516 lines
22 KiB
C++
516 lines
22 KiB
C++
///\file conn_http_smooth.cpp
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///\brief Contains the main code for the HTTP Smooth Connector
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#include <iostream>
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#include <iomanip>
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#include <queue>
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#include <sstream>
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#include <cstdlib>
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#include <cstdio>
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#include <cmath>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <getopt.h>
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#include <mist/socket.h>
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#include <mist/http_parser.h>
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#include <mist/json.h>
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#include <mist/dtsc.h>
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#include <mist/base64.h>
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#include <mist/amf.h>
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#include <mist/mp4.h>
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#include <mist/mp4_ms.h>
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#include <mist/mp4_generic.h>
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#include <mist/config.h>
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#include <mist/stream.h>
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#include <mist/timing.h>
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long long unsigned int binToInt(std::string & binary){
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long long int result = 0;
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for ( int i = 0; i < 8; i++){
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result <<= 8;
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result += binary[i];
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}
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return result;
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}
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std::string intToBin(long long unsigned int number){
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std::string result;
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result.resize(8);
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for( int i = 7; i >= 0; i--){
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result[i] = number & 0xFF;
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number >>= 8;
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}
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return result;
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}
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std::string toUTF16(std::string original){
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std::string result;
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result += (char)0xFF;
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result += (char)0xFE;
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for (std::string::iterator it = original.begin(); it != original.end(); it++){
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result += (*it);
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result += (char)0x00;
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}
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return result;
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}
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///\brief Holds everything unique to HTTP Connectors.
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namespace Connector_HTTP {
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///\brief Builds an index file for HTTP Smooth streaming.
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///\param metadata The current metadata, used to generate the index.
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///\return The index file for HTTP Smooth Streaming.
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std::string smoothIndex(DTSC::Meta & metadata){
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std::stringstream Result;
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Result << "<?xml version=\"1.0\" encoding=\"utf-16\"?>\n";
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Result << "<SmoothStreamingMedia "
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"MajorVersion=\"2\" "
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"MinorVersion=\"0\" "
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"TimeScale=\"10000000\" ";
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std::deque<std::map<int,DTSC::Track>::iterator> audioIters;
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std::deque<std::map<int,DTSC::Track>::iterator> videoIters;
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long long int maxWidth = 0;
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long long int maxHeight = 0;
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long long int minWidth = 99999999;
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long long int minHeight = 99999999;
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for (std::map<int,DTSC::Track>::iterator it = metadata.tracks.begin(); it != metadata.tracks.end(); it++){
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if (it->second.codec == "AAC"){
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audioIters.push_back(it);
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}
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if (it->second.type == "video" && it->second.codec == "H264"){
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videoIters.push_back(it);
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if (it->second.width > maxWidth){maxWidth = it->second.width;}
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if (it->second.width < minWidth){minWidth = it->second.width;}
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if (it->second.height > maxHeight){maxHeight = it->second.height;}
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if (it->second.height < minHeight){minHeight = it->second.height;}
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}
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}
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if (metadata.vod){
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Result << "Duration=\"" << (*videoIters.begin())->second.lastms << "0000\"";
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}else{
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Result << "Duration=\"0\" "
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"IsLive=\"TRUE\" "
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"LookAheadFragmentCount=\"2\" "
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"DVRWindowLength=\"" << metadata.bufferWindow << "0000\" "
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"CanSeek=\"TRUE\" "
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"CanPause=\"TRUE\" ";
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}
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Result << ">\n";
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//Add audio entries
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if (audioIters.size()){
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Result << "<StreamIndex "
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"Type=\"audio\" "
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"QualityLevels=\"" << audioIters.size() << "\" "
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"Name=\"audio\" "
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"Chunks=\"" << (*audioIters.begin())->second.keys.size() << "\" "
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"Url=\"Q({bitrate},{CustomAttributes})/A({start time})\">\n";
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int index = 0;
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for (std::deque<std::map<int,DTSC::Track>::iterator>::iterator it = audioIters.begin(); it != audioIters.end(); it++){
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Result << "<QualityLevel "
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"Index=\"" << index << "\" "
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"Bitrate=\"" << (*it)->second.bps * 8 << "\" "
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"CodecPrivateData=\"" << std::hex;
