#include <sys/socket.h>
#include <pthread.h>
#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/epoll.h>
#include <errno.h>
#include <vector>
#include <string>
#include <map>
+
#include "metacube.h"
+#include "server.h"
#define NUM_SERVERS 4
#define STREAM_ID "stream"
#define STREAM_URL "http://gruessi.zrh.sesse.net:4013/"
-#define BACKLOG_SIZE 1048576
#define PORT 9094
using namespace std;
-// Locks a pthread mutex, RAII-style.
-class MutexLock {
-public:
- MutexLock(pthread_mutex_t *mutex);
- ~MutexLock();
-
-private:
- pthread_mutex_t *mutex;
-};
-
-MutexLock::MutexLock(pthread_mutex_t *mutex)
- : mutex(mutex)
-{
- pthread_mutex_lock(mutex);
-}
-
-MutexLock::~MutexLock()
-{
- pthread_mutex_unlock(mutex);
-}
-
-struct Client {
- enum State { READING_REQUEST, SENDING_HEADER, SENDING_DATA };
- State state;
-
- // The HTTP request, as sent by the client. If we are in READING_REQUEST,
- // this might not be finished.
- string client_request;
-
-#if 0
- // What stream we're connecting to; parsed from client_request.
- // Not relevant for READING_REQUEST.
- string stream_id;
-#endif
-
- // Number of bytes we've sent of the header. Only relevant for SENDING_HEADER.
- size_t header_bytes_sent;
-
- // Number of bytes we've sent of data. Only relevant for SENDING_DATA.
- size_t bytes_sent;
-};
-
-struct Stream {
- // The HTTP response header, plus the video stream header (if any).
- string header;
-
- // The stream data itself, stored in a circular buffer.
- char data[BACKLOG_SIZE];
-
- // How many bytes <data> contains. Can very well be larger than BACKLOG_SIZE,
- // since the buffer wraps.
- size_t data_size;
-};
+Server *servers = NULL;
-class Server {
+class Input {
public:
- Server();
+ Input(const string &stream_id);
- // Start a new thread that handles clients.
- void run();
- void add_socket(int server_sock);
- void add_stream(const string &stream_id);
- void set_header(const string &stream_id, const string &header);
- void add_data(const string &stream_id, const char *data, size_t bytes);
+ // Connect to the given URL and start streaming.
+ // WARNING: Currently this blocks; it does not run in a separate thread!
+ void run(const string &url);
private:
- pthread_mutex_t mutex;
- map<string, Stream> streams;
-
- // Recover the this pointer, and call do_work().
- static void *do_work_thunk(void *arg);
-
- // The actual worker thread.
- void do_work();
-};
-
-Server::Server()
-{
- pthread_mutex_init(&mutex, NULL);
-}
-
-void Server::run()
-{
- pthread_t thread;
- pthread_create(&thread, NULL, Server::do_work_thunk, this);
-}
-
-void *Server::do_work_thunk(void *arg)
-{
- Server *server = static_cast<Server *>(arg);
- server->do_work();
- return NULL;
-}
-
-void Server::do_work()
-{
- for ( ;; ) {
- printf("server thread running\n");
- sleep(1);
- }
-}
+ // Recovers the this pointer and calls curl_callback().
+ static size_t curl_callback_thunk(char *ptr, size_t size, size_t nmemb, void *userdata);
-class Input {
-public:
- Input();
+ // 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);
-
-private:
void process_block(const char *data, uint32_t size, uint32_t flags);
+
+ // Drops <num_bytes> bytes from the head of <pending_data>,
+ // and outputs a warning.
void drop_pending_data(size_t num_bytes);
+ string stream_id;
+
// Data we have received but not fully processed yet.
vector<char> pending_data;
bool has_metacube_header;
};
-Input::Input()
- : has_metacube_header(false)
+Input::Input(const string &stream_id)
+ : stream_id(stream_id),
+ has_metacube_header(false)
+{
+}
+
+void Input::run(const string &url)
+{
+ CURL *curl = curl_easy_init();
+ curl_easy_setopt(curl, CURLOPT_URL, STREAM_URL);
+ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &Input::curl_callback_thunk);
+ curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
+ curl_easy_perform(curl);
+}
+
+size_t Input::curl_callback_thunk(char *ptr, size_t size, size_t nmemb, void *userdata)
{
+ Input *input = static_cast<Input *>(userdata);
+ size_t bytes = size * nmemb;
+ input->curl_callback(ptr, bytes);
+ return bytes;
}
void Input::curl_callback(char *ptr, size_t bytes)
}
void Input::process_block(const char *data, uint32_t size, uint32_t flags)
-{
- // TODO: treat it right here
- printf("Block: %d bytes, flags=0x%x\n", size, flags);
+{
+ if (flags & METACUBE_FLAGS_HEADER) {
+ string header(data, data + size);
+ for (int i = 0; i < NUM_SERVERS; ++i) {
+ servers[i].set_header(stream_id, header);
+ }
+ } else {
+ for (int i = 0; i < NUM_SERVERS; ++i) {
+ servers[i].add_data(stream_id, data, size);
+ }
+ }
}
void Input::drop_pending_data(size_t num_bytes)
pending_data.erase(pending_data.begin(), pending_data.begin() + num_bytes);
}
-size_t curl_callback(char *ptr, size_t size, size_t nmemb, void *userdata)
-{
- Input *input = static_cast<Input *>(userdata);
- size_t bytes = size * nmemb;
- input->curl_callback(ptr, bytes);
- return bytes;
-}
-
int create_server_socket(int port)
{
int server_sock = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
void *acceptor_thread_run(void *arg)
{
int server_sock = int(intptr_t(arg));
+ int num_accepted = 0;
for ( ;; ) {
sockaddr_in6 addr;
socklen_t addrlen = sizeof(addr);
+ // Get a new socket.
int sock = accept(server_sock, reinterpret_cast<sockaddr *>(&addr), &addrlen);
if (sock == -1 && errno == EINTR) {
continue;
exit(1);
}
- printf("got a socket yaaaay\n");
+ // Set the socket as nonblocking.
+ int one = 1;
+ if (ioctl(sock, FIONBIO, &one) == -1) {
+ perror("FIONBIO");
+ exit(1);
+ }
+
+ // Pick a server, round-robin, and hand over the socket to it.
+ servers[num_accepted % NUM_SERVERS].add_client(sock);
+ ++num_accepted;
}
}
-Server *servers = NULL;
-
int main(int argc, char **argv)
{
servers = new Server[NUM_SERVERS];
for (int i = 0; i < NUM_SERVERS; ++i) {
+ servers[i].add_stream(STREAM_ID);
servers[i].run();
}
pthread_t acceptor_thread;
pthread_create(&acceptor_thread, NULL, acceptor_thread_run, reinterpret_cast<void *>(server_sock));
- Input input;
- CURL *curl = curl_easy_init();
- curl_easy_setopt(curl, CURLOPT_URL, STREAM_URL);
- curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_callback);
- curl_easy_setopt(curl, CURLOPT_WRITEDATA, &input);
- curl_easy_perform(curl);
+ Input input(STREAM_ID);
+ input.run(STREAM_URL);
}
projects / cubemap / blobdiff