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100 lines
5.0 KiB
C
100 lines
5.0 KiB
C
/*
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Copyright (c) 2012, Broadcom Europe Ltd
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef VC_IMAGE_METADATA_H
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#define VC_IMAGE_METADATA_H
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#include "vcfw/rtos/rtos.h"
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#include "helpers/vc_image/metadata_fourcc.h"
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#define VC_METADATA_ALIGN 3
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/******************************************************************************
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Types of metadata.
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******************************************************************************/
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typedef unsigned int VC_METADATA_TYPE_T;
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/******************************************************************************
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Metadata and item headers.
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******************************************************************************/
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typedef struct vc_metadata_item_s {
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VC_METADATA_TYPE_T type;
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int len;
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} VC_METADATA_ITEM_T;
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typedef struct vc_metadata_header_s {
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int size;
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#ifdef VCMODS_LCC
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unsigned char readonly;
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#else
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unsigned char readonly:1;
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#endif
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int offset_next;
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RTOS_LATCH_T latch;
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} VC_METADATA_HEADER_T;
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/******************************************************************************
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Public declarations.
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******************************************************************************/
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// Initialises a metadata header structure
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int vc_metadata_initialise(VC_METADATA_HEADER_T *header, int size);
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// Add a metadata entry to the buffer
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int vc_metadata_add(VC_METADATA_HEADER_T *header, void *data, VC_METADATA_TYPE_T type, int len);
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// Get a (pointer to a) particular metadata item from the buffer (optionally copy the data to dest), and return the length of the item
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void *vc_metadata_get_with_length(void *dest, VC_METADATA_HEADER_T *header, VC_METADATA_TYPE_T type, int *retcode, int *len);
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// Get a (pointer to a) particular metadata item from the buffer (optionally copy the data to dest)
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void *vc_metadata_get(void *dest, VC_METADATA_HEADER_T *header, VC_METADATA_TYPE_T type, int *retcode);
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// Clear the metadata buffer and reset the header (clears readonly flag)
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int vc_metadata_clear(VC_METADATA_HEADER_T *header);
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// Set or clear the read-only flag in the metadata buffer
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int vc_metadata_set_readonly(VC_METADATA_HEADER_T *header, int value);
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// Copies the contents of one metadata buffer to the other (appends the destination buffer)
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int vc_metadata_copy(VC_METADATA_HEADER_T *dest, VC_METADATA_HEADER_T *src);
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// Overwrites an item in the metadata buffer (caller must make sure the sizes match!)
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int vc_metadata_overwrite(VC_METADATA_HEADER_T *header, void *data, VC_METADATA_TYPE_T type);
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// Flush the metadata buffer out of the cache
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int vc_metadata_cache_flush(VC_METADATA_HEADER_T *header);
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// Locks the vc_metadata library semaphore
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int vc_metadata_lock(VC_METADATA_HEADER_T *header);
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// Unlocks the vc_metadata library semaphore
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int vc_metadata_unlock(VC_METADATA_HEADER_T *header);
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/******************************************************************************
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Wrappers for the above functions using VC_IMAGEs.
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******************************************************************************/
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#define vc_image_metadata_initialise(i, s) vc_metadata_initialise((i)->metadata, s)
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#define vc_image_metadata_add(i, d, t, l) vc_metadata_add((i)->metadata, d, t, l)
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#define vc_image_metadata_get(d, i, t, r) vc_metadata_get(d, (i)->metadata, t, r)
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#define vc_image_metadata_clear(i) vc_metadata_clear((i)->metadata)
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#define vc_image_metadata_set_readonly(i, v) vc_metadata_set_readonly((i)->metadata, v)
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#define vc_image_metadata_copy(d, s) vc_metadata_copy((d)->metadata, (s)->metadata)
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#define vc_image_metadata_overwrite(i, d, t) vc_metadata_overwrite((i)->metadata, d, t)
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#define vc_image_metadata_cache_flush(i) vc_metadata_cache_flush((i)->metadata)
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#endif
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