fw_iso_context_create
context = fw_iso_context_create(client->device->card, a->type, a->channel, a->speed,
context = fw_iso_context_create(dev->card, FW_ISO_CONTEXT_RECEIVE,
ctx->context = fw_iso_context_create(device->card,
isight->context = fw_iso_context_create(isight->device->card,