/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; 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.
+ * @file
+ * common internal API header
*/
-#ifndef INTERNAL_H
-#define INTERNAL_H
+#ifndef AVUTIL_INTERNAL_H
+#define AVUTIL_INTERNAL_H
-#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
-# define PIC
+#if !defined(DEBUG) && !defined(NDEBUG)
+# define NDEBUG
#endif
-# ifndef ENODATA
-# define ENODATA 61
-# endif
+#include <limits.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <assert.h>
+#include "config.h"
+#include "attributes.h"
+#include "dict.h"
-#include "bswap.h"
+#if ARCH_X86
+# include "x86/emms.h"
+#endif
-#include <stddef.h>
-#ifndef offsetof
-# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
+#ifndef emms_c
+# define emms_c()
#endif
-#ifdef __MINGW32__
-# ifdef _DEBUG
-# define DEBUG
-# endif
+#ifndef attribute_align_arg
+#if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2)
+# define attribute_align_arg __attribute__((force_align_arg_pointer))
+#else
+# define attribute_align_arg
+#endif
+#endif
-# define snprintf _snprintf
-# define vsnprintf _vsnprintf
+#if defined(_MSC_VER) && CONFIG_SHARED
+# define av_export __declspec(dllimport)
+#else
+# define av_export
+#endif
-# ifdef CONFIG_WINCE
-# define perror(a)
+#if HAVE_PRAGMA_DEPRECATED
+# if defined(__ICL)
+# define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:1478))
+# define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop))
+# elif defined(_MSC_VER)
+# define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:4996))
+# define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop))
+# else
+# define FF_DISABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+# define FF_ENABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic warning \"-Wdeprecated-declarations\"")
# endif
+#else
+# define FF_DISABLE_DEPRECATION_WARNINGS
+# define FF_ENABLE_DEPRECATION_WARNINGS
+#endif
-/* __MINGW32__ end */
-#elif defined (CONFIG_OS2)
-/* OS/2 EMX */
-
-#include <float.h>
-
-#endif /* !__MINGW32__ && CONFIG_OS2 */
+#ifndef INT_BIT
+# define INT_BIT (CHAR_BIT * sizeof(int))
+#endif
-# ifdef USE_FASTMEMCPY
-# include "libvo/fastmemcpy.h"
-# endif
+// Some broken preprocessors need a second expansion
+// to be forced to tokenize __VA_ARGS__
+#define E1(x) x
-// 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
+/* Check if the hard coded offset of a struct member still matches reality.
+ * Induce a compilation failure if not.
+ */
+#define AV_CHECK_OFFSET(s, m, o) struct check_##o { \
+ int x_##o[offsetof(s, m) == o? 1: -1]; \
+ }
-/* debug stuff */
+#define LOCAL_ALIGNED_A(a, t, v, s, o, ...) \
+ uint8_t la_##v[sizeof(t s o) + (a)]; \
+ t (*v) o = (void *)FFALIGN((uintptr_t)la_##v, a)
-# if !defined(DEBUG) && !defined(NDEBUG)
-# define NDEBUG
-# endif
-# include <assert.h>
+#define LOCAL_ALIGNED_D(a, t, v, s, o, ...) \
+ DECLARE_ALIGNED(a, t, la_##v) s o; \
+ t (*v) o = la_##v
-/* dprintf macros */
-# ifdef DEBUG
-# define dprintf(fmt,...) av_log(NULL, AV_LOG_DEBUG, fmt, __VA_ARGS__)
-# else
-# define dprintf(fmt,...)
-# endif
+#define LOCAL_ALIGNED(a, t, v, ...) E1(LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,))
-# ifdef CONFIG_WINCE
-# define abort()
-# endif
+#if HAVE_LOCAL_ALIGNED_8
+# define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,))
+#else
+# define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED(8, t, v, __VA_ARGS__)
+#endif
-# define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
-
-extern const uint32_t inverse[256];
-
-#if defined(ARCH_X86)
-# define FASTDIV(a,b) \
- ({\
- int ret,dmy;\
- asm volatile(\
- "mull %3"\
- :"=d"(ret),"=a"(dmy)\
- :"1"(a),"g"(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"(inverse[b])\
- );\
- ret;\
- })
-#elif defined(CONFIG_FASTDIV)
-# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*inverse[b])>>32))
+#if HAVE_LOCAL_ALIGNED_16
+# define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,))
#else
-# define FASTDIV(a,b) ((a)/(b))
+# define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED(16, t, v, __VA_ARGS__)
#endif
-/* math */
-extern FF_IMPORT_ATTR const uint8_t ff_sqrt_tab[128];
+#define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
+{\
+ p = av_malloc(size);\
+ if (p == NULL && (size) != 0) {\
+ av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
+ goto label;\
+ }\
+}
-static inline int ff_sqrt(int a)
-{
- int ret=0;
- int s;
- int ret_sq=0;
+#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
+{\
+ p = av_mallocz(size);\
+ if (p == NULL && (size) != 0) {\
+ av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
+ goto label;\
+ }\
+}
- if(a<128) return ff_sqrt_tab[a];
+#include "libm.h"
- for(s=15; s>=0; s--){
- int b= ret_sq + (1<<(s*2)) + (ret<<s)*2;
- if(b<=a){
- ret_sq=b;
- ret+= 1<<s;
- }
- }
- return ret;
-}
+#if defined(_MSC_VER)
+#pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_strtod")
+#pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_snprintf")
+#endif
-#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)\
- );
+/**
+ * Return NULL if CONFIG_SMALL is true, otherwise the argument
+ * without modification. Used to disable the definition of strings
+ * (for example AVCodec long_names).
