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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.
*/
#ifndef AOM_AV1_ENCODER_GOP_STRUCTURE_H_
#define AOM_AV1_ENCODER_GOP_STRUCTURE_H_
#include "av1/common/av1_common_int.h"
#include "av1/encoder/ratectrl.h"
#ifdef __cplusplus
extern "C" {
#endif
/*!\cond */
struct AV1_COMP;
struct EncodeFrameParams;
#define MIN_ARF_GF_BOOST 240
#define NORMAL_BOOST 100
/*!\endcond */
/*!\brief Set up the Group-Of-Pictures structure for this GF_GROUP.
*
*\ingroup rate_control
*
* This function defines the Group-Of-Pictures structure for this GF_GROUP.
* This involves deciding where to place the various FRAME_UPDATE_TYPEs in
* the group. It does this primarily by updateing entries in
* cpi->twopass.gf_group.update_type[].
*
* \param[in] cpi Top - level encoder instance structure
*
* \remark No return value but this function updates group data structures.
*/
void av1_gop_setup_structure(struct AV1_COMP *cpi);
/*!\brief Distributes bits to frames in a group
*
*\ingroup rate_control
*
* This function decides on the allocation of bits between the different
* frames and types of frame in a GF/ARF group.
*
* \param[in] cpi Top - level encoder instance structure
* \param[in] rc Rate control data
* \param[in] gf_group GF/ARF group data structure
* \param[in] is_key_frame Indicates if the first frame in the group is
* also a key frame.
* \param[in] use_arf Are ARF frames enabled or is this a GF only
* uni-directional group.
* \param[in] gf_group_bits Bits available to be allocated.
*
* \remark No return but updates the rate control and group data structures
* to reflect the allocation of bits.
*/
void av1_gop_bit_allocation(const AV1_COMP *cpi, RATE_CONTROL *const rc,
GF_GROUP *gf_group, int is_key_frame, int use_arf,
int64_t gf_group_bits);
/*!\brief Check whether a frame in the GOP is a forward key frame
*
*\ingroup rate_control
*
* \param[in] gf_group GF/ARF group data structure
* \param[in] gf_frame_index GOP index
*
* \return Return 1 if it is a forward key frame, otherwise return 0
*/
int av1_gop_check_forward_keyframe(const GF_GROUP *gf_group,
int gf_frame_index);
/*!\brief Check whether a frame in the GOP is the second arf
*
*\ingroup rate_control
*
* \param[in] gf_group GF/ARF group data structure
* \param[in] gf_frame_index GOP index
*
* \return Return 1 if it is the second arf
*/
int av1_gop_is_second_arf(const GF_GROUP *gf_group, int gf_frame_index);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_ENCODER_GOP_STRUCTURE_H_
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