linux/sound/firewire/bebob
Takashi Sakamoto a02cb8f8de ALSA: firewire: remove support for 16 bit PCM samples in playback substream
In IEC 61883-6, AM824 is described as format of data block. In this
format, one data block consists of several data channels, which is aligned
to 32 bit. One data channel has 8 bit label field and 24 bit data field.
PCM frames are transferred in Multi Bit Linear Audio (MBLA) data channel.
This channel can include 16/20/24 bit PCM sample.

As long as I know, models which support IEC 61883-1/6 doesn't allow to
switch bit length of PCM sample in MBLA data channel. They always
transmit/receive PCM frames of 24 bit length. This can be seen for the
other models which support protocols similar to IEC 61883-1/6.

On the other hand, current drivers for these protocols supports 16 bit
length PCM sample in playback substream. In this case, PCM sample is put
into the MBLA data channel with 8 bit padding in LSB side. Although 16
bit PCM sample is major because it's in CD format, this doesn't represent
device capability as is.

This commit removes support for 16 bit PCM samples in playback substream.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-22 16:24:08 +02:00
..
Makefile ALSA: bebob: rename file with vendor-dependent code so that it's for Yamaha/Terratec 2016-08-24 15:35:03 +02:00
bebob.c ALSA: bebob: compare whole string for model name so that readers are not confused 2016-11-18 09:22:47 +01:00
bebob.h sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
bebob_command.c ALSA: firewire-lib/bebob/oxfw: improve response evaluation for AV/C commands 2017-04-05 21:37:23 +02:00
bebob_focusrite.c ALSA: bebob: constify various snd_bebob structures 2015-10-11 18:12:37 +02:00
bebob_hwdep.c ALSA: bebob: enclose identifiers referred by single function 2017-01-05 16:58:01 +01:00
bebob_maudio.c ALSA: bebob: use correct type for __be32 data 2015-10-19 11:57:03 +02:00
bebob_midi.c ALSA: firewire: Constify snd_rawmidi_ops 2017-01-12 12:50:38 +01:00
bebob_pcm.c ALSA: firewire: remove support for 16 bit PCM samples in playback substream 2017-05-22 16:24:08 +02:00
bebob_proc.c ALSA: bebob: constify various snd_bebob structures 2015-10-11 18:12:37 +02:00
bebob_stream.c ALSA: firewire-lib: enable the same feature as CIP_SKIP_INIT_DBC_CHECK flag 2016-05-10 17:04:01 +02:00
bebob_terratec.c ALSA: bebob: unify configurations for some models produced by Yamaha/Terratec 2016-08-24 15:35:11 +02:00
bebob_yamaha_terratec.c ALSA: bebob: unify configurations for some models produced by Yamaha/Terratec 2016-08-24 15:35:11 +02:00