LCOV - code coverage report
Current view: top level - src/libavcodec/x86 - h264_i386.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 14 14 100.0 %
Date: 2017-01-22 02:20:28 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
       3             :  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : /**
      23             :  * @file
      24             :  * H.264 / AVC / MPEG-4 part10 codec.
      25             :  * non-MMX i386-specific optimizations for H.264
      26             :  * @author Michael Niedermayer <michaelni@gmx.at>
      27             :  */
      28             : 
      29             : #ifndef AVCODEC_X86_H264_I386_H
      30             : #define AVCODEC_X86_H264_I386_H
      31             : 
      32             : #include <stddef.h>
      33             : 
      34             : #include "libavcodec/cabac.h"
      35             : #include "cabac.h"
      36             : 
      37             : #if HAVE_INLINE_ASM
      38             : 
      39             : #if ARCH_X86_64
      40             : #define REG64 "r"
      41             : #else
      42             : #define REG64 "m"
      43             : #endif
      44             : 
      45             : //FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
      46             : //as that would make optimization work hard)
      47             : #if HAVE_7REGS && !BROKEN_COMPILER
      48             : #define decode_significance decode_significance_x86
      49    31952160 : static int decode_significance_x86(CABACContext *c, int max_coeff,
      50             :                                    uint8_t *significant_coeff_ctx_base,
      51             :                                    int *index, x86_reg last_off){
      52    31952160 :     void *end= significant_coeff_ctx_base + max_coeff - 1;
      53    31952160 :     int minusstart= -(intptr_t)significant_coeff_ctx_base;
      54    31952160 :     int minusindex= 4-(intptr_t)index;
      55             :     int bit;
      56             :     x86_reg coeff_count;
      57             : 
      58             : #ifdef BROKEN_RELOCATIONS
      59             :     void *tables;
      60             : 
      61             :     __asm__ volatile(
      62             :         "lea   "MANGLE(ff_h264_cabac_tables)", %0      \n\t"
      63             :         : "=&r"(tables)
      64             :         : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
      65             :     );
      66             : #endif
      67             : 
      68    31952160 :     __asm__ volatile(
      69             :         "3:                                     \n\t"
      70             : 
      71             :         BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
      72             :                              "%5", "%q5", "%k0", "%b0",
      73             :                              "%c11(%6)", "%c12(%6)",
      74             :                              AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
      75             :                              AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
      76             :                              AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
      77             :                              "%13")
      78             : 
      79             :         "test $1, %4                            \n\t"
      80             :         " jz 4f                                 \n\t"
      81             :         "add  %10, %1                           \n\t"
      82             : 
      83             :         BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
      84             :                              "%5", "%q5", "%k0", "%b0",
      85             :                              "%c11(%6)", "%c12(%6)",
      86             :                              AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
      87             :                              AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
      88             :                              AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
      89             :                              "%13")
      90             : 
      91             :         "sub  %10, %1                           \n\t"
      92             :         "mov  %2, %0                            \n\t"
      93             :         "movl %7, %%ecx                         \n\t"
      94             :         "add  %1, %%"FF_REG_c"                  \n\t"
      95             :         "movl %%ecx, (%0)                       \n\t"
      96             : 
      97             :         "test $1, %4                            \n\t"
      98             :         " jnz 5f                                \n\t"
      99             : 
     100             :         "add"FF_OPSIZE"  $4, %2                 \n\t"
     101             : 
     102             :         "4:                                     \n\t"
     103             :         "add  $1, %1                            \n\t"
     104             :         "cmp  %8, %1                            \n\t"
     105             :         " jb 3b                                 \n\t"
     106             :         "mov  %2, %0                            \n\t"
     107             :         "movl %7, %%ecx                         \n\t"
     108             :         "add  %1, %%"FF_REG_c"                  \n\t"
     109             :         "movl %%ecx, (%0)                       \n\t"
     110             :         "5:                                     \n\t"
     111             :         "add  %9, %k0                           \n\t"
     112             :         "shr $2, %k0                            \n\t"
     113             :         : "=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index),
     114    31952160 :           "+&r"(c->low), "=&r"(bit), "+&r"(c->range)
     115             :         : "r"(c), "m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off),
     116             :           "i"(offsetof(CABACContext, bytestream)),
