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annotate DPF-Prymula-audioplugins/dpf/distrho/src/lv2/atom-util.h @ 7:bb29f1c89c99

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immposiblerush-0.230919-0_PKG
author prymula <prymula76@outlook.com>
date Thu, 01 Feb 2024 21:49:30 +0100
parents 84e66ea83026
children
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1 /*
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2 Copyright 2008-2015 David Robillard <http://drobilla.net>
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3
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4 Permission to use, copy, modify, and/or distribute this software for any
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5 purpose with or without fee is hereby granted, provided that the above
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6 copyright notice and this permission notice appear in all copies.
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7
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8 THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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9 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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10 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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11 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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12 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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13 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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14 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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15 */
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16
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17 /**
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18 @file util.h Helper functions for the LV2 Atom extension.
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19
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20 Note these functions are all static inline, do not take their address.
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21
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22 This header is non-normative, it is provided for convenience.
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23 */
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24
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25 /**
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26 @defgroup util Utilities
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27 @ingroup atom
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28 @{
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29 */
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30
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31 #ifndef LV2_ATOM_UTIL_H
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32 #define LV2_ATOM_UTIL_H
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33
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34 #include <stdarg.h>
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35 #include <stdint.h>
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36 #include <string.h>
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37
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38 #include "atom.h"
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39
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40 #ifdef __cplusplus
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41 extern "C" {
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42 #else
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43 # include <stdbool.h>
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44 #endif
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45
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46 /** Pad a size to 64 bits. */
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47 static inline uint32_t
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48 lv2_atom_pad_size(uint32_t size)
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49 {
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50 return (size + 7U) & (~7U);
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51 }
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52
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53 /** Return the total size of `atom`, including the header. */
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54 static inline uint32_t
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55 lv2_atom_total_size(const LV2_Atom* atom)
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56 {
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57 return (uint32_t)sizeof(LV2_Atom) + atom->size;
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58 }
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59
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60 /** Return true iff `atom` is null. */
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61 static inline bool
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62 lv2_atom_is_null(const LV2_Atom* atom)
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63 {
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64 return !atom || (atom->type == 0 && atom->size == 0);
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65 }
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66
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67 /** Return true iff `a` is equal to `b`. */
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68 static inline bool
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69 lv2_atom_equals(const LV2_Atom* a, const LV2_Atom* b)
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70 {
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71 return (a == b) || ((a->type == b->type) &&
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72 (a->size == b->size) &&
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73 !memcmp(a + 1, b + 1, a->size));
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74 }
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75
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76 /**
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77 @name Sequence Iterator
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78 @{
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79 */
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80
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81 /** Get an iterator pointing to the first event in a Sequence body. */
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82 static inline const LV2_Atom_Event*
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83 lv2_atom_sequence_begin(const LV2_Atom_Sequence_Body* body)
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84 {
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85 return (const LV2_Atom_Event*)(body + 1);
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86 }
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87
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88 /** Get an iterator pointing to the end of a Sequence body. */
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89 static inline const LV2_Atom_Event*
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90 lv2_atom_sequence_end(const LV2_Atom_Sequence_Body* body, uint32_t size)
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91 {
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92 return (const LV2_Atom_Event*)((const uint8_t*)body + lv2_atom_pad_size(size));
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93 }
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94
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95 /** Get an iterator pointing to the end of a Sequence body. */
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96 static inline LV2_Atom_Event*
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97 lv2_atom_sequence_end2(LV2_Atom_Sequence_Body* body, uint32_t size)
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98 {
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99 return (LV2_Atom_Event*)((uint8_t*)body + lv2_atom_pad_size(size));
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100 }
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101
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102 /** Return true iff `i` has reached the end of `body`. */
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103 static inline bool
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104 lv2_atom_sequence_is_end(const LV2_Atom_Sequence_Body* body,
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105 uint32_t size,
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106 const LV2_Atom_Event* i)
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107 {
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108 return (const uint8_t*)i >= ((const uint8_t*)body + size);
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109 }
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110
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111 /** Return an iterator to the element following `i`. */
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112 static inline const LV2_Atom_Event*
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113 lv2_atom_sequence_next(const LV2_Atom_Event* i)
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114 {
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115 return (const LV2_Atom_Event*)((const uint8_t*)i
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116 + sizeof(LV2_Atom_Event)
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117 + lv2_atom_pad_size(i->body.size));
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118 }
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119
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120 /**
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121 A macro for iterating over all events in a Sequence.
