Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 161 insertions, 0 deletions

diff --git a/libAACenc/src/metadata_main.h b/libAACenc/src/metadata_main.h
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+/**********************  Fraunhofer IIS FDK AAC Encoder lib  ******************
+
+                        (C) Copyright Fraunhofer IIS (2011)
+                               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): V. Bacigalupo
+   Description: Metadata Encoder library interface functions
+
+   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 _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 */
+