PipeWire: spa/pod/builder.h Source File

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builder.h
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1/* Simple Plugin API
2 *
3 * Copyright © 2018 Wim Taymans
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 */
24
25#ifndef SPA_POD_BUILDER_H
26#define SPA_POD_BUILDER_H
27
28#ifdef __cplusplus
29extern "C" {
30#endif
31
41#include <stdarg.h>
42
43#include <spa/utils/hook.h>
44#include <spa/pod/iter.h>
45#include <spa/pod/vararg.h>
46
47struct spa_pod_builder_state {
48 uint32_t offset;
49#define SPA_POD_BUILDER_FLAG_BODY (1<<0)
50#define SPA_POD_BUILDER_FLAG_FIRST (1<<1)
51 uint32_t flags;
52 struct spa_pod_frame *frame;
53};
54
55 struct spa_pod_builder;
56
57 struct spa_pod_builder_callbacks {
58#define SPA_VERSION_POD_BUILDER_CALLBACKS 0
59 uint32_t version;
60
61 int (*overflow) (void *data, uint32_t size);
62};
63
64struct spa_pod_builder {
65 void *data;
66 uint32_t size;
67 uint32_t _padding;
68 struct spa_pod_builder_state state;
69 struct spa_callbacks callbacks;
70};
71
72#define SPA_POD_BUILDER_INIT(buffer,size) (struct spa_pod_builder){ buffer, size, 0, {}, {} }
73
74 static inline void
75 spa_pod_builder_get_state(struct spa_pod_builder *builder, struct spa_pod_builder_state *state)
76{
77 *state = builder->state;
78}
79
80static inline void
81 spa_pod_builder_set_callbacks(struct spa_pod_builder *builder,
82 const struct spa_pod_builder_callbacks *callbacks, void *data)
83{
84 builder->callbacks = SPA_CALLBACKS_INIT(callbacks, data);
85}
86
87static inline void
88 spa_pod_builder_reset(struct spa_pod_builder *builder, struct spa_pod_builder_state *state)
89{
90 struct spa_pod_frame *f;
91 uint32_t size = builder->state.offset - state->offset;
92 builder->state = *state;
93 for (f = builder->state.frame; f ; f = f->parent)
94 f->pod.size -= size;
95}
96
97static inline void spa_pod_builder_init(struct spa_pod_builder *builder, void *data, uint32_t size)
98{
99 *builder = SPA_POD_BUILDER_INIT(data, size);
100}
101
102static inline struct spa_pod *
103 spa_pod_builder_deref(struct spa_pod_builder *builder, uint32_t offset)
104{
105 uint32_t size = builder->size;
106 if (offset + 8 <= size) {
107 struct spa_pod *pod = SPA_PTROFF(builder->data, offset, struct spa_pod);
108 if (offset + SPA_POD_SIZE(pod) <= size)
109 return pod;
110 }
111 return NULL;
112}
113
114static inline struct spa_pod *
115 spa_pod_builder_frame(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
116{
117 if (frame->offset + SPA_POD_SIZE(&frame->pod) <= builder->size)
118 return SPA_PTROFF(builder->data, frame->offset, struct spa_pod);
119 return NULL;
120}
121
122static inline void
123 spa_pod_builder_push(struct spa_pod_builder *builder,
124 struct spa_pod_frame *frame,
125 const struct spa_pod *pod,
126 uint32_t offset)
127{
128 frame->pod = *pod;
129 frame->offset = offset;
130 frame->parent = builder->state.frame;
131 frame->flags = builder->state.flags;
132 builder->state.frame = frame;
133
134 if (frame->pod.type == SPA_TYPE_Array || frame->pod.type == SPA_TYPE_Choice)
135 builder->state.flags = SPA_POD_BUILDER_FLAG_FIRST | SPA_POD_BUILDER_FLAG_BODY;
136}
137
138static inline int spa_pod_builder_raw(struct spa_pod_builder *builder, const void *data, uint32_t size)
139{
140 int res = 0;
141 struct spa_pod_frame *f;
142 uint32_t offset = builder->state.offset;
143
144 if (offset + size > builder->size) {
145 res = -ENOSPC;
146 spa_callbacks_call_res(&builder->callbacks, struct spa_pod_builder_callbacks, res,
147 overflow, 0, offset + size);
148 }
149 if (res == 0 && data)
150 memcpy(SPA_PTROFF(builder->data, offset, void), data, size);
151
152 builder->state.offset += size;
153
154 for (f = builder->state.frame; f ; f = f->parent)
155 f->pod.size += size;
156
157 return res;
158}
159
160static inline int spa_pod_builder_pad(struct spa_pod_builder *builder, uint32_t size)
161{
162 uint64_t zeroes = 0;
163 size = SPA_ROUND_UP_N(size, 8) - size;
164 return size ? spa_pod_builder_raw(builder, &zeroes, size) : 0;
165}
166
167static inline int
168 spa_pod_builder_raw_padded(struct spa_pod_builder *builder, const void *data, uint32_t size)
169{
170 int r, res = spa_pod_builder_raw(builder, data, size);
