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Diffstat (limited to 'libAACenc/src/mps_main.cpp')
| -rw-r--r-- | libAACenc/src/mps_main.cpp | 529 |
1 files changed, 529 insertions, 0 deletions
diff --git a/libAACenc/src/mps_main.cpp b/libAACenc/src/mps_main.cpp new file mode 100644 index 0000000..1048228 --- /dev/null +++ b/libAACenc/src/mps_main.cpp @@ -0,0 +1,529 @@ +/* ----------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2018 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 +amm-info@iis.fraunhofer.de +----------------------------------------------------------------------------- */ + +/**************************** AAC encoder library ****************************** + + Author(s): Markus Lohwasser + + Description: Mpeg Surround library interface functions + +*******************************************************************************/ + +/* Includes ******************************************************************/ +#include "mps_main.h" +#include "sacenc_lib.h" + +/* Data Types ****************************************************************/ +struct MPS_ENCODER { + HANDLE_MP4SPACE_ENCODER hSacEncoder; + + AUDIO_OBJECT_TYPE audioObjectType; + + FDK_bufDescr inBufDesc; + FDK_bufDescr outBufDesc; + SACENC_InArgs inargs; + SACENC_OutArgs outargs; + + void *pInBuffer[1]; + UINT pInBufferSize[1]; + UINT pInBufferElSize[1]; + UINT pInBufferType[1]; + + void *pOutBuffer[2]; + UINT pOutBufferSize[2]; + UINT pOutBufferElSize[2]; + UINT pOutBufferType[2]; + + UCHAR sacOutBuffer[1024]; /* Worst case memory consumption for ELDv2: 768 + bytes => 6144 bits (Core + SBR + MPS) */ +}; + +struct MPS_CONFIG_TAB { + AUDIO_OBJECT_TYPE audio_object_type; + CHANNEL_MODE channel_mode; + ULONG sbr_ratio; + ULONG sampling_rate; + ULONG bitrate_min; + ULONG bitrate_max; +}; + +/* Constants *****************************************************************/ +static const MPS_CONFIG_TAB mpsConfigTab[] = { + {AOT_ER_AAC_ELD, MODE_212, 0, 16000, 16000, 39999}, + {AOT_ER_AAC_ELD, MODE_212, 0, 22050, 16000, 49999}, + {AOT_ER_AAC_ELD, MODE_212, 0, 24000, 16000, 61999}, + {AOT_ER_AAC_ELD, MODE_212, 0, 32000, 20000, 84999}, + {AOT_ER_AAC_ELD, MODE_212, 0, 44100, 50000, 192000}, + {AOT_ER_AAC_ELD, MODE_212, 0, 48000, 62000, 192000}, + + {AOT_ER_AAC_ELD, MODE_212, 1, 16000, 18000, 31999}, + {AOT_ER_AAC_ELD, MODE_212, 1, 22050, 18000, 31999}, + {AOT_ER_AAC_ELD, MODE_212, 1, 24000, 20000, 64000}, + + {AOT_ER_AAC_ELD, MODE_212, 2, 32000, 18000, 64000}, + {AOT_ER_AAC_ELD, MODE_212, 2, 44100, 21000, 64000}, + {AOT_ER_AAC_ELD, MODE_212, 2, 48000, 26000, 64000} + +}; + +/* Function / Class Declarations *********************************************/ + +/* Function / Class Definition ***********************************************/ +static INT FDK_MpegsEnc_WriteFrameHeader(HANDLE_MPS_ENCODER hMpsEnc, + UCHAR *const pOutputBuffer, + const int outputBufferSize); + +MPS_ENCODER_ERROR FDK_MpegsEnc_Open(HANDLE_MPS_ENCODER *phMpsEnc) { + MPS_ENCODER_ERROR error = MPS_ENCODER_OK; + HANDLE_MPS_ENCODER hMpsEnc = NULL; + + if (phMpsEnc == NULL) { + error = MPS_ENCODER_INVALID_HANDLE; + goto bail; + } + + if (NULL == + (hMpsEnc = (HANDLE_MPS_ENCODER)FDKcalloc(1, sizeof(MPS_ENCODER)))) { + error = MPS_ENCODER_MEMORY_ERROR; + goto bail; + } + FDKmemclear(hMpsEnc, sizeof(MPS_ENCODER)); + + if (SACENC_OK != FDK_sacenc_open(&hMpsEnc->hSacEncoder)) { + error = MPS_ENCODER_MEMORY_ERROR; + goto bail; + } + + /* Return mps encoder instance */ + *phMpsEnc = hMpsEnc; + +bail: + if (error != MPS_ENCODER_OK) { + FDK_MpegsEnc_Close(&hMpsEnc); + } + return error; +} + +MPS_ENCODER_ERROR FDK_MpegsEnc_Close(HANDLE_MPS_ENCODER *phMpsEnc) { + MPS_ENCODER_ERROR error = MPS_ENCODER_OK; + + if (phMpsEnc == NULL) { + error = MPS_ENCODER_INVALID_HANDLE; + goto bail; + } + + if (*phMpsEnc != NULL) { + FDK_sacenc_close(&(*phMpsEnc)->hSacEncoder); + FDKfree(*phMpsEnc); + *phMpsEnc = NULL; + } +bail: + return error; +} + +MPS_ENCODER_ERROR FDK_MpegsEnc_Init(HANDLE_MPS_ENCODER hMpsEnc, + const AUDIO_OBJECT_TYPE audioObjectType, + const UINT samplingrate, const UINT bitrate, + const UINT sbrRatio, const UINT framelength, + const UINT inputBufferSizePerChannel, + const UINT coreCoderDelay) { + MPS_ENCODER_ERROR error = MPS_ENCODER_OK; + const UINT fs_low = 27713; /* low MPS sampling frequencies */ + const UINT fs_high = 55426; /* high MPS sampling frequencies */ + UINT nTimeSlots = 0, nQmfBandsLd = 0; + + if (hMpsEnc == NULL) { + error = MPS_ENCODER_INVALID_HANDLE; + goto bail; + } + + /* Combine MPS with SBR only if the number of QMF band fits together.*/ + switch (sbrRatio) { + case 1: /* downsampled sbr - 32 QMF bands required */ + if (!(samplingrate < fs_low)) { + error = MPS_ENCODER_INIT_ERROR; + goto bail; + } + break; + case 2: /* dualrate - 64 QMF bands required */ + if (!((samplingrate >= fs_low) && (samplingrate < fs_high))) { + error = MPS_ENCODER_INIT_ERROR; + goto bail; + } + break; + case 0: + default:; /* time interface - no samplingrate restriction */ + } + + /* 32 QMF-Bands ( fs < 27713 ) + * 64 QMF-Bands ( 27713 >= fs <= 55426 ) + * 128 QMF-Bands ( fs > 55426 ) + */ + nQmfBandsLd = + (samplingrate < fs_low) ? 5 : ((samplingrate > fs_high) ? 