// A class dealing with stream output to HTTP.
+#include <assert.h>
#include <atomic>
#include <condition_variable>
#include <deque>
#include <stdint.h>
#include <string>
#include <sys/types.h>
+#include <map>
#include <unordered_map>
#include <utility>
#include <libavutil/rational.h>
}
+#include <microhttpd.h>
+
+#include "shared/shared_defs.h"
+
struct MHD_Connection;
struct MHD_Daemon;
enum StreamType {
MAIN_STREAM,
MULTICAM_STREAM,
- NUM_STREAM_TYPES
+ SIPHON_STREAM // The only one that can have stream_index != 0.
+ };
+ struct StreamID {
+ StreamType type;
+ unsigned index;
+
+ bool operator< (const StreamID &other) const {
+ if (type != other.type)
+ return type < other.type;
+ return index < other.index;
+ }
+ bool operator== (const StreamID &other) const {
+ return (type == other.type && index == other.index);
+ }
};
-
- // Should be called before start().
- void set_header(StreamType stream_type, const std::string &data) {
- header[stream_type] = data;
- }
// Should be called before start() (due to threading issues).
enum CORSPolicy {
void start(int port);
void stop();
- void add_data(StreamType stream_type, const char *buf, size_t size, bool keyframe, int64_t time, AVRational timebase);
+ void set_header(StreamID stream_id, const std::string &data);
+ void add_data(StreamID stream_id, const char *buf, size_t size, bool keyframe, int64_t time, AVRational timebase);
int64_t get_num_connected_clients() const
{
return metric_num_connected_clients.load();
}
+ int64_t get_num_connected_multicam_clients() const {
+ return metric_num_connected_multicam_clients.load();
+ }
+ int64_t get_num_connected_siphon_clients(unsigned stream_idx) const {
+ assert(stream_idx < MAX_VIDEO_CARDS);
+ return metric_num_connected_siphon_clients[stream_idx].load();
+ }
private:
- static int answer_to_connection_thunk(void *cls, MHD_Connection *connection,
- const char *url, const char *method,
- const char *version, const char *upload_data,
- size_t *upload_data_size, void **con_cls);
-
- int answer_to_connection(MHD_Connection *connection,
- const char *url, const char *method,
- const char *version, const char *upload_data,
- size_t *upload_data_size, void **con_cls);
+ // libmicrohttpd 0.9.71 broke the type of MHD_YES/MHD_NO, causing
+ // compilation errors for C++ and undefined behavior for C.
+#if MHD_VERSION >= 0x00097002
+ using MHD_Result = ::MHD_Result;
+#else
+ using MHD_Result = int;
+#endif
+
+ static MHD_Result answer_to_connection_thunk(void *cls, MHD_Connection *connection,
+ const char *url, const char *method,
+ const char *version, const char *upload_data,
+ size_t *upload_data_size, void **con_cls);
+
+ MHD_Result answer_to_connection(MHD_Connection *connection,
+ const char *url, const char *method,
+ const char *version, const char *upload_data,
+ size_t *upload_data_size, void **con_cls);
static void free_stream(void *cls);
FRAMING_RAW,
FRAMING_METACUBE
};
- Stream(HTTPD *parent, Framing framing, StreamType stream_type)
- : parent(parent), framing(framing), stream_type(stream_type) {}
+ Stream(HTTPD *parent, Framing framing, StreamID stream_id)
+ : parent(parent), framing(framing), stream_id(stream_id) {}
static ssize_t reader_callback_thunk(void *cls, uint64_t pos, char *buf, size_t max);
ssize_t reader_callback(uint64_t pos, char *buf, size_t max);
void add_data(const char *buf, size_t size, DataType data_type, int64_t time, AVRational timebase);
void stop();
HTTPD *get_parent() const { return parent; }
- StreamType get_stream_type() const { return stream_type; }
+ StreamID get_stream_id() const { return stream_id; }
private:
HTTPD *parent;
bool should_quit = false; // Under <buffer_mutex>.
std::condition_variable has_buffered_data;
std::deque<std::string> buffered_data; // Protected by <buffer_mutex>.
- size_t used_of_buffered_data = 0; // How many bytes of the first element of <buffered_data> that is already used. Protected by <mutex>.
+ size_t used_of_buffered_data = 0; // How many bytes of the first element of <buffered_data> that is already used. Protected by <buffer_mutex>.
+ size_t buffered_data_bytes = 0; // The sum of all size() in buffered_data. Protected by <buffer_mutex>.
size_t seen_keyframe = false;
- StreamType stream_type;
+ StreamID stream_id;
};
+ void add_data_locked(StreamID stream_id, const char *buf, size_t size, Stream::DataType data_type, int64_t time, AVRational timebase);
+
MHD_Daemon *mhd = nullptr;
std::mutex streams_mutex;
std::set<Stream *> streams; // Not owned.
CORSPolicy cors_policy;
};
std::unordered_map<std::string, Endpoint> endpoints;
- std::string header[NUM_STREAM_TYPES];
+ std::map<StreamID, std::string> header;
// Metrics.
- std::atomic<int64_t> metric_num_connected_clients{ 0 };
+ std::atomic<int64_t> metric_num_connected_clients{0};
+ std::atomic<int64_t> metric_num_connected_multicam_clients{0};
+ std::atomic<int64_t> metric_num_connected_siphon_clients[MAX_VIDEO_CARDS] {{0}};
};
#endif // !defined(_HTTPD_H)