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Diffstat (limited to 'ext/atom.lv2/atom-buffer.h')
| -rw-r--r-- | ext/atom.lv2/atom-buffer.h | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/ext/atom.lv2/atom-buffer.h b/ext/atom.lv2/atom-buffer.h deleted file mode 100644 index f4b90dd..0000000 --- a/ext/atom.lv2/atom-buffer.h +++ /dev/null @@ -1,163 +0,0 @@ -/* - Copyright 2008-2011 David Robillard <http://drobilla.net> - - Permission to use, copy, modify, and/or distribute this software for any - purpose with or without fee is hereby granted, provided that the above - copyright notice and this permission notice appear in all copies. - - THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. -*/ - -/** - @file atom-event-buffer.h Helper functions for atom:EventBuffer. - - Note that these functions are all static inline which basically means: - do not take the address of these functions. -*/ - -#ifndef LV2_ATOM_EVENT_BUFFER_H -#define LV2_ATOM_EVENT_BUFFER_H - -#include <stdint.h> -#include <stdbool.h> -#include <string.h> -#include <stdlib.h> - -#include "lv2/lv2plug.in/ns/ext/atom/atom.h" - -/** - Initialize an existing atom buffer. - All fields of @c buf are reset, except capacity which is unmodified. -*/ -static inline void -lv2_atom_buffer_reset(LV2_Atom_Buffer* buf) -{ - buf->event_count = 0; - buf->size = 0; -} - -/** - Allocate a new, empty atom buffer. -*/ -static inline LV2_Atom_Buffer* -lv2_atom_buffer_new(uint32_t capacity) -{ - const uint32_t size = sizeof(LV2_Atom_Buffer) + capacity; - LV2_Atom_Buffer* buf = (LV2_Atom_Buffer*)malloc(size); - if (buf) { - buf->data = (uint8_t*)(buf + 1); - buf->capacity = capacity; - lv2_atom_buffer_reset(buf); - } - return buf; -} - -/** - Free an atom buffer allocated with lv2_atom_buffer_new(). -*/ -static inline void -lv2_atom_buffer_free(LV2_Atom_Buffer* buf) -{ - free(buf); -} - -/** - An iterator over an LV2_Atom_Buffer. -*/ -typedef struct { - LV2_Atom_Buffer* buf; - uint32_t offset; -} LV2_Atom_Buffer_Iterator; - -/** - Return an iterator to the beginning of @c buf. -*/ -static inline LV2_Atom_Buffer_Iterator -lv2_atom_buffer_begin(LV2_Atom_Buffer* buf) -{ - const LV2_Atom_Buffer_Iterator i = { buf, 0 }; - return i; -} - -/** - Return true iff @c i points to a valid atom. -*/ -static inline bool -lv2_atom_buffer_is_valid(LV2_Atom_Buffer_Iterator i) -{ - return i.offset < i.buf->size; -} - -/** - Return the iterator to the next element after @c i. - @param i A valid iterator to an atom in a buffer. -*/ -static inline LV2_Atom_Buffer_Iterator -lv2_atom_buffer_next(LV2_Atom_Buffer_Iterator i) -{ - if (!lv2_atom_buffer_is_valid(i)) { - return i; - } - const LV2_Atom_Event* const ev = (LV2_Atom_Event*)(i.buf->data + i.offset); - i.offset += lv2_atom_pad_size(sizeof(LV2_Atom_Event) + ev->body.size); - return i; -} - -/** - Return a pointer to the atom currently pointed to by @c i. -*/ -static inline LV2_Atom_Event* -lv2_atom_buffer_get(LV2_Atom_Buffer_Iterator i) -{ - if (!lv2_atom_buffer_is_valid(i)) { - return NULL; - } - return (LV2_Atom_Event*)(i.buf->data + i.offset); -} - -/** - Write an atom to a buffer. - - The atom will be written at the location pointed to by @c i, which will be - incremented to point to the location where the next atom should be written - (which is likely now garbage). Thus, this function can be called repeatedly - with a single @c i to write a sequence of atoms to the buffer. - - @return True if atom was written, otherwise false (buffer is full). -*/ -static inline bool -lv2_atom_buffer_write(LV2_Atom_Buffer_Iterator* i, - uint32_t frames, - uint32_t subframes, - uint32_t type, - uint32_t size, - const uint8_t* data) -{ - const uint32_t free_space = i->buf->capacity - i->buf->size; - if (free_space < sizeof(LV2_Atom_Event) + size) { - return false; - } - - LV2_Atom_Event* const ev = (LV2_Atom_Event*)(i->buf->data + i->offset); - - ev->frames = frames; - ev->subframes = subframes; - ev->body.type = type; - ev->body.size = size; - memcpy((uint8_t*)ev + sizeof(LV2_Atom_Event), data, size); - ++i->buf->event_count; - - size = lv2_atom_pad_size(sizeof(LV2_Atom_Event) + size); - i->buf->size += size; - i->offset += size; - - return true; -} - -#endif /* LV2_ATOM_EVENT_BUFFER_H */ |