AVSubtitle *sub = data;
const uint8_t *buf_end = buf + buf_size;
uint8_t *bitmap;
- int w, h, x, y, rlelen, i;
+ int w, h, x, y, i;
int64_t packet_time = 0;
GetBitContext gb;
-
- memset(sub, 0, sizeof(*sub));
+ int has_alpha = avctx->codec_tag == MKTAG('D','X','S','A');
// check that at least header fits
if (buf_size < 27 + 7 * 2 + 4 * 3) {
// skip bottom right position, it gives no new information
bytestream_get_le16(&buf);
bytestream_get_le16(&buf);
- rlelen = bytestream_get_le16(&buf);
+ // The following value is supposed to indicate the start offset
+ // (relative to the palette) of the data for the second field,
+ // however there are files where it has a bogus value and thus
+ // we just ignore it
+ bytestream_get_le16(&buf);
// allocate sub and set values
sub->rects = av_mallocz(sizeof(*sub->rects));
for (i = 0; i < sub->rects[0]->nb_colors; i++)
((uint32_t*)sub->rects[0]->pict.data[1])[i] = bytestream_get_be24(&buf);
// make all except background (first entry) non-transparent
- for (i = 1; i < sub->rects[0]->nb_colors; i++)
- ((uint32_t*)sub->rects[0]->pict.data[1])[i] |= 0xff000000;
+ for (i = 0; i < sub->rects[0]->nb_colors; i++)
+ ((uint32_t*)sub->rects[0]->pict.data[1])[i] |= (has_alpha ? *buf++ : (i ? 0xff : 0)) << 24;
// process RLE-compressed data
- rlelen = FFMIN(rlelen, buf_end - buf);
- init_get_bits(&gb, buf, rlelen * 8);
+ init_get_bits(&gb, buf, (buf_end - buf) * 8);
bitmap = sub->rects[0]->pict.data[0];
for (y = 0; y < h; y++) {
// interlaced: do odd lines