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diff --git a/fdk-aac/libFDK/src/FDK_crc.cpp b/fdk-aac/libFDK/src/FDK_crc.cpp
new file mode 100644
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+++ b/fdk-aac/libFDK/src/FDK_crc.cpp
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+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/******************* Library for basic calculation routines ********************
+
+   Author(s):
+
+   Description: CRC calculation
+
+*******************************************************************************/
+
+#include "FDK_crc.h"
+
+/*---------------- constants -----------------------*/
+
+/**
+ * \brief  This table defines precalculated lookup tables for crc polynom  x^16
+ * + x^15 + x^2 + x^0.
+ */
+static const USHORT crcLookup_16_15_2_0[256] = {
+    0x0000, 0x8005, 0x800f, 0x000a, 0x801b, 0x001e, 0x0014, 0x8011, 0x8033,
+    0x0036, 0x003c, 0x8039, 0x0028, 0x802d, 0x8027, 0x0022, 0x8063, 0x0066,
+    0x006c, 0x8069, 0x0078, 0x807d, 0x8077, 0x0072, 0x0050, 0x8055, 0x805f,
+    0x005a, 0x804b, 0x004e, 0x0044, 0x8041, 0x80c3, 0x00c6, 0x00cc, 0x80c9,
+    0x00d8, 0x80dd, 0x80d7, 0x00d2, 0x00f0, 0x80f5, 0x80ff, 0x00fa, 0x80eb,
+    0x00ee, 0x00e4, 0x80e1, 0x00a0, 0x80a5, 0x80af, 0x00aa, 0x80bb, 0x00be,
+    0x00b4, 0x80b1, 0x8093, 0x0096, 0x009c, 0x8099, 0x0088, 0x808d, 0x8087,
+    0x0082, 0x8183, 0x0186, 0x018c, 0x8189, 0x0198, 0x819d, 0x8197, 0x0192,
+    0x01b0, 0x81b5, 0x81bf, 0x01ba, 0x81ab, 0x01ae, 0x01a4, 0x81a1, 0x01e0,
+    0x81e5, 0x81ef, 0x01ea, 0x81fb, 0x01fe, 0x01f4, 0x81f1, 0x81d3, 0x01d6,
+    0x01dc, 0x81d9, 0x01c8, 0x81cd, 0x81c7, 0x01c2, 0x0140, 0x8145, 0x814f,
+    0x014a, 0x815b, 0x015e, 0x0154, 0x8151, 0x8173, 0x0176, 0x017c, 0x8179,
+    0x0168, 0x816d, 0x8167, 0x0162, 0x8123, 0x0126, 0x012c, 0x8129, 0x0138,
+    0x813d, 0x8137, 0x0132, 0x0110, 0x8115, 0x811f, 0x011a, 0x810b, 0x010e,
+    0x0104, 0x8101, 0x8303, 0x0306, 0x030c, 0x8309, 0x0318, 0x831d, 0x8317,
+    0x0312, 0x0330, 0x8335, 0x833f, 0x033a, 0x832b, 0x032e, 0x0324, 0x8321,
+    0x0360, 0x8365, 0x836f, 0x036a, 0x837b, 0x037e, 0x0374, 0x8371, 0x8353,
+    0x0356, 0x035c, 0x8359, 0x0348, 0x834d, 0x8347, 0x0342, 0x03c0, 0x83c5,
+    0x83cf, 0x03ca, 0x83db, 0x03de, 0x03d4, 0x83d1, 0x83f3, 0x03f6, 0x03fc,
+    0x83f9, 0x03e8, 0x83ed, 0x83e7, 0x03e2, 0x83a3, 0x03a6, 0x03ac, 0x83a9,
+    0x03b8, 0x83bd, 0x83b7, 0x03b2, 0x0390, 0x8395, 0x839f, 0x039a, 0x838b,
+    0x038e, 0x0384, 0x8381, 0x0280, 0x8285, 0x828f, 0x028a, 0x829b, 0x029e,
+    0x0294, 0x8291, 0x82b3, 0x02b6, 0x02bc, 0x82b9, 0x02a8, 0x82ad, 0x82a7,
+    0x02a2, 0x82e3, 0x02e6, 0x02ec, 0x82e9, 0x02f8, 0x82fd, 0x82f7, 0x02f2,
+    0x02d0, 0x82d5, 0x82df, 0x02da, 0x82cb, 0x02ce, 0x02c4, 0x82c1, 0x8243,
+    0x0246, 0x024c, 0x8249, 0x0258, 0x825d, 0x8257, 0x0252, 0x0270, 0x8275,
+    0x827f, 0x027a, 0x826b, 0x026e, 0x0264, 0x8261, 0x0220, 0x8225, 0x822f,
+    0x022a, 0x823b, 0x023e, 0x0234, 0x8231, 0x8213, 0x0216, 0x021c, 0x8219,
+    0x0208, 0x820d, 0x8207, 0x0202};
+
+/**
+ * \brief  This table defines precalculated lookup tables for crc polynom  x^16
+ * + x^12 + x^5 + x^0.
