const int t3 = OP( 2408 * blk[5 * step] - 1609 * blk[3 * step]); \
const int t4 = OP( 1108 * blk[2 * step] - 2676 * blk[6 * step]); \
const int t5 = OP( 2676 * blk[2 * step] + 1108 * blk[6 * step]); \
- const int t6 = ((blk[0 * step] + blk[4 * step]) << dshift) + bias; \
- const int t7 = ((blk[0 * step] - blk[4 * step]) << dshift) + bias; \
+ const int t6 = ((blk[0 * step] + blk[4 * step]) * (1 << dshift)) + bias; \
+ const int t7 = ((blk[0 * step] - blk[4 * step]) * (1 << dshift)) + bias; \
const int t8 = t0 + t2; \
const int t9 = t0 - t2; \
- const int tA = 181 * (t9 + (t1 - t3)) + 0x80 >> 8; \
- const int tB = 181 * (t9 - (t1 - t3)) + 0x80 >> 8; \
+ const int tA = (int)(181U * (t9 + (t1 - t3)) + 0x80) >> 8; \
+ const int tB = (int)(181U * (t9 - (t1 - t3)) + 0x80) >> 8; \
const int tC = t1 + t3; \
\
blk[0 * step] = (t6 + t5 + t8) >> shift; \
c->pic->pict_type = frame_type & 0x20 ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
if (frame_type & 0x2) {
+ if (buf_size < c->mb_width * c->mb_height) {
+ av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
+ return AVERROR_INVALIDDATA;
+ }
+
bytestream2_get_be32(&gb); // frame size;
c->ac_quant = bytestream2_get_byte(&gb);
c->luma_dc_quant = 32;