Import xHE-AAC decoder from Ittiam

Clean copy of version XHEAAC_V1_36 as delivered 2018/4/13
Sole change is to map cr/lf line termination to unix lf.

Added appropriate LICENSE, MODULE_LICENSE_APACHE2, and NOTICE files
as part of folding into internal master.

Bug: 77287124
Test: CTS audio/media
Change-Id: I3c8d124033f967b29d6e384cce5c843ee17a7bb1

1 files changed, 49 insertions, 0 deletions

diff --git a/decoder/ixheaacd_tns_usac.h b/decoder/ixheaacd_tns_usac.h
new file mode 100644
index 0000000..daf18b0
--- /dev/null
+++ b/decoder/ixheaacd_tns_usac.h
@@ -0,0 +1,49 @@
+/******************************************************************************
+ *                                                                            *
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *****************************************************************************
+ * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
+*/
+#ifndef IXHEAACD_TNS_USAC_H
+#define IXHEAACD_TNS_USAC_H
+
+#define TNS_MAX_BANDS 49
+#define TNS_MAX_ORDER 31
+#define TNS_MAX_WIN 8
+#define TNS_MAX_FILT 3
+
+typedef struct {
+  WORD32 start_band;
+  WORD32 stop_band;
+  WORD32 order;
+  WORD32 direction;
+  WORD32 coef_compress;
+  WORD16 coef[TNS_MAX_ORDER];
+
+} ia_tns_filter_struct;
+
+typedef struct {
+  WORD32 n_filt;
+  WORD32 coef_res;
+  ia_tns_filter_struct str_filter[TNS_MAX_FILT];
+} ia_tns_info_struct;
+
+typedef struct {
+  WORD32 n_subblocks;
+  ia_tns_info_struct str_tns_info[TNS_MAX_WIN];
+} ia_tns_frame_info_struct;
+
+#endif /* IXHEAACD_TNS_USAC_H */