#ifndef _INPUT_H
#define _INPUT_H 1
-#include <vector>
+#include <math.h>
+#include <stddef.h>
+#include <time.h>
#include <string>
-class Input {
-public:
- Input(const std::string &stream_id, const std::string &url);
-
- // Connect to the given URL and start streaming.
- void run();
+#include "thread.h"
- // Stop streaming. NOTE: Does not currently work!
- void stop();
+class Input;
+class InputProto;
-private:
- // Recovers the this pointer and calls do_work().
- static void *do_work_thunk(void *arg);
+// Digested statistics for writing to logs etc.
+struct InputStats {
+ std::string url;
- // Actually does the download.
- void do_work();
+ // The number of bytes we have received so far, including any Metacube headers.
+ //
+ // Not reset across connections.
+ size_t bytes_received = 0;
- // Recovers the this pointer and calls curl_callback().
- static size_t curl_callback_thunk(char *ptr, size_t size, size_t nmemb, void *userdata);
+ // The number of data bytes we have received so far (or more precisely,
+ // number of data bytes we have sent on to the stream). This excludes Metacube
+ // headers, metadata and corrupted data we've skipped.
+ //
+ // Not reset across connections.
+ size_t data_bytes_received = 0;
- // Stores the given data, looks for Metacube blocks (skipping data if needed),
- // and calls process_block() for each one.
- void curl_callback(char *ptr, size_t bytes);
- void process_block(const char *data, uint32_t size, uint32_t flags);
+ // Same, except counts only Metacube metadata.
+ size_t metadata_bytes_received = 0;
- // Drops <num_bytes> bytes from the head of <pending_data>,
- // and outputs a warning.
- void drop_pending_data(size_t num_bytes);
+ // When the current connection was initiated. -1 if we are not currently connected.
+ time_t connect_time = -1;
- std::string stream_id;
- std::string url;
+ // Last latency measurement, HUGE_VAL if no measurement yet.
+ double latency_sec = HUGE_VAL;
- // Data we have received but not fully processed yet.
- std::vector<char> pending_data;
+ // TODO: Number of loss events might both be useful,
+ // similar to for clients. Also, per-connection byte counters.
+};
- // If <pending_data> starts with a Metacube header,
- // this is true.
- bool has_metacube_header;
+class Input : public Thread {
+public:
+ // Must be in sync with StreamConfig::Encoding.
+ enum Encoding { INPUT_ENCODING_RAW = 0, INPUT_ENCODING_METACUBE };
- pthread_t worker_thread;
+ virtual ~Input();
+ virtual InputProto serialize() const = 0;
+ virtual std::string get_url() const = 0;
+ virtual void close_socket() = 0;
+ virtual void add_destination(int stream_index) = 0;
- // Whether we should stop or not.
- volatile bool should_stop;
+ // Note: May be called from a different thread, so must be thread-safe.
+ virtual InputStats get_stats() const = 0;
};
+// Extremely rudimentary URL parsing.
+bool parse_url(const std::string &url, std::string *protocol, std::string *user, std::string *host, std::string *port, std::string *path);
+
+// Figure out the right type of input based on the URL, and create a new Input of the right type.
+// Will return nullptr if unknown.
+Input *create_input(const std::string &url, Input::Encoding encoding);
+Input *create_input(const InputProto &serialized);
+
#endif // !defined(_INPUT_H)