PipeWire  1.3.83
builder.h
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1 /* Simple Plugin API */
2 /* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
3 /* SPDX-License-Identifier: MIT */
4 
5 #ifndef SPA_POD_BUILDER_H
6 #define SPA_POD_BUILDER_H
7 
8 #ifdef __cplusplus
9 extern "C" {
10 #endif
11 
21 #include <stdarg.h>
22 
23 #include <spa/utils/hook.h>
24 #include <spa/pod/iter.h>
25 #include <spa/pod/vararg.h>
26 
27 #ifndef SPA_API_POD_BUILDER
28  #ifdef SPA_API_IMPL
29  #define SPA_API_POD_BUILDER SPA_API_IMPL
30  #else
31  #define SPA_API_POD_BUILDER static inline
32  #endif
33 #endif
34 
35 struct spa_pod_builder_state {
36  uint32_t offset;
37 #define SPA_POD_BUILDER_FLAG_BODY (1<<0)
38 #define SPA_POD_BUILDER_FLAG_FIRST (1<<1)
39  uint32_t flags;
40  struct spa_pod_frame *frame;
41 };
42 
44 
46 #define SPA_VERSION_POD_BUILDER_CALLBACKS 0
47  uint32_t version;
48 
49  int (*overflow) (void *data, uint32_t size);
50 };
51 
52 struct spa_pod_builder {
53  void *data;
54  uint32_t size;
55  uint32_t _padding;
58 };
59 
60 #define SPA_POD_BUILDER_INIT(buffer,size) ((struct spa_pod_builder){ (buffer), (size), 0, {0,0,NULL},{NULL,NULL}})
61 
64 {
65  *state = builder->state;
66 }
67 
70  const struct spa_pod_builder_callbacks *callbacks, void *data)
71 {
72  builder->callbacks = SPA_CALLBACKS_INIT(callbacks, data);
73 }
74 
76 spa_pod_builder_reset(struct spa_pod_builder *builder, struct spa_pod_builder_state *state)
77 {
78  struct spa_pod_frame *f;
79  uint32_t size = builder->state.offset - state->offset;
80  builder->state = *state;
81  for (f = builder->state.frame; f ; f = f->parent)
82  f->pod.size -= size;
83 }
84 
85 SPA_API_POD_BUILDER void spa_pod_builder_init(struct spa_pod_builder *builder, void *data, uint32_t size)
86 {
87  *builder = SPA_POD_BUILDER_INIT(data, size);
88 }
89 
91 spa_pod_builder_deref(struct spa_pod_builder *builder, uint32_t offset)
92 {
93  uint32_t size = builder->size;
94  if (offset + 8 <= size) {
95  struct spa_pod *pod = SPA_PTROFF(builder->data, offset, struct spa_pod);
96  if (offset + SPA_POD_SIZE(pod) <= size)
97  return pod;
98  }
99  return NULL;
100 }
101 
103 spa_pod_builder_frame(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
104 {
105  if (frame->offset + SPA_POD_SIZE(&frame->pod) <= builder->size)
106  return SPA_PTROFF(builder->data, frame->offset, struct spa_pod);
107  return NULL;
108 }
109 
111 spa_pod_builder_push(struct spa_pod_builder *builder,
112  struct spa_pod_frame *frame,
113  const struct spa_pod *pod,
114  uint32_t offset)
115 {
116  frame->pod = *pod;
117  frame->offset = offset;
118  frame->parent = builder->state.frame;
119  frame->flags = builder->state.flags;
120  builder->state.frame = frame;
121 
122  if (frame->pod.type == SPA_TYPE_Array || frame->pod.type == SPA_TYPE_Choice)
124 }
125 
126 SPA_API_POD_BUILDER int spa_pod_builder_raw(struct spa_pod_builder *builder, const void *data, uint32_t size)
127 {
128  int res = 0;
129  struct spa_pod_frame *f;
130  uint32_t offset = builder->state.offset;
131 
132  if (offset + size > builder->size) {
133  res = -ENOSPC;
134  if (offset <= builder->size)
137  overflow, 0, offset + size);
138  }
139  if (res == 0 && data)
140  memcpy(SPA_PTROFF(builder->data, offset, void), data, size);
141 
142  builder->state.offset += size;
143 
144  for (f = builder->state.frame; f ; f = f->parent)
145  f->pod.size += size;
146 
147  return res;
148 }
149 
150 SPA_API_POD_BUILDER int spa_pod_builder_pad(struct spa_pod_builder *builder, uint32_t size)
151 {
152  uint64_t zeroes = 0;
153  size = SPA_ROUND_UP_N(size, 8) - size;
154  return size ? spa_pod_builder_raw(builder, &zeroes, size) : 0;
