| /* |
| * 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_PASS2_STRATEGY_H_ |
| #define AOM_AV1_ENCODER_PASS2_STRATEGY_H_ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| struct AV1_COMP; |
| struct EncodeFrameParams; |
| |
| /*!\endcond */ |
| /*! |
| * \brief accumulated stats and features in a gf group |
| */ |
| typedef struct { |
| /*!\cond */ |
| double gf_group_err; |
| double gf_group_raw_error; |
| double gf_group_skip_pct; |
| double gf_group_inactive_zone_rows; |
| |
| double mv_ratio_accumulator; |
| double decay_accumulator; |
| double zero_motion_accumulator; |
| double loop_decay_rate; |
| double last_loop_decay_rate; |
| double this_frame_mv_in_out; |
| double mv_in_out_accumulator; |
| double abs_mv_in_out_accumulator; |
| |
| double avg_sr_coded_error; |
| double avg_tr_coded_error; |
| double avg_pcnt_second_ref; |
| double avg_pcnt_third_ref; |
| double avg_pcnt_third_ref_nolast; |
| double avg_new_mv_count; |
| double avg_wavelet_energy; |
| double avg_raw_err_stdev; |
| int non_zero_stdev_count; |
| /*!\endcond */ |
| } GF_GROUP_STATS; |
| |
| /*! |
| * \brief accumulated stats and features for a frame |
| */ |
| typedef struct { |
| /*!\cond */ |
| double frame_err; |
| double frame_coded_error; |
| double frame_sr_coded_error; |
| double frame_tr_coded_error; |
| /*!\endcond */ |
| } GF_FRAME_STATS; |
| /*!cond */ |
| |
| void av1_init_second_pass(struct AV1_COMP *cpi); |
| |
| void av1_init_single_pass_lap(AV1_COMP *cpi); |
| |
| /*!\endcond */ |
| /*!\brief Main per frame entry point for second pass of two pass encode |
| * |
| *\ingroup rate_control |
| * |
| * This function is called for each frame in the second pass of a two pass |
| * encode. It checks the frame type and if a new KF or GF/ARF is due. |
| * When a KF is due it calls find_next_key_frame() to work out how long |
| * this key frame group will be and assign bits to the key frame. |
| * At the start of a new GF/ARF group it calls calculate_gf_length() |
| * and define_gf_group() which are the main functions responsible for |
| * defining the size and structure of the new GF/ARF group. |
| * |
| * \param[in] cpi Top - level encoder instance structure |
| * \param[in] frame_params Per frame encoding parameters |
| * \param[in] frame_input Current and last input frame buffers |
| * \param[in] frame_flags Frame type and coding flags |
| * |
| * \return No return but analyses first pass stats and assigns a target |
| * number of bits to the current frame and a target Q range. |
| */ |
| void av1_get_second_pass_params(struct AV1_COMP *cpi, |
| struct EncodeFrameParams *const frame_params, |
| const EncodeFrameInput *const frame_input, |
| unsigned int frame_flags); |
| |
| /*!\brief Adjustments to two pass and rate control after each frame. |
| * |
| *\ingroup rate_control |
| * |
| * This function is called after each frame to make adjustments to |
| * heuristics and data structures that relate to rate control. |
| * |
| * \param[in] cpi Top - level encoder instance structure |
| * |
| * \return No return value but this function updates various rate control |
| * related data structures that for example track overshoot and |
| * undershoot. |
| */ |
| void av1_twopass_postencode_update(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. |
| * |
| * \return 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); |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AOM_AV1_ENCODER_PASS2_STRATEGY_H_ |