diff options
Diffstat (limited to 'libAACenc/src/aacenc_lib.cpp')
| -rw-r--r-- | libAACenc/src/aacenc_lib.cpp | 524 |
1 files changed, 378 insertions, 146 deletions
diff --git a/libAACenc/src/aacenc_lib.cpp b/libAACenc/src/aacenc_lib.cpp index a4291d5..95c08b3 100644 --- a/libAACenc/src/aacenc_lib.cpp +++ b/libAACenc/src/aacenc_lib.cpp @@ -2,7 +2,7 @@ /* ----------------------------------------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. +© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. All rights reserved. 1. INTRODUCTION @@ -97,8 +97,8 @@ amm-info@iis.fraunhofer.de /* Encoder library info */ #define AACENCODER_LIB_VL0 3 -#define AACENCODER_LIB_VL1 3 -#define AACENCODER_LIB_VL2 3 +#define AACENCODER_LIB_VL1 4 +#define AACENCODER_LIB_VL2 12 #define AACENCODER_LIB_TITLE "AAC Encoder" #define AACENCODER_LIB_BUILD_DATE __DATE__ #define AACENCODER_LIB_BUILD_TIME __TIME__ @@ -118,10 +118,12 @@ amm-info@iis.fraunhofer.de #define SBL(fl) (fl/8) /*!< Short block length (hardcoded to 8 short blocks per long block) */ #define BSLA(fl) (4*SBL(fl)+SBL(fl)/2) /*!< AAC block switching look-ahead */ #define DELAY_AAC(fl) (fl+BSLA(fl)) /*!< MDCT + blockswitching */ -#define DELAY_AACELD(fl) ( (fl) + ((fl)/2) ) /*!< ELD FB delay */ +#define DELAY_AACELD(fl) ((fl)/2) /*!< ELD FB delay (no framing delay included) */ #define INPUTBUFFER_SIZE (1537+100+2048) +#define DEFAULT_HEADER_PERIOD_REPETITION_RATE 10 /*!< Default header repetition rate used in transport library and for SBR header. */ + //////////////////////////////////////////////////////////////////////////////////// /** * Flags to characterize encoder modules to be supported in present instance. @@ -164,7 +166,8 @@ typedef struct { UCHAR userMetaDataMode; /*!< Meta data library configuration. */ - UCHAR userSbrEnabled; + UCHAR userSbrEnabled; /*!< Enable SBR for ELD. */ + UINT userSbrRatio; /*!< SBR sampling rate ratio. Dual- or single-rate. */ } USER_PARAM; @@ -212,8 +215,8 @@ struct AACENCODER AACENC_EXT_PAYLOAD extPayload [MAX_TOTAL_EXT_PAYLOADS]; /* Extension payload */ - UCHAR extPayloadData [(1)][(6)][MAX_PAYLOAD_SIZE]; - UINT extPayloadSize [(1)][(6)]; /* payload sizes in bits */ + UCHAR extPayloadData [(1)][(8)][MAX_PAYLOAD_SIZE]; + UINT extPayloadSize [(1)][(8)]; /* payload sizes in bits */ ULONG InitFlags; /* internal status to treggier re-initialization */ @@ -227,12 +230,92 @@ struct AACENCODER UINT encoder_modis; - /* Capabity flags */ + /* Capability flags */ UINT CAPF_tpEnc; } ; -//////////////////////////////////////////////////////////////////////////////////// +typedef struct +{ + ULONG samplingRate; /*!< Encoder output sampling rate. */ + ULONG bitrateRange; /*!< Lower bitrate range for config entry. */ + + UCHAR lowDelaySbr; /*!< 0: ELD sbr off, + 1: ELD sbr on */ + + UCHAR downsampledSbr; /*!< 0: ELD with dualrate sbr, + 1: ELD with downsampled sbr */ + +} ELD_SBR_CONFIGURATOR; + +/** + * \brief This table defines ELD/SBR default configurations. + */ +static const ELD_SBR_CONFIGURATOR eldSbrAutoConfigTab[] = +{ + { 48000, 0, 1, 0 }, + { 48000, 64001, 0, 0 }, + + { 44100, 0, 1, 0 }, + { 44100, 64001, 0, 0 }, + + { 32000, 0, 1, 0 }, + { 32000, 28000, 1, 1 }, + { 32000, 56000, 0, 0 }, + + { 24000, 0, 1, 1 }, + { 24000, 40000, 0, 0 }, + + { 16000, 0, 1, 1 }, + { 16000, 28000, 0, 0 } + +}; + +/* + * \brief Configure SBR for ELD configuration. + * + * This function finds default SBR configuration for ELD based on sampling rate and channel bitrate. + * Outputparameters are SBR on/off, and SBR ratio. + * + * \param samplingRate Audio signal sampling rate. + * \param channelMode Channel configuration to be used. + * \param