PipeWire: spa/pod/filter.h Source File

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filter.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_FILTER_H
6#define SPA_POD_FILTER_H
7
8#include <errno.h>
9#include <stdint.h>
10#include <stddef.h>
11#include <stdio.h>
12#include <string.h>
13
14#include <spa/param/props.h>
15#include <spa/pod/iter.h>
16#include <spa/pod/builder.h>
17#include <spa/pod/compare.h>
18#include <spa/pod/dynamic.h>
19
20#ifdef __cplusplus
21extern "C" {
22#endif
23
24#ifndef SPA_API_POD_FILTER
25 #ifdef SPA_API_IMPL
26 #define SPA_API_POD_FILTER SPA_API_IMPL
27 #else
28 #define SPA_API_POD_FILTER static inline
29 #endif
30#endif
31
36
37 SPA_API_POD_FILTER int spa_pod_filter_flags_value(struct spa_pod_builder *b,
38 uint32_t type, const void *r1, const void *r2, uint32_t size)
39{
40 switch (type) {
41 case SPA_TYPE_Int:
42 {
43 int32_t val;
44 if (size < sizeof(int32_t))
45 return -EINVAL;
46 val = (*(int32_t *) r1) & (*(int32_t *) r2);
47 if (val == 0)
48 return 0;
49 spa_pod_builder_int(b, val);
50 break;
51 }
52 case SPA_TYPE_Long:
53 {
54 int64_t val;
55 if (size < sizeof(int64_t))
56 return -EINVAL;
57 val = (*(int64_t *) r1) & (*(int64_t *) r2);
58 if (val == 0)
59 return 0;
60 spa_pod_builder_long(b, val);
61 break;
62 }
63 default:
64 return -ENOTSUP;
65 }
66 return 1;
67}
68
69 SPA_API_POD_FILTER int
70 spa_pod_filter_prop(struct spa_pod_builder *b,
71 const struct spa_pod_prop *p1,
72 const struct spa_pod_prop *p2)
73{
74 const struct spa_pod *v1, *v2;
75 struct spa_pod_choice *nc, dummy;
76 uint32_t j, k, nalt1, nalt2, nc_offs;
77 void *alt1, *alt2, *a1, *a2;
78 uint32_t type, size, p1c, p2c;
79 struct spa_pod_frame f;
80 int res, n_copied = 0;
81
82 v1 = spa_pod_get_values(&p1->value, &nalt1, &p1c);
83 v2 = spa_pod_get_values(&p2->value, &nalt2, &p2c);
84
85 /* empty/invalid choices */
86 if (nalt1 < 1 || nalt2 < 1)
87 return -EINVAL;
88
89 alt1 = SPA_POD_BODY(v1);
90 alt2 = SPA_POD_BODY(v2);
91
92 type = v1->type;
93 size = v1->size;
94
95 /* incompatible property types */
96 if (type != v2->type || size != v2->size || p1->key != p2->key)
97 return -EINVAL;
98
99 /* start with copying the property */
100 spa_pod_builder_prop(b, p1->key, p1->flags & p2->flags);
101 spa_pod_builder_push_choice(b, &f, SPA_CHOICE_None, 0);
102 spa_zero(dummy);
103
104 nc_offs = f.offset;
105
106 /* start with an empty child and we will select a good default
107 * below */
108 spa_pod_builder_child(b, size, type);
109
110 /* we should prefer alt2 values but only if they are within the
111 * range. Swap the order otherwise. */
112 if (!spa_pod_compare_is_valid_choice(type, size, alt2, alt2, nalt2, p2c)) {
113 SPA_SWAP(alt2, alt1);
114 SPA_SWAP(nalt2, nalt1);
115 SPA_SWAP(p2c, p1c);
116 }
117
118 if ((p1c == SPA_CHOICE_None && p2c == SPA_CHOICE_None) ||
119 (p1c == SPA_CHOICE_None && p2c == SPA_CHOICE_Enum) ||