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122 @param seq The sequence to iterate over
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123 @param iter The name of the iterator
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124
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125 This macro is used similarly to a for loop (which it expands to), e.g.:
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126 @code
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127 LV2_ATOM_SEQUENCE_FOREACH(sequence, ev) {
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128 // Do something with ev (an LV2_Atom_Event*) here...
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129 }
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130 @endcode
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131 */
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132 #define LV2_ATOM_SEQUENCE_FOREACH(seq, iter) \
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133 for (const LV2_Atom_Event* iter = lv2_atom_sequence_begin(&(seq)->body); \
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134 !lv2_atom_sequence_is_end(&(seq)->body, (seq)->atom.size, (iter)); \
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135 iter = lv2_atom_sequence_next(iter))
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136
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137 /** Like LV2_ATOM_SEQUENCE_FOREACH but for a headerless sequence body. */
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138 #define LV2_ATOM_SEQUENCE_BODY_FOREACH(body, size, iter) \
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139 for (const LV2_Atom_Event* iter = lv2_atom_sequence_begin(body); \
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140 !lv2_atom_sequence_is_end(body, size, (iter)); \
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141 iter = lv2_atom_sequence_next(iter))
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142
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143 /**
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144 @}
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145 @name Sequence Utilities
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146 @{
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147 */
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148
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149 /**
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150 Clear all events from `sequence`.
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151
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152 This simply resets the size field, the other fields are left untouched.
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153 */
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154 static inline void
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155 lv2_atom_sequence_clear(LV2_Atom_Sequence* seq)
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156 {
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157 seq->atom.size = sizeof(LV2_Atom_Sequence_Body);
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158 }
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159
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160 /**
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161 Append an event at the end of `sequence`.
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162
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163 @param seq Sequence to append to.
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164 @param capacity Total capacity of the sequence atom
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165 (e.g. as set by the host for sequence output ports).
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166 @param event Event to write.
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167
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168 @return A pointer to the newly written event in `seq`,
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169 or NULL on failure (insufficient space).
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170 */
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171 static inline LV2_Atom_Event*
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172 lv2_atom_sequence_append_event(LV2_Atom_Sequence* seq,
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173 uint32_t capacity,
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174 const LV2_Atom_Event* event)
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175 {
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176 const uint32_t total_size = (uint32_t)sizeof(*event) + event->body.size;
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177 if (capacity - seq->atom.size < total_size) {
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178 return NULL;
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179 }
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180
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181 LV2_Atom_Event* e = lv2_atom_sequence_end2(&seq->body, seq->atom.size);
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182 memcpy(e, event, total_size);
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183
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184 seq->atom.size += lv2_atom_pad_size(total_size);
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185
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186 return e;
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187 }
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188
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189 /**
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190 @}
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191 @name Tuple Iterator
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192 @{
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193 */
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194
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195 /** Get an iterator pointing to the first element in `tup`. */
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196 static inline const LV2_Atom*
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197 lv2_atom_tuple_begin(const LV2_Atom_Tuple* tup)
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198 {
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199 return (const LV2_Atom*)(LV2_ATOM_BODY_CONST(tup));
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200 }
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201
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202 /** Return true iff `i` has reached the end of `body`. */
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203 static inline bool
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204 lv2_atom_tuple_is_end(const void* body, uint32_t size, const LV2_Atom* i)
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205 {
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206 return (const uint8_t*)i >= ((const uint8_t*)body + size);
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207 }
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208
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209 /** Return an iterator to the element following `i`. */
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210 static inline const LV2_Atom*
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211 lv2_atom_tuple_next(const LV2_Atom* i)
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212 {
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213 return (const LV2_Atom*)(
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214 (const uint8_t*)i + sizeof(LV2_Atom) + lv2_atom_pad_size(i->size));
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215 }
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216
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217 /**
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218 A macro for iterating over all properties of a Tuple.
