+static int pxr24_uncompress(EXRContext *s, const uint8_t *src,
+ int compressed_size, int uncompressed_size,
+ EXRThreadData *td)
+{
+ unsigned long dest_len = uncompressed_size;
+ const uint8_t *in = td->tmp;
+ uint8_t *out;
+ int c, i, j;
+
+ if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK ||
+ dest_len != uncompressed_size)
+ return AVERROR(EINVAL);
+
+ out = td->uncompressed_data;
+ for (i = 0; i < s->ysize; i++) {
+ for (c = 0; c < s->nb_channels; c++) {
+ EXRChannel *channel = &s->channels[c];
+ const uint8_t *ptr[4];
+ uint32_t pixel = 0;
+
+ switch (channel->pixel_type) {
+ case EXR_FLOAT:
+ ptr[0] = in;
+ ptr[1] = ptr[0] + s->xdelta;
+ ptr[2] = ptr[1] + s->xdelta;
+ in = ptr[2] + s->xdelta;
+
+ for (j = 0; j < s->xdelta; ++j) {
+ uint32_t diff = (*(ptr[0]++) << 24) |
+ (*(ptr[1]++) << 16) |
+ (*(ptr[2]++) << 8);
+ pixel += diff;
+ AV_WL32(out, pixel);
+ }
+ break;
+ case EXR_HALF:
+ ptr[0] = in;
+ ptr[1] = ptr[0] + s->xdelta;
+ in = ptr[1] + s->xdelta;
+ for (j = 0; j < s->xdelta; j++, out += 2) {
+ uint32_t diff = (*(ptr[0]++) << 8) | *(ptr[1]++);
+
+ pixel += diff;
+ AV_WL16(out, pixel);
+ }
+ break;
+ default:
+ av_assert1(0);
+ }
+ }
+ }
+
+ return 0;
+}
+