On Tue, 18 May 2021 15:00:39 +0200, Takashi Sakamoto wrote: > > Hi, > > Current implementation of ALSA IEC 61883-1/6 packet streaming engine > doesn't check whether received packets are exactly per isochronous > cycle. This is required to process packets transferred from > OXFW970-based devices and devices in RME Fireface series. However, the > packet sequence with skipped cycle is inconvenient for media clock > recovery. > > This patchset takes the engine to check cycle continuity at processing > packets, including code refactoring. For RME Fireface series, the skipped > cycle is handled as receiving an empty packet. For OXFW970-based devices, > the skipped cycles are acceptable but media clock recovery is hard. > > Takashi Sakamoto (8): > ALSA: firewire-lib: code refactoring to refer the same frame count per > period in domain structure > ALSA: firewire-lib: handle the case that empty isochronous packet > payload for CIP > ALSA: firewire-lib: code refactoring for sequence descriptor' > ALSA: firewire-lib: code refactoring for helper function to compute > OHCI 1394 cycle > ALSA: firewire-lib: code refactoring for parser of IR context header > ALSA: firewire-lib: code refactoring for check of CIP header about > payload size > ALSA: firewire-lib: check cycle continuity > ALSA: firewire-lib: insert descriptor for skipped cycle Applied all eight patches now. Thanks. Takashi
