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, 204 insertions, 0 deletions

diff --git a/decoder/ixheaacd_stereo.c b/decoder/ixheaacd_stereo.c
new file mode 100644
index 0000000..ac0f313
--- /dev/null
+++ b/decoder/ixheaacd_stereo.c
@@ -0,0 +1,204 @@
+/******************************************************************************
+ *                                                                            *
+ * 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
+*/
+#include "ixheaacd_sbr_common.h"
+#include <ixheaacd_type_def.h>
+
+#include "ixheaacd_constants.h"
+#include <ixheaacd_basic_ops32.h>
+#include <ixheaacd_basic_ops16.h>
+#include <ixheaacd_basic_ops40.h>
+#include "ixheaacd_basic_ops.h"
+
+#include "ixheaacd_defines.h"
+#include <ixheaacd_aac_rom.h>
+#include "ixheaacd_bitbuffer.h"
+#include "ixheaacd_common_rom.h"
+#include "ixheaacd_basic_funcs.h"
+
+#include <ixheaacd_basic_op.h>
+#include "ixheaacd_intrinsics.h"
+
+#include "ixheaacd_pulsedata.h"
+
+#include "ixheaacd_pns.h"
+#include "ixheaacd_drc_data_struct.h"
+
+#include "ixheaacd_lt_predict.h"
+#include "ixheaacd_channelinfo.h"
+#include "ixheaacd_channel.h"
+#include "ixheaacd_drc_dec.h"
+#include "ixheaacd_audioobjtypes.h"
+
+#include "ixheaacd_stereo.h"
+
+VOID ixheaacd_ms_stereo_process(
+    ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[2],
+    ia_aac_dec_tables_struct *ptr_aac_tables)
+
+{
+  WORD32 win_grp, grp_len, k;
+  WORD32 *l_spec = ptr_aac_dec_channel_info[LEFT]->ptr_spec_coeff;
+  WORD32 *r_spec = ptr_aac_dec_channel_info[RIGHT]->ptr_spec_coeff;
+  WORD8 *ptr_group_len =
+      ptr_aac_dec_channel_info[LEFT]->str_ics_info.window_group_length;
+  const WORD8 *ptr_sfb_width =
+      ptr_aac_tables
+          ->str_aac_sfb_info[ptr_aac_dec_channel_info[RIGHT]
+                                 ->str_ics_info.window_sequence]
+          .sfb_width;
+
+  UWORD8 *ptr_ms_used =
+      &ptr_aac_dec_channel_info[LEFT]->pstr_stereo_info->ms_used[0][0];
+
+  for (win_grp = 0;
+       win_grp < ptr_aac_dec_channel_info[LEFT]->str_ics_info.num_window_groups;
+       win_grp++) {
+    for (grp_len = 0; grp_len < ptr_group_len[win_grp]; grp_len++) {
+      WORD32 sfb;
+      WORD32 ixheaacd_drc_offset = 0;
+
+      for (sfb = 0; sfb < ptr_aac_dec_channel_info[LEFT]->str_ics_info.max_sfb;
+           sfb++) {
+        ixheaacd_drc_offset += ptr_sfb_width[sfb];
+
+        if (*ptr_ms_used++) {
+          for (k = 0; k < ptr_sfb_width[sfb]; k = k + 2) {
+            WORD32 left_coef = *l_spec;
+            WORD32 right_coef = *r_spec;
+            WORD32 left_coef2 = *(l_spec + 1);
+            WORD32 right_coef2 = *(r_spec + 1);
+
+            *l_spec++ = ixheaacd_add32_sat(left_coef, right_coef);
+            *r_spec++ = ixheaacd_sub32_sat(left_coef, right_coef);
+            *l_spec++ = ixheaacd_add32_sat(left_coef2, right_coef2);
+            *r_spec++ = ixheaacd_sub32_sat(left_coef2, right_coef2);
+          }
+        } else {
+          l_spec += ptr_sfb_width[sfb];
+          r_spec += ptr_sfb_width[sfb];
+        }
+      }
+      ptr_ms_used -= ptr_aac_dec_channel_info[LEFT]->str_ics_info.max_sfb;
+      l_spec = l_spec + 128 - ixheaacd_drc_offset;
+      r_spec = r_spec + 128 - ixheaacd_drc_offset;
+    }
+
+    ptr_ms_used += JOINT_STEREO_MAX_BANDS;
+  }
+}
+
