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>
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/*
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* copyright (c) 2006 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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* byte swapping routines
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*/
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#ifndef AVUTIL_BSWAP_H
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#define AVUTIL_BSWAP_H
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#include <stdint.h>
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#include "libavutil/avconfig.h"
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#include "attributes.h"
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#ifdef HAVE_AV_CONFIG_H
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#include "config.h"
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#if ARCH_AARCH64
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# include "aarch64/bswap.h"
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#elif ARCH_ARM
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# include "arm/bswap.h"
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#elif ARCH_AVR32
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# include "avr32/bswap.h"
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#elif ARCH_SH4
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# include "sh4/bswap.h"
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#elif ARCH_X86
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# include "x86/bswap.h"
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#endif
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#endif /* HAVE_AV_CONFIG_H */
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#define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff))
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#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))
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#define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32))
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#define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)
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#ifndef av_bswap16
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static av_always_inline av_const uint16_t av_bswap16(uint16_t x)
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{
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x= (x>>8) | (x<<8);
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return x;
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}
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#endif
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#ifndef av_bswap32
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static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
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{
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return AV_BSWAP32C(x);
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}
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#endif
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#ifndef av_bswap64
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static inline uint64_t av_const av_bswap64(uint64_t x)
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{
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return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32);
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}
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#endif
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// be2ne ... big-endian to native-endian
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// le2ne ... little-endian to native-endian
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#if AV_HAVE_BIGENDIAN
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#define av_be2ne16(x) (x)
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#define av_be2ne32(x) (x)
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#define av_be2ne64(x) (x)
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#define av_le2ne16(x) av_bswap16(x)
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#define av_le2ne32(x) av_bswap32(x)
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#define av_le2ne64(x) av_bswap64(x)
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#define AV_BE2NEC(s, x) (x)
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#define AV_LE2NEC(s, x) AV_BSWAPC(s, x)
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#else
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#define av_be2ne16(x) av_bswap16(x)
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#define av_be2ne32(x) av_bswap32(x)
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#define av_be2ne64(x) av_bswap64(x)
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#define av_le2ne16(x) (x)
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#define av_le2ne32(x) (x)
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#define av_le2ne64(x) (x)
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#define AV_BE2NEC(s, x) AV_BSWAPC(s, x)
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#define AV_LE2NEC(s, x) (x)
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#endif
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#define AV_BE2NE16C(x) AV_BE2NEC(16, x)
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#define AV_BE2NE32C(x) AV_BE2NEC(32, x)
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#define AV_BE2NE64C(x) AV_BE2NEC(64, x)
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#define AV_LE2NE16C(x) AV_LE2NEC(16, x)
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#define AV_LE2NE32C(x) AV_LE2NEC(32, x)
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#define AV_LE2NE64C(x) AV_LE2NEC(64, x)
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#endif /* AVUTIL_BSWAP_H */
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