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for (unsigned int i = 0; i < (*it)->second.init.size(); i++){
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Result << std::setfill('0') << std::setw(2) << std::right << (int)(*it)->second.init[i];
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}
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Result << std::dec << "\" "
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"SamplingRate=\"" << (*it)->second.rate << "\" "
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"Channels=\"2\" "
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"BitsPerSample=\"16\" "
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"PacketSize=\"4\" "
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"AudioTag=\"255\" "
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"FourCC=\"AACL\" >\n";
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Result << "<CustomAttributes>\n"
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"<Attribute Name = \"TrackID\" Value = \"" << (*it)->first << "\" />"
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"</CustomAttributes>";
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Result << "</QualityLevel>\n";
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index++;
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}
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if ((*audioIters.begin())->second.keys.size()){
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for (std::deque<DTSC::Key>::iterator it = (*audioIters.begin())->second.keys.begin(); it != (((*audioIters.begin())->second.keys.end()) - 1); it++){
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Result << "<c ";
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if (it == (*audioIters.begin())->second.keys.begin()){
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Result << "t=\"" << it->getTime() * 10000 << "\" ";
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}
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Result << "d=\"" << it->getLength() * 10000 << "\" />\n";
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}
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}
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Result << "</StreamIndex>\n";
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}
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//Add video entries
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if (videoIters.size()){
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Result << "<StreamIndex "
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"Type=\"video\" "
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"QualityLevels=\"" << videoIters.size() << "\" "
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"Name=\"video\" "
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"Chunks=\"" << (*videoIters.begin())->second.keys.size() << "\" "
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"Url=\"Q({bitrate},{CustomAttributes})/V({start time})\" "
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"MaxWidth=\"" << maxWidth << "\" "
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"MaxHeight=\"" << maxHeight << "\" "
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"DisplayWidth=\"" << maxWidth << "\" "
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"DisplayHeight=\"" << maxHeight << "\">\n";
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int index = 0;
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for (std::deque<std::map<int,DTSC::Track>::iterator>::iterator it = videoIters.begin(); it != videoIters.end(); it++){
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//Add video qualities
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Result << "<QualityLevel "
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"Index=\"" << index << "\" "
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"Bitrate=\"" << (*it)->second.bps * 8 << "\" "
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"CodecPrivateData=\"" << std::hex;
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MP4::AVCC avccbox;
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avccbox.setPayload((*it)->second.init);
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std::string tmpString = avccbox.asAnnexB();
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for (unsigned int i = 0; i < tmpString.size(); i++){
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Result << std::setfill('0') << std::setw(2) << std::right << (int)tmpString[i];
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}
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Result << std::dec << "\" "
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"MaxWidth=\"" << (*it)->second.width << "\" "
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"MaxHeight=\"" << (*it)->second.height << "\" "
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"FourCC=\"AVC1\" >\n";
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Result << "<CustomAttributes>\n"
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"<Attribute Name = \"TrackID\" Value = \"" << (*it)->first << "\" />"
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"</CustomAttributes>";
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Result << "</QualityLevel>\n";
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index++;
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}
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if ((*videoIters.begin())->second.keys.size()){
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for (std::deque<DTSC::Key>::iterator it = (*videoIters.begin())->second.keys.begin(); it != (((*videoIters.begin())->second.keys.end()) - 1); it++){
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Result << "<c ";
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if (it == (*videoIters.begin())->second.keys.begin()){
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Result << "t=\"" << it->getTime() * 10000 << "\" ";
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}
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Result << "d=\"" << it->getLength() * 10000 << "\" />\n";
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}
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}
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Result << "</StreamIndex>\n";
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}
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Result << "</SmoothStreamingMedia>\n";
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#if DEBUG >= 8
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std::cerr << "Sending this manifest:" << std::endl << Result << std::endl;
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#endif
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return toUTF16(Result.str());
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} //smoothIndex
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///\brief Main function for the HTTP Smooth Connector
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///\param conn A socket describing the connection the client.
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///\return The exit code of the connector.
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int smoothConnector(Socket::Connection & conn){
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std::deque<std::string> dataBuffer;//A buffer for the data that needs to be sent to the client.
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DTSC::Stream Strm;//Incoming stream buffer.
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HTTP::Parser HTTP_R;//HTTP Receiver
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HTTP::Parser HTTP_S;//HTTP Sender.
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bool ready4data = false;//Set to true when streaming is to begin.
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Socket::Connection ss( -1);//The Stream Socket, used to connect to the desired stream.
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std::string streamname;//Will contain the name of the stream.
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bool handlingRequest = false;
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std::string Quality;//Indicates the request quality of the movie.
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long long int requestedTime = -1;//Indicates the fragment requested.
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std::string parseString;//A string used for parsing different aspects of the request.