7 : 6); + nTimeSlots = framelength >> nQmfBandsLd; + + /* check if number of qmf bands is usable for given framelength */ + if (framelength != (nTimeSlots << nQmfBandsLd)) { + error = MPS_ENCODER_INIT_ERROR; + goto bail; + } + + /* is given bitrate intended to be supported */ + if ((INT)bitrate != FDK_MpegsEnc_GetClosestBitRate(audioObjectType, MODE_212, + samplingrate, sbrRatio, + bitrate)) { + error = MPS_ENCODER_INIT_ERROR; + goto bail; + } + + /* init SAC library */ + switch (audioObjectType) { + case AOT_ER_AAC_ELD: { + const UINT noInterFrameCoding = 0; + + if ((SACENC_OK != + FDK_sacenc_setParam(hMpsEnc->hSacEncoder, SACENC_LOWDELAY, + (noInterFrameCoding == 1) ? 1 : 2)) || + (SACENC_OK != FDK_sacenc_setParam(hMpsEnc->hSacEncoder, + SACENC_ENC_MODE, SACENC_212)) || + (SACENC_OK != FDK_sacenc_setParam(hMpsEnc->hSacEncoder, + SACENC_SAMPLERATE, samplingrate)) || + (SACENC_OK != FDK_sacenc_setParam(hMpsEnc->hSacEncoder, + SACENC_FRAME_TIME_SLOTS, + nTimeSlots)) || + (SACENC_OK != FDK_sacenc_setParam(hMpsEnc->hSacEncoder, + SACENC_PARAM_BANDS, + SACENC_BANDS_15)) || + (SACENC_OK != + FDK_sacenc_setParam(hMpsEnc->hSacEncoder, SACENC_TIME_DOM_DMX, 2)) || + (SACENC_OK != + FDK_sacenc_setParam(hMpsEnc->hSacEncoder, SACENC_COARSE_QUANT, 0)) || + (SACENC_OK != FDK_sacenc_setParam(hMpsEnc->hSacEncoder, + SACENC_QUANT_MODE, + SACENC_QUANTMODE_FINE)) || + (SACENC_OK != FDK_sacenc_setParam(hMpsEnc->hSacEncoder, + SACENC_TIME_ALIGNMENT, 0)) || + (SACENC_OK != FDK_sacenc_setParam(hMpsEnc->hSacEncoder, + SACENC_INDEPENDENCY_FACTOR, 20))) { + error = MPS_ENCODER_INIT_ERROR; + goto bail; + } + break; + } + default: + error = MPS_ENCODER_INIT_ERROR; + goto bail; + } + + if (SACENC_OK != FDK_sacenc_init(hMpsEnc->hSacEncoder, coreCoderDelay)) { + error = MPS_ENCODER_INIT_ERROR; + } + + hMpsEnc->audioObjectType = audioObjectType; + + hMpsEnc->inBufDesc.ppBase = (void **)&hMpsEnc->pInBuffer; + hMpsEnc->inBufDesc.pBufSize = hMpsEnc->pInBufferSize; + hMpsEnc->inBufDesc.pEleSize = hMpsEnc->pInBufferElSize; + hMpsEnc->inBufDesc.pBufType = hMpsEnc->pInBufferType; + hMpsEnc->inBufDesc.numBufs = 1; + + hMpsEnc->outBufDesc.ppBase = (void **)&hMpsEnc->pOutBuffer; + hMpsEnc->outBufDesc.pBufSize = hMpsEnc->pOutBufferSize; + hMpsEnc->outBufDesc.pEleSize = hMpsEnc->pOutBufferElSize; + hMpsEnc->outBufDesc.pBufType = hMpsEnc->pOutBufferType; + hMpsEnc->outBufDesc.numBufs = 2; + + hMpsEnc->pInBuffer[0] = NULL; + hMpsEnc->pInBufferSize[0] = 0; + hMpsEnc->pInBufferElSize[0] = sizeof(INT_PCM); + hMpsEnc->pInBufferType[0] = (FDK_BUF_TYPE_INPUT | FDK_BUF_TYPE_PCM_DATA); + + hMpsEnc->pOutBuffer[0] = NULL; + hMpsEnc->pOutBufferSize[0] = 0; + hMpsEnc->pOutBufferElSize[0] = sizeof(INT_PCM); + hMpsEnc->pOutBufferType[0] = (FDK_BUF_TYPE_OUTPUT | FDK_BUF_TYPE_PCM_DATA); + + hMpsEnc->pOutBuffer[1] = NULL; + hMpsEnc->pOutBufferSize[1] = 