PipeWire  1.2.6
json-pod.h
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1 /* Simple Plugin API */
2 /* SPDX-FileCopyrightText: Copyright © 2022 Wim Taymans */
3 /* SPDX-License-Identifier: MIT */
4 
5 #ifndef SPA_UTILS_JSON_POD_H
6 #define SPA_UTILS_JSON_POD_H
7 
8 #ifdef __cplusplus
9 extern "C" {
10 #endif
11 
12 #include <spa/utils/string.h>
13 #include <spa/utils/json.h>
14 #include <spa/pod/pod.h>
15 #include <spa/pod/builder.h>
16 #include <spa/debug/types.h>
17 
27 static inline int spa_json_to_pod_part(struct spa_pod_builder *b, uint32_t flags, uint32_t id,
28  const struct spa_type_info *info, struct spa_json *iter, const char *value, int len)
29 {
30  const struct spa_type_info *ti;
31  char key[256];
32  struct spa_pod_frame f[1];
33  struct spa_json it[1];
34  int l, res;
35  const char *v;
36  uint32_t type;
37 
38  if (spa_json_is_object(value, len) && info != NULL) {
39  if ((ti = spa_debug_type_find(NULL, info->parent)) == NULL)
40  return -EINVAL;
41 
42  spa_pod_builder_push_object(b, &f[0], info->parent, id);
43 
44  spa_json_enter(iter, &it[0]);
45  while (spa_json_get_string(&it[0], key, sizeof(key)) > 0) {
46  const struct spa_type_info *pi;
47  if ((l = spa_json_next(&it[0], &v)) <= 0)
48  break;
49  if ((pi = spa_debug_type_find_short(ti->values, key)) != NULL)
50  type = pi->type;
51  else if (!spa_atou32(key, &type, 0))
52  continue;
54  if ((res = spa_json_to_pod_part(b, flags, id, pi, &it[0], v, l)) < 0)
55  return res;
56  }
57  if (l < 0)
58  return l;
59  spa_pod_builder_pop(b, &f[0]);
60  }
61  else if (spa_json_is_array(value, len)) {
62  if (info == NULL || info->parent == SPA_TYPE_Struct) {
64  } else {
66  info = info->values;
67  }
68  spa_json_enter(iter, &it[0]);
69  while ((l = spa_json_next(&it[0], &v)) > 0)
70  if ((res = spa_json_to_pod_part(b, flags, id, info, &it[0], v, l)) < 0)
71  return res;
72  if (l < 0)
73  return l;
74  spa_pod_builder_pop(b, &f[0]);
75  }
76  else if (spa_json_is_float(value, len)) {
77  float val = 0.0f;
78  spa_json_parse_float(value, len, &val);
79  switch (info ? info->parent : (uint32_t)SPA_TYPE_Struct) {
80  case SPA_TYPE_Bool:
81  spa_pod_builder_bool(b, val >= 0.5f);
82  break;
83  case SPA_TYPE_Id:
84  spa_pod_builder_id(b, (uint32_t)val);
85  break;
86  case SPA_TYPE_Int:
87  spa_pod_builder_int(b, (int32_t)val);
88  break;
89  case SPA_TYPE_Long:
90  spa_pod_builder_long(b, (int64_t)val);
91  break;
92  case SPA_TYPE_Struct:
93  if (spa_json_is_int(value, len))
94  spa_pod_builder_int(b, (int32_t)val);
95  else
96  spa_pod_builder_float(b, val);
97  break;
98  case SPA_TYPE_Float:
99  spa_pod_builder_float(b, val);
100  break;
101  case SPA_TYPE_Double:
102  spa_pod_builder_double(b, val);
103  break;
104  default:
106  break;
107  }
108  }
109  else if (spa_json_is_bool(value, len)) {
110  bool val = false;
111  spa_json_parse_bool(value, len, &val);
112  spa_pod_builder_bool(b, val);
113  }
114  else if (spa_json_is_null(value, len)) {
116  }
117  else {
118  char *val = (char*)alloca(len+1);
119  spa_json_parse_stringn(value, len, val, len+1);
120  switch (info ? info->parent : (uint32_t)SPA_TYPE_Struct) {
121  case SPA_TYPE_Id:
122  if ((ti = spa_debug_type_find_short(info->values, val)) != NULL)
123  type = ti->type;
124  else if (!spa_atou32(val, &type, 0))
125  return -EINVAL;
127  break;
128  case SPA_TYPE_Struct:
129  case SPA_TYPE_String:
130  spa_pod_builder_string(b, val);
131  break;
132  default:
134  break;
135  }
136  }
137  return 0;
138 }
139 
140 static inline int spa_json_to_pod(struct spa_pod_builder *b, uint32_t flags,
141  const struct spa_type_info *info, const char *value, int len)
142 {
143  struct spa_json iter;
144  const char *val;
145 
146  spa_json_init(&iter, value, len);
147  if ((len = spa_json_next(&iter, &val)) <= 0)
148  return -EINVAL;
149 
150  return spa_json_to_pod_part(b, flags, info->type, info, &iter, val, len);
151 }
