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/************************* Fast MPEG AAC Audio Encoder **********************
(C) Copyright Fraunhofer IIS (1999)
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.
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.
$Id$
Initial author: M. Schug / A. Groeschel
contents/description: fast aac coder interface library functions
******************************************************************************/
#ifndef _aacenc_h_
#define _aacenc_h_
#include "common_fix.h"
#include "FDK_audio.h"
#include "tpenc_lib.h"
#include "sbr_encoder.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* AAC-LC error codes.
*/
typedef enum {
AAC_ENC_OK = 0x0000, /*!< All fine. */
AAC_ENC_UNKNOWN = 0x0002, /*!< Error condition is of unknown reason, or from another module. */
/* initialization errors */
aac_enc_init_error_start = 0x2000,
AAC_ENC_INVALID_HANDLE = 0x2020, /*!< The handle passed to the function call was invalid (probably NULL). */
AAC_ENC_INVALID_FRAME_LENGTH = 0x2080, /*!< Invalid frame length (must be 1024 or 960). */
AAC_ENC_INVALID_N_CHANNELS = 0x20e0, /*!< Invalid amount of audio input channels. */
AAC_ENC_INVALID_SFB_TABLE = 0x2140, /*!< Internal encoder error. */
AAC_ENC_UNSUPPORTED_AOT = 0x3000, /*!< The Audio Object Type (AOT) is not supported. */
AAC_ENC_UNSUPPORTED_BITRATE = 0x3020, /*!< The chosen bitrate is not supported. */
AAC_ENC_UNSUPPORTED_BITRATE_MODE = 0x3028, /*!< Unsupported bit rate mode (CBR or VBR). */
AAC_ENC_UNSUPPORTED_ANC_BITRATE = 0x3040, /*!< Unsupported ancillay bitrate. */
AAC_ENC_UNSUPPORTED_ANC_MODE = 0x3060,
AAC_ENC_UNSUPPORTED_TRANSPORT_TYPE = 0x3080, /*!< The bitstream format is not supported. */
AAC_ENC_UNSUPPORTED_ER_FORMAT = 0x30a0, /*!< The error resilience tool format is not supported. */
AAC_ENC_UNSUPPORTED_EPCONFIG = 0x30c0, /*!< The error protection format is not supported. */
AAC_ENC_UNSUPPORTED_CHANNELCONFIG = 0x30e0, /*!< The channel configuration (either number or arrangement) is not supported. */
AAC_ENC_UNSUPPORTED_SAMPLINGRATE = 0x3100, /*!< Sample rate of audio input is not supported. */
AAC_ENC_NO_MEMORY = 0x3120, /*!< Could not allocate memory. */
AAC_ENC_PE_INIT_TABLE_NOT_FOUND = 0x3140, /*!< Internal encoder error. */
aac_enc_init_error_end,
/* encode errors */
aac_enc_error_start = 0x4000,
AAC_ENC_QUANT_ERROR = 0x4020, /*!< Too many bits used in quantization. */
AAC_ENC_WRITTEN_BITS_ERROR = 0x4040, /*!< Unexpected number of written bits, differs to
calculated number of bits. */
AAC_ENC_PNS_TABLE_ERROR = 0x4060, /*!< PNS level out of range. */
AAC_ENC_GLOBAL_GAIN_TOO_HIGH = 0x4080, /*!< Internal quantizer error. */
AAC_ENC_BITRES_TOO_LOW = 0x40a0, /*!< Too few bits in bit reservoir. */
AAC_ENC_BITRES_TOO_HIGH = 0x40a1, /*!< Too many bits in bit reservoir. */
AAC_ENC_INVALID_CHANNEL_BITRATE = 0x4100,
AAC_ENC_INVALID_ELEMENTINFO_TYPE = 0x4120, /*!< Internal encoder error. */
AAC_ENC_WRITE_SCAL_ERROR = 0x41e0, /*!< Error writing scalefacData. */
AAC_ENC_WRITE_SEC_ERROR = 0x4200, /*!< Error writing sectionData. */
AAC_ENC_WRITE_SPEC_ERROR = 0x4220, /*!< Error writing spectralData. */
aac_enc_error_end
} AAC_ENCODER_ERROR;
/*-------------------------- defines --------------------------------------*/
#define ANC_DATA_BUFFERSIZE 1024 /* ancBuffer size */
#define DEFAULT_FRAMELENGTH 1024 /* size of AAC core frame in (new) PCM samples */
#define MAX_TOTAL_EXT_PAYLOADS (((6) * (1)) + (2+2))
typedef enum {
AACENC_BR_MODE_INVALID = -1, /*!< Invalid bitrate mode. */
AACENC_BR_MODE_CBR = 0, /*!< Constant bitrate mode. */
AACENC_BR_MODE_VBR_1 = 1, /*!< Variable bitrate mode, about 32 kbps/channel. */
AACENC_BR_MODE_VBR_2 = 2, /*!< Variable bitrate mode, about 40 kbps/channel. */
AACENC_BR_MODE_VBR_3 = 3, /*!< Variable bitrate mode, about 48-56 kbps/channel. */
AACENC_BR_MODE_VBR_4 = 4, /*!< Variable bitrate mode, about 64 kbps/channel. */
AACENC_BR_MODE_VBR_5 = 5, /*!< Variable bitrate mode, about 80-96 kbps/channel. */
AACENC_BR_MODE_FF = 6, /*!< Fixed frame mode. */
AACENC_BR_MODE_SFR = 7 /*!< Superframe mode. */
} AACENC_BITRATE_MODE;
typedef enum {
CH_ORDER_MPEG = 0, /*!< MPEG channel ordering (e. g. 5.1: C, L, R, SL, SR, LFE) */
CH_ORDER_WAV /*!< WAV fileformat channel ordering (e. g. 5.1: L, R, C, LFE, SL, SR) */
} CHANNEL_ORDER;
/*-------------------- structure definitions ------------------------------*/
struct AACENC_CONFIG {
INT sampleRate; /* encoder sample rate */
INT bitRate; /* encoder bit rate in bits/sec */
INT ancDataBitRate; /* additional bits consumed by anc data or sbr have to be consiedered while configuration */
INT nSubFrames; /* number of frames in super frame (not ADTS/LATM subframes !) */
AUDIO_OBJECT_TYPE audioObjectType; /* Audio Object Type */
