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/*
* Copyright (c) 2019, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
/*!\file
* \brief Describes the internal functions associated with the aom image
* descriptor.
*
*/
#ifndef AOM_AOM_INTERNAL_AOM_IMAGE_INTERNAL_H_
#define AOM_AOM_INTERNAL_AOM_IMAGE_INTERNAL_H_
#include "aom/aom_image.h"
#ifdef __cplusplus
extern "C" {
#endif
/*!\brief Array of aom_metadata structs for an image. */
struct aom_metadata_array {
size_t sz; /* Number of metadata structs in the list */
aom_metadata_t **metadata_array; /* Array of metadata structs */
};
/*!\brief Alloc memory for aom_metadata_array struct.
*
* Allocate memory for aom_metadata_array struct.
* If sz is 0 the aom_metadata_array structs internal buffer list will be NULL,
* but the aom_metadata_array struct itself will still be allocated.
* Returns a pointer to the allocated struct or NULL on failure.
*
* \param[in] sz Size of internal metadata list buffer
*/
aom_metadata_array_t *aom_img_metadata_array_alloc(size_t sz);
/*!\brief Free metadata array struct.
*
* Free metadata array struct and all metadata structs inside.
*
* \param[in] arr Metadata array struct pointer
*/
void aom_img_metadata_array_free(aom_metadata_array_t *arr);
typedef void *(*aom_alloc_img_data_cb_fn_t)(void *priv, size_t size);
/*!\brief Open a descriptor, allocating storage for the underlying image by
* using the provided callback function.
*
* Returns a descriptor for storing an image of the given format. The storage
* for the image is allocated by using the provided callback function. Unlike
* aom_img_alloc(), the returned descriptor does not own the storage for the
* image. The caller is responsible for freeing the storage for the image.
*
* Note: If the callback function is invoked and succeeds,
* aom_img_alloc_with_cb() is guaranteed to succeed. Therefore, if
* aom_img_alloc_with_cb() fails, the caller is assured that no storage was
* allocated.
*
* \param[in] img Pointer to storage for descriptor. If this parameter
* is NULL, the storage for the descriptor will be
* allocated on the heap.
* \param[in] fmt Format for the image
* \param[in] d_w Width of the image
* \param[in] d_h Height of the image
* \param[in] align Alignment, in bytes, of the image buffer and
* each row in the image (stride).
* \param[in] alloc_cb Callback function used to allocate storage for the
* image.
* \param[in] cb_priv The first argument ('priv') for the callback
* function.
*
* \return Returns a pointer to the initialized image descriptor. If the img
* parameter is non-null, the value of the img parameter will be
* returned.
*/
aom_image_t *aom_img_alloc_with_cb(aom_image_t *img, aom_img_fmt_t fmt,
unsigned int d_w, unsigned int d_h,
unsigned int align,
aom_alloc_img_data_cb_fn_t alloc_cb,
void *cb_priv);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AOM_INTERNAL_AOM_IMAGE_INTERNAL_H_
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