On Mon, 26 Nov 2001, Brian J. Murrell wrote:
> Is anyone successfully using btaudio? What version (exactly) and what
> if any module parameters are you passing when you load it?
OK - I'm using the btaudio that came from Gerd's bttv-0.7.80, with the
following patch.
I do find that my audio drifts perhaps .1 of a second in 15 minutes. I've
got used to trimming it as I play with mplayer, but keep meaning to
investigate why. I've been assuming that my GETISPACE implementation
below is wrong.
Steve
--- bttv-0.7.80-orig/driver/btaudio.c Fri Sep 14 14:52:29 2001
+++ bttv-0.7.80/driver/btaudio.c Sun Oct 7 16:03:22 2001
@@ -757,6 +757,25 @@
case SNDCTL_DSP_SYNC:
/* NOP */
return 0;
+ case SNDCTL_DSP_GETISPACE:
+ {
+ audio_buf_info info;
+ if (!bta->recording) return -EINVAL;
+ info.fragsize = bta->block_bytes>>bta->sampleshift;
+ info.fragstotal = bta->block_count;
+ info.bytes = bta->read_count;
+ info.fragments = info.bytes / info.fragsize;
+#if 0
+ if (debug) {
+ printk(KERN_DEBUG "btaudio: SNDCTL_DSP_GETISPACE returning"
+ " fragsize=%d, fragstotal=%d bytes=%d fragments=%d\n",
+ info.fragsize, info.fragstotal, info.bytes, info.fragments);
+ }
+#endif
+ if (copy_to_user((void *)arg, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
#if 0 /* TODO */
case SNDCTL_DSP_GETTRIGGER:
case SNDCTL_DSP_SETTRIGGER:
