* uvcvideo: Trying to lower the URB buffers on eMPIA minicam
@ 2013-04-24 22:47 Pierre ANTOINE
2013-04-25 11:36 ` Laurent Pinchart
0 siblings, 1 reply; 7+ messages in thread
From: Pierre ANTOINE @ 2013-04-24 22:47 UTC (permalink / raw)
To: linux-media
Hello guys,
My nickname is Nunux, I'm a geek, and need some help ...
I just buy ten minicam to do a poker TV table.
The minicam are eMPIA: eb1a:299f
I've a PC with 1 internal USB BUS 2.0 and 3 PCI extension cards USB BUS 2.0
Currently, I can have only one cam eMPIA working per USB BUS but no more
even if I set the lower resolution of 160x120.
[ 2768.783291] uvcvideo: Device requested 1024 B/frame bandwidth.
[ 2768.783295] uvcvideo: Selecting alternate setting 4 (2736 B/frame bandwidth).
[ 2768.783641] uvcvideo: Allocated 5 URB buffers of 15x2736 bytes each.
[ 2768.783664] uvcvideo: Failed to submit URB 0 (-28).
So I can have 4 minicam at a time, but need 10.
I'm running Linux 3.5.0 on Ubuntu.
pierre@SuperTable:/usr/src/linux-source-3.5.0/linux-source-3.5.0/drivers/media/video/uvc$
uvcdynctrl -f -d /dev/video0
Listing available frame formats for device /dev/video0:
Pixel format: YUYV (YUV 4:2:2 (YUYV); MIME type: video/x-raw-yuv)
Frame size: 640x480
Frame rates: 30
Frame size: 160x120
Frame rates: 30
Frame size: 176x144
Frame rates: 30
Frame size: 320x240
Frame rates: 30
Frame size: 352x288
Frame rates: 30
Frame size: 640x480
Frame rates: 30
I try to patch uvc_video.c like this:
/* Isochronous endpoint, select the alternate setting. */
//bandwidth = stream->ctrl.dwMaxPayloadTransferSize;
bandwidth = 1024;
That help me to reduce the USB bandwidth down to 1024 on a Microsoft LifeCam
Cinema:
[ 944.410066] USB Video Class driver (1.1.1)
[ 948.636665] uvcvideo: Device requested 1024 B/frame bandwidth.
[ 948.636670] uvcvideo: Selecting alternate setting 4 (1024 B/frame bandwidth).
[ 948.912793] uvcvideo: Allocated 5 URB buffers of 32x1024 bytes each.
And allow me to run up to 3 Microsoft LifeCam Cinema on the same PCI USB Card.
But it's not working on eMPIA minicam:
[ 982.488896] uvcvideo: Device requested 1024 B/frame bandwidth.
[ 982.488901] uvcvideo: Selecting alternate setting 4 (2736 B/frame bandwidth).
[ 982.489355] uvcvideo: Allocated 5 URB buffers of 32x2736 bytes each.
Because even if the request bandwdith is fixed to 1024, there is no endpoint
with such lower bandwidth.
--------------
So my question is, is it possible to lower the bandwidth of the endpoint,
or use a different bandwidth, or the do anything to run 3 cams per usb ports ?
I host a mini poker mtt for my wife birthday this saturday, and hope get some
thing to work before...
So any help or comments would be really appreciated,
Many regards,
Nunux
------------------------------------------------
Bus 004 Device 002: ID eb1a:299f eMPIA Technology, Inc.
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0xeb1a eMPIA Technology, Inc.
