Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 389 insertions, 0 deletions

diff --git a/libAACdec/src/channel.cpp b/libAACdec/src/channel.cpp
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+/*****************************  MPEG-4 AAC Decoder  **************************
+
+                        (C) Copyright Fraunhofer IIS (2004)
+                               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.
+
+
+   $Id$
+   Author(s):   Josef Hoepfl
+   Description:
+
+   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.
+
+******************************************************************************/
+
+#include "channel.h"
+#include "aacdecoder.h"
+#include "block.h"
+#include "aacdec_tns.h"
+#include "FDK_bitstream.h"
+#include "FDK_tools_rom.h"
+
+#include "conceal.h"
+
+#include "rvlc.h"
+
+#include "aacdec_hcr.h"
+
+
+static
+void MapMidSideMaskToPnsCorrelation (CAacDecoderChannelInfo *pAacDecoderChannelInfo[2])
+{
+  int group;
+
+  for (group = 0 ; group < pAacDecoderChannelInfo[L]->icsInfo.WindowGroups; group++) {
+    UCHAR groupMask = 1 << group;
+
+    for (UCHAR band = 0 ; band < pAacDecoderChannelInfo[L]->icsInfo.MaxSfBands; band++) {
+      if (pAacDecoderChannelInfo[L]->pComData->jointStereoData.MsUsed[band] & groupMask) { /* channels are correlated */
+        CPns_SetCorrelation(&pAacDecoderChannelInfo[L]->data.aac.PnsData, group, band, 0);
+
+        if (CPns_IsPnsUsed(&pAacDecoderChannelInfo[L]->data.aac.PnsData, group, band) &&
+            CPns_IsPnsUsed(&pAacDecoderChannelInfo[R]->data.aac.PnsData, group, band))
+          pAacDecoderChannelInfo[L]->pComData->jointStereoData.MsUsed[band] ^= groupMask; /* clear the groupMask-bit */
+      }
+    }
+  }
+}
+
+/*!
+  \brief Decode channel pair element
+
+  The function decodes a channel pair element.
+
+  \return  none
+*/
+void CChannelElement_Decode( CAacDecoderChannelInfo *pAacDecoderChannelInfo[2], /*!< pointer to aac decoder channel info */
+                             CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[2],
+                             SamplingRateInfo *pSamplingRateInfo,
+                             UINT  flags,
+                             int el_channels)
+{
+  int ch, maybe_jstereo = 0;
+
+  maybe_jstereo = (el_channels > 1);
+
+  for (ch = 0; ch < el_channels; ch++) {
+    if ( pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_IMDCT
+      || pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_ELDFB )
+    {
+      CBlock_InverseQuantizeSpectralData(pAacDecoderChannelInfo[ch], pSamplingRateInfo);
+    }
+  }
+
+
+
+  if (maybe_jstereo) {
+    /* apply ms */
+    if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) {
+      int maxSfBandsL = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[L]->icsInfo);
+      int maxSfBandsR = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[R]->icsInfo);
+      if (pAacDecoderChannelInfo[L]->data.aac.PnsData.PnsActive || pAacDecoderChannelInfo[R]->data.aac.PnsData.PnsActive) {
+        MapMidSideMaskToPnsCorrelation(pAacDecoderChannelInfo);
+      }
+
+      CJointStereo_ApplyMS(pAacDecoderChannelInfo,
+                           GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, pSamplingRateInfo),
+                           GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo),
+                           GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo),
+                           maxSfBandsL,
+                           maxSfBandsR);
+    }
+
+    /* apply intensity stereo */ /* modifies pAacDecoderChannelInfo[]->aSpecSfb */
+    CJointStereo_ApplyIS(pAacDecoderChannelInfo,
+                         GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, pSamplingRateInfo),
+                         GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo),
+                         GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo),
+                         GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[L]->icsInfo),
+                         pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow ? 1 : 0);
+
+  }
+
