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+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2012 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
+----------------------------------------------------------------------------------------------------------- */
+
+/**********************  Fraunhofer IIS FDK AAC Encoder lib  ******************
+
+   Author(s): V. Bacigalupo
+   Description: Metadata Encoder library interface functions
+
+******************************************************************************/
+
+#ifndef _METADATA_MAIN_H
+#define _METADATA_MAIN_H
+
+
+/* Includes ******************************************************************/
+#include "aacenc_lib.h"
+#include "aacenc.h"
+
+
+/* Defines *******************************************************************/
+
+/* Data Types ****************************************************************/
+
+typedef enum {
+    METADATA_OK                    = 0x0000,   /*!< No error happened. All fine. */
+    METADATA_INVALID_HANDLE        = 0x0020,   /*!< Handle passed to function call was invalid. */
+    METADATA_MEMORY_ERROR          = 0x0021,   /*!< Memory allocation failed. */
+    METADATA_INIT_ERROR            = 0x0040,   /*!< General initialization error. */
+    METADATA_ENCODE_ERROR          = 0x0060    /*!< The encoding process was interrupted by an unexpected error. */
+
+} FDK_METADATA_ERROR;
+
+/**
+ *  Meta Data handle.
+ */
+typedef struct FDK_METADATA_ENCODER *HANDLE_FDK_METADATA_ENCODER;
+
+
+/**
+ * \brief  Open a Meta Data instance.
+ *
+ * \param phMetadataEnc         A pointer to a Meta Data handle to be allocated. Initialized on return.
+ *
+ * \return
+ *          - METADATA_OK, on succes.
+ *          - METADATA_INVALID_HANDLE, METADATA_MEMORY_ERROR, on failure.
+ */
+FDK_METADATA_ERROR FDK_MetadataEnc_Open(
+        HANDLE_FDK_METADATA_ENCODER     *phMetadataEnc
+        );
+
+
+/**
+ * \brief  Initialize a Meta Data instance.
+ *
+ * \param hMetadataEnc          Meta Data handle.
+ * \param resetStates           Indication for full reset of all states.
+ * \param metadataMode          Configures metat data output format (0,1,2).
+ * \param audioDelay            Delay cause by the audio encoder.
+ * \param frameLength           Number of samples to be processes within one frame.
+ * \param sampleRate            Sampling rat in Hz of audio input signal.
+ * \param nChannels             Number of audio input channels.
+ * \param channelMode           Channel configuration which is used by the encoder.
+ * \param channelOrder          Channel order of the input data. (WAV, MPEG)
+ *
+ * \return
+ *          - METADATA_OK, on succes.
+ *          - METADATA_INVALID_HANDLE, METADATA_INIT_ERROR, on failure.
+ */
+FDK_METADATA_ERROR FDK_MetadataEnc_Init(
+        HANDLE_FDK_METADATA_ENCODER      hMetadataEnc,
+        const INT                        resetStates,
+        const INT                        metadataMode,
+        const INT                        audioDelay,
+        const UINT                       frameLength,
+        const UINT                       sampleRate,
+        const UINT                       nChannels,
+        const CHANNEL_MODE               channelMode,
+        const CHANNEL_ORDER              channelOrder
+        );
+
+
+/**
+ * \brief  Calculate Meta Data processing.
+ *
+ * This function treats all step necessary for meta data processing.
+ * - Receive new meta data and make usable.
+ * - Calculate DRC compressor and extract meta data info.
+ * - Make meta data available for extern use.
+ * - Apply audio data and meta data delay compensation.
+ *
+ * \param hMetadataEnc          Meta Data handle.
+ * \param pAudioSamples         Pointer to audio input data. Existing function overwrites audio data with delayed audio samples.
+ * \param nAudioSamples         Number of input audio samples to be prcessed.
+ * \param pMetadata             Pointer to Metat Data input.
+ * \param ppMetaDataExtPayload  Pointer to extension payload array. Filled on return.
+ * \param nMetaDataExtensions   Pointer to variable to describe number of available extension payloads. Filled on return.
+ * \param matrix_mixdown_idx    Pointer to variable for matrix mixdown coefficient. Filled on return.
+ *
+ * \return
+ *          - METADATA_OK, on succes.
+ *          - METADATA_INVALID_HANDLE, METADATA_ENCODE_ERROR, on failure.
+ */
+FDK_METADATA_ERROR FDK_MetadataEnc_Process(
+        HANDLE_FDK_METADATA_ENCODER      hMetadataEnc,
+        INT_PCM * const                  pAudioSamples,
+        const INT                        nAudioSamples,
+        const AACENC_MetaData * const    pMetadata,
+        AACENC_EXT_PAYLOAD **            ppMetaDataExtPayload,
+        UINT *                           nMetaDataExtensions,
+        INT *                            matrix_mixdown_idx
+        );
+
+
+/**
+ * \brief  Close the Meta Data instance.
+ *
+ * Deallocate instance and free whole memory.
+ *
+ * \param phMetaData            Pointer to the Meta Data handle to be deallocated.
+ *
+ * \return
+ *          - METADATA_OK, on succes.
+ *          - METADATA_INVALID_HANDLE, on failure.
+ */
+FDK_METADATA_ERROR FDK_MetadataEnc_Close(
+        HANDLE_FDK_METADATA_ENCODER     *phMetaData
+        );
+
+
+/**
+ * \brief  Get Meta Data Encoder delay.
+ *
+ * \param hMetadataEnc          Meta Data Encoder handle.
+ *
+ * \return  Delay caused by Meta Data module.
+ */
+INT FDK_MetadataEnc_GetDelay(
+        HANDLE_FDK_METADATA_ENCODER      hMetadataEnc
+        );
+
+
+#endif /* _METADATA_MAIN_H */
+