mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-11-02 12:32:03 +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>
127 lines
4.6 KiB
C
127 lines
4.6 KiB
C
/*
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* H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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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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/**
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* @file
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* H.264 / AVC / MPEG4 prediction functions.
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#ifndef AVCODEC_H264PRED_H
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#define AVCODEC_H264PRED_H
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#include <stddef.h>
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#include <stdint.h>
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/**
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* Prediction types
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*/
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//@{
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#define VERT_PRED 0
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#define HOR_PRED 1
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#define DC_PRED 2
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#define DIAG_DOWN_LEFT_PRED 3
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#define DIAG_DOWN_RIGHT_PRED 4
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#define VERT_RIGHT_PRED 5
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#define HOR_DOWN_PRED 6
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#define VERT_LEFT_PRED 7
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#define HOR_UP_PRED 8
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// DC edge (not for VP8)
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#define LEFT_DC_PRED 9
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#define TOP_DC_PRED 10
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#define DC_128_PRED 11
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// RV40 specific
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#define DIAG_DOWN_LEFT_PRED_RV40_NODOWN 12
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#define HOR_UP_PRED_RV40_NODOWN 13
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#define VERT_LEFT_PRED_RV40_NODOWN 14
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// VP8 specific
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#define TM_VP8_PRED 9 ///< "True Motion", used instead of plane
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#define VERT_VP8_PRED 10 ///< for VP8, #VERT_PRED is the average of
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///< (left col+cur col x2+right col) / 4;
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///< this is the "unaveraged" one
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#define HOR_VP8_PRED 14 ///< unaveraged version of #HOR_PRED, see
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///< #VERT_VP8_PRED for details
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#define DC_127_PRED 12
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#define DC_129_PRED 13
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#define DC_PRED8x8 0
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#define HOR_PRED8x8 1
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#define VERT_PRED8x8 2
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#define PLANE_PRED8x8 3
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// DC edge
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#define LEFT_DC_PRED8x8 4
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#define TOP_DC_PRED8x8 5
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#define DC_128_PRED8x8 6
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// H264/SVQ3 (8x8) specific
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#define ALZHEIMER_DC_L0T_PRED8x8 7
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#define ALZHEIMER_DC_0LT_PRED8x8 8
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#define ALZHEIMER_DC_L00_PRED8x8 9
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#define ALZHEIMER_DC_0L0_PRED8x8 10
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// VP8 specific
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#define DC_127_PRED8x8 7
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#define DC_129_PRED8x8 8
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//@}
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/**
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* Context for storing H.264 prediction functions
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*/
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typedef struct H264PredContext {
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void(*pred4x4[9 + 3 + 3])(uint8_t *src, const uint8_t *topright,
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ptrdiff_t stride);
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void(*pred8x8l[9 + 3])(uint8_t *src, int topleft, int topright,
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ptrdiff_t stride);
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void(*pred8x8[4 + 3 + 4])(uint8_t *src, ptrdiff_t stride);
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void(*pred16x16[4 + 3 + 2])(uint8_t *src, ptrdiff_t stride);
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void(*pred4x4_add[2])(uint8_t *pix /*align 4*/,
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int16_t *block /*align 16*/, ptrdiff_t stride);
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void(*pred8x8l_add[2])(uint8_t *pix /*align 8*/,
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int16_t *block /*align 16*/, ptrdiff_t stride);
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void(*pred8x8l_filter_add[2])(uint8_t *pix /*align 8*/,
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int16_t *block /*align 16*/, int topleft, int topright, ptrdiff_t stride);
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void(*pred8x8_add[3])(uint8_t *pix /*align 8*/,
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const int *block_offset,
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int16_t *block /*align 16*/, ptrdiff_t stride);
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void(*pred16x16_add[3])(uint8_t *pix /*align 16*/,
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const int *block_offset,
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int16_t *block /*align 16*/, ptrdiff_t stride);
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} H264PredContext;
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void ff_h264_pred_init(H264PredContext *h, int codec_id,
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const int bit_depth, const int chroma_format_idc);
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void ff_h264_pred_init_aarch64(H264PredContext *h, int codec_id,
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const int bit_depth,
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const int chroma_format_idc);
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void ff_h264_pred_init_arm(H264PredContext *h, int codec_id,
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const int bit_depth, const int chroma_format_idc);
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void ff_h264_pred_init_x86(H264PredContext *h, int codec_id,
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const int bit_depth, const int chroma_format_idc);
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void ff_h264_pred_init_mips(H264PredContext *h, int codec_id,
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const int bit_depth, const int chroma_format_idc);
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#endif /* AVCODEC_H264PRED_H */
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