155 }
156 
158 spa_pod_builder_raw_padded(struct spa_pod_builder *builder, const void *data, uint32_t size)
159 {
160  int r, res = spa_pod_builder_raw(builder, data, size);
161  if ((r = spa_pod_builder_pad(builder, size)) < 0)
162  res = r;
163  return res;
164 }
165 
166 SPA_API_POD_BUILDER void *spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
167 {
168  struct spa_pod *pod;
169 
171  const struct spa_pod p = { 0, SPA_TYPE_None };
172  spa_pod_builder_raw(builder, &p, sizeof(p));
173  }
174  if ((pod = (struct spa_pod*)spa_pod_builder_frame(builder, frame)) != NULL)
175  *pod = frame->pod;
176 
177  builder->state.frame = frame->parent;
178  builder->state.flags = frame->flags;
179  spa_pod_builder_pad(builder, builder->state.offset);
180  return pod;
181 }
182 
184 spa_pod_builder_primitive(struct spa_pod_builder *builder, const struct spa_pod *p)
185 {
186  const void *data;
187  uint32_t size;
188  int r, res;
189 
190  if (builder->state.flags == SPA_POD_BUILDER_FLAG_BODY) {
191  data = SPA_POD_BODY_CONST(p);
192  size = SPA_POD_BODY_SIZE(p);
193  } else {
194  data = p;
195  size = SPA_POD_SIZE(p);
197  }
198  res = spa_pod_builder_raw(builder, data, size);
199  if (builder->state.flags != SPA_POD_BUILDER_FLAG_BODY)
200  if ((r = spa_pod_builder_pad(builder, size)) < 0)
201  res = r;
202  return res;
203 }
204 
205 #define SPA_POD_INIT(size,type) ((struct spa_pod) { (size), (type) })
206 
207 #define SPA_POD_INIT_None() SPA_POD_INIT(0, SPA_TYPE_None)
208 
210 {
211  const struct spa_pod p = SPA_POD_INIT_None();
212  return spa_pod_builder_primitive(builder, &p);
213 }
214 
215 SPA_API_POD_BUILDER int spa_pod_builder_child(struct spa_pod_builder *builder, uint32_t size, uint32_t type)
216 {
217  const struct spa_pod p = SPA_POD_INIT(size,type);
219  return spa_pod_builder_raw(builder, &p, sizeof(p));
220 }
221 
222 #define SPA_POD_INIT_Bool(val) ((struct spa_pod_bool){ { sizeof(uint32_t), SPA_TYPE_Bool }, (val) ? 1 : 0, 0 })
223 
224 SPA_API_POD_BUILDER int spa_pod_builder_bool(struct spa_pod_builder *builder, bool val)
225 {
226  const struct spa_pod_bool p = SPA_POD_INIT_Bool(val);
227  return spa_pod_builder_primitive(builder, &p.pod);
228 }
229 
230 #define SPA_POD_INIT_Id(val) ((struct spa_pod_id){ { sizeof(uint32_t), SPA_TYPE_Id }, (val), 0 })
231 
232 SPA_API_POD_BUILDER int spa_pod_builder_id(struct spa_pod_builder *builder, uint32_t val)
233 {
234  const struct spa_pod_id p = SPA_POD_INIT_Id(val);
235  return spa_pod_builder_primitive(builder, &p.pod);
236 }
237 
238 #define SPA_POD_INIT_Int(val) ((struct spa_pod_int){ { sizeof(int32_t), SPA_TYPE_Int }, (val), 0 })
239 
240 SPA_API_POD_BUILDER int spa_pod_builder_int(struct spa_pod_builder *builder, int32_t val)
241 {
242  const struct spa_pod_int p = SPA_POD_INIT_Int(val);
243  return spa_pod_builder_primitive(builder, &p.pod);
244 }
245 
246 #define SPA_POD_INIT_Long(val) ((struct spa_pod_long){ { sizeof(int64_t), SPA_TYPE_Long }, (val) })
247 
249 {
250  const struct spa_pod_long p = SPA_POD_INIT_Long(val);
251  return spa_pod_builder_primitive(builder, &p.pod);
252 }
253 
254 #define SPA_POD_INIT_Float(val) ((struct spa_pod_float){ { sizeof(float), SPA_TYPE_Float }, (val), 0 })
255 
256 SPA_API_POD_BUILDER int spa_pod_builder_float(struct spa_pod_builder *builder, float val)
257 {
258  const struct spa_pod_float p = SPA_POD_INIT_Float(val);
259  return spa_pod_builder_primitive(builder, &p.pod);
260 }
261 
262 #define SPA_POD_INIT_Double(val) ((struct spa_pod_double){ { sizeof(double), SPA_TYPE_Double }, (val) })
263 
265 {
266  const struct spa_pod_double p = SPA_POD_INIT_Double(val);
