Revision a6ddf8bf libavfilter/vf_crop.c

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libavfilter/vf_crop.c
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#include "avfilter.h"


  		




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#include "libavutil/pixdesc.h"


  		




  
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#include "libavcore/imgutils.h"


  		




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typedef struct {


  		




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    int  x;             ///< x offset of the non-cropped area with respect to the input area


  		




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    AVFilterContext *ctx = link->dst;


  		




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    CropContext *crop = ctx->priv;


  		




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    const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[link->format];


  		




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    int i;


  		




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    memset(crop->max_step, 0, sizeof(crop->max_step));


  		




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    for (i = 0; i < 4; i++) {


  		




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        const AVComponentDescriptor *comp = &(pix_desc->comp[i]);


  		




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        if ((comp->step_minus1+1) > crop->max_step[comp->plane])


  		




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            crop->max_step[comp->plane] = comp->step_minus1+1;


  		




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    }


  		




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    av_fill_image_max_pixstep(crop->max_step, NULL, pix_desc);


  		




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    crop->hsub = av_pix_fmt_descriptors[link->format].log2_chroma_w;


  		




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    crop->vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;


  		




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