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tiff: correctly decode saparate planes with horizontal differencing predictor

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Closes #2648.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-06-06 19:42:01 +00:00
parent 00f4998997
commit 8cc8adaa88
1 changed files with 8 additions and 2 deletions
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10
libavcodec/tiff.c
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@ -1178,16 +1178,22 @@ static int decode_frame(AVCodecContext *avctx,
if (s->predictor == 2) {
dst = p->data[plane];
soff = s->bpp >> 3;
if (s->planar)
soff = FFMAX(soff / s->bppcount, 1);
ssize = s->width * soff;
if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||
s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE) {
s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||
s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||
s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {
for (i = 0; i < s->height; i++) {
for (j = soff; j < ssize; j += 2)
AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));
dst += stride;
}
} else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||
s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {
s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||
s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||
s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {
for (i = 0; i < s->height; i++) {
for (j = soff; j < ssize; j += 2)
AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));