--- a/videoeditorengine/mp3aacManipLib/AACGain/src/sbr_demux.cpp Fri Jan 29 14:08:33 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,594 +0,0 @@
-/*
-* Copyright (c) 2010 Ixonos Plc.
-* All rights reserved.
-* This component and the accompanying materials are made available
-* under the terms of the "Eclipse Public License v1.0"
-* which accompanies this distribution, and is available
-* at the URL "http://www.eclipse.org/legal/epl-v10.html".
-*
-* Initial Contributors:
-* Nokia Corporation - Initial contribution
-*
-* Contributors:
-* Ixonos Plc
-*
-* Description:
-*
-*/
-
-
-/*
- \file
- \brief SBR codec implementation $Revision: 1.1.1.1.4.1 $
-*/
-
-/**************************************************************************
- sbr_demux.cpp - SBR bitstream demultiplexer implementations.
-
- Author(s): Juha Ojanpera
- Copyright (c) 2004 by Nokia Research Center, Multimedia Technologies.
- *************************************************************************/
-
-/*-- Project Headers. --*/
-#include "sbr_rom.h"
-#include "env_extr.h"
-
-typedef const int8 (*Huffman)[2];
-
-/*
- \brief Decodes Huffman codeword from TBitStream
-
- \return Decoded Huffman value.
-*/
-int16
-DecodeHuffmanCW(Huffman h, TBitStream *bs)
-{
- int16 value, bit, index = 0;
-
- while(index >= 0)
- {
- bit = (int16) BsGetBits(bs, 1);
- index = h[index][bit];
- }
-
- value = index + 64;
-
- return (value);
-}
-
-/*
- \brief Reads direction control data from TBitStream
-*/
-void
-sbrGetDTDFData(SbrFrameData *frameData, TBitStream *bs)
-{
- frameData->domain_vec = (uint8) BsGetBits(bs, frameData->frameInfo.nEnvelopes);
- frameData->domain_vec_noise = (uint8) BsGetBits(bs, frameData->frameInfo.nNoiseEnvelopes);
-}
-
-/*
- \brief Reads noise-floor-level data from TBitStream
-*/
-void
-sbrGetNoiseFloorData(SbrHeaderData *headerData, SbrFrameData *frameData, TBitStream *bs)
-{
- int16 i, j, k, noNoiseBands;
- Huffman hcb_noiseF, hcb_noise;
-
- noNoiseBands = headerData->hFreqBandData->nNfb;
-
- if(frameData->coupling == COUPLING_BAL)
- {
- hcb_noise = (Huffman) &sbr_huffBook_NoiseBalance11T;
- hcb_noiseF = (Huffman) &sbr_huffBook_EnvBalance11F;
- }
- else
- {
- hcb_noise = (Huffman) &sbr_huffBook_NoiseLevel11T;
- hcb_noiseF = (Huffman) &sbr_huffBook_EnvLevel11F;
- }
-
- k = SBR_BIT_ARRAY_SIZE - frameData->frameInfo.nNoiseEnvelopes;
- for(i = 0; i < frameData->frameInfo.nNoiseEnvelopes; i++, k++)
- {
- uint8 codValue;
- int16 index = i * noNoiseBands;
-
- codValue = frameData->domain_vec_noise & bitArray[k];
-
- if(!codValue)
- {
- frameData->sbrNoiseFloorLevel[index++] = (int16) BsGetBits(bs, 5);
-
- for(j = 1; j < noNoiseBands; j++, index++)
- frameData->sbrNoiseFloorLevel[index] = DecodeHuffmanCW(hcb_noiseF, bs);
- }
- else
- {
- for(j = 0; j < noNoiseBands; j++, index++)
- frameData->sbrNoiseFloorLevel[index] = DecodeHuffmanCW(hcb_noise, bs);
- }
- }
-}
-
-/*
- \brief Reads envelope data from TBitStream
-
- \return One on success.
