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void(* AVCodecContext::draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[4], int y, int type, int height)

if non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw an horizontal band. It improve cache usage. Not all codecs can do that. You must check the codec capabilities before

  • encoding: unused
  • decoding: set by user.
    height the height of the slice
    y the y position of the slice
    type 1->top field, 2->bottom field, 3->frame
    offset offset into the AVFrame.data from which the slice should be read

Referenced by ff_draw_horiz_band().

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