--- a/videoeditorengine/mp3aacManipLib/AACGain/src/huffdec1.cpp Fri Jan 29 14:08:33 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,454 +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:
-*
-*/
-
-
-/**************************************************************************
- huffdec1.cpp - Bit parsing routines for decoding LFE, SCE and CPE audio elements.
-
- Author(s): Juha Ojanpera
- Copyright (c) 2000-2004 by Nokia Research Center, Speech and Audio Systems.
- *************************************************************************/
-
-/*-- Project Headers. --*/
-#include "tool.h"
-#include "tool2.h"
-
-#define SCE_START_BITS (LEN_TAG + LEN_SCL_PCM)
-#define CPE_START_BITS (LEN_TAG + LEN_COM_WIN)
-
-/**************************************************************************
- Title: getmask
-
- Purpose: Reads MS mask and MS flag bits from the bitstream.
-
- Usage: y = getmask(bs, info, group, max_sfb, mask)
-
- Input: bs - bitstream parameters
- info - block (long/short) parameters
- group - grouping info for short blocks
- max_sfb - # of sfb's present in the channel pair
-
- Output: y - value of MS mask in the bitstream
- mask - flag bit for each sfb (only if y == 1)
-
- Author(s): Juha Ojanpera
- *************************************************************************/
-
-INLINE int16
-getmask(TBitStream *bs, CInfo *info, uint8 *group, uint8 max_sfb, uint8 *mask)
-{
- int16 b, i, mp;
-
- mp = (int16) BsGetBits(bs, LEN_MASK_PRES);
-
- /*--Get mask. --*/
- if(mp == 1)
- {
- for(b = 0; b < info->nsbk; b = *group++)
- {
- int16 sfb;
- uint32 tmp, flag;
-
-#if 1
- /*
- * Speed up the reading of the flags.
- */
- sfb = max_sfb;
- if(sfb > 32) sfb = 32;
- flag = 1 << (sfb - 1);
- tmp = BsGetBits(bs, sfb);
-
- for(i = 0; i < sfb; i++, mask++, flag >>= 1)
- *mask = (tmp & flag) ? (uint8) 1 : (uint8) 0;
-
- if(sfb == 32)
- {
- sfb = int16(max_sfb - 32);
- flag = 1 << (sfb - 1);
- tmp = BsGetBits(bs, sfb);
-
- for( ; i < max_sfb; i++, mask++, flag >>= 1)
- *mask = (tmp & flag) ? (uint8) 1 : (uint8) 0;
- }
-
-#else
- for(i = 0; i < max_sfb; i++, mask++)
- *mask = (uint8) BsGetBits(bs, LEN_MASK);
- mask += info->sfb_per_sbk[0] - i;
-#endif
- }
- }
- else if(mp == 2)
- {
- for(b = 0; b < info->nsbk; b = *group++)
- {
- SET_MEMORY(mask, max_sfb, 1);
- mask += info->sfb_per_sbk[0];
- }
- }
- else
- {
- for(b = 0; b < info->nsbk; b = *group++)
- {
- ZERO_MEMORY(mask, max_sfb);
- mask += info->sfb_per_sbk[0];
- }
- }
-
- return (mp);
-}
-
-/**************************************************************************
- Object Definitions
- *************************************************************************/
-
-/**************************************************************************
- Title: GetSCE
-
- Purpose: Decodes LFE/SCE audio element from the bitstream.
