+OPJ_BOOL opj_j2k_set_threads(opj_j2k_t *j2k, OPJ_UINT32 num_threads)
+{
+ if( opj_has_thread_support() )
+ {
+ opj_thread_pool_destroy(j2k->m_tp);
+ j2k->m_tp = opj_thread_pool_create((int)num_threads);
+ if( j2k->m_tp == 0 )
+ {
+ j2k->m_tp = opj_thread_pool_create(0);
+ return OPJ_FALSE;
+ }
+ return OPJ_TRUE;
+ }
+ return OPJ_FALSE;
+}
+
+static int opj_j2k_get_default_thread_count()
+{
+ const char* num_threads = getenv("OPJ_NUM_THREADS");
+ if( num_threads == NULL || !opj_has_thread_support() )
+ return 0;
+ if( strcmp(num_threads, "ALL_CPUS") == 0 )
+ return opj_get_num_cpus();
+ return atoi(num_threads);
+}
+