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, 281 insertions, 0 deletions

diff --git a/decoder/ixheaacd_bitbuffer.c b/decoder/ixheaacd_bitbuffer.c
new file mode 100644
index 0000000..847815f
--- /dev/null
+++ b/decoder/ixheaacd_bitbuffer.c
@@ -0,0 +1,281 @@
+/******************************************************************************
+ *                                                                            *
+ * 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_basic_op.h>
+#include "ixheaacd_intrinsics.h"
+#include "ixheaacd_bitbuffer.h"
+
+#include "ixheaacd_adts_crc_check.h"
+
+VOID ixheaacd_byte_align(ia_bit_buf_struct *it_bit_buff,
+                         WORD32 *align_bits_cnt) {
+  WORD alignment;
+  alignment = (WORD)((*align_bits_cnt - it_bit_buff->cnt_bits) & 0x07);
+
+  if (alignment) {
+    ixheaacd_read_bits_buf(it_bit_buff, (8 - alignment));
+  }
+
+  *align_bits_cnt = it_bit_buff->cnt_bits;
+}
+
+WORD32 ixheaacd_show_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
+  UWORD32 ret_val;
+  UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
+  WORD bit_pos = it_bit_buff->bit_pos;
+
+  ret_val = (UWORD32)*ptr_read_next;
+
+  bit_pos -= no_of_bits;
+  while (bit_pos < 0) {
+    bit_pos += 8;
+    ptr_read_next++;
+
+    if (ptr_read_next > it_bit_buff->ptr_bit_buf_end) {
+      ptr_read_next = it_bit_buff->ptr_bit_buf_base;
+    }
+
+    ret_val <<= 8;
+
+    ret_val |= (UWORD32)*ptr_read_next;
+  }
+
+  ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
+
+  return ret_val;
+}
+
+WORD32 ixheaacd_read_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
+  UWORD32 ret_val;
+  UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
+  WORD bit_pos = it_bit_buff->bit_pos;
+
+  if (no_of_bits == 0) {
+    return 0;
+  }
+
+  it_bit_buff->cnt_bits -= no_of_bits;
+  ret_val = (UWORD32)*ptr_read_next;
+
+  bit_pos -= no_of_bits;
+  while (bit_pos < 0) {
+    bit_pos += 8;
+    ptr_read_next++;
+
+    if (ptr_read_next > it_bit_buff->ptr_bit_buf_end) {
+      ptr_read_next = it_bit_buff->ptr_bit_buf_base;
+    }
+
+    ret_val <<= 8;
+
+    ret_val |= (UWORD32)*ptr_read_next;
+  }
+
+  ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
+  it_bit_buff->ptr_read_next = ptr_read_next;
+  it_bit_buff->bit_pos = (WORD16)bit_pos;
+  return ret_val;
+}
+
+UWORD32 ixheaacd_aac_read_byte(UWORD8 **ptr_read_next, WORD32 *bit_pos,
+                               WORD32 *readword) {
+  UWORD8 *v = *ptr_read_next;
+  WORD32 bits_consumed = *bit_pos;
+
+  if ((bits_consumed -= 8) >= 0) {
+    *readword = (*readword << 8) | *v;
+    v++;
+  } else {
+    bits_consumed += 8;
+  }
+  *bit_pos = bits_consumed;
+  *ptr_read_next = v;
+  return 1;
+}
+
+UWORD32 ixheaacd_aac_read_2bytes(UWORD8 **ptr_read_next, WORD32 *bit_pos,
+                                 WORD32 *readword) {
+  UWORD8 *v = *ptr_read_next;
+  WORD32 bits_consumed = *bit_pos;
+
+  if ((bits_consumed - 16) >= 0) {
+    *readword = (*readword << 8) | *v;
+    v++;
+    *readword = (*readword << 8) | *v;
+    v++;
+    bits_consumed -= 16;
+
+  } else if ((bits_consumed - 8) >= 0) {
+    *readword = (*readword << 8) | *v;
+    v++;
+    bits_consumed -= 8;
+  }
+
+  *bit_pos = bits_consumed;
+  *ptr_read_next = v;
+  return 1;
+}
+
+UWORD32 ixheaacd_aac_read_byte_corr1(UWORD8 **ptr_read_next,