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unsigned int lastStats = 0;//Indicates the last time that we have sent stats to the server socket.
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conn.setBlocking(false);//Set the client socket to non-blocking
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while (conn.connected()){
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if ( !handlingRequest){
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if (conn.spool() && HTTP_R.Read(conn)){
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#if DEBUG >= 5
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std::cout << "Received request: " << HTTP_R.getUrl() << std::endl;
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#endif
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//Get data set by the proxy.
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conn.setHost(HTTP_R.GetHeader("X-Origin"));
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streamname = HTTP_R.GetHeader("X-Stream");
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if ( !ss){
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//initiate Stream Socket
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ss = Util::Stream::getStream(streamname);
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if ( !ss.connected()){
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#if DEBUG >= 1
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fprintf(stderr, "Could not connect to server!\n");
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#endif
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HTTP_S.Clean();
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HTTP_S.SetBody("No such stream is available on the system. Please try again.\n");
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conn.SendNow(HTTP_S.BuildResponse("404", "Not found"));
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ready4data = false;
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continue;
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}
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ss.setBlocking(false);
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Strm.waitForMeta(ss);
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}
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if (HTTP_R.url.find(".xap") != std::string::npos){
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#include "xap.h"
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HTTP_S.Clean();
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HTTP_S.SetHeader("Content-Type", "application/siverlight");
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HTTP_S.SetHeader("Cache-Control", "cache");
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HTTP_S.SetBody("");
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HTTP_S.SetHeader("Content-Length", xap_len);
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HTTP_S.SendResponse("200", "OK", conn);
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conn.SendNow((const char *)xap_data, xap_len);
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}else{
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if (HTTP_R.url.find("Manifest") == std::string::npos){
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//We have a non-manifest request, parse it.
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Quality = HTTP_R.url.substr(HTTP_R.url.find("TrackID=", 8) + 8);
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Quality = Quality.substr(0, Quality.find(")"));
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parseString = HTTP_R.url.substr(HTTP_R.url.find(")/") + 2);
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parseString = parseString.substr(parseString.find("(") + 1);
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requestedTime = atoll(parseString.substr(0, parseString.find(")")).c_str());
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long long int selectedQuality = atoll(Quality.c_str());
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DTSC::Track & myRef = Strm.metadata.tracks[selectedQuality];
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if (Strm.metadata.live){
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int seekable = Strm.canSeekms(requestedTime / 10000);
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if (seekable == 0){
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// iff the fragment in question is available, check if the next is available too
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for (std::deque<DTSC::Key>::iterator it = myRef.keys.begin(); it != myRef.keys.end(); it++){
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if (it->getTime() >= (requestedTime / 10000)){
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if ((it + 1) == myRef.keys.end()){
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seekable = 1;
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}
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break;
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}
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}
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}
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if (seekable < 0){
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HTTP_S.Clean();
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HTTP_S.SetBody("The requested fragment is no longer kept in memory on the server and cannot be served.\n");
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conn.SendNow(HTTP_S.BuildResponse("412", "Fragment out of range"));
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HTTP_R.Clean(); //clean for any possible next requests
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std::cout << "Fragment @ " << requestedTime / 10000 << "ms too old (" << myRef.keys.begin()->getTime() << " - " << myRef.keys.rbegin()->getTime() << " ms)" << std::endl;
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continue;
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}
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if (seekable > 0){
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HTTP_S.Clean();
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HTTP_S.SetBody("Proxy, re-request this in a second or two.\n");
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conn.SendNow(HTTP_S.BuildResponse("208", "Ask again later"));
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HTTP_R.Clean(); //clean for any possible next requests
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std::cout << "Fragment @ " << requestedTime / 10000 << "ms not available yet (" << myRef.keys.begin()->getTime() << " - " << myRef.keys.rbegin()->getTime() << " ms)" << std::endl;
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continue;
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}
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}
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//Seek to the right place and send a play-once for a single fragment.
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std::stringstream sstream;
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long long mstime = 0;
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int partOffset = 0;
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int keyDur = 0;
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DTSC::Key keyObj;
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for (std::deque<DTSC::Key>::iterator it = myRef.keys.begin(); it != myRef.keys.end(); it++){
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if (it->getTime() >= (requestedTime / 10000)){
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mstime = it->getTime();
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keyObj = (*it);
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std::deque<DTSC::Key>::iterator nextIt = it;
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nextIt++;
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if (nextIt != myRef.keys.end()){
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keyDur = nextIt->getTime() - it->getTime();
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}else{
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keyDur = -1;
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if (Strm.metadata.live){
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HTTP_S.Clean();
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HTTP_S.SetBody("Proxy, re-request this in a second or two.\n");
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conn.SendNow(HTTP_S.BuildResponse("208", "Ask again later"));
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HTTP_R.Clean(); //clean for any possible next requests
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std::cout << "Fragment after fragment @ " << (requestedTime / 10000) << " not available yet" << std::endl;
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}
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}
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break;
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}
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partOffset += it->getParts();
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}
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if (HTTP_R.url == "/"){continue;}//Don't continue, but continue instead.
