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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /media/ffvpx/libavcodec/x86/vpx_arith.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | media/ffvpx/libavcodec/x86/vpx_arith.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/x86/vpx_arith.h b/media/ffvpx/libavcodec/x86/vpx_arith.h new file mode 100644 index 0000000000..d9e4c0dec4 --- /dev/null +++ b/media/ffvpx/libavcodec/x86/vpx_arith.h @@ -0,0 +1,55 @@ +/** + * VP5 and VP6 compatible video decoder (arith decoder) + * + * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> + * Copyright (C) 2010 Eli Friedman + * + * 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 AVCODEC_X86_VPX_ARITH_H +#define AVCODEC_X86_VPX_ARITH_H + +#include "libavutil/x86/asm.h" + +#if HAVE_INLINE_ASM && HAVE_FAST_CMOV && HAVE_6REGS +#include "libavutil/attributes.h" + +#define vpx_rac_get_prob vpx_rac_get_prob +static av_always_inline int vpx_rac_get_prob(VPXRangeCoder *c, uint8_t prob) +{ + unsigned int code_word = vpx_rac_renorm(c); + unsigned int low = 1 + (((c->high - 1) * prob) >> 8); + unsigned int low_shift = low << 16; + int bit = 0; + c->code_word = code_word; + + __asm__( + "subl %4, %1 \n\t" + "subl %3, %2 \n\t" + "setae %b0 \n\t" + "cmovb %4, %1 \n\t" + "cmovb %5, %2 \n\t" + : "+q"(bit), "+&r"(c->high), "+&r"(c->code_word) + : "r"(low_shift), "r"(low), "r"(code_word) + ); + + return bit; +} +#endif + +#endif /* AVCODEC_X86_VPX_ARITH_H */ |