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webrtc / src / webrtc / 050dfd1da90c2cbd84590b458113565055f453cf / . / modules / audio_coding / codecs / ilbc / pack_bits.c
blob: 9475ecba01ab1dddb4f2d7e943ec9775a6c6af31 [file] [log] [blame]
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_PackBits.c
******************************************************************/
#include "defines.h"
/*----------------------------------------------------------------*
* unpacking of bits from bitstream, i.e., vector of bytes
*---------------------------------------------------------------*/
void WebRtcIlbcfix_PackBits(
uint16_t *bitstream, /* (o) The packetized bitstream */
iLBC_bits *enc_bits, /* (i) Encoded bits */
int16_t mode /* (i) Codec mode (20 or 30) */
){
uint16_t *bitstreamPtr;
int i, k;
int16_t *tmpPtr;
bitstreamPtr=bitstream;
/* Class 1 bits of ULP */
/* First int16_t */
(*bitstreamPtr) = ((uint16_t)enc_bits->lsf[0])<<10; /* Bit 0..5 */
(*bitstreamPtr) |= (enc_bits->lsf[1])<<3; /* Bit 6..12 */
(*bitstreamPtr) |= (enc_bits->lsf[2]&0x70)>>4; /* Bit 13..15 */
bitstreamPtr++;
/* Second int16_t */
(*bitstreamPtr) = ((uint16_t)enc_bits->lsf[2]&0xF)<<12; /* Bit 0..3 */
if (mode==20) {
(*bitstreamPtr) |= (enc_bits->startIdx)<<10; /* Bit 4..5 */
(*bitstreamPtr) |= (enc_bits->state_first)<<9; /* Bit 6 */
(*bitstreamPtr) |= (enc_bits->idxForMax)<<3; /* Bit 7..12 */
(*bitstreamPtr) |= ((enc_bits->cb_index[0])&0x70)>>4; /* Bit 13..15 */
bitstreamPtr++;
/* Third int16_t */
(*bitstreamPtr) = ((enc_bits->cb_index[0])&0xE)<<12; /* Bit 0..2 */
(*bitstreamPtr) |= ((enc_bits->gain_index[0])&0x18)<<8; /* Bit 3..4 */
(*bitstreamPtr) |= ((enc_bits->gain_index[1])&0x8)<<7; /* Bit 5 */
(*bitstreamPtr) |= ((enc_bits->cb_index[3])&0xFE)<<2; /* Bit 6..12 */
(*bitstreamPtr) |= ((enc_bits->gain_index[3])&0x10)>>2; /* Bit 13 */
(*bitstreamPtr) |= ((enc_bits->gain_index[4])&0x8)>>2; /* Bit 14 */
(*bitstreamPtr) |= ((enc_bits->gain_index[6])&0x10)>>4; /* Bit 15 */
} else { /* mode==30 */
(*bitstreamPtr) |= (enc_bits->lsf[3])<<6; /* Bit 4..9 */
(*bitstreamPtr) |= (enc_bits->lsf[4]&0x7E)>>1; /* Bit 10..15 */
bitstreamPtr++;
/* Third int16_t */
(*bitstreamPtr) = ((uint16_t)enc_bits->lsf[4]&0x1)<<15; /* Bit 0 */
(*bitstreamPtr) |= (enc_bits->lsf[5])<<8; /* Bit 1..7 */
(*bitstreamPtr) |= (enc_bits->startIdx)<<5; /* Bit 8..10 */
(*bitstreamPtr) |= (enc_bits->state_first)<<4; /* Bit 11 */
(*bitstreamPtr) |= ((enc_bits->idxForMax)&0x3C)>>2; /* Bit 12..15 */
bitstreamPtr++;
/* 4:th int16_t */
(*bitstreamPtr) = ((uint16_t)enc_bits->idxForMax&0x3)<<14; /* Bit 0..1 */
