add support for videotext (VBI)

[enigma2.git] / lib / dvb / decoder.cpp

diff --git a/lib/dvb/decoder.cpp b/lib/dvb/decoder.cpp
index 0f522b2c39ffbcc46eeb8ed0cdbf759add45bbe6..bf0014d87e2fbf85d26f2c782e6a075333c65c3b 100644 (file)
--- a/lib/dvb/decoder.cpp
+++ b/lib/dvb/decoder.cpp
@@ -301,6 +301,57 @@ eDVBPCR::~eDVBPCR()
                ::close(m_fd_demux);
 }
 
+DEFINE_REF(eDVBVText);
+
+eDVBVText::eDVBVText(eDVBDemux *demux): m_demux(demux)
+{
+       char filename[128];
+#if HAVE_DVB_API_VERSION < 3
+       sprintf(filename, "/dev/dvb/card%d/demux%d", demux->adapter, demux->demux);
+#else
+       sprintf(filename, "/dev/dvb/adapter%d/demux%d", demux->adapter, demux->demux);
+#endif
+       m_fd_demux = ::open(filename, O_RDWR);
+       if (m_fd_demux < 0)
+               eWarning("%s: %m", filename);
+}
+
+int eDVBVText::startPid(int pid)
+{
+       if (m_fd_demux < 0)
+               return -1;
+       dmx_pes_filter_params pes;
+
+       pes.pid      = pid;
+       pes.input    = DMX_IN_FRONTEND;
+       pes.output   = DMX_OUT_DECODER;
+       pes.pes_type = DMX_PES_TELETEXT;
+       pes.flags    = 0;
+       if (::ioctl(m_fd_demux, DMX_SET_PES_FILTER, &pes) < 0)
+       {
+               eWarning("video: DMX_SET_PES_FILTER: %m");
+               return -errno;
+       }
+       if (::ioctl(m_fd_demux, DMX_START) < 0)
+       {
+               eWarning("video: DMX_START: %m");
+               return -errno;
+       }
+       return 0;
+}
+
+void eDVBVText::stop()
+{
+       if (::ioctl(m_fd_demux, DMX_STOP) < 0)
+               eWarning("video: DMX_STOP: %m");
+}
+
+eDVBVText::~eDVBVText()
+{
+       if (m_fd_demux >= 0)
+               ::close(m_fd_demux);
+}
+
 DEFINE_REF(eTSMPEGDecoder);
 
 int eTSMPEGDecoder::setState()
@@ -416,6 +467,22 @@ int eTSMPEGDecoder::setState()
                }
                m_changed &= ~changeAudio;
        }
+       if (m_changed & changeText)
+       {
+               if (m_text)
+                       m_text->stop();
+               m_text = 0;
+               if ((m_textpid >= 0) && (m_textpid < 0x1FFF))
+               {
+                       m_text = new eDVBVText(m_demux);
+                       if (m_text->startPid(m_textpid))
+                       {
+                               eWarning("text: startpid failed!");
+                               res = -1;
+                       }
+               }
+               m_changed &= ~changeText;
+       }
 #endif
        return res;
 }
@@ -464,6 +531,16 @@ RESULT eTSMPEGDecoder::setSyncPCR(int pcrpid)
        return 0;
 }
 
+RESULT eTSMPEGDecoder::setTextPID(int textpid)
+{
+       if (m_textpid != textpid)
+       {
+               m_changed |= changeText;
+               m_textpid = textpid;
+       }
+       return 0;
+}
+
 RESULT eTSMPEGDecoder::setSyncMaster(int who)
 {
        return -1;