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lagarith: fix alignment on buffers passed into prediction dsp code.

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This should fix issues with direct rendering

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-08-23 19:03:57 +02:00
parent 732dfc7660
commit 2b3b52d519
1 changed files with 15 additions and 11 deletions
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24
libavcodec/lagarith.c
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@ -250,8 +250,8 @@ static void lag_pred_line(LagarithContext *l, uint8_t *buf,
if (!line) {
/* Left prediction only for first line */
L = l->dsp.add_hfyu_left_prediction(buf + 1, buf + 1,
width - 1, buf[0]);
L = l->dsp.add_hfyu_left_prediction(buf, buf,
width, 0);
} else {
/* Left pixel is actually prev_row[width] */
L = buf[width - stride - 1];
@ -277,11 +277,12 @@ static void lag_pred_line_yuy2(LagarithContext *l, uint8_t *buf,
int L, TL;
if (!line) {
if (is_luma) {
buf++;
width--;
}
l->dsp.add_hfyu_left_prediction(buf + 1, buf + 1, width - 1, buf[0]);
L= buf[0];
if (is_luma)
buf[0] = 0;
l->dsp.add_hfyu_left_prediction(buf, buf, width, 0);
if (is_luma)
buf[0] = L;
return;
}
if (line == 1) {
@ -294,15 +295,18 @@ static void lag_pred_line_yuy2(LagarithContext *l, uint8_t *buf,
L += buf[i];
buf[i] = L;
}
buf += HEAD;
width -= HEAD;
for (; i<width; i++) {
L = mid_pred(L&0xFF, buf[i-stride], (L + buf[i-stride] - TL)&0xFF) + buf[i];
TL = buf[i-stride];
buf[i]= L;
}
} else {
TL = buf[width - (2 * stride) - 1];
L = buf[width - stride - 1];
}
l->dsp.add_hfyu_median_prediction(buf, buf - stride, buf, width,
&L, &TL);
}
}
static int lag_decode_line(LagarithContext *l, lag_rac *rac,
uint8_t *dst, int width, int stride,