avopt: Check whether the object actually has got an AVClass

[ffmpeg] / libavutil / internal.h

diff --git a/libavutil/internal.h b/libavutil/internal.h
index 75c5156d0faac452b169e14f16449e774776d1c0..49534d4b58a3849d0eb57c371def256322e743e6 100644 (file)
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -39,10 +39,13 @@
 #include "timer.h"
 #include "dict.h"
 
-struct AVDictionary {
-    int count;
-    AVDictionaryEntry *elems;
-};
+#if ARCH_X86
+#   include "x86/emms.h"
+#endif
+
+#ifndef emms_c
+#   define emms_c()
+#endif
 
 #ifndef attribute_align_arg
 #if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2)
@@ -52,45 +55,41 @@ struct AVDictionary {
 #endif
 #endif
 
+#if defined(_MSC_VER) && CONFIG_SHARED
+#    define av_export __declspec(dllimport)
+#else
+#    define av_export
+#endif
+
 #ifndef INT_BIT
 #    define INT_BIT (CHAR_BIT * sizeof(int))
 #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  strncpy
-#define strncpy strncpy_is_forbidden_due_to_security_issues_use_av_strlcpy
-#undef  exit
-#define exit exit_is_forbidden
-#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
-#undef strcasecmp
-#define strcasecmp please_use_av_strcasecmp
-#undef strncasecmp
-#define strncasecmp please_use_av_strncasecmp
+// Some broken preprocessors need a second expansion
+// to be forced to tokenize __VA_ARGS__
+#define E1(x) x
+
+#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)
+
+#define LOCAL_ALIGNED_D(a, t, v, s, o, ...)             \
+    DECLARE_ALIGNED(a, t, la_##v) s o;                  \
+    t (*v) o = la_##v
+
+#define LOCAL_ALIGNED(a, t, v, ...) E1(LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,))
+
+#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
+
+#if HAVE_LOCAL_ALIGNED_16
+#   define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,))
+#else
+#   define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED(16, t, v, __VA_ARGS__)
+#endif
 
 #define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
 {\
@@ -112,6 +111,11 @@ struct AVDictionary {
 
 #include "libm.h"
 
+#if defined(_MSC_VER) && !CONFIG_SHARED
+#pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_strtod")
+#pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_snprintf")
+#endif
+
 /**
  * Return NULL if CONFIG_SMALL is true, otherwise the argument
  * without modification. Used to disable the definition of strings
@@ -163,21 +167,25 @@ struct AVDictionary {
 #   define ONLY_IF_THREADS_ENABLED(x) NULL
 #endif
 
-#if HAVE_MMX && HAVE_INLINE_ASM
 /**
- * Empty mmx state.
- * this must be called between any dsp function and float/double code.
- * for example sin(); dsp->idct_put(); emms_c(); cos()
+ * 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
  */
-static av_always_inline void emms_c(void)
-{
-    __asm__ volatile ("emms" ::: "memory");
-}
-#elif HAVE_MMX && HAVE_MM_EMPTY
-#   include <mmintrin.h>
-#   define emms_c _mm_empty
-#else /* HAVE_MMX */
-#   define emms_c()
-#endif /* HAVE_MMX */
+void avpriv_request_sample(void *avc,
+                           const char *msg, ...) av_printf_format(2, 3);
 
 #endif /* AVUTIL_INTERNAL_H */