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Make dct_unquantize_h263 work on systems without MVI extension.

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Originally committed as revision 715 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Falk Hüffner 2002-07-03 23:30:32 +00:00
parent e0580f8c68
commit 2dbe7ec87c
1 changed files with 11 additions and 6 deletions
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17
libavcodec/alpha/mpegvideo_alpha.c
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@ -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;
}