idProduct 0x299f
bcdDevice 0.05
iManufacturer 1
iProduct 2
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 441
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 14 Video
bFunctionSubClass 3 Video Interface Collection
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 1 Video Control
bInterfaceProtocol 0
iInterface 0
VideoControl Interface Descriptor:
bLength 13
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdUVC 1.00
wTotalLength 77
dwClockFrequency 30.000000MHz
bInCollection 1
baInterfaceNr( 0) 1
VideoControl Interface Descriptor:
bLength 18
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0201 Camera Sensor
bAssocTerminal 0
iTerminal 0
wObjectiveFocalLengthMin 0
wObjectiveFocalLengthMax 0
wOcularFocalLength 0
bControlSize 3
bmControls 0x00000004
Auto-Exposure Priority
VideoControl Interface Descriptor:
bLength 26
bDescriptorType 36
bDescriptorSubtype 6 (EXTENSION_UNIT)
bUnitID 2
guidExtensionCode {92423946-d10c-e34a-8783-3133f9eaaa3b}
bNumControl 3
bNrPins 1
baSourceID( 0) 1
bControlSize 1
bmControls( 0) 0xff
iExtension 0
VideoControl Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 5 (PROCESSING_UNIT)
Warning: Descriptor too short
bUnitID 3
bSourceID 2
wMaxMultiplier 0
bControlSize 2
bmControls 0x0000157f
Brightness
Contrast
Hue
Saturation
Sharpness
Gamma
White Balance Temperature
Backlight Compensation
Power Line Frequency
White Balance Temperature, Auto
iProcessing 0
bmVideoStandards 0x 9
None
SECAM - 625/50
VideoControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 4
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 3
iTerminal 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 16
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
VideoStreaming Interface Descriptor:
bLength 14
bDescriptorType 36
bDescriptorSubtype 1 (INPUT_HEADER)
bNumFormats 1
wTotalLength 253
bEndPointAddress 129
bmInfo 0
bTerminalLink 4
bStillCaptureMethod 2
bTriggerSupport 0
bTriggerUsage 0
bControlSize 1
bmaControls( 0) 27
VideoStreaming Interface Descriptor:
bLength 27
bDescriptorType 36
bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED)
bFormatIndex 1
bNumFrameDescriptors 6
guidFormat
{59555932-0000-1000-8000-00aa00389b71}
bBitsPerPixel 16
bDefaultFrameIndex 1
bAspectRatioX 0
bAspectRatioY 0
bmInterlaceFlags 0x00
Interlaced stream or variable: No
Fields per frame: 2 fields
Field 1 first: No
Field pattern: Field 1 only
bCopyProtect 0
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 1
bmCapabilities 0x00
Still image unsupported
wWidth 640
wHeight 480
dwMinBitRate 147456000
dwMaxBitRate 147456000
dwMaxVideoFrameBufferSize 614400
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 2
bmCapabilities 0x00
Still image unsupported
wWidth 160
wHeight 120
dwMinBitRate 9216000
dwMaxBitRate 9216000
dwMaxVideoFrameBufferSize 38400
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 3
bmCapabilities 0x00
Still image unsupported
wWidth 176
wHeight 144
dwMinBitRate 12165120
dwMaxBitRate 12165120
dwMaxVideoFrameBufferSize 50688
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 4
bmCapabilities 0x00
Still image unsupported
wWidth 320
wHeight 240
dwMinBitRate 36864000
dwMaxBitRate 36864000
dwMaxVideoFrameBufferSize 153600
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 5
bmCapabilities 0x00
Still image unsupported
wWidth 352
wHeight 288
dwMinBitRate 48660480
dwMaxBitRate 48660480
dwMaxVideoFrameBufferSize 202752
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 6
bmCapabilities 0x00
Still image unsupported
wWidth 640
wHeight 480
dwMinBitRate 147456000
dwMaxBitRate 147456000
dwMaxVideoFrameBufferSize 614400
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 26
bDescriptorType 36
bDescriptorSubtype 3 (STILL_IMAGE_FRAME)
bEndpointAddress 0
bNumImageSizePatterns 5
wWidth( 0) 640
wHeight( 0) 480
wWidth( 1) 352
wHeight( 1) 288
wWidth( 2) 320
wHeight( 2) 240
wWidth( 3) 176
wHeight( 3) 144
wWidth( 4) 160
wHeight( 4) 120
bNumCompressionPatterns 5
VideoStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 13 (COLORFORMAT)
bColorPrimaries 1 (BT.709,sRGB)
bTransferCharacteristics 1 (BT.709)
bMatrixCoefficients 4 (SMPTE 170M (BT.601))
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x1400 3x 1024 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x13d0 3x 976 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 3
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x13b0 3x 944 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 4
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x1390 3x 912 bytes
bInterval 1
--
--------------------------------------
ANTOINE Pierre
nunux@free.fr
--------------------------------------
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: uvcvideo: Trying to lower the URB buffers on eMPIA minicam
2013-04-24 22:47 uvcvideo: Trying to lower the URB buffers on eMPIA minicam Pierre ANTOINE
@ 2013-04-25 11:36 ` Laurent Pinchart
2013-04-25 19:13 ` Pierre ANTOINE
0 siblings, 1 reply; 7+ messages in thread
From: Laurent Pinchart @ 2013-04-25 11:36 UTC (permalink / raw)
To: Pierre ANTOINE; +Cc: linux-media
Hi Pierre,
On Thursday 25 April 2013 00:47:53 Pierre ANTOINE wrote:
> Hello guys,
>
> My nickname is Nunux, I'm a geek, and need some help ...
