1 | //buffer.c: |
---|
2 | |
---|
3 | /* |
---|
4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
---|
5 | * |
---|
6 | * This file is part of libroar a part of RoarAudio, |
---|
7 | * a cross-platform sound system for both, home and professional use. |
---|
8 | * See README for details. |
---|
9 | * |
---|
10 | * This file is free software; you can redistribute it and/or modify |
---|
11 | * it under the terms of the GNU General Public License version 3 |
---|
12 | * as published by the Free Software Foundation. |
---|
13 | * |
---|
14 | * libroar is distributed in the hope that it will be useful, |
---|
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
17 | * GNU General Public License for more details. |
---|
18 | * |
---|
19 | * You should have received a copy of the GNU General Public License |
---|
20 | * along with this software; see the file COPYING. If not, write to |
---|
21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
---|
22 | * |
---|
23 | * NOTE for everyone want's to change something and send patches: |
---|
24 | * read README and HACKING! There a addition information on |
---|
25 | * the license of this document you need to read before you send |
---|
26 | * any patches. |
---|
27 | * |
---|
28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
---|
29 | * or libpulse*: |
---|
30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
---|
31 | * and are therefore GPL. Because of this it may be illigal to use |
---|
32 | * them with any software that uses libesd, libartsc or libpulse*. |
---|
33 | */ |
---|
34 | |
---|
35 | #include "libroar.h" |
---|
36 | |
---|
37 | int roar_buffer_new (struct roar_buffer ** buf, size_t len) { |
---|
38 | void * data; |
---|
39 | |
---|
40 | if ((data = roar_mm_malloc(len)) == NULL) { |
---|
41 | return -1; |
---|
42 | } |
---|
43 | |
---|
44 | if ( roar_buffer_new_no_ma(buf, len, data) == -1 ) { |
---|
45 | roar_mm_free(data); |
---|
46 | return -1; |
---|
47 | } |
---|
48 | |
---|
49 | if ( roar_buffer_set_flag(*buf, ROAR_BUFFER_FLAG_NOFREE, ROAR_BUFFER_RESET) == -1 ) { |
---|
50 | roar_buffer_free(*buf); |
---|
51 | roar_mm_free(data); |
---|
52 | return -1; |
---|
53 | } |
---|
54 | |
---|
55 | return 0; |
---|
56 | } |
---|
57 | |
---|
58 | int roar_buffer_new_no_ma(struct roar_buffer ** buf, size_t len, void * data) { // no internal malloc |
---|
59 | struct roar_buffer * new; |
---|
60 | |
---|
61 | ROAR_DBG("buffer_new(buf=%p, len=%i) = ?", buf, len); |
---|
62 | |
---|
63 | if ( buf == NULL || data == NULL ) |
---|
64 | return -1; |
---|
65 | |
---|
66 | if ((new = roar_mm_malloc(sizeof(struct roar_buffer))) == NULL) { |
---|
67 | *buf = NULL; |
---|
68 | return -1; |
---|
69 | } |
---|
70 | |
---|
71 | new->data = data; |
---|
72 | |
---|
73 | new->flags = ROAR_BUFFER_FLAG_NONE|ROAR_BUFFER_FLAG_NOFREE; |
---|
74 | |
---|
75 | new->user_data = new->data; |
---|
76 | |
---|
77 | new->next = NULL; |
---|
78 | |
---|
79 | new->len = len; |
---|
80 | new->user_len = len; |
---|
81 | *buf = new; |
---|
82 | |
---|
83 | ROAR_DBG("buffer_new(buf=%p, len=%i): New buffer at %p", buf, len, new); |
---|
84 | |
---|
85 | return 0; |
---|
86 | } |
---|
87 | |
---|
88 | int roar_buffer_free (struct roar_buffer * buf) { |
---|
89 | struct roar_buffer * next; |
---|
90 | |
---|