(*bitstreamPtr) |= (enc_bits->cb_index[0]&0x78)<<7; /* Bit 2..5 */
(*bitstreamPtr) |= (enc_bits->gain_index[0]&0x10)<<5; /* Bit 6 */
(*bitstreamPtr) |= (enc_bits->gain_index[1]&0x8)<<5; /* Bit 7 */
(*bitstreamPtr) |= (enc_bits->cb_index[3]&0xFC); /* Bit 8..13 */
(*bitstreamPtr) |= (enc_bits->gain_index[3]&0x10)>>3; /* Bit 14 */
(*bitstreamPtr) |= (enc_bits->gain_index[4]&0x8)>>3; /* Bit 15 */
}
/* Class 2 bits of ULP */
/* 4:th to 6:th int16_t for 20 ms case
5:th to 7:th int16_t for 30 ms case */
bitstreamPtr++;
tmpPtr=enc_bits->idxVec;
for (k=0; k<3; k++) {
(*bitstreamPtr) = 0;
for (i=15; i>=0; i--) {
(*bitstreamPtr) |= ((uint16_t)((*tmpPtr)&0x4)>>2)<<i;
/* Bit 15-i */
tmpPtr++;
}
bitstreamPtr++;
}
if (mode==20) {
/* 7:th int16_t */
(*bitstreamPtr) = 0;
for (i=15; i>6; i--) {
(*bitstreamPtr) |= ((uint16_t)((*tmpPtr)&0x4)>>2)<<i;
/* Bit 15-i */
tmpPtr++;
}
(*bitstreamPtr) |= (enc_bits->gain_index[1]&0x4)<<4; /* Bit 9 */
(*bitstreamPtr) |= (enc_bits->gain_index[3]&0xC)<<2; /* Bit 10..11 */
(*bitstreamPtr) |= (enc_bits->gain_index[4]&0x4)<<1; /* Bit 12 */
(*bitstreamPtr) |= (enc_bits->gain_index[6]&0x8)>>1; /* Bit 13 */
(*bitstreamPtr) |= (enc_bits->gain_index[7]&0xC)>>2; /* Bit 14..15 */
} else { /* mode==30 */
/* 8:th int16_t */
(*bitstreamPtr) = 0;
for (i=15; i>5; i--) {
(*bitstreamPtr) |= ((uint16_t)((*tmpPtr)&0x4)>>2)<<i;
/* Bit 15-i */
tmpPtr++;
}
(*bitstreamPtr) |= (enc_bits->cb_index[0]&0x6)<<3; /* Bit 10..11 */
(*bitstreamPtr) |= (enc_bits->gain_index[0]&0x8); /* Bit 12 */
(*bitstreamPtr) |= (enc_bits->gain_index[1]&0x4); /* Bit 13 */
(*bitstreamPtr) |= (enc_bits->cb_index[3]&0x2); /* Bit 14 */
(*bitstreamPtr) |= (enc_bits->cb_index[6]&0x80)>>7; /* Bit 15 */
bitstreamPtr++;
/* 9:th int16_t */
(*bitstreamPtr) = ((uint16_t)enc_bits->cb_index[6]&0x7E)<<9;/* Bit 0..5 */
(*bitstreamPtr) |= (enc_bits->cb_index[9]&0xFE)<<2; /* Bit 6..12 */
(*bitstreamPtr) |= (enc_bits->cb_index[12]&0xE0)>>5; /* Bit 13..15 */
bitstreamPtr++;
/* 10:th int16_t */
(*bitstreamPtr) = ((uint16_t)enc_bits->cb_index[12]&0x1E)<<11;/* Bit 0..3 */
(*bitstreamPtr) |= (enc_bits->gain_index[3]&0xC)<<8; /* Bit 4..5 */
(*bitstreamPtr) |= (enc_bits->gain_index[4]&0x6)<<7; /* Bit 6..7 */
(*bitstreamPtr) |= (enc_bits->gain_index[6]&0x18)<<3; /* Bit 8..9 */
(*bitstreamPtr) |= (enc_bits->gain_index[7]&0xC)<<2; /* Bit 10..11 */
(*bitstreamPtr) |= (enc_bits->gain_index[9]&0x10)>>1; /* Bit 12 */
(*bitstreamPtr) |= (enc_bits->gain_index[10]&0x8)>>1; /* Bit 13 */
(*bitstreamPtr) |= (enc_bits->gain_index[12]&0x10)>>3; /* Bit 14 */