>
> I just buy ten minicam to do a poker TV table.
> The minicam are eMPIA: eb1a:299f
>
> I've a PC with 1 internal USB BUS 2.0 and 3 PCI extension cards USB BUS 2.0
>
> Currently, I can have only one cam eMPIA working per USB BUS but no more
> even if I set the lower resolution of 160x120.
>
> [ 2768.783291] uvcvideo: Device requested 1024 B/frame bandwidth.
> [ 2768.783295] uvcvideo: Selecting alternate setting 4 (2736 B/frame
> bandwidth). [ 2768.783641] uvcvideo: Allocated 5 URB buffers of 15x2736
> bytes each. [ 2768.783664] uvcvideo: Failed to submit URB 0 (-28).
>
> So I can have 4 minicam at a time, but need 10.
>
> I'm running Linux 3.5.0 on Ubuntu.
>
> pierre@SuperTable:/usr/src/linux-source-3.5.0/linux-source-3.5.0/drivers/med
> ia/video/uvc$ uvcdynctrl -f -d /dev/video0
> Listing available frame formats for device /dev/video0:
> Pixel format: YUYV (YUV 4:2:2 (YUYV); MIME type: video/x-raw-yuv)
> Frame size: 640x480
> Frame rates: 30
> Frame size: 160x120
> Frame rates: 30
> Frame size: 176x144
> Frame rates: 30
> Frame size: 320x240
> Frame rates: 30
> Frame size: 352x288
> Frame rates: 30
> Frame size: 640x480
> Frame rates: 30
>
> I try to patch uvc_video.c like this:
> /* Isochronous endpoint, select the alternate setting. */
> //bandwidth = stream->ctrl.dwMaxPayloadTransferSize;
> bandwidth = 1024;
>
>
> That help me to reduce the USB bandwidth down to 1024 on a Microsoft LifeCam
> Cinema:
>
> [ 944.410066] USB Video Class driver (1.1.1)
> [ 948.636665] uvcvideo: Device requested 1024 B/frame bandwidth.
> [ 948.636670] uvcvideo: Selecting alternate setting 4 (1024 B/frame
> bandwidth). [ 948.912793] uvcvideo: Allocated 5 URB buffers of 32x1024
> bytes each.
>
> And allow me to run up to 3 Microsoft LifeCam Cinema on the same PCI USB
> Card.
>
> But it's not working on eMPIA minicam:
>
> [ 982.488896] uvcvideo: Device requested 1024 B/frame bandwidth.
> [ 982.488901] uvcvideo: Selecting alternate setting 4 (2736 B/frame
> bandwidth). [ 982.489355] uvcvideo: Allocated 5 URB buffers of 32x2736
> bytes each.
>
> Because even if the request bandwdith is fixed to 1024, there is no endpoint
> with such lower bandwidth.
>
> --------------
>
> So my question is, is it possible to lower the bandwidth of the endpoint,
> or use a different bandwidth, or the do anything to run 3 cams per usb ports
> ?
That largely depends on the device. Even when not requiring the full bandwidth
on average, devices might send data in bursts (memory is expensive), in which
case you will need to allocate an average bandwidth larger than or equal to
the peak bandwidth (that's how USB works). However, your device might not need
the high bandwidth it reports in its endpoint descriptors. There's no way to
tell short of trying.
As a quick hack it's probably possible to patch the USB core to lower the
endpoint bandwidth in the endpoint USB descriptors for that device. That's
pretty dirty, but will at least let you find out whether your device can work
at lower bandwidth.
> I host a mini poker mtt for my wife birthday this saturday, and hope get
> some thing to work before...
>
> So any help or comments would be really appreciated,
Just for my records, could you please repost the 'lsusb -v -d eb1a:299f'
output running as root ? The string descriptors are not displayed otherwise.
