avformat/avio: Add Metacube support

[ffmpeg] / libavformat / metacube2.h

diff --git a/libavformat/metacube2.h b/libavformat/metacube2.h
new file mode 100644 (file)
index 0000000..ada0031
--- /dev/null
+++ b/libavformat/metacube2.h
@@ -0,0 +1,35 @@
+#ifndef AVFORMAT_METACUBE2_H
+#define AVFORMAT_METACUBE2_H
+
+/*
+ * Definitions for the Metacube2 protocol, used to communicate with Cubemap.
+ *
+ * Note: This file is meant to compile as both C and C++, for easier inclusion
+ * in other projects.
+ */
+
+#include <stdint.h>
+
+#define METACUBE2_SYNC "cube!map"  /* 8 bytes long. */
+#define METACUBE_FLAGS_HEADER 0x1  /* NOTE: Replaces the previous header. */
+#define METACUBE_FLAGS_NOT_SUITABLE_FOR_STREAM_START 0x2
+
+/*
+ * Metadata packets; should not be counted as data, but rather
+ * parsed (or ignored if you don't understand them).
+ *
+ * Metadata packets start with a uint64_t (network byte order)
+ * that describe the type; the rest is defined by the type.
+ */
+#define METACUBE_FLAGS_METADATA 0x4
+
+struct metacube2_block_header {
+       char sync[8];    /* METACUBE2_SYNC */
+       uint32_t size;   /* Network byte order. Does not include header. */
+       uint16_t flags;  /* Network byte order. METACUBE_FLAGS_*. */
+       uint16_t csum;   /* Network byte order. CRC16 of size and flags.
+                            If METACUBE_FLAGS_METADATA is set, inverted
+                            so that older clients will ignore it as broken. */
+};
+
+#endif /* AVFORMAT_METACUBE2_H */