     117             :           "i"(offsetof(CABACContext, bytestream_end))
     118             :           TABLES_ARG
     119             :         : "%"FF_REG_c, "memory"
     120             :     );
     121    31952160 :     return coeff_count;
     122             : }
     123             : 
     124             : #define decode_significance_8x8 decode_significance_8x8_x86
     125     4788694 : static int decode_significance_8x8_x86(CABACContext *c,
     126             :                                        uint8_t *significant_coeff_ctx_base,
     127             :                                        int *index, uint8_t *last_coeff_ctx_base, const uint8_t *sig_off){
     128     4788694 :     int minusindex= 4-(intptr_t)index;
     129             :     int bit;
     130             :     x86_reg coeff_count;
     131     4788694 :     x86_reg last=0;
     132             :     x86_reg state;
     133             : 
     134             : #ifdef BROKEN_RELOCATIONS
     135             :     void *tables;
     136             : 
     137             :     __asm__ volatile(
     138             :         "lea    "MANGLE(ff_h264_cabac_tables)", %0      \n\t"
     139             :         : "=&r"(tables)
     140             :         : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
     141             :     );
     142             : #endif
     143             : 
     144     4788694 :     __asm__ volatile(
     145             :         "mov %1, %6                             \n\t"
     146             :         "3:                                     \n\t"
     147             : 
     148             :         "mov %10, %0                            \n\t"
     149             :         "movzb (%0, %6), %6                     \n\t"
     150             :         "add %9, %6                             \n\t"
     151             : 
     152             :         BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
     153             :                              "%5", "%q5", "%k0", "%b0",
     154             :                              "%c12(%7)", "%c13(%7)",
     155             :                              AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
     156             :                              AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
     157             :                              AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
     158             :                              "%15")
     159             : 
     160             :         "mov %1, %6                             \n\t"
     161             :         "test $1, %4                            \n\t"
     162             :         " jz 4f                                 \n\t"
     163             : 
     164             : #ifdef BROKEN_RELOCATIONS
     165             :         "movzb %c14(%15, %q6), %6\n\t"
     166             : #else
     167             :         "movzb "MANGLE(ff_h264_cabac_tables)"+%c14(%6), %6\n\t"
     168             : #endif
     169             :         "add %11, %6                            \n\t"
     170             : 
     171             :         BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
     172             :                              "%5", "%q5", "%k0", "%b0",
     173             :                              "%c12(%7)", "%c13(%7)",
     174             :                              AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
     175             :                              AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
     176             :                              AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
     177             :                              "%15")
     178             : 
     179             :         "mov %2, %0                             \n\t"
     180             :         "mov %1, %6                             \n\t"
     181             :         "mov %k6, (%0)                          \n\t"
     182             : 
     183             :         "test $1, %4                            \n\t"
     184             :         " jnz 5f                                \n\t"
     185             : 
     186             :         "add"FF_OPSIZE"  $4, %2                 \n\t"
     187             : 
     188             :         "4:                                     \n\t"
     189             :         "add $1, %6                             \n\t"
     190             :         "mov %6, %1                             \n\t"
     191             :         "cmp $63, %6                            \n\t"
     192             :         " jb 3b                                 \n\t"
     193             :         "mov %2, %0                             \n\t"
     194             :         "mov %k6, (%0)                          \n\t"
     195             :         "5:                                     \n\t"
     196             :         "addl %8, %k0                           \n\t"
     197             :         "shr $2, %k0                            \n\t"
     198     4788694 :         : "=&q"(coeff_count), "+"REG64(last), "+"REG64(index), "+&r"(c->low),
     199     4788694 :           "=&r"(bit), "+&r"(c->range), "=&r"(state)
     200             :         : "r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base),
     201             :           REG64(sig_off), REG64(last_coeff_ctx_base),
     202             :           "i"(offsetof(CABACContext, bytestream)),
     203             :           "i"(offsetof(CABACContext, bytestream_end)),
     204             :           "i"(H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET) TABLES_ARG
     205             :         : "%"FF_REG_c, "memory"
     206             :     );
     207     4788694 :     return coeff_count;
     208             : }
     209             : #endif /* HAVE_7REGS && BROKEN_COMPILER */
     210             : 
     211             : #endif /* HAVE_INLINE_ASM */
     212             : #endif /* AVCODEC_X86_H264_I386_H */

Generated by: LCOV version 1.12