267  return spa_pod_builder_primitive(builder, &p.pod);
268 }
269 
270 #define SPA_POD_INIT_String(len) ((struct spa_pod_string){ { (len), SPA_TYPE_String } })
271 
273 spa_pod_builder_write_string(struct spa_pod_builder *builder, const char *str, uint32_t len)
274 {
275  int r, res;
276  res = spa_pod_builder_raw(builder, str, len);
277  if ((r = spa_pod_builder_raw(builder, "", 1)) < 0)
278  res = r;
279  if ((r = spa_pod_builder_pad(builder, builder->state.offset)) < 0)
280  res = r;
281  return res;
282 }
283 
285 spa_pod_builder_string_len(struct spa_pod_builder *builder, const char *str, uint32_t len)
286 {
287  const struct spa_pod_string p = SPA_POD_INIT_String(len+1);
288  int r, res = spa_pod_builder_raw(builder, &p, sizeof(p));
289  if ((r = spa_pod_builder_write_string(builder, str, len)) < 0)
290  res = r;
291  return res;
292 }
293 
294 SPA_API_POD_BUILDER int spa_pod_builder_string(struct spa_pod_builder *builder, const char *str)
295 {
296  uint32_t len = str ? strlen(str) : 0;
297  return spa_pod_builder_string_len(builder, str ? str : "", len);
298 }
299 
300 #define SPA_POD_INIT_Bytes(len) ((struct spa_pod_bytes){ { (len), SPA_TYPE_Bytes } })
301 
303 spa_pod_builder_bytes(struct spa_pod_builder *builder, const void *bytes, uint32_t len)
304 {
305  const struct spa_pod_bytes p = SPA_POD_INIT_Bytes(len);
306  int r, res = spa_pod_builder_raw(builder, &p, sizeof(p));
307  if ((r = spa_pod_builder_raw_padded(builder, bytes, len)) < 0)
308  res = r;
309  return res;
310 }
311 SPA_API_POD_BUILDER void *
312 spa_pod_builder_reserve_bytes(struct spa_pod_builder *builder, uint32_t len)
313 {
314  uint32_t offset = builder->state.offset;
315  if (spa_pod_builder_bytes(builder, NULL, len) < 0)
316  return NULL;
317  return SPA_POD_BODY(spa_pod_builder_deref(builder, offset));
318 }
319 
320 #define SPA_POD_INIT_Pointer(type,value) ((struct spa_pod_pointer){ { sizeof(struct spa_pod_pointer_body), SPA_TYPE_Pointer }, { (type), 0, (value) } })
321 
323 spa_pod_builder_pointer(struct spa_pod_builder *builder, uint32_t type, const void *val)
324 {
325  const struct spa_pod_pointer p = SPA_POD_INIT_Pointer(type, val);
326  return spa_pod_builder_primitive(builder, &p.pod);
327 }
328 
329 #define SPA_POD_INIT_Fd(fd) ((struct spa_pod_fd){ { sizeof(int64_t), SPA_TYPE_Fd }, (fd) })
330 
331 SPA_API_POD_BUILDER int spa_pod_builder_fd(struct spa_pod_builder *builder, int64_t fd)
332 {
333  const struct spa_pod_fd p = SPA_POD_INIT_Fd(fd);
334  return spa_pod_builder_primitive(builder, &p.pod);
335 }
336 
337 #define SPA_POD_INIT_Rectangle(val) ((struct spa_pod_rectangle){ { sizeof(struct spa_rectangle), SPA_TYPE_Rectangle }, (val) })
338 
340 spa_pod_builder_rectangle(struct spa_pod_builder *builder, uint32_t width, uint32_t height)
341 {
342  const struct spa_pod_rectangle p = SPA_POD_INIT_Rectangle(SPA_RECTANGLE(width, height));
343  return spa_pod_builder_primitive(builder, &p.pod);
344 }
345 
346 #define SPA_POD_INIT_Fraction(val) ((struct spa_pod_fraction){ { sizeof(struct spa_fraction), SPA_TYPE_Fraction }, (val) })
347 
349 spa_pod_builder_fraction(struct spa_pod_builder *builder, uint32_t num, uint32_t denom)
350 {
351  const struct spa_pod_fraction p = SPA_POD_INIT_Fraction(SPA_FRACTION(num, denom));
352  return spa_pod_builder_primitive(builder, &p.pod);
353 }
354 
356 spa_pod_builder_push_array(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
357 {
358  const struct spa_pod_array p =
359  { {sizeof(struct spa_pod_array_body) - sizeof(struct spa_pod), SPA_TYPE_Array},
360  {{0, 0}} };
361  uint32_t offset = builder->state.offset;
362  int res = spa_pod_builder_raw(builder, &p, sizeof(p) - sizeof(struct spa_pod));