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: uvcvideo: Trying to lower the URB buffers on eMPIA minicam
2013-04-25 11:36 ` Laurent Pinchart
@ 2013-04-25 19:13 ` Pierre ANTOINE
2013-04-25 22:55 ` Laurent Pinchart
0 siblings, 1 reply; 7+ messages in thread
From: Pierre ANTOINE @ 2013-04-25 19:13 UTC (permalink / raw)
To: Laurent Pinchart; +Cc: Pierre ANTOINE, linux-media
Selon Laurent Pinchart <laurent.pinchart@ideasonboard.com>:
>
> Just for my records, could you please repost the 'lsusb -v -d eb1a:299f'
> output running as root ? The string descriptors are not displayed otherwise.
>
> --
> Regards,
>
> Laurent Pinchart
>
> --
Hi Laurent,
Please find the requested informations as root.
Where do you think I can try to hack the bandwidth size ?
Something like: source/drivers/usb/core/config.c usb_parse_endpoint() ?
Many regards,
Pierre
-----------------------
pierre@SuperTable:~$ sudo lsusb -v -d eb1a:299f
[sudo] password for pierre:
Bus 004 Device 002: ID eb1a:299f eMPIA Technology, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0xeb1a eMPIA Technology, Inc.
idProduct 0x299f
bcdDevice 0.05
iManufacturer 1 Image Processor
iProduct 2 USB 2.0 PC Cam
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 441
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 14 Video
bFunctionSubClass 3 Video Interface Collection
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 1 Video Control
bInterfaceProtocol 0
iInterface 0
VideoControl Interface Descriptor:
bLength 13
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdUVC 1.00
wTotalLength 77
dwClockFrequency 30.000000MHz
bInCollection 1
baInterfaceNr( 0) 1
VideoControl Interface Descriptor:
bLength 18
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0201 Camera Sensor
bAssocTerminal 0
iTerminal 0
wObjectiveFocalLengthMin 0
wObjectiveFocalLengthMax 0
wOcularFocalLength 0
bControlSize 3
bmControls 0x00000004
Auto-Exposure Priority
VideoControl Interface Descriptor:
bLength 26
bDescriptorType 36
bDescriptorSubtype 6 (EXTENSION_UNIT)
bUnitID 2
guidExtensionCode {92423946-d10c-e34a-8783-3133f9eaaa3b}
bNumControl 3
bNrPins 1
baSourceID( 0) 1
bControlSize 1
bmControls( 0) 0xff
iExtension 0
VideoControl Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 5 (PROCESSING_UNIT)
Warning: Descriptor too short
bUnitID 3
bSourceID 2
wMaxMultiplier 0
bControlSize 2
bmControls 0x0000157f
Brightness
Contrast
Hue
Saturation
Sharpness
Gamma
White Balance Temperature
Backlight Compensation
Power Line Frequency
White Balance Temperature, Auto
iProcessing 0
bmVideoStandards 0x 9
None
SECAM - 625/50
VideoControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 4
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 3
iTerminal 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 16
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
VideoStreaming Interface Descriptor:
bLength 14
bDescriptorType 36
bDescriptorSubtype 1 (INPUT_HEADER)
bNumFormats 1
wTotalLength 253
bEndPointAddress 129
bmInfo 0
bTerminalLink 4
bStillCaptureMethod 2
bTriggerSupport 0
bTriggerUsage 0
bControlSize 1
bmaControls( 0) 27
VideoStreaming Interface Descriptor:
bLength 27
bDescriptorType 36
bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED)
bFormatIndex 1
bNumFrameDescriptors 6
guidFormat
{59555932-0000-1000-8000-00aa00389b71}
bBitsPerPixel 16
bDefaultFrameIndex 1
bAspectRatioX 0
bAspectRatioY 0
bmInterlaceFlags 0x00
Interlaced stream or variable: No
Fields per frame: 2 fields
Field 1 first: No
Field pattern: Field 1 only
bCopyProtect 0
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 1
bmCapabilities 0x00
Still image unsupported
wWidth 640
wHeight 480
dwMinBitRate 147456000
dwMaxBitRate 147456000
dwMaxVideoFrameBufferSize 614400
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 2
bmCapabilities 0x00
Still image unsupported
wWidth 160
wHeight 120
dwMinBitRate 9216000
dwMaxBitRate 9216000
dwMaxVideoFrameBufferSize 38400
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 3
bmCapabilities 0x00
Still image unsupported
wWidth 176
wHeight 144
dwMinBitRate 12165120