152 
157 #ifdef __cplusplus
158 } /* extern "C" */
159 #endif
160 
161 #endif /* SPA_UTILS_JSON_POD_H */
spa/pod/builder.h
static const struct spa_type_info * spa_debug_type_find(const struct spa_type_info *info, uint32_t type)
Definition: types.h:26
static const struct spa_type_info * spa_debug_type_find_short(const struct spa_type_info *info, const char *name)
Definition: types.h:84
static int spa_json_to_pod(struct spa_pod_builder *b, uint32_t flags, const struct spa_type_info *info, const char *value, int len)
Definition: json-pod.h:145
static int spa_json_to_pod_part(struct spa_pod_builder *b, uint32_t flags, uint32_t id, const struct spa_type_info *info, struct spa_json *iter, const char *value, int len)
Definition: json-pod.h:32
static bool spa_json_is_float(const char *val, int len)
Definition: json.h:452
static int spa_json_parse_float(const char *val, int len, float *result)
Definition: json.h:429
static int spa_json_parse_stringn(const char *val, int len, char *result, int maxlen)
Definition: json.h:566
static void spa_json_enter(struct spa_json *iter, struct spa_json *sub)
Definition: json.h:58
static int spa_json_parse_bool(const char *val, int len, bool *result)
Definition: json.h:524
static int spa_json_get_string(struct spa_json *iter, char *res, int maxlen)
Definition: json.h:634
static bool spa_json_is_bool(const char *val, int len)
Definition: json.h:519
static bool spa_json_is_array(const char *val, int len)
Definition: json.h:413
static bool spa_json_is_null(const char *val, int len)
Definition: json.h:423
static int spa_json_next(struct spa_json *iter, const char **value)
Get the next token.
Definition: json.h:68
static void spa_json_init(struct spa_json *iter, const char *data, size_t size)
Definition: json.h:51
static bool spa_json_is_int(const char *val, int len)
Definition: json.h:494
static int spa_json_is_object(const char *val, int len)
Definition: json.h:403
static int spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
Definition: builder.h:450
static int spa_pod_builder_string(struct spa_pod_builder *builder, const char *str)
Definition: builder.h:305
static int spa_pod_builder_float(struct spa_pod_builder *builder, float val)
Definition: builder.h:265
static void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:168
static int spa_pod_builder_double(struct spa_pod_builder *builder, double val)
Definition: builder.h:274
static int spa_pod_builder_id(struct spa_pod_builder *builder, uint32_t val)
Definition: builder.h:238
static int spa_pod_builder_none(struct spa_pod_builder *builder)
Definition: builder.h:213
static int spa_pod_builder_push_array(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:372
static int spa_pod_builder_push_struct(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:422
static int spa_pod_builder_bool(struct spa_pod_builder *builder, bool val)
Definition: builder.h:229
static int spa_pod_builder_int(struct spa_pod_builder *builder, int32_t val)
Definition: builder.h:247
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:435
static int spa_pod_builder_long(struct spa_pod_builder *builder, int64_t val)
Definition: builder.h:256
static bool spa_atou32(const char *str, uint32_t *val, int base)
Convert str to an uint32_t with the given base and store the result in val.
Definition: string.h:128
@ SPA_TYPE_Int
Definition: type.h:34
@ SPA_TYPE_Long
Definition: type.h:35
@ SPA_TYPE_Bool
Definition: type.h:32
@ SPA_TYPE_Float
Definition: type.h:36
@ SPA_TYPE_Double
Definition: type.h:37
@ SPA_TYPE_Id
Definition: type.h:33
@ SPA_TYPE_String
Definition: type.h:38
@ SPA_TYPE_Struct
Definition: type.h:44
spa/utils/json.h
spa/pod/pod.h
spa/utils/string.h
Definition: json.h:38
Definition: builder.h:53
Definition: iter.h:27
Definition: type.h:143
uint32_t type
Definition: type.h:144
uint32_t parent
Definition: type.h:145
const struct spa_type_info * values
Definition: type.h:147
spa/debug/types.h