add support for videotext (VBI)

so now the videotext from the TV is useable
(needs new drivers!)

6 files changed, 115 insertions, 3 deletions

diff --git a/lib/dvb/decoder.cpp b/lib/dvb/decoder.cpp
index 0f522b2c..bf0014d8 100644
--- 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;
diff --git a/lib/dvb/decoder.h b/lib/dvb/decoder.h
index fb543fed..f1d074db 100644
--- a/lib/dvb/decoder.h
+++ b/lib/dvb/decoder.h
@@ -62,6 +62,19 @@ public:
 	virtual ~eDVBPCR();
 };
 
+class eDVBVText: public iObject
+{
+DECLARE_REF(eDVBVText);
+private:
+	ePtr<eDVBDemux> m_demux;
+	int m_fd_demux;
+public:
+	eDVBVText(eDVBDemux *demux);
+	int startPid(int pid);
+	void stop();
+	virtual ~eDVBVText();
+};
+
 class eTSMPEGDecoder: public Object, public iTSMPEGDecoder
 {
 DECLARE_REF(eTSMPEGDecoder);
@@ -70,12 +83,14 @@ private:
 	ePtr<eDVBAudio> m_audio;
 	ePtr<eDVBVideo> m_video;
 	ePtr<eDVBPCR> m_pcr;
-	int m_vpid, m_apid, m_atype, m_pcrpid;
+	ePtr<eDVBVText> m_text;
+	int m_vpid, m_apid, m_atype, m_pcrpid, m_textpid;
 	enum
 	{
 		changeVideo = 1, 
 		changeAudio = 2, 
-		changePCR   = 4
+		changePCR   = 4,
+		changeText  = 8
 	};
 	int m_changed;
 	int m_is_ff, m_is_sm, m_is_trickmode;
@@ -90,6 +105,7 @@ public:
 	RESULT setVideoPID(int vpid);
 	RESULT setAudioPID(int apid, int type);
 	RESULT setSyncPCR(int pcrpid);
+	RESULT setTextPID(int textpid);
 	RESULT setSyncMaster(int who);
 	RESULT start();
 	RESULT freeze(int cont);
diff --git a/lib/dvb/demux.h b/lib/dvb/demux.h
index 869c2e9b..167aa785 100644
--- a/lib/dvb/demux.h
+++ b/lib/dvb/demux.h
@@ -32,6 +32,7 @@ private:
 	friend class eDVBAudio;
 	friend class eDVBVideo;
 	friend class eDVBPCR;
+	friend class eDVBVText;
 	friend class eDVBTSRecorder;
 	friend class eDVBCAService;
 	Signal1<void, int> m_event;
diff --git a/lib/dvb/idvb.h b/lib/dvb/idvb.h
index 8aa3391d..90457dc1 100644
--- a/lib/dvb/idvb.h
+++ b/lib/dvb/idvb.h
@@ -466,12 +466,15 @@ public:
 		/** Set Displayed Audio PID and type */
 	virtual RESULT setAudioPID(int apid, int type)=0;
 
+		/** Set Displayed Videotext PID */
+	virtual RESULT setTextPID(int vpid)=0;
+
 		/** Set Sync mode to PCR */
 	virtual RESULT setSyncPCR(int pcrpid)=0;
 	enum { sm_Audio, sm_Video };
 		/** Set Sync mode to either audio or video master */
 	virtual RESULT setSyncMaster(int who)=0;
-	
+
 		/** Apply settings */
 	virtual RESULT start()=0;
 	
diff --git a/lib/dvb/pmt.cpp b/lib/dvb/pmt.cpp
index 2455b95f..a5e9be46 100644
--- a/lib/dvb/pmt.cpp
+++ b/lib/dvb/pmt.cpp
@@ -6,6 +6,7 @@
 #include <lib/dvb_ci/dvbci.h>
 #include <lib/dvb/epgcache.h>
 #include <dvbsi++/ca_program_map_section.h>
+#include <dvbsi++/teletext_descriptor.h>
 #include <dvbsi++/descriptor_tag.h>
 #include <dvbsi++/iso639_language_descriptor.h>
 #include <dvbsi++/stream_identifier_descriptor.h>
@@ -138,17 +139,20 @@ int eDVBServicePMTHandler::getProgramInfo(struct program &program)
 	program.pcrPid = -1;
 	program.isCrypted = false;
 	program.pmtPid = -1;
+	program.textPid = -1;
 
 	if (!m_PMT.getCurrent(ptr))
 	{
 		int cached_apid_ac3 = -1;
 		int cached_apid_mpeg = -1;
 		int cached_vpid = -1;
+		int cached_tpid = -1;
 		if ( m_service && !m_service->cacheEmpty() )
 		{
 			cached_vpid = m_service->getCachePID(eDVBService::cVPID);
 			cached_apid_mpeg = m_service->getCachePID(eDVBService::cAC3PID);
 			cached_apid_ac3 = m_service->getCachePID(eDVBService::cAPID);
+			cached_tpid = m_service->getCachePID(eDVBService::cTPID);
 		}
 		eDVBTableSpec table_spec;
 		ptr->getSpec(table_spec);
@@ -193,6 +197,10 @@ int eDVBServicePMTHandler::getProgramInfo(struct program &program)
 					{
 						switch ((*desc)->getTag())
 						{
+						case TELETEXT_DESCRIPTOR:
+							if ( program.textPid == -1 || (*es)->getPid() == cached_tpid )
+								program.textPid = (*es)->getPid();
+							break;
 						case AC3_DESCRIPTOR:
 							if (!isvideo)
 							{
@@ -269,6 +277,7 @@ int eDVBServicePMTHandler::getProgramInfo(struct program &program)
 			apid_ac3 = m_service->getCachePID(eDVBService::cAC3PID),
 			apid_mpeg = m_service->getCachePID(eDVBService::cAPID),
 			pcrpid = m_service->getCachePID(eDVBService::cPCRPID),
+			tpid = m_service->getCachePID(eDVBService::cTPID),
 			cnt=0;
 		if ( vpid != -1 )
 		{
@@ -298,6 +307,11 @@ int eDVBServicePMTHandler::getProgramInfo(struct program &program)
 			++cnt;
 			program.pcrPid = pcrpid;
 		}
+		if ( tpid != -1 )
+		{
+			++cnt;
+			program.textPid = tpid;
+		}
 		if ( cnt )
 			return 0;
 	}
diff --git a/lib/dvb/pmt.h b/lib/dvb/pmt.h
index aabac24d..fb16ea5c 100644
--- a/lib/dvb/pmt.h
+++ b/lib/dvb/pmt.h
@@ -111,6 +111,7 @@ public:
 		// ca info
 		int pcrPid;
 		int pmtPid;
+		int textPid;
 		bool isCrypted;
 	};