363  spa_pod_builder_push(builder, frame, &p.pod, offset);
364  return res;
365 }
366 
368 spa_pod_builder_array(struct spa_pod_builder *builder,
369  uint32_t child_size, uint32_t child_type, uint32_t n_elems, const void *elems)
370 {
371  const struct spa_pod_array p = {
372  {(uint32_t)(sizeof(struct spa_pod_array_body) + n_elems * child_size), SPA_TYPE_Array},
373  {{child_size, child_type}}
374  };
375  int r, res = spa_pod_builder_raw(builder, &p, sizeof(p));
376  if ((r = spa_pod_builder_raw_padded(builder, elems, child_size * n_elems)) < 0)
377  res = r;
378  return res;
379 }
380 
381 #define SPA_POD_INIT_CHOICE_BODY(type, flags, child_size, child_type) \
382  ((struct spa_pod_choice_body) { (type), (flags), { (child_size), (child_type) }})
383 
384 #define SPA_POD_INIT_Choice(type, ctype, child_type, n_vals, ...) \
385  ((struct { struct spa_pod_choice choice; ctype vals[(n_vals)];}) \
386  { { { (n_vals) * sizeof(ctype) + sizeof(struct spa_pod_choice_body), SPA_TYPE_Choice }, \
387  { (type), 0, { sizeof(ctype), (child_type) } } }, { __VA_ARGS__ } })
388 
390 spa_pod_builder_push_choice(struct spa_pod_builder *builder, struct spa_pod_frame *frame,
391  uint32_t type, uint32_t flags)
392 {
393  const struct spa_pod_choice p =
394  { {sizeof(struct spa_pod_choice_body) - sizeof(struct spa_pod), SPA_TYPE_Choice},
395  { type, flags, {0, 0}} };
396  uint32_t offset = builder->state.offset;
397  int res = spa_pod_builder_raw(builder, &p, sizeof(p) - sizeof(struct spa_pod));
398  spa_pod_builder_push(builder, frame, &p.pod, offset);
399  return res;
400 }
401 
402 #define SPA_POD_INIT_Struct(size) ((struct spa_pod_struct){ { (size), SPA_TYPE_Struct } })
403 
405 spa_pod_builder_push_struct(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
406 {
407  const struct spa_pod_struct p = SPA_POD_INIT_Struct(0);
408  uint32_t offset = builder->state.offset;
409  int res = spa_pod_builder_raw(builder, &p, sizeof(p));
410  spa_pod_builder_push(builder, frame, &p.pod, offset);
411  return res;
412 }
413 
414 #define SPA_POD_INIT_Object(size,type,id,...) ((struct spa_pod_object){ { (size), SPA_TYPE_Object }, { (type), (id) }, ##__VA_ARGS__ })
415 
417 spa_pod_builder_push_object(struct spa_pod_builder *builder, struct spa_pod_frame *frame,
418  uint32_t type, uint32_t id)
419 {
420  const struct spa_pod_object p =
421  SPA_POD_INIT_Object(sizeof(struct spa_pod_object_body), type, id);
422  uint32_t offset = builder->state.offset;
423  int res = spa_pod_builder_raw(builder, &p, sizeof(p));
424  spa_pod_builder_push(builder, frame, &p.pod, offset);
425  return res;
426 }
427 
428 #define SPA_POD_INIT_Prop(key,flags,size,type) \
429  ((struct spa_pod_prop){ (key), (flags), { (size), (type) } })
430 
432 spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
433 {
434  const struct { uint32_t key; uint32_t flags; } p = { key, flags };
435  return spa_pod_builder_raw(builder, &p, sizeof(p));
436 }
437 
438 #define SPA_POD_INIT_Sequence(size,unit) \
439  ((struct spa_pod_sequence){ { (size), SPA_TYPE_Sequence}, {(unit), 0 } })
440 
442 spa_pod_builder_push_sequence(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t unit)
443 {
444  const struct spa_pod_sequence p =
446  uint32_t offset = builder->state.offset;
447  int res = spa_pod_builder_raw(builder, &p, sizeof(p));
448  spa_pod_builder_push(builder, frame, &p.pod, offset);
449  return res;
450 }
451 
453 spa_pod_builder_control(struct spa_pod_builder *builder, uint32_t offset, uint32_t type)
454 {
455  const struct { uint32_t offset; uint32_t type; } p = { offset, type };
456  return spa_pod_builder_raw(builder, &p, sizeof(p));