120 (p1c == SPA_CHOICE_Enum && p2c == SPA_CHOICE_None) ||
121 (p1c == SPA_CHOICE_Enum && p2c == SPA_CHOICE_Enum)) {
122 /* copy all equal values. Start with alt2 so that they are prefered. */
123 for (j = 0, a2 = alt2; j < nalt2; j++, a2 = SPA_PTROFF(a2, size, void)) {
124 for (k = 0, a1 = alt1; k < nalt1; k++, a1 = SPA_PTROFF(a1,size,void)) {
125 if (spa_pod_compare_value(type, a1, a2, size) == 0) {
126 if (n_copied++ == 0)
127 spa_pod_builder_raw(b, a1, size);
128 spa_pod_builder_raw(b, a1, size);
129 }
130 }
131 }
132 }
133 else if ((p1c == SPA_CHOICE_None && p2c == SPA_CHOICE_Range) ||
134 (p1c == SPA_CHOICE_Enum && p2c == SPA_CHOICE_Range) ||
135 (p1c == SPA_CHOICE_None && p2c == SPA_CHOICE_Step) ||
136 (p1c == SPA_CHOICE_Enum && p2c == SPA_CHOICE_Step)) {
137 void *min = SPA_PTROFF(alt2,size,void);
138 void *max = SPA_PTROFF(min,size,void);
139 void *step = p2c == SPA_CHOICE_Step ? SPA_PTROFF(max,size,void) : NULL;
140 bool found_def = false;
141
142 /* we should prefer the alt2 range default value but only if valid */
143 if (spa_pod_compare_value(type, alt2, min, size) >= 0 &&
144 spa_pod_compare_value(type, alt2, max, size) <= 0) {
145 for (j = 0, a1 = alt1; j < nalt1; j++, a1 = SPA_PTROFF(a1,size,void)) {
146 if (spa_pod_compare_value(type, a1, alt2, size) == 0) {
147 /* it is in the enum, use as default then */
148 spa_pod_builder_raw(b, a1, size);
149 found_def = true;
150 break;
151 }
152 }
153 }
154 /* copy all values inside the range */
155 for (j = 0, a1 = alt1; j < nalt1; j++, a1 = SPA_PTROFF(a1,size,void)) {
156 if ((res = spa_pod_compare_is_in_range(type, a1, min, max, step, size)) < 0)
157 return res;
158 if (res == 0)
159 continue;
160 if (n_copied++ == 0 && !found_def)
161 spa_pod_builder_raw(b, a1, size);
162 spa_pod_builder_raw(b, a1, size);
163 }
164 }
165 else if ((p1c == SPA_CHOICE_Range && p2c == SPA_CHOICE_None) ||
166 (p1c == SPA_CHOICE_Range && p2c == SPA_CHOICE_Enum) ||
167 (p1c == SPA_CHOICE_Step && p2c == SPA_CHOICE_None) ||
168 (p1c == SPA_CHOICE_Step && p2c == SPA_CHOICE_Enum)) {
169 void *min = SPA_PTROFF(alt1,size,void);
170 void *max = SPA_PTROFF(min,size,void);
171 void *step = p1c == SPA_CHOICE_Step ? SPA_PTROFF(max,size,void) : NULL;
172
173 /* copy all values inside the range, this will automatically prefer
174 * a valid alt2 value */
175 for (j = 0, a2 = alt2; j < nalt2; j++, a2 = SPA_PTROFF(a2,size,void)) {
176 if ((res = spa_pod_compare_is_in_range(type, a2, min, max, step, size)) < 0)
177 return res;
178 if (res == 0)
179 continue;
180 if (n_copied++ == 0)
181 spa_pod_builder_raw(b, a2, size);
182 spa_pod_builder_raw(b, a2, size);
183 }
184 }
185 else if ((p1c == SPA_CHOICE_Range && p2c == SPA_CHOICE_Range) ||
186 (p1c == SPA_CHOICE_Range && p2c == SPA_CHOICE_Step) ||
187 (p1c == SPA_CHOICE_Step && p2c == SPA_CHOICE_Range) ||
188 (p1c == SPA_CHOICE_Step && p2c == SPA_CHOICE_Step)) {
