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https://github.com/mpv-player/mpv
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a009d56d4d
MPlayer used to depend on having an FFmpeg tree available at build time to provide this code, and FFmpeg changes occasionally broke the MPlayer build as a result. Some of the relevant functionality also depends on FFmpeg library symbols that are not part of the FFmpeg API, meaning that library changes could break MPlayer after the build. Add a copy of the relevant functionality to the MPlayer tree and use that instead. The added files are: - The headers bswap.h, intreadwrite.h and x86_cpu.h from libavutil. Some MPlayer code uses the functionality defined as macros and static inline functions in these headers. - Architecture-specific internal files used by the above headers. These are in the subdirectories: x86/, arm/, bfin/, sh4/. - taglists.[ch], which provides the codec tables from libavformat/riff.c and two functions to access them from libavformat/utils.c. Most of the headers are copied from FFmpeg revision 19452 with only the include guard names changed. A "common.h" include in bswap.h was changed to "libavutil/common.h" as it should use the installed header. Taglists.c contains snippets from the relevant files with some changes like renamed identifiers.
79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
/*
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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 MP_AVUTIL_ARM_INTREADWRITE_H
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#define MP_AVUTIL_ARM_INTREADWRITE_H
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#include <stdint.h>
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#include "config.h"
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#if HAVE_FAST_UNALIGNED && HAVE_INLINE_ASM
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#define AV_RN16 AV_RN16
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static inline uint16_t AV_RN16(const void *p)
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{
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uint16_t v;
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__asm__ ("ldrh %0, %1" : "=r"(v) : "m"(*(const uint16_t *)p));
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return v;
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}
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#define AV_WN16 AV_WN16
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static inline void AV_WN16(void *p, uint16_t v)
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{
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__asm__ ("strh %1, %0" : "=m"(*(uint16_t *)p) : "r"(v));
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}
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#define AV_RN32 AV_RN32
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static inline uint32_t AV_RN32(const void *p)
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{
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uint32_t v;
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__asm__ ("ldr %0, %1" : "=r"(v) : "m"(*(const uint32_t *)p));
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return v;
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}
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#define AV_WN32 AV_WN32
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static inline void AV_WN32(void *p, uint32_t v)
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{
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__asm__ ("str %1, %0" : "=m"(*(uint32_t *)p) : "r"(v));
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}
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#define AV_RN64 AV_RN64
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static inline uint64_t AV_RN64(const void *p)
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{
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union { uint64_t v; uint32_t hl[2]; } v;
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__asm__ ("ldr %0, %2 \n\t"
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"ldr %1, %3 \n\t"
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: "=r"(v.hl[0]), "=r"(v.hl[1])
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: "m"(*(const uint32_t*)p), "m"(*((const uint32_t*)p+1)));
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return v.v;
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}
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#define AV_WN64 AV_WN64
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static inline void AV_WN64(void *p, uint64_t v)
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{
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union { uint64_t v; uint32_t hl[2]; } vv = { v };
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__asm__ ("str %2, %0 \n\t"
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"str %3, %1 \n\t"
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: "=m"(*(uint32_t*)p), "=m"(*((uint32_t*)p+1))
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: "r"(vv.hl[0]), "r"(vv.hl[1]));
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}
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#endif /* HAVE_INLINE_ASM */
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#endif /* AVUTIL_ARM_INTREADWRITE_H */
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