mirror of
https://github.com/FFmpeg/FFmpeg.git
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d40ff29cac
* qatar/master:
asf: only set index_read if the index contained entries.
cabac: add overread protection to BRANCHLESS_GET_CABAC().
cabac: increment jump locations by one in callers of BRANCHLESS_GET_CABAC().
cabac: remove unused argument from BRANCHLESS_GET_CABAC_UPDATE().
cabac: use struct+offset instead of memory operand in BRANCHLESS_GET_CABAC().
h264: add overread protection to get_cabac_bypass_sign_x86().
h264: reindent get_cabac_bypass_sign_x86().
h264: use struct offsets in get_cabac_bypass_sign_x86().
h264: fix overreads in cabac reader.
wmall: fix seeking.
lagarith: fix buffer overreads.
dvdec: drop unnecessary dv_tablegen.h #include
build: fix doc generation errors in parallel builds
Replace memset(0) by zero initializations.
faandct: Remove FAAN_POSTSCALE define and related code.
dvenc: print allowed profiles if the video doesn't conform to any of them.
avcodec_encode_{audio,video}: only reallocate output packet when it has non-zero size.
FATE: add a test for vp8 with changing frame size.
fate: add kgv1 fate test.
oggdec: calculate correct timestamps in Ogg/FLAC
Conflicts:
libavcodec/4xm.c
libavcodec/cook.c
libavcodec/dvdata.c
libavcodec/dvdsubdec.c
libavcodec/lagarith.c
libavcodec/lagarithrac.c
libavcodec/utils.c
tests/fate/video.mak
Merged-by: Michael Niedermayer <michaelni@gmx.at>
147 lines
6.9 KiB
C
147 lines
6.9 KiB
C
/*
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 AVCODEC_X86_CABAC_H
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#define AVCODEC_X86_CABAC_H
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#include "libavcodec/cabac.h"
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#include "libavutil/attributes.h"
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#include "libavutil/x86_cpu.h"
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#include "config.h"
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#if HAVE_FAST_CMOV
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#define BRANCHLESS_GET_CABAC_UPDATE(ret, statep, low, range, tmp)\
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"mov "tmp" , %%ecx \n\t"\
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"shl $17 , "tmp" \n\t"\
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"cmp "low" , "tmp" \n\t"\
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"cmova %%ecx , "range" \n\t"\
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"sbb %%ecx , %%ecx \n\t"\
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"and %%ecx , "tmp" \n\t"\
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"xor %%ecx , "ret" \n\t"\
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"sub "tmp" , "low" \n\t"
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#else /* HAVE_FAST_CMOV */
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#define BRANCHLESS_GET_CABAC_UPDATE(ret, statep, low, range, tmp)\
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"mov "tmp" , %%ecx \n\t"\
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"shl $17 , "tmp" \n\t"\
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"sub "low" , "tmp" \n\t"\
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"sar $31 , "tmp" \n\t" /*lps_mask*/\
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"sub %%ecx , "range" \n\t" /*RangeLPS - range*/\
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"and "tmp" , "range" \n\t" /*(RangeLPS - range)&lps_mask*/\
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"add %%ecx , "range" \n\t" /*new range*/\
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"shl $17 , %%ecx \n\t"\
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"and "tmp" , %%ecx \n\t"\
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"sub %%ecx , "low" \n\t"\
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"xor "tmp" , "ret" \n\t"
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#endif /* HAVE_FAST_CMOV */
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#define BRANCHLESS_GET_CABAC(ret, statep, low, lowword, range, tmp, tmpbyte, byte, end) \
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"movzbl "statep" , "ret" \n\t"\
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"mov "range" , "tmp" \n\t"\
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"and $0xC0 , "range" \n\t"\
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"movzbl "MANGLE(ff_h264_lps_range)"("ret", "range", 2), "range" \n\t"\
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"sub "range" , "tmp" \n\t"\
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BRANCHLESS_GET_CABAC_UPDATE(ret, statep, low, range, tmp) \
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"movzbl " MANGLE(ff_h264_norm_shift) "("range"), %%ecx \n\t"\
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"shl %%cl , "range" \n\t"\
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"movzbl "MANGLE(ff_h264_mlps_state)"+128("ret"), "tmp" \n\t"\
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"shl %%cl , "low" \n\t"\
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"mov "tmpbyte" , "statep" \n\t"\
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"test "lowword" , "lowword" \n\t"\
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" jnz 2f \n\t"\
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"mov "byte" , %%"REG_c" \n\t"\
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"add"OPSIZE" $2 , "byte" \n\t"\
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"movzwl (%%"REG_c") , "tmp" \n\t"\
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"lea -1("low") , %%ecx \n\t"\