(*bitstreamPtr) |= (enc_bits->gain_index[13]&0x8)>>3; /* Bit 15 */
}
bitstreamPtr++;
/* Class 3 bits of ULP */
/* 8:th to 14:th int16_t for 20 ms case
11:th to 17:th int16_t for 30 ms case */
tmpPtr=enc_bits->idxVec;
for (k=0; k<7; k++) {
(*bitstreamPtr) = 0;
for (i=14; i>=0; i-=2) {
(*bitstreamPtr) |= ((uint16_t)((*tmpPtr)&0x3))<<i; /* Bit 15-i..14-i*/
tmpPtr++;
}
bitstreamPtr++;
}
if (mode==20) {
/* 15:th int16_t */
(*bitstreamPtr) = ((uint16_t)((enc_bits->idxVec[56])&0x3))<<14;/* Bit 0..1 */
(*bitstreamPtr) |= (((enc_bits->cb_index[0])&1))<<13; /* Bit 2 */
(*bitstreamPtr) |= ((enc_bits->cb_index[1]))<<6; /* Bit 3..9 */
(*bitstreamPtr) |= ((enc_bits->cb_index[2])&0x7E)>>1; /* Bit 10..15 */
bitstreamPtr++;
/* 16:th int16_t */
(*bitstreamPtr) = ((uint16_t)((enc_bits->cb_index[2])&0x1))<<15;
/* Bit 0 */
(*bitstreamPtr) |= ((enc_bits->gain_index[0])&0x7)<<12; /* Bit 1..3 */
(*bitstreamPtr) |= ((enc_bits->gain_index[1])&0x3)<<10; /* Bit 4..5 */
(*bitstreamPtr) |= ((enc_bits->gain_index[2]))<<7; /* Bit 6..8 */
(*bitstreamPtr) |= ((enc_bits->cb_index[3])&0x1)<<6; /* Bit 9 */
(*bitstreamPtr) |= ((enc_bits->cb_index[4])&0x7E)>>1; /* Bit 10..15 */
bitstreamPtr++;
/* 17:th int16_t */
(*bitstreamPtr) = ((uint16_t)((enc_bits->cb_index[4])&0x1))<<15;
/* Bit 0 */
(*bitstreamPtr) |= (enc_bits->cb_index[5])<<8; /* Bit 1..7 */
(*bitstreamPtr) |= (enc_bits->cb_index[6]); /* Bit 8..15 */
bitstreamPtr++;
/* 18:th int16_t */
(*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[7]))<<8; /* Bit 0..7 */
(*bitstreamPtr) |= (enc_bits->cb_index[8]); /* Bit 8..15 */
bitstreamPtr++;
/* 19:th int16_t */
(*bitstreamPtr) = ((uint16_t)((enc_bits->gain_index[3])&0x3))<<14;
/* Bit 0..1 */
(*bitstreamPtr) |= ((enc_bits->gain_index[4])&0x3)<<12; /* Bit 2..3 */
(*bitstreamPtr) |= ((enc_bits->gain_index[5]))<<9; /* Bit 4..6 */
(*bitstreamPtr) |= ((enc_bits->gain_index[6])&0x7)<<6; /* Bit 7..9 */
(*bitstreamPtr) |= ((enc_bits->gain_index[7])&0x3)<<4; /* Bit 10..11 */
(*bitstreamPtr) |= (enc_bits->gain_index[8])<<1; /* Bit 12..14 */
} else { /* mode==30 */
/* 18:th int16_t */
(*bitstreamPtr) = ((uint16_t)((enc_bits->idxVec[56])&0x3))<<14;/* Bit 0..1 */
(*bitstreamPtr) |= (((enc_bits->idxVec[57])&0x3))<<12; /* Bit 2..3 */
(*bitstreamPtr) |= (((enc_bits->cb_index[0])&1))<<11; /* Bit 4 */
(*bitstreamPtr) |= ((enc_bits->cb_index[1]))<<4; /* Bit 5..11 */
(*bitstreamPtr) |= ((enc_bits->cb_index[2])&0x78)>>3; /* Bit 12..15 */
bitstreamPtr++;
/* 19:th int16_t */
(*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[2])&0x7)<<13;
/* Bit 0..2 */