totalBitrate Overall bitrate. + * \param eldSbr Pointer to eldSbr parameter, filled on return. + * \param eldSbrRatio Pointer to eldSbrRatio parameter, filled on return. + * + * \return - AACENC_OK, all fine. + * - AACENC_INVALID_CONFIG, on failure. + */ +static AACENC_ERROR eldSbrConfigurator( + const ULONG samplingRate, + const CHANNEL_MODE channelMode, + const ULONG totalBitrate, + UINT * const eldSbr, + UINT * const eldSbrRatio + ) +{ + AACENC_ERROR err = AACENC_OK; + int i, cfgIdx = -1; + const ULONG channelBitrate = totalBitrate / FDKaacEnc_GetChannelModeConfiguration(channelMode)->nChannelsEff; + + for (i=0; i<(sizeof(eldSbrAutoConfigTab)/sizeof(ELD_SBR_CONFIGURATOR)); i++) { + if ( (samplingRate <= eldSbrAutoConfigTab[i].samplingRate) + && (channelBitrate >= eldSbrAutoConfigTab[i].bitrateRange) ) + { + cfgIdx = i; + } + } + + if (cfgIdx != -1) { + *eldSbr = (eldSbrAutoConfigTab[cfgIdx].lowDelaySbr==0) ? 0 : 1; + *eldSbrRatio = (eldSbrAutoConfigTab[cfgIdx].downsampledSbr==0) ? 2 : 1; + } + else { + err = AACENC_INVALID_CONFIG; /* no default configuration for eld-sbr available. */ + } + + return err; +} static inline INT isSbrActive(const HANDLE_AACENC_CONFIG hAacConfig) { @@ -253,6 +336,70 @@ static inline INT isSbrActive(const HANDLE_AACENC_CONFIG hAacConfig) return ( sbrUsed ); } +static inline INT isPsActive(const AUDIO_OBJECT_TYPE audioObjectType) +{ + INT psUsed = 0; + + if ( (audioObjectType==AOT_PS) + || (audioObjectType==AOT_MP2_PS) + || (audioObjectType==AOT_DABPLUS_PS) + || (audioObjectType==AOT_DRM_MPEG_PS) ) + { + psUsed = 1; + } + + return ( psUsed ); +} + +static SBR_PS_SIGNALING getSbrSignalingMode( + const AUDIO_OBJECT_TYPE audioObjectType, + const TRANSPORT_TYPE transportType, + const UCHAR transportSignaling, + const UINT sbrRatio + ) + +{ + SBR_PS_SIGNALING sbrSignaling; + + if (transportType==TT_UNKNOWN || sbrRatio==0) { + sbrSignaling = SIG_UNKNOWN; /* Needed parameters have not been set */ + return sbrSignaling; + } else { + sbrSignaling = SIG_IMPLICIT; /* default: implicit signaling */ + } + + if ((audioObjectType==AOT_AAC_LC) || (audioObjectType==AOT_SBR) || (audioObjectType==AOT_PS) || + (audioObjectType==AOT_MP2_AAC_LC) || (audioObjectType==AOT_MP2_SBR) || (audioObjectType==AOT_MP2_PS) ) { + switch (transportType) { + case TT_MP4_ADIF: + case TT_MP4_ADTS: + sbrSignaling = SIG_IMPLICIT; /* For MPEG-2 transport types, only implicit signaling is possible */ + break; + + case TT_MP4_RAW: + case TT_MP4_LATM_MCP1: + case TT_MP4_LATM_MCP0: + case TT_MP4_LOAS: + default: + if ( transportSignaling==0xFF ) { + /* Defaults */ + if ( sbrRatio==1 ) { + sbrSignaling = SIG_EXPLICIT_HIERARCHICAL; /* For downsampled SBR, explicit signaling is mandatory */ + } else { + sbrSignaling = SIG_IMPLICIT; /* For dual-rate SBR, implicit signaling is default */ + } + } else { + /* User set parameters */ + /* Attention: Backward compatible explicit signaling does only work with AMV1 for LATM/LOAS */ + sbrSignaling = (SBR_PS_SIGNALING)transportSignaling; + } + break; + } + } + + return sbrSignaling; +} + /**************************************************************************** Allocate Encoder ****************************************************************************/ @@ -266,8 +413,12 @@ C_ALLOC_MEM (_AacEncoder, AACENCODER, 1) /* * Map Encoder specific config structures to CODER_CONFIG. */ -static -void FDKaacEnc_MapConfig(CODER_CONFIG *cc, USER_PARAM *extCfg, HANDLE_AACENC_CONFIG hAacConfig) +static void FDKaacEnc_MapConfig( + CODER_CONFIG *const cc, + const USER_PARAM *const extCfg, + const SBR_PS_SIGNALING sbrSignaling, + const HANDLE_AACENC_CONFIG hAacConfig + ) { AUDIO_OBJECT_TYPE