189 void *min1 = SPA_PTROFF(alt1,size,void);
190 void *max1 = SPA_PTROFF(min1,size,void);
191 void *min2 = SPA_PTROFF(alt2,size,void);
192 void *max2 = SPA_PTROFF(min2,size,void);
193
194 /* max of min */
195 if (spa_pod_compare_value(type, min1, min2, size) < 0)
196 min1 = min2;
197 /* min of max */
198 if (spa_pod_compare_value(type, max2, max1, size) < 0)
199 max1 = max2;
200
201 /* reject impossible range */
202 if (spa_pod_compare_value(type, max1, min1, size) < 0)
203 return -EINVAL;
204
205 /* prefer alt2 if in new range */
206 a1 = alt2;
207 if ((res = spa_pod_compare_is_in_range(type, a1, min1, max1, NULL, size)) < 0)
208 return res;
209 if (res == 0) {
210 /* try alt1 otherwise */
211 a1 = alt1;
212 if ((res = spa_pod_compare_is_in_range(type, a1, min1, max1, NULL, size)) < 0)
213 return res;
214 /* fall back to new min value then */
215 if (res == 0)
216 a1 = min1;
217 }
218
219 spa_pod_builder_raw(b, a1, size);
220 spa_pod_builder_raw(b, min1, size);
221 spa_pod_builder_raw(b, max1, size);
222 nc = (struct spa_pod_choice*)spa_pod_builder_deref_fallback(b, nc_offs, &dummy.pod);
223 nc->body.type = SPA_CHOICE_Range;
224 }
225 else if ((p1c == SPA_CHOICE_None && p2c == SPA_CHOICE_Flags) ||
226 (p1c == SPA_CHOICE_Flags && p2c == SPA_CHOICE_None) ||
227 (p1c == SPA_CHOICE_Flags && p2c == SPA_CHOICE_Flags)) {
228 if (spa_pod_filter_flags_value(b, type, alt1, alt2, size) != 1)
229 return -EINVAL;
230 nc = (struct spa_pod_choice*)spa_pod_builder_deref_fallback(b, nc_offs, &dummy.pod);
231 nc->body.type = SPA_CHOICE_Flags;
232 }
233 else if (p1c == SPA_CHOICE_Range && p2c == SPA_CHOICE_Flags)
234 return -ENOTSUP;
235 else if (p1c == SPA_CHOICE_Enum && p2c == SPA_CHOICE_Flags)
236 return -ENOTSUP;
237 else if (p1c == SPA_CHOICE_Step && p2c == SPA_CHOICE_Flags)
238 return -ENOTSUP;
239 else if (p1c == SPA_CHOICE_Flags && p2c == SPA_CHOICE_Range)
240 return -ENOTSUP;
241 else if (p1c == SPA_CHOICE_Flags && p2c == SPA_CHOICE_Step)
242 return -ENOTSUP;
243 else if (p1c == SPA_CHOICE_Flags && p2c == SPA_CHOICE_Enum)
244 return -ENOTSUP;
245
246 nc = (struct spa_pod_choice*)spa_pod_builder_deref_fallback(b, nc_offs, &dummy.pod);
247 if (nc->body.type == SPA_CHOICE_None) {
248 if (n_copied == 0) {
249 return -EINVAL;
250 } else if (n_copied == 1) {
251 /* we always copy the default value twice, so remove it
252 * again when it was the only one added */
253 spa_pod_builder_remove(b, size);
254 } else if (n_copied > 1) {
255 nc->body.type = SPA_CHOICE_Enum;
256 }
257 }
258 spa_pod_builder_pop(b, &f);
259
260 return 0;
261}
262
263 SPA_API_POD_FILTER int spa_pod_filter_part(struct spa_pod_builder *b,
264 const struct spa_pod *pod, uint32_t pod_size,
265 const struct spa_pod *filter, uint32_t filter_size)
266{
267 const struct spa_pod *pp, *pf;
268 int res = 0;
269
270 pf = filter;
271
272 SPA_POD_FOREACH(pod, pod_size, pp) {