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219 @param tuple The tuple to iterate over
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220 @param iter The name of the iterator
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221
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222 This macro is used similarly to a for loop (which it expands to), e.g.:
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223 @code
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224 LV2_ATOM_TUPLE_FOREACH(tuple, elem) {
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225 // Do something with elem (an LV2_Atom*) here...
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226 }
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227 @endcode
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228 */
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229 #define LV2_ATOM_TUPLE_FOREACH(tuple, iter) \
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230 for (const LV2_Atom* iter = lv2_atom_tuple_begin(tuple); \
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231 !lv2_atom_tuple_is_end(LV2_ATOM_BODY_CONST(tuple), (tuple)->atom.size, (iter)); \
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232 iter = lv2_atom_tuple_next(iter))
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233
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234 /** Like LV2_ATOM_TUPLE_FOREACH but for a headerless tuple body. */
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235 #define LV2_ATOM_TUPLE_BODY_FOREACH(body, size, iter) \
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236 for (const LV2_Atom* iter = (const LV2_Atom*)body; \
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237 !lv2_atom_tuple_is_end(body, size, (iter)); \
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diff changeset
238 iter = lv2_atom_tuple_next(iter))
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239
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240 /**
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241 @}
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242 @name Object Iterator
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243 @{
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244 */
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245
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246 /** Return a pointer to the first property in `body`. */
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247 static inline const LV2_Atom_Property_Body*
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248 lv2_atom_object_begin(const LV2_Atom_Object_Body* body)
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249 {
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250 return (const LV2_Atom_Property_Body*)(body + 1);
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251 }
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252
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253 /** Return true iff `i` has reached the end of `obj`. */
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254 static inline bool
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255 lv2_atom_object_is_end(const LV2_Atom_Object_Body* body,
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256 uint32_t size,
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257 const LV2_Atom_Property_Body* i)
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258 {
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259 return (const uint8_t*)i >= ((const uint8_t*)body + size);
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260 }
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261
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262 /** Return an iterator to the property following `i`. */
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263 static inline const LV2_Atom_Property_Body*
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264 lv2_atom_object_next(const LV2_Atom_Property_Body* i)
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265 {
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266 const LV2_Atom* const value = (const LV2_Atom*)(
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267 (const uint8_t*)i + 2 * sizeof(uint32_t));
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268 return (const LV2_Atom_Property_Body*)(
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269 (const uint8_t*)i + lv2_atom_pad_size(
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270 (uint32_t)sizeof(LV2_Atom_Property_Body) + value->size));
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271 }
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272
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273 /**
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274 A macro for iterating over all properties of an Object.
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275 @param obj The object to iterate over
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276 @param iter The name of the iterator
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277
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278 This macro is used similarly to a for loop (which it expands to), e.g.:
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279 @code
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280 LV2_ATOM_OBJECT_FOREACH(object, i) {
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281 // Do something with prop (an LV2_Atom_Property_Body*) here...