+static PLATFORM_INLINE WORD32 ixheaacd_mult32x16in32l(WORD32 a, WORD32 b) {
+  WORD32 result;
+  WORD64 temp_result;
+
+  temp_result = (WORD64)a * (WORD64)b;
+
+  result = (WORD32)(temp_result >> 16);
+
+  return (result);
+}
+
+VOID ixheaacd_intensity_stereo_process(
+    ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[2],
+    ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 object_type,
+    WORD32 aac_sf_data_resil_flag) {
+  UWORD8 *ptr_ms_used =
+      &ptr_aac_dec_channel_info[LEFT]->pstr_stereo_info->ms_used[0][0];
+  WORD8 *ptr_code_book = &ptr_aac_dec_channel_info[RIGHT]->ptr_code_book[0];
+  WORD16 *ptr_scale_factor =
+      &ptr_aac_dec_channel_info[RIGHT]->ptr_scale_factor[0];
+  WORD32 *r_spec = &ptr_aac_dec_channel_info[RIGHT]->ptr_spec_coeff[0];
+  WORD32 *l_spec = &ptr_aac_dec_channel_info[LEFT]->ptr_spec_coeff[0];
+  WORD8 *ptr_group_len =
+      ptr_aac_dec_channel_info[RIGHT]->str_ics_info.window_group_length;
+  const WORD8 *ptr_sfb_width =
+      ptr_aac_tables
+          ->str_aac_sfb_info[ptr_aac_dec_channel_info[RIGHT]
+                                 ->str_ics_info.window_sequence]
+          .sfb_width;
+  WORD32 *ptr_scale_table = ptr_aac_tables->pstr_block_tables->scale_table;
+  WORD32 win_grp, grp_len, k;
+
+  for (win_grp = 0;
+       win_grp <
+       ptr_aac_dec_channel_info[RIGHT]->str_ics_info.num_window_groups;
+       win_grp++) {
+    for (grp_len = 0; grp_len < ptr_group_len[win_grp]; grp_len++) {
+      WORD32 sfb;
+      WORD32 ixheaacd_drc_offset = 0;
+
+      for (sfb = 0; sfb < ptr_aac_dec_channel_info[RIGHT]->str_ics_info.max_sfb;
+           sfb++) {
+        WORD8 code_book = ptr_code_book[sfb];
+        ixheaacd_drc_offset += ptr_sfb_width[sfb];
+
+        if (((code_book >= INTENSITY_HCB2) &&
+             ((object_type != AOT_ER_AAC_ELD) &&
+              (object_type != AOT_ER_AAC_LD))) ||
+            (((code_book == INTENSITY_HCB2) || (code_book == INTENSITY_HCB)) &&
+             ((object_type == AOT_ER_AAC_ELD) ||
+              (object_type == AOT_ER_AAC_LD))))
+
+        {
+          WORD32 sfb_factor, scale;
+          WORD32 scf_exp;
+
+          sfb_factor = (ptr_scale_factor[sfb]);
+          if (aac_sf_data_resil_flag) sfb_factor = -sfb_factor;
+
+          scf_exp = (sfb_factor >> 2);
+          scale = *(ptr_scale_table + (sfb_factor & 3));
+          if (!((ptr_ms_used[sfb]) ^ (code_book & 0x1))) {
+            scale = ixheaacd_negate32(scale);
+          }
+
+          scf_exp = -(scf_exp + 2);
+
+          for (k = 0; k < ptr_sfb_width[sfb]; k++) {
+            WORD32 temp, shift_val;
+            temp = *l_spec++;
+
+            shift_val = ixheaacd_norm32(temp);
+            temp = ixheaacd_shl32(temp, shift_val);
+
+            temp = ixheaacd_mult32x16in32l(temp, scale);
+            shift_val = shift_val + scf_exp;
+
+            if (shift_val < 0) {
+              temp = ixheaacd_shl32_sat(temp, -shift_val);
+            } else {
+              temp = ixheaacd_shr32(temp, shift_val);
+            }
+            *r_spec++ = temp;
+          }
+
+        } else {
+          l_spec += ptr_sfb_width[sfb];
+          r_spec += ptr_sfb_width[sfb];
+        }
+      }
+      l_spec += 128 - ixheaacd_drc_offset;
+      r_spec += 128 - ixheaacd_drc_offset;
+    }
+    ptr_ms_used += 64;
+    ptr_code_book += 16;
+    ptr_scale_factor += 16;
+  }
+}