Hi,
In Linux firewire subsystem, the series of timestamp for each packets is
passed as argument to callback of IT context. The timestamp comes from
descriptor of 1394 OHCI IT context and represents the cycle to process
queued packet.
In current implementation of ALSA IEC 61883-1/6 packet streaming engine,
the timestamp comes from calculation with the last packet to generate
the callback, thus it's not per-packet information.
For simplicity, this patchset uses the header to compute the cycle for
packet to be going to be queued. Additionally, this patchset adds some
minor refactoring.
Takashi Sakamoto (4):
ALSA: firewire-lib: use union for directional parameters
ALSA: firewire-lib: add helper function to cancel context inner
callback handler
ALSA: firewire-lib: obsolete macro for header of IT context
ALSA: firewire-lib: use IT context header to compute cycle count for
scheduling packet
sound/firewire/amdtp-am824.c | 2 +-
sound/firewire/amdtp-stream.c | 181 +++++++++++---------
sound/firewire/amdtp-stream.h | 35 ++--
sound/firewire/digi00x/amdtp-dot.c | 2 +-
sound/firewire/fireworks/fireworks_stream.c | 4 +-
sound/firewire/motu/amdtp-motu.c | 2 +-
sound/firewire/tascam/amdtp-tascam.c | 2 +-
7 files changed, 135 insertions(+), 93 deletions(-)
--
2.20.1
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