273 bool do_copy = false, do_advance = false;
274 uint32_t filter_offset = 0;
275 struct spa_pod_frame f;
276
277 switch (pp->type) {
278 case SPA_TYPE_Object:
279 if (pf != NULL) {
280 struct spa_pod_object *op = (struct spa_pod_object *) pp;
281 struct spa_pod_object *of = (struct spa_pod_object *) pf;
282 const struct spa_pod_prop *p1, *p2;
283
284 if (pf->type != pp->type)
285 return -EINVAL;
286
287 spa_pod_builder_push_object(b, &f, op->body.type, op->body.id);
288 p2 = NULL;
289 SPA_POD_OBJECT_FOREACH(op, p1) {
290 p2 = spa_pod_object_find_prop(of, p2, p1->key);
291 if (p2 != NULL)
292 res = spa_pod_filter_prop(b, p1, p2);
293 else if (SPA_FLAG_IS_SET(p1->flags, SPA_POD_PROP_FLAG_MANDATORY))
294 res = -EINVAL;
295 else if (!SPA_FLAG_IS_SET(p1->flags, SPA_POD_PROP_FLAG_DROP))
296 spa_pod_builder_raw_padded(b, p1, SPA_POD_PROP_SIZE(p1));
297 if (res < 0)
298 break;
299 }
300 if (res >= 0) {
301 p1 = NULL;
302 SPA_POD_OBJECT_FOREACH(of, p2) {
303 p1 = spa_pod_object_find_prop(op, p1, p2->key);
304 if (p1 != NULL)
305 continue;
306 if (SPA_FLAG_IS_SET(p2->flags, SPA_POD_PROP_FLAG_MANDATORY))
307 res = -EINVAL;
308 else if (!SPA_FLAG_IS_SET(p2->flags, SPA_POD_PROP_FLAG_DROP))
309 spa_pod_builder_raw_padded(b, p2, SPA_POD_PROP_SIZE(p2));
310 if (res < 0)
311 break;
312 }
313 }
314 spa_pod_builder_pop(b, &f);
315 do_advance = true;
316 }
317 else
318 do_copy = true;
319 break;
320
321 case SPA_TYPE_Struct:
322 if (pf != NULL) {
323 if (pf->type != pp->type)
324 return -EINVAL;
325
326 filter_offset = sizeof(struct spa_pod_struct);
327 spa_pod_builder_push_struct(b, &f);
328 res = spa_pod_filter_part(b,
329 SPA_PTROFF(pp,filter_offset,const struct spa_pod),
330 SPA_POD_SIZE(pp) - filter_offset,
331 SPA_PTROFF(pf,filter_offset,const struct spa_pod),
332 SPA_POD_SIZE(pf) - filter_offset);
333 spa_pod_builder_pop(b, &f);
334 do_advance = true;
335 }
336 else
337 do_copy = true;
338 break;
339
340 default:
341 if (pf != NULL) {
342 if (spa_pod_memcmp(pp, pf) != 0)
343 return -EINVAL;
344 do_advance = true;
345 }
346 do_copy = true;
347 break;
348 }
349 if (do_copy)
350 spa_pod_builder_raw_padded(b, pp, SPA_POD_SIZE(pp));
351 if (do_advance) {
352 pf = (const struct spa_pod*)spa_pod_next(pf);
353 if (!spa_pod_is_inside(filter, filter_size, pf))
354 pf = NULL;
355 }
356 if (res < 0)
357 break;
358 }
359 return res;
360}
361
362 SPA_API_POD_FILTER int
363 spa_pod_filter(struct spa_pod_builder *b,
364 struct spa_pod **result,
365 const struct spa_pod *pod,
366 const struct spa_pod *filter)
367{
368 int res;
369 struct spa_pod_builder_state state;
370
371 spa_return_val_if_fail(pod != NULL, -EINVAL);
372 spa_return_val_if_fail(b != NULL, -EINVAL);
373
374 spa_pod_builder_get_state(b, &state);
375 if (filter == NULL) {
376 res = spa_pod_builder_raw_padded(b, pod, SPA_POD_SIZE(pod));
377 } else {
378 struct spa_pod_dynamic_builder db;
