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82 lines
3.7 KiB
82 lines
3.7 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_CONTAINERS_INDEX_H |
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#define VC_CONTAINERS_INDEX_H |
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/** \file containers_index.h |
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* Definition of index utilitie for containers. Creates and maintains an |
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* index of file offsets and times, and is able to suggest a file position |
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* to seek to achieve a given time target. Useful for container formats |
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* that don't include an index. |
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*/ |
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#include "containers/containers.h" |
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struct VC_CONTAINER_INDEX_T; |
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typedef struct VC_CONTAINER_INDEX_T VC_CONTAINER_INDEX_T; |
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/** |
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* Creates an index with a suggested number of entries. |
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* @param index Pointer to created index will be filled here on success. |
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* @param length Suggested length of index. |
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* @return Status code |
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*/ |
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VC_CONTAINER_STATUS_T vc_container_index_create( VC_CONTAINER_INDEX_T **index, int length ); |
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/** |
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* Frees an index. |
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* @param index Pointer to valid index. |
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* @return Status code. |
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*/ |
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VC_CONTAINER_STATUS_T vc_container_index_free( VC_CONTAINER_INDEX_T *index ); |
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/** |
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* Adds an entry to the index. If the index is full then some stored records will be |
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* discarded. |
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* @param index Pointer to a valid index. |
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* @param time Timestamp of new index entry. |
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* @param file_offset File offset for new index entry. |
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* @return Status code |
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*/ |
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VC_CONTAINER_STATUS_T vc_container_index_add( VC_CONTAINER_INDEX_T *index, int64_t time, int64_t file_offset ); |
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/** |
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* Retrieves the best entry for the supplied time offset. |
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* @param index Pointer to valid index. |
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* @param later If true, the selected entry is the earliest retained entry with a greater or equal timestamp. |
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* If false, the selected entry is the latest retained entry with an earlier or equal timestamp. |
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* @param time The requested time. On success, this is filled in with the time of the selected entry. |
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* @param file_offset On success, this is filled in with the file offset of the selected entry. |
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* @param past Set if the requested time is after the last entry in the index. |
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* @return Status code. |
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*/ |
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VC_CONTAINER_STATUS_T vc_container_index_get( VC_CONTAINER_INDEX_T *index, int later, int64_t *time, int64_t *file_offset, int *past ); |
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#endif /* VC_CONTAINERS_WRITER_UTILS_H */
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