From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=52628 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OMmc7-0004r2-Uf for qemu-devel@nongnu.org; Thu, 10 Jun 2010 14:36:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OMmc6-0003Pu-Tb for qemu-devel@nongnu.org; Thu, 10 Jun 2010 14:36:27 -0400 Received: from sj-iport-4.cisco.com ([171.68.10.86]:59563) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OMmc6-0003PT-OI for qemu-devel@nongnu.org; Thu, 10 Jun 2010 14:36:26 -0400 Message-ID: <4C1130C5.7040903@cisco.com> Date: Thu, 10 Jun 2010 12:36:53 -0600 From: "David S. Ahern" MIME-Version: 1.0 Subject: Re: [Qemu-devel] [RFC PATCH 0/2] Add USB Video Class device emulation. References: <5DF2F2B3-77C9-499E-B357-282EBE5503F1@claunia.com> <4C1128E1.6010900@cisco.com> <1DE120F5-5A68-4D6F-B6D4-10B19448BE22@claunia.com> In-Reply-To: <1DE120F5-5A68-4D6F-B6D4-10B19448BE22@claunia.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Natalia Portillo Cc: qemu-devel Developers On 06/10/10 12:26, Natalia Portillo wrote: > Hi David, > >> Attempting to try out your patches, but it's failing with the following: >> >> usb-uvc: Init called >> usb-uvc: Trying to open /dev/video0 >> .usb-uvc: Device opened correctly. >> usb-uvc: Querying capabilities. >> usb-uvc: Device driver: uvcvideo >> usb-uvc: Device name: Laptop_Integrated_Webcam_0.3M >> usb-uvc: Device bus: usb-0000:00:1a.7-6 >> usb-uvc: Driver version: 0.1.0 >> usb-uvc: Device capabilities: 0x04000001 >> usb-uvc: Enumerating video inputs. >> usb-uvc: Setting video input to index 0 >> usb-uvc: Video input correctly set. >> usb-uvc: Trying to set 320x240 MJPEG. >> qemu-system-x86_64: -device usb-uvc-webcam,device=/dev/video0: Invalid >> format. > > As for now only cameras that allow MJPEG format will work. > Check your camera specifications (lsusb -v works if your real camera is UVC, check driver's source otherwise). > Cameras with RAW frames (YUYV and NV12 formats) do not work, yet. I'm on it. Trying to guess the relevant descriptors: VideoStreaming Interface Descriptor: bLength 50 bDescriptorType 36 bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) bFrameIndex 3 bmCapabilities 0x00 Still image unsupported wWidth 320 wHeight 240 dwMinBitRate 768000 dwMaxBitRate 4608000 dwMaxVideoFrameBufferSize 153600 dwDefaultFrameInterval 333333 bFrameIntervalType 6 dwFrameInterval( 0) 333333 dwFrameInterval( 1) 400000 dwFrameInterval( 2) 500000 dwFrameInterval( 3) 666666 dwFrameInterval( 4) 1000000 dwFrameInterval( 5) 2000000 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)) > >> >> Also, I tried a PWC camera which is not a V4L2_INPUT_TYPE_CAMERA and >> noticed that video_input_index is used uninitialized in usb_uvc_initfn > It's a webcam? > Could you give me more information? > Manufacturer, model, linux's module name. usb 7-1: new full speed USB device using uhci_hcd and address 3 usb 7-1: New USB device found, idVendor=046d, idProduct=08b6 usb 7-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 pwc: Logitech/Cisco VT Camera webcam detected. David > > All webcams SHOULD (and MUST) implement V4L2_INPUT_TYPE_CAMERA. > Not the same for video cameras or capture devices (PAL/NTSC, DVB/ATSC). > > Regards, > Natalia Portillo