// Representation of a single, muxed (we only really care about bytes/blocks) stream.
// Fed by Input, sent out by Server (to Client).
+#include <stddef.h>
#include <stdint.h>
+#include <sys/types.h>
+#include <sys/uio.h>
#include <string>
#include <vector>
-class Client;
class MarkPool;
class StreamProto;
+struct Client;
struct Stream {
- Stream(const std::string &stream_id, size_t backlog_size);
+ // Must be in sync with StreamConfig::Encoding.
+ enum Encoding { STREAM_ENCODING_RAW = 0, STREAM_ENCODING_METACUBE };
+
+ Stream(const std::string &stream_id, size_t backlog_size, Encoding encoding);
~Stream();
// Serialization/deserialization.
- Stream(const StreamProto &serialized);
+ Stream(const StreamProto &serialized, int data_fd);
StreamProto serialize();
- std::string stream_id;
+ // Changes the backlog size, restructuring the data as needed.
+ void set_backlog_size(size_t new_size);
+
+ std::string url;
+
+ // The HTTP response header, without the trailing double newline.
+ std::string http_header;
+
+ // The video stream header (if any).
+ std::string stream_header;
- // The HTTP response header, plus the video stream header (if any).
- std::string header;
+ // What encoding we apply to the outgoing data (usually raw, but can also
+ // be Metacube, for reflecting to another Cubemap instance).
+ Encoding encoding;
// The stream data itself, stored in a circular buffer.
//
// What pool to fetch marks from, or NULL.
MarkPool *mark_pool;
+ // Queued data, if any. Protected by the owning Server's <queued_data_mutex>.
+ // The data pointers in the iovec are owned by us.
+ std::vector<iovec> queued_data;
+
// Put client to sleep, since there is no more data for it; we will on
// longer listen on POLLOUT until we get more data. Also, it will be put
// in the list of clients to wake up when we do.
void put_client_to_sleep(Client *client);
- // We have more data, so mark all clients that are sleeping as ready to go.
- void wake_up_all_clients();
+ // Add more data to <queued_data>, adding Metacube headers if needed.
+ // Does not take ownership of <data>.
+ // You should hold the owning Server's <queued_data_mutex>.
+ void add_data_deferred(const char *data, size_t bytes);
+
+ // Add queued data to the stream, if any.
+ // You should hold the owning Server's <mutex> _and_ <queued_data_mutex>.
+ void process_queued_data();
private:
Stream(const Stream& other);
+
+ // Adds data directly to the stream file descriptor, without adding headers or
+ // going through <queued_data>.
+ // You should hold the owning Server's <mutex>.
+ void add_data_raw(const std::vector<iovec> &data);
};
#endif // !defined(_STREAM_H)