OvlK_Wait() fails for iso EP poll rate >1ms

Børge Strand-Bergesen <[email protected]>
Newsgroups gmane.comp.lib.libusb.devel.windows
Message-ID <CAE9Na6EaPSxithoHAg2WTmq-Jcg85PjR2S3YwUus0QLaQygong@mail.gmail.com> 
Hi guys,

I'm working on a USB ASIO driver based on libusbK. It uses an
isochronous IN endpont for a feedback from the Device. Descriptor dump
is attached.

The ASIO driver fails when the IN endpoint's poll rate becomes >1ms.
(See w5.txt line 220.) Rapid polling isn't needed in the application,
and I'd like to make it slower.

Values of 4 and below work as expected in libusbK and mimic what I see
in Linux. 4 gives 1ms polling rate, 3->1/2ms, 2->1/4ms etc. But on
Linux I also have 5->2ms, 6->4ms, 7->8ms, 8->16ms. (Testing on OS X
roughly tracks what I see on Linux, but with fewer transitions. There
may be bugs in the descriptors which cause libusbK and OS X to
misunderstand them in different ways, where Linux seems to be OK.)

What seems to happen is a failure in OvlK_Wait(). When called,
GetLastErrorInternal(); returns 00000057h.

The calling code is line 138 of:
https://github.com/nikkov/Win-Widget/blob/experimental/uaclib/UsbDevice.h

I use the latest libusbK 3.0.7.0 which I downloaded, linked to and
installed today. The built .dll is a 32-bit application. My system is
Win7-64.

One thing I notice is that OvlK_Wait() parameter TransferredLength is
now PUINT. In the ASIO driver code it was PULONG for a while, but I
believe I have fixed that in all of the code now.

I hope you can help me out with this issue. I hope device performance
will be better on weaker computers with slower polling.

Let me know if you need more details about my system.


Thanks,
Børge

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w5.txt (text/plain, 12 KB) 
Information for device Henry Audio USB DAC 128      (VID=0x16D0 PID=0x075D): 

Connection Information:
------------------------------
Connection status: Device connected
Device actual bus speed: High 
Device is hub: No
Device adress: 0x0005
Current configuration value: 0x01
Number of open pipes: 4

Device Descriptor:
------------------------------
0x12	bLength
0x01	bDescriptorType
0x0200	bcdUSB
0xEF	bDeviceClass   (Miscellaneous device)
0x02	bDeviceSubClass   
0x01	bDeviceProtocol   
0x40	bMaxPacketSize0   (64 Bytes)
0x16D0	idVendor
0x075D	idProduct
0x1000	bcdDevice
0x01	iManufacturer   "Audio-Widget"
0x02	iProduct   "Henry Audio USB DAC 128     "
0x03	iSerialNumber   "2014082000BSB"
0x01	bNumConfigurations

Device Qualifier Descriptor:
------------------------------
0x0A	bLength
0x06	bDescriptorType
0x0200	bcdUSB
0xEF	bDeviceClass   (Miscellaneous device)
0x02	bDeviceSubClass   
0x01	bDeviceProtocol   
0x40	bMaxPacketSize0   (64 Bytes)
0x01	bNumConfigurations 
0x00	bReserved 

Configuration Descriptor:
------------------------------
0x09	bLength
0x02	bDescriptorType
0x00C1	wTotalLength
0x04	bNumInterfaces
0x01	bConfigurationValue
0x00	iConfiguration
0x80	bmAttributes   (Bus-powered Device)
0xFA	bMaxPower   (500 mA)

Interface Descriptor:
------------------------------
0x09	bLength
0x04	bDescriptorType
0x00	bInterfaceNumber
0x00	bAlternateSetting
0x00	bNumEndPoints
0x00	bInterfaceClass   
0x00	bInterfaceSubClass   
0x00	bInterfaceProtocol   
0x00	iInterface

Interface Association Descriptor:
------------------------------
0x08	bLength
0x0B	bDescriptorType
0x01	bFirstInterface
0x02	bInterfaceCount
0x01	bFunctionClass   (Audio Device Class)
0x00	bFunctionSubClass   
0x20	bFunctionProtocol   
0x00	iFunction

Interface Descriptor:
------------------------------
0x09	bLength
0x04	bDescriptorType
0x01	bInterfaceNumber
0x00	bAlternateSetting
0x00	bNumEndPoints
0x01	bInterfaceClass   (Audio Device Class)
0x01	bInterfaceSubClass   (Audio Control Interface)
0x20	bInterfaceProtocol   
0x07	iInterface   "Henry Audio USB DAC 128     "