+  for (ch = 0; ch < el_channels; ch++)
+  {
+    {
+      /* write pAacDecoderChannelInfo[ch]->specScale */
+      CBlock_ScaleSpectralData(pAacDecoderChannelInfo[ch], pSamplingRateInfo);
+
+      ApplyTools (pAacDecoderChannelInfo, pSamplingRateInfo, flags, ch);
+    }
+
+  }
+
+  CRvlc_ElementCheck(
+          pAacDecoderChannelInfo,
+          pAacDecoderStaticChannelInfo,
+          flags,
+          el_channels
+          );
+}
+
+void CChannel_CodebookTableInit(CAacDecoderChannelInfo *pAacDecoderChannelInfo)
+{
+  int b, w, maxBands, maxWindows;
+  int maxSfb = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->icsInfo);
+  UCHAR *pCodeBook = pAacDecoderChannelInfo->pDynData->aCodeBook;
+
+  if ( IsLongBlock(&pAacDecoderChannelInfo->icsInfo) ) {
+    maxBands = 64;
+    maxWindows = 1;
+  } else {
+    maxBands = 16;
+    maxWindows = 8;
+  }
+
+  for (w = 0; w<maxWindows; w++) {
+    for (b = 0; b < maxSfb; b++) {
+      pCodeBook[b] = ESCBOOK;
+    }
+    for (; b<maxBands; b++) {
+      pCodeBook[b] = ZERO_HCB;
+    }
+    pCodeBook += maxBands;
+  }
+}
+
+
+/*
+ * Arbitrary order bitstream parser
+ */
+
+AAC_DECODER_ERROR CChannelElement_Read(HANDLE_FDK_BITSTREAM hBs,
+                                       CAacDecoderChannelInfo *pAacDecoderChannelInfo[],
+                                       CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[],
+                                       const AUDIO_OBJECT_TYPE aot,
+                                       const SamplingRateInfo *pSamplingRateInfo,
+                                       const UINT  flags,
+                                       const UINT  frame_length,
+                                       const UCHAR numberOfChannels,
+                                       const SCHAR epConfig,
+                                       HANDLE_TRANSPORTDEC pTpDec
+                                       )
+{
+  AAC_DECODER_ERROR error = AAC_DEC_OK;
+  const element_list_t *list;
+  int i, ch, decision_bit;
+  int crcReg1 = -1, crcReg2 = -1;
+
+  FDK_ASSERT( (numberOfChannels == 1) || (numberOfChannels == 2) );
+
+  /* Get channel element sequence table */
+  list = getBitstreamElementList(aot, epConfig, numberOfChannels, 0);
+  if (list == NULL) {
+    error = AAC_DEC_UNSUPPORTED_FORMAT;
+    goto bail;
+  }
+
+  CTns_Reset(&pAacDecoderChannelInfo[0]->pDynData->TnsData);
+  if (numberOfChannels == 2) {
+    CTns_Reset(&pAacDecoderChannelInfo[1]->pDynData->TnsData);
+  }
+
+  if (flags & (AC_ELD|AC_SCALABLE)) {
+    pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow = 1;
+    if (numberOfChannels == 2) {
+      pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow;
+    }
+    if (numberOfChannels == 2) {
+      pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow;
+    }
+  }
+
+  /* Iterate through sequence table */
+  i = 0;
+  ch = 0;
+  decision_bit = 0;
+  do {
+    switch (list->id[i]) {
+    case element_instance_tag:
+      pAacDecoderChannelInfo[0]->ElementInstanceTag = FDKreadBits(hBs, 4);
+      if (numberOfChannels == 2) {
+        pAacDecoderChannelInfo[1]->ElementInstanceTag = pAacDecoderChannelInfo[0]->ElementInstanceTag;
+      }
+      break;
+    case common_window:
+      decision_bit = pAacDecoderChannelInfo[ch]->pDynData->RawDataInfo.CommonWindow = FDKreadBits(hBs, 1);
+      if (numberOfChannels == 2) {
+        pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow;
+      }
+      break;
+    case ics_info:
+      /* Read individual channel info */
+      error = IcsRead( hBs,
+                      &pAacDecoderChannelInfo[ch]->icsInfo,
+                       pSamplingRateInfo,
+                       flags );
+
+      if (numberOfChannels == 2 && pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow) {
+        pAacDecoderChannelInfo[1]->icsInfo = pAacDecoderChannelInfo[0]->icsInfo;
+      }
+      break;
+
+
+    case ltp_data_present:
+      if (FDKreadBits(hBs, 1) != 0) {
+        error = AAC_DEC_UNSUPPORTED_PREDICTION;
+      }
+      break;
+
+    case ms:
+      if ( CJointStereo_Read(
+              hBs,
+             &pAacDecoderChannelInfo[0]->pComData->jointStereoData, 
