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mistserver/src/conn_http_dynamic.cpp
Peter Wu b592d39bfd player: require "seek" before outputting
2012-08-30 16:59:49 +02:00

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/// \file conn_http_dynamic.cpp
/// Contains the main code for the HTTP Dynamic Connector
#include <iostream>
#include <queue>
#include <cstdlib>
#include <cstdio>
#include <cmath>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <getopt.h>
#include <ctime>
#include <mist/socket.h>
#include <mist/http_parser.h>
#include <mist/json.h>
#include <mist/dtsc.h>
#include <mist/flv_tag.h>
#include <mist/base64.h>
#include <mist/amf.h>
#include <mist/mp4.h>
#include <mist/config.h>
#include <sstream>
#include <mist/stream.h>
/// Holds everything unique to HTTP Dynamic Connector.
namespace Connector_HTTP{
std::string GenerateBootstrap(std::string & MovieId, JSON::Value & metadata){
MP4::AFRT afrt;
afrt.SetUpdate(false);
afrt.SetTimeScale(1000);
afrt.AddQualityEntry("");
if (!metadata.isMember("video") || !metadata["video"].isMember("keyms") || metadata["video"]["keyms"].asInt() == 0){
//metadata["lasttime"].asInt()?
afrt.AddFragmentRunEntry(1, 0, 2000); //FirstFragment, FirstFragmentTimestamp,Fragment Duration in milliseconds
}else{
afrt.AddFragmentRunEntry(1, 0, metadata["video"]["keyms"].asInt()); //FirstFragment, FirstFragmentTimestamp,Fragment Duration in milliseconds
}
afrt.WriteContent();
MP4::ASRT asrt;
asrt.SetUpdate(false);
asrt.AddQualityEntry("");
asrt.AddSegmentRunEntry(1, 199);//1 Segment, 199 Fragments
asrt.WriteContent();
MP4::ABST abst;
abst.AddFragmentRunTable(&afrt);
abst.AddSegmentRunTable(&asrt);
abst.SetBootstrapVersion(1);
abst.SetProfile(0);
if (metadata.isMember("length") && metadata["length"].asInt() > 0){
abst.SetLive(false);
abst.SetMediaTime(1000*metadata["length"].asInt());
}else{
abst.SetLive(true);
abst.SetMediaTime(0xFFFFFFFF);//metadata["lasttime"].asInt()?
}
abst.SetUpdate(false);
abst.SetTimeScale(1000);
abst.SetSMPTE(0);
abst.SetMovieIdentifier(MovieId);
abst.SetDRM("");
abst.SetMetaData("");
abst.AddServerEntry("");
abst.AddQualityEntry("");
abst.WriteContent();
std::string Result;
Result.append((char*)abst.GetBoxedData(), (int)abst.GetBoxedDataSize());
#if DEBUG >= 4
std::cout << "Sending bootstrap:" << std::endl << abst.toPrettyString(0) << std::endl;
#endif
return Base64::encode(Result);
}
/// Returns a F4M-format manifest file
std::string BuildManifest(std::string & MovieId, JSON::Value & metadata){
std::string Result;
if (metadata.isMember("length") && metadata["length"].asInt() > 0){
std::stringstream st;
st << ((double)metadata["video"]["keyms"].asInt() / 1000);
Result="<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
"<manifest xmlns=\"http://ns.adobe.com/f4m/1.0\">\n"
"<id>" + MovieId + "</id>\n"
"<duration>" + metadata["length"].asString() + "</duration>\n"
"<mimeType>video/mp4</mimeType>\n"
"<streamType>recorded</streamType>\n"
"<deliveryType>streaming</deliveryType>\n"
"<bestEffortFetchInfo segmentDuration=\""+metadata["length"].asString()+".000\" fragmentDuration=\""+st.str()+"\" />\n"
"<bootstrapInfo profile=\"named\" id=\"bootstrap1\">" + GenerateBootstrap(MovieId, metadata) + "</bootstrapInfo>\n"
"<media streamId=\"1\" bootstrapInfoId=\"bootstrap1\" url=\"" + MovieId + "/\"></media>\n"
"</manifest>\n";
}else{
Result="<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
"<manifest xmlns=\"http://ns.adobe.com/f4m/1.0\">\n"
"<id>" + MovieId + "</id>\n"
"<mimeType>video/mp4</mimeType>\n"
"<streamType>live</streamType>\n"
"<deliveryType>streaming</deliveryType>\n"
"<bootstrapInfo profile=\"named\" id=\"bootstrap1\">" + GenerateBootstrap(MovieId, metadata) + "</bootstrapInfo>\n"
"<media streamId=\"1\" bootstrapInfoId=\"bootstrap1\" url=\"" + MovieId + "/\"></media>\n"
"</manifest>\n";
}
#if DEBUG >= 4
std::cerr << "Sending this manifest:" << std::endl << Result << std::endl;
#endif
return Result;
}//BuildManifest
/// Main function for Connector_HTTP_Dynamic
int Connector_HTTP_Dynamic(Socket::Connection conn){
std::string FlashBuf;
FLV::Tag tmp;//temporary tag, for init data
std::queue<std::string> Flash_FragBuffer;//Fragment buffer
DTSC::Stream Strm;//Incoming stream buffer.
