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* Fix dct_unquantize_h263_axp for changed block_last_index indexing. 

* Set qadd to 0 for intra with h263_aic (whatever that may be).

Originally committed as revision 1009 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Falk Hüffner 2002-10-07 02:03:21 +00:00
parent bb76a117b1
commit acd2e05c47
1 changed files with 11 additions and 10 deletions
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21
libavcodec/alpha/mpegvideo_alpha.c
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@ -30,24 +30,26 @@ static void dct_unquantize_h263_axp(MpegEncContext *s, DCTELEM *block,
DCTELEM *orig_block = block;
DCTELEM block0;
qadd = WORD_VEC((qscale - 1) | 1);
qmul = qscale << 1;
/* This mask kills spill from negative subwords to the next subword. */
correction = WORD_VEC((qmul - 1) + 1); /* multiplication / addition */
if (s->mb_intra) {
if (!s->h263_aic) {
if (n < 4)
block0 = block[0] * s->y_dc_scale;
else
block0 = block[0] * s->c_dc_scale;
}
n_coeffs = 64; // does not always use zigzag table
} else {
qadd = 0;
}
n_coeffs = 63; // does not always use zigzag table
} else {
n_coeffs = s->intra_scantable.raster_end[s->block_last_index[n]];
}
qmul = qscale << 1;
qadd = WORD_VEC((qscale - 1) | 1);
/* This mask kills spill from negative subwords to the next subword. */
correction = WORD_VEC((qmul - 1) + 1); /* multiplication / addition */
for(i = 0; i < n_coeffs; block += 4, i += 4) {
for(i = 0; i <= n_coeffs; block += 4, i += 4) {
uint64_t levels, negmask, zeros, add;
levels = ldq(block);
@ -91,6 +93,5 @@ static void dct_unquantize_h263_axp(MpegEncContext *s, DCTELEM *block,
void MPV_common_init_axp(MpegEncContext *s)
{
/* disabled for now, buggy */
//s->dct_unquantize_h263 = dct_unquantize_h263_axp;
s->dct_unquantize_h263 = dct_unquantize_h263_axp;
}