+ */
+static const USHORT crcLookup_16_12_5_0[256] = {
+    0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108,
+    0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, 0x1231, 0x0210,
+    0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, 0x9339, 0x8318, 0xb37b,
+    0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de, 0x2462, 0x3443, 0x0420, 0x1401,
+    0x64e6, 0x74c7, 0x44a4, 0x5485, 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee,
+    0xf5cf, 0xc5ac, 0xd58d, 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6,
+    0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d,
+    0xc7bc, 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
+    0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b, 0x5af5,
+    0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, 0xdbfd, 0xcbdc,
+    0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a, 0x6ca6, 0x7c87, 0x4ce4,
+    0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41, 0xedae, 0xfd8f, 0xcdec, 0xddcd,
+    0xad2a, 0xbd0b, 0x8d68, 0x9d49, 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13,
+    0x2e32, 0x1e51, 0x0e70, 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a,
+    0x9f59, 0x8f78, 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e,
+    0xe16f, 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
+    0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, 0x02b1,
+    0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256, 0xb5ea, 0xa5cb,
+    0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, 0x34e2, 0x24c3, 0x14a0,
+    0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xa7db, 0xb7fa, 0x8799, 0x97b8,
+    0xe75f, 0xf77e, 0xc71d, 0xd73c, 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657,
+    0x7676, 0x4615, 0x5634, 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9,
+    0xb98a, 0xa9ab, 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882,
+    0x28a3, 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
+    0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92, 0xfd2e,
+    0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, 0x7c26, 0x6c07,
+    0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1, 0xef1f, 0xff3e, 0xcf5d,
+    0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, 0x6e17, 0x7e36, 0x4e55, 0x5e74,
+    0x2e93, 0x3eb2, 0x0ed1, 0x1ef0};
+
+/**
+ * \brief  This table defines precalculated lookup tables for crc polynom   x^16 + x^14 + x^13 + x^12 + x^11 + x^5 + x^3 + x^2 + x^0.
