Summer of Code 2008: Difference between revisions
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This is a draft proposal for Google Summer of Code projects with Xiph.org. | This is a draft proposal for Google Summer of Code projects with Xiph.org. | ||
We need a primary and backup mentor volunteer for | We need a primary and backup mentor volunteer for any project that is to become an official proposal. | ||
=== Optimize Theora encoding/decoding speed, SSE/SSE2 === | === Optimize Theora encoding/decoding speed, SSE/SSE2 === | ||
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trunk. The results must still build cleanly on other archs and do | trunk. The results must still build cleanly on other archs and do | ||
run-time capability detection. | run-time capability detection. | ||
''Mentor: Ralph Giles, backup: Jan Gerber, Mike Smith'' | |||
=== Theora reference encoder quality optimization === | === Theora reference encoder quality optimization === | ||
The libtheora encoder could make more use of some features present in the spec | |||
but not currently implemented in the encoder. | but not currently implemented in the encoder. This is a little open ended, but | ||
suggestions are: quant matrix tuning, per-block qi choice, 4:2:2 and 4:4:4 chroma | |||
support. | |||
''Mentor: Ralph Giles, backup: Timothy Terriberry'' | |||
=== Encode support in theora-exp === | === Encode support in theora-exp === | ||
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encoding mode (e.g., varying lambda), with a default target buffer size | encoding mode (e.g., varying lambda), with a default target buffer size | ||
of approximately 2 seconds. | of approximately 2 seconds. | ||
''Mentor: Timothy "Derf" Terriberry, backup: Mike Smith, Ralph Giles'' | |||
=== Hardware implementation of Theora decoding === | === Hardware implementation of Theora decoding === | ||
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j^ note: in whats state is ogg dirac right now anyway? | j^ note: in whats state is ogg dirac right now anyway? | ||
rillian note: OggDirac is pretty much waiting on schoedinger and a spec revision from Tim at the BBC, but maybe ds would like help. | rillian note: OggDirac is pretty much waiting on schoedinger and a spec revision from Tim at the BBC. I'm not sure this would make a good project, but maybe ds would like help with something. | ||
=== Subtitle Editor === | === Subtitle Editor === | ||
Revision as of 11:56, 21 April 2006
DRAFT
This is a draft proposal for Google Summer of Code projects with Xiph.org.
We need a primary and backup mentor volunteer for any project that is to become an official proposal.
Optimize Theora encoding/decoding speed, SSE/SSE2
Work on MMX, SSE/SSE2 implementations of the crucial encoding and decoding elements in libtheora. This could continue in theora-exp where with ruik's work or consolidate theora-mmx, theora-oil work into trunk. The results must still build cleanly on other archs and do run-time capability detection. Mentor: Ralph Giles, backup: Jan Gerber, Mike Smith
Theora reference encoder quality optimization
The libtheora encoder could make more use of some features present in the spec but not currently implemented in the encoder. This is a little open ended, but suggestions are: quant matrix tuning, per-block qi choice, 4:2:2 and 4:4:4 chroma support. Mentor: Ralph Giles, backup: Timothy Terriberry
Encode support in theora-exp
Implement a rate-distortion optimized encoding mode for theora-exp, including R-D optimzed mode decision and quantization (e.g., constant lambda). Then, use the above routines to implement a medium-latency ABR encoding mode (e.g., varying lambda), with a default target buffer size of approximately 2 seconds. Mentor: Timothy "Derf" Terriberry, backup: Mike Smith, Ralph Giles
Hardware implementation of Theora decoding
Working on a hardware theora decoder, that can be used in embedded devices, dvd players and video pods. Presumedly GPL verilog source to run on an FPGA.
Ogg Dirac mapping and integration in players
this could be a) writing down the spec for ogg dirac that is floating around on the dirac and carid mailing list and implementing it in i.e. vlc or gstreamer.
j^ note: in whats state is ogg dirac right now anyway?
rillian note: OggDirac is pretty much waiting on schoedinger and a spec revision from Tim at the BBC. I'm not sure this would make a good project, but maybe ds would like help with something.
Subtitle Editor
this project would also consolidate the various proposals for subtitles. from what i saw on #annodex, using CMML might be the way to go. Coordinate with Annodex.net.