dwMaxBitRate 12165120
dwMaxVideoFrameBufferSize 50688
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 4
bmCapabilities 0x00
Still image unsupported
wWidth 320
wHeight 240
dwMinBitRate 36864000
dwMaxBitRate 36864000
dwMaxVideoFrameBufferSize 153600
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 5
bmCapabilities 0x00
Still image unsupported
wWidth 352
wHeight 288
dwMinBitRate 48660480
dwMaxBitRate 48660480
dwMaxVideoFrameBufferSize 202752
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 6
bmCapabilities 0x00
Still image unsupported
wWidth 640
wHeight 480
dwMinBitRate 147456000
dwMaxBitRate 147456000
dwMaxVideoFrameBufferSize 614400
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 26
bDescriptorType 36
bDescriptorSubtype 3 (STILL_IMAGE_FRAME)
bEndpointAddress 0
bNumImageSizePatterns 5
wWidth( 0) 640
wHeight( 0) 480
wWidth( 1) 352
wHeight( 1) 288
wWidth( 2) 320
wHeight( 2) 240
wWidth( 3) 176
wHeight( 3) 144
wWidth( 4) 160
wHeight( 4) 120
bNumCompressionPatterns 5
VideoStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 13 (COLORFORMAT)
bColorPrimaries 1 (BT.709,sRGB)
bTransferCharacteristics 1 (BT.709)
bMatrixCoefficients 4 (SMPTE 170M (BT.601))
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x1400 3x 1024 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x13d0 3x 976 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 3
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x13b0 3x 944 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 4
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x1390 3x 912 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
pierre@SuperTable:~$
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: uvcvideo: Trying to lower the URB buffers on eMPIA minicam
2013-04-25 19:13 ` Pierre ANTOINE
@ 2013-04-25 22:55 ` Laurent Pinchart
2013-04-26 0:03 ` Pierre ANTOINE
0 siblings, 1 reply; 7+ messages in thread
From: Laurent Pinchart @ 2013-04-25 22:55 UTC (permalink / raw)
To: Pierre ANTOINE; +Cc: linux-media
Hi Pierre,
On Thursday 25 April 2013 21:13:48 Pierre ANTOINE wrote:
> Selon Laurent Pinchart <laurent.pinchart@ideasonboard.com>:
> > Just for my records, could you please repost the 'lsusb -v -d eb1a:299f'
> > output running as root ? The string descriptors are not displayed
> > otherwise.
>
> Hi Laurent,
>
> Please find the requested informations as root.
Thank you. I'll update the supported devices list on the uvcvideo website.
Could you please give me the exact model name of the camera ?
> Where do you think I can try to hack the bandwidth size ?
>
> Something like: source/drivers/usb/core/config.c usb_parse_endpoint() ?
Yes, that looks good. Just make sure you only hack the endpoint bandwidth for
the webcam and not for the other USB devices.
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: uvcvideo: Trying to lower the URB buffers on eMPIA minicam
2013-04-25 22:55 ` Laurent Pinchart
@ 2013-04-26 0:03 ` Pierre ANTOINE
2013-04-26 0:41 ` Laurent Pinchart
0 siblings, 1 reply; 7+ messages in thread
From: Pierre ANTOINE @ 2013-04-26 0:03 UTC (permalink / raw)
To: Laurent Pinchart; +Cc: Pierre ANTOINE, linux-media
Selon Laurent Pinchart <laurent.pinchart@ideasonboard.com>:
> Thank you. I'll update the supported devices list on the uvcvideo website.
> Could you please give me the exact model name of the camera ?
The product description is here:
http://www.amazon.fr/dp/B00A487TPC/ref=pe_205631_30430471_3p_M3_dp_1
That is: Supereyes from XCSource know on Amazon as Microscope USB Cam.
>
> Yes, that looks good. Just make sure you only hack the endpoint bandwidth for
> the webcam and not for the other USB devices.
>
I'm trying this one:
---------------------------------------
if (to_usb_device(ddev)->speed == USB_SPEED_HIGH)
{
unsigned maxp;
maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff;
if (maxp == 912) endpoint->desc.wMaxPacketSize =
cpu_to_le16(256);
dev_warn(ddev, "Hack 912 to 256 downsize endpoint by Nunux");
}
---------------------------------------
That seem to trigger ... but not working ... and not showing is lsusb ...