INT averageBits; /* encoder bit rate in bits/superframe */
INT bitrateMode; /* encoder bitrate mode (CBR/VBR) */
INT nChannels; /* number of channels to process */
CHANNEL_ORDER channelOrder; /* Input Channel ordering scheme. */
INT bandWidth; /* targeted audio bandwidth in Hz */
CHANNEL_MODE channelMode; /* encoder channel mode configuration */
INT framelength; /* used frame size */
UINT syntaxFlags; /* bitstreams syntax configuration */
SCHAR epConfig; /* error protection configuration */
INT anc_Rate; /* ancillary rate, 0 (disabled), -1 (default) else desired rate */
UINT maxAncBytesPerAU;
INT minBitsPerFrame; /* minimum number of bits in AU */
INT maxBitsPerFrame; /* maximum number of bits in AU */
INT bitreservoir; /* size of bitreservoir */
UCHAR useTns; /* flag: use temporal noise shaping */
UCHAR usePns; /* flag: use perceptual noise substitution */
UCHAR useIS; /* flag: use intensity coding */
UCHAR useRequant; /* flag: use afterburner */
};
typedef struct {
UCHAR *pData; /* pointer to extension payload data */
UINT dataSize; /* extension payload data size in bits */
EXT_PAYLOAD_TYPE dataType; /* extension payload data type */
INT associatedChElement; /* number of the channel element the data is assigned to */
} AACENC_EXT_PAYLOAD;
typedef struct AAC_ENC *HANDLE_AAC_ENC;
/**
* \brief Limit given bit rate to a valid value
* \param hTpEnc transport encoder handle
* \param coreSamplingRate the sample rate to be used for the AAC encoder
* \param frameLength the frameLength to be used for the AAC encoder
* \param nChannels number of total channels
* \param nChannelsEff number of effective channels
* \param bitRate the initial bit rate value for which the closest valid bit rate value is searched for
* \param averageBits average bits per frame for fixed framing. Set to -1 if not available.
* \param optional pointer where the current bits per frame are stored into.
* \param bitrateMode the current bit rate mode
* \param nSubFrames number of sub frames for super framing (not transport frames).
* \return a valid bit rate value as close as possible or identical to bitRate
*/
INT FDKaacEnc_LimitBitrate(
HANDLE_TRANSPORTENC hTpEnc,
INT coreSamplingRate,
INT frameLength,
INT nChannels,
INT nChannelsEff,
INT bitRate,
INT averageBits,
INT *pAverageBitsPerFrame,
INT bitrateMode,
INT nSubFrames
);
/*-----------------------------------------------------------------------------
functionname: FDKaacEnc_GetVBRBitrate
description: Get VBR bitrate from vbr quality
input params: int vbrQuality (VBR0, VBR1, VBR2)
channelMode
returns: vbr bitrate
------------------------------------------------------------------------------*/
INT FDKaacEnc_GetVBRBitrate(INT bitrateMode, CHANNEL_MODE channelMode);
/*-----------------------------------------------------------------------------
functionname: FDKaacEnc_AacInitDefaultConfig
description: gives reasonable default configuration
returns: ---
------------------------------------------------------------------------------*/
void FDKaacEnc_AacInitDefaultConfig(AACENC_CONFIG *config);
/*---------------------------------------------------------------------------
functionname:FDKaacEnc_Open
description: allocate and initialize a new encoder instance
returns: 0 if success
---------------------------------------------------------------------------*/
AAC_ENCODER_ERROR FDKaacEnc_Open(HANDLE_AAC_ENC *phAacEnc, /* pointer to an encoder handle, initialized on return */
const INT nElements, /* number of maximal elements in instance to support */
const INT nChannels, /* number of maximal channels in instance to support */
const INT nSubFrames); /* support superframing in instance */
AAC_ENCODER_ERROR FDKaacEnc_Initialize(HANDLE_AAC_ENC hAacEncoder, /* pointer to an encoder handle, initialized on return */
AACENC_CONFIG *config, /* pre-initialized config struct */
HANDLE_TRANSPORTENC hTpEnc,
ULONG initFlags);
/*---------------------------------------------------------------------------
functionname: FDKaacEnc_EncodeFrame
description: encode one frame
returns: 0 if success
---------------------------------------------------------------------------*/
AAC_ENCODER_ERROR FDKaacEnc_EncodeFrame( HANDLE_AAC_ENC hAacEnc, /* encoder handle */
HANDLE_TRANSPORTENC hTpEnc,
INT_PCM* inputBuffer,
INT* numOutBytes,
AACENC_EXT_PAYLOAD extPayload[MAX_TOTAL_EXT_PAYLOADS]
);
/*---------------------------------------------------------------------------
functionname:FDKaacEnc_Close
description: delete encoder instance
returns:
---------------------------------------------------------------------------*/
void FDKaacEnc_Close( HANDLE_AAC_ENC* phAacEnc); /* encoder handle */
#ifdef __cplusplus
}
#endif
#endif /* _aacenc_h_ */
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