diff options
| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2015-09-19 04:21:56 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-09-29 12:48:02 +0200 |
| commit | 51c29fd21389d9995a8a18a91eeb8dd1220a2119 (patch) | |
| tree | bc45c96ca22ad4eb7754da35d99a5394ed831a61 /sound/firewire/amdtp-am824.h | |
| parent | ALSA: firewire-lib: add data block processing layer for AM824 format (diff) | |
| download | linux-51c29fd21389d9995a8a18a91eeb8dd1220a2119.tar.xz linux-51c29fd21389d9995a8a18a91eeb8dd1220a2119.zip | |
ALSA: firewire-lib: rename parameter setting function for AM824 with FDF field
The value of FDF field in CIP header is protocol-dependent. Thus, it's
better to allow data block processing layer to decide the value in any
timing.
In AM824 data format, the value of FDF field in CIP header indicates
N-flag and Nominal Sampling Frequency Code (sfc). The N-flag is for
switching 'Clock-based rate control mode' and 'Command-based rate control
mode'. In our implementation, 'Clock-based rate control mode' is just
supported. Therefore, When sampling transfer frequency is decided, then
the FDF can be set.
This commit replaces 'amdtp_stream_set_parameters' with
'amdtp_am824_set_parameters' to set the FDF. This is the same timing
to decide the ration between the number of data blocks and the number of
PCM frames.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/amdtp-am824.h')
| -rw-r--r-- | sound/firewire/amdtp-am824.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/firewire/amdtp-am824.h b/sound/firewire/amdtp-am824.h index ed96ac56628f..cfc0d61e0db4 100644 --- a/sound/firewire/amdtp-am824.h +++ b/sound/firewire/amdtp-am824.h @@ -3,6 +3,11 @@ #include "amdtp-stream.h" +int amdtp_am824_set_parameters(struct amdtp_stream *s, unsigned int rate, + unsigned int pcm_channels, + unsigned int midi_ports, + bool double_pcm_frames); + int amdtp_am824_init(struct amdtp_stream *s, struct fw_unit *unit, enum amdtp_stream_direction dir, enum cip_flags flags); #endif |