source/client.cpp

   1 #include <msp/fs/dir.h>
   2 #include <msp/fs/stat.h>
   3 #include <msp/strings/format.h>
   4 #include "client.h"
   5 #include "xinema.h"
   6
   7 using namespace std;
   8 using namespace Msp;
   9
  10 Client::Client(Xinema &x, Net::StreamSocket *s):
  11         xinema(x),
  12         socket(s),
  13         stale(false)
  14 {
  15         socket->signal_data_available.connect(sigc::mem_fun(this, &Client::data_available));
  16         socket->signal_end_of_file.connect(sigc::mem_fun(this, &Client::end_of_stream));
  17
  18         xinema.signal_stream_created.connect(sigc::mem_fun(this, &Client::stream_created));
  19         xinema.signal_stream_destroyed.connect(sigc::mem_fun(this, &Client::stream_destroyed));
  20         XineStream *stream = xinema.get_stream();
  21         if(stream)
  22                 stream_created(*stream);
  23 }
  24
  25 void Client::data_available()
  26 {
  27         char rbuf[1024];
  28         unsigned len;
  29         try
  30         {
  31                 len = socket->read(rbuf, sizeof(rbuf));
  32         }
  33         catch(const std::exception &)
  34         {
  35                 stale = true;
  36                 return;
  37         }
  38
  39         buffer.append(rbuf, len);
  40
  41         string::size_type start = 0;
  42         while(1)
  43         {
  44                 string::size_type newline = buffer.find('\n', start);
  45                 if(newline==string::npos)
  46                         break;
  47
  48                 try
  49                 {
  50                         process_command(buffer.substr(start, newline-start));
  51                 }
  52                 catch(const exception &e)
  53                 {
  54                         send_reply(string("error ")+e.what());
  55                 }
  56
  57                 start = newline+1;
  58         }
  59
  60         buffer.erase(0, start);
  61 }
  62
  63 void Client::end_of_stream()
  64 {
  65         stale = true;
  66 }
  67
  68 XineStream &Client::get_stream() const
  69 {
  70         XineStream *stream = xinema.get_stream();
  71         if(stream)
  72                 return *stream;
  73
  74         throw runtime_error("No stream");
  75 }
  76
  77 void Client::process_command(const string &cmd)
  78 {
  79         string::size_type space = cmd.find(' ');
  80         string keyword = cmd.substr(0, space);
  81         string args;
  82         if(space!=string::npos)
  83                 args = cmd.substr(space+1);
  84
  85         if(keyword=="list_directory")
  86                 list_directory(args);
  87         else if(keyword=="play_file")
  88                 xinema.play_file(args);
  89         else if(keyword=="play")
  90                 get_stream().play();
  91         else if(keyword=="seek")
  92                 get_stream().seek(lexical_cast<float>(args)*Time::sec);
  93         else if(keyword=="pause")
  94                 get_stream().pause();
  95         else if(keyword=="stop")
  96                 get_stream().stop();
  97         else
  98                 throw runtime_error("Invalid command");
  99 }
 100
 101 void Client::send_reply(const string &reply)
 102 {
 103         Msp::MutexLock lock(mutex);
 104         try
 105         {
 106                 socket->write(reply);
 107                 socket->put('\n');
 108         }
 109         catch(const std::exception &)
 110         {
 111                 stale = true;
 112         }
 113 }
 114
 115 void Client::list_directory(const FS::Path &dn)
 116 {
 117         list<string> files = FS::list_files(dn);
 118
 119         send_reply("directory "+dn.str());
 120         for(list<string>::const_iterator i=files.begin(); i!=files.end(); ++i)
 121         {
 122                 if(FS::is_dir(dn / *i))
 123                         send_reply("subdir "+*i);
 124                 else
 125                         send_reply("file "+*i);
 126         }
 127 }
 128
 129 void Client::stream_created(XineStream &stream)
 130 {
 131         stream.signal_state_changed.connect(sigc::mem_fun(this, &Client::stream_state_changed));
 132         stream.signal_title_changed.connect(sigc::mem_fun(this, &Client::stream_title_changed));
 133         stream.signal_duration_changed.connect(sigc::mem_fun(this, &Client::stream_duration_changed));
 134         stream.signal_position_changed.connect(sigc::mem_fun(this, &Client::stream_position_changed));
 135
 136         MutexLock lock(stream.get_mutex());
 137         stream_state_changed(stream.get_state());
 138
 139         string title = stream.get_title();
 140         if(!title.empty())
 141                 send_reply("title "+title);
 142
 143         if(const Time::TimeDelta &dur = stream.get_duration())
 144                 stream_duration_changed(dur);
 145 }
 146
 147 void Client::stream_destroyed()
 148 {
 149         send_reply("ejected");
 150 }
 151
 152 void Client::stream_state_changed(XineStream::State state)
 153 {
 154         send_reply(format("state %s", state));
 155 }
 156
 157 void Client::stream_title_changed(const string &title)
 158 {
 159         send_reply("title "+title);
 160 }
 161
 162 void Client::stream_duration_changed(const Time::TimeDelta &dur)
 163 {
 164         send_reply(format("duration %.3f", dur/Time::sec));
 165 }
 166
 167 void Client::stream_position_changed(const Time::TimeDelta &pos)
 168 {
 169         if(abs(pos-last_position)>=Time::sec)
 170         {
 171                 send_reply(format("position %.3f", pos/Time::sec));
 172                 last_position = pos;
 173         }
 174 }