-#include <arpa/inet.h>
+#include "httpd.h"
+
#include <assert.h>
+#include <byteswap.h>
+#include <endian.h>
#include <microhttpd.h>
+#include <netinet/in.h>
#include <stdio.h>
-#include <stdlib.h>
#include <string.h>
-
-#include <vector>
-
-#include "httpd.h"
+#include <sys/time.h>
+#include <time.h>
+#include <memory>
+extern "C" {
+#include <libavutil/avutil.h>
+}
#include "defs.h"
-#include "flags.h"
#include "metacube2.h"
-#include "timebase.h"
+#include "metrics.h"
struct MHD_Connection;
struct MHD_Response;
HTTPD::HTTPD()
{
+ global_metrics.add("num_connected_clients", &metric_num_connected_clients, Metrics::TYPE_GAUGE);
}
HTTPD::~HTTPD()
{
- MHD_quiesce_daemon(mhd);
- for (Stream *stream : streams) {
- stream->stop();
- }
- MHD_stop_daemon(mhd);
+ stop();
}
void HTTPD::start(int port)
port,
nullptr, nullptr,
&answer_to_connection_thunk, this,
- MHD_OPTION_NOTIFY_COMPLETED, &request_completed_thunk, this,
+ MHD_OPTION_NOTIFY_COMPLETED, nullptr, this,
MHD_OPTION_END);
+ if (mhd == nullptr) {
+ fprintf(stderr, "Warning: Could not open HTTP server. (Port already in use?)\n");
+ }
+}
+
+void HTTPD::stop()
+{
+ if (mhd) {
+ MHD_quiesce_daemon(mhd);
+ for (Stream *stream : streams) {
+ stream->stop();
+ }
+ MHD_stop_daemon(mhd);
+ mhd = nullptr;
+ }
}
-void HTTPD::add_data(const char *buf, size_t size, bool keyframe)
+void HTTPD::add_data(const char *buf, size_t size, bool keyframe, int64_t time, AVRational timebase)
{
unique_lock<mutex> lock(streams_mutex);
for (Stream *stream : streams) {
- stream->add_data(buf, size, keyframe ? Stream::DATA_TYPE_KEYFRAME : Stream::DATA_TYPE_OTHER);
+ stream->add_data(buf, size, keyframe ? Stream::DATA_TYPE_KEYFRAME : Stream::DATA_TYPE_OTHER, time, timebase);
}
}
framing = HTTPD::Stream::FRAMING_RAW;
}
- HTTPD::Stream *stream = new HTTPD::Stream(framing);
- stream->add_data(header.data(), header.size(), Stream::DATA_TYPE_HEADER);
+ if (strcmp(url, "/metrics") == 0) {
+ string contents = global_metrics.serialize();
+ MHD_Response *response = MHD_create_response_from_buffer(
+ contents.size(), &contents[0], MHD_RESPMEM_MUST_COPY);
+ MHD_add_response_header(response, "Content-type", "text/plain");
+ int ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
+ MHD_destroy_response(response); // Only decreases the refcount; actual free is after the request is done.
+ return ret;
+ }
+ if (endpoints.count(url)) {
+ pair<string, string> contents_and_type = endpoints[url].callback();
+ MHD_Response *response = MHD_create_response_from_buffer(
+ contents_and_type.first.size(), &contents_and_type.first[0], MHD_RESPMEM_MUST_COPY);
+ MHD_add_response_header(response, "Content-type", contents_and_type.second.c_str());
+ if (endpoints[url].cors_policy == ALLOW_ALL_ORIGINS) {
+ MHD_add_response_header(response, "Access-Control-Allow-Origin", "*");
+ }
+ int ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
+ MHD_destroy_response(response); // Only decreases the refcount; actual free is after the request is done.
+ return ret;
+ }
+
+ // Small hack; reject unknown /channels/foo.
+ if (string(url).find("/channels/") == 0) {
+ string contents = "Not found.";
+ MHD_Response *response = MHD_create_response_from_buffer(
+ contents.size(), &contents[0], MHD_RESPMEM_MUST_COPY);
+ MHD_add_response_header(response, "Content-type", "text/plain");
+ int ret = MHD_queue_response(connection, MHD_HTTP_NOT_FOUND, response);
+ MHD_destroy_response(response); // Only decreases the refcount; actual free is after the request is done.
+ return ret;
+ }
+
+ HTTPD::Stream *stream = new HTTPD::Stream(this, framing);
+ stream->add_data(header.data(), header.size(), Stream::DATA_TYPE_HEADER, AV_NOPTS_VALUE, AVRational{ 1, 0 });
{
unique_lock<mutex> lock(streams_mutex);
streams.insert(stream);
}
+ ++metric_num_connected_clients;
*con_cls = stream;
// Does not strictly have to be equal to MUX_BUFFER_SIZE.