171 if ((r = spa_pod_builder_pad(builder, size)) < 0)
172 res = r;
173 return res;
174}
175
176static inline void *spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
177{
178 struct spa_pod *pod;
179
180 if (SPA_FLAG_IS_SET(builder->state.flags, SPA_POD_BUILDER_FLAG_FIRST)) {
181 const struct spa_pod p = { 0, SPA_TYPE_None };
182 spa_pod_builder_raw(builder, &p, sizeof(p));
183 }
184 if ((pod = (struct spa_pod*)spa_pod_builder_frame(builder, frame)) != NULL)
185 *pod = frame->pod;
186
187 builder->state.frame = frame->parent;
188 builder->state.flags = frame->flags;
189 spa_pod_builder_pad(builder, builder->state.offset);
190 return pod;
191}
192
193static inline int
194 spa_pod_builder_primitive(struct spa_pod_builder *builder, const struct spa_pod *p)
195{
196 const void *data;
197 uint32_t size;
198 int r, res;
199
200 if (builder->state.flags == SPA_POD_BUILDER_FLAG_BODY) {
201 data = SPA_POD_BODY_CONST(p);
202 size = SPA_POD_BODY_SIZE(p);
203 } else {
204 data = p;
205 size = SPA_POD_SIZE(p);
206 SPA_FLAG_CLEAR(builder->state.flags, SPA_POD_BUILDER_FLAG_FIRST);
207 }
208 res = spa_pod_builder_raw(builder, data, size);
209 if (builder->state.flags != SPA_POD_BUILDER_FLAG_BODY)
210 if ((r = spa_pod_builder_pad(builder, size)) < 0)
211 res = r;
212 return res;
213}
214
215#define SPA_POD_INIT(size,type) (struct spa_pod) { size, type }
216
217#define SPA_POD_INIT_None() SPA_POD_INIT(0, SPA_TYPE_None)
218
219static inline int spa_pod_builder_none(struct spa_pod_builder *builder)
220{
221 const struct spa_pod p = SPA_POD_INIT_None();
222 return spa_pod_builder_primitive(builder, &p);
223}
224
225static inline int spa_pod_builder_child(struct spa_pod_builder *builder, uint32_t size, uint32_t type)
226{
227 const struct spa_pod p = SPA_POD_INIT(size,type);
228 SPA_FLAG_CLEAR(builder->state.flags, SPA_POD_BUILDER_FLAG_FIRST);
229 return spa_pod_builder_raw(builder, &p, sizeof(p));
230}
231
232#define SPA_POD_INIT_Bool(val) (struct spa_pod_bool){ { sizeof(uint32_t), SPA_TYPE_Bool }, val ? 1 : 0, 0 }
233
234static inline int spa_pod_builder_bool(struct spa_pod_builder *builder, bool val)
235{
236 const struct spa_pod_bool p = SPA_POD_INIT_Bool(val);
237 return spa_pod_builder_primitive(builder, &p.pod);
238}
239
240#define SPA_POD_INIT_Id(val) (struct spa_pod_id){ { sizeof(uint32_t), SPA_TYPE_Id }, (uint32_t)val, 0 }
241
242static inline int spa_pod_builder_id(struct spa_pod_builder *builder, uint32_t val)
243{
244 const struct spa_pod_id p = SPA_POD_INIT_Id(val);
245 return spa_pod_builder_primitive(builder, &p.pod);
246}
247
248#define SPA_POD_INIT_Int(val) (struct spa_pod_int){ { sizeof(int32_t), SPA_TYPE_Int }, (int32_t)val, 0 }
249
250static inline int spa_pod_builder_int(struct spa_pod_builder *builder, int32_t val)
251{
252 const struct spa_pod_int p = SPA_POD_INIT_Int(val);
253 return spa_pod_builder_primitive(builder, &p.pod);
254}
255
256#define SPA_POD_INIT_Long(val) (struct spa_pod_long){ { sizeof(int64_t), SPA_TYPE_Long }, (int64_t)val }
257
258static inline int spa_pod_builder_long(struct spa_pod_builder *builder, int64_t val)
259{
260 const struct spa_pod_long p = SPA_POD_INIT_Long(val);
261 return spa_pod_builder_primitive(builder, &p.pod);
262}
263
264#define SPA_POD_INIT_Float(val) (struct spa_pod_float){ { sizeof(float), SPA_TYPE_Float }, val, 0 }
265
266static inline int spa_pod_builder_float(struct spa_pod_builder *builder, float val)
267{
268 const struct spa_pod_float p = SPA_POD_INIT_Float(val);
269 return spa_pod_builder_primitive(builder, &p.pod);
270}
271
272#define SPA_POD_INIT_Double(val) (struct spa_pod_double){ { sizeof(double), SPA_TYPE_Double }, val }
273
274 static inline int spa_pod_builder_double(struct spa_pod_builder *builder, double val)
275{
276 const struct spa_pod_double p = SPA_POD_INIT_Double(val);
277 return spa_pod_builder_primitive(builder, &p.pod);
278}
279
280#define SPA_POD_INIT_String(len) (struct spa_pod_string){ { len, SPA_TYPE_String } }
281
282static inline int
283 spa_pod_builder_write_string(struct spa_pod_builder *builder, const char *str, uint32_t len)
284{
285 int r, res;
286 res = spa_pod_builder_raw(builder, str, len);
287 if ((r = spa_pod_builder_raw(builder, "", 1)) < 0)