457 }
458 
459 SPA_API_POD_BUILDER uint32_t spa_choice_from_id(char id)
460 {
461  switch (id) {
462  case 'r':
463  return SPA_CHOICE_Range;
464  case 's':
465  return SPA_CHOICE_Step;
466  case 'e':
467  return SPA_CHOICE_Enum;
468  case 'f':
469  return SPA_CHOICE_Flags;
470  case 'n':
471  default:
472  return SPA_CHOICE_None;
473  }
474 }
475 
476 #define SPA_POD_BUILDER_COLLECT(builder,type,args) \
477 do { \
478  switch (type) { \
479  case 'b': \
480  spa_pod_builder_bool(builder, !!va_arg(args, int)); \
481  break; \
482  case 'I': \
483  spa_pod_builder_id(builder, va_arg(args, uint32_t)); \
484  break; \
485  case 'i': \
486  spa_pod_builder_int(builder, va_arg(args, int)); \
487  break; \
488  case 'l': \
489  spa_pod_builder_long(builder, va_arg(args, int64_t)); \
490  break; \
491  case 'f': \
492  spa_pod_builder_float(builder, (float)va_arg(args, double)); \
493  break; \
494  case 'd': \
495  spa_pod_builder_double(builder, va_arg(args, double)); \
496  break; \
497  case 's': \
498  { \
499  char *strval = va_arg(args, char *); \
500  if (strval != NULL) { \
501  size_t len = strlen(strval); \
502  spa_pod_builder_string_len(builder, strval, len); \
503  } \
504  else \
505  spa_pod_builder_none(builder); \
506  break; \
507  } \
508  case 'S': \
509  { \
510  char *strval = va_arg(args, char *); \
511  size_t len = va_arg(args, int); \
512  spa_pod_builder_string_len(builder, strval, len); \
513  break; \
514  } \
515  case 'y': \
516  { \
517  void *ptr = va_arg(args, void *); \
518  int len = va_arg(args, int); \
519  spa_pod_builder_bytes(builder, ptr, len); \
520  break; \
521  } \
522  case 'R': \
523  { \
524  struct spa_rectangle *rectval = \
525  va_arg(args, struct spa_rectangle *); \
526  spa_pod_builder_rectangle(builder, \
527  rectval->width, rectval->height); \
528  break; \
529  } \
530  case 'F': \
531  { \
532  struct spa_fraction *fracval = \
533  va_arg(args, struct spa_fraction *); \
534  spa_pod_builder_fraction(builder, fracval->num, fracval->denom);\
535  break; \
536  } \
537  case 'a': \
538  { \
539  int child_size = va_arg(args, int); \
540  int child_type = va_arg(args, int); \
541  int n_elems = va_arg(args, int); \
542  void *elems = va_arg(args, void *); \
543  spa_pod_builder_array(builder, child_size, \
544  child_type, n_elems, elems); \
545  break; \
546  } \
547  case 'p': \
548  { \
549  int t = va_arg(args, uint32_t); \
550  spa_pod_builder_pointer(builder, t, va_arg(args, void *)); \
551  break; \
552  } \
553  case 'h': \
554  spa_pod_builder_fd(builder, va_arg(args, int)); \
555  break; \
556  case 'P': \
557  case 'O': \
558  case 'T': \
559  case 'V': \
560  { \
561  struct spa_pod *pod = va_arg(args, struct spa_pod *); \
562  if (pod == NULL) \
563  spa_pod_builder_none(builder); \
564  else \
565  spa_pod_builder_primitive(builder, pod); \
566  break; \
567  } \
568  } \
569 } while(false)
570 
572 spa_pod_builder_addv(struct spa_pod_builder *builder, va_list args)
573 {
574  int res = 0;
575  struct spa_pod_frame *frame = builder->state.frame;
576  uint32_t ftype = frame ? frame->pod.type : (uint32_t)SPA_TYPE_None;
577 
578  do {
579  const char *format;
580  int n_values = 1;
581  struct spa_pod_frame f;
582  bool choice;
583 
584  switch (ftype) {
585  case SPA_TYPE_Object:
586  {
587  uint32_t key = va_arg(args, uint32_t);
588  if (key == 0)
589  goto exit;
590  spa_pod_builder_prop(builder, key, 0);
591  break;
592  }
593  case SPA_TYPE_Sequence:
594  {
595  uint32_t offset = va_arg(args, uint32_t);
596  uint32_t type = va_arg(args, uint32_t);
597  if (type == 0)
598  goto exit;
599  spa_pod_builder_control(builder, offset, type);
