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| -rw-r--r-- | third_party/aom/av1/encoder/encode_strategy.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/encode_strategy.h b/third_party/aom/av1/encoder/encode_strategy.h new file mode 100644 index 0000000000..c1d14d134c --- /dev/null +++ b/third_party/aom/av1/encoder/encode_strategy.h @@ -0,0 +1,138 @@ +/* + * 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. + */ + +/*!\file + * \brief Declares frame encoding functions. + */ +#ifndef AOM_AV1_ENCODER_ENCODE_STRATEGY_H_ +#define AOM_AV1_ENCODER_ENCODE_STRATEGY_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#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 FRAME_UPDATE_TYPE type, + 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 || + ext_refresh_frame_flags->last_frame); + else + 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: + 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" +#endif + +#endif // AOM_AV1_ENCODER_ENCODE_STRATEGY_H_ |