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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2017-03-22 15:30:16 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-03-28 13:33:26 +0300 |
| commit | 9863874f02e1cca65bdb112336250890b2ded64a (patch) | |
| tree | d14a93124402ac63f01a8926a3623bb801a6348f /sound/firewire/amdtp-stream.h | |
| parent | a04513f8b1980e7ddd9082461aceaf8b3e8f4981 (diff) | |
| download | linux-9863874f02e1cca65bdb112336250890b2ded64a.tar.xz | |
ALSA: firewire-lib: add support for source packet header field in CIP header
In IEC 61883-1, CIP headers can have a SPH field. When a packet has 1 in
SPH field of its CIP header, the packet has a source packet headers. A
source packet header consists of 32 bit field (= 1 quadlet) and it
transfers time stamp, which is the same value as the lower 25 bits of the
IEEE 1394 CYCLE_TIMER register and the rest is zero.
This commit just supports source packet header field because IEC 61883-1
includes ambiguity the position of this header and its count. Each
protocol layer is allowed to have actual implementation according its
requirements.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/amdtp-stream.h')
| -rw-r--r-- | sound/firewire/amdtp-stream.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h index edf5646b3708..679053d9c28f 100644 --- a/sound/firewire/amdtp-stream.h +++ b/sound/firewire/amdtp-stream.h @@ -106,6 +106,7 @@ struct amdtp_stream { unsigned int source_node_id_field; unsigned int data_block_quadlets; unsigned int data_block_counter; + unsigned int sph; unsigned int fmt; unsigned int fdf; /* quirk: fixed interval of dbc between previos/current packets. */ |