mirror of https://github.com/mpv-player/mpv
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/* Stuff for correct aspect scaling. */
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//#define ASPECT_DEBUG
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#ifdef ASPECT_DEBUG
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#include <stdio.h>
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#endif
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float monitor_aspect=4.0/3.0;
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/* aspect is called with the source resolution and the
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* resolution, that the scaled image should fit into
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*/
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void aspect(int *srcw, int *srch, int fitinw, int fitinh){
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int srcwcp, srchcp, tmp;
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srcwcp=*srcw; srchcp=*srch;
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srcwcp=fitinw;
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#ifdef ASPECT_DEBUG
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printf("aspect(0) fitin: %dx%d \n",fitinw,fitinh);
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printf("aspect(1) wh: %dx%d (org: %dx%d)\n",srcwcp,srchcp,*srcw,*srch);
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#endif
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srchcp=(int)(((float)fitinw / (float)*srcw * (float)*srch)
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* ((float)fitinh / ((float)fitinw / monitor_aspect)));
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srchcp+=srchcp%2; // round
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#ifdef ASPECT_DEBUG
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printf("aspect(2) wh: %dx%d (org: %dx%d)\n",srcwcp,srchcp,*srcw,*srch);
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#endif
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if(srchcp>fitinh || srchcp<*srch){
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tmp=(int)(((float)fitinh / (float)*srch * (float)*srcw)
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* ((float)fitinw / ((float)fitinh / (1/monitor_aspect))));
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if(srcwcp>fitinw){
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srchcp=fitinh;
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srcwcp=tmp;
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srcwcp+=srcwcp%2; // round
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}
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}
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#ifdef ASPECT_DEBUG
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printf("aspect(3) wh: %dx%d (org: %dx%d)\n",srcwcp,srchcp,*srcw,*srch);
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#endif
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*srcw=srcwcp; *srch=srchcp;
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#ifdef ASPECT_DEBUG
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printf("aspect(4) wh: %dx%d (org: %dx%d)\n",srcwcp,srchcp,*srcw,*srch);
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#endif
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}
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