From 2cae2ed28c0b6055b504e6fd00a79bba176d0637 Mon Sep 17 00:00:00 2001
From: Klaus Schmidinger <vdr@tvdr.de>
Date: Fri, 11 Nov 2005 16:13:19 +0100
Subject: Modified switching to Dolby Digital audio in live mode

---
 CONTRIBUTORS |  2 ++
 HISTORY      |  5 +++++
 dvbdevice.c  | 11 +++++++++--
 dvbdevice.h  |  4 +++-
 4 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 42a76a92..c3b50b17 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -290,6 +290,8 @@ Werner Fink <werner@suse.de>
  for reporting a problem with ensuring there is a current audio track in case there
  is only one track
  for enabling a device to detach all receivers for a given PID
+ for modifying switching to Dolby Digital audio in live mode, if the driver
+ and firmware can handle live DD without the need of a Transfer Mode
 
 Rolf Hakenes <hakenes@hippomi.de>
  for providing 'libdtv' and adapting the EIT mechanisms to it
diff --git a/HISTORY b/HISTORY
index 1d73209f..a9517f26 100644
--- a/HISTORY
+++ b/HISTORY
@@ -3947,3 +3947,8 @@ Video Disk Recorder Revision History
   repeating timer (thanks to Marco Schlüßler).
 - No longer removing superfluous hyphens in EPG data - would become too
   language dependent to handle all kinds of exceptions.
+- Modified switching to Dolby Digital audio in live mode, if the driver
+  and firmware can handle live DD without the need of a Transfer Mode (thanks
+  to Werner Fink). Live DD mode requires a full featured DVB card and a
+  LinuxDVB driver with firmware version 0x2622 or higher. Older versions will
+  use Transfer Mode just like before.
diff --git a/dvbdevice.c b/dvbdevice.c
index 3f9e144e..b59076cd 100644
--- a/dvbdevice.c
+++ b/dvbdevice.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: dvbdevice.c 1.136 2005/08/21 09:17:20 kls Exp $
+ * $Id: dvbdevice.c 1.137 2005/11/11 14:53:52 kls Exp $
  */
 
 #include "dvbdevice.h"
@@ -659,6 +659,11 @@ eVideoSystem cDvbDevice::GetVideoSystem(void)
   return VideoSystem;
 }
 
+bool cDvbDevice::SetAudioBypass(bool On)
+{
+  return ioctl(fd_audio, AUDIO_SET_BYPASS_MODE, On) == 0;
+}
+
 //                            ptAudio        ptVideo        ptPcr        ptTeletext        ptDolby        ptOther
 dmx_pes_type_t PesTypes[] = { DMX_PES_AUDIO, DMX_PES_VIDEO, DMX_PES_PCR, DMX_PES_TELETEXT, DMX_PES_OTHER, DMX_PES_OTHER };
 
@@ -841,6 +846,7 @@ bool cDvbDevice::SetChannelDevice(const cChannel *Channel, bool LiveView)
   // PID settings:
 
   if (TurnOnLivePIDs) {
+     SetAudioBypass(false);
      if (!(AddPid(Channel->Ppid(), ptPcr) && AddPid(Channel->Vpid(), ptVideo) && AddPid(Channel->Apid(0), ptAudio))) {
         esyslog("ERROR: failed to set PIDs for channel %d on device %d", Channel->Number(), CardIndex() + 1);
         return false;
@@ -910,7 +916,8 @@ void cDvbDevice::SetAudioTrackDevice(eTrackType Type)
 {
   const tTrackId *TrackId = GetTrack(Type);
   if (TrackId && TrackId->id) {
-     if (IS_AUDIO_TRACK(Type)) {
+     SetAudioBypass(false);
+     if (IS_AUDIO_TRACK(Type) || (IS_DOLBY_TRACK(Type) && SetAudioBypass(true))) {
         if (pidHandles[ptAudio].pid && pidHandles[ptAudio].pid != TrackId->id) {
            DetachAll(pidHandles[ptAudio].pid);
            pidHandles[ptAudio].pid = TrackId->id;
diff --git a/dvbdevice.h b/dvbdevice.h
index 7da7e4f1..ed0cef8a 100644
--- a/dvbdevice.h
+++ b/dvbdevice.h
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: dvbdevice.h 1.35 2005/08/20 15:20:15 kls Exp $
+ * $Id: dvbdevice.h 1.36 2005/11/11 14:51:38 kls Exp $
  */
 
 #ifndef __DVBDEVICE_H
@@ -69,6 +69,8 @@ public:
 
 // PID handle facilities
 
+private:
+  bool SetAudioBypass(bool On);
 protected:
   virtual bool SetPid(cPidHandle *Handle, int Type, bool On);
 
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