transport_AOT = AOT_NULL_OBJECT; FDKmemclear(cc, sizeof(CODER_CONFIG)); @@ -304,17 +455,26 @@ void FDKaacEnc_MapConfig(CODER_CONFIG *cc, USER_PARAM *extCfg, HANDLE_AACENC_CON } /* Configure extension aot. */ - if (extCfg->userTpSignaling==0) { + if (sbrSignaling==SIG_IMPLICIT) { cc->extAOT = AOT_NULL_OBJECT; /* implicit */ } else { - if ( (extCfg->userTpSignaling==1) && ( (transport_AOT==AOT_SBR) || (transport_AOT==AOT_PS) ) ) { + if ( (sbrSignaling==SIG_EXPLICIT_BW_COMPATIBLE) && ( (transport_AOT==AOT_SBR) || (transport_AOT==AOT_PS) ) ) { cc->extAOT = AOT_SBR; /* explicit backward compatible */ } else { cc->extAOT = transport_AOT; /* explicit hierarchical */ } } + + if ( (transport_AOT==AOT_SBR) || (transport_AOT==AOT_PS) ) { + cc->sbrPresent=1; + if (transport_AOT==AOT_PS) { + cc->psPresent=1; + } + } + cc->sbrSignaling = sbrSignaling; + cc->extSamplingRate = extCfg->userSamplerate; cc->bitRate = hAacConfig->bitRate; cc->noChannels = hAacConfig->nChannels; @@ -335,7 +495,7 @@ void FDKaacEnc_MapConfig(CODER_CONFIG *cc, USER_PARAM *extCfg, HANDLE_AACENC_CON case TT_MP4_ADTS: case TT_MP4_LOAS: case TT_MP4_LATM_MCP1: - cc->headerPeriod = 10; + cc->headerPeriod = DEFAULT_HEADER_PERIOD_REPETITION_RATE; break; default: cc->headerPeriod = 0; @@ -351,7 +511,6 @@ void FDKaacEnc_MapConfig(CODER_CONFIG *cc, USER_PARAM *extCfg, HANDLE_AACENC_CON case AOT_MP2_SBR: case AOT_MP2_PS: cc->flags &= ~CC_MPEG_ID; /* Required for ADTS. */ - //config->userTpSignaling=0; cc->extAOT = AOT_NULL_OBJECT; break; default: @@ -411,7 +570,7 @@ AAC_ENCODER_ERROR aacEncDefaultConfig(HANDLE_AACENC_CONFIG hAacConfig, /* make reasonable default settings */ FDKaacEnc_AacInitDefaultConfig (hAacConfig); - /* clear confure structure and copy default settings */ + /* clear configuration structure and copy default settings */ FDKmemclear(config, sizeof(USER_PARAM)); /* copy encoder configuration settings */ @@ -438,7 +597,7 @@ AAC_ENCODER_ERROR aacEncDefaultConfig(HANDLE_AACENC_CONFIG hAacConfig, /* initialize transport parameters */ config->userTpType = TT_UNKNOWN; config->userTpAmxv = 0; - config->userTpSignaling = 0; /* default, implicit signaling */ + config->userTpSignaling = 0xFF; /* choose signaling automatically */ config->userTpNsubFrames = 1; config->userTpProtection = 0; /* not crc protected*/ config->userTpHeaderPeriod = 0xFF; /* header period in auto mode */ @@ -447,6 +606,14 @@ AAC_ENCODER_ERROR aacEncDefaultConfig(HANDLE_AACENC_CONFIG hAacConfig, config->userAncDataRate = 0; + /* SBR rate is set to 0 here, which means it should be set automatically + in FDKaacEnc_AdjustEncSettings() if the user did not set a rate + expilicitely. */ + config->userSbrRatio = 0; + + /* SBR enable set to -1 means to inquire ELD audio configurator for reasonable configuration. */ + config->userSbrEnabled = -1; + return AAC_ENC_OK; } @@ -481,6 +648,7 @@ INT aacEncoder_LimitBitrate( INT bitRate, const INT nSubFrames, const INT sbrActive, + const INT sbrDownSampleRate, const AUDIO_OBJECT_TYPE aot ) { @@ -490,8 +658,7 @@ INT aacEncoder_LimitBitrate( FDKaacEnc_InitChannelMapping(channelMode, CH_ORDER_MPEG, &cm); if (sbrActive) { - /* Assume SBR rate ratio of 2:1 */ - coreSamplingRate = samplingRate / 2; + coreSamplingRate = samplingRate >> (sbrEncoder_IsSingleRatePossible(aot) ? (sbrDownSampleRate-1):1); } else { coreSamplingRate = samplingRate; } @@ -506,7 +673,7 @@ INT aacEncoder_LimitBitrate( bitRate = FDKmin(576000*nChannels, bitRate); /*bitRate = FDKmax(0*nChannels, bitRate);*/ } - + /* Limit bit rate in respect to the core coder */ bitRate = FDKaacEnc_LimitBitrate( @@ -525,56 +692,58 @@ INT aacEncoder_LimitBitrate( /* Limit bit