Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 174 insertions, 0 deletions

diff --git a/libMpegTPDec/src/tpdec_adts.h b/libMpegTPDec/src/tpdec_adts.h
new file mode 100644
index 0000000..13c66a4
--- /dev/null
+++ b/libMpegTPDec/src/tpdec_adts.h
@@ -0,0 +1,174 @@
+/*****************************  MPEG-4 AAC Decoder  **************************
+
+                        (C) Copyright Fraunhofer IIS (2004)
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    You may use this software and/or program only under the terms and
+    conditions described in the above mentioned Fraunhofer IIS Software
+    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+   $Id$
+   Author(s):   Josef Hoepfl
+   Description: ADTS interface
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+******************************************************************************/
+
+#ifndef TPDEC_ADTS_H
+#define TPDEC_ADTS_H
+
+#include "tpdec_lib.h"
+
+
+#define ADTS_SYNCWORD               ( 0xfff )
+#define ADTS_SYNCLENGTH             ( 12 )     /* in bits */
+#define ADTS_HEADERLENGTH           ( 56 )     /* minimum header size in bits */
+#define ADTS_FIXED_HEADERLENGTH     ( 28 )     /* in bits */
+#define ADTS_VARIABLE_HEADERLENGTH  ( ADTS_HEADERLENGTH - ADTS_FIXED_HEADERLENGTH )
+
+#ifdef CHECK_TWO_SYNCS
+ #define ADTS_MIN_TP_BUF_SIZE       ( 8191 + 2 )
+#else
+ #define ADTS_MIN_TP_BUF_SIZE       ( 8191 )
+#endif
+
+#include "FDK_crc.h"
+
+typedef struct {
+  /* ADTS header fields */
+  UCHAR mpeg_id;
+  UCHAR layer;
+  UCHAR protection_absent;
+  UCHAR profile;
+  UCHAR sample_freq_index;
+  UCHAR private_bit;
+  UCHAR channel_config;
+  UCHAR original;
+  UCHAR home;
+  UCHAR copyright_id;
+  UCHAR copyright_start;
+  USHORT frame_length;
+  USHORT adts_fullness;
+  UCHAR num_raw_blocks;
+  UCHAR num_pce_bits;
+} STRUCT_ADTS_BS;
+
+struct STRUCT_ADTS {
+
+  STRUCT_ADTS_BS bs;
+
+  UCHAR decoderCanDoMpeg4;
+  UCHAR BufferFullnesStartFlag;
+
+  FDK_CRCINFO crcInfo;             /* CRC state info */
+  USHORT      crcReadValue;        /* CRC value read from bitstream data */
+  USHORT      rawDataBlockDist[4]; /* distance between each raw data block. Not the same as found in the bitstream */
+} ;
+
+typedef struct STRUCT_ADTS *HANDLE_ADTS;
+
+/*!
+  \brief Initialize ADTS CRC
+
+  The function initialzes the crc buffer and the crc lookup table.
+
+  \return  none
+*/
+void adtsRead_CrcInit( HANDLE_ADTS pAdts );
+
+/**
+ * \brief Starts CRC region with a maximum number of bits
+ *        If mBits is positive zero padding will be used for CRC calculation, if there
+ *        are less than mBits bits available.
+ *        If mBits is negative no zero padding is done.
+ *        If mBits is zero the memory for the buffer is allocated dynamically, the
+ *        number of bits is not limited.
+ *
+ * \param pAdts ADTS data handle
+ * \param hBs bitstream handle, on which the CRC region referes to
+ * \param mBits max number of bits in crc region to be considered
+ *
+ * \return  ID for the created region, -1 in case of an error
+ */
+int adtsRead_CrcStartReg(
+        HANDLE_ADTS pAdts,
+        HANDLE_FDK_BITSTREAM hBs,
+        int mBits
+        );
+
+/**
+ * \brief Ends CRC region identified by reg
+ *
+ * \param pAdts ADTS data handle
+ * \param hBs bitstream handle, on which the CRC region referes to
+ * \param reg CRC regions ID returned by adtsRead_CrcStartReg()
+ *
+ * \return  none
+ */
+void adtsRead_CrcEndReg(
+        HANDLE_ADTS pAdts,
+        HANDLE_FDK_BITSTREAM hBs,
+        int reg
+        );
+
+/**
+ * \brief Check CRC
+ *
+ * Checks if the currently calculated CRC matches the CRC field read from the bitstream
+ * Deletes all CRC regions.
+ *
+ * \param pAdts ADTS data handle
+ *
+ * \return Returns 0 if they are identical otherwise 1
+ */
+TRANSPORTDEC_ERROR adtsRead_CrcCheck( HANDLE_ADTS pAdts );
+
+
+/**
+ * \brief Check if we have a valid ADTS frame at the current bitbuffer position
+ *
+ * This function assumes enough bits in buffer for the current frame.
+ * It reads out the header bits to prepare the bitbuffer for the decode loop.
+ * In case the header bits show an invalid bitstream/frame, the whole frame is skipped.
+ *
+ * \param pAdts ADTS data handle which is filled with parsed ADTS header data
+ * \param bs handle of bitstream from whom the ADTS header is read
+ *
+ * \return  error status
+ */
+TRANSPORTDEC_ERROR adtsRead_DecodeHeader(
+        HANDLE_ADTS           pAdts,
+        CSAudioSpecificConfig *pAsc,
+        HANDLE_FDK_BITSTREAM  bs,
+        const INT             ignoreBufferFullness
+        );
+
+/**
+ * \brief Get the raw data block length of the given block number.
+ *
+ * \param pAdts ADTS data handle
+ * \param blockNum current raw data block index
+ * \param pLength pointer to an INT where the length of the given raw data block is stored into
+ *                the returned value might be -1, in which case the raw data block length is unknown.
+ *
+ * \return  error status
+ */
+int adtsRead_GetRawDataBlockLength(
+        HANDLE_ADTS pAdts,
+        INT         blockNum
+        );
+
+
+#endif /* TPDEC_ADTS_H */