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"xor "low" , %%ecx \n\t"\
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"shr $15 , %%ecx \n\t"\
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"bswap "tmp" \n\t"\
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"shr $15 , "tmp" \n\t"\
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"movzbl " MANGLE(ff_h264_norm_shift) "(%%ecx), %%ecx \n\t"\
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"sub $0xFFFF , "tmp" \n\t"\
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"neg %%ecx \n\t"\
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"add $7 , %%ecx \n\t"\
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"shl %%cl , "tmp" \n\t"\
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"add "tmp" , "low" \n\t"\
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"2: \n\t"
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#if HAVE_7REGS && !defined(BROKEN_RELOCATIONS) && !(defined(__i386) && defined(__clang__) && (__clang_major__<2 || (__clang_major__==2 && __clang_minor__<10)))\
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&& !(defined(__i386) && !defined(__clang__) && defined(__llvm__) && __GNUC__==4 && __GNUC_MINOR__==2 && __GNUC_PATCHLEVEL__<=1)
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#define get_cabac_inline get_cabac_inline_x86
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static av_always_inline int get_cabac_inline_x86(CABACContext *c,
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uint8_t *const state)
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{
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int bit, tmp;
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__asm__ volatile(
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BRANCHLESS_GET_CABAC("%0", "(%4)", "%1", "%w1",
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"%2", "%3", "%b3",
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"%a6(%5)", "%a7(%5)")
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: "=&r"(bit), "+&r"(c->low), "+&r"(c->range), "=&q"(tmp)
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: "r"(state), "r"(c),
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"i"(offsetof(CABACContext, bytestream)),
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"i"(offsetof(CABACContext, bytestream_end))
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: "%"REG_c, "memory"
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);
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return bit & 1;
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}
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#endif /* HAVE_7REGS && !defined(BROKEN_RELOCATIONS) */
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#define get_cabac_bypass_sign get_cabac_bypass_sign_x86
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static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val)
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{
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x86_reg tmp;
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__asm__ volatile(
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"movl %a6(%2), %k1 \n\t"
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"movl %a3(%2), %%eax \n\t"
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"shl $17, %k1 \n\t"
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"add %%eax, %%eax \n\t"
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"sub %k1, %%eax \n\t"
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"cltd \n\t"
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"and %%edx, %k1 \n\t"
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"add %k1, %%eax \n\t"
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"xor %%edx, %%ecx \n\t"
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"sub %%edx, %%ecx \n\t"
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"test %%ax, %%ax \n\t"
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"jnz 1f \n\t"
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"mov %a4(%2), %1 \n\t"
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"subl $0xFFFF, %%eax \n\t"
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"movzwl (%1), %%edx \n\t"
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"bswap %%edx \n\t"
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"shrl $15, %%edx \n\t"
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"add $2, %1 \n\t"
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"addl %%edx, %%eax \n\t"
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"mov %1, %a4(%2) \n\t"
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"1: \n\t"
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"movl %%eax, %a3(%2) \n\t"
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: "+c"(val), "=&r"(tmp)
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: "r"(c),
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"i"(offsetof(CABACContext, low)),
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"i"(offsetof(CABACContext, bytestream)),
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"i"(offsetof(CABACContext, bytestream_end)),
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"i"(offsetof(CABACContext, range))
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: "%eax", "%edx", "memory"
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);
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return val;
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}
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#endif /* AVCODEC_X86_CABAC_H */
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