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91 lines
3.2 KiB
91 lines
3.2 KiB
/* |
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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 INTREADWRITE_H |
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#define INTREADWRITE_H |
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#ifdef __GNUC__ |
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struct unaligned_64 { uint64_t l; } __attribute__((packed)); |
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struct unaligned_32 { uint32_t l; } __attribute__((packed)); |
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struct unaligned_16 { uint16_t l; } __attribute__((packed)); |
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#define LD16(a) (((const struct unaligned_16 *) (a))->l) |
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#define LD32(a) (((const struct unaligned_32 *) (a))->l) |
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#define LD64(a) (((const struct unaligned_64 *) (a))->l) |
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#define ST16(a, b) (((struct unaligned_16 *) (a))->l) = (b) |
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#define ST32(a, b) (((struct unaligned_32 *) (a))->l) = (b) |
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#else /* __GNUC__ */ |
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#define LD16(a) (*((uint16_t*)(a))) |
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#define LD32(a) (*((uint32_t*)(a))) |
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#define LD64(a) (*((uint64_t*)(a))) |
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#define ST16(a, b) *((uint16_t*)(a)) = (b) |
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#define ST32(a, b) *((uint32_t*)(a)) = (b) |
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#endif /* !__GNUC__ */ |
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/* endian macros */ |
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#define AV_RB8(x) (((uint8_t*)(x))[0]) |
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#define AV_WB8(p, d) { ((uint8_t*)(p))[0] = (d); } |
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#define AV_RB16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1]) |
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#define AV_WB16(p, d) { \ |
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((uint8_t*)(p))[1] = (d); \ |
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((uint8_t*)(p))[0] = (d)>>8; } |
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#define AV_RB24(x) ((((uint8_t*)(x))[0] << 16) | \ |
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(((uint8_t*)(x))[1] << 8) | \ |
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((uint8_t*)(x))[2]) |
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#define AV_WB24(p, d) { \ |
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((uint8_t*)(p))[2] = (d); \ |
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((uint8_t*)(p))[1] = (d)>>8; \ |
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((uint8_t*)(p))[0] = (d)>>16; } |
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#define AV_RB32(x) ((((uint8_t*)(x))[0] << 24) | \ |
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(((uint8_t*)(x))[1] << 16) | \ |
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(((uint8_t*)(x))[2] << 8) | \ |
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((uint8_t*)(x))[3]) |
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#define AV_WB32(p, d) { \ |
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((uint8_t*)(p))[3] = (d); \ |
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((uint8_t*)(p))[2] = (d)>>8; \ |
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((uint8_t*)(p))[1] = (d)>>16; \ |
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((uint8_t*)(p))[0] = (d)>>24; } |
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#define AV_RL8(x) AV_RB8(x) |
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#define AV_WL8(p, d) AV_WB8(p, d) |
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#define AV_RL16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0]) |
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#define AV_WL16(p, d) { \ |
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((uint8_t*)(p))[0] = (d); \ |
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((uint8_t*)(p))[1] = (d)>>8; } |
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#define AV_RL32(x) ((((uint8_t*)(x))[3] << 24) | \ |
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(((uint8_t*)(x))[2] << 16) | \ |
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(((uint8_t*)(x))[1] << 8) | \ |
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((uint8_t*)(x))[0]) |
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#define AV_WL32(p, d) { \ |
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((uint8_t*)(p))[0] = (d); \ |
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((uint8_t*)(p))[1] = (d)>>8; \ |
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((uint8_t*)(p))[2] = (d)>>16; \ |
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((uint8_t*)(p))[3] = (d)>>24; } |
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#endif /* INTREADWRITE_H */
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