• Takashi Sakamoto's avatar
    ALSA: firewire-lib: add support for source packet header field in CIP header · 9863874f
    Takashi Sakamoto authored
    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: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    9863874f
amdtp-stream.h 7.21 KB