rate in respect to available SBR modes if active */ if (sbrActive) { - SBR_ELEMENT_INFO sbrElInfo[6]; - INT sbrBitRate = 0; - int e, tooBig=-1; + int numIterations = 0; + INT initialBitrate, adjustedBitrate; + initialBitrate = adjustedBitrate = bitRate; - FDK_ASSERT(cm.nElements <= (6)); + /* Find total bitrate which provides valid configuration for each SBR element. */ + do { + int e; + SBR_ELEMENT_INFO sbrElInfo[(8)]; + FDK_ASSERT(cm.nElements <= (8)); - /* Get bit rate for each SBR element */ - aacEncDistributeSbrBits(&cm, sbrElInfo, bitRate); + initialBitrate = adjustedBitrate; - for (e=0; e<cm.nElements; e++) - { - INT sbrElementBitRateIn, sbrBitRateOut; + /* Get bit rate for each SBR element */ + aacEncDistributeSbrBits(&cm, sbrElInfo, initialBitrate); - if (cm.elInfo[e].elType != ID_SCE && cm.elInfo[e].elType != ID_CPE) { - continue; - } - sbrElementBitRateIn = sbrElInfo[e].bitRate; - sbrBitRateOut = sbrEncoder_LimitBitRate(sbrElementBitRateIn , cm.elInfo[e].nChannelsInEl, coreSamplingRate, aot); - if (sbrBitRateOut == 0) { - return 0; - } - if (sbrElementBitRateIn < sbrBitRateOut) { - FDK_ASSERT(tooBig != 1); - tooBig = 0; - if (e == 0) { - sbrBitRate = 0; - } - } - if (sbrElementBitRateIn > sbrBitRateOut) { - FDK_ASSERT(tooBig != 0); - tooBig = 1; - if (e == 0) { - sbrBitRate = 5000000; - } - } - if (tooBig != -1) + for (e=0; e<cm.nElements; e++) { - INT sbrBitRateLimit = (INT)fDivNorm((FIXP_DBL)sbrBitRateOut, cm.elInfo[e].relativeBits); - if (tooBig) { - sbrBitRate = fMin(sbrBitRate, sbrBitRateLimit-16); - FDK_ASSERT( (INT)fMultNorm(cm.elInfo[e].relativeBits, (FIXP_DBL)sbrBitRate) < sbrBitRateOut); - } else { - sbrBitRate = fMax(sbrBitRate, sbrBitRateLimit+16); - FDK_ASSERT( (INT)fMultNorm(cm.elInfo[e].relativeBits, (FIXP_DBL)sbrBitRate) >= sbrBitRateOut); + INT sbrElementBitRateIn, sbrBitRateOut; + + if (cm.elInfo[e].elType != ID_SCE && cm.elInfo[e].elType != ID_CPE) { + continue; } - } - } - if (tooBig != -1) { - bitRate = sbrBitRate; - } + sbrElementBitRateIn = sbrElInfo[e].bitRate; + sbrBitRateOut = sbrEncoder_LimitBitRate(sbrElementBitRateIn , cm.elInfo[e].nChannelsInEl, coreSamplingRate, aot); + if (sbrBitRateOut == 0) { + return 0; + } + + /* If bitrates don't match, distribution and limiting needs to be determined again. + Abort element loop and restart with adapted bitrate. */ + if (sbrElementBitRateIn != sbrBitRateOut) { + + if (sbrElementBitRateIn < sbrBitRateOut) { + adjustedBitrate = fMax(initialBitrate, (INT)fDivNorm((FIXP_DBL)(sbrBitRateOut+8), cm.elInfo[e].relativeBits)); + break; + } + + if (sbrElementBitRateIn > sbrBitRateOut) { + adjustedBitrate = fMin(initialBitrate, (INT)fDivNorm((FIXP_DBL)(sbrBitRateOut-8), cm.elInfo[e].relativeBits)); + break; + } + + } /* sbrElementBitRateIn != sbrBitRateOut */ + + } /* elements */ + + numIterations++; /* restrict iteration to worst case of num elements */ + + } while ( (initialBitrate!=adjustedBitrate) && (numIterations<=cm.nElements) ); + + /* Unequal bitrates mean that no reasonable bitrate configuration found. */ + bitRate = (initialBitrate==adjustedBitrate) ? adjustedBitrate : 0; } FDK_ASSERT(bitRate > 0); @@ -624,26 +793,12 @@ AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder, case AOT_MP2_SBR: case AOT_MP2_PS: hAacConfig->usePns = 0; - if (config->userTpSignaling!=0) { - return AACENC_INVALID_CONFIG; /* only implicit signaling allowed */ - } case AOT_AAC_LC: case AOT_SBR: case AOT_PS: config->userTpType = (config->userTpType!=TT_UNKNOWN) ? config->userTpType : TT_MP4_ADTS; hAacConfig->framelength = (config->userFramelength!