dtx: add decoding for AMR-DTX frames
gsm0503_coding contains AMR decoder functions for HR and FR. Those can
only decode AMR payload frames but not amr DTX frames. Lets add
functionality to detect DTX frames. Also lets add decoding for SID_UPDATE
frames as well as error checking for the SID frame recognition patterns.
Related: OS#2978
Change-Id: I2bbdb39ea20461ca08b2e6f1a33532cb55cd5195
diff --git a/tests/dtx/dtx_gsm0503_test.ok b/tests/dtx/dtx_gsm0503_test.ok
new file mode 100644
index 0000000..a95a18b
--- /dev/null
+++ b/tests/dtx/dtx_gsm0503_test.ok
@@ -0,0 +1,11 @@
+FR AMR DTX FRAMES:
+ ==> AFS_SID_FIRST, n_errors=0, n_bits_total=212
+ ==> AFS_SID_UPDATE, n_errors=0, n_bits_total=212
+ ==> AFS_ONSET, n_errors=0, n_bits_total=228
+HR AMR DTX FRAMES:
+ ==> AHS_SID_UPDATE, n_errors=0, n_bits_total=212
+ ==> AHS_SID_FIRST_P1, n_errors=0, n_bits_total=212
+ ==> AHS_SID_FIRST_P2, n_errors=0, n_bits_total=114
+ ==> AHS_ONSET, n_errors=0, n_bits_total=114
+ ==> AHS_SID_FIRST_INH, n_errors=0, n_bits_total=212
+ ==> AHS_SID_UPDATE_INH, n_errors=0, n_bits_total=212