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282 }
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283 @endcode
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284 */
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285 #define LV2_ATOM_OBJECT_FOREACH(obj, iter) \
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286 for (const LV2_Atom_Property_Body* iter = lv2_atom_object_begin(&(obj)->body); \
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287 !lv2_atom_object_is_end(&(obj)->body, (obj)->atom.size, (iter)); \
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288 iter = lv2_atom_object_next(iter))
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289
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290 /** Like LV2_ATOM_OBJECT_FOREACH but for a headerless object body. */
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291 #define LV2_ATOM_OBJECT_BODY_FOREACH(body, size, iter) \
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292 for (const LV2_Atom_Property_Body* iter = lv2_atom_object_begin(body); \
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293 !lv2_atom_object_is_end(body, size, (iter)); \
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294 iter = lv2_atom_object_next(iter))
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295
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296 /**
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297 @}
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298 @name Object Query
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299 @{
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300 */
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301
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302 /** A single entry in an Object query. */
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303 typedef struct {
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304 uint32_t key; /**< Key to query (input set by user) */
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305 const LV2_Atom** value; /**< Found value (output set by query function) */
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306 } LV2_Atom_Object_Query;
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307
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308 static const LV2_Atom_Object_Query LV2_ATOM_OBJECT_QUERY_END = { 0, NULL };
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309
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310 /**
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311 Get an object's values for various keys.
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312
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313 The value pointer of each item in `query` will be set to the location of
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314 the corresponding value in `object`. Every value pointer in `query` MUST
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315 be initialised to NULL. This function reads `object` in a single linear
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316 sweep. By allocating `query` on the stack, objects can be "queried"
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317 quickly without allocating any memory. This function is realtime safe.
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318
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319 This function can only do "flat" queries, it is not smart enough to match
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320 variables in nested objects.
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321
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322 For example:
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323 @code
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324 const LV2_Atom* name = NULL;
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325 const LV2_Atom* age = NULL;
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326 LV2_Atom_Object_Query q[] = {
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327 { urids.eg_name, &name },
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328 { urids.eg_age, &age },
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329 LV2_ATOM_OBJECT_QUERY_END
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330 };
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331 lv2_atom_object_query(obj, q);
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332 // name and age are now set to the appropriate values in obj, or NULL.
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333 @endcode
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334 */
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335 static inline int
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336 lv2_atom_object_query(const LV2_Atom_Object* object,
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337 LV2_Atom_Object_Query* query)
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338 {
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339 int matches = 0;
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340 int n_queries = 0;
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341
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342 /* Count number of query keys so we can short-circuit when done */
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343 for (LV2_Atom_Object_Query* q = query; q->key; ++q) {
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344 ++n_queries;
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345 }
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346
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347 LV2_ATOM_OBJECT_FOREACH(object, prop) {
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348 for (LV2_Atom_Object_Query* q = query; q->key; ++q) {
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349 if (q->key == prop->key && !*q->value) {
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350 *q->value = &prop->value;
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351 if (++matches == n_queries) {
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352 return matches;
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353 }
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354 break;
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diff changeset
355 }
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diff changeset
356 }
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357 }
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358 return matches;
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diff changeset
359 }
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360
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diff changeset
361 /**
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362 Body only version of lv2_atom_object_get().
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363 */
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prymula <prymula76@outlook.com>
parents:
diff changeset
364 static inline int
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
365 lv2_atom_object_body_get(uint32_t size, const LV2_Atom_Object_Body* body, ...)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
366 {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
367 int matches = 0;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
368 int n_queries = 0;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
369
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
370 /* Count number of keys so we can short-circuit when done */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
371 va_list args;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
372 va_start(args, body);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
373 for (n_queries = 0; va_arg(args, uint32_t); ++n_queries) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
374 if (!va_arg(args, const LV2_Atom**)) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
375 va_end(args);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
376 return -1;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
377 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
378 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
379 va_end(args);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
380
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
381 LV2_ATOM_OBJECT_BODY_FOREACH(body, size, prop) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
382 va_start(args, body);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
383 for (int i = 0; i < n_queries; ++i) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
384 uint32_t qkey = va_arg(args, uint32_t);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
385 const LV2_Atom** qval = va_arg(args, const LV2_Atom**);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
386 if (qkey == prop->key && !*qval) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
387 *qval = &prop->value;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
388 if (++matches == n_queries) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
389 va_end(args);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
390 return matches;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
391 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
392 break;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
393 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
394 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
395 va_end(args);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
396 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
397 return matches;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
398 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
399
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
400 /**
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
401 Variable argument version of lv2_atom_object_query().
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
402
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
403 This is nicer-looking in code, but a bit more error-prone since it is not
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
404 type safe and the argument list must be terminated.