(*bitstreamPtr) |= ((enc_bits->gain_index[0])&0x7)<<10; /* Bit 3..5 */
(*bitstreamPtr) |= ((enc_bits->gain_index[1])&0x3)<<8; /* Bit 6..7 */
(*bitstreamPtr) |= ((enc_bits->gain_index[2])&0x7)<<5; /* Bit 8..10 */
(*bitstreamPtr) |= ((enc_bits->cb_index[3])&0x1)<<4; /* Bit 11 */
(*bitstreamPtr) |= ((enc_bits->cb_index[4])&0x78)>>3; /* Bit 12..15 */
bitstreamPtr++;
/* 20:th int16_t */
(*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[4])&0x7)<<13;
/* Bit 0..2 */
(*bitstreamPtr) |= ((enc_bits->cb_index[5]))<<6; /* Bit 3..9 */
(*bitstreamPtr) |= ((enc_bits->cb_index[6])&0x1)<<5; /* Bit 10 */
(*bitstreamPtr) |= ((enc_bits->cb_index[7])&0xF8)>>3; /* Bit 11..15 */
bitstreamPtr++;
/* 21:st int16_t */
(*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[7])&0x7)<<13;
/* Bit 0..2 */
(*bitstreamPtr) |= ((enc_bits->cb_index[8]))<<5; /* Bit 3..10 */
(*bitstreamPtr) |= ((enc_bits->cb_index[9])&0x1)<<4; /* Bit 11 */
(*bitstreamPtr) |= ((enc_bits->cb_index[10])&0xF0)>>4; /* Bit 12..15 */
bitstreamPtr++;
/* 22:nd int16_t */
(*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[10])&0xF)<<12;
/* Bit 0..3 */
(*bitstreamPtr) |= ((enc_bits->cb_index[11]))<<4; /* Bit 4..11 */
(*bitstreamPtr) |= ((enc_bits->cb_index[12])&0x1)<<3; /* Bit 12 */
(*bitstreamPtr) |= ((enc_bits->cb_index[13])&0xE0)>>5; /* Bit 13..15 */
bitstreamPtr++;
/* 23:rd int16_t */
(*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[13])&0x1F)<<11;
/* Bit 0..4 */
(*bitstreamPtr) |= ((enc_bits->cb_index[14]))<<3; /* Bit 5..12 */
(*bitstreamPtr) |= ((enc_bits->gain_index[3])&0x3)<<1; /* Bit 13..14 */
(*bitstreamPtr) |= ((enc_bits->gain_index[4])&0x1); /* Bit 15 */
bitstreamPtr++;
/* 24:rd int16_t */
(*bitstreamPtr) = ((uint16_t)(enc_bits->gain_index[5]))<<13;
/* Bit 0..2 */
(*bitstreamPtr) |= ((enc_bits->gain_index[6])&0x7)<<10; /* Bit 3..5 */
(*bitstreamPtr) |= ((enc_bits->gain_index[7])&0x3)<<8; /* Bit 6..7 */
(*bitstreamPtr) |= ((enc_bits->gain_index[8]))<<5; /* Bit 8..10 */
(*bitstreamPtr) |= ((enc_bits->gain_index[9])&0xF)<<1; /* Bit 11..14 */
(*bitstreamPtr) |= ((enc_bits->gain_index[10])&0x4)>>2; /* Bit 15 */
bitstreamPtr++;
/* 25:rd int16_t */
(*bitstreamPtr) = ((uint16_t)(enc_bits->gain_index[10])&0x3)<<14;
/* Bit 0..1 */
(*bitstreamPtr) |= ((enc_bits->gain_index[11]))<<11; /* Bit 2..4 */
(*bitstreamPtr) |= ((enc_bits->gain_index[12])&0xF)<<7; /* Bit 5..8 */
(*bitstreamPtr) |= ((enc_bits->gain_index[13])&0x7)<<4; /* Bit 9..11 */
(*bitstreamPtr) |= ((enc_bits->gain_index[14]))<<1; /* Bit 12..14 */
}
/* Last bit is automatically zero */
return;
}