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avcodec/exr: improve pxr24 uncompress

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Fix pxr24 uncompress when all channels doesnt have the same pixel type.
The expected length after zip decoding, is now calculated channel by channel.
This commit is contained in:
Martin Vignali 2016-06-04 14:24:08 +02:00 committed by Paul B Mahol
parent 16107aeaf3
commit 03152e74df
1 changed files with 10 additions and 5 deletions
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15
libavcodec/exr.c
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@ -805,15 +805,20 @@ static int pxr24_uncompress(EXRContext *s, const uint8_t *src,
int compressed_size, int uncompressed_size,
EXRThreadData *td)
{
unsigned long dest_len, expected_len;
unsigned long dest_len, expected_len = 0;
const uint8_t *in = td->tmp;
uint8_t *out;
int c, i, j;
if (s->pixel_type == EXR_FLOAT)
expected_len = (uncompressed_size / 4) * 3; /* PRX 24 store float in 24 bit instead of 32 */
else
expected_len = uncompressed_size;
for (i = 0; i < s->nb_channels; i++) {
if (s->channels[i].pixel_type == EXR_FLOAT) {
expected_len += (td->xsize * td->ysize * 3);/* PRX 24 store float in 24 bit instead of 32 */
} else if (s->channels[i].pixel_type == EXR_HALF) {
expected_len += (td->xsize * td->ysize * 2);
} else {//UINT 32
expected_len += (td->xsize * td->ysize * 4);
}
}
dest_len = expected_len;