Support audio-only FFmpeg inputs. Somewhat wonky, though.

[nageru] / httpd.cpp

diff --git a/httpd.cpp b/httpd.cpp
index 2b19779ea450f253a2dee0e689b121eda4733335..f6441768bbdde1df3d31e2b42a2cb13430019376 100644 (file)
--- a/httpd.cpp
+++ b/httpd.cpp
@@ -10,6 +10,9 @@
 #include <sys/time.h>
 #include <time.h>
 #include <memory>
+extern "C" {
+#include <libavutil/avutil.h>
+}
 
 #include "defs.h"
 #include "metacube2.h"
@@ -22,18 +25,12 @@ using namespace std;
 
 HTTPD::HTTPD()
 {
-       global_metrics.register_int_metric("num_connected_clients", &metric_num_connected_clients);
+       global_metrics.add("num_connected_clients", &metric_num_connected_clients, Metrics::TYPE_GAUGE);
 }
 
 HTTPD::~HTTPD()
 {
-       if (mhd) {
-               MHD_quiesce_daemon(mhd);
-               for (Stream *stream : streams) {
-                       stream->stop();
-               }
-               MHD_stop_daemon(mhd);
-       }
+       stop();
 }
 
 void HTTPD::start(int port)
@@ -49,11 +46,23 @@ void HTTPD::start(int port)
        }
 }
 
-void HTTPD::add_data(const char *buf, size_t size, bool keyframe)
+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, 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);
        }
 }
 
@@ -88,9 +97,32 @@ int HTTPD::answer_to_connection(MHD_Connection *connection,
                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);
+       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);
@@ -164,7 +196,7 @@ ssize_t HTTPD::Stream::reader_callback(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;
@@ -179,15 +211,34 @@ void HTTPD::Stream::add_data(const char *buf, size_t buf_size, HTTPD::Stream::Da
        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));