/* * 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_
/*!\brief Control functions * * The set of macros define the control functions of AOM interface * The range for common control IDs is 230-255(max).
*/ enum aom_com_control_id { /*!\brief Codec control function to get a pointer to a reference frame * * av1_ref_frame_t* parameter
*/
AV1_GET_REFERENCE = 230,
/*!\brief Codec control function to write a frame into a reference buffer * * av1_ref_frame_t* parameter
*/
AV1_SET_REFERENCE = 231,
/*!\brief Codec control function to get a copy of reference frame from the * decoder * * av1_ref_frame_t* parameter
*/
AV1_COPY_REFERENCE = 232,
/*!\brief Codec control function to get a pointer to the new frame * * aom_image_t* parameter
*/
AV1_GET_NEW_FRAME_IMAGE = 233,
/*!\brief Codec control function to copy the new frame to an external buffer * * aom_image_t* parameter
*/
AV1_COPY_NEW_FRAME_IMAGE = 234,
/*!\brief Start point of control IDs for aom_dec_control_id. * Any new common control IDs should be added above.
*/
AOM_DECODER_CTRL_ID_START = 256 // No common control IDs should be added after AOM_DECODER_CTRL_ID_START.
};
/*!\brief AV1 specific reference frame data struct * * Define the data struct to access av1 reference frames.
*/ typedefstruct 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
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