-*/
-int16
-sbrGetEnvelope(SbrHeaderData *headerData, SbrFrameData *frameData, TBitStream *bs, int16 decVal)
-{
- Huffman hcb_t, hcb_f;
- uint8 no_band[MAX_ENVELOPES];
- int16 i, j, k, delta, offset, ampRes;
- int16 start_bits, start_bits_balance;
-
- ampRes = headerData->ampResolution;
- if(frameData->frameInfo.frameClass == FIXFIX && frameData->frameInfo.nEnvelopes == 1)
- ampRes = SBR_AMP_RES_1_5;
-
- if(ampRes == SBR_AMP_RES_3_0)
- {
- start_bits = 6;
- start_bits_balance = 5;
- }
- else
- {
- start_bits = 7;
- start_bits_balance = 6;
- }
-
- k = SBR_BIT_ARRAY_SIZE - frameData->frameInfo.nEnvelopes;
- for(i = 0; i < frameData->frameInfo.nEnvelopes; i++, k++)
- {
- uint8 resValue = (frameData->frameInfo.freqRes & bitArray[k]) ? 1 : 0;
-
- no_band[i] = headerData->hFreqBandData->nSfb[resValue];
- }
-
- if(frameData->coupling == COUPLING_BAL)
- {
- if(ampRes == SBR_AMP_RES_1_5)
- {
- hcb_t = (Huffman) &sbr_huffBook_EnvBalance10T;
- hcb_f = (Huffman) &sbr_huffBook_EnvBalance10F;
- }
- else
- {
- hcb_t = (Huffman) &sbr_huffBook_EnvBalance11T;
- hcb_f = (Huffman) &sbr_huffBook_EnvBalance11F;
- }
- }
- else
- {
- if(ampRes == SBR_AMP_RES_1_5)
- {
- hcb_t = (Huffman) &sbr_huffBook_EnvLevel10T;
- hcb_f = (Huffman) &sbr_huffBook_EnvLevel10F;
- }
- else
- {
- hcb_t = (Huffman) &sbr_huffBook_EnvLevel11T;
- hcb_f = (Huffman) &sbr_huffBook_EnvLevel11F;
- }
- }
-
- decVal = (ampRes) ? decVal : decVal << 1;
-
- k = SBR_BIT_ARRAY_SIZE - frameData->frameInfo.nEnvelopes;
- for(j = 0, offset = 0; j < frameData->frameInfo.nEnvelopes; j++, k++)
- {
- uint8 codValue = frameData->domain_vec & bitArray[k];
-
- if(!codValue)
- {
- if(frameData->coupling == COUPLING_BAL)
- frameData->iEnvelope[offset] = (int16) BsGetBits(bs, start_bits_balance);
- else
- {
- frameData->iEnvelope[offset] = (int16) BsGetBits(bs, start_bits);
-
- frameData->iEnvelope[offset] -= decVal;
- if(frameData->iEnvelope[offset] < 0)
- frameData->iEnvelope[offset] = 0;
- }
- }
-
- for(i = (1 - ((codValue) ? 1 : 0)); i < no_band[j]; i++)
- {
- if(!codValue)
- delta = DecodeHuffmanCW(hcb_f, bs);
- else
- {
- delta = DecodeHuffmanCW(hcb_t, bs);
-
- if(i == 0)
- delta -= decVal;
- }
-
- frameData->iEnvelope[offset + i] = delta;
- }
-
- offset += no_band[j];
- }
-
- return (1);
-}
-
-/*
- \brief Extracts the frame information from the TBitStream
-
- \return One on success
-*/
-int16
-sbrReadGridInfo(TBitStream *bs, SbrHeaderData *headerData, SbrFrameData *frameData)
-{
- uint8 tmp;
- FRAME_INFO *frameInfo;
- SbrGridInfo *sbrGridInfo;
- int16 pointer_bits, nEnv, k, staticFreqRes;
-
- nEnv = 0;
- frameInfo = &frameData->frameInfo;
- sbrGridInfo = &frameData->sbrGridInfo;
-
- frameInfo->frameClass = (uint8) BsGetBits(bs, 2);
-
- switch(frameInfo->frameClass)
- {
- case FIXFIX:
- sbrGridInfo->bs_num_env = (uint8) BsGetBits(bs, 2);
- staticFreqRes = (int16) BsGetBits(bs, 1);
- nEnv = (int16) (1 << sbrGridInfo->bs_num_env);
-
- if(sbrGridInfo->bs_num_env < 3 && headerData->numberTimeSlots == 16)
- COPY_MEMORY(frameInfo, &(sbr_staticFrameInfo[sbrGridInfo->bs_num_env]), sizeof(FRAME_INFO));
-
- if(!staticFreqRes)
- frameInfo->freqRes = 0;
- break;
-
- case FIXVAR:
- case VARFIX:
- sbrGridInfo->bs_var_board[0] = (uint8) BsGetBits(bs, 2);
- sbrGridInfo->bs_num_env = (uint8) BsGetBits(bs, 2);
- nEnv = sbrGridInfo->bs_num_env + 1;
-
- for(k = 0; k < sbrGridInfo->bs_num_env; k++)
- sbrGridInfo->bs_rel_board_0[k] = (uint8) BsGetBits(bs, 2);
-
- pointer_bits = (int16) (FloatFR_logDualis(sbrGridInfo->bs_num_env + 2) + 0.992188f);
- sbrGridInfo->bs_pointer = (uint8) BsGetBits(bs, pointer_bits);
- break;
- }
-
- switch(frameInfo->frameClass)
- {
- case FIXVAR:
- frameInfo->freqRes = 0;
- tmp = (uint8) BsGetBits(bs, sbrGridInfo->bs_num_env + 1);
- for(k = sbrGridInfo->bs_num_env; k >= 0; k--)
- {
- frameInfo->freqRes <<= 1;
- frameInfo->freqRes |= tmp & 0x1;
- tmp >>= 1;
- }
- break;
-
- case VARFIX:
- frameInfo->freqRes = (uint8) BsGetBits(bs, sbrGridInfo->bs_num_env + 1);
- break;
-
- case VARVAR:
- sbrGridInfo->bs_var_board[0] = (uint8) BsGetBits(bs, 2);
- sbrGridInfo->bs_var_board[1] = (uint8) BsGetBits(bs, 2);
- sbrGridInfo->bs_num_rel[0] = (uint8) BsGetBits(bs, 2);
- sbrGridInfo->bs_num_rel[1] = (uint8) BsGetBits(bs, 2);
-
- nEnv = sbrGridInfo->bs_num_rel[0] + sbrGridInfo->bs_num_rel[1] + 1;
-
- for(k = 0; k < sbrGridInfo->bs_num_rel[0]; k++)
- sbrGridInfo->bs_rel_board_0[k] = (uint8) BsGetBits(bs, 2);
-
- for(k = 0; k < sbrGridInfo->bs_num_rel[1]; k++)
- sbrGridInfo->bs_rel_board_1[k] = (uint8) BsGetBits(bs, 2);
-
- pointer_bits = (int16) (FloatFR_logDualis(nEnv + 1) + 0.992188f);
- sbrGridInfo->bs_pointer = (int16) BsGetBits(bs, pointer_bits);
-
- frameInfo->freqRes = (uint8) BsGetBits(bs, nEnv);
- break;
- }
-
- frameInfo->nEnvelopes = (uint8) nEnv;
- frameInfo->nNoiseEnvelopes = (nEnv == 1) ? 1 : 2;
-
- return (1);
-}
-
-/*
- \brief Initializes SBR header data
-*/
-void
-initHeaderData(SbrHeaderData *headerData, FreqBandData *freqBandData,
- int32 sampleRate, int16 samplesPerFrame)
-{
- FreqBandData *hFreq = freqBandData;
-
- COPY_MEMORY(headerData, &sbr_defaultHeader, sizeof(SbrHeaderData));
-
- headerData->hFreqBandData = hFreq;
- headerData->codecFrameSize = samplesPerFrame;
- headerData->outSampleRate = SBR_UPSAMPLE_FAC * sampleRate;
- headerData->numberTimeSlots = samplesPerFrame >> (4 + headerData->timeStep);
-}
-
-/*
- \brief Reads header data from TBitStream
-
- \return Processing status - HEADER_RESET or HEADER_OK
-*/
-SBR_HEADER_STATUS
-sbrGetHeaderData(SbrHeaderData *h_sbr_header, TBitStream *bs)
-{
- SbrHeaderData lastHeader;
- uint8 headerExtra1, headerExtra2;
-
- COPY_MEMORY(&lastHeader, h_sbr_header, sizeof(SbrHeaderData));
-
- h_sbr_header->ampResolution = (uint8) BsGetBits(bs, 1);
- h_sbr_header->startFreq = (uint8) BsGetBits(bs, 4);
- h_sbr_header->stopFreq = (uint8) BsGetBits(bs, 4);
- h_sbr_header->xover_band = (uint8) BsGetBits(bs, 3);
-
- BsGetBits(bs, 2);
-
- headerExtra1 = (uint8) BsGetBits(bs, 1);
- headerExtra2 = (uint8) BsGetBits(bs, 1);
-
- if(headerExtra1)
- {
- h_sbr_header->freqScale = (uint8) BsGetBits(bs, 2);
- h_sbr_header->alterScale = (uint8) BsGetBits(bs, 1);
- h_sbr_header->noise_bands = (uint8) BsGetBits(bs, 2);
- }
- else
- {
- h_sbr_header->freqScale = SBR_FREQ_SCALE_DEF;
- h_sbr_header->alterScale = SBR_ALTER_SCALE_DEF;
- h_sbr_header->noise_bands = SBR_NOISE_BANDS_DEF;
