/** Maximum number of matrices used in decoding; most streams have one matrix
* per output channel, but some rematrix a channel (usually 0) more than once.
*/
+#define MAX_MATRICES_MLP 6
+#define MAX_MATRICES_TRUEHD 8
#define MAX_MATRICES 15
/** Maximum number of substreams that can be decoded.
{
SubStream *s = &m->substream[substr];
unsigned int mat, ch;
+ const int max_primitive_matrices = m->avctx->codec_id == CODEC_ID_MLP
+ ? MAX_MATRICES_MLP
+ : MAX_MATRICES_TRUEHD;
if (m->matrix_changed++ > 1) {
av_log(m->avctx, AV_LOG_ERROR, "Matrices may change only once per access unit.\n");
s->num_primitive_matrices = get_bits(gbp, 4);
+ if (s->num_primitive_matrices > max_primitive_matrices) {
+ av_log(m->avctx, AV_LOG_ERROR,
+ "Number of primitive matrices cannot be greater than %d.\n",
+ max_primitive_matrices);
+ return -1;
+ }
+
for (mat = 0; mat < s->num_primitive_matrices; mat++) {
int frac_bits, max_chan;
s->matrix_out_ch[mat] = get_bits(gbp, 4);