mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-11-01 12:07:31 +01:00
Henrik RydgårdandClaude Opus 5.5
d0e3141f43
The ffmpeg submodule held prebuilt libraries for every platform next to the sources (about 1.5 GB checked out), and nothing uses those any more. Only the needed sources are copied in, from the submodule's commit, along with every header and template they include. The path is new, so checking out commits on either side of this works. It's also cut down to what PPSSPP uses: the H.264, AAC, MP3, ATRAC3 and ATRAC3+ decoders, the H.264 parser, the demuxers as before, and the FFV1 encoder, AVI muxer and file protocol for AVI dumping. config.h takes its CONFIG_ values from FFmpeg 3.0.2's own configure run with just those enabled. The raw H.264 demuxer stays even though nothing opens raw H.264: probing PSMF data uses it to identify the video stream's codec, which otherwise comes out as none. On top of that: - The files nothing links (configure would build them, but they're never pulled out of the static library, going by the GCC link map) are left out: mostly libavutil's crypto and hashing and the alternative DCT/IDCT/FFT versions. - libswresample isn't built, now that nothing uses it. - The H.264 decoder only does 8-bit video, which is all the PSP has. The SPS parser rejects any other bit depth, and the DSP files no longer build their 9- to 16-bit variants, which the linker kept because the init functions pick one by bit depth at run time. That's 160 files to compile instead of 277, and 391 of FFmpeg's vendored, about 5.8 MB. The README in ext/ffmpeg has what was done, the PPSSPP patches in the copy, how to add a component, and the tradeoffs. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/*
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* Motion estimation
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_MOTION_EST_H
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#define AVCODEC_MOTION_EST_H
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#include <stdint.h>
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#include "avcodec.h"
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#include "hpeldsp.h"
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#include "qpeldsp.h"
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struct MpegEncContext;
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#if ARCH_IA64 // Limit static arrays to avoid gcc failing "short data segment overflowed"
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#define MAX_MV 1024
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#else
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#define MAX_MV 4096
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#endif
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#define MAX_DMV (2*MAX_MV)
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#define ME_MAP_SIZE 64
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#define FF_ME_ZERO 0
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#define FF_ME_EPZS 1
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#define FF_ME_XONE 2
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/**
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* Motion estimation context.
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*/
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typedef struct MotionEstContext {
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AVCodecContext *avctx;
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int skip; ///< set if ME is skipped for the current MB
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int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
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int direct_basis_mv[4][2];
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uint8_t *scratchpad; /**< data area for the ME algo, so that
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* the ME does not need to malloc/free. */
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uint8_t *best_mb;
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uint8_t *temp_mb[2];
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uint8_t *temp;
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int best_bits;
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uint32_t *map; ///< map to avoid duplicate evaluations
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uint32_t *score_map; ///< map to store the scores
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unsigned map_generation;
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int pre_penalty_factor;
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int penalty_factor; /**< an estimate of the bits required to
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* code a given mv value, e.g. (1,0) takes
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* more bits than (0,0). We have to
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* estimate whether any reduction in
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* residual is worth the extra bits. */
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int sub_penalty_factor;
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int mb_penalty_factor;
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int flags;
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int sub_flags;
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int mb_flags;
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int pre_pass; ///< = 1 for the pre pass
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int dia_size;
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int xmin;
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int xmax;
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int ymin;
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int ymax;
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int pred_x;
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int pred_y;
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uint8_t *src[4][4];
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uint8_t *ref[4][4];
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int stride;
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int uvstride;
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/* temp variables for picture complexity calculation */
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int64_t mc_mb_var_sum_temp;
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int64_t mb_var_sum_temp;
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int scene_change_score;
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op_pixels_func(*hpel_put)[4];
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op_pixels_func(*hpel_avg)[4];
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qpel_mc_func(*qpel_put)[16];
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qpel_mc_func(*qpel_avg)[16];
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uint8_t (*mv_penalty)[MAX_DMV * 2 + 1]; ///< bit amount needed to encode a MV
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uint8_t *current_mv_penalty;
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int (*sub_motion_search)(struct MpegEncContext *s,
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int *mx_ptr, int *my_ptr, int dmin,
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int src_index, int ref_index,
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int size, int h);
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} MotionEstContext;
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static inline int ff_h263_round_chroma(int x)
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{
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//FIXME static or not?
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static const uint8_t h263_chroma_roundtab[16] = {
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// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
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0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
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};
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return h263_chroma_roundtab[x & 0xf] + (x >> 3);
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}
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int ff_init_me(struct MpegEncContext *s);
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void ff_estimate_p_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y);
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void ff_estimate_b_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y);
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int ff_pre_estimate_p_frame_motion(struct MpegEncContext *s,
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int mb_x, int mb_y);
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int ff_epzs_motion_search(struct MpegEncContext *s, int *mx_ptr, int *my_ptr,
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int P[10][2], int src_index, int ref_index,
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int16_t (*last_mv)[2], int ref_mv_scale, int size,
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int h);
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int ff_get_mb_score(struct MpegEncContext *s, int mx, int my, int src_index,
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int ref_index, int size, int h, int add_rate);
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int ff_get_best_fcode(struct MpegEncContext *s,
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int16_t (*mv_table)[2], int type);
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void ff_fix_long_p_mvs(struct MpegEncContext *s);
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void ff_fix_long_mvs(struct MpegEncContext *s, uint8_t *field_select_table,
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int field_select, int16_t (*mv_table)[2], int f_code,
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int type, int truncate);
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#endif /* AVCODEC_MOTION_EST_H */
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