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annotate DPF-Prymula-audioplugins/dpf/distrho/src/lv2/event-helpers.h @ 4:0962f0296c8a

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author prymula <prymula76@outlook.com>
date Tue, 30 Jan 2024 16:43:10 +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 event-helpers.h Helper functions for the LV2 Event extension
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19 <http://lv2plug.in/ns/ext/event>.
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20 */
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21
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22 #ifndef LV2_EVENT_HELPERS_H
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23 #define LV2_EVENT_HELPERS_H
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24
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25 #include <stdint.h>
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26 #include <stdlib.h>
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27 #include <string.h>
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28
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29 #include "event.h"
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30
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31 #ifdef __cplusplus
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32 extern "C" {
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33 #else
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34 # include <stdbool.h>
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35 #endif
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36
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37 /** @file
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38 * Helper functions for the LV2 Event extension
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39 * <http://lv2plug.in/ns/ext/event>.
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40 *
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41 * These functions are provided for convenience only, use of them is not
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42 * required for supporting lv2ev (i.e. the events extension is defined by the
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43 * raw buffer format described in lv2_event.h and NOT by this API).
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44 *
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45 * Note that these functions are all static inline which basically means:
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46 * do not take the address of these functions. */
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47
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48
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49 /** Pad a size to 64 bits (for event sizes) */
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50 static inline uint16_t
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51 lv2_event_pad_size(uint16_t size)
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52 {
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53 return (uint16_t)(size + 7U) & (uint16_t)(~7U);
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54 }
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55
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56
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57 /** Initialize (empty, reset..) an existing event buffer.
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58 * The contents of buf are ignored entirely and overwritten, except capacity
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59 * which is unmodified. */
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60 static inline void
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61 lv2_event_buffer_reset(LV2_Event_Buffer* buf,
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62 uint16_t stamp_type,
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63 uint8_t* data)
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64 {
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65 buf->data = data;
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66 buf->header_size = sizeof(LV2_Event_Buffer);
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67 buf->stamp_type = stamp_type;
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68 buf->event_count = 0;
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69 buf->size = 0;
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70 }
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71
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72
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73 /** Allocate a new, empty event buffer. */
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74 static inline LV2_Event_Buffer*
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75 lv2_event_buffer_new(uint32_t capacity, uint16_t stamp_type)
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76 {
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77 const size_t size = sizeof(LV2_Event_Buffer) + capacity;
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78 LV2_Event_Buffer* buf = (LV2_Event_Buffer*)malloc(size);
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79 if (buf != NULL) {
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80 buf->capacity = capacity;
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81 lv2_event_buffer_reset(buf, stamp_type, (uint8_t *)(buf + 1));
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82 return buf;
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83 } else {
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84 return NULL;
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85 }
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86 }
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87
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88
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89 /** An iterator over an LV2_Event_Buffer.
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90 *
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91 * Multiple simultaneous read iterators over a single buffer is fine,
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92 * but changing the buffer invalidates all iterators (e.g. RW Lock). */
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93 typedef struct {
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94 LV2_Event_Buffer* buf;
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95 uint32_t offset;
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96 } LV2_Event_Iterator;
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97
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98
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99 /** Reset an iterator to point to the start of `buf`.
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100 * @return True if `iter` is valid, otherwise false (buffer is empty) */
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101 static inline bool
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102 lv2_event_begin(LV2_Event_Iterator* iter,
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103 LV2_Event_Buffer* buf)
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104 {
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105 iter->buf = buf;
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106 iter->offset = 0;
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107 return (buf->size > 0);
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108 }
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109
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110
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111 /** Check if `iter` is valid.
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112 * @return True if `iter` is valid, otherwise false (past end of buffer) */
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113 static inline bool
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114 lv2_event_is_valid(LV2_Event_Iterator* iter)
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115 {
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116 return (iter->buf && (iter->offset < iter->buf->size));
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117 }
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118
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119
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120 /** Advance `iter` forward one event.
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121 * `iter` must be valid.
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122 * @return True if `iter` is valid, otherwise false (reached end of buffer) */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
123 static inline bool
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
124 lv2_event_increment(LV2_Event_Iterator* iter)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
125 {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
126 if (!lv2_event_is_valid(iter)) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
127 return false;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
128 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
129
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
130 LV2_Event* const ev = (LV2_Event*)(
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
131 (uint8_t*)iter->buf->data + iter->offset);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
132
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
133 iter->offset += lv2_event_pad_size(
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
134 (uint16_t)((uint16_t)sizeof(LV2_Event) + ev->size));
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
135
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
136 return true;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
137 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
138
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
139
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
140 /** Dereference an event iterator (get the event currently pointed at).
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
141 * `iter` must be valid.
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parents:
diff changeset
142 * `data` if non-NULL, will be set to point to the contents of the event
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
143 * returned.
