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authorFalk Hüffner <mellum@users.sourceforge.net>2002-07-03 23:30:32 +0000
committerFalk Hüffner <mellum@users.sourceforge.net>2002-07-03 23:30:32 +0000
commit2dbe7ec87ca78bed69fc28d798a2efb0fec77f9a (patch)
treeb927819fcb89878ddfa86a1e25048b8a052824d4 /libavcodec/alpha
parente0580f8c688f0dcb87f2bf71b08f477ba583e8dd (diff)
downloadffmpeg-streaming-2dbe7ec87ca78bed69fc28d798a2efb0fec77f9a.zip
ffmpeg-streaming-2dbe7ec87ca78bed69fc28d798a2efb0fec77f9a.tar.gz
Make dct_unquantize_h263 work on systems without MVI extension.
Originally committed as revision 715 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/alpha')
-rw-r--r--libavcodec/alpha/mpegvideo_alpha.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/libavcodec/alpha/mpegvideo_alpha.c b/libavcodec/alpha/mpegvideo_alpha.c
index 443857e..0be3270 100644
--- a/libavcodec/alpha/mpegvideo_alpha.c
+++ b/libavcodec/alpha/mpegvideo_alpha.c
@@ -23,7 +23,7 @@
extern UINT8 zigzag_end[64];
-static void dct_unquantize_h263_mvi(MpegEncContext *s, DCTELEM *block,
+static void dct_unquantize_h263_axp(MpegEncContext *s, DCTELEM *block,
int n, int qscale)
{
int i, n_coeffs;
@@ -32,8 +32,6 @@ static void dct_unquantize_h263_mvi(MpegEncContext *s, DCTELEM *block,
DCTELEM *orig_block = block;
DCTELEM block0;
- ASM_ACCEPT_MVI;
-
if (s->mb_intra) {
if (!s->h263_aic) {
if (n < 4)
@@ -58,8 +56,17 @@ static void dct_unquantize_h263_mvi(MpegEncContext *s, DCTELEM *block,
if (levels == 0)
continue;
+#ifdef __alpha_max__
+ /* I don't think the speed difference justifies runtime
+ detection. */
+ ASM_ACCEPT_MVI;
negmask = maxsw4(levels, -1); /* negative -> ffff (-1) */
negmask = minsw4(negmask, 0); /* positive -> 0000 (0) */
+#else
+ negmask = cmpbge(WORD_VEC(0x7fff), levels);
+ negmask &= (negmask >> 1) | (1 << 7);
+ negmask = zap(-1, negmask);
+#endif
zeros = cmpbge(0, levels);
zeros &= zeros >> 1;
@@ -86,7 +93,5 @@ static void dct_unquantize_h263_mvi(MpegEncContext *s, DCTELEM *block,
void MPV_common_init_axp(MpegEncContext *s)
{
- if (amask(AMASK_MVI) == 0) {
- s->dct_unquantize_h263 = dct_unquantize_h263_mvi;
- }
+ s->dct_unquantize_h263 = dct_unquantize_h263_axp;
}
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