[mythtv-commits] Ticket #1133: Support pcHDTV analog tuner

[MythTV]

#1133: Support pcHDTV analog tuner
---------------------+------------------------------------------------------
 Reporter:  danielk  |        Owner:  danielk
     Type:  task     |       Status:  new    
 Priority:  minor    |    Milestone:  0.20   
Component:  mythtv   |      Version:  head   
 Severity:  medium   |   Resolution:         
---------------------+------------------------------------------------------
Comment (by foom at fuhm.net):

 I've updated to this and tried it on my pcHDTV 3000 card. It works nicely.
 Two issues, though:
 1) the check for "pcHDTV" doesn't work, so I had to remove the check. I'm
 not sure what name it's supposed to be checking; my card identifies itself
 as:
 {{{DVB#0 Using DVB card 0, with frontend 'Oren OR51132 VSB/QAM
 Frontend'.}}}

 2) When switching to analog from digital (with recordings back to back, or
 in livetv), the channel change doesn't work the first time, even though
 the v4l2 call appears to succeed and the frequency returned from
 VIDIOC_G_FREQUENCY is the proper one. I did the following workaround,
 which gets the current frequency and re-sets it to the same thing every
 time a VIDIOC_DQBUF error happens. I know it isn't the "right" fix, but it
 at least makes things work for me. With this fix, there is static for the
 first couple seconds after the digital->analog change, then it's fine.

 {{{
 Index: NuppelVideoRecorder.cpp
 ===================================================================
 --- NuppelVideoRecorder.cpp     (revision 9028)
 +++ NuppelVideoRecorder.cpp     (working copy)
 @@ -1424,6 +1424,23 @@
          if (ioctl(fd, VIDIOC_DQBUF, &vbuf) < 0)
          {
              perror("VIDIOC_DQBUF");
 +
 +            {
 +                struct v4l2_frequency vf;
 +                int ioctlval;
 +                vf.tuner = 0; // use first tuner
 +                vf.type = V4L2_TUNER_ANALOG_TV;
 +                ioctlval = ioctl(fd, VIDIOC_G_FREQUENCY, &vf);
 +                if (ioctlval < 0) {
 +                    fprintf(stderr, "ERROR RESETTING\n");
 +                } else {
 +                    ioctlval = ioctl(fd, VIDIOC_S_FREQUENCY, &vf);
 +                    if (ioctlval < 0) {
 +                        fprintf(stderr, "ERROR RESETTING\n");
 +                    }
 +                }
 +            }
 +
              if (errno == -EINVAL)
              {
                  for (int i = 0; i < numbuffers; i++)
 Index: videosource.cpp
 ===================================================================
 --- videosource.cpp     (revision 9028)
 +++ videosource.cpp     (working copy)
 @@ -1932,8 +1932,7 @@
              signal_timeout->setValue(500);
              channel_timeout->setValue(3000);

 -            if (name.left(6) == "pcHDTV")
 -                buttonAnalog->setVisible(true);
 +            buttonAnalog->setVisible(true);

              break;
          default:
 }}}

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/1133>
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