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/*
* Copyright (c) 2016, 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.
*/
/*!\defgroup aom AOM
* \ingroup codecs
* AOM is aom's newest video compression algorithm that uses motion
* compensated prediction, Discrete Cosine Transform (DCT) coding of the
* prediction error signal and context dependent entropy coding techniques
* based on arithmetic principles. It features:
* - YUV 4:2:0 image format
* - Macro-block based coding (16x16 luma plus two 8x8 chroma)
* - 1/4 (1/8) pixel accuracy motion compensated prediction
* - 4x4 DCT transform
* - 128 level linear quantizer
* - In loop deblocking filter
* - Context-based entropy coding
*
* @{
*/
/*!\file
* \brief Provides controls common to both the AOM encoder and decoder.
*/
#ifndef AOM_AOM_AOM_H_
#define AOM_AOM_AOM_H_
#include "aom/aom_codec.h"
#include "aom/aom_image.h"
#ifdef __cplusplus
extern "C" {
#endif
/*!\brief Control functions
*
* The set of macros define the control functions of AOM interface
*/
enum aom_com_control_id {
/* TODO(https://crbug.com/aomedia/2671): The encoder overlaps the range of
* these values for its control ids, see the NOTEs in aom/aomcx.h. These
* should be migrated to something like the AOM_DECODER_CTRL_ID_START range
* next time we're ready to break the ABI.
*/
AV1_GET_REFERENCE = 128, /**< get a pointer to a reference frame,
av1_ref_frame_t* parameter */
AV1_SET_REFERENCE = 129, /**< write a frame into a reference buffer,
av1_ref_frame_t* parameter */
AV1_COPY_REFERENCE = 130, /**< get a copy of reference frame from the decoderm
av1_ref_frame_t* parameter */
AOM_COMMON_CTRL_ID_MAX,
AV1_GET_NEW_FRAME_IMAGE =
192, /**< get a pointer to the new frame, aom_image_t* parameter */
AV1_COPY_NEW_FRAME_IMAGE = 193, /**< copy the new frame to an external buffer,
aom_image_t* parameter */
AOM_DECODER_CTRL_ID_START = 256
};
/*!\brief AV1 specific reference frame data struct
*
* Define the data struct to access av1 reference frames.
*/
typedef struct av1_ref_frame {
int idx; /**< frame index to get (input) */
int use_external_ref; /**< Directly use external ref buffer(decoder only) */
aom_image_t img; /**< img structure to populate (output) */
} av1_ref_frame_t;
/*!\cond */
/*!\brief aom decoder control function parameter type
*
* Defines the data type for each of AOM decoder control function requires.
*
* \note For each control ID "X", a macro-define of
* AOM_CTRL_X is provided. It is used at compile time to determine
* if the control ID is supported by the libaom library available,
* when the libaom version cannot be controlled.
*/
AOM_CTRL_USE_TYPE(AV1_GET_REFERENCE, av1_ref_frame_t *)
#define AOM_CTRL_AV1_GET_REFERENCE
AOM_CTRL_USE_TYPE(AV1_SET_REFERENCE, av1_ref_frame_t *)
#define AOM_CTRL_AV1_SET_REFERENCE
AOM_CTRL_USE_TYPE(AV1_COPY_REFERENCE, av1_ref_frame_t *)
#define AOM_CTRL_AV1_COPY_REFERENCE
AOM_CTRL_USE_TYPE(AV1_GET_NEW_FRAME_IMAGE, aom_image_t *)
#define AOM_CTRL_AV1_GET_NEW_FRAME_IMAGE
AOM_CTRL_USE_TYPE(AV1_COPY_NEW_FRAME_IMAGE, aom_image_t *)
#define AOM_CTRL_AV1_COPY_NEW_FRAME_IMAGE
/*!\endcond */
/*! @} - end defgroup aom */
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AOM_AOM_H_
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