91 | if ( buf == NULL ) |
---|
92 | return -1; |
---|
93 | |
---|
94 | while ((next = buf->next)) { |
---|
95 | if ( roar_buffer_get_flag(buf, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
---|
96 | roar_mm_free(buf->data); |
---|
97 | |
---|
98 | roar_mm_free(buf); |
---|
99 | buf = next; |
---|
100 | } |
---|
101 | |
---|
102 | if ( roar_buffer_get_flag(buf, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
---|
103 | roar_mm_free(buf->data); |
---|
104 | |
---|
105 | roar_mm_free(buf); |
---|
106 | |
---|
107 | return 0; |
---|
108 | } |
---|
109 | |
---|
110 | int roar_buffer_delete (struct roar_buffer * buf, struct roar_buffer ** next) { |
---|
111 | if ( buf == NULL ) { |
---|
112 | if ( next != NULL ) |
---|
113 | *next = NULL; |
---|
114 | return -1; |
---|
115 | } |
---|
116 | |
---|
117 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = ?", buf, next); |
---|
118 | |
---|
119 | if ( next != NULL ) |
---|
120 | *next = buf->next; |
---|
121 | |
---|
122 | if ( roar_buffer_get_flag(buf, ROAR_BUFFER_FLAG_NOFREE) != 1 ) |
---|
123 | roar_mm_free(buf->data); |
---|
124 | |
---|
125 | roar_mm_free(buf); |
---|
126 | |
---|
127 | ROAR_DBG("buffer_delete(buf=%p, next=%p) = 0", buf, next); |
---|
128 | return 0; |
---|
129 | } |
---|
130 | |
---|
131 | int roar_buffer_add (struct roar_buffer * buf, struct roar_buffer * next) { |
---|
132 | unsigned int deep = 0; |
---|
133 | |
---|
134 | if ( buf == NULL ) |
---|
135 | return -1; |
---|
136 | |
---|
137 | ROAR_DBG("buffer_add(buf=%p, next=%p) = ?", buf, next); |
---|
138 | |
---|
139 | if ( buf->flags & ROAR_BUFFER_FLAG_RING ) |
---|
140 | return -1; |
---|
141 | |
---|
142 | if ( buf == next ) { |
---|
143 | ROAR_ERR("buffer_add(*): both pointer are of the same destination, This is a error in the application"); |
---|
144 | return -1; |
---|
145 | } |
---|
146 | |
---|
147 | while ( buf->next != NULL ) { |
---|
148 | ROAR_DBG("buffer_add(*): buf=%p, next=%p (len=%i)", buf, buf->next, buf->user_len); |
---|
149 | // ROAR_DBG("buffer_add(): buf=%p, buf->next=%p", buf, buf->next); |
---|
150 | buf = buf->next; |
---|
151 | deep++; |
---|
152 | |
---|
153 | if ( buf == next ) { |
---|
154 | ROAR_ERR("buffer_add(*): Can not add buffer: loop detected at deep %u. This is a error in the application", deep); |
---|
155 | } |
---|
156 | } |
---|
157 | |
---|
158 | buf->next = next; |
---|
159 | |
---|
160 | ROAR_DBG("buffer_add(*): adding buffer at deep %u", deep); |
---|
161 | |
---|
162 | return 0; |
---|
163 | } |
---|
164 | |
---|
165 | int roar_buffer_get_next (struct roar_buffer * buf, struct roar_buffer ** next) { |
---|
166 | if ( buf == NULL ) |
---|
167 | return -1; |
---|
168 | |
---|
169 | *next = buf->next; |
---|
170 | |
---|
171 | return 0; |
---|
172 | } |
---|
173 | |
---|
174 | int roar_buffer_ring_new (struct roar_buffer ** buf, size_t len, int free_running) { |
---|
175 | struct roar_buffer * n; |
---|
176 | |
---|
177 | if ( buf == NULL || len == 0 ) |
---|
178 | return -1; |
---|
179 | |
---|
180 | // just to be sure: |
---|
181 | *buf = NULL; |
---|
182 | |
---|
183 | // currently we are limited to free running mode |
---|
184 | if ( !free_running ) |
---|
185 | return -1; |
---|
186 | |
---|
187 | if ( roar_buffer_new(&n, len) == -1 ) |
---|
188 | return -1; |
---|
189 | |