-
- Usage: y = GetSCE(aac, bs, mip, gains, gainPos, bufBitOffset)
-
- Input: bs - bitstream parameters
- bufBitOffset - # of bits read read so far
-
- Output: y - 0 on success, -1 otherwise
- mip
- ch_info - channel mapping parameters
- aac
- winInfo - block/window parameters for each channel
- toolInfo
- quant - quantized spectral coefficients
- gains - 'global_gain' bitstream element
- gainPos - location of 'global_gain' within the bitstream
-
- Author(s): Juha Ojanpera
- *************************************************************************/
-
-int16
-GetSCE(CAACAudDec *aac, TBitStream *bs, CMC_Info *mip, uint8 *gains,
- uint32 *gainPos, uint32 bufBitOffset)
-{
- int16 ch, global_gain;
- CWindowInfo **winInfo;
- CToolInfo **toolInfo;
- CWindowInfo *win;
- CToolInfo *tool;
- TCh_Info *cip;
- uint32 tmp;
-
- toolInfo = aac->tool;
- winInfo = aac->winInfo;
-
- tmp = BsGetBits(bs, SCE_START_BITS);
-
- ch = ChIndex(1, (int16) (tmp >> LEN_SCL_PCM), 0, mip);
- cip = &mip->ch_info[ch];
- tool = toolInfo[ch];
- win = winInfo[ch];
-
- /*-- Global gain. --*/
- global_gain = (int16) (tmp & 0xFF);
-
- /*-- Save global gain element and its position. --*/
- if(gainPos)
- {
- gains[0] = (uint8) global_gain;
- gainPos[0] = BsGetBitsRead(bs) - bufBitOffset - LEN_SCL_PCM;
- }
-
- if(!GetICSInfo(bs, win, tool->ltp, NULL)) return (-1);
-
- cip->info = mip->sfbInfo->winmap[win->wnd];
-
- win->hasmask = 0;
- tool = toolInfo[ch];
-
- if(!GetICS(bs, cip, win->group, win->max_sfb, win->cb_map,
- tool->quant, global_gain, win->sfac))
- return (-1);
-
- return (0);
-}
-
-/**************************************************************************
- Title: GetCPE
-
- Purpose: Decodes CPE audio element from the bitstream.
-
- Usage: y = GetCPE(aac, bs, mip, gains, gainPos, bufBitOffset
-
- Input: bs - bitstream parameters
- bufBitOffset - # of bits read read so far
-
- Output: y - 0 on success, -1 otherwise
- mip
- ch_info - channel mapping parameters
- aac
- winInfo - block/window parameters for each channel
- toolInfo
- quant - quantized spectral coefficients
- gains - 'global_gain' bitstream element
- gainPos - location of 'global_gain' within the bitstream
-
- Author(s): Juha Ojanpera
- *************************************************************************/
-
-int16
-GetCPE(CAACAudDec *aac, TBitStream *bs, CMC_Info *mip, uint8 *gains,
- uint32 *gainPos, uint32 bufBitOffset)
-{
- int16 i, common_window, ch;
- CWindowInfo **winInfo;
- CToolInfo **toolInfo;
- int16 global_gain;
- CWindowInfo *win;
- CToolInfo **tool;
- TCh_Info *cip;
-
- toolInfo = aac->tool;
- winInfo = aac->winInfo;
-
- uint16 tmp = (uint16) BsGetBits(bs, CPE_START_BITS);
-
- common_window = (int16) (tmp & 0x1);
-
- ch = ChIndex(2, (int16) (tmp >> 1), common_window, mip);
-
- if(common_window)
- {
- win = winInfo[ch];
-
- if(!GetICSInfo(bs, win, toolInfo[ch]->ltp, toolInfo[ch + 1]->ltp))
- return (-1);
-
- win->hasmask = (uint8) getmask(bs, mip->sfbInfo->winmap[win->wnd], win->group, win->max_sfb, win->mask);
- }
- else
- winInfo[ch]->hasmask = winInfo[ch + 1]->hasmask = 0;
-
- tool = toolInfo + ch;
- cip = &mip->ch_info[ch];
- for(i = ch; i < ch + 2; i++, cip++, tool++)
- {
- CWindowInfo *wi = winInfo[i];
-
- win = winInfo[cip->widx];
-
- /*-- Global gain. --*/
- global_gain = (int16) BsGetBits(bs, LEN_SCL_PCM);
-
- /*-- Save global gain element and its position. --*/
- if(gainPos)
- {
- gains[i - ch] = (uint8) global_gain;
- gainPos[i - ch] = BsGetBitsRead(bs) - bufBitOffset - LEN_SCL_PCM;
- bufBitOffset = BsGetBitsRead(bs);
- }
-
- if(!common_window)
- if(!GetICSInfo(bs, win, (*tool)->ltp, NULL))
- return (-1);
-
- cip->info = mip->sfbInfo->winmap[win->wnd];
-
- if(!GetICS(bs, cip, win->group, win->max_sfb, wi->cb_map,
- (*tool)->quant, global_gain, wi->sfac))
- return (-1);
- }
-
- return (0);
-}
-
-/**************************************************************************
- Title : LTP_Decode
-
- Purpose : Decodes the bitstream elements for LTP tool.
