Combined Workspace for Encoder and Decoder (#33)

* Combined Workspace for Encoder and Decoder

* Addressed review comments and some minor edits

---------

Co-authored-by: Divya B M <100655@ittiam.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/encoder/ixheaace_aac_constants.h b/encoder/ixheaace_aac_constants.h
new file mode 100644
index 0000000..e4590c1
--- /dev/null
+++ b/encoder/ixheaace_aac_constants.h
@@ -0,0 +1,90 @@
+/******************************************************************************
+ *                                                                            *
+ * Copyright (C) 2023 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
+ */
+
+#pragma once
+// FLOAT values
+#define IXHEAACE_COS_PI_BY_4 (0.70709228515625f)      // 0.7071067812f
+#define IXHEAACE_COS_PI_BY_8 (0.92388916015625f)      // 0.923879532511287f
+#define IXHEAACE_SIN_PI_BY_8 (0.3826904296875f)       // 0.382683432365090f
+#define IXHEAACE_COS_PI_BY_16 (0.98077392578125f)     // 0.980785280403230f
+#define IXHEAACE_SIN_PI_BY_16 (0.195098876953125f)    // 0.195090322016128f
+#define IXHEAACE_COS_3_PI_BY_16 (0.83148193359375f)   // 0.831469612302545f
+#define IXHEAACE_SIN_3_PI_BY_16 (0.555572509765625f)  // 0.555570233019602f
+#define IXHEAACE_INV_SQRT2 (7.071067811865475e-1f)
+#define IXHEAACE_COS_PI_DIV8 (0.923879532511287f)
+#define IXHEAACE_COS_3PI_DIV8 (3.826834323650898e-1f)
+#define IXHEAACE_SQRT2PLUS1 (2.414213562373095f)
+#define IXHEAACE_SQRT2MINUS1 (4.142135623730952e-1f)
+
+#define INV_SQRT_2_FLOAT 0x3F3504F3  // 1/sqrt(2) in float
+
+#define Q_POWER2_TABLE 30
+
+#define DIV_FAC_24_BIT_PCM (256.0f)
+#define DIV_FAC_32_BIT_PCM (65536.0f)
+
+#define AOT_AAC_LC (2)
+#define AOT_SBR (5)
+#define AOT_AAC_LD (23)
+#define AOT_AAC_ELD (39)
+#define AOT_USAC (42)
+#define AOT_PS (29)
+
+#define AUDIO_PROFILE_AAC_LC_L5 (0x2B)
+#define AUDIO_PROFILE_HEAAC_L5 (0x2F)
+#define AUDIO_PROFILE_HEAAC_V2_L5 (0x33)
+#define AUDIO_PROFILE_AAC_LD_L4 (0x19)
+#define AUDIO_PROFILE_AAC_ELD_L1 (0x4C)
+#define AUDIO_PROFILE_AAC_ELD_L2 (0x4D)
+#define AUDIO_PROFILE_AAC_ELD_L4 (0x4F)
+#define AUDIO_PROFILE_USAC_L2 (0x45)
+#define AUDIO_PROFILE_NOT_SPECIFIED (0xFE)
+
+#define CLIP_SAVE_LO_LONG (0.2f)
+#define CLIP_SAVE_HI_LONG (0.95f)
+#define MIN_BITS_SAVE_LONG (-0.05f)
+#define MAX_BITS_SAVE_LONG (0.3f)
+#define CLIP_SPEND_LO_LONG (0.2f)
+#define CLIP_SPEND_HI_LONG (0.95f)
+#define MIN_BITS_SPEND_LONG (-0.10f)
+#define MAX_BITS_SPEND_LONG (0.4f)
+#define CLIP_SAVE_LO_SHORT (0.2f)
+#define CLIP_SAVE_HI_SHORT (0.75f)
+#define MIN_BITS_SAVE_SHORT (0.0f)
+#define MAX_BITS_SAVE_SHORT (0.2f)
+#define CLIP_SPEND_LO_SHORT (0.2f)
+#define CLIP_SPEND_HI_SHORT (0.75f)
+#define MIN_BITS_SPEND_SHORT (-0.05f)
+#define MAX_BITS_SPEND_SHORT (0.5f)
+typedef struct {
+  FLOAT32 re;
+  FLOAT32 im;
+} complex;
+
+typedef struct {
+  UWORD8 *data;       /* data bits */
+  WORD32 num_bit;     /* number of bits in buffer */
+  WORD32 size;        /* buffer size in bytes */
+  WORD32 current_bit; /* current bit position in bit stream */
+  WORD32 numByte;     /* number of bytes read/written (only file) */
+} ixheaace_bitstream_params;
+
+/* bits in byte (char) */
+#define BYTE_NUMBIT 8
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