From 89383cff1ba5d8a928262fcb4c40382a981c78c8 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Fri, 11 Jun 2021 04:51:03 +0200
Subject: Remove dependency on youtube-dl for streaming youtube, resulting in
 faster video startup

---
 plugins/youtube/Signature.hpp | 46 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 plugins/youtube/Signature.hpp

(limited to 'plugins/youtube/Signature.hpp')

diff --git a/plugins/youtube/Signature.hpp b/plugins/youtube/Signature.hpp
new file mode 100644
index 0000000..7456615
--- /dev/null
+++ b/plugins/youtube/Signature.hpp
@@ -0,0 +1,46 @@
+#pragma once
+
+#include "../../include/AsyncTask.hpp"
+#include <string>
+#include <vector>
+#include <map>
+#include <mutex>
+#include <time.h>
+
+namespace QuickMedia {
+    // Thread safe
+    class YoutubeSignatureDecryptor {
+    public:
+        static YoutubeSignatureDecryptor& get_instance();
+        bool decrypt(const std::string &s, const std::string &sp, std::string &sig_key, std::string &sig_value);
+    private:
+        YoutubeSignatureDecryptor();
+        ~YoutubeSignatureDecryptor();
+        YoutubeSignatureDecryptor(const YoutubeSignatureDecryptor&) = delete;
+        YoutubeSignatureDecryptor& operator=(const YoutubeSignatureDecryptor&) = delete;
+
+        struct DecryptFuncCall {
+            std::string func_name;
+            long arg;
+        };
+
+        enum class DecryptFunction {
+            REVERSE,
+            SPLICE,
+            SWAP
+        };
+
+        bool js_code_to_operations(const std::string &function_body_str, const std::string &var_body_str, std::vector<DecryptFuncCall> &new_func_calls, std::map<std::string, DecryptFunction> &new_func_decls);
+        int update_decrypt_function();
+    private:
+        AsyncTask<void> poll_task;
+        std::mutex update_signature_mutex;
+        std::string decryption_function;
+        time_t decrypt_function_last_updated = 0;
+        bool running = false;
+        bool up_to_date = false;
+
+        std::vector<DecryptFuncCall> func_calls;
+        std::map<std::string, DecryptFunction> func_decls;
+    };
+}
\ No newline at end of file
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