[sigrok-devel] PulseView and sigrok-cli give different output on same I2S input

[Aleksander A. <af...@gm...>]

Hello everyone,

I have a dump of an I2S signal [1]. PulseView seems to be pretty happy with
it [2]. However when I try to decode the same file with sigrok-cli I get a
lot of warnings and wrong data:

```
$ sigrok-cli -i /home/eax/temp/i2s-pmod.sr -P i2s
...

i2s-1: Received 3-bit word, expected 4-bit word
i2s-1: Right channel: 00000000
i2s-1: Received 4-bit word, expected 3-bit word
i2s-1: Left channel: 00000004
i2s-1: Right channel: 00000000
i2s-1: Received 3-bit word, expected 4-bit word
i2s-1: Left channel: 00000000
i2s-1: Right channel: 00000000
i2s-1: Received 2-bit word, expected 3-bit word
i2s-1: Left channel: 00000000
```

sigrok-cli version:

```
$ sigrok-cli --version
sigrok-cli 0.8.0-git-a30c837

Libraries and features:
- libsigrok 0.6.0-git-17e0251d/4:0:0 (rt: 0.6.0-git-17e0251d/4:0:0).
 - Libs:
  - glib 2.56.1 (rt: 2.56.1/5601:1)
  - libzip 1.5.1
  - libserialport 0.1.1/1:0:1 (rt: 0.1.1/1:0:1)
  - libusb-1.0 1.0.22.11312 API 0x01000106
  - libftdi 1.4
  - Host: x86_64-pc-linux-gnu, little-endian.
  - SCPI backends: TCP, serial, USBTMC.
- libsigrokdecode 0.6.0-git-5166b03/4:0:0 (rt: 0.6.0-git-5166b03/4:0:0).
 - Libs:
  - glib 2.56.1 (rt: 2.56.1/5601:1)
  - Python 3.6.6 / 0x30606f0 (API 1013, ABI 3)
  - Host: x86_64-pc-linux-gnu, little-endian.
```

Am I doing something wrong or is it a bug?

[1]: https://afiskon.ru/s/30/075e2fc950_i2s-pmod.sr
[2]: https://afiskon.ru/s/7b/171f92fdbb_temp.png

-- 
Best regards,
Aleksander Alekseev