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if (Strm.metadata.live){
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if (mstime == 0 && (requestedTime / 10000) > 1){
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HTTP_S.Clean();
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HTTP_S.SetBody("The requested fragment is no longer kept in memory on the server and cannot be served.\n");
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conn.SendNow(HTTP_S.BuildResponse("412", "Fragment out of range"));
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HTTP_R.Clean(); //clean for any possible next requests
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std::cout << "Fragment @ " << (requestedTime / 10000) << " too old" << std::endl;
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continue;
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}
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}
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sstream << "t " << myRef.trackID << "\n";
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sstream << "s " << keyObj.getTime() << "\n";
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if (keyDur != -1){
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sstream << "p " << keyObj.getTime() + keyDur << "\n";
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}else{
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sstream << "p\n";
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}
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ss.SendNow(sstream.str().c_str());
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//Wrap everything in mp4 boxes
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MP4::MFHD mfhd_box;
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mfhd_box.setSequenceNumber(((keyObj.getNumber() - 1) * 2) + myRef.trackID);
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MP4::TFHD tfhd_box;
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tfhd_box.setFlags(MP4::tfhdSampleFlag);
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tfhd_box.setTrackID(myRef.trackID);
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if (myRef.type == "video"){
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tfhd_box.setDefaultSampleFlags(0x00004001);
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}else{
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tfhd_box.setDefaultSampleFlags(0x00008002);
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}
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MP4::TRUN trun_box;
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trun_box.setDataOffset(42);
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unsigned int keySize = 0;
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if (myRef.type == "video"){
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trun_box.setFlags(MP4::trundataOffset | MP4::trunfirstSampleFlags | MP4::trunsampleDuration | MP4::trunsampleSize | MP4::trunsampleOffsets);
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}else{
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trun_box.setFlags(MP4::trundataOffset | MP4::trunsampleDuration | MP4::trunsampleSize);
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}
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trun_box.setFirstSampleFlags(0x00004002);
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for (int i = 0; i < keyObj.getParts(); i++){
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MP4::trunSampleInformation trunSample;
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trunSample.sampleSize = Strm.metadata.tracks[myRef.trackID].parts[i + partOffset].getSize();
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keySize += Strm.metadata.tracks[myRef.trackID].parts[i + partOffset].getSize();
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trunSample.sampleDuration = Strm.metadata.tracks[myRef.trackID].parts[i + partOffset].getDuration() * 10000;
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if (myRef.type == "video"){
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trunSample.sampleOffset = Strm.metadata.tracks[myRef.trackID].parts[i + partOffset].getOffset() * 10000;
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}
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trun_box.setSampleInformation(trunSample, i);
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}
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MP4::SDTP sdtp_box;
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sdtp_box.setVersion(0);
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if (myRef.type == "video"){
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sdtp_box.setValue(36, 4);
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for (int i = 1; i < keyObj.getParts(); i++){
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sdtp_box.setValue(20, 4 + i);
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}
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}else{
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sdtp_box.setValue(40, 4);
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for (int i = 1; i < keyObj.getParts(); i++){
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sdtp_box.setValue(40, 4 + i);
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}
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}
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MP4::TRAF traf_box;
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traf_box.setContent(tfhd_box, 0);
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traf_box.setContent(trun_box, 1);
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traf_box.setContent(sdtp_box, 2);
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//If the stream is live, we want to have a fragref box if possible
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if (Strm.metadata.live){
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MP4::UUID_TrackFragmentReference fragref_box;
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fragref_box.setVersion(1);
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fragref_box.setFragmentCount(0);
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int fragCount = 0;
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for (unsigned int i = 0; fragCount < 2 && i < myRef.keys.size() - 1; i++){
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if (myRef.keys[i].getTime() > (requestedTime / 10000)){
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fragref_box.setTime(fragCount, myRef.keys[i].getTime() * 10000);
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fragref_box.setDuration(fragCount, myRef.keys[i].getLength() * 10000);
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fragref_box.setFragmentCount(++fragCount);
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}
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}
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traf_box.setContent(fragref_box, 3);
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}
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MP4::MOOF moof_box;
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moof_box.setContent(mfhd_box, 0);
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//Setting the correct offsets.