288 res = r;
289 if ((r = spa_pod_builder_pad(builder, builder->state.offset)) < 0)
290 res = r;
291 return res;
292}
293
294static inline int
295 spa_pod_builder_string_len(struct spa_pod_builder *builder, const char *str, uint32_t len)
296{
297 const struct spa_pod_string p = SPA_POD_INIT_String(len+1);
298 int r, res = spa_pod_builder_raw(builder, &p, sizeof(p));
299 if ((r = spa_pod_builder_write_string(builder, str, len)) < 0)
300 res = r;
301 return res;
302}
303
304static inline int spa_pod_builder_string(struct spa_pod_builder *builder, const char *str)
305{
306 uint32_t len = str ? strlen(str) : 0;
307 return spa_pod_builder_string_len(builder, str ? str : "", len);
308}
309
310#define SPA_POD_INIT_Bytes(len) (struct spa_pod_bytes){ { len, SPA_TYPE_Bytes } }
311
312static inline int
313 spa_pod_builder_bytes(struct spa_pod_builder *builder, const void *bytes, uint32_t len)
314{
315 const struct spa_pod_bytes p = SPA_POD_INIT_Bytes(len);
316 int r, res = spa_pod_builder_raw(builder, &p, sizeof(p));
317 if ((r = spa_pod_builder_raw_padded(builder, bytes, len)) < 0)
318 res = r;
319 return res;
320}
321static inline void *
322 spa_pod_builder_reserve_bytes(struct spa_pod_builder *builder, uint32_t len)
323{
324 uint32_t offset = builder->state.offset;
325 if (spa_pod_builder_bytes(builder, NULL, len) < 0)
326 return NULL;
327 return SPA_POD_BODY(spa_pod_builder_deref(builder, offset));
328}
329
330#define SPA_POD_INIT_Pointer(type,value) (struct spa_pod_pointer){ { sizeof(struct spa_pod_pointer_body), SPA_TYPE_Pointer }, { type, 0, value } }
331
332static inline int
333 spa_pod_builder_pointer(struct spa_pod_builder *builder, uint32_t type, const void *val)
334{
335 const struct spa_pod_pointer p = SPA_POD_INIT_Pointer(type, val);
336 return spa_pod_builder_primitive(builder, &p.pod);
337}
338
339#define SPA_POD_INIT_Fd(fd) (struct spa_pod_fd){ { sizeof(int64_t), SPA_TYPE_Fd }, fd }
340
341static inline int spa_pod_builder_fd(struct spa_pod_builder *builder, int64_t fd)
342{
343 const struct spa_pod_fd p = SPA_POD_INIT_Fd(fd);
344 return spa_pod_builder_primitive(builder, &p.pod);
345}
346
347#define SPA_POD_INIT_Rectangle(val) (struct spa_pod_rectangle){ { sizeof(struct spa_rectangle), SPA_TYPE_Rectangle }, val }
348
349static inline int
350 spa_pod_builder_rectangle(struct spa_pod_builder *builder, uint32_t width, uint32_t height)
351{
352 const struct spa_pod_rectangle p = SPA_POD_INIT_Rectangle(SPA_RECTANGLE(width, height));
353 return spa_pod_builder_primitive(builder, &p.pod);
354}
355
356#define SPA_POD_INIT_Fraction(val) (struct spa_pod_fraction){ { sizeof(struct spa_fraction), SPA_TYPE_Fraction }, val }
357
358static inline int
359 spa_pod_builder_fraction(struct spa_pod_builder *builder, uint32_t num, uint32_t denom)
360{
361 const struct spa_pod_fraction p = SPA_POD_INIT_Fraction(SPA_FRACTION(num, denom));
362 return spa_pod_builder_primitive(builder, &p.pod);
363}
364
365static inline int
366 spa_pod_builder_push_array(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
367{
368 const struct spa_pod_array p =
369 { {sizeof(struct spa_pod_array_body) - sizeof(struct spa_pod), SPA_TYPE_Array},
370 {{0, 0}} };
371 uint32_t offset = builder->state.offset;
372 int res = spa_pod_builder_raw(builder, &p, sizeof(p) - sizeof(struct spa_pod));
373 spa_pod_builder_push(builder, frame, &p.pod, offset);
374 return res;
375}
376
377static inline int
378 spa_pod_builder_array(struct spa_pod_builder *builder,
379 uint32_t child_size, uint32_t child_type, uint32_t n_elems, const void *elems)
380{
381 const struct spa_pod_array p = {
382 {(uint32_t)(sizeof(struct spa_pod_array_body) + n_elems * child_size), SPA_TYPE_Array},
383 {{child_size, child_type}}
384 };
385 int r, res = spa_pod_builder_raw(builder, &p, sizeof(p));
386 if ((r = spa_pod_builder_raw_padded(builder, elems, child_size * n_elems)) < 0)
387 res = r;
388 return res;
389}
390
391#define SPA_POD_INIT_CHOICE_BODY(type, flags, child_size, child_type) \
392 (struct spa_pod_choice_body) { type, flags, { child_size, child_type }}
393
394#define SPA_POD_INIT_Choice(type, ctype, child_type, n_vals, ...) \
395 (struct { struct spa_pod_choice choice; ctype vals[n_vals];}) \
