source/xinestream.cpp

   1 #include <msp/strings/format.h>
   2 #include "xineengine.h"
   3 #include "xinestream.h"
   4
   5 using namespace std;
   6 using namespace Msp;
   7
   8 XineStream::XineStream(XineEngine &e, const string &mrl):
   9         engine(e),
  10         filename(mrl.substr(mrl.rfind('/')+1)),
  11         state(STOPPED),
  12         title(filename),
  13         current_audio(0),
  14         current_spu(OFF),
  15         channels_changed(false)
  16 {
  17         stream = xine_stream_new(engine.get_engine(), engine.get_audio_driver(), engine.get_video_driver());
  18         queue = xine_event_new_queue(stream);
  19         xine_open(stream, mrl.c_str());
  20
  21         update_channels();
  22         update_info();
  23
  24         engine.add_stream(*this);
  25 }
  26
  27 const string &XineStream::get_title() const
  28 {
  29         return title.empty() ? filename : title;
  30 }
  31
  32 XineStream::~XineStream()
  33 {
  34         engine.remove_stream(*this);
  35
  36         xine_close(stream);
  37         xine_event_dispose_queue(queue);
  38         xine_dispose(stream);
  39 }
  40
  41 void XineStream::play()
  42 {
  43         if(state==STOPPED)
  44                 xine_play(stream, 0, 0);
  45         else if(state==PAUSED)
  46                 xine_set_param(stream, XINE_PARAM_SPEED, XINE_SPEED_NORMAL);
  47
  48         set_state(PLAYING);
  49 }
  50
  51 void XineStream::seek(const Time::TimeDelta &time)
  52 {
  53         xine_play(stream, 0, time/Time::msec);
  54         if(state!=PLAYING)
  55         {
  56                 xine_set_param(stream, XINE_PARAM_SPEED, XINE_SPEED_PAUSE);
  57                 set_state(PAUSED);
  58         }
  59 }
  60
  61 void XineStream::pause()
  62 {
  63         if(state==PLAYING)
  64         {
  65                 xine_set_param(stream, XINE_PARAM_SPEED, XINE_SPEED_PAUSE);
  66                 set_state(PAUSED);
  67         }
  68 }
  69
  70 void XineStream::stop()
  71 {
  72         xine_stop(stream);
  73         set_state(STOPPED);
  74 }
  75
  76 void XineStream::set_state(State s)
  77 {
  78         if(s==state)
  79                 return;
  80
  81         MutexLock lock(mutex);
  82         state = s;
  83         signal_state_changed.emit(state);
  84 }
  85
  86 void XineStream::select_audio_channel(int i)
  87 {
  88         if(i>=0 && static_cast<unsigned>(i)>=audio_channels.size())
  89                 throw out_of_range("XineStream::set_audio_channel");
  90
  91         if(i<0)
  92                 i = OFF;
  93         xine_set_param(stream, XINE_PARAM_AUDIO_CHANNEL_LOGICAL, (i==OFF ? -2 : i));
  94 }
  95
  96 void XineStream::select_spu_channel(int i)
  97 {
  98         if(i>=0 && static_cast<unsigned>(i)>=spu_channels.size())
  99                 throw out_of_range("XineStream::set_spu_channel");
 100
 101         if(i<0)
 102                 i = OFF;
 103         xine_set_param(stream, XINE_PARAM_SPU_CHANNEL, (i==OFF ? -2 : i));
 104 }
 105
 106 void XineStream::tick()
 107 {
 108         while(xine_event_t *event = xine_event_get(queue))
 109         {
 110                 handle_event(*event);
 111                 xine_event_free(event);
 112         }
 113
 114         if(channels_changed)
 115         {
 116                 channels_changed = false;
 117                 update_channels();
 118         }
 119
 120         update_info();
 121 }
 122
 123 void XineStream::update_info()
 124 {
 125         const char *xt = xine_get_meta_info(stream, XINE_META_INFO_TITLE);
 126         if((xt && title.compare(xt)) || (!xt && !title.empty()))
 127         {
 128                 MutexLock lock(mutex);
 129                 title = (xt ? xt : string());
 130                 signal_title_changed.emit(get_title());
 131         }
 132
 133         int dur_msec, pos_msec;