HTTP::Parser HTTP_R, HTTP_S;//HTTP Receiver en HTTP Sender.
bool ready4data = false;//Set to true when streaming is to begin.
bool pending_manifest = false;
bool inited = false;
Socket::Connection ss(-1);
std::string streamname;
FLV::Tag tag;///< Temporary tag buffer.
std::string recBuffer = "";
std::string Quality;
int Segment = -1;
int ReqFragment = -1;
int temp;
int Flash_RequestPending = 0;
unsigned int lastStats = 0;
conn.setBlocking(false);//do not block on conn.spool() when no data is available
while (conn.connected()){
if (conn.spool()){
if (HTTP_R.Read(conn.Received())){
#if DEBUG >= 4
std::cout << "Received request: " << HTTP_R.url << std::endl;
#endif
conn.setHost(HTTP_R.GetHeader("X-Origin"));
if (HTTP_R.url.find("f4m") == std::string::npos){
streamname = HTTP_R.url.substr(1,HTTP_R.url.find("/",1)-1);
Quality = HTTP_R.url.substr( HTTP_R.url.find("/",1)+1 );
Quality = Quality.substr(0, Quality.find("Seg"));
temp = HTTP_R.url.find("Seg") + 3;
Segment = atoi( HTTP_R.url.substr(temp,HTTP_R.url.find("-",temp)-temp).c_str());
temp = HTTP_R.url.find("Frag") + 4;
ReqFragment = atoi( HTTP_R.url.substr(temp).c_str() );
#if DEBUG >= 4
printf( "Quality: %s, Seg %d Frag %d\n", Quality.c_str(), Segment, ReqFragment);
#endif
Flash_RequestPending++;
}else{
streamname = HTTP_R.url.substr(1,HTTP_R.url.find("/",1)-1);
pending_manifest = true;
}
ready4data = true;
HTTP_R.Clean(); //clean for any possible next requests
}else{
#if DEBUG >= 3
fprintf(stderr, "Could not parse the following:\n%s\n", conn.Received().c_str());
#endif
}
}
if (ready4data){
if (!inited){
//we are ready, connect the socket!
