AOMedia AV1 Codec
encode_strategy.h
Go to the documentation of this file.
1/*
2 * Copyright (c) 2019, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
15#ifndef AOM_AV1_ENCODER_ENCODE_STRATEGY_H_
16#define AOM_AV1_ENCODER_ENCODE_STRATEGY_H_
17
18#ifdef __cplusplus
19extern "C" {
20#endif
21
22#include <stdint.h>
23
24#include "aom/aom_encoder.h"
25
26#include "av1/encoder/encoder.h"
27#include "av1/encoder/firstpass.h"
28
55int av1_encode_strategy(AV1_COMP *const cpi, size_t *const size,
56 uint8_t *const dest, unsigned int *frame_flags,
57 int64_t *const time_stamp, int64_t *const time_end,
58 const aom_rational64_t *const timestamp_ratio,
59 int *const pop_lookahead, int flush);
60
62// Set individual buffer update flags based on frame reference type.
63// force_refresh_all is used when we have a KEY_FRAME or S_FRAME. It forces all
64// refresh_*_frame flags to be set, because we refresh all buffers in this case.
65void av1_configure_buffer_updates(AV1_COMP *const cpi,
66 RefreshFrameInfo *const refresh_frame,
67 const FRAME_UPDATE_TYPE type,
68 const REFBUF_STATE refbuf_state,
69 int force_refresh_all);
70
71int av1_get_refresh_frame_flags(
72 const AV1_COMP *const cpi, const EncodeFrameParams *const frame_params,
73 FRAME_UPDATE_TYPE frame_update_type, int gf_index, int cur_disp_order,
74 RefFrameMapPair ref_frame_map_pairs[REF_FRAMES]);
75
76int av1_get_refresh_ref_frame_map(int refresh_frame_flags);
77
88void av1_get_ref_frames(RefFrameMapPair ref_frame_map_pairs[REF_FRAMES],
89 int cur_frame_disp,
90#if CONFIG_FRAME_PARALLEL_ENCODE_2
91 const AV1_COMP *cpi, int gf_index,
92 int is_parallel_encode,
93#endif // CONFIG_FRAME_PARALLEL_ENCODE_2
94 int remapped_ref_idx[REF_FRAMES]);
95
96int is_forced_keyframe_pending(struct lookahead_ctx *lookahead,
97 const int up_to_index,
98 const COMPRESSOR_STAGE compressor_stage);
99
100static AOM_INLINE int is_frame_droppable(
101 const SVC *const svc,
102 const ExtRefreshFrameFlagsInfo *const ext_refresh_frame_flags) {
103 // Droppable frame is only used by external refresh flags. VoD setting won't
104 // trigger its use case.
105 if (svc->set_ref_frame_config)
106 return svc->non_reference_frame;
107 else if (ext_refresh_frame_flags->update_pending)
108 return !(ext_refresh_frame_flags->alt_ref_frame ||
109 ext_refresh_frame_flags->alt2_ref_frame ||
110 ext_refresh_frame_flags->bwd_ref_frame ||
111 ext_refresh_frame_flags->golden_frame ||
112 ext_refresh_frame_flags->last_frame);
113 else
114 return 0;
115}
116
117static AOM_INLINE int get_current_frame_ref_type(const AV1_COMP *const cpi) {
118 // We choose the reference "type" of this frame from the flags which indicate
119 // which reference frames will be refreshed by it. More than one of these
120 // flags may be set, so the order here implies an order of precedence. This is
121 // just used to choose the primary_ref_frame (as the most recent reference
122 // buffer of the same reference-type as the current frame).
123
124 switch (cpi->ppi->gf_group.layer_depth[cpi->gf_frame_index]) {
125 case 0: return 0;
126 case 1: return 1;
127 case MAX_ARF_LAYERS:
128 case MAX_ARF_LAYERS + 1: return 4;
129 default: return 7;
130 }
131}
132
133#if CONFIG_FRAME_PARALLEL_ENCODE
134#if CONFIG_FRAME_PARALLEL_ENCODE_2
135int av1_calc_refresh_idx_for_intnl_arf(
136 AV1_COMP *cpi, RefFrameMapPair ref_frame_map_pairs[REF_FRAMES],
137 int gf_index);
138#endif // CONFIG_FRAME_PARALLEL_ENCODE_2
139#endif // CONFIG_FRAME_PARALLEL_ENCODE
141#ifdef __cplusplus
142} // extern "C"
143#endif
144
145#endif // AOM_AV1_ENCODER_ENCODE_STRATEGY_H_
Describes the encoder algorithm interface to applications.
Declares top-level encoder structures and functions.
int av1_encode_strategy(AV1_COMP *const cpi, size_t *const size, uint8_t *const dest, unsigned int *frame_flags, int64_t *const time_stamp, int64_t *const time_end, const aom_rational64_t *const timestamp_ratio, int *const pop_lookahead, int flush)
Implement high-level encode strategy.
The stucture of SVC.
Definition: svc_layercontext.h:87