-
- Usage : LTP_Decode(bs, ltp_info, max_sfb)
-
- Input : bs - input bitstream
- max_sfb - # scalefactor bands to be used for current frame
-
- Output : ltp_info - LTP parameters for this channel
-
- Author(s) : Juha Ojanpera
- *************************************************************************/
-
-INLINE void
-LTP_Decode(TBitStream *bs, CLTP_Info *ltp_info, int16 max_sfb)
-{
- /*
- Purpose: 1 bits is used to indicate the presence of LTP. */
-#define LEN_LTP_DATA_PRESENT 1
-
-/*
- Purpose: # of bits used for the pitch lag. */
-#define LEN_LTP_LAG 11
-
-/*
- Purpose: # of bits used for the gain value. */
-#define LEN_LTP_COEF 3
-
- ltp_info->ltp_present = (uint8) BsGetBits(bs, LEN_LTP_DATA_PRESENT);
- if(ltp_info->ltp_present)
- {
- uint32 bits = BsGetBits(bs, LEN_LTP_LAG + LEN_LTP_COEF);
-
- /*-- LTP lag. --*/
- ltp_info->delay[0] = (int16) (bits >> LEN_LTP_COEF);
-
- /*-- LTP gain. --*/
- ltp_info->cbIdx = (uint8) (bits & 0x7);
-
- /*-- Sfb flags. --*/
- ltp_info->max_sfb = max_sfb;
- if(max_sfb < 33)
- ltp_info->sfbflags[0] = BsGetBits(bs, max_sfb);
- else
- {
- ltp_info->sfbflags[0] = BsGetBits(bs, 32);
- ltp_info->sfbflags[1] = BsGetBits(bs, (int16) (max_sfb - 32));
- }
- }
-}
-
-/**************************************************************************
- Title: GetICSInfo
-
- Purpose: Reads side information for individual channel element.
- Individual channel elements within channel pair element may
- share this information.
