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117 lines
4.4 KiB
C
117 lines
4.4 KiB
C
/*
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* Copyright © 2018, VideoLAN and dav1d authors
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* Copyright © 2018, Two Orioles, LLC
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* All rights reserved.
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*
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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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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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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 OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY 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 DAV1D_DATA_H
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#define DAV1D_DATA_H
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#include <stddef.h>
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#include <stdint.h>
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#include "common.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct Dav1dData {
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const uint8_t *data; ///< data pointer
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size_t sz; ///< data size
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struct Dav1dRef *ref; ///< allocation origin
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Dav1dDataProps m; ///< user provided metadata passed to the output picture
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} Dav1dData;
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/**
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* Allocate data.
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*
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* @param data Input context.
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* @param sz Size of the data that should be allocated.
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*
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* @return Pointer to the allocated buffer on success. NULL on error.
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*/
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DAV1D_API uint8_t * dav1d_data_create(Dav1dData *data, size_t sz);
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/**
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* Wrap an existing data array.
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*
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* @param data Input context.
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* @param buf The data to be wrapped.
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* @param sz Size of the data.
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* @param free_callback Function to be called when we release our last
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* reference to this data. In this callback, $buf will be
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* the $buf argument to this function, and $cookie will
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* be the $cookie input argument to this function.
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* @param cookie Opaque parameter passed to free_callback().
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*
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* @return 0 on success. A negative DAV1D_ERR value on error.
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*/
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DAV1D_API int dav1d_data_wrap(Dav1dData *data, const uint8_t *buf, size_t sz,
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void (*free_callback)(const uint8_t *buf, void *cookie),
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void *cookie);
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/**
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* Wrap a user-provided data pointer into a reference counted object.
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*
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* data->m.user_data field will initialized to wrap the provided $user_data
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* pointer.
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*
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* $free_callback will be called on the same thread that released the last
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* reference. If frame threading is used, make sure $free_callback is
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* thread-safe.
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*
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* @param data Input context.
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* @param user_data The user data to be wrapped.
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* @param free_callback Function to be called when we release our last
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* reference to this data. In this callback, $user_data
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* will be the $user_data argument to this function, and
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* $cookie will be the $cookie input argument to this
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* function.
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* @param cookie Opaque parameter passed to $free_callback.
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*
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* @return 0 on success. A negative DAV1D_ERR value on error.
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*/
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DAV1D_API int dav1d_data_wrap_user_data(Dav1dData *data,
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const uint8_t *user_data,
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void (*free_callback)(const uint8_t *user_data,
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void *cookie),
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void *cookie);
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/**
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* Free the data reference.
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*
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* The reference count for data->m.user_data will be decremented (if it has been
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* initialized with dav1d_data_wrap_user_data). The $data object will be memset
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* to 0.
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*
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* @param data Input context.
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*/
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DAV1D_API void dav1d_data_unref(Dav1dData *data);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* DAV1D_DATA_H */
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