Give IDCT matrix transpose macro a more descriptive name

This also avoids a macro name clash and related warning on ARM.

libavcodec/h264.c

@@ -2904,18 +2904,18 @@ static void init_scan_tables(H264Context *h)
 {
     int i;
     for (i = 0; i < 16; i++) {
-#define T(x) (x >> 2) | ((x << 2) & 0xF)
-        h->zigzag_scan[i] = T(zigzag_scan[i]);
-        h->field_scan[i]  = T(field_scan[i]);
-#undef T
+#define TRANSPOSE(x) (x >> 2) | ((x << 2) & 0xF)
+        h->zigzag_scan[i] = TRANSPOSE(zigzag_scan[i]);
+        h->field_scan[i]  = TRANSPOSE(field_scan[i]);
+#undef TRANSPOSE
     }
     for (i = 0; i < 64; i++) {
-#define T(x) (x >> 3) | ((x & 7) << 3)
-        h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
-        h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
-        h->field_scan8x8[i]        = T(field_scan8x8[i]);
-        h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
-#undef T
+#define TRANSPOSE(x) (x >> 3) | ((x & 7) << 3)
+        h->zigzag_scan8x8[i]       = TRANSPOSE(ff_zigzag_direct[i]);
+        h->zigzag_scan8x8_cavlc[i] = TRANSPOSE(zigzag_scan8x8_cavlc[i]);
+        h->field_scan8x8[i]        = TRANSPOSE(field_scan8x8[i]);
+        h->field_scan8x8_cavlc[i]  = TRANSPOSE(field_scan8x8_cavlc[i]);
+#undef TRANSPOSE
     }
     if (h->sps.transform_bypass) { // FIXME same ugly
         h->zigzag_scan_q0          = zigzag_scan;

libavcodec/vp3.c

@@ -1705,10 +1705,10 @@ static av_cold int vp3_decode_init(AVCodecContext *avctx)
     ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
 
     for (i = 0; i < 64; i++) {
-#define T(x) (x >> 3) | ((x & 7) << 3)
-        s->idct_permutation[i] = T(i);
-        s->idct_scantable[i] = T(ff_zigzag_direct[i]);
-#undef T
+#define TRANSPOSE(x) (x >> 3) | ((x & 7) << 3)
+        s->idct_permutation[i] = TRANSPOSE(i);
+        s->idct_scantable[i]   = TRANSPOSE(ff_zigzag_direct[i]);
+#undef TRANSPOSE
     }
 
     /* initialize to an impossible value which will force a recalculation

libavcodec/vp56.c

@@ -664,9 +664,9 @@ av_cold int ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
     ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
     ff_vp56dsp_init(&s->vp56dsp, avctx->codec->id);
     for (i = 0; i < 64; i++) {
-#define T(x) (x >> 3) | ((x & 7) << 3)
-        s->idct_scantable[i] = T(ff_zigzag_direct[i]);
-#undef T
+#define TRANSPOSE(x) (x >> 3) | ((x & 7) << 3)
+        s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]);
+#undef TRANSPOSE
     }
 
     for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) {