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Name: GPU Accelerated JPEG Rendering
--client lca --show lca2017 --room tasman_bc 12154 --force
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Author(s):	Nathan Egge
Location	Tasman Hall B/C
Date	jan Wed 18	Days Raw Files
Start	22:40	First Raw Start	22:28
Duration	0:45:0	Offset	0:11:21
End	23:25	Last Raw End	23:28
Chapters	00:00 0:18:32
Total cuts_time	44 min.

http://linux.conf.au/schedule/presentation/38/
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assets release.pdf GPU_Accelerated_JPEG_Rendering.json
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Description:	GPU Accelerated JPEG Rendering JPEG is the de facto standard for natural image compression on the web. Most web browsers use the open source libjpeg-turbo for decoding JPEG files because a) it is libre software and b) there has been significant investment in SIMD optimization. However, in applications where the resulting image is immediately uploaded to the GPU for compositing (like in modern web browsers) this approach has two drawbacks: 1. The full uncompressed image must be uploaded to the GPU 2. Time spent decoding on the CPU robs computation from other tasks These issues are exacerbated as more content is provided in high definition. The jpeg_gpu project aims to solve both these problems by shifting the decode computation as early as possible to the GPU. Partially decoded JPEG data is uploaded as soon as the entropy coded symbols are read, and a set of pre-defined shaders complete the rest of the decode into a GPU texture. Depending on the resolution of the image and how much it is compressed, the speed-up can be significant. This talk will cover how the jpeg_gpu library is designed to take maximum advantage of GPU parallelism. I will include a brief discussion of some trade-offs made when designing the shader routines based on experimentation. The real world performance of this approach will be discussed based on the integration of jpeg_gpu into the WebRenderer compositing engine in Servo. markdown
Comment:	production notes

recording sheet

recording sheet

2017-01-19/15_28_39.ts Apply: 22:28:39 - 22:38:36 ( 00:09:57 ) S: 22:28:39 - E: 22:58:39 D: 00:30:00 (End: 597.0) show more...

vlc ~/Videos/veyepar/lca/lca2017/dv/tasman_bc/2017-01-19/15_28_39.ts :start-time=00.0 --audio-desync=0

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	22:28:39		seconds: 0.0 Wall: 22:28:39
Duration	00:30:00
	22:58:39		seconds: 597.0 Wall: 22:38:36
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2017-01-19/15_28_39.ts Apply: 22:38:36 - 22:40:07 ( 00:01:31 ) S: 22:28:39 - E: 22:58:39 D: 00:30:00 (Start: 597.0) (End: 688.0) show more...

vlc ~/Videos/veyepar/lca/lca2017/dv/tasman_bc/2017-01-19/15_28_39.ts :start-time=0597.0 --audio-desync=0

	Raw File	Cut List
	22:28:39		seconds: 597.0 Wall: 22:38:36
Duration	00:30:00
	22:58:39		seconds: 688.0 Wall: 22:40:07
Comments:
mp4 mp4.m3u	dv.m3u	Split: Sequence:: delete

audio viz

2017-01-19/15_28_39.ts Apply: 22:40:07 - 22:58:39 ( 00:18:32 ) S: 22:28:39 - E: 22:58:39 D: 00:30:00 (Start: 688.0) show more...

vlc ~/Videos/veyepar/lca/lca2017/dv/tasman_bc/2017-01-19/15_28_39.ts :start-time=0688.0 --audio-desync=0

	Raw File	Cut List
	22:28:39		seconds: 688.0 Wall: 22:40:07
Duration	00:30:00
	22:58:39		seconds: 0.0 Wall: 22:28:39
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mp4 mp4.m3u	dv.m3u	Split: Sequence:: delete

audio viz

2017-01-19/15_58_39.ts Apply: 22:58:39 - 23:24:42 ( 00:26:03 ) S: 22:58:39 - E: 23:28:38 D: 00:29:59 (End: 1563.0) show more...

vlc ~/Videos/veyepar/lca/lca2017/dv/tasman_bc/2017-01-19/15_58_39.ts :start-time=00.0 --audio-desync=0

	Raw File	Cut List
	22:58:39		seconds: 0.0 Wall: 22:58:39
Duration	00:29:59
	23:28:38		seconds: 1563.0 Wall: 23:24:42
Comments:
mp4 mp4.m3u	dv.m3u	Split: Sequence:: delete

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2017-01-19/15_58_39.ts Apply: 23:24:42 - 23:28:38 ( 00:03:56 ) S: 22:58:39 - E: 23:28:38 D: 00:29:59 (Start: 1563.0) show more...

vlc ~/Videos/veyepar/lca/lca2017/dv/tasman_bc/2017-01-19/15_58_39.ts :start-time=01563.0 --audio-desync=0

	Raw File	Cut List
	22:58:39		seconds: 1563.0 Wall: 23:24:42
Duration	00:29:59
	23:28:38		seconds: 0.0 Wall: 22:58:39
Comments:
mp4 mp4.m3u	dv.m3u	Split: Sequence:: delete

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2017-01-19/15_28_39.ts
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2017-01-19/15_58_39.ts
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