396 { { { n_vals * sizeof(ctype) + sizeof(struct spa_pod_choice_body), SPA_TYPE_Choice }, \
397 { type, 0, { sizeof(ctype), child_type } } }, { __VA_ARGS__ } }
398
399static inline int
400 spa_pod_builder_push_choice(struct spa_pod_builder *builder, struct spa_pod_frame *frame,
401 uint32_t type, uint32_t flags)
402{
403 const struct spa_pod_choice p =
404 { {sizeof(struct spa_pod_choice_body) - sizeof(struct spa_pod), SPA_TYPE_Choice},
405 { type, flags, {0, 0}} };
406 uint32_t offset = builder->state.offset;
407 int res = spa_pod_builder_raw(builder, &p, sizeof(p) - sizeof(struct spa_pod));
408 spa_pod_builder_push(builder, frame, &p.pod, offset);
409 return res;
410}
411
412#define SPA_POD_INIT_Struct(size) (struct spa_pod_struct){ { size, SPA_TYPE_Struct } }
413
414static inline int
415 spa_pod_builder_push_struct(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
416{
417 const struct spa_pod_struct p = SPA_POD_INIT_Struct(0);
418 uint32_t offset = builder->state.offset;
419 int res = spa_pod_builder_raw(builder, &p, sizeof(p));
420 spa_pod_builder_push(builder, frame, &p.pod, offset);
421 return res;
422}
423
424#define SPA_POD_INIT_Object(size,type,id,...) (struct spa_pod_object){ { size, SPA_TYPE_Object }, { type, id }, ##__VA_ARGS__ }
425
426static inline int
427 spa_pod_builder_push_object(struct spa_pod_builder *builder, struct spa_pod_frame *frame,
428 uint32_t type, uint32_t id)
429{
430 const struct spa_pod_object p =
431 SPA_POD_INIT_Object(sizeof(struct spa_pod_object_body), type, id);
432 uint32_t offset = builder->state.offset;
433 int res = spa_pod_builder_raw(builder, &p, sizeof(p));
434 spa_pod_builder_push(builder, frame, &p.pod, offset);
435 return res;
436}
437
438#define SPA_POD_INIT_Prop(key,flags,size,type) \
439 (struct spa_pod_prop){ key, flags, { size, type } }
440
441static inline int
442 spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
443{
444 const struct { uint32_t key; uint32_t flags; } p = { key, flags };
445 return spa_pod_builder_raw(builder, &p, sizeof(p));
446}
447
448#define SPA_POD_INIT_Sequence(size,unit) \
449 (struct spa_pod_sequence){ { size, SPA_TYPE_Sequence}, {unit, 0 } }
450
451static inline int
452 spa_pod_builder_push_sequence(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t unit)
453{
454 const struct spa_pod_sequence p =
455 SPA_POD_INIT_Sequence(sizeof(struct spa_pod_sequence_body), unit);
456 uint32_t offset = builder->state.offset;
457 int res = spa_pod_builder_raw(builder, &p, sizeof(p));
458 spa_pod_builder_push(builder, frame, &p.pod, offset);
459 return res;
460}
461
462static inline uint32_t
463 spa_pod_builder_control(struct spa_pod_builder *builder, uint32_t offset, uint32_t type)
464{
465 const struct { uint32_t offset; uint32_t type; } p = { offset, type };
466 return spa_pod_builder_raw(builder, &p, sizeof(p));
467}
468
469static inline uint32_t spa_choice_from_id(char id)
470{
471 switch (id) {
472 case 'r':
473 return SPA_CHOICE_Range;
474 case 's':
475 return SPA_CHOICE_Step;
476 case 'e':
477 return SPA_CHOICE_Enum;
478 case 'f':
479 return SPA_CHOICE_Flags;
480 case 'n':
481 default:
482 return SPA_CHOICE_None;
483 }
484}
485
486#define SPA_POD_BUILDER_COLLECT(builder,type,args) \
487do { \
488 switch (type) { \
489 case 'b': \
490 spa_pod_builder_bool(builder, !!va_arg(args, int)); \
491 break; \
492 case 'I': \
493 spa_pod_builder_id(builder, va_arg(args, uint32_t)); \
494 break; \
495 case 'i': \
496 spa_pod_builder_int(builder, va_arg(args, int)); \
497 break; \
498 case 'l': \
499 spa_pod_builder_long(builder, va_arg(args, int64_t)); \
500 break; \
501 case 'f': \
502 spa_pod_builder_float(builder, va_arg(args, double)); \
503 break; \
504 case 'd': \
505 spa_pod_builder_double(builder, va_arg(args, double)); \
506 break; \
507 case 's': \
508 { \
509 char *strval = va_arg(args, char *); \
510 if (strval != NULL) { \
511 size_t len = strlen(strval); \
512 spa_pod_builder_string_len(builder, strval, len); \
513 } \
514 else \
515 spa_pod_builder_none(builder); \
516 break; \
517 } \
518 case 'S': \
519 { \
520 char *strval = va_arg(args, char *); \
521 size_t len = va_arg(args, int); \
522 spa_pod_builder_string_len(builder, strval, len); \
