[Haiku-bugs] [Haiku] #4514: Assist video decoding with multiple threads

[dlmcpaul]

#4514: Assist video decoding with multiple threads
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 Reporter:  PieterPanman          |       Owner:  dlmcpaul      
     Type:  enhancement           |      Status:  new           
 Priority:  low                   |   Milestone:  Unscheduled   
Component:  Audio & Video/Codecs  |     Version:  R1/Development
Blockedby:                        |    Platform:  All           
 Blocking:                        |  
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Comment(by dlmcpaul):

 I am not sure that is possible.  each frame in H264 relies on both
 previous and future frames.  If you could break out sets of frames that
 are independant then you could run more than 1 render thread but this
 really has to be done at the decoder level.

 Maybe a decoder could multithread each frame.  You might be able to break
 up a frame into independant elements and process each in a seperate
 thread.

 A couple of questions.
 Do you know if you are using the vesa driver?  ls /dev/graphics should
 show the video driver used.

 If you are.  Drop me a line at dlmcpaul .AT. gmail.com and you can try a
 test ffmpeg version that does the yuv2rgb conversion faster.  It might
 help on h264 video that is borderline for your machine.

-- 
Ticket URL: <http://dev.haiku-os.org/ticket/4514#comment:4>
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