+                                     WORD16 *ptr_bit_pos, WORD32 *readword) {
+  UWORD8 *v = *ptr_read_next;
+  WORD16 bits_consumed = *ptr_bit_pos;
+
+  while (bits_consumed >= 8) {
+    if ((bits_consumed -= 8) >= 0) {
+      {
+        *readword = (*readword << 8) | *v;
+        v++;
+      }
+    } else {
+      bits_consumed += 8;
+    }
+  }
+  *ptr_bit_pos = bits_consumed;
+  *ptr_read_next = v;
+  return 1;
+}
+
+UWORD32 ixheaacd_aac_read_byte_corr(UWORD8 **ptr_read_next, WORD32 *ptr_bit_pos,
+                                    WORD32 *readword, UWORD8 *p_bit_buf_end) {
+  UWORD8 *v = *ptr_read_next;
+  WORD32 bits_consumed = *ptr_bit_pos;
+
+  if ((bits_consumed -= 8) >= 0) {
+    if (p_bit_buf_end < v)
+      bits_consumed += 8;
+    else {
+      *readword = (*readword << 8) | *v;
+      v++;
+    }
+  } else {
+    bits_consumed += 8;
+  }
+  *ptr_bit_pos = bits_consumed;
+  *ptr_read_next = v;
+  return 1;
+}
+
+WORD32 ixheaacd_aac_read_bit(ia_bit_buf_struct *it_bit_buff) {
+  UWORD8 ret_val;
+  UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
+  WORD bit_pos = it_bit_buff->bit_pos;
+  UWORD32 temp;
+  WORD no_of_bits = 1;
+
+  if (bit_pos < 0) {
+    bit_pos = 7;
+    ptr_read_next--;
+  }
+
+  it_bit_buff->cnt_bits += no_of_bits;
+  ret_val = *ptr_read_next;
+  bit_pos -= no_of_bits;
+
+  temp = (ret_val << 24) << (bit_pos + no_of_bits);
+  it_bit_buff->ptr_read_next = ptr_read_next;
+  it_bit_buff->bit_pos = (WORD16)bit_pos;
+
+  return temp >> (32 - no_of_bits);
+}
+
+WORD32 ixheaacd_aac_read_bit_rev(ia_bit_buf_struct *it_bit_buff) {
+  UWORD8 ret_val;
+  UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
+  WORD bit_pos = it_bit_buff->bit_pos;
+  UWORD32 temp;
+  WORD no_of_bits = 1;
+
+  if (bit_pos >= 8) {
+    bit_pos -= 8;
+    ptr_read_next++;
+  }
+
+  it_bit_buff->cnt_bits -= no_of_bits;
+  ret_val = *ptr_read_next;
+  bit_pos += no_of_bits;
+
+  temp = (ret_val << 24) << (bit_pos - no_of_bits);
+  it_bit_buff->ptr_read_next = ptr_read_next;
+  it_bit_buff->bit_pos = (WORD16)bit_pos;
+
+  return temp >> (32 - no_of_bits);
+}
+
+VOID ixheaacd_write_bit(ia_bit_buf_struct *it_bit_buff, WORD32 value,
+                        WORD32 no_of_bits)
+
+{
+  WORD32 mask;
+
+  if (no_of_bits == 0) return;
+
+  mask = 0x1;
+  mask <<= no_of_bits - 1;
+
+  it_bit_buff->bit_count += no_of_bits;
+
+  while (no_of_bits > 0) {
+    while (no_of_bits > 0 && it_bit_buff->valid_bits < 8) {
+      it_bit_buff->byte <<= 1;
+      if (value & mask) it_bit_buff->byte |= 0x1;
+      value <<= 1;
+      no_of_bits--;
+      it_bit_buff->valid_bits++;
+    }
+    if (it_bit_buff->valid_bits == 8) {
+      *it_bit_buff->byte_ptr++ = it_bit_buff->byte;
+      it_bit_buff->byte = 0;
+      it_bit_buff->valid_bits = 0;
+    }
+  }
+}
+
+WORD32 ixheaacd_read_bit(ia_bit_buf_struct *it_bit_buff, WORD32 no_of_bits) {
+  UWORD32 ret_val;
+  UWORD8 *ptr_read_next = it_bit_buff->byte_ptr;
+
+  if (no_of_bits == 0) {
+    return 0;
+  }
+
+  ret_val = ixheaacd_aac_showbits_32(ptr_read_next);
+  it_bit_buff->byte_ptr += (no_of_bits >> 3);
+
+  if (it_bit_buff->valid_bits != 8) {
+    UWORD8 *v = it_bit_buff->byte_ptr;
+    ret_val = (ret_val << (8 - it_bit_buff->valid_bits)) |
+              (*v >> it_bit_buff->valid_bits);
+  }
+
+  it_bit_buff->valid_bits -= (no_of_bits % 8);
+
+  ret_val = ret_val >> (32 - no_of_bits);
+
+  return ret_val;
+}