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The Android Open Source Project
282
libPCMutils/include/pcmutils_lib.h
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282
libPCMutils/include/pcmutils_lib.h
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/* -----------------------------------------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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<EFBFBD> Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur F<>rderung der angewandten Forschung e.V.
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All rights reserved.
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1. INTRODUCTION
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The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
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the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
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This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
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AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
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audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
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independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
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of the MPEG specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
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may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
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individually for the purpose of encoding or decoding bit streams in products that are compliant with
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the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
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these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
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software may already be covered under those patent licenses when it is used for those licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
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are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
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applications information and documentation.
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2. COPYRIGHT LICENSE
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Redistribution and use in source and binary forms, with or without modification, are permitted without
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payment of copyright license fees provided that you satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
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your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation and/or other materials
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provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
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You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
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modifications thereto to recipients of copies in binary form.
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The name of Fraunhofer may not be used to endorse or promote products derived from this library without
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prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
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software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
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and the date of any change. For modified versions of the FDK AAC Codec, the term
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"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
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"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
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3. NO PATENT LICENSE
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NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
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ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
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respect to this software.
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You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
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by appropriate patent licenses.
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4. DISCLAIMER
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
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"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
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of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
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including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
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or business interruption, however caused and on any theory of liability, whether in contract, strict
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liability, or tort (including negligence), arising in any way out of the use of this software, even if
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advised of the possibility of such damage.
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5. CONTACT INFORMATION
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Fraunhofer Institute for Integrated Circuits IIS
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Attention: Audio and Multimedia Departments - FDK AAC LL
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Am Wolfsmantel 33
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91058 Erlangen, Germany
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www.iis.fraunhofer.de/amm
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amm-info@iis.fraunhofer.de
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----------------------------------------------------------------------------------------------------------- */
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/************************ FDK PCM up/downmixing module *********************
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Author(s): Christian Griebel
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Description: Declares functions to interface with the PCM downmix processing
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module.
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*******************************************************************************/
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#ifndef _PCMUTILS_LIB_H_
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#define _PCMUTILS_LIB_H_
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#include "machine_type.h"
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#include "common_fix.h"
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#include "FDK_audio.h"
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/* ------------------------ *
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* MODULE SETTINGS: *
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* ------------------------ */
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/* #define PCM_UPMIX_ENABLE */ /*!< Generally enable up mixing. */
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#define PCM_DOWNMIX_ENABLE /*!< Generally enable down mixing. */
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#define DVB_MIXDOWN_ENABLE /*!< Enable this to support DVB ancillary data for encoder
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assisted downmixing of MPEG-4 AAC and
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MPEG-1/2 layer 2 streams. PCM_DOWNMIX_ENABLE has to
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be enabled, too! */
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#define MPEG_PCE_MIXDOWN_ENABLE /*!< Enable this to support MPEG matrix mixdown with a
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coefficient carried in the PCE. PCM_DOWNMIX_ENABLE
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has to be enabled, too! */
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/* #define ARIB_MIXDOWN_ENABLE */ /*!< Enable modifications to the MPEG PCE mixdown method
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to fulfill ARIB standard. MPEG_PCE_MIXDOWN_ENABLE has
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to be set. */
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/* ------------------------ *
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* ERROR CODES: *
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* ------------------------ */
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typedef enum
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{
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PCMDMX_OK = 0x0, /*!< No error happened. */
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PCMDMX_OUT_OF_MEMORY = 0x2, /*!< Not enough memory to set up an instance of the module. */
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PCMDMX_UNKNOWN = 0x5, /*!< Error condition is of unknown reason, or from a third
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party module. */
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PCMDMX_INVALID_HANDLE, /*!< The given instance handle is not valid. */
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PCMDMX_INVALID_ARGUMENT, /*!< One of the parameters handed over is invalid. */
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PCMDMX_INVALID_CH_CONFIG, /*!< The given channel configuration is not supported and
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thus no processing was performed. */
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PCMDMX_INVALID_MODE, /*!< The set configuration/mode is not applicable. */
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PCMDMX_UNKNOWN_PARAM, /*!< The handed parameter is not known/supported. */
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PCMDMX_UNABLE_TO_SET_PARAM, /*!< Unable to set the specific parameter. Most probably
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the value ist out of range. */
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PCMDMX_CORRUPT_ANC_DATA /*!< The read ancillary data was corrupt. */
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} PCMDMX_ERROR;
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/* ------------------------ *
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* RUNTIME PARAMS: *
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* ------------------------ */
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typedef enum
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{
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DMX_BS_DATA_EXPIRY_FRAME, /*!< The number of frames without new metadata that have to
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go by before the bitstream data expires. The value 0
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disables expiry. */
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DMX_BS_DATA_DELAY, /*!< The number of delay frames of the output samples
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compared to the bitstream data. */
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NUMBER_OF_OUTPUT_CHANNELS , /*!< The number of output channels (equals the number of
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channels processed by the audio output setup). */
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DUAL_CHANNEL_DOWNMIX_MODE /*!< Downmix mode for two channel audio data. */
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} PCMDMX_PARAM;
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typedef enum
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{
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STEREO_MODE = 0x0, /*!< Leave stereo signals as they are. */
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CH1_MODE = 0x1, /*!< Create a dual mono output signal from channel 1. */
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CH2_MODE = 0x2, /*!< Create a dual mono output signal from channel 2. */
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MIXED_MODE = 0x3 /*!< Create a dual mono output signal by mixing the two channels. */
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} DUAL_CHANNEL_MODE;
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/* ------------------------ *
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* MODULES INTERFACE: *
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* ------------------------ */
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typedef struct PCM_DMX_INSTANCE *HANDLE_PCM_DOWNMIX;
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/* Modules reset flags */
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#define PCMDMX_RESET_PARAMS ( 1 )
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#define PCMDMX_RESET_BS_DATA ( 2 )
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#define PCMDMX_RESET_FULL ( PCMDMX_RESET_PARAMS | PCMDMX_RESET_BS_DATA )
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/** Open and initialize an instance of the PCM downmix module
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* @param [out] Pointer to a buffer receiving the handle of the new instance.