AC Interface Header Descriptor:
------------------------------
0x09	bLength
0x24	bDescriptorType
0x01	bDescriptorSubtype
0x0200	bcdADC
0x04	bCategory
0x0040	wTotalLength
0x00	bmControls

AC Clock Source Descriptor:
------------------------------
0x08	bLength
0x24	bDescriptorType
0x0A	bDescriptorSubtype
0x05	bClockID
0x01	bmAttributes
0x07	bmControls
0x03	bAssocTerminal
0x05	iClockSource   "Clock 2"

AC Input Terminal Descriptor:
------------------------------
0x11	bLength
0x24	bDescriptorType
0x02	bDescriptorSubtype
0x11	bTerminalID
0x0101	wTerminalType   (USB Streaming)
0x00	bAssocTerminal
0x05	bCSourceID
0x02	bNrChannels
0x00000003	bmChannelConfig
0x00	iChannelNames
0x00	bmControls
0x08	iTerminal   "Audio-widget"

AC Feature Unit Descriptor:
------------------------------
0x12	bLength
0x24	bDescriptorType
0x06	bDescriptorSubtype
0x12	bUnitID
0x11	bSourceID
0x00000003	bmaControls(0)
0x00000003	bmaControls(1)
0x00000003	bmaControls(2)
0x00	iFeature

AC Output Terminal Descriptor:
------------------------------
0x0C	bLength
0x24	bDescriptorType
0x03	bDescriptorSubtype
0x13	bTerminalID
0x0302	wTerminalType   (Headphones)
0x00	bAssocTerminal
0x12	bSourceID
0x05	bCSourceID
0x0000	bmControls
0x00	iTerminal

Interface Descriptor:
------------------------------
0x09	bLength
0x04	bDescriptorType
0x02	bInterfaceNumber
0x00	bAlternateSetting
0x00	bNumEndPoints
0x01	bInterfaceClass   (Audio Device Class)
0x02	bInterfaceSubClass   (Audio Streaming Interface)
0x20	bInterfaceProtocol   
0x00	iInterface

Interface Descriptor:
------------------------------
0x09	bLength
0x04	bDescriptorType
0x02	bInterfaceNumber
0x01	bAlternateSetting
0x02	bNumEndPoints
0x01	bInterfaceClass   (Audio Device Class)
0x02	bInterfaceSubClass   (Audio Streaming Interface)
0x20	bInterfaceProtocol   
0x00	iInterface

AS Interface Descriptor:
------------------------------
0x10	bLength
0x24	bDescriptorType
0x01	bDescriptorSubtype
0x11	bTerminalLink
0x07	bmControls
0x01	bFormatType
0x00000001	bmFormats
0x02	bNrChannels
0x00000003	bmChannelConfig
0x00	iChannelNames

AS Format Type 1 Descriptor:
------------------------------
0x06	bLength
0x24	bDescriptorType
0x02	bDescriptorSubtype
0x01	bFormatType
0x04	bSubslotSize
0x18	bBitResolution   (24 Bits/sample)

Endpoint Descriptor:
------------------------------
0x07	bLength
0x05	bDescriptorType
0x02	bEndpointAddress   (OUT Endpoint)
0x05	bmAttributes	(Transfer: Isochronous / Synch: Asynchronous / Usage: Data)
0x0188	wMaxPacketSize   (392 Bytes) 
0x02	bInterval

AS Isochronous Data Endpoint Descriptor:
------------------------------
0x08	bLength
0x25	bDescriptorType
0x01	bDescriptorSubtype
0x00	bmAttributes
0x00	bmControls
0x00	bLockDelayUnits   (Undefined)
0x0000	wLockDelay

Endpoint Descriptor:
------------------------------
0x07	bLength
0x05	bDescriptorType
0x81	bEndpointAddress   (IN Endpoint)
0x11	bmAttributes	(Transfer: Isochronous / Synch: None / Usage: Feedback)
0x0004	wMaxPacketSize   (4 Bytes) 
0x05	bInterval

Interface Descriptor:
------------------------------
0x09	bLength
0x04	bDescriptorType
0x03	bInterfaceNumber
0x00	bAlternateSetting
0x02	bNumEndPoints
0x03	bInterfaceClass   (Human Interface Device Class)
0x00	bInterfaceSubClass   
0x00	bInterfaceProtocol   
0x00	iInterface

