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libavcodec/exr : fix decoding piz float file.

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fix ticket #5674

the size of data to process in piz_uncompress, is now calc
using the pixel type of each channel.

the data reorganization, alos take care about the size of
each channel

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Martin Vignali 2016-06-28 13:23:43 +02:00 committed by Michael Niedermayer
parent 1df908f33f
commit d9e1e08133
1 changed files with 27 additions and 10 deletions
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37
libavcodec/exr.c
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@ -749,6 +749,9 @@ static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize,
uint16_t *tmp = (uint16_t *)td->tmp;
uint8_t *out;
int ret, i, j;
int pixel_half_size;/* 1 for half, 2 for float and uint32 */
EXRChannel *channel;
int tmp_offset;
if (!td->bitmap)
td->bitmap = av_malloc(BITMAP_SIZE);
@ -781,24 +784,38 @@ static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize,
ptr = tmp;
for (i = 0; i < s->nb_channels; i++) {
EXRChannel *channel = &s->channels[i];
int size = channel->pixel_type;
channel = &s->channels[i];
for (j = 0; j < size; j++)
wav_decode(ptr + j, td->xsize, size, td->ysize,
td->xsize * size, maxval);
ptr += td->xsize * td->ysize * size;
if (channel->pixel_type == EXR_HALF)
pixel_half_size = 1;
else
pixel_half_size = 2;
for (j = 0; j < pixel_half_size; j++)
wav_decode(ptr + j, td->xsize, pixel_half_size, td->ysize,
td->xsize * pixel_half_size, maxval);
ptr += td->xsize * td->ysize * pixel_half_size;
}
apply_lut(td->lut, tmp, dsize / sizeof(uint16_t));
out = td->uncompressed_data;
for (i = 0; i < td->ysize; i++)
for (i = 0; i < td->ysize; i++) {
tmp_offset = 0;
for (j = 0; j < s->nb_channels; j++) {
uint16_t *in = tmp + j * td->xsize * td->ysize + i * td->xsize;
memcpy(out, in, td->xsize * 2);
out += td->xsize * 2;
uint16_t *in;
EXRChannel *channel = &s->channels[j];
if (channel->pixel_type == EXR_HALF)
pixel_half_size = 1;
else
pixel_half_size = 2;
in = tmp + tmp_offset * td->xsize * td->ysize + i * td->xsize * pixel_half_size;
tmp_offset += pixel_half_size;
memcpy(out, in, td->xsize * 2 * pixel_half_size);
out += td->xsize * 2 * pixel_half_size;
}
}
return 0;
}