diff options
Diffstat (limited to 'libavutil/internal.h')
| -rw-r--r-- | libavutil/internal.h | 169 |
1 files changed, 154 insertions, 15 deletions
diff --git a/libavutil/internal.h b/libavutil/internal.h index 7071d2a587..c77dfa7d3c 100644 --- a/libavutil/internal.h +++ b/libavutil/internal.h @@ -1,20 +1,20 @@ /* * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -30,23 +30,29 @@ # define NDEBUG #endif +// This can be enabled to allow detection of additional integer overflows with ubsan +//#define CHECKED + #include <limits.h> #include <stdint.h> #include <stddef.h> #include <assert.h> #include "config.h" #include "attributes.h" +#include "timer.h" +#include "cpu.h" #include "dict.h" #include "macros.h" #include "mem.h" #include "pixfmt.h" +#include "version.h" #if ARCH_X86 # include "x86/emms.h" #endif #ifndef emms_c -# define emms_c() +# define emms_c() while(0) #endif #ifndef attribute_align_arg @@ -57,22 +63,35 @@ #endif #endif +#if defined(_WIN32) && CONFIG_SHARED && !defined(BUILDING_avutil) +# define av_export_avutil __declspec(dllimport) +#else +# define av_export_avutil +#endif + #if HAVE_PRAGMA_DEPRECATED -# if defined(__ICL) +# if defined(__ICL) || defined (__INTEL_COMPILER) # 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\"") +# define FF_DISABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") +# define FF_ENABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic pop") # endif #else # define FF_DISABLE_DEPRECATION_WARNINGS # define FF_ENABLE_DEPRECATION_WARNINGS #endif + +#define FF_MEMORY_POISON 0x2a + +#define MAKE_ACCESSORS(str, name, type, field) \ + type av_##name##_get_##field(const str *s) { return s->field; } \ + void av_##name##_set_##field(str *s, type v) { s->field = v; } + // Some broken preprocessors need a second expansion // to be forced to tokenize __VA_ARGS__ #define E1(x) x @@ -94,19 +113,25 @@ #define LOCAL_ALIGNED(a, t, v, ...) LOCAL_ALIGNED_##a(t, v, __VA_ARGS__) -#if HAVE_LOCAL_ALIGNED_8 +#if HAVE_LOCAL_ALIGNED +# define LOCAL_ALIGNED_4(t, v, ...) E1(LOCAL_ALIGNED_D(4, t, v, __VA_ARGS__,,)) +#else +# define LOCAL_ALIGNED_4(t, v, ...) E1(LOCAL_ALIGNED_A(4, t, v, __VA_ARGS__,,)) +#endif + +#if HAVE_LOCAL_ALIGNED # define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,)) #else # define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_A(8, t, v, __VA_ARGS__,,)) #endif -#if HAVE_LOCAL_ALIGNED_16 +#if HAVE_LOCAL_ALIGNED # define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,)) #else # define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_A(16, t, v, __VA_ARGS__,,)) #endif -#if HAVE_LOCAL_ALIGNED_32 +#if HAVE_LOCAL_ALIGNED # define LOCAL_ALIGNED_32(t, v, ...) E1(LOCAL_ALIGNED_D(32, t, v, __VA_ARGS__,,)) #else # define LOCAL_ALIGNED_32(t, v, ...) E1(LOCAL_ALIGNED_A(32, t, v, __VA_ARGS__,,)) @@ -130,6 +155,24 @@ }\ } +#define FF_ALLOC_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)\ +{\ + p = av_malloc_array(nelem, elsize);\ + if (!p) {\ + av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\ + goto label;\ + }\ +} + +#define FF_ALLOCZ_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)\ +{\ + p = av_mallocz_array(nelem, elsize);\ + if (!p) {\ + av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\ + goto label;\ + }\ +} + #include "libm.h" /** @@ -143,12 +186,11 @@ # 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 + * FFmpeg 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. @@ -207,18 +249,115 @@ void avpriv_request_sample(void *avc, #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") +#pragma comment(linker, "/include:" EXTERN_PREFIX "avpriv_strtod") +#pragma comment(linker, "/include:" EXTERN_PREFIX "avpriv_snprintf") #endif #define avpriv_open ff_open +#define avpriv_tempfile ff_tempfile +#define PTRDIFF_SPECIFIER "Id" +#define SIZE_SPECIFIER "Iu" +#else +#define PTRDIFF_SPECIFIER "td" +#define SIZE_SPECIFIER "zu" #endif +#ifdef DEBUG +# define ff_dlog(ctx, ...) av_log(ctx, AV_LOG_DEBUG, __VA_ARGS__) +#else +# define ff_dlog(ctx, ...) do { if (0) av_log(ctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0) +#endif + +// For debuging we use signed operations so overflows can be detected (by ubsan) +// For production we use unsigned so there are no undefined operations +#ifdef CHECKED +#define SUINT int +#define SUINT32 int32_t +#else +#define SUINT unsigned +#define SUINT32 uint32_t +#endif + +/** + * Clip and convert a double value into the long long amin-amax range. + * This function is needed because conversion of floating point to integers when + * it does not fit in the integer's representation does not necessarily saturate + * correctly (usually converted to a cvttsd2si on x86) which saturates numbers + * > INT64_MAX to INT64_MIN. The standard marks such conversions as undefined + * behavior, allowing this sort of mathematically bogus conversions. This provides + * a safe alternative that is slower obviously but assures safety and better + * mathematical behavior. + * @param a value to clip + * @param amin minimum value of the clip range + * @param amax maximum value of the clip range + * @return clipped value + */ +static av_always_inline av_const int64_t ff_rint64_clip(double a, int64_t amin, int64_t amax) +{ + int64_t res; +#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2 + if (amin > amax) abort(); +#endif + // INT64_MAX+1,INT64_MIN are exactly representable as IEEE doubles + // do range checks first + if (a >= 9223372036854775808.0) + return amax; + if (a <= -9223372036854775808.0) + return amin; + + // safe to call llrint and clip accordingly + res = llrint(a); + if (res > amax) + return amax; + if (res < amin) + return amin; + return res; +} + /** * A wrapper for open() setting O_CLOEXEC. */ +av_warn_unused_result int avpriv_open(const char *filename, int flags, ...); +/** + * Wrapper to work around the lack of mkstemp() on mingw. + * Also, tries to create file in /tmp first, if possible. + * *prefix can be a character constant; *filename will be allocated internally. + * @return file descriptor of opened file (or negative value corresponding to an + * AVERROR code on error) + * and opened file name in **filename. + * @note On very old libcs it is necessary to set a secure umask before + * calling this, av_tempfile() can't call umask itself as it is used in + * libraries and could interfere with the calling application. + */ +int avpriv_tempfile(const char *prefix, char **filename, int log_offset, void *log_ctx); + int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt); +static av_always_inline av_const int avpriv_mirror(int x, int w) +{ + if (!w) + return 0; + + while ((unsigned)x > (unsigned)w) { + x = -x; + if (x < 0) + x += 2 * w; + } + return x; +} + +void ff_check_pixfmt_descriptors(void); + +/** + * Set a dictionary value to an ISO-8601 compliant timestamp string. + * + * @param s AVFormatContext + * @param key metadata key + * @param timestamp unix timestamp in microseconds + * @return <0 on error + */ +int avpriv_dict_set_timestamp(AVDictionary **dict, const char *key, int64_t timestamp); + #endif /* AVUTIL_INTERNAL_H */ |