- }
-
- if(headerExtra2)
- {
- h_sbr_header->limiterBands = (uint8) BsGetBits(bs, 2);
- h_sbr_header->limiterGains = (uint8) BsGetBits(bs, 2);
- h_sbr_header->interpolFreq = (uint8) BsGetBits(bs, 1);
- h_sbr_header->smoothingLength = (uint8) BsGetBits(bs, 1);
- }
- else
- {
- h_sbr_header->limiterBands = SBR_LIMITER_BANDS_DEF;
- h_sbr_header->limiterGains = SBR_LIMITER_GAINS_DEF;
- h_sbr_header->interpolFreq = SBR_INTERPOL_FREQ_DEF;
- h_sbr_header->smoothingLength = SBR_SMOOTHING_LENGTH_DEF;
- }
-
- if(h_sbr_header->syncState != SBR_ACTIVE ||
- lastHeader.startFreq != h_sbr_header->startFreq ||
- lastHeader.stopFreq != h_sbr_header->stopFreq ||
- lastHeader.xover_band != h_sbr_header->xover_band ||
- lastHeader.freqScale != h_sbr_header->freqScale ||
- lastHeader.alterScale != h_sbr_header->alterScale ||
- lastHeader.noise_bands != h_sbr_header->noise_bands)
- return (HEADER_RESET); /*-- New settings --*/
-
- return (HEADER_OK);
-}
-
-/*
- \brief Reads additional harmonics parameters
-
- \return Number of bits read
-*/
-static int16
-sbrGetSineData(SbrHeaderData *headerData, SbrFrameData *frameData, TBitStream *bs)
-{
- int16 bitsRead;
-
- bitsRead = 1;
- frameData->isSinesPresent = (uint8) BsGetBits(bs, 1);
-
- if(frameData->isSinesPresent)
- {
- int16 rSfb;
-
- bitsRead += headerData->hFreqBandData->nSfb[1];
-
- rSfb = (headerData->hFreqBandData->nSfb[1] > 32) ? 32 : headerData->hFreqBandData->nSfb[1];
-
- frameData->addHarmonics[0] = (uint8) BsGetBits(bs, rSfb);
-
- if(headerData->hFreqBandData->nSfb[1] > 32)
- {
- rSfb = headerData->hFreqBandData->nSfb[1] - 32;
- frameData->addHarmonics[1] = (uint8) BsGetBits(bs, rSfb);
- }
- }
-
- return (bitsRead);
-}
-
-/*
- \brief Reads extension data from the TBitStream
-*/
-static void
-sbrReadExtensionData(TBitStream *bs, SbrExtensionData *sbrExtData, uint8 isMono)
-{
- sbrExtData->writePsData = 0;
- sbrExtData->extensionDataPresent = (uint8) BsGetBits(bs, 1);
-
- if(sbrExtData->extensionDataPresent)
- {
- int16 i, nBitsLeft, cnt;
-
- cnt = (int16) BsGetBits(bs, 4);
- if(cnt == 15)
- cnt += (int16) BsGetBits(bs, 8);
-
- sbrExtData->byteCount = MIN(cnt, sbrExtData->extDataBufLen);
-
- nBitsLeft = cnt << 3;
-
- while(nBitsLeft > 7)
- {
- sbrExtData->extension_id = (uint8) BsGetBits(bs, 2);
-
- if(!(sbrExtData->extension_id == SBR_PARAMETRIC_STEREO_ID && isMono))
- sbrExtData->extension_id = 0;
- else
- sbrExtData->writePsData = 1;
-
- nBitsLeft -= 2;
-
- cnt = (int16) ((uint16) nBitsLeft >> 3);
-
- if(sbrExtData->extDataBufLen)
- {
- for(i = 0; i < MIN(cnt, sbrExtData->extDataBufLen); i++)
- sbrExtData->extensioData[i] = (uint8) BsGetBits(bs, 8);
-
- for( ; i < cnt; i++)
- BsGetBits(bs, 8);
- }
- else
- for(i = 0; i < cnt; i++)
- BsGetBits(bs, 8);
-
- nBitsLeft -= cnt << 3;
- }
-
- BsGetBits(bs, nBitsLeft);
- }
-}
-
-/*
- \brief Reads TBitStream elements of one channel
-
- \return One on success
-*/
-int16
-sbrGetSCE(SbrHeaderData *headerData, SbrFrameData *frameData,
- SbrExtensionData *sbrExtData, TBitStream *bs,
- int16 decVal, uint8 isMono)
-{
- frameData->coupling = COUPLING_OFF;
-
- /*-- Data present. --*/
- frameData->dataPresent = (int16) BsGetBits(bs, 1);