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moof_box.setContent(traf_box, 1);
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trun_box.setDataOffset(moof_box.boxedSize() + 8);
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traf_box.setContent(trun_box, 1);
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moof_box.setContent(traf_box, 1);
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HTTP_S.Clean();
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HTTP_S.SetHeader("Content-Type", "video/mp4");
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HTTP_S.StartResponse(HTTP_R, conn);
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HTTP_S.Chunkify(moof_box.asBox(), moof_box.boxedSize(), conn);
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int size = htonl(keySize + 8);
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HTTP_S.Chunkify((char*)&size, 4, conn);
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HTTP_S.Chunkify("mdat", 4, conn);
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handlingRequest = true;
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}else{
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//We have a request for a Manifest, generate and send it.
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HTTP_S.Clean();
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HTTP_S.SetHeader("Content-Type", "text/xml");
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HTTP_S.SetHeader("Cache-Control", "no-cache");
|
|
std::string manifest = smoothIndex(Strm.metadata);
|
|
HTTP_S.SetBody(manifest);
|
|
HTTP_S.SendResponse("200", "OK", conn);
|
|
}
|
|
}
|
|
ready4data = true;
|
|
//Clean for any possible next requests
|
|
HTTP_R.Clean();
|
|
}else{
|
|
//Wait 250ms before checking for new data.
|
|
Util::sleep(250);
|
|
}
|
|
}else{
|
|
if (!ready4data){
|
|
//Wait 250ms before checking for new data.
|
|
Util::sleep(250);
|
|
}
|
|
}
|
|
if (ready4data){
|
|
unsigned int now = Util::epoch();
|
|
if (now != lastStats){
|
|
//Send new stats.
|
|
lastStats = now;
|
|
ss.SendNow(conn.getStats("HTTP_Smooth"));
|
|
}
|
|
if (ss.spool()){
|
|
while (Strm.parsePacket(ss.Received())){
|
|
if (Strm.lastType() == DTSC::AUDIO || Strm.lastType() == DTSC::VIDEO){
|
|
HTTP_S.Chunkify(Strm.lastData(), conn);
|
|
}
|
|
if (Strm.lastType() == DTSC::PAUSEMARK){
|
|
HTTP_S.Chunkify("", 0, conn);
|
|
handlingRequest = false;
|
|
}
|
|
}
|
|
}else{
|
|
Util::sleep(10);
|
|
}
|
|
if ( !ss.connected()){
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
conn.close();
|
|
ss.SendNow(conn.getStats("HTTP_Smooth").c_str());
|
|
ss.close();
|
|
return 0;
|
|
}//Smooth_Connector main function
|
|
|
|
}//Connector_HTTP namespace
|
|
|
|
///\brief The standard process-spawning main function.
|
|
int main(int argc, char ** argv){
|
|
Util::Config conf(argv[0], PACKAGE_VERSION);
|
|
JSON::Value capa;
|
|
capa["desc"] = "Enables HTTP protocol Microsoft-specific smooth streaming through silverlight (also known as HSS).";
|
|
capa["deps"] = "HTTP";
|
|
capa["url_rel"] = "/smooth/$.ism/Manifest";
|
|
capa["url_prefix"] = "/smooth/$.ism/";
|
|
capa["socket"] = "http_smooth";
|
|
capa["codecs"][0u][0u].append("H264");
|
|
capa["codecs"][0u][1u].append("AAC");
|
|
capa["methods"][0u]["handler"] = "http";
|
|
capa["methods"][0u]["type"] = "html5/application/vnd.ms-ss";
|
|
capa["methods"][0u]["priority"] = 9ll;
|
|
capa["methods"][0u]["nolive"] = 1;
|
|
capa["methods"][1u]["handler"] = "http";
|
|
capa["methods"][1u]["type"] = "silverlight";
|
|
capa["methods"][1u]["priority"] = 1ll;
|
|
capa["methods"][1u]["nolive"] = 1;
|
|
conf.addBasicConnectorOptions(capa);
|
|
conf.parseArgs(argc, argv);
|
|
|
|
if (conf.getBool("json")){
|
|
std::cout << capa.toString() << std::endl;
|
|
return -1;
|
|
}
|
|
|
|
return conf.serveForkedSocket(Connector_HTTP::smoothConnector);
|
|
} //main
|