523 break; \
524 } \
525 case 'y': \
526 { \
527 void *ptr = va_arg(args, void *); \
528 int len = va_arg(args, int); \
529 spa_pod_builder_bytes(builder, ptr, len); \
530 break; \
531 } \
532 case 'R': \
533 { \
534 struct spa_rectangle *rectval = \
535 va_arg(args, struct spa_rectangle *); \
536 spa_pod_builder_rectangle(builder, \
537 rectval->width, rectval->height); \
538 break; \
539 } \
540 case 'F': \
541 { \
542 struct spa_fraction *fracval = \
543 va_arg(args, struct spa_fraction *); \
544 spa_pod_builder_fraction(builder, fracval->num, fracval->denom);\
545 break; \
546 } \
547 case 'a': \
548 { \
549 int child_size = va_arg(args, int); \
550 int child_type = va_arg(args, int); \
551 int n_elems = va_arg(args, int); \
552 void *elems = va_arg(args, void *); \
553 spa_pod_builder_array(builder, child_size, \
554 child_type, n_elems, elems); \
555 break; \
556 } \
557 case 'p': \
558 { \
559 int t = va_arg(args, uint32_t); \
560 spa_pod_builder_pointer(builder, t, va_arg(args, void *)); \
561 break; \
562 } \
563 case 'h': \
564 spa_pod_builder_fd(builder, va_arg(args, int)); \
565 break; \
566 case 'P': \
567 case 'O': \
568 case 'T': \
569 case 'V': \
570 { \
571 struct spa_pod *pod = va_arg(args, struct spa_pod *); \
572 if (pod == NULL) \
573 spa_pod_builder_none(builder); \
574 else \
575 spa_pod_builder_primitive(builder, pod); \
576 break; \
577 } \
578 } \
579} while(false)
580
581static inline int
582 spa_pod_builder_addv(struct spa_pod_builder *builder, va_list args)
583{
584 int res = 0;
585 struct spa_pod_frame *frame = builder->state.frame;
586 uint32_t ftype = frame ? frame->pod.type : (uint32_t)SPA_TYPE_None;
587
588 do {
589 const char *format;
590 int n_values = 1;
591 struct spa_pod_frame f;
592 bool choice;
593
594 switch (ftype) {
595 case SPA_TYPE_Object:
596 {
597 uint32_t key = va_arg(args, uint32_t);
598 if (key == 0)
599 goto exit;
600 spa_pod_builder_prop(builder, key, 0);
601 break;
602 }
603 case SPA_TYPE_Sequence:
604 {
605 uint32_t offset = va_arg(args, uint32_t);
606 uint32_t type = va_arg(args, uint32_t);
607 if (type == 0)
608 goto exit;
609 spa_pod_builder_control(builder, offset, type);
610 SPA_FALLTHROUGH
611 }
612 default:
613 break;
614 }
615 if ((format = va_arg(args, const char *)) == NULL)
616 break;
617
618 choice = *format == '?';
619 if (choice) {
620 uint32_t type = spa_choice_from_id(*++format);
621 if (*format != '\0')
622 format++;
623
624 spa_pod_builder_push_choice(builder, &f, type, 0);
625
626 n_values = va_arg(args, int);
627 }
628 while (n_values-- > 0)
629 SPA_POD_BUILDER_COLLECT(builder, *format, args);
630
631 if (choice)
632 spa_pod_builder_pop(builder, &f);
633 } while (true);
634
635 exit:
636 return res;
637}
638
639static inline int spa_pod_builder_add(struct spa_pod_builder *builder, ...)
640{
641 int res;
642 va_list args;
643
644 va_start(args, builder);
645 res = spa_pod_builder_addv(builder, args);
646 va_end(args);
647
648 return res;
649}
650
651#define spa_pod_builder_add_object(b,type,id,...) \
652({ \
653 struct spa_pod_frame _f; \
654 spa_pod_builder_push_object(b, &_f, type, id); \
655 spa_pod_builder_add(b, ##__VA_ARGS__, 0); \
656 spa_pod_builder_pop(b, &_f); \
657})
658
659#define spa_pod_builder_add_struct(b,...) \
660({ \
661 struct spa_pod_frame _f; \
662 spa_pod_builder_push_struct(b, &_f); \
663 spa_pod_builder_add(b, ##__VA_ARGS__, NULL); \
664 spa_pod_builder_pop(b, &_f); \
665})
666
667#define spa_pod_builder_add_sequence(b,unit,...) \
668({ \
669 struct spa_pod_frame _f; \
670 spa_pod_builder_push_sequence(b, &_f, unit); \
671 spa_pod_builder_add(b, ##__VA_ARGS__, 0, 0); \
672 spa_pod_builder_pop(b, &_f); \
673})
674
676static inline struct spa_pod *
677 spa_pod_copy(const struct spa_pod *pod)
678{
679 size_t size;
680 struct spa_pod *c;
681
682 size = SPA_POD_SIZE(pod);
683 if ((c = (struct spa_pod *) malloc(size)) == NULL)
684 return NULL;
685 return (struct spa_pod *) memcpy(c, pod, size);
686}
687
692#ifdef __cplusplus
693} /* extern "C" */
694#endif
695
696#endif /* SPA_POD_BUILDER_H */
SPA_CALLBACKS_INIT
#define SPA_CALLBACKS_INIT(_funcs, _data)
Initialize the set of functions funcs as a spa_callbacks, together with _data.
