+/*
+ * Count exponent bits based on bandwidth, coupling, and exponent strategies.
+ */
+static int count_exponent_bits(AC3EncodeContext *s)
+{
+ int blk, ch;
+ int nb_groups, bit_count;
+
+ bit_count = 0;
+ for (blk = 0; blk < s->num_blocks; blk++) {
+ AC3Block *block = &s->blocks[blk];
+ for (ch = !block->cpl_in_use; ch <= s->channels; ch++) {
+ int exp_strategy = s->exp_strategy[ch][blk];
+ int cpl = (ch == CPL_CH);
+ int nb_coefs = block->end_freq[ch] - s->start_freq[ch];
+
+ if (exp_strategy == EXP_REUSE)
+ continue;
+
+ nb_groups = exponent_group_tab[cpl][exp_strategy-1][nb_coefs];
+ bit_count += 4 + (nb_groups * 7);
+ }
+ }
+
+ return bit_count;
+}
+
+