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: uvcvideo: Trying to lower the URB buffers on eMPIA minicam
2013-04-26 0:03 ` Pierre ANTOINE
@ 2013-04-26 0:41 ` Laurent Pinchart
2013-04-26 0:56 ` Pierre ANTOINE
0 siblings, 1 reply; 7+ messages in thread
From: Laurent Pinchart @ 2013-04-26 0:41 UTC (permalink / raw)
To: Pierre ANTOINE; +Cc: linux-media
Hi Pierre,
On Friday 26 April 2013 02:03:49 Pierre ANTOINE wrote:
> Selon Laurent Pinchart <laurent.pinchart@ideasonboard.com>:
> > Thank you. I'll update the supported devices list on the uvcvideo website.
> > Could you please give me the exact model name of the camera ?
>
> The product description is here:
>
> http://www.amazon.fr/dp/B00A487TPC/ref=pe_205631_30430471_3p_M3_dp_1
>
> That is: Supereyes from XCSource know on Amazon as Microscope USB Cam.
Thank you.
> > Yes, that looks good. Just make sure you only hack the endpoint bandwidth
> > for the webcam and not for the other USB devices.
>
> I'm trying this one:
>
> ---------------------------------------
> if (to_usb_device(ddev)->speed == USB_SPEED_HIGH)
> {
> unsigned maxp;
>
> maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff;
> if (maxp == 912) endpoint->desc.wMaxPacketSize =
> cpu_to_le16(256);
> dev_warn(ddev, "Hack 912 to 256 downsize endpoint by
> Nunux"); }
> ---------------------------------------
>
> That seem to trigger ... but not working ... and not showing is lsusb ...
lsusb parses the raw descriptors. Could you print the wMaxPacketSize value for
all the endpoints in the uvcvideo driver ? The value is also exported through
a sysfs attribute.
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: uvcvideo: Trying to lower the URB buffers on eMPIA minicam
2013-04-26 0:41 ` Laurent Pinchart
@ 2013-04-26 0:56 ` Pierre ANTOINE
0 siblings, 0 replies; 7+ messages in thread
From: Pierre ANTOINE @ 2013-04-26 0:56 UTC (permalink / raw)
To: Laurent Pinchart; +Cc: linux-media
Laurent,
I finally did it !
On usbcore, I correct the bandwidth of endpoint 4 from 912 to 1024.
maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff;
if (maxp == 912) endpoint->desc.wMaxPacketSize = cpu_to_le16(1024);
On uvcvideo:
I set: 768 B/frame bandwidth
I use endpoint alt-setting 4 by disabling some checking code.
And I get uvcvideo: Allocated 5 URB buffers of 32x1024 bytes each.
So I can run the 4 cam on the same USB card:
gst-launch v4l2src device=/dev/video0 !
'video/x-raw-yuv,width=160,height=120,framerate=30/1' ! xvimagesink
gst-launch v4l2src device=/dev/video1 !
'video/x-raw-yuv,width=160,height=120,framerate=30/1' ! xvimagesink
gst-launch v4l2src device=/dev/video2 !
'video/x-raw-yuv,width=160,height=120,framerate=30/1' ! xvimagesink
gst-launch v4l2src device=/dev/video3 !
'video/x-raw-yuv,width=160,height=120,framerate=30/1' ! xvimagesink
I will try to do it less dirty next week ...
Thank's a lot for pointing me on usbcore ...
Many regards,
Pierre
Selon Laurent Pinchart <laurent.pinchart@ideasonboard.com>:
> lsusb parses the raw descriptors. Could you print the wMaxPacketSize value
> for all the endpoints in the uvcvideo driver ? The value is also exported
through
> a sysfs attribute.
>
> --
> Regards,
>
> Laurent Pinchart
>
>
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2013-04-26 0:56 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
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2013-04-24 22:47 uvcvideo: Trying to lower the URB buffers on eMPIA minicam Pierre ANTOINE
2013-04-25 11:36 ` Laurent Pinchart
2013-04-25 19:13 ` Pierre ANTOINE
2013-04-25 22:55 ` Laurent Pinchart
2013-04-26 0:03 ` Pierre ANTOINE
2013-04-26 0:41 ` Laurent Pinchart
2013-04-26 0:56 ` Pierre ANTOINE
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