=(UINT)-1) ? config->userFramelength : 1024; - if (hAacConfig->framelength != 1024 && hAacConfig->framelength != 960) { - return AACENC_INVALID_CONFIG; - } - break; - case AOT_ER_AAC_LC: - hAacConfig->epConfig = 0; - hAacConfig->syntaxFlags |= AC_ER; - hAacConfig->syntaxFlags |= ((config->userErTools & 0x1) ? AC_ER_VCB11 : 0); - hAacConfig->syntaxFlags |= ((config->userErTools & 0x2) ? AC_ER_HCR : 0); - config->userTpType = (config->userTpType!=TT_UNKNOWN) ? config->userTpType : TT_MP4_LOAS; - hAacConfig->framelength = (config->userFramelength!=(UINT)-1) ? config->userFramelength : 1024; - if (hAacConfig->framelength != 1024 && hAacConfig->framelength != 960) { + if (hAacConfig->framelength != 1024) { return AACENC_INVALID_CONFIG; } break; @@ -665,7 +820,7 @@ AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder, hAacConfig->syntaxFlags |= ((config->userErTools & 0x1) ? AC_ER_VCB11 : 0); hAacConfig->syntaxFlags |= ((config->userErTools & 0x2) ? AC_ER_HCR : 0); hAacConfig->syntaxFlags |= ((config->userErTools & 0x4) ? AC_ER_RVLC : 0); - hAacConfig->syntaxFlags |= ((config->userSbrEnabled) ? AC_SBR_PRESENT : 0); + hAacConfig->syntaxFlags |= ((config->userSbrEnabled==1) ? AC_SBR_PRESENT : 0); config->userTpType = (config->userTpType!=TT_UNKNOWN) ? config->userTpType : TT_MP4_LOAS; hAacConfig->framelength = (config->userFramelength!=(UINT)-1) ? config->userFramelength : 512; if (hAacConfig->framelength != 512 && hAacConfig->framelength != 480) { @@ -676,19 +831,6 @@ AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder, break; } - /* We need the frame length to call aacEncoder_LimitBitrate() */ - hAacConfig->bitRate = aacEncoder_LimitBitrate( - NULL, - hAacConfig->sampleRate, - hAacConfig->framelength, - hAacConfig->nChannels, - hAacConfig->channelMode, - config->userBitrate, - hAacConfig->nSubFrames, - isSbrActive(hAacConfig), - hAacConfig->audioObjectType - ); - switch ( hAacConfig->audioObjectType ) { case AOT_ER_AAC_LD: case AOT_ER_AAC_ELD: @@ -696,7 +838,7 @@ AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder, hAacConfig->bitrateMode = 0; } if (config->userBitrateMode==0) { - hAacConfig->bitreservoir = 50*config->nChannels; /* default, reduced bitreservoir */ + hAacConfig->bitreservoir = 100*config->nChannels; /* default, reduced bitreservoir */ } if (hAacConfig->bitrateMode!=0) { return AACENC_INVALID_CONFIG; @@ -706,24 +848,7 @@ AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder, break; } - if (hAacConfig->epConfig >= 0) { - hAacConfig->syntaxFlags |= AC_ER; - if (((INT)hAacConfig->channelMode < 1) || ((INT)hAacConfig->channelMode > 7)) { - return AACENC_INVALID_CONFIG; /* Cannel config 0 not supported. */ - } - } - - if ( FDKaacEnc_DetermineEncoderMode(&hAacConfig->channelMode, hAacConfig->nChannels) != AAC_ENC_OK) { - return AACENC_INVALID_CONFIG; /* nChannels doesn't match chMode, this is just a check-up */ - } - - if ( (hAacConfig->nChannels > hAacEncoder->nMaxAacChannels) - || ( (FDKaacEnc_GetChannelModeConfiguration(hAacConfig->channelMode)->nChannelsEff > hAacEncoder->nMaxSbrChannels) && - isSbrActive(hAacConfig) ) - ) - { - return AACENC_INVALID_CONFIG; /* not enough channels allocated */ - } + hAacConfig->bitRate = config->userBitrate; /* get bitrate in VBR configuration */ if ( (hAacConfig->bitrateMode>=1) && (hAacConfig->bitrateMode<=5) ) { @@ -734,25 +859,92 @@ AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder, /* Set default bitrate if no external bitrate declared. */ - if (hAacConfig->bitRate==-1) { + if ( (hAacConfig->bitrateMode==0) && (config->userBitrate==(UINT)-1) ) { INT bitrate = FDKaacEnc_GetChannelModeConfiguration(hAacConfig->channelMode)->nChannelsEff * hAacConfig->sampleRate; - switch (hAacConfig->audioObjectType) + + if ( isPsActive(hAacConfig->audioObjectType) ) { + hAacConfig->bitRate = (bitrate>>1); /* 0.5 bit per sample */ + } + else if ( isSbrActive(hAacConfig) ) + { + if ( (config->userSbrRatio==2) || ((config->userSbrRatio==0)&&(hAacConfig->audioObjectType!