aboutsummaryrefslogtreecommitdiffstats
path: root/lv2/event/event-helpers.h
diff options
context:
space:
mode:
Diffstat (limited to 'lv2/event/event-helpers.h')
-rw-r--r--lv2/event/event-helpers.h189
1 files changed, 88 insertions, 101 deletions
diff --git a/lv2/event/event-helpers.h b/lv2/event/event-helpers.h
index 6b39235..7e3f19c 100644
--- a/lv2/event/event-helpers.h
+++ b/lv2/event/event-helpers.h
@@ -47,96 +47,87 @@ LV2_DISABLE_DEPRECATION_WARNINGS
* Note that these functions are all static inline which basically means:
* do not take the address of these functions. */
-
/** Pad a size to 64 bits (for event sizes) */
static inline uint16_t
lv2_event_pad_size(uint16_t size)
{
- return (uint16_t)(size + 7U) & (uint16_t)(~7U);
+ return (uint16_t)(size + 7U) & (uint16_t)(~7U);
}
-
/** Initialize (empty, reset..) an existing event buffer.
* The contents of buf are ignored entirely and overwritten, except capacity
* which is unmodified. */
static inline void
-lv2_event_buffer_reset(LV2_Event_Buffer* buf,
- uint16_t stamp_type,
- uint8_t* data)
+lv2_event_buffer_reset(LV2_Event_Buffer* buf,
+ uint16_t stamp_type,
+ uint8_t* data)
{
- buf->data = data;
- buf->header_size = sizeof(LV2_Event_Buffer);
- buf->stamp_type = stamp_type;
- buf->event_count = 0;
- buf->size = 0;
+ buf->data = data;
+ buf->header_size = sizeof(LV2_Event_Buffer);
+ buf->stamp_type = stamp_type;
+ buf->event_count = 0;
+ buf->size = 0;
}
-
/** Allocate a new, empty event buffer. */
static inline LV2_Event_Buffer*
lv2_event_buffer_new(uint32_t capacity, uint16_t stamp_type)
{
- const size_t size = sizeof(LV2_Event_Buffer) + capacity;
- LV2_Event_Buffer* buf = (LV2_Event_Buffer*)malloc(size);
- if (buf != NULL) {
- buf->capacity = capacity;
- lv2_event_buffer_reset(buf, stamp_type, (uint8_t *)(buf + 1));
- return buf;
- }
- return NULL;
+ const size_t size = sizeof(LV2_Event_Buffer) + capacity;
+ LV2_Event_Buffer* buf = (LV2_Event_Buffer*)malloc(size);
+ if (buf != NULL) {
+ buf->capacity = capacity;
+ lv2_event_buffer_reset(buf, stamp_type, (uint8_t*)(buf + 1));
+ return buf;
+ }
+ return NULL;
}
-
/** An iterator over an LV2_Event_Buffer.
*
* Multiple simultaneous read iterators over a single buffer is fine,
* but changing the buffer invalidates all iterators. */
typedef struct {
- LV2_Event_Buffer* buf;
- uint32_t offset;
+ LV2_Event_Buffer* buf;
+ uint32_t offset;
} LV2_Event_Iterator;
-
/** Reset an iterator to point to the start of `buf`.
* @return True if `iter` is valid, otherwise false (buffer is empty) */
static inline bool
-lv2_event_begin(LV2_Event_Iterator* iter,
- LV2_Event_Buffer* buf)
+lv2_event_begin(LV2_Event_Iterator* iter, LV2_Event_Buffer* buf)
{
- iter->buf = buf;
- iter->offset = 0;
- return (buf->size > 0);
+ iter->buf = buf;
+ iter->offset = 0;
+ return (buf->size > 0);
}
-
/** Check if `iter` is valid.
* @return True if `iter` is valid, otherwise false (past end of buffer) */
static inline bool
lv2_event_is_valid(LV2_Event_Iterator* iter)
{
- return (iter->buf && (iter->offset < iter->buf->size));
+ return (iter->buf && (iter->offset < iter->buf->size));
}
-
/** Advance `iter` forward one event.
* `iter` must be valid.
* @return True if `iter` is valid, otherwise false (reached end of buffer) */
static inline bool
lv2_event_increment(LV2_Event_Iterator* iter)
{
- if (!lv2_event_is_valid(iter)) {
- return false;
- }
+ if (!lv2_event_is_valid(iter)) {
+ return false;
+ }
- LV2_Event* const ev = (LV2_Event*)(iter->buf->data + iter->offset);
+ LV2_Event* const ev = (LV2_Event*)(iter->buf->data + iter->offset);
- iter->offset += lv2_event_pad_size(
- (uint16_t)((uint16_t)sizeof(LV2_Event) + ev->size));
+ iter->offset +=
+ lv2_event_pad_size((uint16_t)((uint16_t)sizeof(LV2_Event) + ev->size));
- return true;
+ return true;
}
-
/** Dereference an event iterator (get the event currently pointed at).
* `iter` must be valid.
* `data` if non-NULL, will be set to point to the contents of the event
@@ -145,23 +136,21 @@ lv2_event_increment(LV2_Event_Iterator* iter)
* if the end of the buffer is reached (in which case `data` is
* also set to NULL). */
static inline LV2_Event*
-lv2_event_get(LV2_Event_Iterator* iter,
- uint8_t** data)
+lv2_event_get(LV2_Event_Iterator* iter, uint8_t** data)
{
- if (!lv2_event_is_valid(iter)) {
- return NULL;
- }
+ if (!lv2_event_is_valid(iter)) {
+ return NULL;
+ }
- LV2_Event* const ev = (LV2_Event*)(iter->buf->data + iter->offset);
+ LV2_Event* const ev = (LV2_Event*)(iter->buf->data + iter->offset);
- if (data) {
- *data = (uint8_t*)ev + sizeof(LV2_Event);
- }
+ if (data) {
+ *data = (uint8_t*)ev + sizeof(LV2_Event);
+ }
- return ev;
+ return ev;
}
-
/** Write an event at `iter`.
