On Thu, 27 May 2021 14:26:08 +0200, Takashi Sakamoto wrote: > > Hi, > > ALSA IEC 61883-1/6 packet streaming engine have been using pre-computed > parameters ideal for nominal sampling transfer frequency (STF), to > transfer packets to device since it was added 2011. As a result of user > experience for a decade, it is clear that the sequence is not suitable > to some actual devices. > > In design of audio and music unit in IEEE 1394 bus, feedback of > effective sampling transfer frequency is delivered by packets transferred > from device. Reuse of the sequence of parameter in the packets results > in pseudo media clock recovery to transfer packet. > > In this patchset, an option is added to AMDTP domain so that each of > AMDTP stream for outgoing packet has association to AMDTP stream for > incoming packet, to replay the sequence of parameter. Some devices > require receiving packet on-the-fly to transfer packets, so another > option is added. > > These options are just added, not used yet in this time. In future work, > they are going to be used by drivers in ALSA firewire stack. > > Takashi Sakamoto (3): > ALSA: firewire-lib: add replay target to cache sequence of packet > ALSA: firewire-lib: replay sequence of incoming packets for outgoing > packets > ALSA: firewire-lib: transfer rx packets on-the-fly when replaying Applied all three patches now. Thanks. Takashi