=AOT_ER_AAC_ELD)) ) { + hAacConfig->bitRate = (bitrate + (bitrate>>2))>>1; /* 0.625 bits per sample */ + } + if ( (config->userSbrRatio==1) || ((config->userSbrRatio==0)&&(hAacConfig->audioObjectType==AOT_ER_AAC_ELD)) ) { + hAacConfig->bitRate = (bitrate + (bitrate>>3)); /* 1.125 bits per sample */ + } + } else { - case AOT_AAC_LC: hAacConfig->bitRate = bitrate + (bitrate>>1); /* 1.5 bits per sample */ - break; - case AOT_SBR: - hAacConfig->bitRate = (bitrate + (bitrate>>2))>>1; /* 0.625 bits per sample */ - break; - case AOT_PS: - hAacConfig->bitRate = (bitrate>>1); /* 0.5 bit per sample */ - break; - default: - hAacConfig->bitRate = bitrate; - break; } } + /* Initialize SBR parameters */ + if ( (hAacConfig->audioObjectType==AOT_ER_AAC_ELD) + && (config->userSbrEnabled == (UCHAR)-1) && (config->userSbrRatio==0) ) + { + UINT eldSbr = 0; + UINT eldSbrRatio = 0; + + if ( AACENC_OK!=(err=eldSbrConfigurator( + hAacConfig->sampleRate, + hAacConfig->channelMode, + hAacConfig->bitRate, + &eldSbr, + &eldSbrRatio)) ) + { + return err; + } + + hAacConfig->syntaxFlags |= ((eldSbr) ? AC_SBR_PRESENT : 0); + hAacConfig->sbrRatio = eldSbrRatio; + } + else + if ( (config->userSbrRatio==0) && (isSbrActive(hAacConfig)) ) { + /* Automatic SBR ratio configuration + * - downsampled SBR for ELD + * - otherwise always dualrate SBR + */ + hAacConfig->sbrRatio = (hAacConfig->audioObjectType==AOT_ER_AAC_ELD) ? 1 : 2; + } + else { + /* SBR ratio has been set by the user, so use it. */ + hAacConfig->sbrRatio = config->userSbrRatio; + } + + { + UCHAR tpSignaling=getSbrSignalingMode(hAacConfig->audioObjectType, config->userTpType, config->userTpSignaling, hAacConfig->sbrRatio); + + if ( (hAacConfig->audioObjectType==AOT_AAC_LC || hAacConfig->audioObjectType==AOT_SBR || hAacConfig->audioObjectType==AOT_PS) && + (config->userTpType==TT_MP4_LATM_MCP1 || config->userTpType==TT_MP4_LATM_MCP0 || config->userTpType==TT_MP4_LOAS) && + (tpSignaling==1) && (config->userTpAmxv==0) ) { + /* For backward compatible explicit signaling, AMV1 has to be active */ + return AACENC_INVALID_CONFIG; + } + + if ( (hAacConfig->audioObjectType==AOT_AAC_LC || hAacConfig->audioObjectType==AOT_SBR || hAacConfig->audioObjectType==AOT_PS) && + (tpSignaling==0) && (hAacConfig->sbrRatio==1)) { + /* Downsampled SBR has to be signaled explicitely (for transmission of SBR sampling fequency) */ + return AACENC_INVALID_CONFIG; + } + } + + + + /* We need the frame length to call aacEncoder_LimitBitrate() */ + hAacConfig->bitRate = aacEncoder_LimitBitrate( + NULL, + hAacConfig->sampleRate, + hAacConfig->framelength, + hAacConfig->nChannels, + hAacConfig->channelMode, + hAacConfig->bitRate, + hAacConfig->nSubFrames, + isSbrActive(hAacConfig), + hAacConfig->sbrRatio, + hAacConfig->audioObjectType + ); + /* Configure PNS */ if ( ((hAacConfig->bitrateMode>=1) && (hAacConfig->bitrateMode<=5)) /* VBR without PNS. */ || (hAacConfig->useTns == 0) ) /* TNS required. */ @@ -760,12 +952,32 @@ AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder, hAacConfig->usePns = 0; } + if (hAacConfig->epConfig >= 0) { + hAacConfig->syntaxFlags |= AC_ER; + if (((INT)hAacConfig->channelMode < 1) || ((INT)hAacConfig->channelMode > 7)) { + return AACENC_INVALID_CONFIG; /* Cannel config 0 not supported. */ + } + } + + if ( FDKaacEnc_DetermineEncoderMode(&hAacConfig->channelMode, hAacConfig->nChannels) != AAC_ENC_OK) { + return