Added subtable ID and TSDT handling to 'libsi'

HISTORY

@@ -2652,7 +2652,7 @@ Video Disk Recorder Revision History
   actual CAM type as reported by the CAM. The 'ca.conf' file has been stripped
   down to the values 0..4.
 
-2004-02-15: Version 1.3.5
+2004-02-20: Version 1.3.5
 
 - Fixed reading the EPG preferred language parameter from 'setup.conf'.
 - Fixed switching to a visible programme in case the current channel has neither
@@ -2673,3 +2673,4 @@ Video Disk Recorder Revision History
   (necessary for the 'sky' plugin).
 - Fixed handling receivers in the 'sky' plugin, so that a recording on the same
   channel won't interrupt an ongoing Transfer mode.
+- Added subtable ID and TSDT handling to 'libsi' (thanks to Marcel Wiesweg).

libsi/headers.h

@@ -10,7 +10,7 @@
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
- *   $Id: headers.h 1.2 2003/12/13 10:43:26 kls Exp $
+ *   $Id: headers.h 1.3 2004/02/20 13:49:16 kls Exp $
  *                                                                         *
  ***************************************************************************/
 
@@ -257,7 +257,48 @@ struct pmt_info {
 
 /*
  *
- *    4) Network Information Table (NIT):
+ *    4) Transport Stream Description Table (TSDT):
+ *
+ *       - The TSDT carries a loop of descriptors that apply to
+ *         the whole transport stream. The syntax and semantics
+ *         of the TSDT are defined in newer versions of ISO/IEC 13818-1.
+ *
+ */
+
+#define TSDT_LEN 8
+
+struct tsdt {
+   u_char table_id                               :8;
+#if BYTE_ORDER == BIG_ENDIAN
+   u_char section_syntax_indicator               :1;
+   u_char dummy                                  :1; // has to be 0
+   u_char                                        :2;
+   u_char section_length_hi                      :4;
+#else
+   u_char section_length_hi                      :4;
+   u_char                                        :2;
+   u_char dummy                                  :1; // has to be 0
+   u_char section_syntax_indicator               :1;
+#endif
+   u_char section_length_lo                      :8;
+   u_char                                        :8;
+   u_char                                        :8;
+#if BYTE_ORDER == BIG_ENDIAN
+   u_char                                        :2;
+   u_char version_number                         :5;
+   u_char current_next_indicator                 :1;
+#else
+   u_char current_next_indicator                 :1;
+   u_char version_number                         :5;
+   u_char                                        :2;
+#endif
+   u_char section_number                         :8;
+   u_char last_section_number                    :8;
+};
+
+/*
+ *
+ *    5) Network Information Table (NIT):
  *
  *       - the NIT is intended to provide information about the physical
  *         network. The syntax and semantics of the NIT are defined in
@@ -468,7 +509,7 @@ struct eit {
    u_char original_network_id_hi                 :8;
    u_char original_network_id_lo                 :8;
    u_char segment_last_section_number            :8;
-   u_char segment_last_table_id                  :8;
+   u_char last_table_id                          :8;
 };
 
 #define EIT_EVENT_LEN 12

libsi/section.c

@@ -6,7 +6,7 @@
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
- *   $Id: section.c 1.2 2003/12/13 10:42:14 kls Exp $
+ *   $Id: section.c 1.3 2004/02/20 13:44:59 kls Exp $
  *                                                                         *
  ***************************************************************************/
 
@@ -76,6 +76,14 @@ void PMT::Stream::Parse() {
    streamDescriptors.setData(data+offset, HILO(s->ES_info_length));
 }
 
+/*********************** TSDT ***********************/
+
+void TSDT::Parse() {
+   unsigned int offset=0;
+   data.setPointerAndOffset<const tsdt>(s, offset);
+   transportStreamDescriptors.setDataAndOffset(data+offset, getLength()-offset-4, offset);
+}
+
 /*********************** NIT ***********************/
 
 int NIT::getNetworkId() const {
@@ -161,6 +169,14 @@ int EIT::getOriginalNetworkId() const {
    return HILO(s->original_network_id);
 }
 
+int EIT::getSegmentLastSectionNumber() const {
+   return s->segment_last_section_number;
+}
+
+int EIT::getLastTableId() const {
+   return s->last_table_id;
+}
+
 bool EIT::isPresentFollowing() const {
    return getTableId() == TableIdEIT_presentFollowing || getTableId() == TableIdEIT_presentFollowing_other;
 }

libsi/section.h

@@ -6,7 +6,7 @@
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
- *   $Id: section.h 1.2 2003/12/13 10:42:15 kls Exp $
+ *   $Id: section.h 1.3 2004/02/20 13:45:45 kls Exp $
  *                                                                         *
  ***************************************************************************/
 
@@ -77,6 +77,17 @@ private:
    const pmt *s;
 };
 
+class TSDT : public NumberedSection {
+public:
+   TSDT(const unsigned char *data, bool doCopy=true) : NumberedSection(data, doCopy) {}
+   TSDT() {}
+   DescriptorLoop transportStreamDescriptors;
+protected:
+   virtual void Parse();
+private:
+   const tsdt *s;
+};
+
 class NIT : public NumberedSection {
 public:
    NIT(const unsigned char *data, bool doCopy=true) : NumberedSection(data, doCopy) {}
@@ -166,6 +177,8 @@ public:
    int getServiceId() const;
    int getTransportStreamId() const;
    int getOriginalNetworkId() const;
+   int getSegmentLastSectionNumber() const;
+   int getLastTableId() const;
    StructureLoop<Event> eventLoop;
 
    //true if table conveys present/following information, false if it conveys schedule information

libsi/si.c

@@ -6,7 +6,7 @@
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
- *   $Id: si.c 1.6 2004/01/24 14:49:00 kls Exp $
+ *   $Id: si.c 1.7 2004/02/20 13:46:12 kls Exp $
  *                                                                         *
  ***************************************************************************/
 
@@ -61,6 +61,14 @@ bool CRCSection::CheckCRCAndParse() {
    return true;
 }
 
+int NumberedSection::getTableIdExtension() const {
+   return getTableIdExtension(data.getData());
+}
+
+int NumberedSection::getTableIdExtension(const unsigned char *d) {
+   return HILO(((const ExtendedSectionHeader *)d)->table_id_extension);
+}
+
 bool NumberedSection::getCurrentNextIndicator() const {
    return data.getData<ExtendedSectionHeader>()->current_next_indicator;
 }

libsi/si.h

@@ -6,7 +6,7 @@
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
- *   $Id: si.h 1.6 2004/01/12 16:19:11 kls Exp $
+ *   $Id: si.h 1.7 2004/02/20 13:47:09 kls Exp $
  *                                                                         *
  ***************************************************************************/
 
@@ -216,11 +216,14 @@ class NumberedSection : public CRCSection {
 public:
    NumberedSection(const unsigned char *data, bool doCopy=true) : CRCSection(data, doCopy) {}
    NumberedSection() {}
+   int getTableIdExtension() const;
    bool getCurrentNextIndicator() const;
    int getVersionNumber() const;
    int getSectionNumber() const;
    int getLastSectionNumber() const;
    bool moreThanOneSection()  const { return getLastSectionNumber()>0; }
+
+   static int getTableIdExtension(const unsigned char *d);
 };
 
 class VariableLengthPart : public Object {