/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVUTIL_INTREADWRITE_H #define AVUTIL_INTREADWRITE_H #include <stdint.h> #include "libavutil/avconfig.h" #include "attributes.h" #include "bswap.h" av_alias64; av_alias32; av_alias16; /* * Arch-specific headers can provide any combination of * AV_[RW][BLN](16|24|32|48|64) and AV_(COPY|SWAP|ZERO)(64|128) macros. * Preprocessor symbols must be defined, even if these are implemented * as inline functions. * * R/W means read/write, B/L/N means big/little/native endianness. * The following macros require aligned access, compared to their * unaligned variants: AV_(COPY|SWAP|ZERO)(64|128), AV_[RW]N[8-64]A. * Incorrect usage may range from abysmal performance to crash * depending on the platform. * * The unaligned variants are AV_[RW][BLN][8-64] and AV_COPY*U. */ #ifdef HAVE_AV_CONFIG_H #include "config.h" #if ARCH_ARM # include "arm/intreadwrite.h" #elif ARCH_AVR32 # include "avr32/intreadwrite.h" #elif ARCH_MIPS # include "mips/intreadwrite.h" #elif ARCH_PPC # include "ppc/intreadwrite.h" #elif ARCH_X86 # include "x86/intreadwrite.h" #endif #endif /* HAVE_AV_CONFIG_H */ /* * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers. */ #if AV_HAVE_BIGENDIAN # if defined(AV_RN16) && !defined(AV_RB16) #define AV_RB16 … # elif !defined(AV_RN16) && defined(AV_RB16) #define AV_RN16 … # endif # if defined(AV_WN16) && !defined(AV_WB16) #define AV_WB16 … # elif !defined(AV_WN16) && defined(AV_WB16) #define AV_WN16 … # endif # if defined(AV_RN24) && !defined(AV_RB24) #define AV_RB24 … # elif !defined(AV_RN24) && defined(AV_RB24) #define AV_RN24 … # endif # if defined(AV_WN24) && !defined(AV_WB24) #define AV_WB24 … # elif !defined(AV_WN24) && defined(AV_WB24) #define AV_WN24 … # endif # if defined(AV_RN32) && !defined(AV_RB32) #define AV_RB32 … # elif !defined(AV_RN32) && defined(AV_RB32) #define AV_RN32 … # endif # if defined(AV_WN32) && !defined(AV_WB32) #define AV_WB32 … # elif !defined(AV_WN32) && defined(AV_WB32) #define AV_WN32 … # endif # if defined(AV_RN48) && !defined(AV_RB48) #define AV_RB48 … # elif !defined(AV_RN48) && defined(AV_RB48) #define AV_RN48 … # endif # if defined(AV_WN48) && !defined(AV_WB48) #define AV_WB48 … # elif !defined(AV_WN48) && defined(AV_WB48) #define AV_WN48 … # endif # if defined(AV_RN64) && !defined(AV_RB64) #define AV_RB64 … # elif !defined(AV_RN64) && defined(AV_RB64) #define AV_RN64 … # endif # if defined(AV_WN64) && !defined(AV_WB64) #define AV_WB64 … # elif !defined(AV_WN64) && defined(AV_WB64) #define AV_WN64 … # endif #else /* AV_HAVE_BIGENDIAN */ # if defined(AV_RN16) && !defined(AV_RL16) #define AV_RL16 … # elif !defined(AV_RN16) && defined(AV_RL16) #define AV_RN16 … # endif # if defined(AV_WN16) && !defined(AV_WL16) #define AV_WL16 … # elif !defined(AV_WN16) && defined(AV_WL16) #define AV_WN16 … # endif # if defined(AV_RN24) && !defined(AV_RL24) #define AV_RL24 … # elif !defined(AV_RN24) && defined(AV_RL24) #define AV_RN24 … # endif # if defined(AV_WN24) && !defined(AV_WL24) #define AV_WL24 … # elif !defined(AV_WN24) && defined(AV_WL24) #define AV_WN24 … # endif # if defined(AV_RN32) && !defined(AV_RL32) #define AV_RL32 … # elif !defined(AV_RN32) && defined(AV_RL32) #define AV_RN32 … # endif # if defined(AV_WN32) && !defined(AV_WL32) #define AV_WL32 … # elif !defined(AV_WN32) && defined(AV_WL32) #define AV_WN32 … # endif # if defined(AV_RN48) && !defined(AV_RL48) #define AV_RL48 … # elif !defined(AV_RN48) && defined(AV_RL48) #define AV_RN48 … # endif # if defined(AV_WN48) && !defined(AV_WL48) #define AV_WL48 … # elif !defined(AV_WN48) && defined(AV_WL48) #define AV_WN48 … # endif # if defined(AV_RN64) && !defined(AV_RL64) #define AV_RL64 … # elif !defined(AV_RN64) && defined(AV_RL64) #define AV_RN64 … # endif # if defined(AV_WN64) && !defined(AV_WL64) #define AV_WL64 … # elif !defined(AV_WN64) && defined(AV_WL64) #define AV_WN64 … # endif #endif /* !AV_HAVE_BIGENDIAN */ /* * Define AV_[RW]N helper macros to simplify definitions not provided * by per-arch headers. */ #if defined(__GNUC__) || defined(__clang__) unaligned_64 __attribute__((packed)) av_alias; unaligned_32 __attribute__((packed)) av_alias; unaligned_16 __attribute__((packed)) av_alias; #define AV_RN(s, p) … #define AV_WN(s, p, v) … #elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_X64) || defined(_M_ARM64)) && AV_HAVE_FAST_UNALIGNED #define AV_RN … #define AV_WN … #elif AV_HAVE_FAST_UNALIGNED #define AV_RN … #define AV_WN … #else #ifndef AV_RB16 #define AV_RB16 … #endif #ifndef AV_WB16 #define AV_WB16 … #endif #ifndef AV_RL16 #define AV_RL16 … #endif #ifndef AV_WL16 #define AV_WL16 … #endif #ifndef AV_RB32 #define AV_RB32 … #endif #ifndef AV_WB32 #define AV_WB32 … #endif #ifndef AV_RL32 #define AV_RL32 … #endif #ifndef AV_WL32 #define AV_WL32 … #endif #ifndef AV_RB64 #define AV_RB64 … #endif #ifndef AV_WB64 #define AV_WB64 … #endif #ifndef AV_RL64 #define AV_RL64 … #endif #ifndef AV_WL64 #define AV_WL64 … #endif #if AV_HAVE_BIGENDIAN #define AV_RN … #define AV_WN … #else #define AV_RN … #define AV_WN … #endif #endif /* HAVE_FAST_UNALIGNED */ #ifndef AV_RN16 #define AV_RN16(p) … #endif #ifndef AV_RN32 #define AV_RN32(p) … #endif #ifndef AV_RN64 #define AV_RN64(p) … #endif #ifndef AV_WN16 #define AV_WN16(p, v) … #endif #ifndef AV_WN32 #define AV_WN32(p, v) … #endif #ifndef AV_WN64 #define AV_WN64(p, v) … #endif #if AV_HAVE_BIGENDIAN #define AV_RB … #define AV_WB … #define AV_RL … #define AV_WL … #else #define AV_RB(s, p) … #define AV_WB(s, p, v) … #define AV_RL(s, p) … #define AV_WL(s, p, v) … #endif #define AV_RB8(x) … #define AV_WB8(p, d) … #define AV_RL8(x) … #define AV_WL8(p, d) … #ifndef AV_RB16 #define AV_RB16(p) … #endif #ifndef AV_WB16 #define AV_WB16(p, v) … #endif #ifndef AV_RL16 #define AV_RL16(p) … #endif #ifndef AV_WL16 #define AV_WL16(p, v) … #endif #ifndef AV_RB32 #define AV_RB32(p) … #endif #ifndef AV_WB32 #define AV_WB32(p, v) … #endif #ifndef AV_RL32 #define AV_RL32(p) … #endif #ifndef AV_WL32 #define AV_WL32(p, v) … #endif #ifndef AV_RB64 #define AV_RB64(p) … #endif #ifndef AV_WB64 #define AV_WB64(p, v) … #endif #ifndef AV_RL64 #define AV_RL64(p) … #endif #ifndef AV_WL64 #define AV_WL64(p, v) … #endif #ifndef AV_RB24 #define AV_RB24(x) … #endif #ifndef AV_WB24 #define AV_WB24(p, d) … #endif #ifndef AV_RL24 #define AV_RL24(x) … #endif #ifndef AV_WL24 #define AV_WL24(p, d) … #endif #ifndef AV_RB48 #define AV_RB48(x) … #endif #ifndef AV_WB48 #define AV_WB48(p, darg) … #endif #ifndef AV_RL48 #define AV_RL48(x) … #endif #ifndef AV_WL48 #define AV_WL48(p, darg) … #endif /* * The AV_[RW]NA macros access naturally aligned data * in a type-safe way. */ #define AV_RNA(s, p) … #define AV_WNA(s, p, v) … #ifndef AV_RN16A #define AV_RN16A(p) … #endif #ifndef AV_RN32A #define AV_RN32A(p) … #endif #ifndef AV_RN64A #define AV_RN64A(p) … #endif #ifndef AV_WN16A #define AV_WN16A(p, v) … #endif #ifndef AV_WN32A #define AV_WN32A(p, v) … #endif #ifndef AV_WN64A #define AV_WN64A(p, v) … #endif #if AV_HAVE_BIGENDIAN #define AV_RLA … #define AV_WLA … #else #define AV_RLA(s, p) … #define AV_WLA(s, p, v) … #endif #ifndef AV_RL64A #define AV_RL64A(p) … #endif #ifndef AV_WL64A #define AV_WL64A(p, v) … #endif /* * The AV_COPYxxU macros are suitable for copying data to/from unaligned * memory locations. */ #define AV_COPYU(n, d, s) … #ifndef AV_COPY16U #define AV_COPY16U(d, s) … #endif #ifndef AV_COPY32U #define AV_COPY32U(d, s) … #endif #ifndef AV_COPY64U #define AV_COPY64U(d, s) … #endif #ifndef AV_COPY128U #define AV_COPY128U(d, s) … #endif /* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be * naturally aligned. */ #define AV_COPY(n, d, s) … #ifndef AV_COPY16 #define AV_COPY16(d, s) … #endif #ifndef AV_COPY32 #define AV_COPY32(d, s) … #endif #ifndef AV_COPY64 #define AV_COPY64(d, s) … #endif #ifndef AV_COPY128 #define AV_COPY128 … #endif #define AV_SWAP(n, a, b) … #ifndef AV_SWAP64 #define AV_SWAP64(a, b) … #endif #define AV_ZERO(n, d) … #ifndef AV_ZERO16 #define AV_ZERO16(d) … #endif #ifndef AV_ZERO32 #define AV_ZERO32(d) … #endif #ifndef AV_ZERO64 #define AV_ZERO64(d) … #endif #ifndef AV_ZERO128 #define AV_ZERO128 … #endif #endif /* AVUTIL_INTREADWRITE_H */
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