+ */
+static const USHORT crcLookup_16_14_13_12_11_5_3_2_0[256] =
+{
+  0x0000, 0x782f, 0xf05e, 0x8871, 0x9893, 0xe0bc, 0x68cd, 0x10e2,
+  0x4909, 0x3126, 0xb957, 0xc178, 0xd19a, 0xa9b5, 0x21c4, 0x59eb,
+  0x9212, 0xea3d, 0x624c, 0x1a63, 0x0a81, 0x72ae, 0xfadf, 0x82f0,
+  0xdb1b, 0xa334, 0x2b45, 0x536a, 0x4388, 0x3ba7, 0xb3d6, 0xcbf9,
+  0x5c0b, 0x2424, 0xac55, 0xd47a, 0xc498, 0xbcb7, 0x34c6, 0x4ce9,
+  0x1502, 0x6d2d, 0xe55c, 0x9d73, 0x8d91, 0xf5be, 0x7dcf, 0x05e0,
+  0xce19, 0xb636, 0x3e47, 0x4668, 0x568a, 0x2ea5, 0xa6d4, 0xdefb,
+  0x8710, 0xff3f, 0x774e, 0x0f61, 0x1f83, 0x67ac, 0xefdd, 0x97f2,
+  0xb816, 0xc039, 0x4848, 0x3067, 0x2085, 0x58aa, 0xd0db, 0xa8f4,
+  0xf11f, 0x8930, 0x0141, 0x796e, 0x698c, 0x11a3, 0x99d2, 0xe1fd,
+  0x2a04, 0x522b, 0xda5a, 0xa275, 0xb297, 0xcab8, 0x42c9, 0x3ae6,
+  0x630d, 0x1b22, 0x9353, 0xeb7c, 0xfb9e, 0x83b1, 0x0bc0, 0x73ef,
+  0xe41d, 0x9c32, 0x1443, 0x6c6c, 0x7c8e, 0x04a1, 0x8cd0, 0xf4ff,
+  0xad14, 0xd53b, 0x5d4a, 0x2565, 0x3587, 0x4da8, 0xc5d9, 0xbdf6,
+  0x760f, 0x0e20, 0x8651, 0xfe7e, 0xee9c, 0x96b3, 0x1ec2, 0x66ed,
+  0x3f06, 0x4729, 0xcf58, 0xb777, 0xa795, 0xdfba, 0x57cb, 0x2fe4,
+  0x0803, 0x702c, 0xf85d, 0x8072, 0x9090, 0xe8bf, 0x60ce, 0x18e1,
+  0x410a, 0x3925, 0xb154, 0xc97b, 0xd999, 0xa1b6, 0x29c7, 0x51e8,
+  0x9a11, 0xe23e, 0x6a4f, 0x1260, 0x0282, 0x7aad, 0xf2dc, 0x8af3,
+  0xd318, 0xab37, 0x2346, 0x5b69, 0x4b8b, 0x33a4, 0xbbd5, 0xc3fa,
+  0x5408, 0x2c27, 0xa456, 0xdc79, 0xcc9b, 0xb4b4, 0x3cc5, 0x44ea,
+  0x1d01, 0x652e, 0xed5f, 0x9570, 0x8592, 0xfdbd, 0x75cc, 0x0de3,
+  0xc61a, 0xbe35, 0x3644, 0x4e6b, 0x5e89, 0x26a6, 0xaed7, 0xd6f8,
+  0x8f13, 0xf73c, 0x7f4d, 0x0762, 0x1780, 0x6faf, 0xe7de, 0x9ff1,
+  0xb015, 0xc83a, 0x404b, 0x3864, 0x2886, 0x50a9, 0xd8d8, 0xa0f7,
+  0xf91c, 0x8133, 0x0942, 0x716d, 0x618f, 0x19a0, 0x91d1, 0xe9fe,
+  0x2207, 0x5a28, 0xd259, 0xaa76, 0xba94, 0xc2bb, 0x4aca, 0x32e5,
+  0x6b0e, 0x1321, 0x9b50, 0xe37f, 0xf39d, 0x8bb2, 0x03c3, 0x7bec,
+  0xec1e, 0x9431, 0x1c40, 0x646f, 0x748d, 0x0ca2, 0x84d3, 0xfcfc,
+  0xa517, 0xdd38, 0x5549, 0x2d66, 0x3d84, 0x45ab, 0xcdda, 0xb5f5,
+  0x7e0c, 0x0623, 0x8e52, 0xf67d, 0xe69f, 0x9eb0, 0x16c1, 0x6eee,
+  0x3705, 0x4f2a, 0xc75b, 0xbf74, 0xaf96, 0xd7b9, 0x5fc8, 0x27e7,
+};
+
+/**
+ * \brief  This table defines precalculated lookup tables for crc polynom  x^16
+ * + x^15 + x^5 + x^0.
