From fe7f23576ac9aa07c91c8ad7f8068329fab9be5e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Mangano?= <frederic.mangano@u-psud.fr>
Date: Tue, 1 Mar 2016 13:29:01 +0100
Subject: [PATCH] ogg: parse magic number

---
 src/ogg.cc | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/ogg.cc b/src/ogg.cc
index 414580f..b4dbf99 100644
--- a/src/ogg.cc
+++ b/src/ogg.cc
@@ -2,6 +2,7 @@
 
 #include <stdexcept>
 #include <fstream>
+#include <cstring>
 
 using namespace opustags;
 
@@ -65,9 +66,13 @@ void ogg::Stream::handle_packet(const ogg_packet &op)
 
 void ogg::Stream::parse_header(const ogg_packet &op)
 {
-    // TODO
-    // set type
-    // set state
+    if (op.bytes >= 8 && memcmp(op.packet, "OpusTags", 8) == 0) {
+        type = OPUS_STREAM;
+        state = HEADER_READY;
+    } else {
+        type = UNKNOWN_STREAM;
+        state = RAW_READY;
+    }
 }
 
 void ogg::Stream::parse_tags(const ogg_packet &op)