1 files changed, 78 insertions, 0 deletions
diff --git a/ffmpeg_files/arm/intreadwrite.h b/ffmpeg_files/arm/intreadwrite.h
new file mode 100644
index 0000000000..34b5ec8e4a
--- /dev/null
+++ b/ffmpeg_files/arm/intreadwrite.h
@@ -0,0 +1,78 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * 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.
+ *
+ * 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef MP_AVUTIL_ARM_INTREADWRITE_H
+#define MP_AVUTIL_ARM_INTREADWRITE_H
+
+#include <stdint.h>
+#include "config.h"
+
+#if HAVE_FAST_UNALIGNED && HAVE_INLINE_ASM
+
+#define AV_RN16 AV_RN16
+static inline uint16_t AV_RN16(const void *p)
+{
+    uint16_t v;
+    __asm__ ("ldrh %0, %1" : "=r"(v) : "m"(*(const uint16_t *)p));
+    return v;
+}
+
+#define AV_WN16 AV_WN16
+static inline void AV_WN16(void *p, uint16_t v)
+{
+    __asm__ ("strh %1, %0" : "=m"(*(uint16_t *)p) : "r"(v));
+}
+
+#define AV_RN32 AV_RN32
+static inline uint32_t AV_RN32(const void *p)
+{
+    uint32_t v;
+    __asm__ ("ldr  %0, %1" : "=r"(v) : "m"(*(const uint32_t *)p));
+    return v;
+}
+
+#define AV_WN32 AV_WN32
+static inline void AV_WN32(void *p, uint32_t v)
+{
+    __asm__ ("str  %1, %0" : "=m"(*(uint32_t *)p) : "r"(v));
+}
+
+#define AV_RN64 AV_RN64
+static inline uint64_t AV_RN64(const void *p)
+{
+    union { uint64_t v; uint32_t hl[2]; } v;
+    __asm__ ("ldr   %0, %2  \n\t"
+             "ldr   %1, %3  \n\t"
+             : "=r"(v.hl[0]), "=r"(v.hl[1])
+             : "m"(*(const uint32_t*)p), "m"(*((const uint32_t*)p+1)));
+    return v.v;
+}
+
+#define AV_WN64 AV_WN64
+static inline void AV_WN64(void *p, uint64_t v)
+{
+    union { uint64_t v; uint32_t hl[2]; } vv = { v };
+    __asm__ ("str  %2, %0  \n\t"
+             "str  %3, %1  \n\t"
+             : "=m"(*(uint32_t*)p), "=m"(*((uint32_t*)p+1))
+             : "r"(vv.hl[0]), "r"(vv.hl[1]));
+}
+
+#endif /* HAVE_INLINE_ASM */
+
+#endif /* AVUTIL_ARM_INTREADWRITE_H */