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SubjectRe: [x86_64] bttv: linux 2.6.16-rc1 mplayer fails to record ALSA audio and fails tune TV.
Hi,

With 2.6.16-rc1, it's recording no audio, and it's recording
black-and-white noise on video. Wooo, it's getting worse.

$ uname -a
Linux dancer64 2.6.16-rc1dancer-dirty #1 Wed Jan 18 08:11:24 JST 2006 x86_64 GNU/Linux


From the information that I've gathered so far it seems like:
1. bttv was rewritten to support v4l2
2. record via v4l2 is broken, v4l1 is not (xawtv works, mencoder broken.)
I've heard mencoder should work with v4l1, but I have not yet confirmed.

bttv-cards.c:

[BTTV_BOARD_GVBCTV5PCI] = {
.name = "IODATA GV-BCTV5/PCI",
.video_inputs = 3,
.audio_inputs = 1,
.tuner = 0,
.svhs = 2,
.gpiomask = 0x0f0f80,
.muxsel = {2, 3, 1, 0 },
.audiomux = {0x030000, 0x010000, 0, 0, 0x020000, 0},
.no_msp34xx = 1,
.pll = PLL_28,
.tuner_type = TUNER_PHILIPS_NTSC_M,
.tuner_addr = ADDR_UNSET,
.radio_addr = ADDR_UNSET,
.audio_hook = gvbctv5pci_audio,
.has_radio = 1,
},
dmesg gives me an impression that this path is taken properly:
bttv: driver version 0.9.16 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
bttv: Bt8xx card found (0).
bttv0: Bt878 (rev 17) at 0000:03:0b.0, irq: 22, latency: 64, mmio: 0xfdcff000
bttv0: detected: I-O Data Co. GV-BCTV5/PCI [card=81], PCI subsystem ID is 10fc:d018
bttv0: using: IODATA GV-BCTV5/PCI [card=81,autodetected]
bttv0: gpio: en=00000000, out=00000000 in=00f6f0f7 [init]
bttv0: using tuner=17
bttv0: i2c: checking for TDA9875 @ 0xb0... not found
bttv0: i2c: checking for TDA7432 @ 0x8a... not found
bttv0: i2c: checking for TDA9887 @ 0x86... not found
tuner 0-0061: chip found @ 0xc2 (bt878 #0 [sw])
tuner 0-0061: type set to 17 (Philips NTSC_M (MK2))
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: registered device radio0
bttv0: PLL: 28636363 => 35468950 .. ok

v4l-info is dumped with:

printf("inputs\n");
for (i = 0;; i++) {
memset(&input,0,sizeof(input));
input.index = i;
if (-1 == ioctl(fd,VIDIOC_ENUMINPUT,&input))
break;
printf(" VIDIOC_ENUMINPUT(%d)\n",i);
print_struct(stdout,desc_v4l2_input,&input,"",tab);
}
printf("\n");

which is probably handled in
bttv-driver.c:static int bttv_common_ioctls(struct bttv *btv, unsigned int cmd, void *arg)

which unconditionally sets:
i->audioset = 0;



> last successful one was 2.6.14-rc5.
>
>
> I've noticed that there is a v4l-info command, which dumps v4l2
> information, and it seems to signify that v4l2 is giving a different
> answer.
>
> The following is a diff, which seems to signify that this difference
> exists in the two versions:
>
> - audioset : 1
> + audioset : 0
>


regards,
junichi
--
dancer@{debian.org,netfort.gr.jp} Debian Project
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