---|
190 | n->flags |= ROAR_BUFFER_FLAG_RING; |
---|
191 | |
---|
192 | if ( free_running ) |
---|
193 | n->flags |= ROAR_BUFFER_FLAG_FREE_RUNNING; |
---|
194 | |
---|
195 | n->meta.ring.read_pos = 0; |
---|
196 | n->meta.ring.write_pos = 0; |
---|
197 | |
---|
198 | memset(n->data, 0, n->len); |
---|
199 | |
---|
200 | *buf = n; |
---|
201 | |
---|
202 | return 0; |
---|
203 | } |
---|
204 | |
---|
205 | int roar_buffer_get_data (struct roar_buffer * buf, void ** data) { |
---|
206 | if ( buf == NULL ) |
---|
207 | return -1; |
---|
208 | |
---|
209 | *data = buf->user_data; |
---|
210 | |
---|
211 | return 0; |
---|
212 | } |
---|
213 | |
---|
214 | int roar_buffer_set_offset (struct roar_buffer * buf, size_t off) { |
---|
215 | if ( buf == NULL ) |
---|
216 | return -1; |
---|
217 | |
---|
218 | buf->user_len -= off; |
---|
219 | buf->user_data += off; |
---|
220 | |
---|
221 | return 0; |
---|
222 | } |
---|
223 | |
---|
224 | int roar_buffer_shift_out (struct roar_buffer ** buf, void * data, size_t * len) { |
---|
225 | size_t todo, cl; |
---|
226 | struct roar_buffer * cur; |
---|
227 | void * cd; |
---|
228 | |
---|
229 | if ( len == NULL || buf == NULL || data == NULL ) { |
---|
230 | ROAR_DBG("roar_buffer_shift_out(buf=%p, data=%p, len={%lu}) = -1 // Invalid input", buf, data, (unsigned long)*len); |
---|
231 | return -1; |
---|
232 | } |
---|
233 | |
---|
234 | if ( *buf == NULL ) { |
---|
235 | ROAR_DBG("roar_buffer_shift_out(buf=%p, data=%p, len={%lu}) = -1 // Invalid pointer to buffer ring", buf, data, (unsigned long)len); |
---|
236 | return -1; |
---|
237 | } |
---|
238 | |
---|
239 | todo = *len; |
---|
240 | cur = *buf; |
---|
241 | |
---|
242 | *len = 0; |
---|
243 | |
---|
244 | while (todo && cur != NULL) { |
---|
245 | ROAR_DBG("roar_buffer_shift_out(*): todo=%u, cur=%p", (unsigned int) todo, cur); |
---|
246 | |
---|
247 | if ( roar_buffer_get_len(cur, &cl) == -1 ) |
---|
248 | return -1; |
---|
249 | |
---|
250 | if ( cl > todo ) { |
---|
251 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
---|
252 | return -1; |
---|
253 | |
---|
254 | cl = todo; |
---|
255 | |
---|
256 | memcpy(data, cd, cl); |
---|
257 | todo -= cl; |
---|
258 | data += cl; |
---|
259 | *len += cl; |
---|
260 | |
---|
261 | if ( roar_buffer_set_offset(cur, cl) == -1 ) |
---|
262 | return -1; |
---|
263 | } else { |
---|
264 | if ( roar_buffer_get_data(cur, &cd) == -1 ) |
---|
265 | return -1; |
---|
266 | |
---|
267 | memcpy(data, cd, cl); |
---|
268 | todo -= cl; |
---|
269 | data += cl; |
---|
270 | *len += cl; |
---|
271 | |
---|
272 | if ( roar_buffer_next(&cur) == -1 ) |
---|
273 | return -1; |
---|
274 | } |
---|
275 | |
---|
276 | /* |
---|
277 | if ( cur == NULL ) |
---|
278 | break; |
---|
279 | */ |
---|
280 | } |
---|
281 | |
---|
282 | *buf = cur; |
---|
283 | |
---|
284 | return 0; |
---|
285 | } |
---|
286 | |
---|
287 | int roar_buffer_set_meta (struct roar_buffer * buf, void * meta) { |
---|
288 | if ( buf == NULL ) |
---|
289 | return -1; |
---|
290 | |
---|
291 | buf->meta.vp = meta; |
---|
292 | |
---|
293 | return 0; |
---|
294 | } |
---|
295 | |
---|
296 | int roar_buffer_get_meta (struct roar_buffer * buf, void ** meta) { |
---|
297 | if ( buf == NULL || meta == NULL ) |
---|
298 | return -1; |
---|
299 | |
---|
300 | *meta = buf->meta.vp; |
---|
301 | |
---|
302 | return 0; |
---|
303 | } |
---|
304 | |
---|
305 | int roar_buffer_set_meta_i32(struct roar_buffer * buf, int32_t meta) { |
---|
306 | if ( buf == NULL ) |
---|
307 | return -1; |
---|
308 | |
---|
309 | buf->meta.i32 = meta; |
---|
310 | |
---|
311 | return 0; |
---|
312 | } |
---|
313 | |
---|
314 | int roar_buffer_get_meta_i32(struct roar_buffer * buf, int32_t * meta) { |
---|
315 | if ( buf == NULL || meta == NULL ) |
---|
316 | return -1; |
---|
317 | |
---|
318 | *meta = buf->meta.i32; |
---|
319 | |
---|
320 | return 0; |
---|
321 | } |
---|
322 | |
---|
323 | int roar_buffer_set_len (struct roar_buffer * buf, size_t len) { |
---|
324 | size_t totlen; |
---|
325 | void * newbuf; |
---|
326 | |
---|
327 | if ( buf == NULL ) |
---|
328 | return -1; |
---|
329 | |
---|
330 | // handle specal case where user length is zero: |
---|
331 | if ( len && !buf->user_len ) { |
---|
332 | buf->user_data = buf->data; |
---|
333 | buf->user_len = buf->len; |
---|
334 | } |
---|
335 | |
---|
336 | if ( len > buf->user_len ) { |
---|
337 | // we can only enlage a buffer if it's one of our own memory segments |
---|
338 | if ( buf->flags & ROAR_BUFFER_FLAG_NOFREE ) |
---|
339 | return -1; |
---|
340 | |
---|
341 | totlen = buf->len - buf->user_len + len; |
---|
342 | newbuf = roar_mm_realloc(buf->data, totlen); |
---|
343 | if ( newbuf == NULL ) |
---|
344 | return -1; |
---|
345 | |
---|
346 | buf->data = newbuf; |
---|
347 | buf->user_len = len; |
---|
348 | } else { |
---|
349 | buf->user_len = len; |
---|
350 | } |
---|
351 | |
---|
352 | return 0; |
---|
353 | } |
---|
354 | |
---|
355 | int roar_buffer_get_len (struct roar_buffer * buf, size_t * len) { |
---|
356 | if ( buf == NULL ) |
---|
357 | return -1; |
---|
358 | |
---|
359 | *len = buf->user_len; |
---|
360 | |
---|
361 | return 0; |
---|
362 | } |
---|
363 | |
---|
364 | int roar_buffer_set_flag (struct roar_buffer * buf, int flag, int reset) { |
---|
365 | if ( buf == NULL ) |
---|
366 | return -1; |
---|
367 | |
---|
368 | buf->flags |= flag; |
---|
369 | |
---|
370 | if ( reset ) |
---|
371 | buf->flags -= flag; |
---|
372 | |
---|
373 | return 0; |
---|
374 | } |
---|
375 | |
---|
376 | int roar_buffer_get_flag (struct roar_buffer * buf, int flag) { |
---|
377 | if ( buf == NULL ) |
---|
378 | return -1; |
---|
379 | |
---|
380 | return buf->flags & flag; |
---|
381 | } |
---|
382 | |
---|
383 | int roar_buffer_duplicate (struct roar_buffer * buf, struct roar_buffer ** copy) { |
---|
384 | struct roar_buffer * cur = buf; |
---|
385 | struct roar_buffer * new; |
---|
386 | void * od, * nd; |
---|
387 | |
---|
388 | *copy = NULL; |
---|
389 | |
---|
390 | while (cur) { |
---|
391 | if ( roar_buffer_new(&new, cur->user_len) == -1 ) { |
---|
392 | roar_buffer_free(*copy); |
---|
393 | return -1; |
---|
394 | } |
---|
395 | |
---|
396 | if ( *copy == NULL ) |
---|
397 | *copy = new; |
---|
398 | |
---|
399 | roar_buffer_get_data(cur, &od); |
---|
400 | roar_buffer_get_data(new, &nd); |
---|
401 | memcpy(nd, od, cur->user_len); |
---|
402 | |
---|
403 | roar_buffer_add(*copy, new); |
---|
404 | |
---|
405 | cur = cur->next; |
---|
406 | } |
---|
407 | return 0; |
---|
408 | } |
---|
409 | |
---|
410 | int roar_buffer_ring_stats (struct roar_buffer * buf, struct roar_buffer_stats * stats) { |
