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99 lines
5.0 KiB
99 lines
5.0 KiB
/* |
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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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