601  }
602  default:
603  break;
604  }
605  if ((format = va_arg(args, const char *)) == NULL)
606  break;
607 
608  choice = *format == '?';
609  if (choice) {
610  uint32_t type = spa_choice_from_id(*++format);
611  if (*format != '\0')
612  format++;
613 
614  spa_pod_builder_push_choice(builder, &f, type, 0);
615 
616  n_values = va_arg(args, int);
617  }
618  while (n_values-- > 0)
619  SPA_POD_BUILDER_COLLECT(builder, *format, args);
620 
621  if (choice)
622  spa_pod_builder_pop(builder, &f);
623  } while (true);
624 
625  exit:
626  return res;
627 }
628 
630 {
631  int res;
632  va_list args;
633 
634  va_start(args, builder);
635  res = spa_pod_builder_addv(builder, args);
636  va_end(args);
637 
638  return res;
639 }
640 
641 #define spa_pod_builder_add_object(b,type,id,...) \
642 ({ \
643  struct spa_pod_builder *_b = (b); \
644  struct spa_pod_frame _f; \
645  spa_pod_builder_push_object(_b, &_f, type, id); \
646  spa_pod_builder_add(_b, ##__VA_ARGS__, 0); \
647  spa_pod_builder_pop(_b, &_f); \
648 })
649 
650 #define spa_pod_builder_add_struct(b,...) \
651 ({ \
652  struct spa_pod_builder *_b = (b); \
653  struct spa_pod_frame _f; \
654  spa_pod_builder_push_struct(_b, &_f); \
655  spa_pod_builder_add(_b, ##__VA_ARGS__, NULL); \
656  spa_pod_builder_pop(_b, &_f); \
657 })
658 
659 #define spa_pod_builder_add_sequence(b,unit,...) \
660 ({ \
661  struct spa_pod_builder *_b = (b); \
662  struct spa_pod_frame _f; \
663  spa_pod_builder_push_sequence(_b, &_f, unit); \
664  spa_pod_builder_add(_b, ##__VA_ARGS__, 0, 0); \
665  spa_pod_builder_pop(_b, &_f); \
666 })
667 
670 spa_pod_copy(const struct spa_pod *pod)
671 {
672  size_t size;
673  struct spa_pod *c;
674 
675  size = SPA_POD_SIZE(pod);
676  if ((c = (struct spa_pod *) malloc(size)) == NULL)
677  return NULL;
678  return (struct spa_pod *) memcpy(c, pod, size);
679 }
680 
685 #ifdef __cplusplus
686 } /* extern "C" */
687 #endif
688 
689 #endif /* SPA_POD_BUILDER_H */
uint32_t int int const char va_list args
Definition: core.h:434
va_end(args)
uint32_t int int const char int r
Definition: core.h:445
uint32_t int int res
Definition: core.h:433
va_start(args, message)
#define SPA_CALLBACKS_INIT(_funcs, _data)
Initialize the set of functions funcs as a spa_callbacks, together with _data.
Definition: hook.h:144
#define spa_callbacks_call_res(callbacks, type, res, method, vers,...)
Invoke method named method in the callbacks.
Definition: hook.h:217
#define SPA_POD_INIT_Double(val)
Definition: builder.h:282
SPA_API_POD_BUILDER int spa_pod_builder_int(struct spa_pod_builder *builder, int32_t val)
Definition: builder.h:257
SPA_API_POD_BUILDER int spa_pod_builder_long(struct spa_pod_builder *builder, int64_t val)
Definition: builder.h:266
#define SPA_POD_INIT_None()
Definition: builder.h:221
SPA_API_POD_BUILDER 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:416
SPA_API_POD_BUILDER int spa_pod_builder_pad(struct spa_pod_builder *builder, uint32_t size)
Definition: builder.h:162
#define SPA_POD_INIT(size, type)
Definition: builder.h:218
SPA_API_POD_BUILDER int spa_pod_builder_none(struct spa_pod_builder *builder)
Definition: builder.h:223
SPA_API_POD_BUILDER int spa_pod_builder_string(struct spa_pod_builder *builder, const char *str)
Definition: builder.h:315
SPA_API_POD_BUILDER int spa_pod_builder_id(struct spa_pod_builder *builder, uint32_t val)
Definition: builder.h:248
#define SPA_POD_BODY_CONST(pod)
Definition: pod.h:41
SPA_API_POD_BUILDER int spa_pod_builder_child(struct spa_pod_builder *builder, uint32_t size, uint32_t type)
Definition: builder.h:229
#define SPA_POD_INIT_Object(size, type, id,...)