---|
411 | if ( buf == NULL ) |
---|
412 | return -1; |
---|
413 | |
---|
414 | stats->parts = 0; |
---|
415 | stats->bytes = 0; |
---|
416 | stats->memory_usage = 0; |
---|
417 | |
---|
418 | while (buf) { |
---|
419 | stats->parts++; |
---|
420 | stats->bytes += buf->user_len; |
---|
421 | stats->memory_usage += buf->len + sizeof(struct roar_buffer); |
---|
422 | buf = buf->next; |
---|
423 | } |
---|
424 | |
---|
425 | return 0; |
---|
426 | } |
---|
427 | |
---|
428 | int roar_buffer_ring_read (struct roar_buffer * buf, void * data, size_t * len) { |
---|
429 | if ( buf == NULL || len == NULL ) |
---|
430 | return -1; |
---|
431 | |
---|
432 | if ( data == NULL && *len != 0 ) |
---|
433 | return -1; |
---|
434 | |
---|
435 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) |
---|
436 | return -1; |
---|
437 | |
---|
438 | if ( *len == 0 ) |
---|
439 | return 0; |
---|
440 | |
---|
441 | // we may handle this later: |
---|
442 | if ( *len > buf->user_len ) |
---|
443 | return -1; |
---|
444 | |
---|
445 | if ( buf->meta.ring.read_pos >= buf->user_len ) |
---|
446 | buf->meta.ring.read_pos -= buf->user_len; |
---|
447 | |
---|
448 | if ( (*len + buf->meta.ring.read_pos) > buf->user_len ) { |
---|
449 | // wraped mode: |
---|
450 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, buf->user_len - buf->meta.ring.read_pos); |
---|
451 | memcpy(data, buf->user_data, *len + buf->meta.ring.read_pos - buf->user_len); |
---|
452 | |
---|
453 | buf->meta.ring.read_pos += *len; |
---|
454 | buf->meta.ring.read_pos -= buf->user_len; |
---|
455 | return 0; |
---|
456 | } else { |
---|
457 | // unwarped mode: |
---|
458 | memcpy(data, buf->user_data+buf->meta.ring.read_pos, *len); |
---|
459 | buf->meta.ring.read_pos += *len; |
---|
460 | return 0; |
---|
461 | } |
---|
462 | |
---|
463 | return -1; |
---|
464 | } |
---|
465 | |
---|
466 | int roar_buffer_ring_write (struct roar_buffer * buf, void * data, size_t * len) { |
---|
467 | if ( buf == NULL || len == NULL ) |
---|
468 | return -1; |
---|
469 | |
---|
470 | if ( data == NULL && *len != 0 ) |
---|
471 | return -1; |
---|
472 | |
---|
473 | if ( !(buf->flags & ROAR_BUFFER_FLAG_RING) ) |
---|
474 | return -1; |
---|
475 | |
---|
476 | if ( *len == 0 ) |
---|
477 | return 0; |
---|
478 | |
---|
479 | // we may handle this later: |
---|
480 | if ( *len > buf->user_len ) |
---|
481 | return -1; |
---|
482 | |
---|
483 | if ( buf->meta.ring.write_pos >= buf->user_len ) |
---|
484 | buf->meta.ring.write_pos -= buf->user_len; |
---|
485 | |
---|
486 | if ( (*len + buf->meta.ring.write_pos) > buf->user_len ) { |
---|
487 | // wraped mode: |
---|
488 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, buf->user_len - buf->meta.ring.write_pos); |
---|
489 | memcpy(buf->user_data, data, *len + buf->meta.ring.write_pos - buf->user_len); |
---|
490 | |
---|
491 | buf->meta.ring.write_pos += *len; |
---|
492 | buf->meta.ring.write_pos -= buf->user_len; |
---|
493 | return 0; |
---|
494 | } else { |
---|
495 | // unwarped mode: |
---|
496 | memcpy(buf->user_data+buf->meta.ring.write_pos, data, *len); |
---|
497 | buf->meta.ring.write_pos += *len; |
---|
498 | return 0; |
---|
499 | } |
---|
500 | |
---|
501 | return -1; |
---|
502 | } |
---|
503 | |
---|
504 | //ll |
---|