ss = Util::Stream::getStream(streamname);
if (!ss.connected()){
#if DEBUG >= 1
fprintf(stderr, "Could not connect to server!\n");
#endif
ss.close();
HTTP_S.Clean();
HTTP_S.SetBody("No such stream is available on the system. Please try again.\n");
conn.Send(HTTP_S.BuildResponse("404", "Not found"));
ready4data = false;
continue;
}
#if DEBUG >= 3
fprintf(stderr, "Everything connected, starting to send video data...\n");
#endif
ss.Send("play\n");ss.flush();
inited = true;
}
if ((Flash_RequestPending > 0) && !Flash_FragBuffer.empty()){
HTTP_S.Clean();
HTTP_S.SetHeader("Content-Type","video/mp4");
HTTP_S.SetBody(MP4::mdatFold(Flash_FragBuffer.front()));
Flash_FragBuffer.pop();
conn.Send(HTTP_S.BuildResponse("200", "OK"));
Flash_RequestPending--;
#if DEBUG >= 3
fprintf(stderr, "Sending a video fragment. %i left in buffer, %i requested\n", (int)Flash_FragBuffer.size(), Flash_RequestPending);
#endif
}
unsigned int now = time(0);
if (now != lastStats){
lastStats = now;
ss.Send("S "+conn.getStats("HTTP_Dynamic"));
}
if (ss.spool() || ss.Received() != ""){
if (Strm.parsePacket(ss.Received())){
if (Strm.getPacket(0).isMember("time")){
if (!Strm.metadata.isMember("firsttime")){
Strm.metadata["firsttime"] = Strm.getPacket(0)["time"];
}else{
if (!Strm.metadata.isMember("length") || Strm.metadata["length"].asInt() == 0){
Strm.getPacket(0)["time"] = Strm.getPacket(0)["time"].asInt() - Strm.metadata["firsttime"].asInt();
}
}
Strm.metadata["lasttime"] = Strm.getPacket(0)["time"];
}
tag.DTSCLoader(Strm);
if (pending_manifest){
HTTP_S.Clean();
HTTP_S.SetHeader("Content-Type","text/xml");
HTTP_S.SetHeader("Cache-Control","no-cache");
std::string manifest = BuildManifest(streamname, Strm.metadata);
HTTP_S.SetBody(manifest);
conn.Send(HTTP_S.BuildResponse("200", "OK"));
#if DEBUG >= 3
printf("Sent manifest\n");
#endif
pending_manifest = false;
}
if (Strm.getPacket(0).isMember("keyframe")){
if (FlashBuf != ""){
Flash_FragBuffer.push(FlashBuf);
while (Flash_FragBuffer.size() > 2){
Flash_FragBuffer.pop();
}
#if DEBUG >= 4
fprintf(stderr, "Received a fragment. Now %i in buffer.\n", (int)Flash_FragBuffer.size());
#endif
}
FlashBuf.clear();
//fill buffer with init data, if needed.
if (Strm.metadata.isMember("audio") && Strm.metadata["audio"].isMember("init")){
tmp.DTSCAudioInit(Strm);
FlashBuf.append(tmp.data, tmp.len);
}
if (Strm.metadata.isMember("video") && Strm.metadata["video"].isMember("init")){
tmp.DTSCVideoInit(Strm);
FlashBuf.append(tmp.data, tmp.len);
}
}
FlashBuf.append(tag.data, tag.len);
}
}
if (!ss.connected()){break;}
}
}
conn.close();
ss.Send("S "+conn.getStats("HTTP_Dynamic"));
ss.flush();
ss.close();
#if DEBUG >= 1
if (FLV::Parse_Error){fprintf(stderr, "FLV Parser Error: %s\n", FLV::Error_Str.c_str());}
fprintf(stderr, "User %i disconnected.\n", conn.getSocket());
if (inited){
fprintf(stderr, "Status was: inited\n");
}else{
if (ready4data){
fprintf(stderr, "Status was: ready4data\n");
}else{
fprintf(stderr, "Status was: connected\n");
}
}
#endif
return 0;
}//Connector_HTTP_Dynamic main function
};//Connector_HTTP_Dynamic namespace
int main(int argc, char ** argv){
Util::Config conf(argv[0], PACKAGE_VERSION);
conf.addConnectorOptions(1935);
conf.parseArgs(argc, argv);
Socket::Server server_socket = Socket::Server("/tmp/mist/http_dynamic");
if (!server_socket.connected()){return 1;}
conf.activate();
while (server_socket.connected() && conf.is_active){
Socket::Connection S = server_socket.accept();
if (S.connected()){//check if the new connection is valid
pid_t myid = fork();
if (myid == 0){//if new child, start MAINHANDLER
return Connector_HTTP::Connector_HTTP_Dynamic(S);
}else{//otherwise, do nothing or output debugging text
#if DEBUG >= 3
fprintf(stderr, "Spawned new process %i for socket %i\n", (int)myid, S.getSocket());
#endif
}
}
}//while connected
server_socket.close();
return 0;
}//main
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