* The event (if any) pointed to by `iter` will be overwritten, and `iter`
* incremented to point to the following event (i.e. several calls to this
@@ -175,62 +164,60 @@ lv2_event_write(LV2_Event_Iterator* iter,
uint16_t size,
const uint8_t* data)
{
- if (!iter->buf) {
- return false;
- }
+ if (!iter->buf) {
+ return false;
+ }
- if (iter->buf->capacity - iter->buf->size < sizeof(LV2_Event) + size) {
- return false;
- }
+ if (iter->buf->capacity - iter->buf->size < sizeof(LV2_Event) + size) {
+ return false;
+ }
- LV2_Event* const ev = (LV2_Event*)(iter->buf->data + iter->offset);
+ LV2_Event* const ev = (LV2_Event*)(iter->buf->data + iter->offset);
- ev->frames = frames;
- ev->subframes = subframes;
- ev->type = type;
- ev->size = size;
- memcpy((uint8_t*)ev + sizeof(LV2_Event), data, size);
- ++iter->buf->event_count;
+ ev->frames = frames;
+ ev->subframes = subframes;
+ ev->type = type;
+ ev->size = size;
+ memcpy((uint8_t*)ev + sizeof(LV2_Event), data, size);
+ ++iter->buf->event_count;
- size = lv2_event_pad_size((uint16_t)(sizeof(LV2_Event) + size));
- iter->buf->size += size;
- iter->offset += size;
+ size = lv2_event_pad_size((uint16_t)(sizeof(LV2_Event) + size));
+ iter->buf->size += size;
+ iter->offset += size;
- return true;
+ return true;
}
-
/** Reserve space for an event in the buffer and return a pointer to
the memory where the caller can write the event data, or NULL if there
is not enough room in the buffer. */
static inline uint8_t*
lv2_event_reserve(LV2_Event_Iterator* iter,
- uint32_t frames,
- uint32_t subframes,
- uint16_t type,
- uint16_t size)
+ uint32_t frames,
+ uint32_t subframes,
+ uint16_t type,
+ uint16_t size)
{
- const uint16_t total_size = (uint16_t)(sizeof(LV2_Event) + size);
- if (iter->buf->capacity - iter->buf->size < total_size) {
- return NULL;
- }
+ const uint16_t total_size = (uint16_t)(sizeof(LV2_Event) + size);
+ if (iter->buf->capacity - iter->buf->size < total_size) {
+ return NULL;
+ }
- LV2_Event* const ev = (LV2_Event*)(iter->buf->data + iter->offset);
+ LV2_Event* const ev = (LV2_Event*)(iter->buf->data + iter->offset);
- ev->frames = frames;
- ev->subframes = subframes;
- ev->type = type;
- ev->size = size;
- ++iter->buf->event_count;
+ ev->frames = frames;
+ ev->subframes = subframes;
+ ev->type = type;
+ ev->size = size;
+ ++iter->buf->event_count;
- const uint16_t padded_size = lv2_event_pad_size(total_size);
- iter->buf->size += padded_size;
- iter->offset += padded_size;
+ const uint16_t padded_size = lv2_event_pad_size(total_size);
+ iter->buf->size += padded_size;
+ iter->offset += padded_size;
- return (uint8_t*)ev + sizeof(LV2_Event);
+ return (uint8_t*)ev + sizeof(LV2_Event);
}
-
/** Write an event at `iter`.
* The event (if any) pointed to by `iter` will be overwritten, and `iter`
* incremented to point to the following event (i.e. several calls to this
@@ -241,28 +228,28 @@ lv2_event_write_event(LV2_Event_Iterator* iter,
const LV2_Event* ev,
const uint8_t* data)
{
- const uint16_t total_size = (uint16_t)(sizeof(LV2_Event) + ev->size);
- if (iter->buf->capacity - iter->buf->size < total_size) {
- return false;
- }
+ const uint16_t total_size = (uint16_t)(sizeof(LV2_Event) + ev->size);
+ if (iter->buf->capacity - iter->buf->size < total_size) {
+ return false;
+ }
- LV2_Event* const write_ev = (LV2_Event*)(iter->buf->data + iter->offset);
+ LV2_Event* const write_ev = (LV2_Event*)(iter->buf->data + iter->offset);
- *write_ev = *ev;
- memcpy((uint8_t*)write_ev + sizeof(LV2_Event), data, ev->size);
- ++iter->buf->event_count;
+ *write_ev = *ev;
+ memcpy((uint8_t*)write_ev + sizeof(LV2_Event), data, ev->size);
+ ++iter->buf->event_count;
- const uint16_t padded_size = lv2_event_pad_size(total_size);
- iter->buf->size += padded_size;
- iter->offset += padded_size;
+ const uint16_t padded_size = lv2_event_pad_size(total_size);
+ iter->buf->size += padded_size;
+ iter->offset += padded_size;
- return true;
+ return true;
}
LV2_RESTORE_WARNINGS
#ifdef __cplusplus
-} /* extern "C" */
+} /* extern "C" */
#endif
#endif /* LV2_EVENT_HELPERS_H */