Definition: hook.h:154
spa_callbacks_call_res
#define spa_callbacks_call_res(callbacks, type, res, method, vers,...)
Invoke method named method in the callbacks.
Definition: hook.h:219
SPA_POD_INIT_Double
#define SPA_POD_INIT_Double(val)
Definition: builder.h:290
spa_pod_builder_reserve_bytes
static void * spa_pod_builder_reserve_bytes(struct spa_pod_builder *builder, uint32_t len)
Definition: builder.h:342
spa_pod_builder_prop
static int spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
Definition: builder.h:468
SPA_POD_INIT_None
#define SPA_POD_INIT_None()
Definition: builder.h:229
SPA_POD_INIT
#define SPA_POD_INIT(size, type)
Definition: builder.h:226
spa_pod_builder_string
static int spa_pod_builder_string(struct spa_pod_builder *builder, const char *str)
Definition: builder.h:323
spa_pod_builder_child
static int spa_pod_builder_child(struct spa_pod_builder *builder, uint32_t size, uint32_t type)
Definition: builder.h:237
spa_pod_builder_fraction
static int spa_pod_builder_fraction(struct spa_pod_builder *builder, uint32_t num, uint32_t denom)
Definition: builder.h:383
spa_pod_builder_rectangle
static int spa_pod_builder_rectangle(struct spa_pod_builder *builder, uint32_t width, uint32_t height)
Definition: builder.h:373
spa_pod_builder_float
static int spa_pod_builder_float(struct spa_pod_builder *builder, float val)
Definition: builder.h:283
SPA_POD_BODY_CONST
#define SPA_POD_BODY_CONST(pod)
Definition: pod.h:61
SPA_POD_INIT_Object
#define SPA_POD_INIT_Object(size, type, id,...)
Definition: builder.h:450
SPA_POD_BUILDER_FLAG_BODY
#define SPA_POD_BUILDER_FLAG_BODY
Definition: builder.h:55
spa_pod_builder_push
static void spa_pod_builder_push(struct spa_pod_builder *builder, struct spa_pod_frame *frame, const struct spa_pod *pod, uint32_t offset)
Definition: builder.h:133
spa_pod_builder_double
static int spa_pod_builder_double(struct spa_pod_builder *builder, double val)
Definition: builder.h:292
spa_pod_builder_write_string
static int spa_pod_builder_write_string(struct spa_pod_builder *builder, const char *str, uint32_t len)
Definition: builder.h:302
SPA_POD_INIT_Sequence
#define SPA_POD_INIT_Sequence(size, unit)
Definition: builder.h:474
SPA_POD_INIT_Rectangle
#define SPA_POD_INIT_Rectangle(val)
Definition: builder.h:370
spa_pod_builder_set_callbacks
static void spa_pod_builder_set_callbacks(struct spa_pod_builder *builder, const struct spa_pod_builder_callbacks *callbacks, void *data)
Definition: builder.h:91
SPA_POD_INIT_Bool
#define SPA_POD_INIT_Bool(val)
Definition: builder.h:245
spa_pod_builder_id
static int spa_pod_builder_id(struct spa_pod_builder *builder, uint32_t val)
Definition: builder.h:256
spa_pod_builder_add
static int spa_pod_builder_add(struct spa_pod_builder *builder,...)
Definition: builder.h:665
SPA_POD_INIT_String
#define SPA_POD_INIT_String(len)
Definition: builder.h:299
spa_pod_builder_fd
static int spa_pod_builder_fd(struct spa_pod_builder *builder, int64_t fd)
Definition: builder.h:363
SPA_POD_BODY
#define SPA_POD_BODY(pod)
Definition: pod.h:59
spa_pod_builder_frame
static struct spa_pod * spa_pod_builder_frame(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:125
spa_pod_builder_reset
static void spa_pod_builder_reset(struct spa_pod_builder *builder, struct spa_pod_builder_state *state)
Definition: builder.h:98
spa_pod_builder_none
static int spa_pod_builder_none(struct spa_pod_builder *builder)
Definition: builder.h:231
SPA_POD_INIT_Id
#define SPA_POD_INIT_Id(val)
Definition: builder.h:254
spa_pod_builder_push_sequence
static int spa_pod_builder_push_sequence(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t unit)
Definition: builder.h:478
spa_pod_builder_raw_padded
static int spa_pod_builder_raw_padded(struct spa_pod_builder *builder, const void *data, uint32_t size)
Definition: builder.h:178
SPA_POD_BODY_SIZE
#define SPA_POD_BODY_SIZE(pod)
Definition: pod.h:46
SPA_POD_BUILDER_INIT
#define SPA_POD_BUILDER_INIT(buffer, size)
Definition: builder.h:82
spa_pod_builder_pop
static void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:186
spa_pod_builder_pad
static int spa_pod_builder_pad(struct spa_pod_builder *builder, uint32_t size)
Definition: builder.h:170
spa_pod_builder_string_len
static int spa_pod_builder_string_len(struct spa_pod_builder *builder, const char *str, uint32_t len)
Definition: builder.h:314
SPA_POD_INIT_Struct
#define SPA_POD_INIT_Struct(size)
Definition: builder.h:437
spa_pod_builder_push_array
static int spa_pod_builder_push_array(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:390
spa_pod_builder_primitive
static int spa_pod_builder_primitive(struct spa_pod_builder *builder, const struct spa_pod *p)
Definition: builder.h:204
spa_choice_from_id
static uint32_t spa_choice_from_id(char id)
Definition: builder.h:495
spa_pod_builder_push_struct
static int spa_pod_builder_push_struct(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:440
spa_pod_builder_control
static uint32_t spa_pod_builder_control(struct spa_pod_builder *builder, uint32_t offset, uint32_t type)
Definition: builder.h:489
spa_pod_builder_get_state
static void spa_pod_builder_get_state(struct spa_pod_builder *builder, struct spa_pod_builder_state *state)
Definition: builder.h:85
spa_pod_builder_bool
static int spa_pod_builder_bool(struct spa_pod_builder *builder, bool val)
Definition: builder.h:247
SPA_POD_BUILDER_COLLECT
#define SPA_POD_BUILDER_COLLECT(builder, type, args)
Definition: builder.h:512
spa_pod_copy
static struct spa_pod * spa_pod_copy(const struct spa_pod *pod)
Copy a pod structure.