+ */
+static const USHORT crcLookup_16_15_5_0[256] = {
+    0x0000, 0x8021, 0x8063, 0x0042, 0x80e7, 0x00c6, 0x0084, 0x80a5, 0x81ef,
+    0x01ce, 0x018c, 0x81ad, 0x0108, 0x8129, 0x816b, 0x014a, 0x83ff, 0x03de,
+    0x039c, 0x83bd, 0x0318, 0x8339, 0x837b, 0x035a, 0x0210, 0x8231, 0x8273,
+    0x0252, 0x82f7, 0x02d6, 0x0294, 0x82b5, 0x87df, 0x07fe, 0x07bc, 0x879d,
+    0x0738, 0x8719, 0x875b, 0x077a, 0x0630, 0x8611, 0x8653, 0x0672, 0x86d7,
+    0x06f6, 0x06b4, 0x8695, 0x0420, 0x8401, 0x8443, 0x0462, 0x84c7, 0x04e6,
+    0x04a4, 0x8485, 0x85cf, 0x05ee, 0x05ac, 0x858d, 0x0528, 0x8509, 0x854b,
+    0x056a, 0x8f9f, 0x0fbe, 0x0ffc, 0x8fdd, 0x0f78, 0x8f59, 0x8f1b, 0x0f3a,
+    0x0e70, 0x8e51, 0x8e13, 0x0e32, 0x8e97, 0x0eb6, 0x0ef4, 0x8ed5, 0x0c60,
+    0x8c41, 0x8c03, 0x0c22, 0x8c87, 0x0ca6, 0x0ce4, 0x8cc5, 0x8d8f, 0x0dae,
+    0x0dec, 0x8dcd, 0x0d68, 0x8d49, 0x8d0b, 0x0d2a, 0x0840, 0x8861, 0x8823,
+    0x0802, 0x88a7, 0x0886, 0x08c4, 0x88e5, 0x89af, 0x098e, 0x09cc, 0x89ed,
+    0x0948, 0x8969, 0x892b, 0x090a, 0x8bbf, 0x0b9e, 0x0bdc, 0x8bfd, 0x0b58,
+    0x8b79, 0x8b3b, 0x0b1a, 0x0a50, 0x8a71, 0x8a33, 0x0a12, 0x8ab7, 0x0a96,
+    0x0ad4, 0x8af5, 0x9f1f, 0x1f3e, 0x1f7c, 0x9f5d, 0x1ff8, 0x9fd9, 0x9f9b,
+    0x1fba, 0x1ef0, 0x9ed1, 0x9e93, 0x1eb2, 0x9e17, 0x1e36, 0x1e74, 0x9e55,
+    0x1ce0, 0x9cc1, 0x9c83, 0x1ca2, 0x9c07, 0x1c26, 0x1c64, 0x9c45, 0x9d0f,
+    0x1d2e, 0x1d6c, 0x9d4d, 0x1de8, 0x9dc9, 0x9d8b, 0x1daa, 0x18c0, 0x98e1,
+    0x98a3, 0x1882, 0x9827, 0x1806, 0x1844, 0x9865, 0x992f, 0x190e, 0x194c,
+    0x996d, 0x19c8, 0x99e9, 0x99ab, 0x198a, 0x9b3f, 0x1b1e, 0x1b5c, 0x9b7d,
+    0x1bd8, 0x9bf9, 0x9bbb, 0x1b9a, 0x1ad0, 0x9af1, 0x9ab3, 0x1a92, 0x9a37,
+    0x1a16, 0x1a54, 0x9a75, 0x1080, 0x90a1, 0x90e3, 0x10c2, 0x9067, 0x1046,
+    0x1004, 0x9025, 0x916f, 0x114e, 0x110c, 0x912d, 0x1188, 0x91a9, 0x91eb,
+    0x11ca, 0x937f, 0x135e, 0x131c, 0x933d, 0x1398, 0x93b9, 0x93fb, 0x13da,
+    0x1290, 0x92b1, 0x92f3, 0x12d2, 0x9277, 0x1256, 0x1214, 0x9235, 0x975f,
+    0x177e, 0x173c, 0x971d, 0x17b8, 0x9799, 0x97db, 0x17fa, 0x16b0, 0x9691,
+    0x96d3, 0x16f2, 0x9657, 0x1676, 0x1634, 0x9615, 0x14a0, 0x9481, 0x94c3,
+    0x14e2, 0x9447, 0x1466, 0x1424, 0x9405, 0x954f, 0x156e, 0x152c, 0x950d,
+    0x15a8, 0x9589, 0x95cb, 0x15ea,
+};
+
+/*--------------- function declarations --------------------*/
+
+static inline INT calcCrc_Bits(USHORT *const pCrc, USHORT crcMask,
+                               USHORT crcPoly, HANDLE_FDK_BITSTREAM hBs,
+                               INT nBits);
+
