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libavcodec/exr : fix piz uncompress on big endian

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Martin Vignali 2017-04-23 15:38:14 +02:00 committed by Michael Niedermayer
parent cac8de2da5
commit 37f4d22075
1 changed files with 23 additions and 5 deletions
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28
libavcodec/exr.c
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@ -45,6 +45,11 @@
#include "avcodec.h"
#include "bytestream.h"
#if HAVE_BIGENDIAN
#include "bswapdsp.h"
#endif
#include "get_bits.h"
#include "internal.h"
#include "mathops.h"
@ -116,6 +121,10 @@ typedef struct EXRContext {
AVFrame *picture;
AVCodecContext *avctx;
#if HAVE_BIGENDIAN
BswapDSPContext bbdsp;
#endif
enum ExrCompr compression;
enum ExrPixelType pixel_type;
int channel_offsets[4]; // 0 = red, 1 = green, 2 = blue and 3 = alpha
@ -751,7 +760,8 @@ static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize,
uint16_t maxval, min_non_zero, max_non_zero;
uint16_t *ptr;
uint16_t *tmp = (uint16_t *)td->tmp;
uint8_t *out;
uint16_t *out;
uint16_t *in;
int ret, i, j;
int pixel_half_size;/* 1 for half, 2 for float and uint32 */
EXRChannel *channel;
@ -803,12 +813,11 @@ static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize,
apply_lut(td->lut, tmp, dsize / sizeof(uint16_t));
out = td->uncompressed_data;
out = (uint16_t *)td->uncompressed_data;
for (i = 0; i < td->ysize; i++) {
tmp_offset = 0;
for (j = 0; j < s->nb_channels; j++) {
uint16_t *in;
EXRChannel *channel = &s->channels[j];
channel = &s->channels[j];
if (channel->pixel_type == EXR_HALF)
pixel_half_size = 1;
else
@ -816,8 +825,13 @@ static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize,
in = tmp + tmp_offset * td->xsize * td->ysize + i * td->xsize * pixel_half_size;
tmp_offset += pixel_half_size;
#if HAVE_BIGENDIAN
s->bbdsp.bswap16_buf(out, in, td->xsize * pixel_half_size);
#else
memcpy(out, in, td->xsize * 2 * pixel_half_size);
out += td->xsize * 2 * pixel_half_size;
#endif
out += td->xsize * pixel_half_size;
}
}
@ -1793,6 +1807,10 @@ static av_cold int decode_init(AVCodecContext *avctx)
s->avctx = avctx;
#if HAVE_BIGENDIAN
ff_bswapdsp_init(&s->bbdsp);
#endif
trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type);
if (trc_func) {
for (i = 0; i < 65536; ++i) {