Definition: builder.h:703
spa_pod_builder_raw
static int spa_pod_builder_raw(struct spa_pod_builder *builder, const void *data, uint32_t size)
Definition: builder.h:148
SPA_POD_INIT_Int
#define SPA_POD_INIT_Int(val)
Definition: builder.h:263
spa_pod_builder_bytes
static int spa_pod_builder_bytes(struct spa_pod_builder *builder, const void *bytes, uint32_t len)
Definition: builder.h:333
spa_pod_builder_push_choice
static int spa_pod_builder_push_choice(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t type, uint32_t flags)
Definition: builder.h:424
spa_pod_builder_int
static int spa_pod_builder_int(struct spa_pod_builder *builder, int32_t val)
Definition: builder.h:265
spa_pod_builder_init
static void spa_pod_builder_init(struct spa_pod_builder *builder, void *data, uint32_t size)
Definition: builder.h:107
spa_pod_builder_push_object
static int spa_pod_builder_push_object(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t type, uint32_t id)
Definition: builder.h:453
SPA_POD_INIT_Float
#define SPA_POD_INIT_Float(val)
Definition: builder.h:281
spa_pod_builder_long
static int spa_pod_builder_long(struct spa_pod_builder *builder, int64_t val)
Definition: builder.h:274
SPA_POD_INIT_Bytes
#define SPA_POD_INIT_Bytes(len)
Definition: builder.h:330
SPA_POD_INIT_Fd
#define SPA_POD_INIT_Fd(fd)
Definition: builder.h:361
spa_pod_builder_array
static int spa_pod_builder_array(struct spa_pod_builder *builder, uint32_t child_size, uint32_t child_type, uint32_t n_elems, const void *elems)
Definition: builder.h:402
SPA_POD_INIT_Long
#define SPA_POD_INIT_Long(val)
Definition: builder.h:272
SPA_POD_INIT_Pointer
#define SPA_POD_INIT_Pointer(type, value)
Definition: builder.h:351
SPA_POD_INIT_Fraction
#define SPA_POD_INIT_Fraction(val)
Definition: builder.h:380
SPA_POD_BUILDER_FLAG_FIRST
#define SPA_POD_BUILDER_FLAG_FIRST
Definition: builder.h:57
SPA_POD_SIZE
#define SPA_POD_SIZE(pod)
Definition: pod.h:50
spa_pod_builder_addv
static int spa_pod_builder_addv(struct spa_pod_builder *builder, va_list args)
Definition: builder.h:608
spa_pod_builder_deref
static struct spa_pod * spa_pod_builder_deref(struct spa_pod_builder *builder, uint32_t offset)
Definition: builder.h:113
spa_pod_builder_pointer
static int spa_pod_builder_pointer(struct spa_pod_builder *builder, uint32_t type, const void *val)
Definition: builder.h:354
SPA_CHOICE_Step
@ SPA_CHOICE_Step
range with step: default, min, max, step
Definition: pod.h:169
SPA_CHOICE_None
@ SPA_CHOICE_None
no choice, first value is current
Definition: pod.h:167
SPA_CHOICE_Flags
@ SPA_CHOICE_Flags
flags: default, possible flags,...
Definition: pod.h:171
SPA_CHOICE_Range
@ SPA_CHOICE_Range
range: default, min, max
Definition: pod.h:168
SPA_CHOICE_Enum
@ SPA_CHOICE_Enum
list: default, alternative,...
Definition: pod.h:170
SPA_TYPE_Object
@ SPA_TYPE_Object
Definition: type.h:65
SPA_TYPE_None
@ SPA_TYPE_None
Definition: type.h:51
SPA_TYPE_Sequence
@ SPA_TYPE_Sequence
Definition: type.h:66
SPA_TYPE_Choice
@ SPA_TYPE_Choice
Definition: type.h:69
SPA_TYPE_Array
@ SPA_TYPE_Array
Definition: type.h:63
SPA_ROUND_UP_N
#define SPA_ROUND_UP_N(num, align)
Definition: defs.h:296
SPA_FRACTION
#define SPA_FRACTION(num, denom)
Definition: defs.h:120
SPA_FLAG_IS_SET
#define SPA_FLAG_IS_SET(field, flag)
Definition: defs.h:82
SPA_FALLTHROUGH
#define SPA_FALLTHROUGH
SPA_FALLTHROUGH is an annotation to suppress compiler warnings about switch cases that fall through w...
