--- a/videoeditorengine/mp3aacManipLib/AACGain/src/huffdec2.cpp Fri Jan 29 14:08:33 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,320 +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:
-*
-*/
-
-
-/**************************************************************************
- huffdec2.cpp - Bit parsing routines for decoding individual channel elements.
-
- Author(s): Juha Ojanpera
- Copyright (c) 2000-2004 by Nokia Research Center, Speech and Audio Systems.
- *************************************************************************/
-
-/*-- Project Headers. --*/
-#include "tool2.h"
-
-/**************************************************************************
- Title: calc_gsfb_table
-
- Purpose: Calculates reordering parameters for short blocks.
-
- Usage: calc_gsfb_table(info, group)
-
- Input: info - block (long/short) parameters
- group - grouping info for short blocks
-
- Author(s): Juha Ojanpera
- *************************************************************************/
-
-INLINE void
-calc_gsfb_table(CInfo *info, uint8 *group)
-{
- int16 group_offset, group_idx, offset;
- int16 sfb, len, *group_offset_p;
-
- /*-- First calc the group length. --*/
- group_offset = 0;
- group_idx = 0;
- do
- {
- info->group_len[group_idx] = (int16) (group[group_idx] - group_offset);
- group_offset = group[group_idx];
- group_idx++;
- }
- while(group_offset < NSHORT);
-
- info->num_groups = group_idx;
- group_offset_p = info->bk_sfb_top;
- offset = 0;
- for(group_idx = 0; group_idx < info->num_groups; group_idx++)
- {
- len = info->group_len[group_idx];
- for(sfb = 0; sfb < info->sfb_per_sbk[group_idx]; sfb++)
- {
- offset += info->sfb_width_128[sfb] * len;
- *group_offset_p++ = offset;
- }
- }
-}
-
-/**************************************************************************
- Title: get_pulse_nc
-
- Purpose: Reads pulse data from the bitstream.
-
- Usage: get_pulse_nc(bs, pulse_info)
-
- Input: bs - bitstream parameters
-
- Output: pulse_info - pulse data parameters for this channel
-
- Author(s): Juha Ojanpera
- *************************************************************************/
-
-INLINE void
-get_pulse_nc(TBitStream *bs, PulseInfo *pulse_info)
-{
- int16 i, mask;
-
- mask = (1 << LEN_PULSE_PAMP) - 1;
- pulse_info->number_pulse = (int16) BsGetBits(bs, LEN_PULSE_NPULSE);
- pulse_info->pulse_start_sfb = (int16) BsGetBits(bs, LEN_PULSE_ST_SFB);
-
- for(i = 0; i < pulse_info->number_pulse + 1; i++)
- {
- uint32 codeword;
-
- codeword = BsGetBits(bs, LEN_PULSE_POFF + LEN_PULSE_PAMP);
-
- pulse_info->pulse_offset[i] = (int16) (codeword >> LEN_PULSE_PAMP);
- pulse_info->pulse_amp[i] = (int16) (codeword & mask);
- }
-}
-
-/**************************************************************************
- Title: huf_cb
-
- Purpose: Reads the Huffman codebook number and boundaries for each section.
-
- Usage: y = huf_cb(bs, sect, info, tot_sfb, max_sfb, cb_map)
-
- Input: bs - bitstream parameters
- info - block (long/short) parameters
- tot_sfb - total # of sfb's present
- max_sfb - max # of sfb's per block present
-
- Output: y - # of sections
- sect - sectioning info (cb, cb_length; cb, cb_length; ...)
- cb_map - Huffman codebook number for each sfb
-
- Author(s): Juha Ojanpera
- *************************************************************************/
-
-INLINE int16
-huf_cb(TBitStream *bs, uint8 *sect, CInfo *info, int16 tot_sfb, uint8 max_sfb, uint8 *cb_map)
-{
- int16 nsect, n, base, bits, len, cb, diff, cb_len, bot;
-
- bits = (info->islong) ? (int16) LONG_SECT_BITS : (int16) SHORT_SECT_BITS;
-
- nsect = 0;
- len = (int16) ((1 << bits) - 1);
- diff = info->sfb_per_sbk[0] - max_sfb;
-
- for(bot = base = 0; base < tot_sfb && nsect < tot_sfb; )
- {
- *sect++ = uint8(cb = BsGetBits(bs, LEN_CB));
-
- n = BsGetBits(bs, bits);
- while(n == len && base < tot_sfb)
- {
- base += len;
- n = BsGetBits(bs, bits);
- }
- base += n;
- *sect++ = uint8(base);
- nsect++;
-
- cb_len = base - bot; SET_MEMORY(cb_map, cb_len, cb); cb_map += cb_len;
-
- if(base == max_sfb)
- {
- base += diff;
- if(info->islong) break;
-
- if(diff)
- {
- *sect++ = 0; *sect++ = uint8(base);
- ZERO_MEMORY(cb_map, diff); cb_map += diff;
- nsect++;
- }
- max_sfb += info->sfb_per_sbk[0];
- }
- bot = base;
- }
-
- if(base != tot_sfb || nsect > tot_sfb)
- nsect = -1;
-
- return (nsect);
-}
-
-/**************************************************************************
- Title: TNS_Decode
-
- Purpose: Reads TNS bitstream elements.