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
405
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
406 The arguments should be a series of uint32_t key and const LV2_Atom** value
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
407 pairs, terminated by a zero key. The value pointers MUST be initialized to
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
408 NULL. For example:
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
409
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
410 @code
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
411 const LV2_Atom* name = NULL;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
412 const LV2_Atom* age = NULL;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
413 lv2_atom_object_get(obj,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
414 uris.name_key, &name,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
415 uris.age_key, &age,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
416 0);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
417 @endcode
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
418 */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
419 static inline int
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
420 lv2_atom_object_get(const LV2_Atom_Object* object, ...)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
421 {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
422 int matches = 0;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
423 int n_queries = 0;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
424
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
425 /* Count number of keys so we can short-circuit when done */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
426 va_list args;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
427 va_start(args, object);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
428 for (n_queries = 0; va_arg(args, uint32_t); ++n_queries) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
429 if (!va_arg(args, const LV2_Atom**)) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
430 return -1;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
431 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
432 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
433 va_end(args);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
434
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
435 LV2_ATOM_OBJECT_FOREACH(object, prop) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
436 va_start(args, object);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
437 for (int i = 0; i < n_queries; ++i) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
438 uint32_t qkey = va_arg(args, uint32_t);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
439 const LV2_Atom** qval = va_arg(args, const LV2_Atom**);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
440 if (qkey == prop->key && !*qval) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
441 *qval = &prop->value;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
442 if (++matches == n_queries) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
443 return matches;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
444 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
445 break;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
446 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
447 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
448 va_end(args);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
449 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
450 return matches;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
451 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
452
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
453 /**
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
454 Variable argument version of lv2_atom_object_query() with types.
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
455
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
456 This is like lv2_atom_object_get(), but each entry has an additional
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
457 parameter to specify the required type. Only atoms with a matching type
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
458 will be selected.
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
459
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
460 The arguments should be a series of uint32_t key, const LV2_Atom**, uint32_t
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
461 type triples, terminated by a zero key. The value pointers MUST be
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
462 initialized to NULL. For example:
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
463
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
464 @code
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
465 const LV2_Atom_String* name = NULL;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
466 const LV2_Atom_Int* age = NULL;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
467 lv2_atom_object_get(obj,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
468 uris.name_key, &name, uris.atom_String,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
469 uris.age_key, &age, uris.atom_Int
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
470 0);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
471 @endcode
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
472 */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
473 static inline int
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
474 lv2_atom_object_get_typed(const LV2_Atom_Object* object, ...)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
475 {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
476 int matches = 0;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
477 int n_queries = 0;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
478
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
479 /* Count number of keys so we can short-circuit when done */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
480 va_list args;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
481 va_start(args, object);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
482 for (n_queries = 0; va_arg(args, uint32_t); ++n_queries) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
483 if (!va_arg(args, const LV2_Atom**) ||
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
484 !va_arg(args, uint32_t)) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
485 return -1;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
486 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
487 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
488 va_end(args);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
489
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
490 LV2_ATOM_OBJECT_FOREACH(object, prop) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
491 va_start(args, object);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
492 for (int i = 0; i < n_queries; ++i) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
493 const uint32_t qkey = va_arg(args, uint32_t);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
494 const LV2_Atom** qval = va_arg(args, const LV2_Atom**);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
495 const uint32_t qtype = va_arg(args, uint32_t);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
496 if (!*qval && qkey == prop->key && qtype == prop->value.type) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
497 *qval = &prop->value;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
498 if (++matches == n_queries) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
499 return matches;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
500 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
501 break;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
502 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
503 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
504 va_end(args);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
505 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
506 return matches;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
507 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
508
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
509 /**
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
510 @}
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
511 @}
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
512 */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
513
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
514 #ifdef __cplusplus
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
515 } /* extern "C" */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
516 #endif
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
517
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
518 #endif /* LV2_ATOM_UTIL_H */