Definition: builder.h:442
SPA_API_POD_BUILDER int spa_pod_builder_double(struct spa_pod_builder *builder, double val)
Definition: builder.h:284
SPA_API_POD_BUILDER int spa_pod_builder_fraction(struct spa_pod_builder *builder, uint32_t num, uint32_t denom)
Definition: builder.h:375
#define SPA_POD_BUILDER_FLAG_BODY
Definition: builder.h:45
SPA_API_POD_BUILDER int spa_pod_builder_fd(struct spa_pod_builder *builder, int64_t fd)
Definition: builder.h:355
SPA_API_POD_BUILDER int spa_pod_builder_pointer(struct spa_pod_builder *builder, uint32_t type, const void *val)
Definition: builder.h:346
#define SPA_POD_INIT_Sequence(size, unit)
Definition: builder.h:466
#define SPA_POD_INIT_Rectangle(val)
Definition: builder.h:362
SPA_API_POD_BUILDER void spa_pod_builder_get_state(struct spa_pod_builder *builder, struct spa_pod_builder_state *state)
Definition: builder.h:75
#define SPA_POD_INIT_Bool(val)
Definition: builder.h:237
#define SPA_POD_INIT_String(len)
Definition: builder.h:291
SPA_API_POD_BUILDER struct spa_pod * spa_pod_builder_deref(struct spa_pod_builder *builder, uint32_t offset)
Definition: builder.h:103
#define SPA_POD_BODY(pod)
Definition: pod.h:39
SPA_API_POD_BUILDER int spa_pod_builder_control(struct spa_pod_builder *builder, uint32_t offset, uint32_t type)
Definition: builder.h:481
#define SPA_POD_INIT_Id(val)
Definition: builder.h:246
SPA_API_POD_BUILDER int spa_pod_builder_push_struct(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:432
SPA_API_POD_BUILDER int spa_pod_builder_add(struct spa_pod_builder *builder,...)
Definition: builder.h:657
#define SPA_POD_BODY_SIZE(pod)
Definition: pod.h:26
#define SPA_POD_BUILDER_INIT(buffer, size)
Definition: builder.h:72
SPA_API_POD_BUILDER int spa_pod_builder_bool(struct spa_pod_builder *builder, bool val)
Definition: builder.h:239
SPA_API_POD_BUILDER int spa_pod_builder_rectangle(struct spa_pod_builder *builder, uint32_t width, uint32_t height)
Definition: builder.h:365
#define SPA_POD_INIT_Struct(size)
Definition: builder.h:429
SPA_API_POD_BUILDER 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:445
SPA_API_POD_BUILDER int spa_pod_builder_addv(struct spa_pod_builder *builder, va_list args)
Definition: builder.h:600
SPA_API_POD_BUILDER void spa_pod_builder_init(struct spa_pod_builder *builder, void *data, uint32_t size)
Definition: builder.h:97
SPA_API_POD_BUILDER void spa_pod_builder_reset(struct spa_pod_builder *builder, struct spa_pod_builder_state *state)
Definition: builder.h:88
SPA_API_POD_BUILDER int spa_pod_builder_string_len(struct spa_pod_builder *builder, const char *str, uint32_t len)
Definition: builder.h:306
SPA_API_POD_BUILDER int spa_pod_builder_bytes(struct spa_pod_builder *builder, const void *bytes, uint32_t len)
Definition: builder.h:325
SPA_API_POD_BUILDER void * spa_pod_builder_reserve_bytes(struct spa_pod_builder *builder, uint32_t len)
Definition: builder.h:334
#define SPA_POD_BUILDER_COLLECT(builder, type, args)
Definition: builder.h:504
SPA_API_POD_BUILDER 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:123
SPA_API_POD_BUILDER uint32_t spa_choice_from_id(char id)
Definition: builder.h:487
SPA_API_POD_BUILDER int spa_pod_builder_write_string(struct spa_pod_builder *builder, const char *str, uint32_t len)
Definition: builder.h:294
SPA_API_POD_BUILDER int spa_pod_builder_float(struct spa_pod_builder *builder, float val)
Definition: builder.h:275
SPA_API_POD_BUILDER int spa_pod_builder_push_array(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:382
#define SPA_POD_INIT_Int(val)
Definition: builder.h:255
#define SPA_POD_INIT_Float(val)
Definition: builder.h:273
SPA_API_POD_BUILDER int spa_pod_builder_raw(struct spa_pod_builder *builder, const void *data, uint32_t size)
Definition: builder.h:138
SPA_API_POD_BUILDER struct spa_pod * spa_pod_builder_frame(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:115
#define SPA_POD_INIT_Bytes(len)
Definition: builder.h:322
#define SPA_POD_INIT_Fd(fd)
Definition: builder.h:353
SPA_API_POD_BUILDER int spa_pod_builder_push_sequence(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t unit)
Definition: builder.h:470
SPA_API_POD_BUILDER int spa_pod_builder_primitive(struct spa_pod_builder *builder, const struct spa_pod *p)
Definition: builder.h:196
SPA_API_POD_BUILDER int spa_pod_builder_raw_padded(struct spa_pod_builder *builder, const void *data, uint32_t size)
Definition: builder.h:170
#define SPA_POD_INIT_Long(val)
Definition: builder.h:264
#define SPA_POD_INIT_Pointer(type, value)
Definition: builder.h:343
#define SPA_API_POD_BUILDER
Definition: builder.h:38
#define SPA_POD_INIT_Fraction(val)
Definition: builder.h:372
SPA_API_POD_BUILDER void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:178
#define SPA_POD_BUILDER_FLAG_FIRST
Definition: builder.h:47
#define SPA_POD_SIZE(pod)
Definition: pod.h:30
SPA_API_POD_BUILDER struct spa_pod * spa_pod_copy(const struct spa_pod *pod)
Copy a pod structure.