+static inline INT calcCrc_Bytes(USHORT *const pCrc, const USHORT *pCrcLookup,
+                                HANDLE_FDK_BITSTREAM hBs, INT nBytes);
+
+static void crcCalc(HANDLE_FDK_CRCINFO hCrcInfo, HANDLE_FDK_BITSTREAM hBs,
+                    const INT reg);
+
+/*------------- function definitions ----------------*/
+
+void FDKcrcInit(HANDLE_FDK_CRCINFO hCrcInfo, const UINT crcPoly,
+                const UINT crcStartValue, const UINT crcLen) {
+  /* crc polynom example:
+  DAB+ FireCode:
+  x^16 + x^14 + x^13 + x^12 + x^11 + x^5 + x^3 + x^2 + x^0
+          (1) 0111 1000 0010 1101 -> 0x782d
+
+  x^16 + x^15 + x^5 + x^0        (1) 1000 0000 0010 0001 -> 0x8021
+  x^16 + x^15 + x^2 + x^0        (1) 1000 0000 0000 0101 -> 0x8005
+  x^16 + x^12 + x^5 + x^0        (1) 0001 0000 0010 0001 -> 0x1021
+  x^8 + x^4 + x^3 + x^2 + x^0              (1) 0001 1101 -> 0x001d */
+
+  hCrcInfo->crcLen = crcLen;
+  hCrcInfo->crcPoly = crcPoly;
+  hCrcInfo->startValue = crcStartValue;
+  hCrcInfo->crcMask = (crcLen) ? (1 << (crcLen - 1)) : 0;
+
+  FDKcrcReset(hCrcInfo);
+
+  hCrcInfo->pCrcLookup =
+      0; /* Preset 0 for "crcLen" != 16 or unknown 16-bit polynoms "crcPoly" */
+
+  if (hCrcInfo->crcLen == 16) {
+    switch (crcPoly) {
+      case 0x8021:
+        hCrcInfo->pCrcLookup = crcLookup_16_15_5_0;
+        break;
+      case 0x8005:
+        hCrcInfo->pCrcLookup = crcLookup_16_15_2_0;
+        break;
+      case 0x1021:
+        hCrcInfo->pCrcLookup = crcLookup_16_12_5_0;
+        break;
+      case 0x782d:
+        hCrcInfo->pCrcLookup = crcLookup_16_14_13_12_11_5_3_2_0;
+        break;
+      case 0x001d:
+      default:
+        /* no lookup table */
+        break;
+    }
+  }
+}
+
+void FDKcrcReset(HANDLE_FDK_CRCINFO hCrcInfo) {
+  int i;
+
+  hCrcInfo->crcValue = hCrcInfo->startValue;
+
+  for (i = 0; i < MAX_CRC_REGS; i++) {
+    hCrcInfo->crcRegData[i].isActive = 0;
+  }
+  hCrcInfo->regStart = 0;
+  hCrcInfo->regStop = 0;
+}
+
+INT FDKcrcStartReg(HANDLE_FDK_CRCINFO hCrcInfo, const HANDLE_FDK_BITSTREAM hBs,
+                   const INT mBits) {
+  int reg = hCrcInfo->regStart;
+
+  FDK_ASSERT(hCrcInfo->crcRegData[reg].isActive == 0);
+  hCrcInfo->crcRegData[reg].isActive = 1;
+  hCrcInfo->crcRegData[reg].maxBits = mBits;
+  hCrcInfo->crcRegData[reg].validBits = (INT)FDKgetValidBits(hBs);
+  hCrcInfo->crcRegData[reg].bitBufCntBits = 0;
+
+  hCrcInfo->regStart = (hCrcInfo->regStart + 1) % MAX_CRC_REGS;
+
+  return (reg);
+}
+
+INT FDKcrcEndReg(HANDLE_FDK_CRCINFO hCrcInfo, const HANDLE_FDK_BITSTREAM hBs,