+ */
+#if CONFIG_SMALL
+# define NULL_IF_CONFIG_SMALL(x) NULL
#else
-#define MASK_ABS(mask, level)\
- mask= level>>31;\
- level= (level^mask)-mask;
+# define NULL_IF_CONFIG_SMALL(x) x
#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);\
-}
+
+/**
+ * Define a function with only the non-default version specified.
+ *
+ * On systems with ELF shared libraries, all symbols exported from
+ * Libav libraries are tagged with the name and major version of the
+ * library to which they belong. If a function is moved from one
+ * library to another, a wrapper must be retained in the original
+ * location to preserve binary compatibility.
+ *
+ * Functions defined with this macro will never be used to resolve
+ * symbols by the build-time linker.
+ *
+ * @param type return type of function
+ * @param name name of function
+ * @param args argument list of function
+ * @param ver version tag to assign function
+ */
+#if HAVE_SYMVER_ASM_LABEL
+# define FF_SYMVER(type, name, args, ver) \
+ type ff_##name args __asm__ (EXTERN_PREFIX #name "@" ver); \
+ type ff_##name args
+#elif HAVE_SYMVER_GNU_ASM
+# define FF_SYMVER(type, name, args, ver) \
+ __asm__ (".symver ff_" #name "," EXTERN_PREFIX #name "@" ver); \
+ type ff_##name args; \
+ type ff_##name args
#endif
-/* avoid usage of various functions */
-#define malloc please_use_av_malloc
-#define free please_use_av_free
-#define realloc please_use_av_realloc
-#define time time_is_forbidden_due_to_security_issues
-#define rand rand_is_forbidden_due_to_state_trashing
-#define srand srand_is_forbidden_due_to_state_trashing
-#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
-#define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat
-#if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))
-#define printf please_use_av_log
-#define fprintf please_use_av_log
+/**
+ * Return NULL if a threading library has not been enabled.
+ * Used to disable threading functions in AVCodec definitions
+ * when not needed.
+ */
+#if HAVE_THREADS
+# define ONLY_IF_THREADS_ENABLED(x) x
+#else
+# define ONLY_IF_THREADS_ENABLED(x) NULL
#endif
-#define CHECKED_ALLOCZ(p, size)\
-{\
- p= av_mallocz(size);\
- if(p==NULL && (size)!=0){\
- perror("malloc");\
- goto fail;\
- }\
-}
+/**
+ * Log a generic warning message about a missing feature.
+ *
+ * @param[in] avc a pointer to an arbitrary struct of which the first
+ * field is a pointer to an AVClass struct
+ * @param[in] msg string containing the name of the missing feature
+ */
+void avpriv_report_missing_feature(void *avc,
+ const char *msg, ...) av_printf_format(2, 3);
-#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 always_inline long int lrintf(float x)
-{
-#ifdef __MINGW32__
-# ifdef ARCH_X86_32
- int32_t i;
- asm volatile(
- "fistpl %0\n\t"
- : "=m" (i) : "t" (x) : "st"
- );
- return i;
-# else
- /* XXX: incorrect, but make it compile */
- return (int)(x + (x < 0 ? -0.5 : 0.5));
-# endif /* ARCH_X86_32 */
-#else
- return (int)(rint(x));
-#endif /* __MINGW32__ */
-}
-#endif /* HAVE_LRINTF */
+/**
+ * Log a generic warning message about a missing feature.
+ * Additionally request that a sample showcasing the feature be uploaded.
+ *
+ * @param[in] avc a pointer to an arbitrary struct of which the first field is
+ * a pointer to an AVClass struct
+ * @param[in] msg string containing the name of the missing feature
+ */
+void avpriv_request_sample(void *avc,
+ const char *msg, ...) av_printf_format(2, 3);
+
+#if HAVE_LIBC_MSVCRT
+#define avpriv_open ff_open
+#endif
+
+/**
+ * A wrapper for open() setting O_CLOEXEC.
+ */
+int avpriv_open(const char *filename, int flags, ...);
-#endif /* INTERNAL_H */
+#endif /* AVUTIL_INTERNAL_H */
projects / ffmpeg / blobdiff