Yes. Some are internal frame and yuv444 is the output. >-----Original Message----- >From: Yang, Jianwei >Sent: 2011年2月9日 14:31 >To: Wang, Wen W; linux-media@xxxxxxxxxxxxxxx; >umg-meego-handset-kernel@xxxxxxxxxxxxxxxxxxxxxxx >Cc: Jozef Kruger >Subject: RE: Memory allocation in Video4Linux > >Curious for the below, why it is a sum? Will you use all of format at the same time? > >> 1 RAW16: 2*14 = 28MB >> 1 qplane6: 6/4 * 14 = 21MB >> 1 yuv420_16: 2 * 1.5 * 14 = 42MB >> 1 yuv420: 1.5 * 14 = 21MB >> 1 yuv444: 3 * 14 = 42MB >> total: 154MB. > >> -----Original Message----- >> From: umg-meego-handset-kernel-bounces@xxxxxxxxxxxxxxxxxxxxxxx >> [mailto:umg-meego-handset-kernel-bounces@xxxxxxxxxxxxxxxxxxxxxxx] On >> Behalf Of Wang, Wen W >> Sent: Wednesday, February 09, 2011 2:23 PM >> To: linux-media@xxxxxxxxxxxxxxx; umg-meego-handset- >> kernel@xxxxxxxxxxxxxxxxxxxxxxx >> Cc: Jozef Kruger >> Subject: [Umg-meego-handset-kernel] Memory allocation in Video4Linux >> >> Hi, >> >> We are developing the image processor driver for Intel Medfield platform. >> >> We have received some comments on memory management that we should use >> standard Linux kernel interfaces for this, since we are doing everything >> by ourselves including memory allocation (based on pages), page table >> management, virtual address management and etc. >> >> So can you please help give some advice or suggestion on using standard >> kernel interface for memory management? >> >> The processor has a MMU on-chip with same virtual address range as IA. The >> processor will access system memory (read and write) through MMU and page >> table. The memory consumption of the driver could be quite big especially >> for high resolution (14MP) with certain features turned on. >> For example: advanced ISP with XNR and yuv444 output, at 14MP this uses: >> 1 RAW16: 2*14 = 28MB >> 1 qplane6: 6/4 * 14 = 21MB >> 1 yuv420_16: 2 * 1.5 * 14 = 42MB >> 1 yuv420: 1.5 * 14 = 21MB >> 1 yuv444: 3 * 14 = 42MB >> total: 154MB. >> >> Thanks >> Wen >> _______________________________________________ >> Umg-meego-handset-kernel mailing list >> Umg-meego-handset-kernel@xxxxxxxxxxxxxxxxxxxxxxx >> http://umglistsvr.jf.intel.com/mailman/listinfo/umg-meego-handset-kernel ?韬{.n?????%??檩??w?{.n???{炳g???^n?■???h?璀?｛?夸z罐?+€?zf＂?????i?????_璁?:+v??撸?
