.note & 0x7f;
|
Chris@0
|
541 buf[1] = ev->data.note.velocity & 0x7f;
|
Chris@0
|
542 }
|
Chris@0
|
543
|
Chris@0
|
544 /* decode one parameter controls */
|
Chris@0
|
545 static void one_param_decode(const snd_seq_event_t *ev, unsigned char *buf)
|
Chris@0
|
546 {
|
Chris@0
|
547 buf[0] = ev->data.control.value & 0x7f;
|
Chris@0
|
548 }
|
Chris@0
|
549
|
Chris@0
|
550 /* decode pitch wheel change */
|
Chris@0
|
551 static void pitchbend_decode(const snd_seq_event_t *ev, unsigned char *buf)
|
Chris@0
|
552 {
|
Chris@0
|
553 int value = ev->data.control.value + 8192;
|
Chris@0
|
554 buf[0] = value & 0x7f;
|
Chris@0
|
555 buf[1] = (value >> 7) & 0x7f;
|
Chris@0
|
556 }
|
Chris@0
|
557
|
Chris@0
|
558 /* decode midi control change */
|
Chris@0
|
559 static void two_param_decode(const snd_seq_event_t *ev, unsigned char *buf)
|
Chris@0
|
560 {
|
Chris@0
|
561 buf[0] = ev->data.control.param & 0x7f;
|
Chris@0
|
562 buf[1] = ev->data.control.value & 0x7f;
|
Chris@0
|
563 }
|
Chris@0
|
564
|
Chris@0
|
565 /* decode song position */
|
Chris@0
|
566 static void songpos_decode(const snd_seq_event_t *ev, unsigned char *buf)
|
Chris@0
|
567 {
|
Chris@0
|
568 buf[0] = ev->data.control.value & 0x7f;
|
Chris@0
|
569 buf[1] = (ev->data.control.value >> 7) & 0x7f;
|
Chris@0
|
570 }
|
Chris@0
|
571
|
Chris@0
|
572 #ifdef UNNEEDED_BY_DSSI
|
Chris@0
|
573 /* decode 14bit control */
|
Chris@0
|
574 static int extra_decode_ctrl14(snd_midi_event_t *dev, unsigned char *buf, int count, const snd_seq_event_t *ev)
|
Chris@0
|
575 {
|
Chris@0
|
576 unsigned char cmd;
|
Chris@0
|
577 int idx = 0;
|
Chris@0
|
578
|
Chris@0
|
579 cmd = MIDI_CMD_CONTROL|(ev->data.control.channel & 0x0f);
|
Chris@0
|
580 if (ev->data.control.param < 32) {
|
Chris@0
|
581 if (count < 4)
|
Chris@0
|
582 return -ENOMEM;
|
Chris@0
|
583 if (dev->nostat && count < 6)
|
Chris@0
|
584 return -ENOMEM;
|
Chris@0
|
585 if (cmd != dev->lastcmd || dev->nostat) {
|
Chris@0
|
586 if (count < 5)
|
Chris@0
|
587 return -ENOMEM;
|
Chris@0
|
588 buf[idx++] = dev->lastcmd = cmd;
|
Chris@0
|
589 }
|
Chris@0
|
590 buf[idx++] = ev->data.control.param;
|
Chris@0
|
591 buf[idx++] = (ev->data.control.value >> 7) & 0x7f;
|
Chris@0
|
592 if (dev->nostat)
|
Chris@0
|
593 buf[idx++] = cmd;
|
Chris@0
|
594 buf[idx++] = ev->data.control.param + 32;
|
Chris@0
|
595 buf[idx++] = ev->data.control.value & 0x7f;
|
Chris@0
|
596 } else {
|
Chris@0
|
597 if (count < 2)
|
Chris@0
|
598 return -ENOMEM;
|
Chris@0
|
599 if (cmd != dev->lastcmd || dev->nostat) {
|
Chris@0
|
600 if (count < 3)
|
Chris@0
|
601 return -ENOMEM;
|
Chris@0
|
602 buf[idx++] = dev->lastcmd = cmd;
|
Chris@0
|
603 }
|
Chris@0
|
604 buf[idx++] = ev->data.control.param & 0x7f;
|
Chris@0
|
605 buf[idx++] = ev->data.control.value & 0x7f;
|
Chris@0
|
606 }
|
Chris@0
|
607 return idx;
|
Chris@0
|
608 }
|
Chris@0
|
609
|
Chris@0
|
610 /* decode reg/nonreg param */
|
Chris@0
|
611 static int extra_decode_xrpn(snd_midi_event_t *dev, unsigned char *buf, int count, const snd_seq_event_t *ev)
|
Chris@0
|
612 {
|
Chris@0
|
613 unsigned char cmd;
|
Chris@0
|
614 char *cbytes;
|
Chris@0
|
615 static char cbytes_nrpn[4] = { MIDI_CTL_NONREG_PARM_NUM_MSB,
|
Chris@0
|
616 MIDI_CTL_NONREG_PARM_NUM_LSB,
|
Chris@0
|
617 MIDI_CTL_MSB_DATA_ENTRY,
|
Chris@0
|
618 MIDI_CTL_LSB_DATA_ENTRY };
|
Chris@0
|
619 static char cbytes_rpn[4] = { MIDI_CTL_REGIST_PARM_NUM_MSB,
|
Chris@0
|
620 MIDI_CTL_REGIST_PARM_NUM_LSB,
|
Chris@0
|
621 MIDI_CTL_MSB_DATA_ENTRY,
|
Chris@0
|
622 MIDI_CTL_LSB_DATA_ENTRY };
|
Chris@0
|
623 unsigned char bytes[4];
|
Chris@0
|
624 int idx = 0, i;
|
Chris@0
|
625
|
Chris@0
|
626 if (count < 8)
|
Chris@0
|
627 return -ENOMEM;
|
Chris@0
|
628 if (dev->nostat && count < 12)
|
Chris@0
|
629 return -ENOMEM;
|
Chris@0
|
630 cmd = MIDI_CMD_CONTROL|(ev->data.control.channel & 0x0f);
|
Chris@0
|
631 bytes[0] = ev->data.control.param & 0x007f;
|
Chris@0
|
632 bytes[1] = (ev->data.control.param & 0x3f80) >> 7;
|
Chris@0
|
633 bytes[2] = ev->data.control.value & 0x007f;
|
Chris@0
|
634 bytes[3] = (ev->data.control.value & 0x3f80) >> 7;
|
Chris@0
|
635 if (cmd != dev->lastcmd && !dev->nostat) {
|
Chris@0
|
636 if (count < 9)
|
Chris@0
|
637 return -ENOMEM;
|
Chris@0
|
638 buf[idx++] = dev->lastcmd = cmd;
|
Chris@0
|
639 }
|
Chris@0
|
640 cbytes = ev->type == SND_SEQ_EVENT_NONREGPARAM ? cbytes_nrpn : cbytes_rpn;
|
Chris@0
|
641 for (i = 0; i < 4; i++) {
|
Chris@0
|
642 if (dev->nostat)
|
Chris@0
|
643 buf[idx++] = dev->lastcmd = cmd;
|
Chris@0
|
644 buf[idx++] = cbytes[i];
|
Chris@0
|
645 buf[idx++] = bytes[i];
|
Chris@0
|
646 }
|
Chris@0
|
647 return idx;
|
Chris@0
|
648 }
|
Chris@0
|
649 #endif /* UNNEEDED_BY_DSSI */
|