 134         xine_get_pos_length(stream, 0, &pos_msec, &dur_msec);
 135         Time::TimeDelta dur = dur_msec*Time::msec;
 136         Time::TimeDelta pos = pos_msec*Time::msec;
 137         if(dur!=duration)
 138         {
 139                 MutexLock lock(mutex);
 140                 duration = dur;
 141                 signal_duration_changed.emit(duration);
 142         }
 143         if(pos!=position)
 144         {
 145                 MutexLock lock(mutex);
 146                 position = pos;
 147                 signal_position_changed.emit(position);
 148         }
 149
 150         int audio = xine_get_param(stream, XINE_PARAM_AUDIO_CHANNEL_LOGICAL);
 151         if(audio==-1 && !audio_channels.empty())
 152                 audio = 0;
 153         else if(audio<0)
 154                 audio = OFF;
 155         if(audio!=current_audio)
 156         {
 157                 MutexLock lock(mutex);
 158                 current_audio = audio;
 159                 signal_current_audio_channel_changed.emit(current_audio);
 160         }
 161
 162         int spu = xine_get_param(stream, XINE_PARAM_SPU_CHANNEL);
 163         if(spu<0)
 164                 spu = OFF;
 165         if(spu!=current_spu)
 166         {
 167                 MutexLock lock(mutex);
 168                 current_spu = spu;
 169                 signal_current_spu_channel_changed.emit(current_spu);
 170         }
 171 }
 172
 173 void XineStream::update_channels()
 174 {
 175         MutexLock lock(mutex);
 176         char langbuf[XINE_LANG_MAX];
 177
 178         unsigned n_audio = xine_get_stream_info(stream, XINE_STREAM_INFO_MAX_AUDIO_CHANNEL);
 179         audio_channels.resize(n_audio);
 180         for(unsigned i=0; i<n_audio; ++i)
 181         {
 182                 if(xine_get_audio_lang(stream, i, langbuf))
 183                         audio_channels[i].assign(langbuf);
 184                 else
 185                         audio_channels[i].assign("unknown");
 186         }
 187
 188         unsigned n_spu = xine_get_stream_info(stream, XINE_STREAM_INFO_MAX_SPU_CHANNEL);
 189         spu_channels.resize(n_spu);
 190         for(unsigned i=0; i<n_spu; ++i)
 191         {
 192                 if(xine_get_spu_lang(stream, i, langbuf))
 193                         spu_channels[i].assign(langbuf);
 194                 else
 195                         spu_channels[i].assign("unknown");
 196         }
 197
 198         signal_channels_changed.emit();
 199 }
 200
 201 void XineStream::handle_event(const xine_event_t &event)
 202 {
 203         switch(event.type)
 204         {
 205         case XINE_EVENT_UI_PLAYBACK_FINISHED:
 206                 set_state(STOPPED);
 207                 signal_finished.emit();
 208                 break;
 209         case XINE_EVENT_UI_CHANNELS_CHANGED:
 210                 channels_changed = true;
 211                 break;
 212         }
 213 }
 214
 215
 216 void operator<<(LexicalConverter &conv, XineStream::State state)
 217 {
 218         switch(state)
 219         {
 220         case XineStream::STOPPED: conv.result("STOPPED"); return;
 221         case XineStream::PAUSED: conv.result("PAUSED"); return;
 222         case XineStream::PLAYING: conv.result("PLAYING"); return;
 223         default: conv.result(format("State(%d)", static_cast<int>(state))); return;
 224         }
 225 }
 226
 227 void operator>>(const LexicalConverter &conv, XineStream::State &state)
 228 {
 229         const string &str = conv.get();
 230         if(str=="STOPPED")
 231                 state = XineStream::STOPPED;
 232         else if(str=="PAUSED")
 233                 state = XineStream::PAUSED;
 234         else if(str=="PLAYING")
 235                 state = XineStream::PLAYING;
 236         else
 237                 throw lexical_error(format("Conversion of '%s' to XineStream::State", str));
 238 }