Sound in CX88

[Jelle Foks <jelle (at) foks.8m.com>]

Adam Sulmicki wrote:
> 
>> So, we set television input .extadc = 0 ... anything else?
> 
> as far as I can tell this is irrelevant as far as mpeg recording goes.
> it seems to work with it set to either 1 or 0.
> 
>> If you want to create a patch and send it in with your sign-off, then
>> Il apply it for you.  Otherwise, I can just make the change above to
>> the television mux.
> 
> so no change seems to be needed.
> 
> the issue was that tvtime was muting the sound, and I needed to
> 
> v4l2-ctl -d /dev/video1 -c mute=0 -c volume=63
> 
>>> Now I get sound with mpeg stream (video1)!

Maybe the attached patch works for you too? The patch unmutes/mutes the
audio in streamon/streamoff of cx88-blackbird.c

With that patch you may (should?) not need to do the v4lctl command anymore.

Jelle.

diff -r 4a2a265bd791 linux/drivers/media/video/cx88/cx88-blackbird.c
--- a/linux/drivers/media/video/cx88/cx88-blackbird.c	Wed Nov 22 13:52:36 2006 -0200
+++ b/linux/drivers/media/video/cx88/cx88-blackbird.c	Fri Nov 24 19:21:16 2006 -0500
 (at)  (at)  -871,12 +871,24  (at)  (at)  static int vidioc_streamon(struct file *
 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 {
 	struct cx8802_fh  *fh   = priv;
+	struct cx8802_dev *dev  = fh->dev;
+	struct cx88_core *core = dev->core;
+
+	/* unmute audio source */
+	cx_clear(AUD_VOL_CTL, (1 << 6));
+
 	return videobuf_streamon(&fh->mpegq);
 }
 
 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 {
 	struct cx8802_fh  *fh   = priv;
+	struct cx8802_dev *dev  = fh->dev;
+	struct cx88_core *core = dev->core;
+
+	/* mute audio source */
+	cx_set(AUD_VOL_CTL, (1 << 6));
+
 	return videobuf_streamoff(&fh->mpegq);
 }
 

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