/*
* 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
*/
#include <assert.h>
#include "config.h"
#include "attributes.h"
-#include "timer.h"
+#include "dict.h"
+#include "macros.h"
+#include "pixfmt.h"
+
+#if ARCH_X86
+# include "x86/emms.h"
+#endif
+
+#ifndef emms_c
+# define emms_c()
+#endif
#ifndef attribute_align_arg
-#if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,2)
+#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
-
-/**
- * Mark a variable as used and prevent the compiler from optimizing it away.
- * This is useful for asm that accesses varibles in ways that the compiler does not
- * understand
- */
-#ifndef attribute_used
-#if AV_GCC_VERSION_AT_LEAST(3,1)
-# define attribute_used __attribute__((used))
+#if defined(_MSC_VER) && CONFIG_SHARED
+# define av_export __declspec(dllimport)
#else
-# define attribute_used
-#endif
-#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)
+# define av_export
+#endif
+
+#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
-#ifndef INT64_MAX
-#define INT64_MAX INT64_C(9223372036854775807)
-#endif
+// Some broken preprocessors need a second expansion
+// to be forced to tokenize __VA_ARGS__
+#define E1(x) x
-#ifndef UINT64_MAX
-#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
-#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]; \
+ }
-#ifndef INT_BIT
-# define INT_BIT (CHAR_BIT * sizeof(int))
-#endif
+#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)
-#ifndef offsetof
-# define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F))
-#endif
+#define LOCAL_ALIGNED_D(a, t, v, s, o, ...) \
+ DECLARE_ALIGNED(a, t, la_##v) s o; \
+ t (*v) o = la_##v
-/* Use to export labels from asm. */
-#define LABEL_MANGLE(a) EXTERN_PREFIX #a
+#define LOCAL_ALIGNED(a, t, v, ...) E1(LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,))
-// Use rip-relative addressing if compiling PIC code on x86-64.
-#if ARCH_X86_64 && defined(PIC)
-# define LOCAL_MANGLE(a) #a "(%%rip)"
+#if HAVE_LOCAL_ALIGNED_8
+# define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,))
#else
-# define LOCAL_MANGLE(a) #a
+# define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED(8, t, v, __VA_ARGS__)
#endif
-#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
-
-/* debug stuff */
-
-/* dprintf macros */
-#ifdef DEBUG
-# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
+#if HAVE_LOCAL_ALIGNED_16
+# define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,))
#else
-# define dprintf(pctx, ...)
+# define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED(16, 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)
-
-/* math */
-
-#if ARCH_X86
-#define MASK_ABS(mask, level)\
- __asm__ volatile(\
- "cltd \n\t"\
- "xorl %1, %0 \n\t"\
- "subl %1, %0 \n\t"\
- : "+a" (level), "=&d" (mask)\
- );
+#if HAVE_LOCAL_ALIGNED_32
+# define LOCAL_ALIGNED_32(t, v, ...) E1(LOCAL_ALIGNED_D(32, t, v, __VA_ARGS__,,))
#else
-#define MASK_ABS(mask, level)\
- mask = level >> 31;\
- level = (level ^ mask) - mask;
-#endif
-
-/* avoid usage of dangerous/inappropriate system 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_lfg_get
-#undef srand
-#define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init
-#undef random
-#define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get
-#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
-#ifndef LIBAVFORMAT_BUILD
-#undef printf
-#define printf please_use_av_log_instead_of_printf
-#undef fprintf
-#define fprintf please_use_av_log_instead_of_fprintf
-#undef puts
-#define puts please_use_av_log_instead_of_puts
-#undef perror
-#define perror please_use_av_log_instead_of_perror
+# define LOCAL_ALIGNED_32(t, v, ...) LOCAL_ALIGNED(32, t, v, __VA_ARGS__)
#endif
#define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
{\
p = av_malloc(size);\
- if (p == NULL && (size) != 0) {\
+ if (!(p) && (size) != 0) {\
av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
goto label;\
}\
#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
{\
p = av_mallocz(size);\
- if (p == NULL && (size) != 0) {\
+ if (!(p) && (size) != 0) {\
av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
goto label;\
}\
/**
- * Create a non default alias for a function with specified version.
- * This is needed when symbols are moved from a lib to a dependancy of the lib
- * because the gnu linker as of 2010 is buggy and fails to dynamicaly link if a symbol
- * is not found in the lib in which it was during link time with enabled versioning
- * even if a correctly versioned and matching symbol exists in another lib and
- * even if it did find that would it not contain an explicit check to fail
+ * 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
#endif
+/**
+ * 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
+
+/**
+ * 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);
+
+/**
+ * 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
+#include <crtversion.h>
+#if defined(_VC_CRT_MAJOR_VERSION) && _VC_CRT_MAJOR_VERSION < 14
+#pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_strtod")
+#pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_snprintf")
+#endif
+
+#define avpriv_open ff_open
+#endif
+
+/**
+ * A wrapper for open() setting O_CLOEXEC.
+ */
+int avpriv_open(const char *filename, int flags, ...);
+
+int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt);
+
#endif /* AVUTIL_INTERNAL_H */
projects / ffmpeg / blobdiff