PeerStreamer

/*

 * copyright (c) 2006 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 internal.h

 * common internal api header.

 */

#ifndef INTERNAL_H

#define INTERNAL_H

#include <stdint.h>

#include <assert.h>

#ifndef attribute_used

#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)

#    define attribute_used __attribute__((used))

#else

#    define attribute_used

#endif

#endif

#ifndef M_PI

#define M_PI    3.14159265358979323846

#endif

#ifndef INT16_MIN

#define INT16_MIN       (-0x7fff-1)

#endif

#ifndef INT16_MAX

#define INT16_MAX       0x7fff

#endif

#ifndef INT32_MIN

#define INT32_MIN       (-0x7fffffff-1)

#endif

#ifndef INT32_MAX

#define INT32_MAX       0x7fffffff

#endif

#ifndef UINT32_MAX

#define UINT32_MAX      0xffffffff

#endif

#ifndef INT64_MIN

#define INT64_MIN       (-0x7fffffffffffffffLL-1)

#endif

#ifndef INT64_MAX

#define INT64_MAX INT64_C(9223372036854775807)

#endif

#ifndef UINT64_MAX

#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)

#endif

#ifndef INT_BIT

#    if INT_MAX != 2147483647

#        define INT_BIT 64

#    else

#        define INT_BIT 32

#    endif

#endif

#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)

#    define PIC

#endif

#include "intreadwrite.h"

#include "bswap.h"

#include <stddef.h>

#ifndef offsetof

#    define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))

#endif

#ifdef USE_FASTMEMCPY

#    include "libvo/fastmemcpy.h"

#    define memcpy(a,b,c) fast_memcpy(a,b,c)

#endif

// Use rip-relative addressing if compiling PIC code on x86-64.

#if defined(__MINGW32__) || defined(__CYGWIN__) || \

    defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))

#    if defined(ARCH_X86_64) && defined(PIC)

#        define MANGLE(a) "_" #a"(%%rip)"

#    else

#        define MANGLE(a) "_" #a

#    endif

#else

#    if defined(ARCH_X86_64) && defined(PIC)

#        define MANGLE(a) #a"(%%rip)"

#    elif defined(CONFIG_DARWIN)

#        define MANGLE(a) "_" #a

#    else

#        define MANGLE(a) #a

#    endif

#endif

/* debug stuff */

#if !defined(DEBUG) && !defined(NDEBUG)

#    define NDEBUG

#endif

#include <assert.h>

/* dprintf macros */

#ifdef DEBUG

#    define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)

#else

#    define dprintf(pctx, ...)

#endif

#define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)

/* math */

extern const uint32_t ff_inverse[256];

#if defined(ARCH_X86)

#    define FASTDIV(a,b) \

    ({\

        int ret,dmy;\

        asm volatile(\

            "mull %3"\

            :"=d"(ret),"=a"(dmy)\

            :"1"(a),"g"(ff_inverse[b])\

            );\

        ret;\

    })

#elif defined(ARCH_ARMV4L)

#    define FASTDIV(a,b) \

    ({\

        int ret,dmy;\

        asm volatile(\

            "umull %1, %0, %2, %3"\

            :"=&r"(ret),"=&r"(dmy)\

            :"r"(a),"r"(ff_inverse[b])\

            );\

        ret;\

    })

#elif defined(CONFIG_FASTDIV)

#    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))

#else

#    define FASTDIV(a,b)   ((a)/(b))

#endif

extern const uint8_t ff_sqrt_tab[128];

static inline int ff_sqrt(int a)

{

    int ret=0;

    int s, b;

    if(a<128) return ff_sqrt_tab[a];

    for(s=30; s>=0; s-=2){

        ret+=ret;

        b= (1+2*ret)<<s;

        if(b<=a){

            a-=b;

            ret++;

        }

    }

    return ret;

}

#if defined(ARCH_X86)

#define MASK_ABS(mask, level)\

            asm volatile(\

                "cdq                    \n\t"\

                "xorl %1, %0            \n\t"\

                "subl %1, %0            \n\t"\

                : "+a" (level), "=&d" (mask)\

            );

#else

#define MASK_ABS(mask, level)\

            mask= level>>31;\

            level= (level^mask)-mask;

#endif

#ifdef HAVE_CMOV

#define COPY3_IF_LT(x,y,a,b,c,d)\

asm volatile (\

    "cmpl %0, %3        \n\t"\

    "cmovl %3, %0       \n\t"\

    "cmovl %4, %1       \n\t"\

    "cmovl %5, %2       \n\t"\

    : "+&r" (x), "+&r" (a), "+r" (c)\

    : "r" (y), "r" (b), "r" (d)\

);

#else

#define COPY3_IF_LT(x,y,a,b,c,d)\

if((y)<(x)){\

     (x)=(y);\

     (a)=(b);\

     (c)=(d);\

}

#endif

/* avoid usage of various functions */

#undef  malloc

#define malloc please_use_av_malloc

#undef  free

#define free please_use_av_free

#undef  realloc

#define realloc please_use_av_realloc

#undef  time

#define time time_is_forbidden_due_to_security_issues

#undef  rand

#define rand rand_is_forbidden_due_to_state_trashing_use_av_random

#undef  srand

#define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random

#undef  random

#define random random_is_forbidden_due_to_state_trashing_use_av_random

#undef  sprintf

#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf

#undef  strcat

#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat

#undef  exit

#define exit exit_is_forbidden

#if !(defined(LIBAVFORMAT_BUILD) || defined(FRAMEHOOK_H))

#undef  printf

#define printf please_use_av_log

#undef  fprintf

#define fprintf please_use_av_log

#endif

#define CHECKED_ALLOCZ(p, size)\

{\

    p= av_mallocz(size);\

    if(p==NULL && (size)!=0){\

        perror("malloc");\

        goto fail;\

    }\

}

#ifndef HAVE_LRINTF

/* XXX: add ISOC specific test to avoid specific BSD testing. */

/* better than nothing implementation. */

/* btw, rintf() is existing on fbsd too -- alex */

static av_always_inline long int lrintf(float x)

{

    return (int)(rint(x));

}

#endif /* HAVE_LRINTF */

#endif /* INTERNAL_H */