mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-11-02 04:21:41 +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>
88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
/*
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* Copyright (C) 2012 Ronald S. Bultje
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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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* Core video DSP helper functions
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*/
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#ifndef AVCODEC_VIDEODSP_H
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#define AVCODEC_VIDEODSP_H
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#include <stddef.h>
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#include <stdint.h>
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#define EMULATED_EDGE(depth) \
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void ff_emulated_edge_mc_ ## depth(uint8_t *dst, const uint8_t *src, \
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ptrdiff_t dst_stride, ptrdiff_t src_stride, \
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int block_w, int block_h,\
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int src_x, int src_y, int w, int h);
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EMULATED_EDGE(8)
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EMULATED_EDGE(16)
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typedef struct VideoDSPContext {
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/**
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* Copy a rectangular area of samples to a temporary buffer and replicate
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* the border samples.
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*
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* @param dst destination buffer
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* @param dst_stride number of bytes between 2 vertically adjacent samples
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* in destination buffer
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* @param src source buffer
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* @param dst_linesize number of bytes between 2 vertically adjacent
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* samples in the destination buffer
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* @param src_linesize number of bytes between 2 vertically adjacent
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* samples in both the source buffer
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* @param block_w width of block
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* @param block_h height of block
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* @param src_x x coordinate of the top left sample of the block in the
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* source buffer
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* @param src_y y coordinate of the top left sample of the block in the
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* source buffer
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* @param w width of the source buffer
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* @param h height of the source buffer
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*/
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void (*emulated_edge_mc)(uint8_t *dst, const uint8_t *src,
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ptrdiff_t dst_linesize,
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ptrdiff_t src_linesize,
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int block_w, int block_h,
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int src_x, int src_y, int w, int h);
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/**
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* Prefetch memory into cache (if supported by hardware).
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*
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* @param buf pointer to buffer to prefetch memory from
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* @param stride distance between two lines of buf (in bytes)
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* @param h number of lines to prefetch
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*/
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void (*prefetch)(uint8_t *buf, ptrdiff_t stride, int h);
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} VideoDSPContext;
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void ff_videodsp_init(VideoDSPContext *ctx, int bpc);
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/* for internal use only (i.e. called by ff_videodsp_init() */
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void ff_videodsp_init_aarch64(VideoDSPContext *ctx, int bpc);
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void ff_videodsp_init_arm(VideoDSPContext *ctx, int bpc);
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void ff_videodsp_init_ppc(VideoDSPContext *ctx, int bpc);
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void ff_videodsp_init_x86(VideoDSPContext *ctx, int bpc);
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#endif /* AVCODEC_VIDEODSP_H */
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