xref: /aosp_15_r20/external/aac/libDRCdec/include/FDK_drcDecLib.h (revision e54365361535b070c2db7374cec45c159c7d0e7a)

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

© Copyright  1995 - 2019 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
[email protected]
----------------------------------------------------------------------------- */

/************************* MPEG-D DRC decoder library **************************

   Author(s):   Bernhard Neugebauer

   Description: MPEG-D DRC Decoder

*******************************************************************************/

#ifndef FDK_DRCDECLIB_H
#define FDK_DRCDECLIB_H

#include "FDK_bitstream.h"
#include "FDK_audio.h"
#include "common_fix.h"

/* DRC decoder according to ISO/IEC 23003-4 (MPEG-D DRC) */
/* including ISO/IEC 23003-4/AMD1 (Amendment 1) */

#ifdef __cplusplus
extern "C" {
#endif

#define DRC_DEC_LOUDNESS_NOT_PRESENT (LONG)0x7FFFFFFE

typedef struct s_drc_decoder* HANDLE_DRC_DECODER;
typedef struct s_uni_drc_interface* HANDLE_UNI_DRC_INTERFACE;
typedef struct s_selection_process_output* HANDLE_SEL_PROC_OUTPUT;

typedef enum {
  DRC_DEC_SELECTION = 0x1, /* DRC decoder instance for DRC set selection only */
  DRC_DEC_GAIN = 0x2,      /* DRC decoder instance for applying DRC only */
  DRC_DEC_ALL = 0x3        /* DRC decoder with full functionality */
} DRC_DEC_FUNCTIONAL_RANGE;

typedef enum {
  /* get and set userparams */
  DRC_DEC_BOOST,
  DRC_DEC_COMPRESS,
  /* set only userparams */
  DRC_DEC_LOUDNESS_NORMALIZATION_ON,
  DRC_DEC_TARGET_LOUDNESS, /**< target loudness in dB, with exponent e = 7 */
  DRC_DEC_EFFECT_TYPE,
  DRC_DEC_EFFECT_TYPE_FALLBACK_CODE,
  DRC_DEC_LOUDNESS_MEASUREMENT_METHOD,
  DRC_DEC_ALBUM_MODE,
  /* set only system (not user) parameters */
  DRC_DEC_DOWNMIX_ID,
  DRC_DEC_TARGET_CHANNEL_COUNT_REQUESTED, /**< number of output channels
                                             notified to FDK_drcDecLib for
                                             choosing an appropriate
                                             downmixInstruction */
  DRC_DEC_BASE_CHANNEL_COUNT,
  DRC_DEC_FRAME_SIZE,
  DRC_DEC_SAMPLE_RATE,
  /* get only system parameters */
  DRC_DEC_IS_MULTIBAND_DRC_1,
  DRC_DEC_IS_MULTIBAND_DRC_2,
  DRC_DEC_IS_ACTIVE, /**< MPEG-D DRC payload is present and at least one of
                        Dynamic Range Control (DRC) or Loudness Normalization
                        (LN) is activated */
  DRC_DEC_TARGET_CHANNEL_COUNT_SELECTED, /**< number of output channels if
                                            appropriate downmixInstruction
                                            exists */
  DRC_DEC_OUTPUT_LOUDNESS /**< output loudness in dB, with exponent e = 7, or
                             DRC_DEC_LOUDNESS_NOT_PRESENT if no loudness is
                             contained in the bitstream */
} DRC_DEC_USERPARAM;

typedef enum {
  DRC_DEC_OK = 0,

  DRC_DEC_NOT_OK = -10000,
  DRC_DEC_OUT_OF_MEMORY,
  DRC_DEC_NOT_OPENED,
  DRC_DEC_NOT_READY,
  DRC_DEC_PARAM_OUT_OF_RANGE,
  DRC_DEC_INVALID_PARAM,
  DRC_DEC_UNSUPPORTED_FUNCTION
} DRC_DEC_ERROR;

typedef enum {
  DRC_DEC_TEST_TIME_DOMAIN = -100,
  DRC_DEC_TEST_QMF_DOMAIN,
  DRC_DEC_TEST_STFT_DOMAIN,
  DRC_DEC_CODEC_MODE_UNDEFINED = -1,
  DRC_DEC_MPEG_4_AAC,
  DRC_DEC_MPEG_D_USAC,
  DRC_DEC_MPEG_H_3DA
} DRC_DEC_CODEC_MODE;

/* Apply only DRC sets dedicated to processing location.
   DRC1: before downmix
   DRC2: before or after downmix (AMD1: only after downmix)
   DRC3: after downmix */
typedef enum {
  DRC_DEC_DRC1,
  DRC_DEC_DRC1_DRC2,
  DRC_DEC_DRC2,
  DRC_DEC_DRC3,
  DRC_DEC_DRC2_DRC3
} DRC_DEC_LOCATION;

DRC_DEC_ERROR
FDK_drcDec_Open(HANDLE_DRC_DECODER* phDrcDec,
                const DRC_DEC_FUNCTIONAL_RANGE functionalRange);

DRC_DEC_ERROR
FDK_drcDec_SetCodecMode(HANDLE_DRC_DECODER hDrcDec,
                        const DRC_DEC_CODEC_MODE codecMode);

DRC_DEC_ERROR
FDK_drcDec_Init(HANDLE_DRC_DECODER hDrcDec, const int frameSize,
                const int sampleRate, const int baseChannelCount);

DRC_DEC_ERROR
FDK_drcDec_Close(HANDLE_DRC_DECODER* phDrcDec);

