Jordan Petridis 1ef13dda12 pngenc: Allocate a single GstMemory per frame ... Previously, we would create a new GstMemory per write operation and then append them to the GstBuffer. This would cause a reallocation every 16 Memories which is an issue since the png encoder will usually do write in a pattern of 4, 8 and 8k bytes repeating until the frame is done. Instead allocate a single GstMemory and keep writting it into it with a manual index. Much like the jpegenc does. Doing some basic testing With a testsrc snow pattern at 4k and 8k the same pipeline would take ~3.30s to encode a 4k frame and ~23s for an 8k. At 4k 0.70s/33% is taken by memory allocations, while at 8k its ~10.5s/45%. With this patch, at 4k the pipeline takes ~2.40s and at 8k only 9.60s making this 28% and 58% faster accordingly on my laptop, and allocation runtime is dropped to subsecond times. Here's the test pipeline used, increase num-buffers in image freeze to gather more samples. ``` gst-launch-1.0 videotestsrc num-buffers=1 pattern=snow ! imagefreeze num-buffers=1 ! \ video/x-raw,width=7680,height=4320 ! pngenc ! fakesink ``` Close #2717 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4944>		2023-07-05 08:41:14 +00:00
..
gstpng.c
gstpng.h
gstpngdec.c	pngdec: Fix 16bit RGB images display	2023-06-02 05:38:54 +00:00
gstpngdec.h
gstpngenc.c	pngenc: Allocate a single GstMemory per frame	2023-07-05 08:41:14 +00:00
gstpngenc.h	pngenc: Allocate a single GstMemory per frame	2023-07-05 08:41:14 +00:00
meson.build	meson: Call pkgconfig.generate in the loop where we declare plugins dependencies	2022-09-01 21:17:35 +00:00