cosmetics: Fix AltiVec spelling.

Originally committed as revision 10639 to svn://svn.ffmpeg.org/ffmpeg/trunk

doc/optimization.txt

@@ -168,10 +168,10 @@ http://download.intel.com/design/intelxscale/27347302.pdf
 
 PowerPC-specific:
 
-PowerPC32/Altivec PIM:
+PowerPC32/AltiVec PIM:
 www.freescale.com/files/32bit/doc/ref_manual/ALTIVECPEM.pdf
 
-PowerPC32/Altivec PEM:
+PowerPC32/AltiVec PEM:
 www.freescale.com/files/32bit/doc/ref_manual/ALTIVECPIM.pdf
 
 CELL/SPU:

libavcodec/ppc/dsputil_altivec.c

@@ -216,7 +216,7 @@ int sad16_xy2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int
         pix3iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[1]));
 
         /*
-          Note that Altivec does have vec_avg, but this works on vector pairs
+          Note that AltiVec does have vec_avg, but this works on vector pairs
           and rounds up. We could do avg(avg(a,b),avg(c,d)), but the rounding
           would mean that, for example, avg(3,0,0,1) = 2, when it should be 1.
           Instead, we have to split the pixel vectors into vectors of shorts,

libavcodec/ppc/dsputil_ppc.c

@@ -257,7 +257,7 @@ static void prefetch_ppc(void *mem, int stride, int h)
 
 void dsputil_init_ppc(DSPContext* c, AVCodecContext *avctx)
 {
-    // Common optimizations whether Altivec is available or not
+    // Common optimizations whether AltiVec is available or not
     c->prefetch = prefetch_ppc;
     switch (check_dcbzl_effect()) {
         case 32:

libavcodec/ppc/mpegvideo_ppc.c

@@ -51,14 +51,14 @@ void MPV_common_init_ppc(MpegEncContext *s)
         (((long)(s->q_inter_matrix) & 0x0f) != 0))
     {
         av_log(s->avctx, AV_LOG_INFO, "Internal Error: q-matrix blocks must be 16-byte aligned "
-                "to use Altivec DCT. Reverting to non-altivec version.\n");
+                "to use AltiVec DCT. Reverting to non-AltiVec version.\n");
         return;
     }
 
     if (((long)(s->intra_scantable.inverse) & 0x0f) != 0)
     {
         av_log(s->avctx, AV_LOG_INFO, "Internal Error: scan table blocks must be 16-byte aligned "
-                "to use Altivec DCT. Reverting to non-altivec version.\n");
+                "to use AltiVec DCT. Reverting to non-AltiVec version.\n");
         return;
     }
 

libavcodec/ppc/snow_altivec.c

 /*
- * Altivec optimized snow DSP utils
+ * AltiVec-optimized snow DSP utils
  * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
  *
  * This file is part of FFmpeg.