In order to measure compression time, you mean the time between jpeg_start_compress() and jpeg_finish_compress, or the time of encode_frame() function?
2011/7/5 Christophe Fergeau <cferg...@redhat.com> > I finally ran some performance test on these changes on a small theora > clip, average compression time goes down from 17,7 ms per frame to 14 ms > per frame which corresponds to a 20% improvement. > > Christophe > > On Tue, Jun 28, 2011 at 01:18:01PM +0200, Christophe Fergeau wrote: > > Hi, > > > > Currently, the mjpeg encoder has to preprocess the images it gets from > > spice-server to make sure the pixel order is the one libjpeg expects > (RGB). > > This means iterating over the whole images swapping pixels since the > input > > images are BGR or BGRX. > > However, libjpeg-turbo, in addition to SIMD optimization to JPEG > decoding, > > also brings additional input colorspaces, including BGR and BGRX. This > patch > > series make use of these new colorspaces in the mjpeg encoder to avoid > > the conversion step. > > libjpeg-turbo use is optional and the code will still do the conversion > > step if libjpeg-turbo wasn't present at compile time. Most of these > patches > > are refactoring, the one introducing the libjpeg-turbo code is the one > > before the last. > > > > Christophe > > > > Christophe Fergeau (9): > > red_worker: remove 2 empty functions > > red_worker: factor pixel conversion code > > mjpeg_encoder: rework output buffer allocation > > red_worker: simplify red_rgb_to_24bpp prototype > > mjpeg_encoder: add mjpeg_encoder_encode_scanline > > mjpeg_encoder: add mjpeg_encoder_get_bytes_per_pixel > > red_worker: use new mjpeg_encoder_encode_scanline API > > mjpeg_encoder: use libjpeg-turbo extra colorspaces > > mjpeg_encoder: remove unused functions > > > > server/mjpeg_encoder.c | 226 > +++++++++++++++++++++++++++++++++++++++++------- > > server/mjpeg_encoder.h | 10 ++- > > server/red_worker.c | 178 +++----------------------------------- > > 3 files changed, 213 insertions(+), 201 deletions(-) > > > > -- > > 1.7.5.4 > > > > _______________________________________________ > > Spice-devel mailing list > > Spice-devel@lists.freedesktop.org > > http://lists.freedesktop.org/mailman/listinfo/spice-devel > > _______________________________________________ > Spice-devel mailing list > Spice-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/spice-devel > >
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