mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
286 lines
6.5 KiB
C
286 lines
6.5 KiB
C
/*
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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*
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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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/**
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* @file internal.h
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* common internal api header.
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*/
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#ifndef INTERNAL_H
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#define INTERNAL_H
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#include <stdint.h>
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#include <assert.h>
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#ifndef attribute_used
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#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
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# define attribute_used __attribute__((used))
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#else
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# define attribute_used
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#endif
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#endif
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#ifndef INT16_MIN
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#define INT16_MIN (-0x7fff-1)
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#endif
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#ifndef INT16_MAX
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#define INT16_MAX 0x7fff
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#endif
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#ifndef INT32_MIN
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#define INT32_MIN (-0x7fffffff-1)
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#endif
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#ifndef INT32_MAX
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#define INT32_MAX 0x7fffffff
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#endif
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#ifndef UINT32_MAX
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#define UINT32_MAX 0xffffffff
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#endif
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#ifndef INT64_MIN
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#define INT64_MIN (-0x7fffffffffffffffLL-1)
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#endif
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#ifndef INT64_MAX
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#define INT64_MAX INT64_C(9223372036854775807)
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#endif
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#ifndef UINT64_MAX
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#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
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#endif
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#ifndef INT_BIT
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# if INT_MAX != 2147483647
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# define INT_BIT 64
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# else
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# define INT_BIT 32
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# endif
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#endif
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#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
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# define PIC
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#endif
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#include "intreadwrite.h"
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#include "bswap.h"
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#include <stddef.h>
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#ifndef offsetof
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# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
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#endif
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#ifdef __MINGW32__
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# ifdef _DEBUG
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# define DEBUG
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# endif
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# define snprintf _snprintf
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# define vsnprintf _vsnprintf
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/* __MINGW32__ end */
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#elif defined (CONFIG_OS2)
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/* OS/2 EMX */
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# include <float.h>
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#endif /* !__MINGW32__ && CONFIG_OS2 */
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#ifdef USE_FASTMEMCPY
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# include "libvo/fastmemcpy.h"
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# define memcpy(a,b,c) fast_memcpy(a,b,c)
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#endif
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// Use rip-relative addressing if compiling PIC code on x86-64.
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#if defined(__MINGW32__) || defined(__CYGWIN__) || \
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defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
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# if defined(ARCH_X86_64) && defined(PIC)
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# define MANGLE(a) "_" #a"(%%rip)"
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# else
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# define MANGLE(a) "_" #a
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# endif
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#else
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# if defined(ARCH_X86_64) && defined(PIC)
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# define MANGLE(a) #a"(%%rip)"
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# elif defined(CONFIG_DARWIN)
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# define MANGLE(a) "_" #a
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# else
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# define MANGLE(a) #a
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# endif
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#endif
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/* debug stuff */
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#if !defined(DEBUG) && !defined(NDEBUG)
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# define NDEBUG
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#endif
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#include <assert.h>
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/* dprintf macros */
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#ifdef DEBUG
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# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
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#else
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# define dprintf(pctx, ...)
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#endif
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#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
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/* math */
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extern const uint32_t ff_inverse[256];
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#if defined(ARCH_X86)
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# define FASTDIV(a,b) \
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({\
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int ret,dmy;\
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asm volatile(\
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"mull %3"\
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:"=d"(ret),"=a"(dmy)\
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:"1"(a),"g"(ff_inverse[b])\
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);\
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ret;\
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})
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#elif defined(ARCH_ARMV4L)
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# define FASTDIV(a,b) \
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({\
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int ret,dmy;\
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asm volatile(\
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"umull %1, %0, %2, %3"\
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:"=&r"(ret),"=&r"(dmy)\
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:"r"(a),"r"(ff_inverse[b])\
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);\
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ret;\
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})
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#elif defined(CONFIG_FASTDIV)
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# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
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#else
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# define FASTDIV(a,b) ((a)/(b))
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#endif
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extern const uint8_t ff_sqrt_tab[128];
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static inline int ff_sqrt(int a)
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{
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int ret=0;
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int s, b;
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if(a<128) return ff_sqrt_tab[a];
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for(s=30; s>=0; s-=2){
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ret+=ret;
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b= (1+2*ret)<<s;
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if(b<=a){
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a-=b;
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ret++;
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}
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}
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return ret;
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}
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#if defined(ARCH_X86)
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#define MASK_ABS(mask, level)\
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asm volatile(\
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"cdq \n\t"\
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"xorl %1, %0 \n\t"\
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"subl %1, %0 \n\t"\
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: "+a" (level), "=&d" (mask)\
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);
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#else
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#define MASK_ABS(mask, level)\
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mask= level>>31;\
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level= (level^mask)-mask;
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#endif
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#ifdef HAVE_CMOV
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#define COPY3_IF_LT(x,y,a,b,c,d)\
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asm volatile (\
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"cmpl %0, %3 \n\t"\
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"cmovl %3, %0 \n\t"\
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"cmovl %4, %1 \n\t"\
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"cmovl %5, %2 \n\t"\
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: "+&r" (x), "+&r" (a), "+r" (c)\
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: "r" (y), "r" (b), "r" (d)\
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);
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#else
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#define COPY3_IF_LT(x,y,a,b,c,d)\
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if((y)<(x)){\
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(x)=(y);\
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(a)=(b);\
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(c)=(d);\
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}
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#endif
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/* avoid usage of various functions */
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#define malloc please_use_av_malloc
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#define free please_use_av_free
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#define realloc please_use_av_realloc
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#define time time_is_forbidden_due_to_security_issues
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#define rand rand_is_forbidden_due_to_state_trashing_use_av_random
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#define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
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#define random random_is_forbidden_due_to_state_trashing_use_av_random
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#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
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#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
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#define exit exit_is_forbidden
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#if !(defined(LIBAVFORMAT_BUILD) || defined(FRAMEHOOK_H))
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#define printf please_use_av_log
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#define fprintf please_use_av_log
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#endif
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#define CHECKED_ALLOCZ(p, size)\
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{\
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p= av_mallocz(size);\
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if(p==NULL && (size)!=0){\
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perror("malloc");\
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goto fail;\
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}\
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}
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#ifndef HAVE_LRINTF
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/* XXX: add ISOC specific test to avoid specific BSD testing. */
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/* better than nothing implementation. */
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/* btw, rintf() is existing on fbsd too -- alex */
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static av_always_inline long int lrintf(float x)
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{
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#ifdef __MINGW32__
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# ifdef ARCH_X86_32
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int32_t i;
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asm volatile(
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"fistpl %0\n\t"
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: "=m" (i) : "t" (x) : "st"
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);
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return i;
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# else
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/* XXX: incorrect, but make it compile */
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return (int)(x + (x < 0 ? -0.5 : 0.5));
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# endif /* ARCH_X86_32 */
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#else
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return (int)(rint(x));
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#endif /* __MINGW32__ */
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}
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#endif /* HAVE_LRINTF */
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#endif /* INTERNAL_H */
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