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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 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
* \brief Declares frame encoding functions.
#ifdef __cplusplus
extern "C" {
#include <stdint.h>
#include "aom/aom_encoder.h"
#include "av1/encoder/encoder.h"
#include "av1/encoder/firstpass.h"
/*!\brief Implement high-level encode strategy
* \ingroup high_level_algo
* \callgraph
* \callergraph
* This function will implement high-level encode strategy, choosing frame type,
* frame placement, etc. It populates an EncodeFrameParams struct with the
* results of these decisions and then encodes the frame. The caller should use
* the output parameters *time_stamp and *time_end only when this function
* returns AOM_CODEC_OK.
* \param[in] cpi Top-level encoder structure
* \param[in] size Bitstream size
* \param[in] dest Bitstream output
* \param[in] frame_flags Flags to decide how to encoding the frame
* \param[out] time_stamp Time stamp of the frame
* \param[out] time_end Time end
* \param[in] timestamp_ratio Time base
* \param[in] pop_lookahead Decide to pop the source frame from queue
* \param[in] flush Decide to encode one frame or the rest of frames
* \return Returns a value to indicate if the encoding is done successfully.
* \retval #AOM_CODEC_OK
* \retval -1
* \retval #AOM_CODEC_ERROR
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);
/*!\cond */
// Set individual buffer update flags based on frame reference type.
// force_refresh_all is used when we have a KEY_FRAME or S_FRAME. It forces all
// refresh_*_frame flags to be set, because we refresh all buffers in this case.
void av1_configure_buffer_updates(AV1_COMP *const cpi,
RefreshFrameInfo *const refresh_frame,
const REFBUF_STATE refbuf_state,
int force_refresh_all);
int av1_get_refresh_frame_flags(
const AV1_COMP *const cpi, const EncodeFrameParams *const frame_params,
FRAME_UPDATE_TYPE frame_update_type, int gf_index, int cur_disp_order,
RefFrameMapPair ref_frame_map_pairs[REF_FRAMES]);
int av1_get_refresh_ref_frame_map(int refresh_frame_flags);
/*!\brief Obtain indices of reference frames in ref_frame_map
* \callgraph
* \callergraph
* \param[out] remapped_ref_idx An array for storing indices of reference
* frames. The index is used to retrieve a
* reference frame buffer from ref_frame_map
* in AV1Common.
void av1_get_ref_frames(RefFrameMapPair ref_frame_map_pairs[REF_FRAMES],
int cur_frame_disp, const AV1_COMP *cpi, int gf_index,
int is_parallel_encode,
int remapped_ref_idx[REF_FRAMES]);
int is_forced_keyframe_pending(struct lookahead_ctx *lookahead,
const int up_to_index,
const COMPRESSOR_STAGE compressor_stage);
static AOM_INLINE int is_frame_droppable(
const RTC_REF *const rtc_ref,
const ExtRefreshFrameFlagsInfo *const ext_refresh_frame_flags) {
// Droppable frame is only used by external refresh flags. VoD setting won't
// trigger its use case.
if (rtc_ref->set_ref_frame_config)
return rtc_ref->non_reference_frame;
else if (ext_refresh_frame_flags->update_pending)
return !(ext_refresh_frame_flags->alt_ref_frame ||
ext_refresh_frame_flags->alt2_ref_frame ||
ext_refresh_frame_flags->bwd_ref_frame ||
ext_refresh_frame_flags->golden_frame ||
return 0;
static AOM_INLINE int get_current_frame_ref_type(const AV1_COMP *const cpi) {
// We choose the reference "type" of this frame from the flags which indicate
// which reference frames will be refreshed by it. More than one of these
// flags may be set, so the order here implies an order of precedence. This is
// just used to choose the primary_ref_frame (as the most recent reference
// buffer of the same reference-type as the current frame).
switch (cpi->ppi->gf_group.layer_depth[cpi->gf_frame_index]) {
case 0: return 0;
case 1: return 1;
case MAX_ARF_LAYERS + 1: return 4;
default: return 7;
int av1_calc_refresh_idx_for_intnl_arf(
AV1_COMP *cpi, RefFrameMapPair ref_frame_map_pairs[REF_FRAMES],
int gf_index);
/*!\endcond */
#ifdef __cplusplus
} // extern "C"