379 spa_pod_dynamic_builder_continue(&db, b);
380 res = spa_pod_filter_part(&db.b, pod, SPA_POD_SIZE(pod), filter, SPA_POD_SIZE(filter));
381 if (res >= 0)
382 res = spa_pod_builder_raw_padded(b, db.b.data, db.b.state.offset);
383 spa_pod_dynamic_builder_clean(&db);
384 }
385 if (res >= 0 && result) {
386 *result = (struct spa_pod*)spa_pod_builder_deref(b, state.offset);
387 if (*result == NULL)
388 res = -ENOSPC;
389 }
390 return res;
391}
392
393 SPA_API_POD_FILTER int spa_pod_filter_object_make(struct spa_pod_object *pod)
394{
395 struct spa_pod_prop *res;
396 int count = 0;
397
398 SPA_POD_OBJECT_FOREACH(pod, res) {
399 if (spa_pod_is_choice(&res->value) &&
400 !SPA_FLAG_IS_SET(res->flags, SPA_POD_PROP_FLAG_DONT_FIXATE)) {
401 uint32_t nvals, choice;
402 struct spa_pod *v = spa_pod_get_values(&res->value, &nvals, &choice);
403 const void *vals = SPA_POD_BODY(v);
404
405 if (nvals < 1)
406 continue;
407
408 if (spa_pod_compare_is_valid_choice(v->type, v->size,
409 vals, vals, nvals, choice)) {
410 ((struct spa_pod_choice*)&res->value)->body.type = SPA_CHOICE_None;
411 count++;
412 }
413 }
414 }
415 return count;
416}
417 SPA_API_POD_FILTER int spa_pod_filter_make(struct spa_pod *pod)
418{
419 if (!spa_pod_is_object(pod))
420 return -EINVAL;
421 return spa_pod_filter_object_make((struct spa_pod_object *)pod);
422}
424
424 * \}
425 */
426
427#ifdef __cplusplus
428} /* extern "C" */
429#endif
430
431#endif /* SPA_POD_FILTER_H */
builder.h
spa/pod/builder.h
compare.h
spa/pod/compare.h
res
uint32_t int int res
Definition core.h:433
spa_pod_builder_pop
SPA_API_POD_BUILDER void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition builder.h:213
spa_pod_builder_int
SPA_API_POD_BUILDER int spa_pod_builder_int(struct spa_pod_builder *builder, int32_t val)
Definition builder.h:296
spa_pod_builder_long
SPA_API_POD_BUILDER int spa_pod_builder_long(struct spa_pod_builder *builder, int64_t val)
Definition builder.h:305
spa_pod_builder_push_choice
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:446
spa_pod_compare_is_in_range
SPA_API_POD_COMPARE int spa_pod_compare_is_in_range(uint32_t type, const void *v, const void *min, const void *max, const void *step, uint32_t size 1)
Definition compare.h:225
spa_pod_builder_child
SPA_API_POD_BUILDER int spa_pod_builder_child(struct spa_pod_builder *builder, uint32_t size, uint32_t type)
Definition builder.h:268
spa_pod_get_values
SPA_API_POD_ITER struct spa_pod * spa_pod_get_values(const struct spa_pod *pod, uint32_t *n_vals, uint32_t *choice)
Definition iter.h:229
spa_pod_filter_flags_value
SPA_API_POD_FILTER int spa_pod_filter_flags_value(struct spa_pod_builder *b, uint32_t type, const void *r1, const void *r2, uint32_t size)
Definition filter.h:44
SPA_POD_PROP_FLAG_MANDATORY
#define SPA_POD_PROP_FLAG_MANDATORY
is mandatory, when filtering, both sides need this property or filtering fails.
