• Compression Techniques

  FFmpeg parallel impelmentation

  Posted by Fayaz Ahmed on April 19, 2011 at 3:07 am

  Hi ,
  I am implementing a parallel H264 decoder using openMP as a final semester engineering project. I am concentrating on macroblock level parallelism in which i process macroblocks in a 2-D wave sequence instead of the sequential scan order. But when i do that i get blocks unavaialble for intrap4x4 mode even though those blocks are completely completely decoded. Later I tried sequentially entropy decoding all the blocks in scan order and then use ff_h264_hl_decode_mb in 2-D wave form. Still it gives an intra4x4 mode block unavailable error.
  My question is can ff_h264_decode_mb_cabac be called sequentially for all the macroblocks first before any call to ff_h264_hl_decode_mb.
  As per my understanding ff_h264_decode_mb_cabac is independent for every macroblock and does not depend on any neighboring ones as it is just entropy decoding.Please help me.
  Thanks in advance!

  Fayaz Ahmed replied 15 years, 4 months ago 1 Member · 0 Replies
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