• Takashi Sakamoto's avatar
    ALSA: bebob/firewire-lib: Add a quirk of wrong dbc in empty packet for M-Audio... · 9d59124c
    Takashi Sakamoto authored
    ALSA: bebob/firewire-lib: Add a quirk of wrong dbc in empty packet for M-Audio special Firewire series
    
    M-Audio Firewire 1814 has a quirk, ProjectMix I/O also has. They transmit
    empty packet with wrong value of dbc incremented by 8 at high sampling rate.
    According to IEC 61883-1, this value should be the same as the one in
    previous packet.
    
    This commit adds a flag named as CIP_EMPTY_HAS_WRONG_DBC. With flag, the value
    of dbc in empty packet is overwittern by an expected value.
    
    This is an example of this quirk:
    CIP Header 0	CIP Header 1	Payload size
    010D0000	9004F759	210
    010D0010	90040B59	210
    010D0020	90042359	210
    01020028	9004FFFF	2  <-
    010D0030	90043759	210
    010D0040	90044B59	210
    010D0050	90046359	210
    01020058	9004FFFF	2  <-
    010D0060	90047759	210
    010D0070	90048B59	210
    010D0080	9004A359	210
    01020088	9004FFFF	2  <-
    010D0090	9004B759	210
    010D00A0	9004CB59	210
    010D00B0	9004E359	210
    010200B8	9004FFFF	2  <-
    010D00C0	9004F759	210
    010D00D0	90040B59	210
    010D00E0	90042359	210
    Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    9d59124c
amdtp.h 7.98 KB