Definition pod.h:241
spa_pod_compare_is_valid_choice
SPA_API_POD_COMPARE int spa_pod_compare_is_valid_choice(uint32_t type, uint32_t size, const void *val, const void *vals, uint32_t n_vals, uint32_t choice)
Definition compare.h:236
spa_pod_filter_prop
SPA_API_POD_FILTER int spa_pod_filter_prop(struct spa_pod_builder *b, const struct spa_pod_prop *p1, const struct spa_pod_prop *p2)
Definition filter.h:77
spa_pod_builder_get_state
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
SPA_POD_PROP_FLAG_DROP
#define SPA_POD_PROP_FLAG_DROP
drop property, when filtering, both sides need the property or it will be dropped.
Definition pod.h:246
spa_pod_object_find_prop
SPA_API_POD_ITER const struct spa_pod_prop * spa_pod_object_find_prop(const struct spa_pod_object *pod, const struct spa_pod_prop *start, uint32_t key)
Definition iter.h:254
spa_pod_compare_value
SPA_API_POD_COMPARE int spa_pod_compare_value(uint32_t type, const void *r1, const void *r2, uint32_t size)
Definition compare.h:43
SPA_POD_OBJECT_FOREACH
#define SPA_POD_OBJECT_FOREACH(obj, iter)
Definition iter.h:118
SPA_POD_BODY
#define SPA_POD_BODY(pod)
Definition pod.h:44
spa_pod_is_object
SPA_API_POD_BODY int spa_pod_is_object(const struct spa_pod *pod)
Definition body.h:428
spa_pod_next
SPA_API_POD_ITER void * spa_pod_next(const void *iter)
Definition iter.h:46
spa_pod_builder_push_struct
SPA_API_POD_BUILDER int spa_pod_builder_push_struct(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition builder.h:462
spa_pod_filter_make
SPA_API_POD_FILTER int spa_pod_filter_make(struct spa_pod *pod)
Definition filter.h:424
spa_pod_builder_deref
SPA_API_POD_BUILDER struct spa_pod * spa_pod_builder_deref(struct spa_pod_builder *builder, uint32_t offset)
Definition builder.h:121
spa_pod_builder_push_object
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:475
SPA_POD_PROP_FLAG_DONT_FIXATE
#define SPA_POD_PROP_FLAG_DONT_FIXATE
choices need no fixation
Definition pod.h:244
spa_pod_builder_remove
SPA_API_POD_BUILDER void spa_pod_builder_remove(struct spa_pod_builder *builder, uint32_t size)
Definition builder.h:187
spa_pod_filter
SPA_API_POD_FILTER int spa_pod_filter(struct spa_pod_builder *b, struct spa_pod **result, const struct spa_pod *pod, const struct spa_pod *filter)
Definition filter.h:370
SPA_POD_FOREACH
#define SPA_POD_FOREACH(pod, size, iter)
Definition iter.h:105
SPA_POD_PROP_SIZE
#define SPA_POD_PROP_SIZE(prop)
Definition pod.h:224
spa_pod_is_inside
SPA_API_POD_ITER bool spa_pod_is_inside(const void *pod, uint32_t size, const void *iter)
Definition iter.h:38
spa_pod_builder_raw
SPA_API_POD_BUILDER int spa_pod_builder_raw(struct spa_pod_builder *builder, const void *data, uint32_t size)
Definition builder.h:150
spa_pod_filter_object_make
SPA_API_POD_FILTER int spa_pod_filter_object_make(struct spa_pod_object *pod)
Definition filter.h:400
spa_pod_builder_raw_padded
SPA_API_POD_BUILDER int spa_pod_builder_raw_padded(struct spa_pod_builder *builder, const void *data, uint32_t size)
Definition builder.h:205
spa_pod_filter_part
SPA_API_POD_FILTER int spa_pod_filter_part(struct spa_pod_builder *b, const struct spa_pod *pod, uint32_t pod_size, const struct spa_pod *filter, uint32_t filter_size)
