document the fact that av_new_stream() can't be called in a background thread

[ffmpeg] / libavutil / intreadwrite.h

diff --git a/libavutil/intreadwrite.h b/libavutil/intreadwrite.h
index 7565ef711e8c5c35454162677adb047d3cbbbf45..1849a64661c51ca4e598e5bd8a42c0571fb155ec 100644 (file)
--- a/libavutil/intreadwrite.h
+++ b/libavutil/intreadwrite.h
@@ -20,9 +20,9 @@
 #define AVUTIL_INTREADWRITE_H
 
 #include <stdint.h>
-#include "config.h"
+#include "libavutil/avconfig.h"
+#include "attributes.h"
 #include "bswap.h"
-#include "common.h"
 
 typedef union {
     uint64_t u64;
@@ -52,6 +52,10 @@ typedef union {
  * as inline functions.
  */
 
+#ifdef HAVE_AV_CONFIG_H
+
+#include "config.h"
+
 #if   ARCH_ARM
 #   include "arm/intreadwrite.h"
 #elif ARCH_AVR32
@@ -60,15 +64,19 @@ typedef union {
 #   include "mips/intreadwrite.h"
 #elif ARCH_PPC
 #   include "ppc/intreadwrite.h"
+#elif ARCH_TOMI
+#   include "tomi/intreadwrite.h"
 #elif ARCH_X86
 #   include "x86/intreadwrite.h"
 #endif
 
+#endif /* HAVE_AV_CONFIG_H */
+
 /*
  * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
  */
 
-#if HAVE_BIGENDIAN
+#if AV_HAVE_BIGENDIAN
 
 #   if    defined(AV_RN16) && !defined(AV_RB16)
 #       define AV_RB16(p) AV_RN16(p)
@@ -118,7 +126,7 @@ typedef union {
 #       define AV_WN64(p, v) AV_WB64(p, v)
 #   endif
 
-#else /* HAVE_BIGENDIAN */
+#else /* AV_HAVE_BIGENDIAN */
 
 #   if    defined(AV_RN16) && !defined(AV_RL16)
 #       define AV_RL16(p) AV_RN16(p)
@@ -168,14 +176,14 @@ typedef union {
 #       define AV_WN64(p, v) AV_WL64(p, v)
 #   endif
 
-#endif /* !HAVE_BIGENDIAN */
+#endif /* !AV_HAVE_BIGENDIAN */
 
 /*
  * Define AV_[RW]N helper macros to simplify definitions not provided
  * by per-arch headers.
  */
 
-#if   HAVE_ATTRIBUTE_PACKED
+#if defined(__GNUC__) && !defined(__TI_COMPILER_VERSION__)
 
 union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;
 union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;
@@ -189,10 +197,10 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
 #   define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
 #   define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
 
-#elif HAVE_FAST_UNALIGNED
+#elif AV_HAVE_FAST_UNALIGNED
 
 #   define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)
-#   define AV_WN(s, p, v) (((uint##s##_t*)(p))->u##s = (v))
+#   define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v))
 
 #else
 
@@ -300,7 +308,7 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
     } while(0)
 #endif
 
-#if HAVE_BIGENDIAN
+#if AV_HAVE_BIGENDIAN
 #   define AV_RN(s, p)    AV_RB##s(p)
 #   define AV_WN(s, p, v) AV_WB##s(p, v)
 #else
@@ -334,14 +342,14 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
 #   define AV_WN64(p, v) AV_WN(64, p, v)
 #endif
 
-#if HAVE_BIGENDIAN
+#if AV_HAVE_BIGENDIAN
 #   define AV_RB(s, p)    AV_RN##s(p)
 #   define AV_WB(s, p, v) AV_WN##s(p, v)
-#   define AV_RL(s, p)    bswap_##s(AV_RN##s(p))
-#   define AV_WL(s, p, v) AV_WN##s(p, bswap_##s(v))
+#   define AV_RL(s, p)    av_bswap##s(AV_RN##s(p))
+#   define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))
 #else
-#   define AV_RB(s, p)    bswap_##s(AV_RN##s(p))
-#   define AV_WB(s, p, v) AV_WN##s(p, bswap_##s(v))
+#   define AV_RB(s, p)    av_bswap##s(AV_RN##s(p))
+#   define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))
 #   define AV_RL(s, p)    AV_RN##s(p)
 #   define AV_WL(s, p, v) AV_WN##s(p, v)
 #endif
@@ -422,6 +430,38 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
     } while(0)
 #endif
 
+/*
+ * The AV_[RW]NA macros access naturally aligned data
+ * in a type-safe way.
+ */
+
+#define AV_RNA(s, p)    (((const av_alias##s*)(p))->u##s)
+#define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))
+
+#ifndef AV_RN16A
+#   define AV_RN16A(p) AV_RNA(16, p)
+#endif
+
+#ifndef AV_RN32A
+#   define AV_RN32A(p) AV_RNA(32, p)
+#endif
+
+#ifndef AV_RN64A
+#   define AV_RN64A(p) AV_RNA(64, p)
+#endif
+
+#ifndef AV_WN16A
+#   define AV_WN16A(p, v) AV_WNA(16, p, v)
+#endif
+
+#ifndef AV_WN32A
+#   define AV_WN32A(p, v) AV_WNA(32, p, v)
+#endif
+
+#ifndef AV_WN64A
+#   define AV_WN64A(p, v) AV_WNA(64, p, v)
+#endif
+
 /* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
  * naturally aligned. They may be implemented using MMX,
  * so emms_c() must be called before using any float code
@@ -431,6 +471,10 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
 #define AV_COPY(n, d, s) \
     (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
 
+#ifndef AV_COPY16
+#   define AV_COPY16(d, s) AV_COPY(16, d, s)
+#endif
+
 #ifndef AV_COPY32
 #   define AV_COPY32(d, s) AV_COPY(32, d, s)
 #endif
@@ -455,6 +499,10 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
 
 #define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)
 
+#ifndef AV_ZERO16
+#   define AV_ZERO16(d) AV_ZERO(16, d)
+#endif
+
 #ifndef AV_ZERO32
 #   define AV_ZERO32(d) AV_ZERO(32, d)
 #endif