
/* -----------------------------------------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android

© Copyright  1995 - 2013 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 */