+                 const INT reg) {
+  FDK_ASSERT((reg == (INT)hCrcInfo->regStop) &&
+             (hCrcInfo->crcRegData[reg].isActive == 1));
+
+  if (hBs->ConfigCache == BS_WRITER) {
+    hCrcInfo->crcRegData[reg].bitBufCntBits =
+        (INT)FDKgetValidBits(hBs) - hCrcInfo->crcRegData[reg].validBits;
+  } else {
+    hCrcInfo->crcRegData[reg].bitBufCntBits =
+        hCrcInfo->crcRegData[reg].validBits - (INT)FDKgetValidBits(hBs);
+  }
+
+  if (hCrcInfo->crcRegData[reg].maxBits == 0) {
+    hCrcInfo->crcRegData[reg].maxBits = hCrcInfo->crcRegData[reg].bitBufCntBits;
+  }
+
+  crcCalc(hCrcInfo, hBs, reg);
+
+  hCrcInfo->crcRegData[reg].isActive = 0;
+  hCrcInfo->regStop = (hCrcInfo->regStop + 1) % MAX_CRC_REGS;
+
+  return 0;
+}
+
+USHORT FDKcrcGetCRC(const HANDLE_FDK_CRCINFO hCrcInfo) {
+  return (hCrcInfo->crcValue & (((hCrcInfo->crcMask - 1) << 1) + 1));
+}
+
+/**
+ * \brief  Calculate crc bits.
+ *
+ * Calculate crc starting at current bitstream postion over nBits.
+ *
+ * \param pCrc                  Pointer to an outlying allocated crc info
+ * structure.
+ * \param crcMask               CrcMask in use.
+ * \param crcPoly               Crc polynom in use.
+ * \param hBs                   Handle to current bit buffer structure.
+ * \param nBits                 Number of processing bits.
+ *
+ * \return  Number of processed bits.
+ */
+static inline INT calcCrc_Bits(USHORT *const pCrc, USHORT crcMask,
+                               USHORT crcPoly, HANDLE_FDK_BITSTREAM hBs,
+                               INT nBits) {
+  int i;
+  USHORT crc = *pCrc; /* get crc value */
+
+  if (hBs != NULL) {
+    for (i = 0; (i < nBits); i++) {
+      USHORT tmp = FDKreadBit(hBs);  // process single bit
+      tmp ^= ((crc & crcMask) ? 1 : 0);
+      if (tmp != 0) tmp = crcPoly;
+      crc <<= 1;
+      crc ^= tmp;
+    }
+  } else {
+    for (i = 0; (i < nBits); i++) {
+      USHORT tmp = (crc & crcMask) ? crcPoly : 0;  // process single bit
+      crc <<= 1;
+      crc ^= tmp;
+    }
+  }
+  *pCrc = crc; /* update crc value */
+
+  return nBits;
+}
+
+/**
+ * \brief  Calculate crc bytes.
+ *
+ * Calculate crc starting at current bitstream postion over nBytes.
+ *
+ * \param pCrc                  Pointer to an outlying allocated crc info
+ * structure.
+ * \param pCrcLookup            Pointer to lookup table used for fast crc
+ * calculation.
+ * \param hBs                   Handle to current bit buffer structure.
+ * \param nBits                 Number of processing bytes.
+ *
+ * \return  Number of processed bits.