HID Descriptor:
------------------------------
0x09	bLength
0x21	bDescriptorType
0x0111	bcdHID
0x00	bCountryCode
0x01	bNumDescriptors
0x22	bDescriptorType   (Report descriptor)
0x0043	bDescriptorLength

Endpoint Descriptor:
------------------------------
0x07	bLength
0x05	bDescriptorType
0x84	bEndpointAddress   (IN Endpoint)
0x03	bmAttributes	(Transfer: Interrupt / Synch: None / Usage: Data)
0x0008	wMaxPacketSize   (8 Bytes) 
0x05	bInterval

Endpoint Descriptor:
------------------------------
0x07	bLength
0x05	bDescriptorType
0x05	bEndpointAddress   (OUT Endpoint)
0x03	bmAttributes	(Transfer: Interrupt / Synch: None / Usage: Data)
0x0008	wMaxPacketSize   (8 Bytes) 
0x05	bInterval

Other Speed Configuration Descriptor:
------------------------------
0x09	bLength
0x07	bDescriptorType
0x00C1	wTotalLength
0x04	bNumInterfaces
0x01	bConfigurationValue
0x00	iConfiguration
0x80	bmAttributes   (Bus-powered Device)
0xFA	bMaxPower   (500 mA)

Interface Descriptor:
------------------------------
0x09	bLength
0x04	bDescriptorType
0x00	bInterfaceNumber
0x00	bAlternateSetting
0x00	bNumEndPoints
0x00	bInterfaceClass   
0x00	bInterfaceSubClass   
0x00	bInterfaceProtocol   
0x00	iInterface

Interface Association Descriptor:
------------------------------
0x08	bLength
0x0B	bDescriptorType
0x01	bFirstInterface
0x02	bInterfaceCount
0x01	bFunctionClass   (Audio Device Class)
0x01	bFunctionSubClass   (Audio Control Interface)
0x20	bFunctionProtocol   
0x07	iFunction   "Henry Audio USB DAC 128     "

Interface Descriptor:
------------------------------
0x09	bLength
0x04	bDescriptorType
0x01	bInterfaceNumber
0x00	bAlternateSetting
0x00	bNumEndPoints
0x01	bInterfaceClass   (Audio Device Class)
0x01	bInterfaceSubClass   (Audio Control Interface)
0x20	bInterfaceProtocol   
0x07	iInterface   "Henry Audio USB DAC 128     "

AC Interface Header Descriptor:
------------------------------
0x09	bLength
0x24	bDescriptorType
0x01	bDescriptorSubtype
0x0200	bcdADC
0x04	bCategory
0x0040	wTotalLength
0x00	bmControls

AC Clock Source Descriptor:
------------------------------
0x08	bLength
0x24	bDescriptorType
0x0A	bDescriptorSubtype
0x05	bClockID
0x01	bmAttributes
0x07	bmControls
0x01	bAssocTerminal
0x00	iClockSource

AC Input Terminal Descriptor:
------------------------------
0x11	bLength
0x24	bDescriptorType
0x02	bDescriptorSubtype
0x11	bTerminalID
0x0101	wTerminalType   (USB Streaming)
0x00	bAssocTerminal
0x05	bCSourceID
0x02	bNrChannels
0x00000003	bmChannelConfig
0x00	iChannelNames
0x00	bmControls
0x00	iTerminal

AC Feature Unit Descriptor:
------------------------------
0x12	bLength
0x24	bDescriptorType
0x06	bDescriptorSubtype
0x12	bUnitID
0x11	bSourceID
0x00000003	bmaControls(0)
0x00000003	bmaControls(1)
0x00000003	bmaControls(2)
0x00	iFeature

AC Output Terminal Descriptor:
------------------------------
0x0C	bLength
0x24	bDescriptorType
0x03	bDescriptorSubtype
0x13	bTerminalID
0x0302	wTerminalType   (Headphones)
0x00	bAssocTerminal
0x12	bSourceID
0x05	bCSourceID
0x0000	bmControls
0x00	iTerminal

Interface Descriptor:
------------------------------
0x09	bLength
0x04	bDescriptorType
0x02	bInterfaceNumber
0x00	bAlternateSetting
0x00	bNumEndPoints
0x01	bInterfaceClass   (Audio Device Class)
0x02	bInterfaceSubClass   (Audio Streaming Interface)
0x20	bInterfaceProtocol   
0x00	iInterface