Definition: builder.h:698
SPA_API_POD_BUILDER void spa_pod_builder_set_callbacks(struct spa_pod_builder *builder, const struct spa_pod_builder_callbacks *callbacks, void *data)
Definition: builder.h:81
SPA_API_POD_BUILDER int spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
Definition: builder.h:460
SPA_API_POD_BUILDER 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:394
@ SPA_CHOICE_Step
range with step: default, min, max, step
Definition: pod.h:149
@ SPA_CHOICE_None
no choice, first value is current
Definition: pod.h:147
@ SPA_CHOICE_Flags
flags: default, possible flags,...
Definition: pod.h:151
@ SPA_CHOICE_Range
range: default, min, max
Definition: pod.h:148
@ SPA_CHOICE_Enum
list: default, alternative,...
Definition: pod.h:150
@ SPA_TYPE_Object
Definition: type.h:56
@ SPA_TYPE_None
Definition: type.h:42
@ SPA_TYPE_Sequence
Definition: type.h:57
@ SPA_TYPE_Choice
Definition: type.h:60
@ SPA_TYPE_Array
Definition: type.h:54
#define SPA_ROUND_UP_N(num, align)
Definition: defs.h:360
#define SPA_FRACTION(num, denom)
Definition: defs.h:136
#define SPA_FLAG_IS_SET(field, flag)
Definition: defs.h:90
#define SPA_FALLTHROUGH
SPA_FALLTHROUGH is an annotation to suppress compiler warnings about switch cases that fall through w...
Definition: defs.h:84
#define SPA_FLAG_CLEAR(field, flag)
Definition: defs.h:94
#define SPA_PTROFF(ptr_, offset_, type_)
Return the address (buffer + offset) as pointer of type.
Definition: defs.h:222
#define SPA_RECTANGLE(width, height)
Definition: defs.h:115
spa/utils/hook.h
spa/pod/iter.h
Callbacks, contains the structure with functions and the data passed to the functions.
Definition: hook.h:126
void * data
Definition: hook.h:128
Definition: pod.h:121
Definition: pod.h:126
struct spa_pod pod
Definition: pod.h:127
Definition: pod.h:51
struct spa_pod pod
Definition: pod.h:52
Definition: builder.h:55
int(* overflow)(void *data, uint32_t size)
Definition: builder.h:60
uint32_t version
Definition: builder.h:58
Definition: builder.h:42
uint32_t flags
Definition: builder.h:48
uint32_t offset
Definition: builder.h:43
struct spa_pod_frame * frame
Definition: builder.h:49
Definition: builder.h:63
uint32_t _padding
Definition: builder.h:66
struct spa_callbacks callbacks
Definition: builder.h:68
void * data
Definition: builder.h:64
struct spa_pod_builder_state state
Definition: builder.h:67
uint32_t size
Definition: builder.h:65
Definition: pod.h:90
Definition: pod.h:154
uint32_t type
type of choice, one of enum spa_choice_type
Definition: pod.h:155
uint32_t flags
extra flags
Definition: pod.h:156
Definition: pod.h:162
struct spa_pod pod
Definition: pod.h:163
Definition: pod.h:80
struct spa_pod pod
Definition: pod.h:81
Definition: pod.h:199
struct spa_pod pod
Definition: pod.h:200
Definition: pod.h:74
struct spa_pod pod
Definition: pod.h:75
Definition: pod.h:100
struct spa_pod pod
Definition: pod.h:101
Definition: iter.h:37
struct spa_pod pod
Definition: iter.h:38
uint32_t offset
Definition: iter.h:40
struct spa_pod_frame * parent
Definition: iter.h:39
uint32_t flags
Definition: iter.h:41
Definition: pod.h:57
struct spa_pod pod
Definition: pod.h:58
Definition: pod.h:63
struct spa_pod pod
Definition: pod.h:64
Definition: pod.h:69
struct spa_pod pod
Definition: pod.h:70
Definition: pod.h:177
Definition: pod.h:183
struct spa_pod pod
Definition: pod.h:184
Definition: pod.h:194
struct spa_pod pod
Definition: pod.h:195
Definition: pod.h:95
struct spa_pod pod
Definition: pod.h:96
Definition: pod.h:241
a sequence of timed controls
Definition: pod.h:248
struct spa_pod pod
Definition: pod.h:249
Definition: pod.h:85
Definition: pod.h:167
struct spa_pod pod
Definition: pod.h:168
Definition: pod.h:43
uint32_t type
Definition: pod.h:45
uint32_t size
Definition: pod.h:44
spa/pod/vararg.h