110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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/*!\defgroup aom AOM
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* \ingroup codecs
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* AOM is aom's newest video compression algorithm that uses motion
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* compensated prediction, Discrete Cosine Transform (DCT) coding of the
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* prediction error signal and context dependent entropy coding techniques
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* based on arithmetic principles. It features:
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* - YUV 4:2:0 image format
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* - Macro-block based coding (16x16 luma plus two 8x8 chroma)
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* - 1/4 (1/8) pixel accuracy motion compensated prediction
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* - 4x4 DCT transform
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* - 128 level linear quantizer
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* - In loop deblocking filter
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* - Context-based entropy coding
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*
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* @{
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*/
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/*!\file
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* \brief Provides controls common to both the AOM encoder and decoder.
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*/
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#ifndef AOM_AOM_AOM_H_
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#define AOM_AOM_AOM_H_
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#include "aom/aom_codec.h"
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#include "aom/aom_image.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*!\brief Control functions
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*
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* The set of macros define the control functions of AOM interface
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*/
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enum aom_com_control_id {
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/* TODO(https://crbug.com/aomedia/2671): The encoder overlaps the range of
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* these values for its control ids, see the NOTEs in aom/aomcx.h. These
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* should be migrated to something like the AOM_DECODER_CTRL_ID_START range
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* next time we're ready to break the ABI.
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*/
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AV1_GET_REFERENCE = 128, /**< get a pointer to a reference frame,
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av1_ref_frame_t* parameter */
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AV1_SET_REFERENCE = 129, /**< write a frame into a reference buffer,
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av1_ref_frame_t* parameter */
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AV1_COPY_REFERENCE = 130, /**< get a copy of reference frame from the decoderm
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av1_ref_frame_t* parameter */
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AOM_COMMON_CTRL_ID_MAX,
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AV1_GET_NEW_FRAME_IMAGE =
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192, /**< get a pointer to the new frame, aom_image_t* parameter */
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AV1_COPY_NEW_FRAME_IMAGE = 193, /**< copy the new frame to an external buffer,
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aom_image_t* parameter */
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AOM_DECODER_CTRL_ID_START = 256
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};
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/*!\brief AV1 specific reference frame data struct
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*
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* Define the data struct to access av1 reference frames.
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*/
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typedef struct av1_ref_frame {
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int idx; /**< frame index to get (input) */
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int use_external_ref; /**< Directly use external ref buffer(decoder only) */
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aom_image_t img; /**< img structure to populate (output) */
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} av1_ref_frame_t;
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/*!\cond */
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/*!\brief aom decoder control function parameter type
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*
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* Defines the data type for each of AOM decoder control function requires.
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*
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* \note For each control ID "X", a macro-define of
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* AOM_CTRL_X is provided. It is used at compile time to determine
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* if the control ID is supported by the libaom library available,
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* when the libaom version cannot be controlled.
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*/
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AOM_CTRL_USE_TYPE(AV1_GET_REFERENCE, av1_ref_frame_t *)
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#define AOM_CTRL_AV1_GET_REFERENCE
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AOM_CTRL_USE_TYPE(AV1_SET_REFERENCE, av1_ref_frame_t *)
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#define AOM_CTRL_AV1_SET_REFERENCE
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AOM_CTRL_USE_TYPE(AV1_COPY_REFERENCE, av1_ref_frame_t *)
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#define AOM_CTRL_AV1_COPY_REFERENCE
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AOM_CTRL_USE_TYPE(AV1_GET_NEW_FRAME_IMAGE, aom_image_t *)
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#define AOM_CTRL_AV1_GET_NEW_FRAME_IMAGE
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AOM_CTRL_USE_TYPE(AV1_COPY_NEW_FRAME_IMAGE, aom_image_t *)
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#define AOM_CTRL_AV1_COPY_NEW_FRAME_IMAGE
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/*!\endcond */
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/*! @} - end defgroup aom */
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AOM_AOM_AOM_H_
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