codec: Add functions for AMR s->d bits and d->s bits
These functions implement re-ordering of bits as per TS 06.90 / 26.101
based on the already existing tables we've had in libosmocoding.
Change-Id: Ia4ac2aea2e96f9185f082a07ca64dfc5276efb46
diff --git a/tests/codec/codec_test.c b/tests/codec/codec_test.c
index 7a10fc5..5579e99 100644
--- a/tests/codec/codec_test.c
+++ b/tests/codec/codec_test.c
@@ -190,6 +190,42 @@
}
}
+
+
+static void test_amr_s_d(void)
+{
+ ubit_t in[244];
+ ubit_t mid[244];
+ ubit_t out[244];
+ int i, j;
+
+ for (j = AMR_4_75; j <= AMR_12_2; j++) {
+ unsigned int n_bits = gsm690_bitlength[j];
+
+ printf("=> AMR Mode %d (%d bits)\n", j, n_bits);
+ /* set a single bit in the input buffer */
+ for (i = 0; i < n_bits; i++) {
+
+ memset(in, 0, sizeof(in));
+ in[i] = 1;
+
+ /* re-order from s to d */
+ osmo_amr_s_to_d(mid, in, n_bits, j);
+
+ /* and back to d */
+ osmo_amr_d_to_s(out, mid, n_bits, j);
+
+ if (memcmp(in, out, n_bits)) {
+ printf("Error in bit %d of mode %d!\n", i, j);
+ printf("inp s-bits: %s\n", osmo_ubit_dump(in, n_bits));
+ printf("mid d-bits: %s\n", osmo_ubit_dump(mid, n_bits));
+ printf("out s-bits: %s\n", osmo_ubit_dump(out, n_bits));
+ //OSMO_ASSERT(0);
+ }
+ }
+ }
+}
+
int main(int argc, char **argv)
{
printf("AMR RTP payload decoder test:\n");
@@ -213,6 +249,9 @@
printf("FR RTP payload SID test:\n");
test_sid_fr();
+ printf("AMR s/d bit re-ordering test:\n");
+ test_amr_s_d();
+
return 0;
}