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FFmpeg/libavcodec/x86/h264_i386.h
Michael Niedermayer 7427d1ca4a Merge remote-tracking branch 'qatar/master'
* qatar/master:
  g723.1: simplify scale_vector()
  g723.1: simplify normalize_bits()
  vda: cosmetics: fix Doxygen comment formatting
  vda: better frame allocation
  vda: Merge implementation into one file
  vda: support synchronous decoding
  vda: Reuse the bitstream buffer and reallocate it only if needed
  build: Factor out mpegvideo encoding dependencies to CONFIG_MPEGVIDEOENC
  avprobe: Include libm.h for the log2 fallback
  proresenc: use the edge emulation buffer
  rtmp: handle bytes read reports
  configure: Fix typo in mpeg2video/svq1 decoder dependency declaration
  Use log2(x) instead of log(x) / log(2)
  x86: swscale: fix fragile memory accesses
  x86: swscale: remove disabled code
  x86: yadif: fix asm with suncc
  x86: cabac: allow building with suncc
  x86: mlpdsp: avoid taking address of void
  ARM: intmath: use native-size return types for clipping functions

Conflicts:
	configure
	ffprobe.c
	libavcodec/Makefile
	libavcodec/g723_1.c
	libavcodec/v210dec.h
	libavcodec/vda.h
	libavcodec/vda_h264.c
	libavcodec/x86/cabac.h
	libavfilter/x86/yadif_template.c
	libswscale/x86/rgb2rgb_template.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-08-14 15:34:39 +02:00

205 lines
7.8 KiB
C

/*
* H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* 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
*/
/**
* @file
* H.264 / AVC / MPEG4 part10 codec.
* non-MMX i386-specific optimizations for H.264
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#ifndef AVCODEC_X86_H264_I386_H
#define AVCODEC_X86_H264_I386_H
#include <stddef.h>
#include "libavcodec/cabac.h"
#include "cabac.h"
#if HAVE_INLINE_ASM
//FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
//as that would make optimization work hard)
#if HAVE_7REGS
#define decode_significance decode_significance_x86
static int decode_significance_x86(CABACContext *c, int max_coeff,
uint8_t *significant_coeff_ctx_base,
int *index, x86_reg last_off){
void *end= significant_coeff_ctx_base + max_coeff - 1;
int minusstart= -(intptr_t)significant_coeff_ctx_base;
int minusindex= 4-(intptr_t)index;
int bit;
x86_reg coeff_count;
#ifdef BROKEN_RELOCATIONS
void *tables;
__asm__ volatile(
"lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t"
: "=&r"(tables)
);
#endif
__asm__ volatile(
"3: \n\t"
BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
"%5", "%q5", "%k0", "%b0",
"%c11(%6)", "%c12(%6)",
AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
"%13")
"test $1, %4 \n\t"
" jz 4f \n\t"
"add %10, %1 \n\t"
BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
"%5", "%q5", "%k0", "%b0",
"%c11(%6)", "%c12(%6)",
AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
"%13")
"sub %10, %1 \n\t"
"mov %2, %0 \n\t"
"movl %7, %%ecx \n\t"
"add %1, %%"REG_c" \n\t"
"movl %%ecx, (%0) \n\t"
"test $1, %4 \n\t"
" jnz 5f \n\t"
"add"OPSIZE" $4, %2 \n\t"
"4: \n\t"
"add $1, %1 \n\t"
"cmp %8, %1 \n\t"
" jb 3b \n\t"
"mov %2, %0 \n\t"
"movl %7, %%ecx \n\t"
"add %1, %%"REG_c" \n\t"
"movl %%ecx, (%0) \n\t"
"5: \n\t"
"add %9, %k0 \n\t"
"shr $2, %k0 \n\t"
: "=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index),
"+&r"(c->low), "=&r"(bit), "+&r"(c->range)
: "r"(c), "m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off),
"i"(offsetof(CABACContext, bytestream)),
"i"(offsetof(CABACContext, bytestream_end))
TABLES_ARG
: "%"REG_c, "memory"
);
return coeff_count;
}
#define decode_significance_8x8 decode_significance_8x8_x86
static int decode_significance_8x8_x86(CABACContext *c,
uint8_t *significant_coeff_ctx_base,
int *index, uint8_t *last_coeff_ctx_base, const uint8_t *sig_off){
int minusindex= 4-(intptr_t)index;
int bit;
x86_reg coeff_count;
x86_reg last=0;
x86_reg state;
#ifdef BROKEN_RELOCATIONS
void *tables;
__asm__ volatile(
"lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t"
: "=&r"(tables)
);
#endif
__asm__ volatile(
"mov %1, %6 \n\t"
"3: \n\t"
"mov %10, %0 \n\t"
"movzbl (%0, %6), %k6 \n\t"
"add %9, %6 \n\t"
BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
"%5", "%q5", "%k0", "%b0",
"%c12(%7)", "%c13(%7)",
AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
"%15")
"mov %1, %k6 \n\t"
"test $1, %4 \n\t"
" jz 4f \n\t"
#ifdef BROKEN_RELOCATIONS
"movzbl %c14(%15, %q6), %k6\n\t"
#else
"movzbl "MANGLE(ff_h264_cabac_tables)"+%c14(%k6), %k6\n\t"
#endif
"add %11, %6 \n\t"
BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
"%5", "%q5", "%k0", "%b0",
"%c12(%7)", "%c13(%7)",
AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
"%15")
"mov %2, %0 \n\t"
"mov %1, %k6 \n\t"
"movl %k6, (%0) \n\t"
"test $1, %4 \n\t"
" jnz 5f \n\t"
"add"OPSIZE" $4, %2 \n\t"
"4: \n\t"
"addl $1, %k6 \n\t"
"mov %k6, %1 \n\t"
"cmpl $63, %k6 \n\t"
" jb 3b \n\t"
"mov %2, %0 \n\t"
"movl %k6, (%0) \n\t"
"5: \n\t"
"addl %8, %k0 \n\t"
"shr $2, %k0 \n\t"
: "=&q"(coeff_count), "+m"(last), "+m"(index), "+&r"(c->low),
"=&r"(bit), "+&r"(c->range), "=&r"(state)
: "r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base),
"m"(sig_off), "m"(last_coeff_ctx_base),
"i"(offsetof(CABACContext, bytestream)),
"i"(offsetof(CABACContext, bytestream_end)),
"i"(H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET) TABLES_ARG
: "%"REG_c, "memory"
);
return coeff_count;
}
#endif /* HAVE_7REGS && !defined(BROKEN_RELOCATIONS) */
#endif /* HAVE_INLINE_ASM */
#endif /* AVCODEC_X86_H264_I386_H */