Introduce communication proto and add basic demultiplexer

1 files changed, 41 insertions, 0 deletions

diff --git a/proto.h b/proto.h
new file mode 100644
index 0000000..047d834
--- /dev/null
+++ b/proto.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2023 Mikhail Burakov. This file is part of receiver.
+ *
+ * receiver is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * receiver 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with receiver.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef RECEIVER_PROTO_H_
+#define RECEIVER_PROTO_H_
+
+#include <assert.h>
+#include <stdint.h>
+
+#define PROTO_TYPE_MISC 0
+#define PROTO_TYPE_VIDEO 1
+#define PROTO_TYPE_AUDIO 2
+
+#define PROTO_FLAG_KEYFRAME 1
+
+struct Proto {
+  uint32_t size;
+  uint8_t type;
+  uint8_t flags;
+  uint16_t latency;
+  uint8_t data[];
+};
+
+static_assert(sizeof(struct Proto) == 8 * sizeof(uint8_t),
+              "Suspicious proto struct size");
+
+#endif  // RECEIVER_PROTO_H_