ref: 8b6936294846c08a320e4dc9a95d2810068e1a33
dir: /libfaac/bitstream.h/
/*
* FAAC - Freeware Advanced Audio Coder
* Copyright (C) 2001 Menno Bakker
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: bitstream.h,v 1.10 2001/06/08 18:01:09 menno Exp $
*/
#ifndef BITSTREAM_H
#define BITSTREAM_H
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include "frame.h"
#include "coder.h"
#include "channels.h"
/*
* Raw bitstream constants
*/
#define LEN_SE_ID 3
#define LEN_TAG 4
#define LEN_GLOB_GAIN 8
#define LEN_COM_WIN 1
#define LEN_ICS_RESERV 1
#define LEN_WIN_SEQ 2
#define LEN_WIN_SH 1
#define LEN_MAX_SFBL 6
#define LEN_MAX_SFBS 4
#define LEN_CB 4
#define LEN_SCL_PCM 8
#define LEN_PRED_PRES 1
#define LEN_PRED_RST 1
#define LEN_PRED_RSTGRP 5
#define LEN_PRED_ENAB 1
#define LEN_MASK_PRES 2
#define LEN_MASK 1
#define LEN_PULSE_PRES 1
#define LEN_TNS_PRES 1
#define LEN_TNS_NFILTL 2
#define LEN_TNS_NFILTS 1
#define LEN_TNS_COEFF_RES 1
#define LEN_TNS_LENGTHL 6
#define LEN_TNS_LENGTHS 4
#define LEN_TNS_ORDERL 5
#define LEN_TNS_ORDERS 3
#define LEN_TNS_DIRECTION 1
#define LEN_TNS_COMPRESS 1
#define LEN_GAIN_PRES 1
#define LEN_NEC_NPULSE 2
#define LEN_NEC_ST_SFB 6
#define LEN_NEC_POFF 5
#define LEN_NEC_PAMP 4
#define NUM_NEC_LINES 4
#define NEC_OFFSET_AMP 4
#define LEN_NCC 3
#define LEN_IS_CPE 1
#define LEN_CC_LR 1
#define LEN_CC_DOM 1
#define LEN_CC_SGN 1
#define LEN_CCH_GES 2
#define LEN_CCH_CGP 1
#define LEN_D_CNT 4
#define LEN_D_ESC 12
#define LEN_F_CNT 4
#define LEN_F_ESC 8
#define LEN_BYTE 8
#define LEN_PAD_DATA 8
#define LEN_PC_COMM 8
#define ID_SCE 0
#define ID_CPE 1
#define ID_CCE 2
#define ID_LFE 3
#define ID_DSE 4
#define ID_PCE 5
#define ID_FIL 6
#define ID_END 7
/* MPEG ID's */
#define MPEG2 1
#define MPEG4 0
/* AAC object types */
#define MAIN 0
#define LOW 1
#define SSR 2
#define LTP 3
#define BYTE_NUMBIT 8 /* bits in byte (char) */
#define LONG_NUMBIT 32 /* bits in unsigned long */
#define bit2byte(a) (((a)+BYTE_NUMBIT-1)/BYTE_NUMBIT)
typedef struct
{
unsigned char *data; /* data bits */
long numBit; /* number of bits in buffer */
long size; /* buffer size in bytes */
long currentBit; /* current bit position in bit stream */
long numByte; /* number of bytes read/written (only file) */
} BitStream;
int WriteBitstream(faacEncHandle hEncoder,
CoderInfo *coderInfo,
ChannelInfo *channelInfo,
BitStream *bitStream,
int numChannels);
static int CountBitstream(faacEncHandle hEncoder,
CoderInfo *coderInfo,
ChannelInfo *channelInfo,
BitStream *bitStream,
int numChannels);
static int WriteADTSHeader(faacEncHandle hEncoder,
BitStream *bitStream,
int writeFlag);
static int WriteCPE(CoderInfo *coderInfoL,
CoderInfo *coderInfoR,
ChannelInfo *channelInfo,
BitStream* bitStream,
int objectType,
int writeFlag);
static int WriteSCE(CoderInfo *coderInfo,
ChannelInfo *channelInfo,
BitStream *bitStream,
int objectType,
int writeFlag);
static int WriteLFE(CoderInfo *coderInfo,
ChannelInfo *channelInfo,
BitStream *bitStream,
int objectType,
int writeFlag);
static int WriteICSInfo(CoderInfo *coderInfo,
BitStream *bitStream,
int objectType,
int writeFlag);
static int WriteICS(CoderInfo *coderInfo,
BitStream *bitStream,
int commonWindow,
int objectType,
int writeFlag);
static int WriteLTPPredictorData(CoderInfo *coderInfo,
BitStream *bitStream,
int writeFlag);
static int WritePredictorData(CoderInfo *coderInfo,
BitStream *bitStream,
int writeFlag);
static int WritePulseData(CoderInfo *coderInfo,
BitStream *bitStream,
int writeFlag);
static int WriteTNSData(CoderInfo *coderInfo,
BitStream *bitStream,
int writeFlag);
static int WriteGainControlData(CoderInfo *coderInfo,
BitStream *bitStream,
int writeFlag);
static int WriteSpectralData(CoderInfo *coderInfo,
BitStream *bitStream,
int writeFlag);
static int WriteAACFillBits(BitStream* bitStream,
int numBits,
int writeFlag);
static int FindGroupingBits(CoderInfo *coderInfo);
BitStream *OpenBitStream(int size, unsigned char *buffer);
int CloseBitStream(BitStream *bitStream);
static long BufferNumBit(BitStream *bitStream);
static int WriteByte(BitStream *bitStream,
unsigned long data,
int numBit);
int PutBit(BitStream *bitStream,
unsigned long data,
int numBit);
static int ByteAlign(BitStream* bitStream,
int writeFlag);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* BITSTREAM_H */