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Cast signed libopenjpeg data values to unsigned before shifting.

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This avoids undefined behaviour on left-shift.

Reviewed-by: Michael Bradshaw
This commit is contained in:
Carl Eugen Hoyos 2014-01-11 00:03:37 +01:00
parent a1ed1c2193
commit 26fc6ffec4
1 changed files with 2 additions and 2 deletions
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4
libavcodec/libopenjpegdec.c
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@ -180,7 +180,7 @@ static inline void libopenjpeg_copy_to_packed16(AVFrame *picture, opj_image_t *i
img_ptr = (uint16_t*) (picture->data[0] + y*picture->linesize[0]);
for (x = 0; x < picture->width; x++, index++) {
for (c = 0; c < image->numcomps; c++) {
*img_ptr++ = 0x8000 * image->comps[c].sgnd + (image->comps[c].data[index] << adjust[c]);
*img_ptr++ = 0x8000 * image->comps[c].sgnd + ((unsigned)image->comps[c].data[index] << adjust[c]);
}
}
}
@ -217,7 +217,7 @@ static inline void libopenjpeg_copyto16(AVFrame *picture, opj_image_t *image) {
for (y = 0; y < image->comps[index].h; y++) {
img_ptr = (uint16_t*) (picture->data[index] + y * picture->linesize[index]);
for (x = 0; x < image->comps[index].w; x++) {
*img_ptr = 0x8000 * image->comps[index].sgnd + (*comp_data << adjust[index]);
*img_ptr = 0x8000 * image->comps[index].sgnd + ((unsigned)*comp_data << adjust[index]);
img_ptr++;
comp_data++;
}