Added support for multiple audio language codes in ISO639LanguageDescriptors to 'libsi'

HISTORY

@@ -3790,3 +3790,5 @@ Video Disk Recorder Revision History
 - Replaced the ':' delimiter between hour and minute in recording file names with
   a '.' under Linux, too. Existing recordings with ':' as delimiter will still work.
 - Implemented the SVDRP command MOVC (thanks to Andreas Brachold).
+- Added support for multiple audio language codes in ISO639LanguageDescriptors to
+  'libsi' (thanks to Marcel Wiesweg).

libsi/descriptor.c

@@ -6,7 +6,7 @@
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
- *   $Id: descriptor.c 1.14 2004/10/16 09:51:05 kls Exp $
+ *   $Id: descriptor.c 1.15 2005/09/03 15:16:49 kls Exp $
  *                                                                         *
  ***************************************************************************/
 
@@ -655,14 +655,32 @@ LinkageType LinkageDescriptor::getLinkageType() const {
 }
 
 void ISO639LanguageDescriptor::Parse() {
-   unsigned int offset=0;
-   data.setPointerAndOffset<const descr_iso_639_language>(s, offset);
+   languageLoop.setData(data+sizeof(descr_iso_639_language), getLength()-sizeof(descr_iso_639_language));
+   
+   //all this is for backwards compatibility only
+   Loop::Iterator it;
+   Language first;
+   if (languageLoop.getNext(first, it)) {
+      languageCode[0]=first.languageCode[0];
+      languageCode[1]=first.languageCode[1];
+      languageCode[2]=first.languageCode[2];
+      languageCode[3]=0;
+   } else
+      languageCode[0]=0;
+}
+
+void ISO639LanguageDescriptor::Language::Parse() {
+   s=data.getData<const descr_iso_639_language_loop>();
    languageCode[0]=s->lang_code1;
    languageCode[1]=s->lang_code2;
    languageCode[2]=s->lang_code3;
    languageCode[3]=0;
 }
 
+AudioType ISO639LanguageDescriptor::Language::getAudioType() {
+   return (AudioType)s->audio_type;
+}
+
 void PDCDescriptor::Parse() {
    unsigned int offset=0;
    data.setPointerAndOffset<const descr_pdc>(s, offset);

libsi/descriptor.h

@@ -6,7 +6,7 @@
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
- *   $Id: descriptor.h 1.12 2005/05/08 14:08:19 kls Exp $
+ *   $Id: descriptor.h 1.13 2005/09/03 15:17:35 kls Exp $
  *                                                                         *
  ***************************************************************************/
 
@@ -392,7 +392,18 @@ private:
 
 class ISO639LanguageDescriptor : public Descriptor {
 public:
-   char languageCode[4];
+   char languageCode[4]; //for backwards compatibility
+   class Language : public LoopElement {
+   public:
+      virtual int getLength() { return sizeof(descr_iso_639_language_loop); }
+      char languageCode[4];
+      AudioType getAudioType();
+   protected:
+      virtual void Parse();
+   private:
+      const descr_iso_639_language_loop *s;
+   };
+   StructureLoop<Language> languageLoop;
 protected:
    virtual void Parse();
 private:

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 1.4 2004/02/22 11:12:46 kls Exp $
+ *   $Id: headers.h 1.5 2005/09/03 15:18:16 kls Exp $
  *                                                                         *
  ***************************************************************************/
 
@@ -821,9 +821,13 @@ struct descr_ca {
 struct descr_iso_639_language {
    u_char descriptor_tag                         :8;
    u_char descriptor_length                      :8;
+};
+
+struct descr_iso_639_language_loop {
    u_char lang_code1                             :8;
    u_char lang_code2                             :8;
    u_char lang_code3                             :8;
+   u_char audio_type                             :8;
 };
 
 /* 0x13 carousel_identifier_descriptor */

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 1.11 2004/10/16 09:58:10 kls Exp $
+ *   $Id: si.h 1.12 2005/09/03 15:19:00 kls Exp $
  *                                                                         *
  ***************************************************************************/
 
@@ -166,6 +166,12 @@ enum LinkageType { LinkageTypeInformationService = 0x01,
                    LinkageTypeTSContainingSsuBatOrNit = 0x0A
                  };
 
+enum AudioType { AudioTypeUndefined = 0x00,
+                 AudioTypeCleanEffects = 0x01,
+                 AudioTypeHearingImpaired = 0x02,
+                 AudioTypeVisualImpairedCommentary = 0x03
+               };
+
 /* Some principles:
    - Objects that return references to other objects contained in their data must make sure
      that the returned objects have been parsed.