- if(frameData->dataPresent) BsGetBits(bs, 4);
-
- /*-- Read grid info. --*/
- sbrReadGridInfo(bs, headerData, frameData);
-
- /*-- Read direction info for envelope decoding. --*/
- sbrGetDTDFData(frameData, bs);
-
- /*-- Read inverse filtering modes. --*/
- frameData->sbr_invf_mode = (uint8) BsGetBits(bs, headerData->hFreqBandData->nInvfBands << 1);
-
- /*-- Read Huffman coded envelope values. --*/
- sbrGetEnvelope(headerData, frameData, bs, decVal);
-
- /*-- Read noise data. --*/
- sbrGetNoiseFloorData(headerData, frameData, bs);
-
- /*-- Read sine data, if any. --*/
- sbrGetSineData(headerData, frameData, bs);
-
- /*-- Read extension data, if any. --*/
- sbrReadExtensionData(bs, sbrExtData, isMono);
-
- return (1);
-}
-
-/*
- \brief Reads TBitStream elements of a channel pair
-
- \return One on success
-*/
-int16
-sbrGetCPE(SbrHeaderData *headerData, SbrFrameData *frameDataLeft,
- SbrFrameData *frameDataRight, SbrExtensionData *sbrExtData,
- TBitStream *bs, int16 decVal)
-{
- /*-- Data present. -*/
- frameDataLeft->dataPresent = (uint8) BsGetBits(bs, 1);
- if(frameDataLeft->dataPresent)
- BsGetBits(bs, 8);
-
- /*-- Coupling mode. --*/
- if(BsGetBits(bs, 1))
- {
- frameDataLeft->coupling = COUPLING_LEVEL;
- frameDataRight->coupling = COUPLING_BAL;
- }
- else
- {
- frameDataLeft->coupling = COUPLING_OFF;
- frameDataRight->coupling = COUPLING_OFF;
- }
-
- /*-- Read grid info (left channel). --*/
- sbrReadGridInfo(bs, headerData, frameDataLeft);
-
- /*-- Read grid info (right channel). --*/
- if(frameDataLeft->coupling)
- COPY_MEMORY(&frameDataRight->frameInfo, &frameDataLeft->frameInfo, sizeof(FRAME_INFO));
- else
- sbrReadGridInfo(bs, headerData, frameDataRight);
-
- /*-- Read direction info for envelope decoding. --*/
- sbrGetDTDFData(frameDataLeft, bs);
- sbrGetDTDFData(frameDataRight, bs);
-
- /*-- Read inverse filtering modes for left channel. --*/
- frameDataLeft->sbr_invf_mode = (uint8) BsGetBits(bs, headerData->hFreqBandData->nInvfBands << 1);
-
- if(frameDataLeft->coupling)
- {
- frameDataRight->sbr_invf_mode = frameDataLeft->sbr_invf_mode;
-
- /*-- Read Huffman coded envelope + noise values for left channel. --*/
- sbrGetEnvelope(headerData, frameDataLeft, bs, decVal);
- sbrGetNoiseFloorData(headerData, frameDataLeft, bs);
-
- /*-- Read Huffman coded envelope for right channel. --*/
- sbrGetEnvelope(headerData, frameDataRight, bs, decVal);
- }
- else
- {
- /*-- Read inverse filtering modes for right channel. --*/
- frameDataRight->sbr_invf_mode = (uint8) BsGetBits(bs, headerData->hFreqBandData->nInvfBands << 1);
-
- /*-- Read Huffman coded envelope values. --*/
- sbrGetEnvelope(headerData, frameDataLeft, bs, decVal);
- sbrGetEnvelope(headerData, frameDataRight, bs, decVal);
-
- /*-- Read noise data for left channel. --*/
- sbrGetNoiseFloorData(headerData, frameDataLeft, bs);
- }
-
- /*-- Read noise data for right channel. --*/
- sbrGetNoiseFloorData(headerData, frameDataRight, bs);
-
- /*-- Read additional sines, if any. --*/
- sbrGetSineData(headerData, frameDataLeft, bs);
- sbrGetSineData(headerData, frameDataRight, bs);
-
- /*-- Read extension data, if any. --*/
- sbrReadExtensionData(bs, sbrExtData, 0);
-
- return (1);
-}