On Mon, 04 May 2015 02:32:05 +0300 Laurent Pinchart <laurent.pinch...@ideasonboard.com> wrote:
> Hi Mikhail, > > Thank you for the patch. Please see below for a (partial) review. > > On Thursday 30 April 2015 00:53:29 Mikhail Ulyanov wrote: > > Here's the the driver for the Renesas R-Car JPEG processing unit > > driver. > > > > The driver is implemented within the V4L2 framework as a mem-to-mem > > device. It presents two video nodes to userspace, one for the > > encoding part, and one for the decoding part. > > > > It was found that the only working mode for encoding is no markers > > output, so we generate it with software. In current version of > > driver we also use software JPEG header parsing because with > > hardware parsing performance is lower then desired. > > Just out of curiosity, what is the performance impact of hardware > parsing ? Looks like feature of IP core. Header parsing complete/continue sequence make it work 1.5-2 times longer, so as i remember maximum performance with 1Mp YUV420 JPEG decoding was ~60 FPS. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