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* @returns Returns an error code.
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**/
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PCMDMX_ERROR pcmDmx_Open (
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HANDLE_PCM_DOWNMIX *pSelf
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);
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/** Set one parameter for one instance of the PCM downmix module.
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* @param [in] Handle of PCM downmix instance.
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* @param [in] Parameter to be set.
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* @param [in] Parameter value.
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* @returns Returns an error code.
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**/
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PCMDMX_ERROR pcmDmx_SetParam (
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HANDLE_PCM_DOWNMIX self,
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PCMDMX_PARAM param,
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UINT value
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);
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/** Read the ancillary data transported in DSEs of DVB streams with MPEG-4 content
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* @param [in] Handle of PCM downmix instance.
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* @param [in] Pointer to ancillary data buffer.
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* @param [in] Size of ancillary data.
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* @param [in] Flag indicating wheter the ancillary data is from a MPEG-1/2 or an MPEG-4 stream.
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* @returns Returns an error code.
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**/
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PCMDMX_ERROR pcmDmx_ReadDvbAncData (
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HANDLE_PCM_DOWNMIX self,
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UCHAR *pAncDataBuf,
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UINT ancDataBytes,
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int isMpeg2
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);
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/** Set the matrix mixdown information extracted from the PCE of an AAC bitstream.
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* Note: Call only if matrix_mixdown_idx_present is true.
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* @param [in] Handle of PCM downmix instance.
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* @param [in] Matrix mixdown index present flag extracted from PCE.
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* @param [in] The 2 bit matrix mixdown index extracted from PCE.
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* @param [in] The pseudo surround enable flag extracted from PCE.
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* @returns Returns an error code.
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**/
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PCMDMX_ERROR pcmDmx_SetMatrixMixdownFromPce (
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HANDLE_PCM_DOWNMIX self,
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int matrixMixdownPresent,
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int matrixMixdownIdx,
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int pseudoSurroundEnable
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);
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/** Reset the module.
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* @param [in] Handle of PCM downmix instance.
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* @param [in] Flags telling which parts of the module shall be reset.
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* @returns Returns an error code.
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**/
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PCMDMX_ERROR pcmDmx_Reset (
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HANDLE_PCM_DOWNMIX self,
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UINT flags
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);
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/** Apply down or up mixing.
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*
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* \param [in] Handle of PCM downmix module instance.
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* \param [inout] Pointer to time buffer with decoded PCM samples.
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* \param [in] Pointer where the amount of output samples is returned into.
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* \param [inout] Pointer where the amount of output channels is returned into.
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* \param [in] Flag which indicates if output time data are writtern interleaved or as subsequent blocks.
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* \param [inout] Array were the corresponding channel type for each output audio channel is stored into.
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* \param [inout] Array were the corresponding channel type index for each output audio channel is stored into.
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* \param [in] Array containing the output channel mapping to be used (From MPEG PCE ordering to whatever is required).
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*
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* @returns Returns an error code.
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**/
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PCMDMX_ERROR pcmDmx_ApplyFrame (
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HANDLE_PCM_DOWNMIX self,
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INT_PCM *pPcmBuf,
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UINT frameSize,
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INT *nChannels,
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int fInterleaved,
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AUDIO_CHANNEL_TYPE channelType[],
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UCHAR channelIndices[],
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const UCHAR channelMapping[][8]
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);
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/** Close an instance of the PCM downmix module.
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* @param [inout] Pointer to a buffer containing the handle of the instance.
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* @returns Returns an error code.
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**/
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PCMDMX_ERROR pcmDmx_Close (
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HANDLE_PCM_DOWNMIX *pSelf
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);
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/** Get library info for this module.
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* @param [out] Pointer to an allocated LIB_INFO structure.
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* @returns Returns an error code.
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*/
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PCMDMX_ERROR pcmDmx_GetLibInfo( LIB_INFO *info );
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#ifdef __cplusplus
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}
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#endif
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#endif /* _PCMUTILS_LIB_H_ */
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1281
libPCMutils/src/pcmutils_lib.cpp
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1281
libPCMutils/src/pcmutils_lib.cpp
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