diff options
Diffstat (limited to 'libavcodec/xsubdec.c')
| -rw-r--r-- | libavcodec/xsubdec.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/libavcodec/xsubdec.c b/libavcodec/xsubdec.c index d7babe4..9289a25 100644 --- a/libavcodec/xsubdec.c +++ b/libavcodec/xsubdec.c @@ -51,7 +51,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, 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; int has_alpha = avctx->codec_tag == MKTAG('D','X','S','A'); @@ -83,7 +83,11 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, // 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)); @@ -105,8 +109,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, ((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 |