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
144 * @return A Pointer to the event `iter` is currently pointing at, or NULL
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
145 * if the end of the buffer is reached (in which case `data` is
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
146 * also set to NULL). */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
147 static inline LV2_Event*
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
148 lv2_event_get(LV2_Event_Iterator* iter,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
149 uint8_t** data)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
150 {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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parents:
diff changeset
151 if (!lv2_event_is_valid(iter)) {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
152 return NULL;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
153 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
154
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
155 LV2_Event* const ev = (LV2_Event*)(
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
156 (uint8_t*)iter->buf->data + iter->offset);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
157
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
158 if (data)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
159 *data = (uint8_t*)ev + sizeof(LV2_Event);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
160
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
161 return ev;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
162 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
163
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
164
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
165 /** Write an event at `iter`.
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
166 * The event (if any) pointed to by `iter` will be overwritten, and `iter`
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
167 * incremented to point to the following event (i.e. several calls to this
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
168 * function can be done in sequence without twiddling iter in-between).
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
169 * @return True if event was written, otherwise false (buffer is full). */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
170 static inline bool
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
171 lv2_event_write(LV2_Event_Iterator* iter,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
172 uint32_t frames,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
173 uint32_t subframes,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
174 uint16_t type,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
175 uint16_t size,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
176 const uint8_t* data)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
177 {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
178 if (!iter->buf)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
179 return false;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
180
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
181 if (iter->buf->capacity - iter->buf->size < sizeof(LV2_Event) + size)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
182 return false;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
183
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
184 LV2_Event* const ev = (LV2_Event*)(
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
185 (uint8_t*)iter->buf->data + iter->offset);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
186
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
187 ev->frames = frames;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
188 ev->subframes = subframes;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
189 ev->type = type;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
190 ev->size = size;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
191 memcpy((uint8_t*)ev + sizeof(LV2_Event), data, size);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
192 ++iter->buf->event_count;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
193
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
194 size = lv2_event_pad_size((uint16_t)(sizeof(LV2_Event) + size));
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
195 iter->buf->size += size;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
196 iter->offset += size;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
197
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
198 return true;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
199 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
200
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
201
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
202 /** Reserve space for an event in the buffer and return a pointer to
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
203 the memory where the caller can write the event data, or NULL if there
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
204 is not enough room in the buffer. */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
205 static inline uint8_t*
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
206 lv2_event_reserve(LV2_Event_Iterator* iter,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
207 uint32_t frames,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
208 uint32_t subframes,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
209 uint16_t type,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
210 uint16_t size)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
211 {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
212 const uint16_t total_size = (uint16_t)(sizeof(LV2_Event) + size);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
213 if (iter->buf->capacity - iter->buf->size < total_size)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
214 return NULL;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
215
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
216 LV2_Event* const ev = (LV2_Event*)(
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
217 (uint8_t*)iter->buf->data + iter->offset);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
218
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
219 ev->frames = frames;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
220 ev->subframes = subframes;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
221 ev->type = type;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
222 ev->size = size;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
223 ++iter->buf->event_count;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
224
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
225 const uint16_t padded_size = lv2_event_pad_size(total_size);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
226 iter->buf->size += padded_size;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
227 iter->offset += padded_size;
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
228
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
229 return (uint8_t*)ev + sizeof(LV2_Event);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
230 }
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
231
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
232
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
233 /** Write an event at `iter`.
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
234 * The event (if any) pointed to by `iter` will be overwritten, and `iter`
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
235 * incremented to point to the following event (i.e. several calls to this
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
236 * function can be done in sequence without twiddling iter in-between).
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
237 * @return True if event was written, otherwise false (buffer is full). */
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
238 static inline bool
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
239 lv2_event_write_event(LV2_Event_Iterator* iter,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
240 const LV2_Event* ev,
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
241 const uint8_t* data)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
242 {
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
243 const uint16_t total_size = (uint16_t)(sizeof(LV2_Event) + ev->size);
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
prymula <prymula76@outlook.com>
parents:
diff changeset
244 if (iter->buf->capacity - iter->buf->size < total_size)
84e66ea83026 DPF-Prymula-audioplugins-0.231015-2
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245 return false;
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246
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247 LV2_Event* const write_ev = (LV2_Event*)(
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248 (uint8_t*)iter->buf->data + iter->offset);
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249
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250 *write_ev = *ev;
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251 memcpy((uint8_t*)write_ev + sizeof(LV2_Event), data, ev->size);
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252 ++iter->buf->event_count;
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253
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254 const uint16_t padded_size = lv2_event_pad_size(total_size);
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255 iter->buf->size += padded_size;
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256 iter->offset += padded_size;
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257
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258 return true;
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259 }
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260
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261 #ifdef __cplusplus
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262 } /* extern "C" */
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263 #endif
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264
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265 #endif /* LV2_EVENT_HELPERS_H */