1 files changed, 99 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavutil/intreadwrite.h b/contrib/ffmpeg/libavutil/intreadwrite.h
new file mode 100644
index 000000000..7225f0b67
--- /dev/null
+++ b/contrib/ffmpeg/libavutil/intreadwrite.h
@@ -0,0 +1,99 @@
+/*
+ * 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 INTREADWRITE_H
+#define INTREADWRITE_H
+
+#ifdef __GNUC__
+
+struct unaligned_64 { uint64_t l; } __attribute__((packed));
+struct unaligned_32 { uint32_t l; } __attribute__((packed));
+struct unaligned_16 { uint16_t l; } __attribute__((packed));
+
+#define LD16(a) (((const struct unaligned_16 *) (a))->l)
+#define LD32(a) (((const struct unaligned_32 *) (a))->l)
+#define LD64(a) (((const struct unaligned_64 *) (a))->l)
+
+#define ST16(a, b) (((struct unaligned_16 *) (a))->l) = (b)
+#define ST32(a, b) (((struct unaligned_32 *) (a))->l) = (b)
+
+#else /* __GNUC__ */
+
+#define LD16(a) (*((uint16_t*)(a)))
+#define LD32(a) (*((uint32_t*)(a)))
+#define LD64(a) (*((uint64_t*)(a)))
+
+#define ST16(a, b) *((uint16_t*)(a)) = (b)
+#define ST32(a, b) *((uint32_t*)(a)) = (b)
+
+#endif /* !__GNUC__ */
+
+/* endian macros */
+#define AV_RB8(x)  (((uint8_t*)(x))[0])
+#define AV_WB8(p, d)  { ((uint8_t*)(p))[0] = (d); }
+
+#define AV_RB16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
+#define AV_WB16(p, d) { \
+                    ((uint8_t*)(p))[1] = (d); \
+                    ((uint8_t*)(p))[0] = (d)>>8; }
+
+#define AV_RB24(x) ((((uint8_t*)(x))[0] << 16) | \
+                    (((uint8_t*)(x))[1] << 8) | \
+                     ((uint8_t*)(x))[2])
+#define AV_WB24(p, d) { \
+                    ((uint8_t*)(p))[2] = (d); \
+                    ((uint8_t*)(p))[1] = (d)>>8; \
+                    ((uint8_t*)(p))[0] = (d)>>16; }
+
+#define AV_RB32(x) ((((uint8_t*)(x))[0] << 24) | \
+                   (((uint8_t*)(x))[1] << 16) | \
+                   (((uint8_t*)(x))[2] << 8) | \
+                    ((uint8_t*)(x))[3])
+#define AV_WB32(p, d) { \
+                    ((uint8_t*)(p))[3] = (d); \
+                    ((uint8_t*)(p))[2] = (d)>>8; \
+                    ((uint8_t*)(p))[1] = (d)>>16; \
+                    ((uint8_t*)(p))[0] = (d)>>24; }
+
+#define AV_RL8(x)  AV_RB8(x)
+#define AV_WL8(p, d)  AV_WB8(p, d)
+
+#define AV_RL16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
+#define AV_WL16(p, d) { \
+                    ((uint8_t*)(p))[0] = (d); \
+                    ((uint8_t*)(p))[1] = (d)>>8; }
+
+#define AV_RL24(x) ((((uint8_t*)(x))[2] << 16) | \
+                    (((uint8_t*)(x))[1] << 8) | \
+                     ((uint8_t*)(x))[0])
+#define AV_WL24(p, d) { \
+                    ((uint8_t*)(p))[0] = (d); \
+                    ((uint8_t*)(p))[1] = (d)>>8; \
+                    ((uint8_t*)(p))[2] = (d)>>16; }
+
+#define AV_RL32(x) ((((uint8_t*)(x))[3] << 24) | \
+                   (((uint8_t*)(x))[2] << 16) | \
+                   (((uint8_t*)(x))[1] << 8) | \
+                    ((uint8_t*)(x))[0])
+#define AV_WL32(p, d) { \
+                    ((uint8_t*)(p))[0] = (d); \
+                    ((uint8_t*)(p))[1] = (d)>>8; \
+                    ((uint8_t*)(p))[2] = (d)>>16; \
+                    ((uint8_t*)(p))[3] = (d)>>24; }
+
+#endif /* INTREADWRITE_H */