Definition filter.h:270
SPA_POD_SIZE
#define SPA_POD_SIZE(pod)
Definition pod.h:35
spa_pod_memcmp
SPA_API_POD_COMPARE int spa_pod_memcmp(const struct spa_pod *a, const struct spa_pod *b)
Definition compare.h:90
spa_pod_is_choice
SPA_API_POD_BODY int spa_pod_is_choice(const struct spa_pod *pod)
Definition body.h:389
spa_pod_builder_prop
SPA_API_POD_BUILDER int spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
Definition builder.h:490
spa_pod_builder_deref_fallback
SPA_API_POD_BUILDER struct spa_pod * spa_pod_builder_deref_fallback(struct spa_pod_builder *builder, uint32_t offset, struct spa_pod *fallback)
Definition builder.h:108
SPA_CHOICE_Step
@ SPA_CHOICE_Step
range with step: default, min, max, step
Definition pod.h:163
SPA_CHOICE_None
@ SPA_CHOICE_None
no choice, first value is current
Definition pod.h:161
SPA_CHOICE_Flags
@ SPA_CHOICE_Flags
flags: first value is flags
Definition pod.h:165
SPA_CHOICE_Range
@ SPA_CHOICE_Range
range: default, min, max
Definition pod.h:162
SPA_CHOICE_Enum
@ SPA_CHOICE_Enum
list: default, alternative,...
Definition pod.h:164
SPA_TYPE_Int
@ SPA_TYPE_Int
Definition type.h:45
SPA_TYPE_Long
@ SPA_TYPE_Long
Definition type.h:46
SPA_TYPE_Object
@ SPA_TYPE_Object
Definition type.h:56
SPA_TYPE_Struct
@ SPA_TYPE_Struct
Definition type.h:55
spa_zero
#define spa_zero(x)
Definition defs.h:512
spa_return_val_if_fail
#define spa_return_val_if_fail(expr, val)
Definition defs.h:460
SPA_SWAP
#define SPA_SWAP(a, b)
Definition defs.h:195
SPA_FLAG_IS_SET
#define SPA_FLAG_IS_SET(field, flag)
Definition defs.h:90
SPA_PTROFF
#define SPA_PTROFF(ptr_, offset_, type_)
Return the address (buffer + offset) as pointer of type.
Definition defs.h:222
iter.h
spa/pod/iter.h
props.h
SPA_API_POD_FILTER
#define SPA_API_POD_FILTER
Definition filter.h:35
string.h
spa/utils/string.h
spa_pod_builder_state
Definition builder.h:42
spa_pod_builder
Definition builder.h:63
spa_pod_builder::data
void * data
Definition builder.h:64
spa_pod_choice_body::type
uint32_t type
type of choice, one of enum spa_choice_type
Definition pod.h:169
spa_pod_choice
Definition pod.h:176
spa_pod_choice::body
struct spa_pod_choice_body body
Definition pod.h:178
spa_pod_choice::pod
struct spa_pod pod
Definition pod.h:177
spa_pod_dynamic_builder
Definition dynamic.h:29
spa_pod_dynamic_builder::b
struct spa_pod_builder b
Definition dynamic.h:30
spa_pod_frame
Definition body.h:38
spa_pod_object_body::type
uint32_t type
one of enum spa_type
Definition pod.h:197
spa_pod_object_body::id
uint32_t id
id of the object, depends on the object type
Definition pod.h:198
spa_pod_object
Definition pod.h:202
spa_pod_object::body
struct spa_pod_object_body body
Definition pod.h:204
spa_pod_prop
Definition pod.h:227
spa_pod_prop::key
uint32_t key
key of property, list of valid keys depends on the object type
Definition pod.h:228
spa_pod_prop::flags
uint32_t flags
flags for property
Definition pod.h:248
spa_pod_prop::value
struct spa_pod value
Definition pod.h:249
spa_pod_struct
Definition pod.h:186
spa_pod
Definition pod.h:57
spa_pod::type
uint32_t type
Definition pod.h:59
spa_pod::size
uint32_t size
Definition pod.h:58