Interface Descriptor:
------------------------------
0x09	bLength
0x04	bDescriptorType
0x02	bInterfaceNumber
0x01	bAlternateSetting
0x02	bNumEndPoints
0x01	bInterfaceClass   (Audio Device Class)
0x02	bInterfaceSubClass   (Audio Streaming Interface)
0x20	bInterfaceProtocol   
0x00	iInterface

AS Interface Descriptor:
------------------------------
0x10	bLength
0x24	bDescriptorType
0x01	bDescriptorSubtype
0x11	bTerminalLink
0x07	bmControls
0x01	bFormatType
0x00000001	bmFormats
0x02	bNrChannels
0x00000003	bmChannelConfig
0x00	iChannelNames

AS Format Type 1 Descriptor:
------------------------------
0x06	bLength
0x24	bDescriptorType
0x02	bDescriptorSubtype
0x01	bFormatType
0x04	bSubslotSize
0x18	bBitResolution   (24 Bits/sample)

Endpoint Descriptor:
------------------------------
0x07	bLength
0x05	bDescriptorType
0x02	bEndpointAddress   (OUT Endpoint)
0x05	bmAttributes	(Transfer: Isochronous / Synch: Asynchronous / Usage: Data)
0x0188	wMaxPacketSize   (392 Bytes) 
0x01	bInterval

AS Isochronous Data Endpoint Descriptor:
------------------------------
0x08	bLength
0x25	bDescriptorType
0x01	bDescriptorSubtype
0x00	bmAttributes
0x00	bmControls
0x00	bLockDelayUnits   (Undefined)
0x0000	wLockDelay

Endpoint Descriptor:
------------------------------
0x07	bLength
0x05	bDescriptorType
0x81	bEndpointAddress   (IN Endpoint)
0x11	bmAttributes	(Transfer: Isochronous / Synch: None / Usage: Feedback)
0x0004	wMaxPacketSize   (4 Bytes) 
0x01	bInterval

Interface Descriptor:
------------------------------
0x09	bLength
0x04	bDescriptorType
0x03	bInterfaceNumber
0x00	bAlternateSetting
0x02	bNumEndPoints
0x03	bInterfaceClass   (Human Interface Device Class)
0x00	bInterfaceSubClass   
0x00	bInterfaceProtocol   
0x00	iInterface

HID Descriptor:
------------------------------
0x09	bLength
0x21	bDescriptorType
0x0111	bcdHID
0x00	bCountryCode
0x01	bNumDescriptors
0x22	bDescriptorType   (Report descriptor)
0x0043	bDescriptorLength

Endpoint Descriptor:
------------------------------
0x07	bLength
0x05	bDescriptorType
0x84	bEndpointAddress   (IN Endpoint)
0x03	bmAttributes	(Transfer: Interrupt / Synch: None / Usage: Data)
0x0008	wMaxPacketSize   (8 Bytes) 
0x05	bInterval

Endpoint Descriptor:
------------------------------
0x07	bLength
0x05	bDescriptorType
0x05	bEndpointAddress   (OUT Endpoint)
0x03	bmAttributes	(Transfer: Interrupt / Synch: None / Usage: Data)
0x0008	wMaxPacketSize   (8 Bytes) 
0x05	bInterval

String Descriptor Table
--------------------------------
Index  LANGID  String
0x00   0x0000  0x0409 
0x01   0x0409  "Audio-Widget"
0x02   0x0409  "Henry Audio USB DAC 128     "
0x03   0x0409  "2014082000BSB"
0x04   0x0409  "Clock 1"
0x05   0x0409  "Clock 2"
0x06   0x0409  "Select clock"
0x07   0x0409  "Henry Audio USB DAC 128     "
0x08   0x0409  "Audio-widget"
0x09   0x0409  "Audio Out Trm"
0x0A   0x0409  "Widget-Lite"
0x0B   0x0409  "Audio In Alt"

------------------------------

Connection path for device: 
Intel(R) 7 Series/C216 Chipset Family USB Enhanced Host Controller - 1E2D
Root Hub
Generic USB Hub
Henry Audio USB DAC 128      (VID=0x16D0 PID=0x075D)

Brought to you by TDD v1.82.0, Aug 20 2013, 17:17:20
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