-
- Usage: y = GetICSInfo(bs, winInfo, ltp_left, ltp_right)
-
- Input: bs - bitstream parameters
-
- Output: y - # of sfb's present in this channel
- winInfo :
- wnd - window type for this channel
- wshape - window shape for this channel
- group - grouping of short blocks
- lpflag - BWAP prediction flags for each sfb
- prstflag - reset flags for BWAP
- ltp_left - LTP parameters for left channel of the audio element
- ltp_right - LTP parameters for right channel of the audio element
-
- Author(s): Juha Ojanpera
- *************************************************************************/
-
-int16
-GetICSInfo(TBitStream *bs, CWindowInfo *winInfo, CLTP_Info *ltp_left, CLTP_Info *ltp_right)
-{
-#define INFO_BITS (LEN_ICS_RESERV + LEN_WIN_SEQ + LEN_WIN_SH + LEN_MAX_SFBL + LEN_PRED_PRES)
- int16 i, j;
- uint32 tmp;
-
- tmp = BsGetBits(bs, INFO_BITS);
- winInfo->wnd = (uint8) ((tmp >> 8) & 0x3);
- winInfo->wshape[0].this_bk = (uint8) ((tmp >> 7) & 0x1);
-
- /*-- Max scalefactor, scalefactor grouping and prediction flags. --*/
- winInfo->prstflag[0] = 0;
- if(winInfo->wnd == 2)
- {
- tmp <<= 4;
- tmp |= BsGetBits(bs, 4);
- winInfo->max_sfb = (uint8) ((tmp >> 7) & 0xF);
- if(winInfo->max_sfb > MAXLONGSFBBANDS) return (FALSE);
-
- /*-- Get grouping info for short blocks. --*/
- j = 0;
- if(!(tmp & 64)) winInfo->group[j++] = 1;
- if(!(tmp & 32)) winInfo->group[j++] = 2;
- if(!(tmp & 16)) winInfo->group[j++] = 3;
- if(!(tmp & 8)) winInfo->group[j++] = 4;
- if(!(tmp & 4)) winInfo->group[j++] = 5;
- if(!(tmp & 2)) winInfo->group[j++] = 6;
- if(!(tmp & 1)) winInfo->group[j++] = 7;
- winInfo->group[j] = NSHORT;
-
- /*-- Prediction (BWAP) is disabled. --*/
- winInfo->lpflag[0] = 0;
- }
- else
- {
- winInfo->group[0] = 1;
- winInfo->max_sfb = (uint8) ((tmp >> 1) & 0x3F);
- if(winInfo->max_sfb > MAXLONGSFBBANDS) return (FALSE);
-
- if(winInfo->predType == BWAP_PRED)
- {
- /*-- Read BWAP predictor parameters. --*/
- winInfo->lpflag[0] = (uint8) (tmp & 0x1);
- if(winInfo->lpflag[0])
- {
- /*-- Predictor reset pattern. --*/
- winInfo->prstflag[0] = (uint8) BsGetBits(bs, LEN_PRED_RST);
- if(winInfo->prstflag[0])
- winInfo->prstflag[1] = (uint8) BsGetBits(bs, LEN_PRED_RSTGRP);
-
- /*-- Sfb flags for each predictor band. --*/
- j = (winInfo->max_sfb < winInfo->predBands) ? winInfo->max_sfb : winInfo->predBands;
-
- for(i = 1; i < j + 1; i++)
- winInfo->lpflag[i] = (uint8) BsGetBits(bs, LEN_PRED_ENAB);
-
- for(; i < winInfo->predBands + 1; i++)
- winInfo->lpflag[i] = 0;
- }
- }
-
- else if(winInfo->predType == LTP_PRED)
- {
- /*-- Is LTP used in this channel ? --*/
- ltp_left->ltp_present = (uint8) (tmp & 1);
- if(ltp_left->ltp_present)
- {
- int16 nbands = MIN(winInfo->max_sfb, winInfo->predBands);
- LTP_Decode(bs, ltp_left, nbands);
- if(ltp_right)
- LTP_Decode(bs, ltp_right, nbands);
- }
- else if(ltp_right) ltp_right->ltp_present = 0;
- }
-
- /*-- Bitstream syntax error. --*/
- else if(tmp & 0x1) return (FALSE);
- }
-
- return (TRUE);
-}
-
-/*
- * Retrieves 'global_gain' bitstream elements from single channel element.
- */
-int16
-GetSCEGain(CAACAudDec *aac, TBitStream *bs, uint8 *gains, uint32 *gainPos, uint32 bufBitOffset)
-{
- return GetSCE(aac, bs, aac->mc_info, gains, gainPos, bufBitOffset);
-}
-
-/*
- * Retrieves 'global_gain' bitstream elements from channel pair element.
- */
-int16
-GetCPEGain(CAACAudDec *aac, TBitStream *bs, uint8 *gains, uint32 *gainPos, uint32 bufBitOffset)
-{
- return GetCPE(aac, bs, aac->mc_info, gains, gainPos, bufBitOffset);
-}