+ */
+
+static inline INT calcCrc_Bytes(USHORT *const pCrc, const USHORT *pCrcLookup,
+                                HANDLE_FDK_BITSTREAM hBs, INT nBytes) {
+  int i;
+  USHORT crc = *pCrc; /* get crc value */
+
+  if (hBs != NULL) {
+    ULONG data;
+    INT bits;
+    for (i = 0; i < (nBytes >> 2); i++) {
+      data = (ULONG)FDKreadBits(hBs, 32);
+      crc =
+          (crc << 8) ^ pCrcLookup[((crc >> 8) ^ ((USHORT)(data >> 24))) & 0xFF];
+      crc =
+          (crc << 8) ^ pCrcLookup[((crc >> 8) ^ ((USHORT)(data >> 16))) & 0xFF];
+      crc =
+          (crc << 8) ^ pCrcLookup[((crc >> 8) ^ ((USHORT)(data >> 8))) & 0xFF];
+      crc =
+          (crc << 8) ^ pCrcLookup[((crc >> 8) ^ ((USHORT)(data >> 0))) & 0xFF];
+    }
+    bits = (nBytes & 3) << 3;
+    if (bits > 0) {
+      data = (ULONG)FDKreadBits(hBs, bits);
+      for (bits -= 8; bits >= 0; bits -= 8)
+        crc = (crc << 8) ^
+              pCrcLookup[((crc >> 8) ^ (USHORT)(data >> bits)) & 0xFF];
+    }
+  } else {
+    for (i = 0; i < nBytes; i++) {
+      crc = (crc << 8) ^ pCrcLookup[(crc >> 8) & 0xFF];
+    }
+  }
+
+  *pCrc = crc; /* update crc value */
+  //fprintf(stderr, "\n\n crc[%d]=%04x\n", i, crc);
+
+  return (nBytes);
+}
+
+/**
+ * \brief  Calculate crc.
+ *
+ * Calculate crc. Lenght depends on mBits parameter in FDKcrcStartReg()
+ * configuration.
+ *
+ * \param hCrcInfo              Pointer to an outlying allocated crc info
+ * structure.
+ * \param hBs                   Pointer to current bit buffer structure.
+ * \param reg                   Crc region ID.
+ *
+ * \return  Number of processed bits.
+ */
+static void crcCalc(HANDLE_FDK_CRCINFO hCrcInfo, HANDLE_FDK_BITSTREAM hBs,
+                    const INT reg) {
+  USHORT crc = hCrcInfo->crcValue;
+  CCrcRegData *rD = &hCrcInfo->crcRegData[reg];
+  FDK_BITSTREAM bsReader;
+
+  if (hBs->ConfigCache == BS_READER) {
+    bsReader = *hBs;
+    FDKpushBiDirectional(&bsReader,
+                         -(rD->validBits - (INT)FDKgetValidBits(&bsReader)));
+  } else {
+    FDKinitBitStream(&bsReader, hBs->hBitBuf.Buffer, hBs->hBitBuf.bufSize,
+                     hBs->hBitBuf.ValidBits, BS_READER);
+    FDKpushBiDirectional(&bsReader, rD->validBits);
+  }
+
+  int bits, rBits;
+  rBits = (rD->maxBits >= 0) ? rD->maxBits : -rD->maxBits; /* ramaining bits */
+  if ((rD->maxBits > 0) && ((rD->bitBufCntBits >> 3 << 3) < rBits)) {
+    bits = rD->bitBufCntBits;
+  } else {
+    bits = rBits;
+  }
+
+  int words = bits >> 3;  /* processing bytes */
+  int mBits = bits & 0x7; /* modulo bits */
+
+  if (hCrcInfo->pCrcLookup) {
+    rBits -= (calcCrc_Bytes(&crc, hCrcInfo->pCrcLookup, &bsReader, words) << 3);
+  } else {
+    rBits -= calcCrc_Bits(&crc, hCrcInfo->crcMask, hCrcInfo->crcPoly, &bsReader,
+                          words << 3);
+  }
+
+  /* remaining valid bits*/
+  if (mBits != 0) {
+    rBits -= calcCrc_Bits(&crc, hCrcInfo->crcMask, hCrcInfo->crcPoly, &bsReader,
+                          mBits);
+  }
+
+  if (rBits != 0) {
+    /* zero bytes */
+    if ((hCrcInfo->pCrcLookup) && (rBits > 8)) {
+      rBits -=
+          (calcCrc_Bytes(&crc, hCrcInfo->pCrcLookup, NULL, rBits >> 3) << 3);
+    }
+    /* remaining zero bits */
+    if (rBits != 0) {
+      calcCrc_Bits(&crc, hCrcInfo->crcMask, hCrcInfo->crcPoly, NULL, rBits);
+    }
+  }
+
+  //fprintf(stderr, "\n\n crc=%04x\n", crc);
+  hCrcInfo->crcValue = crc;
+}