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vf_lut: fix draw_slice() in case of non packed image data for packed RGB

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The previous code was erroneously assuming that the linesize was
equivalent to width*pixel_step, which is not always true.
This commit is contained in:
Stefano Sabatini 2011-06-26 18:49:00 +02:00
parent 9df1d329a5
commit cdeb803e2f
1 changed files with 7 additions and 3 deletions
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10
libavfilter/vf_lut.c
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@ -306,21 +306,25 @@ static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
AVFilterLink *outlink = ctx->outputs[0];
AVFilterBufferRef *inpic = inlink ->cur_buf;
AVFilterBufferRef *outpic = outlink->out_buf;
uint8_t *inrow, *outrow;
uint8_t *inrow, *outrow, *inrow0, *outrow0;
int i, j, k, plane;
if (lut->is_rgb) {
/* packed */
inrow = inpic ->data[0] + y * inpic ->linesize[0];
outrow = outpic->data[0] + y * outpic->linesize[0];
inrow0 = inpic ->data[0] + y * inpic ->linesize[0];
outrow0 = outpic->data[0] + y * outpic->linesize[0];
for (i = 0; i < h; i ++) {
inrow = inrow0;
outrow = outrow0;
for (j = 0; j < inlink->w; j++) {
for (k = 0; k < lut->step; k++)
outrow[k] = lut->lut[lut->rgba_map[k]][inrow[k]];
outrow += lut->step;
inrow += lut->step;
}
inrow0 += inpic ->linesize[0];
outrow0 += outpic->linesize[0];
}
} else {
/* planar */