/*
* 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 libavutil/internal.h
+ * @file
* common internal API header
*/
#include <stddef.h>
#include <assert.h>
#include "config.h"
-#include "common.h"
-#include "mem.h"
+#include "attributes.h"
#include "timer.h"
+#include "dict.h"
+
+struct AVDictionary {
+ int count;
+ AVDictionaryEntry *elems;
+};
#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
-#ifndef attribute_used
-#if AV_GCC_VERSION_AT_LEAST(3,1)
-# define attribute_used __attribute__((used))
-#else
-# define attribute_used
-#endif
-#endif
-
#ifndef INT16_MIN
#define INT16_MIN (-0x7fff - 1)
#endif
/* debug stuff */
-/* 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 uint8_t ff_sqrt_tab[256];
-
-static inline av_const unsigned int ff_sqrt(unsigned int a)
-{
- unsigned int b;
-
- if (a < 255) return (ff_sqrt_tab[a + 1] - 1) >> 4;
- else if (a < (1 << 12)) b = ff_sqrt_tab[a >> 4] >> 2;
-#if !CONFIG_SMALL
- else if (a < (1 << 14)) b = ff_sqrt_tab[a >> 6] >> 1;
- else if (a < (1 << 16)) b = ff_sqrt_tab[a >> 8] ;
-#endif
- else {
- int s = av_log2_16bit(a >> 16) >> 1;
- unsigned int c = a >> (s + 2);
- b = ff_sqrt_tab[c >> (s + 8)];
- b = FASTDIV(c,b) + (b << s);
- }
-
- return b - (a < b * b);
-}
-
#if ARCH_X86
#define MASK_ABS(mask, level)\
__asm__ volatile(\
#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 strncpy
+#define strncpy strncpy_is_forbidden_due_to_security_issues_use_av_strlcpy
#undef exit
#define exit exit_is_forbidden
-#ifndef LIBAVFORMAT_BUILD
#undef printf
#define printf please_use_av_log_instead_of_printf
#undef fprintf
#define puts please_use_av_log_instead_of_puts
#undef perror
#define perror please_use_av_log_instead_of_perror
-#endif
+#undef strcasecmp
+#define strcasecmp please_use_av_strcasecmp
+#undef strncasecmp
+#define strncasecmp please_use_av_strncasecmp
#define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
{\
}\
}
-#if !HAVE_EXP2
-#undef exp2
-#define exp2(x) exp((x) * 0.693147180559945)
-#endif /* HAVE_EXP2 */
-
-#if !HAVE_EXP2F
-#undef exp2f
-#define exp2f(x) exp2(x)
-#endif /* HAVE_EXP2F */
-
-#if !HAVE_LLRINT
-static av_always_inline av_const long long llrint(double x)
-{
- return rint(x);
-}
-#endif /* HAVE_LLRINT */
-
-#if !HAVE_LOG2
-#undef log2
-#define log2(x) (log(x) * 1.44269504088896340736)
-#endif /* HAVE_LOG2 */
-
-#if !HAVE_LOG2F
-#undef log2f
-#define log2f(x) log2(x)
-#endif /* HAVE_LOG2F */
-
-#if !HAVE_LRINT
-static av_always_inline av_const long int lrint(double x)
-{
- return rint(x);
-}
-#endif /* HAVE_LRINT */
-
-#if !HAVE_LRINTF
-static av_always_inline av_const long int lrintf(float x)
-{
- return (int)(rint(x));
-}
-#endif /* HAVE_LRINTF */
-
-#if !HAVE_ROUND
-static av_always_inline av_const double round(double x)
-{
- return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
-}
-#endif /* HAVE_ROUND */
-
-#if !HAVE_ROUNDF
-static av_always_inline av_const float roundf(float x)
-{
- return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
-}
-#endif /* HAVE_ROUNDF */
-
-#if !HAVE_TRUNCF
-static av_always_inline av_const float truncf(float x)
-{
- return (x > 0) ? floor(x) : ceil(x);
-}
-#endif /* HAVE_TRUNCF */
+#include "libm.h"
/**
- * Returns NULL if CONFIG_SMALL is true, otherwise the argument
+ * Return NULL if CONFIG_SMALL is true, otherwise the argument
* without modification. Used to disable the definition of strings
* (for example AVCodec long_names).
*/
# define NULL_IF_CONFIG_SMALL(x) x
#endif
+
+/**
+ * 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
+
+/**
+ * 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
+
+#if HAVE_MMX
+/**
+ * Empty mmx state.
+ * this must be called between any dsp function and float/double code.
+ * for example sin(); dsp->idct_put(); emms_c(); cos()
+ */
+static av_always_inline void emms_c(void)
+{
+ __asm__ volatile ("emms" ::: "memory");
+}
+#else /* HAVE_MMX */
+#define emms_c()
+#endif /* HAVE_MMX */
+
#endif /* AVUTIL_INTERNAL_H */
projects / ffmpeg / blobdiff