From fa10bccb322dedee6b72d6f8c1834de8b194d3ca Mon Sep 17 00:00:00 2001 From: Bent Bisballe Nyeng Date: Mon, 11 Jun 2012 19:15:09 +0200 Subject: Port to new LV2 state interface. Use new lv2-1.0 header files (from system) and remove local copies of same. --- lv2/event-helpers.h | 243 ---------------------------------------------------- 1 file changed, 243 deletions(-) delete mode 100644 lv2/event-helpers.h (limited to 'lv2/event-helpers.h') diff --git a/lv2/event-helpers.h b/lv2/event-helpers.h deleted file mode 100644 index fb7de65..0000000 --- a/lv2/event-helpers.h +++ /dev/null @@ -1,243 +0,0 @@ -/* lv2_event_helpers.h - Helper functions for the LV2 events extension. - * - * Copyright (C) 2008-2009 David Robillard - * - * This header is free software; you can redistribute it and/or modify it - * under the terms of the GNU Lesser General Public License as published - * by the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This header is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public - * License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this header; if not, write to the Free Software Foundation, - * Inc., 59 Temple Place, Suite 330, Boston, MA 01222-1307 USA - */ - -#ifndef LV2_EVENT_HELPERS_H -#define LV2_EVENT_HELPERS_H - -#include -#include -#include -#include -#include -#include "lv2_event.h" - -/** @file - * Helper functions for the LV2 Event extension - * . - * - * These functions are provided for convenience only, use of them is not - * required for supporting lv2ev (i.e. the events extension is defined by the - * raw buffer format described in lv2_event.h and NOT by this API). - * - * 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 (size + 7) & (~7); -} - - -/** 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) -{ - 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) -{ - LV2_Event_Buffer* buf = (LV2_Event_Buffer*)malloc(sizeof(LV2_Event_Buffer) + capacity); - if (buf != NULL) { - buf->capacity = capacity; - lv2_event_buffer_reset(buf, stamp_type, (uint8_t *)(buf + 1)); - return buf; - } else { - 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 (e.g. RW Lock). */ -typedef struct { - LV2_Event_Buffer* buf; - uint32_t offset; -} LV2_Event_Iterator; - - -/** Reset an iterator to point to the start of @a buf. - * @return True if @a iter is valid, otherwise false (buffer is empty) */ -static inline bool -lv2_event_begin(LV2_Event_Iterator* iter, - LV2_Event_Buffer* buf) -{ - iter->buf = buf; - iter->offset = 0; - return (buf->size > 0); -} - - -/** Check if @a iter is valid. - * @return True if @a iter is valid, otherwise false (past end of buffer) */ -static inline bool -lv2_event_is_valid(LV2_Event_Iterator* iter) -{ - return (iter->offset < iter->buf->size); -} - - -/** Advance @a iter forward one event. - * @a iter must be valid. - * @return True if @a iter is valid, otherwise false (reached end of buffer) */ -static inline bool -lv2_event_increment(LV2_Event_Iterator* iter) -{ - assert(lv2_event_is_valid(iter)); - - LV2_Event* const ev = (LV2_Event*)( - (uint8_t*)iter->buf->data + iter->offset); - - iter->offset += lv2_event_pad_size(sizeof(LV2_Event) + ev->size); - - return true; -} - - -/** Dereference an event iterator (get the event currently pointed at). - * @a iter must be valid. - * @a data if non-NULL, will be set to point to the contents of the event - * returned. - * @return A Pointer to the event @a iter is currently pointing at, or NULL - * if the end of the buffer is reached (in which case @a data is - * also set to NULL). */ -static inline LV2_Event* -lv2_event_get(LV2_Event_Iterator* iter, - uint8_t** data) -{ - assert(lv2_event_is_valid(iter)); - - LV2_Event* const ev = (LV2_Event*)( - (uint8_t*)iter->buf->data + iter->offset); - - if (data) - *data = (uint8_t*)ev + sizeof(LV2_Event); - - return ev; -} - - -/** Write an event at @a iter. - * The event (if any) pointed to by @a iter will be overwritten, and @a iter - * incremented to point to the following event (i.e. several calls to this - * function can be done in sequence without twiddling iter in-between). - * @return True if event was written, otherwise false (buffer is full). */ -static inline bool -lv2_event_write(LV2_Event_Iterator* iter, - uint32_t frames, - uint32_t subframes, - uint16_t type, - uint16_t size, - const uint8_t* data) -{ - if (iter->buf->capacity - iter->buf->size < sizeof(LV2_Event) + size) - return false; - - LV2_Event* const ev = (LV2_Event*)( - (uint8_t*)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; - - size = lv2_event_pad_size(sizeof(LV2_Event) + size); - iter->buf->size += size; - iter->offset += size; - - 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) -{ - size = lv2_event_pad_size(size); - if (iter->buf->capacity - iter->buf->size < sizeof(LV2_Event) + size) - return NULL; - - LV2_Event* const ev = (LV2_Event*)((uint8_t*)iter->buf->data + - iter->offset); - - ev->frames = frames; - ev->subframes = subframes; - ev->type = type; - ev->size = size; - ++iter->buf->event_count; - - size = lv2_event_pad_size(sizeof(LV2_Event) + size); - iter->buf->size += size; - iter->offset += size; - - return (uint8_t*)ev + sizeof(LV2_Event); -} - - -/** Write an event at @a iter. - * The event (if any) pointed to by @a iter will be overwritten, and @a iter - * incremented to point to the following event (i.e. several calls to this - * function can be done in sequence without twiddling iter in-between). - * @return True if event was written, otherwise false (buffer is full). */ -static inline bool -lv2_event_write_event(LV2_Event_Iterator* iter, - const LV2_Event* ev, - const uint8_t* data) -{ - if (iter->buf->capacity - iter->buf->size < sizeof(LV2_Event) + ev->size) - return false; - - LV2_Event* const write_ev = (LV2_Event*)( - (uint8_t*)iter->buf->data + iter->offset); - - *write_ev = *ev; - memcpy((uint8_t*)write_ev + sizeof(LV2_Event), data, ev->size); - ++iter->buf->event_count; - - const uint16_t size = lv2_event_pad_size(sizeof(LV2_Event) + ev->size); - iter->buf->size += size; - iter->offset += size; - - return true; -} - -#endif /* LV2_EVENT_HELPERS_H */ - -- cgit v1.2.3