-
- Usage: TNS_Decode(bs, info)
-
- Input: bs - bitstream parameters
- info - block (long/short) parameters
-
- Author(s): Juha Ojanpera
- *************************************************************************/
-
-INLINE void
-TNS_Decode(TBitStream *bs, CInfo *info)
-{
- int16 f, s, res, res2, nBlockBits, nOrderBits, nOrderBitsMask;
-
- nBlockBits = (!info->islong) ? (int16) 4 : (int16) 6;
- nOrderBits = (!info->islong) ? (int16) 3 : (int16) 5;
- nOrderBitsMask = (int16) ((1 << nOrderBits) - 1);
-
- for(s = 0; s < info->nsbk; s++)
- {
- int16 nTnsFilt;
-
- nTnsFilt = (int16) BsGetBits(bs, (!info->islong) ? (int16) 1 : (int16) 2);
- if(!nTnsFilt)
- continue;
-
- res = (int16) (BsGetBits(bs, 1) + 3);
- for(f = nTnsFilt; f > 0; f--)
- {
- int16 t, order;
-
- t = (int16) BsGetBits(bs, (int16) (nBlockBits + nOrderBits));
- order = (int16) (t & nOrderBitsMask);
-
- if(order)
- {
- t = (int16) BsGetBits(bs, 2);
- res2 = (int16) (res - (t & 0x1));
-
- BsSkipNBits(bs, res2 * order);
- }
- }
- }
-}
-
-/**************************************************************************
- Title: GetICS
-
- Purpose: Decodes individual channel elements.
-
- Usage: y = GetICS(bs, cip, group, max_sfb, cb_map, coef, gain, factors)
-
- Input: bs - bitstream parameters
- cip :
- info - block (long/short) parameters
- group - grouping info for short blocks
- max_sfb - max # of sfb's present
- gain - start value for scalefactor decoding
-
- Output: y - TRUE on success, FALSE otherwise
- cb_map - Huffman codebook number for each sfb
- factors - scalefactors for this channel
- cip :
- is_present - TRUE if IS is used, FALSE otherwise
- tns_present - TRUE if TNS is used, FALSE otherwise
-
- Author(s): Juha Ojanpera
-*************************************************************************/
-
-int16
-GetICS(TBitStream *bs, TCh_Info *cip, uint8 *group, uint8 max_sfb, uint8 *cb_map,
- int16 *quant, int16 gain, int16 *factors)
-{
- CInfo *info;
- int16 nsect;
- PulseInfo pulse_info;
- uint8 sect[(MAXBANDS + 1) << 1];
-
- info = cip->info;
-
- /*-- Calculate total number of sfb for this grouping. --*/
- if(max_sfb == 0)
- {
- nsect = 0;
- ZERO_MEMORY(cb_map, MAXBANDS);
- ZERO_MEMORY(factors, MAXBANDS * sizeof(int16));
- }
- else
- {
- int16 tot_sfb = info->sfb_per_sbk[0];
- if(!info->islong)
- {
- int16 i = 0;
- while(group[i++] < info->nsbk)
- tot_sfb += info->sfb_per_sbk[0];
-
- /*-- Calculate band offsets. --*/
- calc_gsfb_table(info, group);
- }
-
- /*-- Section data. --*/
- nsect = huf_cb(bs, sect, info, tot_sfb, max_sfb, cb_map);
- if(nsect < 0) return (FALSE);
-
- /*-- Scalefactor data. --*/
- if(!huf_sfac(bs, cip, group, cb_map, gain, factors, max_sfb))
- return (FALSE);
- }
-
- cip->tns_present = FALSE;
- pulse_info.pulse_data_present = FALSE;
-
- /*-- PULSE noiseless coding. --*/
- pulse_info.pulse_data_present = (BOOL) BsGetBits(bs, 1);
- if(pulse_info.pulse_data_present)
- {
- if(info->islong)
- get_pulse_nc(bs, &pulse_info);
- else
- return (FALSE);
- }
-
- /*-- TNS data. --*/
- if(BsGetBits(bs, 1))
- {
- cip->tns_present = TRUE;
- TNS_Decode(bs, info);
- }
-
- /*-- Gain control. --*/
- if(BsGetBits(bs, 1))
- return (FALSE);
-
- /*-- Quantized spectral data. --*/
- if(!(!nsect && max_sfb))
- cip->num_bins = huf_spec(bs, info, nsect, sect, quant, cip->huf, 1);
- else
- return (FALSE);
-
- return (TRUE);
-}