MHD_Response *response = MHD_create_response_from_callback(
(size_t)-1, MUX_BUFFER_SIZE, &HTTPD::Stream::reader_callback_thunk, stream, &HTTPD::free_stream);
-
// TODO: Content-type?
if (framing == HTTPD::Stream::FRAMING_METACUBE) {
MHD_add_response_header(response, "Content-encoding", "metacube");
}
+
int ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
- //MHD_destroy_response(response);
+ MHD_destroy_response(response); // Only decreases the refcount; actual free is after the request is done.
return ret;
}
void HTTPD::free_stream(void *cls)
{
- // FIXME: When is this actually called, if ever?
- // Also, shouldn't we remove it from streams?
HTTPD::Stream *stream = (HTTPD::Stream *)cls;
- delete stream;
-}
-
-void HTTPD::request_completed_thunk(void *cls, struct MHD_Connection *connection, void **con_cls, enum MHD_RequestTerminationCode toe)
-{
- HTTPD *httpd = (HTTPD *)cls;
- return httpd->request_completed(connection, con_cls, toe);
-}
-
-void HTTPD::request_completed(struct MHD_Connection *connection, void **con_cls, enum MHD_RequestTerminationCode toe)
-{
- if (con_cls == nullptr) {
- // Request was never set up.
- return;
- }
- HTTPD::Stream *stream = (HTTPD::Stream *)*con_cls;
+ HTTPD *httpd = stream->get_parent();
{
- unique_lock<mutex> lock(streams_mutex);
+ unique_lock<mutex> lock(httpd->streams_mutex);
delete stream;
- streams.erase(stream);
+ httpd->streams.erase(stream);
}
+ --httpd->metric_num_connected_clients;
}
ssize_t HTTPD::Stream::reader_callback_thunk(void *cls, uint64_t pos, char *buf, size_t max)
return ret;
}
-void HTTPD::Stream::add_data(const char *buf, size_t buf_size, HTTPD::Stream::DataType data_type)
+void HTTPD::Stream::add_data(const char *buf, size_t buf_size, HTTPD::Stream::DataType data_type, int64_t time, AVRational timebase)
{
if (buf_size == 0) {
return;
unique_lock<mutex> lock(buffer_mutex);
if (framing == FRAMING_METACUBE) {
- metacube2_block_header hdr;
- memcpy(hdr.sync, METACUBE2_SYNC, sizeof(hdr.sync));
- hdr.size = htonl(buf_size);
int flags = 0;
if (data_type == DATA_TYPE_HEADER) {
flags |= METACUBE_FLAGS_HEADER;
} else if (data_type == DATA_TYPE_OTHER) {
flags |= METACUBE_FLAGS_NOT_SUITABLE_FOR_STREAM_START;
}
+
+ // If we're about to send a keyframe, send a pts metadata block
+ // to mark its time.
+ if ((flags & METACUBE_FLAGS_NOT_SUITABLE_FOR_STREAM_START) == 0 && time != AV_NOPTS_VALUE) {
+ metacube2_pts_packet packet;
+ packet.type = htobe64(METACUBE_METADATA_TYPE_NEXT_BLOCK_PTS);
+ packet.pts = htobe64(time);
+ packet.timebase_num = htobe64(timebase.num);
+ packet.timebase_den = htobe64(timebase.den);
+
+ metacube2_block_header hdr;
+ memcpy(hdr.sync, METACUBE2_SYNC, sizeof(hdr.sync));
+ hdr.size = htonl(sizeof(packet));
+ hdr.flags = htons(METACUBE_FLAGS_METADATA);
+ hdr.csum = htons(metacube2_compute_crc(&hdr));
+ buffered_data.emplace_back((char *)&hdr, sizeof(hdr));
+ buffered_data.emplace_back((char *)&packet, sizeof(packet));
+ }
+
+ metacube2_block_header hdr;
+ memcpy(hdr.sync, METACUBE2_SYNC, sizeof(hdr.sync));
+ hdr.size = htonl(buf_size);
hdr.flags = htons(flags);
hdr.csum = htons(metacube2_compute_crc(&hdr));
buffered_data.emplace_back((char *)&hdr, sizeof(hdr));
}
buffered_data.emplace_back(buf, buf_size);
+
+ // Send a Metacube2 timestamp every keyframe.
+ if (framing == FRAMING_METACUBE && data_type == DATA_TYPE_KEYFRAME) {
+ timespec now;
+ clock_gettime(CLOCK_REALTIME, &now);
+
+ metacube2_timestamp_packet packet;
+ packet.type = htobe64(METACUBE_METADATA_TYPE_ENCODER_TIMESTAMP);
+ packet.tv_sec = htobe64(now.tv_sec);
+ packet.tv_nsec = htobe64(now.tv_nsec);
+
+ metacube2_block_header hdr;
+ memcpy(hdr.sync, METACUBE2_SYNC, sizeof(hdr.sync));
+ hdr.size = htonl(sizeof(packet));
+ hdr.flags = htons(METACUBE_FLAGS_METADATA);
+ hdr.csum = htons(metacube2_compute_crc(&hdr));
+ buffered_data.emplace_back((char *)&hdr, sizeof(hdr));
+ buffered_data.emplace_back((char *)&packet, sizeof(packet));
+ }
+
has_buffered_data.notify_all();
}
projects / nageru / blobdiff