sws: do not use av_pix_fmt_descriptors directly

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libswscale/swscale.c

@@ -73,7 +73,7 @@ static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW,
     int bits            = desc->comp[0].depth_minus1;
     int sh              = bits - 4;
 
-    if((isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8) && av_pix_fmt_descriptors[c->srcFormat].comp[0].depth_minus1<15)
+    if((isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8) && desc->comp[0].depth_minus1<15)
         sh= 9;
 
     for (i = 0; i < dstW; i++) {
@@ -99,7 +99,7 @@ static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW,
     int sh              = desc->comp[0].depth_minus1;
 
     if(sh<15)
-        sh= isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8 ? 13 : av_pix_fmt_descriptors[c->srcFormat].comp[0].depth_minus1;
+        sh= isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8 ? 13 : desc->comp[0].depth_minus1;
 
     for (i = 0; i < dstW; i++) {
         int j;

libswscale/utils.c

@@ -1234,7 +1234,7 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
 
     // try to avoid drawing green stuff between the right end and the stride end
     for (i = 0; i < c->vChrBufSize; i++)
-        if(av_pix_fmt_descriptors[c->dstFormat].comp[0].depth_minus1 == 15){
+        if(desc_dst->comp[0].depth_minus1 == 15){
             av_assert0(c->dstBpc > 14);
             for(j=0; j<dst_stride/2+1; j++)
                 ((int32_t*)(c->chrUPixBuf[i]))[j] = 1<<18;