+              GetWindowGroups(&pAacDecoderChannelInfo[0]->icsInfo),
+              GetScaleMaxFactorBandsTransmitted(&pAacDecoderChannelInfo[0]->icsInfo,
+                                                &pAacDecoderChannelInfo[1]->icsInfo),
+              flags) )
+      {
+        error = AAC_DEC_PARSE_ERROR;
+      }
+      break;
+
+    case global_gain:
+      pAacDecoderChannelInfo[ch]->pDynData->RawDataInfo.GlobalGain = (UCHAR) FDKreadBits(hBs,8);
+      break;
+
+    case section_data:
+      error = CBlock_ReadSectionData( hBs,
+                                      pAacDecoderChannelInfo[ch],
+                                      pSamplingRateInfo,
+                                      flags );
+      break;
+
+
+    case scale_factor_data:
+      if (flags & AC_ER_RVLC) {
+        /* read RVLC data from bitstream (error sens. cat. 1) */ 
+        CRvlc_Read(pAacDecoderChannelInfo[ch], hBs);
+      }
+      else
+      {
+        error = CBlock_ReadScaleFactorData(pAacDecoderChannelInfo[ch], hBs, flags);
+      }
+      break;
+
+    case pulse:
+      if ( CPulseData_Read( hBs,
+                           &pAacDecoderChannelInfo[ch]->pDynData->specificTo.aac.PulseData,
+                            pSamplingRateInfo->ScaleFactorBands_Long, /* pulse data is only allowed to be present in long blocks! */
+                            (void*)&pAacDecoderChannelInfo[ch]->icsInfo,
+                            frame_length
+                          ) != 0 )
+      {
+        error = AAC_DEC_DECODE_FRAME_ERROR;
+      }
+      break;
+    case tns_data_present:
+      CTns_ReadDataPresentFlag(hBs, &pAacDecoderChannelInfo[ch]->pDynData->TnsData);
+      break;
+    case tns_data:
+      /* tns_data_present is checked inside CTns_Read(). */
+      error = CTns_Read(hBs, &pAacDecoderChannelInfo[ch]->pDynData->TnsData, &pAacDecoderChannelInfo[ch]->icsInfo, flags);
+      break;
+
+    case gain_control_data:
+      break;
+    
+    case gain_control_data_present:
+      if (FDKreadBits(hBs, 1)) {
+        error = AAC_DEC_UNSUPPORTED_GAIN_CONTROL_DATA;
+      }
+      break;
+
+    case esc2_rvlc:
+      if (flags & AC_ER_RVLC) {
+        CRvlc_Decode(
+                pAacDecoderChannelInfo[ch],
+                pAacDecoderStaticChannelInfo[ch],
+                hBs
+                );
+      }
+      break;
+
+    case esc1_hcr:
+      if (flags & AC_ER_HCR) {
+        CHcr_Read(hBs, pAacDecoderChannelInfo[ch] );
+      }
+      break;
+
+    case spectral_data:
+      error = CBlock_ReadSpectralData( hBs,
+                                       pAacDecoderChannelInfo[ch],
+                                       pSamplingRateInfo,
+                                       flags );
+      if (flags & AC_ELD) {
+        pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_ELDFB;
+      } else {
+        pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_IMDCT;
+      }
+      break;
+
+
+      /* CRC handling */
+    case adtscrc_start_reg1:
+      if (pTpDec != NULL) {
+        crcReg1 = transportDec_CrcStartReg(pTpDec, 192);
+      }
+      break;
+    case adtscrc_start_reg2:
+      if (pTpDec != NULL) {
+        crcReg2 = transportDec_CrcStartReg(pTpDec, 128);
+      }
+      break;
+    case adtscrc_end_reg1:
+    case drmcrc_end_reg:
+      if (pTpDec != NULL) {
+        transportDec_CrcEndReg(pTpDec, crcReg1);
+      }
+      break;
+    case adtscrc_end_reg2:
+      if (pTpDec != NULL) {
+        transportDec_CrcEndReg(pTpDec, crcReg2);
+      }
+      break;
+    case drmcrc_start_reg:
+      if (pTpDec != NULL) {
+        crcReg1 = transportDec_CrcStartReg(pTpDec, 0);
+      }
+      break;
+
+      /* Non data cases */
+    case next_channel:
+      ch = (ch + 1) % numberOfChannels;
+      break;
+    case link_sequence:
+      list = list->next[decision_bit];
+      i=-1;
+      break;
+
+    default:
+      error = AAC_DEC_UNSUPPORTED_FORMAT;
+      break;
+    }
+
+    if (error != AAC_DEC_OK) {
+      goto bail;
+    }
+
+    i++;
+
+  } while (list->id[i] != end_of_sequence);
+
+bail:
+  return error;
+}