/* set single user request */
DRC_DEC_ERROR
FDK_drcDec_SetParam(HANDLE_DRC_DECODER hDrcDec,
                    const DRC_DEC_USERPARAM requestType,
                    const FIXP_DBL requestValue);

LONG FDK_drcDec_GetParam(HANDLE_DRC_DECODER hDrcDec,
                         const DRC_DEC_USERPARAM requestType);

DRC_DEC_ERROR
FDK_drcDec_SetInterfaceParameters(HANDLE_DRC_DECODER hDrcDec,
                                  HANDLE_UNI_DRC_INTERFACE uniDrcInterface);

DRC_DEC_ERROR
FDK_drcDec_SetSelectionProcessMpeghParameters_simple(
    HANDLE_DRC_DECODER hDrcDec, const int groupPresetIdRequested,
    const int numGroupIdsRequested, const int* groupIdsRequested);

DRC_DEC_ERROR
FDK_drcDec_SetDownmixInstructions(HANDLE_DRC_DECODER hDrcDec,
                                  const int numDowmixId, const int* downmixId,
                                  const int* targetLayout,
                                  const int* targetChannelCount);

void FDK_drcDec_SetSelectionProcessOutput(
    HANDLE_DRC_DECODER hDrcDec, HANDLE_SEL_PROC_OUTPUT hSelProcOutput);

HANDLE_SEL_PROC_OUTPUT
FDK_drcDec_GetSelectionProcessOutput(HANDLE_DRC_DECODER hDrcDec);

LONG /* FIXP_DBL, e = 7 */
FDK_drcDec_GetGroupLoudness(HANDLE_SEL_PROC_OUTPUT hSelProcOutput,
                            const int groupID, int* groupLoudnessAvailable);

void FDK_drcDec_SetChannelGains(HANDLE_DRC_DECODER hDrcDec,
                                const int numChannels, const int frameSize,
                                FIXP_DBL* channelGainDb, FIXP_DBL* audioBuffer,
                                const int audioBufferChannelOffset);

DRC_DEC_ERROR
FDK_drcDec_ReadUniDrcConfig(HANDLE_DRC_DECODER hDrcDec,
                            HANDLE_FDK_BITSTREAM hBitstream);

DRC_DEC_ERROR
FDK_drcDec_ReadLoudnessInfoSet(HANDLE_DRC_DECODER hDrcDec,
                               HANDLE_FDK_BITSTREAM hBitstream);

DRC_DEC_ERROR
FDK_drcDec_ReadLoudnessBox(HANDLE_DRC_DECODER hDrcDec,
                           HANDLE_FDK_BITSTREAM hBitstream);

DRC_DEC_ERROR
FDK_drcDec_ReadDownmixInstructions_Box(HANDLE_DRC_DECODER hDrcDec,
                                       HANDLE_FDK_BITSTREAM hBitstream);

DRC_DEC_ERROR
FDK_drcDec_ReadUniDrcInstructions_Box(HANDLE_DRC_DECODER hDrcDec,
                                      HANDLE_FDK_BITSTREAM hBitstream);

DRC_DEC_ERROR
FDK_drcDec_ReadUniDrcCoefficients_Box(HANDLE_DRC_DECODER hDrcDec,
                                      HANDLE_FDK_BITSTREAM hBitstream);

DRC_DEC_ERROR
FDK_drcDec_ReadUniDrcGain(HANDLE_DRC_DECODER hDrcDec,
                          HANDLE_FDK_BITSTREAM hBitstream);

/* either call FDK_drcDec_ReadUniDrcConfig, FDK_drcDec_ReadLoudnessInfoSet and
   FDK_drcDec_ReadUniDrcGain separately, or call FDK_drcDec_ReadUniDrc */
DRC_DEC_ERROR
FDK_drcDec_ReadUniDrc(HANDLE_DRC_DECODER hDrcDec,
                      HANDLE_FDK_BITSTREAM hBitstream);

/* calling sequence:
   FDK_drcDec_Read...()
   FDK_drcDec_SetChannelGains()
   FDK_drcDec_Preprocess()
   FDK_drcDec_Process...() */

DRC_DEC_ERROR
FDK_drcDec_Preprocess(HANDLE_DRC_DECODER hDrcDec);

DRC_DEC_ERROR
FDK_drcDec_ProcessTime(HANDLE_DRC_DECODER hDrcDec, const int delaySamples,
                       const DRC_DEC_LOCATION drcLocation,
                       const int channelOffset, const int drcChannelOffset,
                       const int numChannelsProcessed, FIXP_DBL* realBuffer,
                       const int timeDataChannelOffset);

DRC_DEC_ERROR
FDK_drcDec_ProcessFreq(HANDLE_DRC_DECODER hDrcDec, const int delaySamples,
                       const DRC_DEC_LOCATION drcLocation,
                       const int channelOffset, const int drcChannelOffset,
                       const int numChannelsProcessed,
                       const int processSingleTimeslot, FIXP_DBL** realBuffer,
                       FIXP_DBL** imagBuffer);

DRC_DEC_ERROR
FDK_drcDec_ApplyDownmix(HANDLE_DRC_DECODER hDrcDec, int* reverseInChannelMap,
                        int* reverseOutChannelMap, FIXP_DBL* realBuffer,
                        int* pNChannels);

/* Get library info for this module. */
DRC_DEC_ERROR
FDK_drcDec_GetLibInfo(LIB_INFO* info);

#ifdef __cplusplus
}
#endif
#endif