[Expired for alsa-driver (Ubuntu) because there has been no activity for
60 days.]
** Changed in: alsa-driver (Ubuntu)
Status: Incomplete => Expired
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/770526
Title:
C-Media CM106 SPDIF-IN does not seem to record
Status in alsa-driver package in Ubuntu:
Expired
Bug description:
Hello,
I have a C-MEDIA CM106 USB External SoundCard. And its been a while
since I used SPDIF in Linux. I am trying to figure out why SPDIF-IN or
Optical IN is not recording. I did find nice tutorials about HOW to
RECORD sound using SPDIF. And here is my current output:
OS: ubuntu 10.10 x64
Kernel: default-generic (based on updates)
Current kernel: Linux atlantis 2.6.35-28-generic #50-Ubuntu SMP Fri Mar 18
18:42:20 UTC 2011 x86_64 GNU/Linux
USB Device:
Bus 003 Device 007: ID 0d8c:0102 C-Media Electronics, Inc. CM106 Like Sound
Device
AlsaMixer:
│ │ │ │ │ │ │
│
│ │ │ │ │ │ │
│
│ │ │ │ │ │ │
│
│ │▒▒│ │ │ │ │
│
│ │▒▒│ │▒▒│ │ │
│
│ │▒▒│ │▒▒│ │▒▒│
│
│ │▒▒│ │▒▒│ │▒▒│
│
│ │▒▒│ │▒▒│ │▒▒│
│
│ │▒▒│ │▒▒│ │▒▒│
│
│ │▒▒│ │▒▒│ │▒▒│
│
│ │▒▒│ │▒▒│ │▒▒│
│
│ └──┘ └──┘ └──┘ L R
│
│ ------- ------- ------- CAPTURE
│
│ 70<>70 55<>55 46<>46
│
│ < PCM > Line Mic S/PDIF In
I am not sure if S/PDIF IN should have bars in this case.
Tryed to use following commands:
1. arecord -D hw:2,0 -f dat | aplay -D hw:1,0
2. arecord -D hw:2,0 -f dat | ac3dec -D hw:1,0
2. arecord -D hw:2,0 -f dat -t raw | ac3dec -D surround51:1,0 -6
3. arecord -D spdif:2,0 -f dat -t raw | ac3dec -D surround51:1,0 -6
4. arecord -D spdif:2,0 -t raw -f dat | ac3dec -D surround51:1,0
Output 1:
andrej@atlantis:~$ arecord -D spdif:2,0 -t raw -f dat | ac3dec -D
surround51:1,0
Recording raw data 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz,
Stereo
2.0 Mode 48.0 KHz 32 kbps Complete Main Audio Service
Using PCM device 'surround51:1,0'
Output 2:
andrej@atlantis:~$ arecord -D spdif:2,0 -t raw -f dat | ac3dec -D
surround51:1,0 -6
Recording raw data 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz,
Stereo
2.0 Mode 48.0 KHz 32 kbps Complete Main Audio Service
unsupported 1/1 channels 6
Driver works fine. Analog input works (both MIC). Analog output works. Tryed
stereo only for now. I wanted to use this card
for Optical IN. I am combining it with Xbox360 for better game atmosphere.
Windows7, XP work great using realtime in GraphEdit. But I wen't to Ubuntu
10.10 x64.
Tryed to pipe also with:
arecord -D spdif:2,0 -t raw -f dat | spdifextract | ac3dec -D surround51:1,0
-6
spdifextract:
code from forum about converting from 24,32bit to 16 or something like
that. can't remeber that much.
CODE:
#include <stdio.h>
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned long uint32_t;
#define SPDIF_SYNC 0x4e1ff872
struct spdif_head_t {
uint32_t sync;
uint8_t type;
uint8_t bsmod;
uint16_t databits;
};
int spdif_sync(FILE *in, struct spdif_head_t *header)
{
uint32_t byte;
uint32_t dword = 0xffffffff;
while ((byte = fgetc(in)) != EOF) {
dword = dword >> 8 | (byte << 24);
if (dword == SPDIF_SYNC) {
header->sync = dword;
if ((byte = fgetc(in)) == EOF)
return -1;
header->type = byte;
if ((byte = fgetc(in)) == EOF)
return -1;
header->bsmod = byte;
if ((byte = fgetc(in)) == EOF)
return -1;
header->databits = byte;
if ((byte = fgetc(in)) == EOF)
return -1;
header->databits |= byte << 8;
return 0;
}
}
return -1;
}
int main(int argc, char **argv)
{
char *stream_name = "stdin";
FILE *in = stdin, *out = stdout;
fpos_t fpos;
int i, byte0, byte1, pos, last_pos;
struct spdif_head_t header;
last_pos = 0;
while (spdif_sync(in, &header) == 0) {
/* fgetpos(in, &fpos);
pos = *((int *) &fpos);
printf("Found SPDIF sync at %010lx: %5x, len %5x\n", pos,
pos - last_pos,
header.databits / 8);
last_pos = pos;
*/
for (i = 0; i < header.databits / 8 / 2; i++) {
if ((byte1 = fgetc(in)) == EOF)
break;
if ((byte0 = fgetc(in)) == EOF)
break;
fputc(byte0, out);
fputc(byte1, out);
}
}
return 0;
}
CODE END;
And thats it for now. Still searching for a solution. Just as long its
not windows. I converted all my machines to linux and I am happy how
stable it is.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/770526/+subscriptions
--
Mailing list: https://launchpad.net/~touch-packages
Post to : [email protected]
Unsubscribe : https://launchpad.net/~touch-packages
More help : https://help.launchpad.net/ListHelp