0; + hMpsEnc->pOutBufferElSize[1] = sizeof(UCHAR); + hMpsEnc->pOutBufferType[1] = (FDK_BUF_TYPE_OUTPUT | FDK_BUF_TYPE_BS_DATA); + + hMpsEnc->inargs.isInputInterleaved = 0; + hMpsEnc->inargs.inputBufferSizePerChannel = inputBufferSizePerChannel; + +bail: + return error; +} + +MPS_ENCODER_ERROR FDK_MpegsEnc_Process(HANDLE_MPS_ENCODER hMpsEnc, + INT_PCM *const pAudioSamples, + const INT nAudioSamples, + AACENC_EXT_PAYLOAD *pMpsExtPayload) { + MPS_ENCODER_ERROR error = MPS_ENCODER_OK; + + if (hMpsEnc == NULL) { + error = MPS_ENCODER_INVALID_HANDLE; + } else { + int sacHeaderFlag = 1; + int sacOutBufferOffset = 0; + + /* In case of eld the ssc is explicit and doesn't need to be inband */ + if (hMpsEnc->audioObjectType == AOT_ER_AAC_ELD) { + sacHeaderFlag = 0; + } + + /* 4 bits nibble after extension type */ + hMpsEnc->sacOutBuffer[0] = (sacHeaderFlag == 0) ? 0x3 : 0x7; + sacOutBufferOffset += 1; + + if (sacHeaderFlag) { + sacOutBufferOffset += FDK_MpegsEnc_WriteFrameHeader( + hMpsEnc, &hMpsEnc->sacOutBuffer[sacOutBufferOffset], + sizeof(hMpsEnc->sacOutBuffer) - sacOutBufferOffset); + } + + /* Register input and output buffer. */ + hMpsEnc->pInBuffer[0] = (void *)pAudioSamples; + hMpsEnc->inargs.nInputSamples = nAudioSamples; + + hMpsEnc->pOutBuffer[0] = (void *)pAudioSamples; + hMpsEnc->pOutBufferSize[0] = sizeof(INT_PCM) * nAudioSamples / 2; + + hMpsEnc->pOutBuffer[1] = (void *)&hMpsEnc->sacOutBuffer[sacOutBufferOffset]; + hMpsEnc->pOutBufferSize[1] = + sizeof(hMpsEnc->sacOutBuffer) - sacOutBufferOffset; + + /* encode SAC frame */ + if (SACENC_OK != FDK_sacenc_encode(hMpsEnc->hSacEncoder, + &hMpsEnc->inBufDesc, + &hMpsEnc->outBufDesc, &hMpsEnc->inargs, + &hMpsEnc->outargs)) { + error = MPS_ENCODER_ENCODE_ERROR; + goto bail; + } + + /* export MPS payload */ + pMpsExtPayload->pData = (UCHAR *)hMpsEnc->sacOutBuffer; + pMpsExtPayload->dataSize = + hMpsEnc->outargs.nOutputBits + 8 * (sacOutBufferOffset - 1); + pMpsExtPayload->dataType = EXT_LDSAC_DATA; + pMpsExtPayload->associatedChElement = -1; + } + +bail: + return error; +} + +INT FDK_MpegsEnc_WriteSpatialSpecificConfig(HANDLE_MPS_ENCODER hMpsEnc, + HANDLE_FDK_BITSTREAM hBs) { + INT sscBits = 0; + + if (NULL != hMpsEnc) { + MP4SPACEENC_INFO mp4SpaceEncoderInfo; + FDK_sacenc_getInfo(hMpsEnc->hSacEncoder, &mp4SpaceEncoderInfo); + + if (hBs != NULL) { + int i; + int writtenBits = 0; + for (i = 0; i<mp4SpaceEncoderInfo.pSscBuf->nSscSizeBits>> 3; i++) { + FDKwriteBits(hBs, mp4SpaceEncoderInfo.pSscBuf->pSsc[i], 8); + writtenBits += 8; + } + FDKwriteBits(hBs, mp4SpaceEncoderInfo.pSscBuf->pSsc[i], + mp4SpaceEncoderInfo.pSscBuf->nSscSizeBits - writtenBits); + } /* hBS */ + + sscBits = mp4SpaceEncoderInfo.pSscBuf->nSscSizeBits; + + } /* valid hMpsEnc */ + + return sscBits; +} + +static INT FDK_MpegsEnc_WriteFrameHeader(HANDLE_MPS_ENCODER hMpsEnc, + UCHAR *const pOutputBuffer, + const int outputBufferSize) { + const int sacTimeAlignFlag = 0; + + /* Initialize variables */ + int numBits = 0; + + if ((NULL != hMpsEnc) && (NULL != pOutputBuffer)) { + UINT alignAnchor, cnt; + FDK_BITSTREAM Bs; + FDKinitBitStream(&Bs, pOutputBuffer, outputBufferSize, 0, BS_WRITER); + + /* Calculate SSC length information */ + cnt = (FDK_MpegsEnc_WriteSpatialSpecificConfig(hMpsEnc, NULL) + 7) >> 3; + + /* Write SSC */ + FDKwriteBits(&Bs, sacTimeAlignFlag, 1); + + if (cnt < 127) { + FDKwriteBits(&Bs, cnt, 7); + } else { + FDKwriteBits(&Bs, 127, 7); + FDKwriteBits(&Bs, cnt - 127, 16); + } + + alignAnchor = FDKgetValidBits(&Bs); + FDK_MpegsEnc_WriteSpatialSpecificConfig(hMpsEnc, &Bs); + FDKbyteAlign(&Bs, alignAnchor); /* bsFillBits */ + + if (sacTimeAlignFlag) { + FDK_ASSERT(1); /* time alignment not supported */ + } + + numBits = FDKgetValidBits(&Bs); + } /* valid handle */ + + return ((numBits + 7) >> 3); +} + +INT FDK_MpegsEnc_GetClosestBitRate(const AUDIO_OBJECT_TYPE audioObjectType, + const CHANNEL_MODE channelMode, + const UINT samplingrate, const UINT sbrRatio, + const UINT bitrate) { + unsigned int i; + int targetBitrate = -1; + + for (i = 0; i < sizeof(mpsConfigTab) / sizeof(MPS_CONFIG_TAB); i++) { + if ((mpsConfigTab[i].audio_object_type == audioObjectType) && + (mpsConfigTab[i].channel_mode == channelMode) && + (mpsConfigTab[i].sbr_ratio == sbrRatio) && + (mpsConfigTab[i].sampling_rate == samplingrate)) { + targetBitrate = fMin(fMax(bitrate, mpsConfigTab[i].bitrate_min), + mpsConfigTab[i].bitrate_max); + } + } + + return targetBitrate; +} + +INT FDK_MpegsEnc_GetDelay(HANDLE_MPS_ENCODER hMpsEnc) { + INT delay = 0; + + if (NULL != hMpsEnc) { + MP4SPACEENC_INFO mp4SpaceEncoderInfo; + FDK_sacenc_getInfo(hMpsEnc->hSacEncoder, &mp4SpaceEncoderInfo); + delay = mp4SpaceEncoderInfo.nCodecDelay; + } + + return delay; +} + +INT FDK_MpegsEnc_GetDecDelay(HANDLE_MPS_ENCODER hMpsEnc) { + INT delay = 0; + + if (NULL != hMpsEnc) { + MP4SPACEENC_INFO mp4SpaceEncoderInfo; + FDK_sacenc_getInfo(hMpsEnc->hSacEncoder, &mp4SpaceEncoderInfo); + delay = mp4SpaceEncoderInfo.nDecoderDelay; + } + + return delay; +} + +MPS_ENCODER_ERROR FDK_MpegsEnc_GetLibInfo(LIB_INFO *info) { + MPS_ENCODER_ERROR error = MPS_ENCODER_OK; + + if (NULL == info) { + error = MPS_ENCODER_INVALID_HANDLE; + } else if (SACENC_OK != FDK_sacenc_getLibInfo(info)) { + error = MPS_ENCODER_INIT_ERROR; + } + + return error; +} |