AACENC_INVALID_CONFIG; /* nChannels doesn't match chMode, this is just a check-up */ + } + + if ( (hAacConfig->nChannels > hAacEncoder->nMaxAacChannels) + || ( (FDKaacEnc_GetChannelModeConfiguration(hAacConfig->channelMode)->nChannelsEff > hAacEncoder->nMaxSbrChannels) && + isSbrActive(hAacConfig) ) + ) + { + return AACENC_INVALID_CONFIG; /* not enough channels allocated */ + } + /* Meta data restriction. */ switch (hAacConfig->audioObjectType) { /* Allow metadata support */ case AOT_AAC_LC: case AOT_SBR: + case AOT_PS: hAacEncoder->metaDataAllowed = 1; if (((INT)hAacConfig->channelMode < 1) || ((INT)hAacConfig->channelMode > 7)) { config->userMetaDataMode = 0; @@ -849,10 +1061,8 @@ static AACENC_ERROR aacEncInit(HANDLE_AACENCODER hAacEncoder, ((InitFlags & AACENC_INIT_CONFIG) || (InitFlags & AACENC_INIT_STATES)) ) { INT sbrError; - SBR_ELEMENT_INFO sbrElInfo[(6)]; + SBR_ELEMENT_INFO sbrElInfo[(8)]; CHANNEL_MAPPING channelMapping; - - AUDIO_OBJECT_TYPE aot = hAacConfig->audioObjectType; if ( FDKaacEnc_InitChannelMapping(hAacConfig->channelMode, hAacConfig->channelOrder, @@ -862,7 +1072,7 @@ static AACENC_ERROR aacEncInit(HANDLE_AACENCODER hAacEncoder, } /* Check return value and if the SBR encoder can handle enough elements */ - if (channelMapping.nElements > (6)) { + if (channelMapping.nElements > (8)) { return AACENC_INIT_ERROR; } @@ -881,15 +1091,17 @@ static AACENC_ERROR aacEncInit(HANDLE_AACENCODER hAacEncoder, &aacBufferOffset, &hAacConfig->nChannels, &hAacConfig->sampleRate, + &hAacConfig->sbrRatio, &frameLength, - &hAacConfig->audioObjectType, + hAacConfig->audioObjectType, &hAacEncoder->nDelay, (hAacConfig->audioObjectType == AOT_ER_AAC_ELD) ? 1 : TRANS_FAC, + (config->userTpHeaderPeriod!=0xFF) ? config->userTpHeaderPeriod : DEFAULT_HEADER_PERIOD_REPETITION_RATE, initFlag ); /* Suppress AOT reconfiguration and check error status. */ - if ( sbrError || (hAacConfig->audioObjectType!=aot) ) { + if (sbrError) { return AACENC_INIT_SBR_ERROR; } @@ -915,7 +1127,11 @@ static AACENC_ERROR aacEncInit(HANDLE_AACENCODER hAacEncoder, { UINT flags = 0; - FDKaacEnc_MapConfig(&hAacEncoder->coderConfig, config, hAacConfig); + FDKaacEnc_MapConfig( + &hAacEncoder->coderConfig, + config, + getSbrSignalingMode(hAacConfig->audioObjectType, config->userTpType, config->userTpSignaling, hAacConfig->sbrRatio), + hAacConfig); /* create flags for transport encoder */ if (config->userTpAmxv == 1) { @@ -958,7 +1174,7 @@ static AACENC_ERROR aacEncInit(HANDLE_AACENCODER hAacEncoder, INT inputDataDelay = DELAY_AAC(hAacConfig->framelength); if ( isSbrActive(hAacConfig) && hSbrEncoder!=NULL) { - inputDataDelay = 2*inputDataDelay + sbrEncoder_GetInputDataDelay(*hSbrEncoder); + inputDataDelay = hAacConfig->sbrRatio*inputDataDelay + sbrEncoder_GetInputDataDelay(*hSbrEncoder); } if ( FDK_MetadataEnc_Init(hAacEncoder->hMetadataEnc, @@ -1033,8 +1249,8 @@ AACENC_ERROR aacEncOpen( /* Determine max channel configuration. */ if (maxChannels==0) { - hAacEncoder->nMaxAacChannels = (6); - hAacEncoder->nMaxSbrChannels = (6); + hAacEncoder->nMaxAacChannels = (8); + hAacEncoder->nMaxSbrChannels = (8); } else { hAacEncoder->nMaxAacChannels = (maxChannels&0x00FF); @@ -1042,15 +1258,15 @@ AACENC_ERROR aacEncOpen( hAacEncoder->nMaxSbrChannels = (maxChannels&0xFF00) ? (maxChannels>>8) : hAacEncoder->nMaxAacChannels; } - if ( (hAacEncoder->nMaxAacChannels>(6)) || (hAacEncoder->nMaxSbrChannels>(6)) ) { + if ( (hAacEncoder->nMaxAacChannels>(8)) || (hAacEncoder->nMaxSbrChannels>(8)) ) { err = AACENC_INVALID_CONFIG; goto bail; } } /* maxChannels==0 */ /* Max number of elements could be tuned any more. */ - hAacEncoder->nMaxAacElements = fixMin((6), hAacEncoder->nMaxAacChannels); - hAacEncoder->nMaxSbrElements = fixMin((6), hAacEncoder->nMaxSbrChannels); + hAacEncoder->nMaxAacElements = fixMin((8), hAacEncoder->nMaxAacChannels); + hAacEncoder->nMaxSbrElements = fixMin((8), hAacEncoder->nMaxSbrChannels); hAacEncoder->nMaxSubFrames = (1); @@ -1108,7 +1324,7 @@ AACENC_ERROR aacEncOpen( goto bail; } else { - C_ALLOC_SCRATCH_START(pLibInfo, LIB_INFO, FDK_MODULE_LAST); + C_ALLOC_SCRATCH_START(pLibInfo, LIB_INFO, FDK_MODULE_LAST); FDKinitLibInfo( pLibInfo); transportEnc_GetLibInfo( pLibInfo ); @@ -1343,8 +1559,12 @@ AACENC_ERROR aacEncEncode( for (i=0; i<(INT)nMetaDataExtensions; i++) { /* Get meta data extension payload. */ hAacEncoder->extPayload[nExtensions++] = pMetaDataExtPayload[i]; } - if (matrix_mixdown_idx!=-1) { /* Set matrix mixdown coefficient. */ - UINT pceValue = (UINT)( (1<<3) | ((matrix_mixdown_idx&0x2)<<1) | 1 ); + + if ( (matrix_mixdown_idx!=-1) + && ((hAacEncoder->extParam.userChannelMode==MODE_1_2_2)||(hAacEncoder->extParam.userChannelMode==MODE_1_2_2_1)) ) + { + /* Set matrix mixdown coefficient. */ + UINT pceValue = (UINT)( (1<<3) | ((matrix_mixdown_idx&0x3)<<1) | 1 ); if (hAacEncoder->extParam.userPceAdditions != pceValue) { hAacEncoder->extParam.userPceAdditions = pceValue; hAacEncoder->InitFlags |= AACENC_INIT_TRANSPORT; @@ -1375,7 +1595,7 @@ AACENC_ERROR aacEncEncode( } else { /* Add SBR extension payload */ - for (i = 0; i < (6); i++) { + for (i = 0; i < (8); i++) { if (hAacEncoder->extPayloadSize[nPayload][i] > 0) { hAacEncoder->extPayload[nExtensions].pData = hAacEncoder->extPayloadData[nPayload][i]; { @@ -1573,7 +1793,6 @@ AACENC_ERROR aacEncoder_SetParam( } case AOT_AAC_LC: case AOT_MP2_AAC_LC: - case AOT_ER_AAC_LC: case AOT_ER_AAC_LD: case AOT_ER_AAC_ELD: if (!(hAacEncoder->encoder_modis & (ENC_MODE_FLAG_AAC))) { @@ -1636,7 +1855,7 @@ AACENC_ERROR aacEncoder_SetParam( } if ( (pConfig->nElements > hAacEncoder->nMaxAacElements) || (pConfig->nChannelsEff > hAacEncoder->nMaxAacChannels) - || !((value>=1) && (value<=6)) + || !(((value>=1) && (value<=7))||((value>=33) && (value<=34))) ) { err = AACENC_INVALID_CONFIG; @@ -1691,6 +1910,16 @@ AACENC_ERROR aacEncoder_SetParam( } } break; + case AACENC_SBR_RATIO: + if (settings->userSbrRatio != value) { + if (! ((value==0) || (value==1) || (value==2)) ) { + err = AACENC_INVALID_CONFIG; + break; + } + settings->userSbrRatio = value; + hAacEncoder->InitFlags |= AACENC_INIT_CONFIG | AACENC_INIT_STATES | AACENC_INIT_TRANSPORT; + } + break; case AACENC_SBR_MODE: if (settings->userSbrEnabled != value) { settings->userSbrEnabled = value; @@ -1812,7 +2041,7 @@ UINT aacEncoder_GetParam( value = (UINT)hAacEncoder->aacConfig.bitrateMode; break; case AACENC_SAMPLERATE: - value = (UINT)settings->userSamplerate; + value = (UINT)hAacEncoder->coderConfig.extSamplingRate; break; case AACENC_CHANNELMODE: value = (UINT)hAacEncoder->aacConfig.channelMode; @@ -1829,6 +2058,9 @@ UINT aacEncoder_GetParam( case AACENC_GRANULE_LENGTH: value = (UINT)hAacEncoder->aacConfig.framelength; break; + case AACENC_SBR_RATIO: + value = isSbrActive(&hAacEncoder->aacConfig) ? hAacEncoder->aacConfig.sbrRatio : 0; + break; case AACENC_SBR_MODE: value = (UINT) (hAacEncoder->aacConfig.syntaxFlags & AC_SBR_PRESENT) ? 1 : 0; break; @@ -1836,7 +2068,7 @@ UINT aacEncoder_GetParam( value = (UINT)settings->userTpType; break; case AACENC_SIGNALING_MODE: - value = (UINT)settings->userTpSignaling; + value = (UINT)getSbrSignalingMode(hAacEncoder->aacConfig.audioObjectType, settings->userTpType, settings->userTpSignaling, hAacEncoder->aacConfig.sbrRatio); break; case AACENC_PROTECTION: value = (UINT)settings->userTpProtection; |