Definition: defs.h:76
SPA_FLAG_CLEAR
#define SPA_FLAG_CLEAR(field, flag)
Definition: defs.h:86
SPA_PTROFF
#define SPA_PTROFF(ptr_, offset_, type_)
Return the address (buffer + offset) as pointer of type.
Definition: defs.h:183
SPA_RECTANGLE
#define SPA_RECTANGLE(width, height)
Definition: defs.h:99
hook.h
spa/utils/hook.h
iter.h
spa/pod/iter.h
spa_callbacks
Callbacks, contains the structure with functions and the data passed to the functions.
Definition: hook.h:136
spa_callbacks::data
void * data
Definition: hook.h:138
spa_pod_array_body
Definition: pod.h:141
spa_pod_array
Definition: pod.h:146
spa_pod_array::pod
struct spa_pod pod
Definition: pod.h:147
spa_pod_bool
Definition: pod.h:71
spa_pod_bool::pod
struct spa_pod pod
Definition: pod.h:72
spa_pod_builder_callbacks
Definition: builder.h:65
spa_pod_builder_callbacks::overflow
int(* overflow)(void *data, uint32_t size)
Definition: builder.h:70
spa_pod_builder_callbacks::version
uint32_t version
Definition: builder.h:68
spa_pod_builder_state
Definition: builder.h:52
spa_pod_builder_state::flags
uint32_t flags
Definition: builder.h:58
spa_pod_builder_state::offset
uint32_t offset
Definition: builder.h:53
spa_pod_builder_state::frame
struct spa_pod_frame * frame
Definition: builder.h:59
spa_pod_builder
Definition: builder.h:73
spa_pod_builder::_padding
uint32_t _padding
Definition: builder.h:76
spa_pod_builder::callbacks
struct spa_callbacks callbacks
Definition: builder.h:78
spa_pod_builder::data
void * data
Definition: builder.h:74
spa_pod_builder::state
struct spa_pod_builder_state state
Definition: builder.h:77
spa_pod_builder::size
uint32_t size
Definition: builder.h:75
spa_pod_bytes
Definition: pod.h:110
spa_pod_choice_body
Definition: pod.h:174
spa_pod_choice_body::type
uint32_t type
type of choice, one of enum spa_choice_type
Definition: pod.h:175
spa_pod_choice_body::flags
uint32_t flags
extra flags
Definition: pod.h:176
spa_pod_choice
Definition: pod.h:182
spa_pod_choice::pod
struct spa_pod pod
Definition: pod.h:183
spa_pod_double
Definition: pod.h:100
spa_pod_double::pod
struct spa_pod pod
Definition: pod.h:101
spa_pod_fd
Definition: pod.h:219
spa_pod_fd::pod
struct spa_pod pod
Definition: pod.h:220
spa_pod_float
Definition: pod.h:94
spa_pod_float::pod
struct spa_pod pod
Definition: pod.h:95
spa_pod_fraction
Definition: pod.h:120
spa_pod_fraction::pod
struct spa_pod pod
Definition: pod.h:121
spa_pod_frame
Definition: iter.h:47
spa_pod_frame::pod
struct spa_pod pod
Definition: iter.h:48
spa_pod_frame::offset
uint32_t offset
Definition: iter.h:50
spa_pod_frame::parent
struct spa_pod_frame * parent
Definition: iter.h:49
spa_pod_frame::flags
uint32_t flags
Definition: iter.h:51
spa_pod_id
Definition: pod.h:77
spa_pod_id::pod
struct spa_pod pod
Definition: pod.h:78
spa_pod_int
Definition: pod.h:83
spa_pod_int::pod
struct spa_pod pod
Definition: pod.h:84
spa_pod_long
Definition: pod.h:89
spa_pod_long::pod
struct spa_pod pod
Definition: pod.h:90
spa_pod_object_body
Definition: pod.h:197
spa_pod_object
Definition: pod.h:203
spa_pod_object::pod
struct spa_pod pod
Definition: pod.h:204
spa_pod_pointer
Definition: pod.h:214
spa_pod_pointer::pod
struct spa_pod pod
Definition: pod.h:215
spa_pod_rectangle
Definition: pod.h:115
spa_pod_rectangle::pod
struct spa_pod pod
Definition: pod.h:116
spa_pod_sequence_body
Definition: pod.h:261
spa_pod_sequence
a sequence of timed controls
Definition: pod.h:268
spa_pod_sequence::pod
struct spa_pod pod
Definition: pod.h:269
spa_pod_string
Definition: pod.h:105
spa_pod_struct
Definition: pod.h:187
spa_pod_struct::pod
struct spa_pod pod
Definition: pod.h:188
spa_pod
Definition: pod.h:63
spa_pod::type
uint32_t type
Definition: pod.h:65
spa_pod::size
uint32_t size
Definition: pod.h:64
vararg.h
spa/pod/vararg.h