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/*
** Copyright 2003-2010, VisualOn, Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
/***********************************************************************
File: bits.c
Description: Performs bit stream manipulation
************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include "typedef.h"
#include "basic_op.h"
#include "cnst.h"
#include "bits.h"
#include "acelp.h"
#include "dtx.h"
#include "mime_io.tab"
int PackBits(Word16 prms[], /* i: analysis parameters */
Word16 coding_mode, /* i: coding bit-stream ratio mode */
Word16 mode, /* i: coding bit-stream ratio mode*/
Coder_State *st /*i/o: coder global parameters struct */
)
{
Word16 i, frame_type;
UWord8 temp;
UWord8 *stream_ptr;
Word16 bitstreamformat = st->frameType;
unsigned short* dataOut = st->outputStream;
if (coding_mode == MRDTX)
{
st->sid_update_counter--;
if (st->prev_ft == TX_SPEECH)
{
frame_type = TX_SID_FIRST;
st->sid_update_counter = 3;
} else
{
if ((st->sid_handover_debt > 0) && (st->sid_update_counter > 2))
{
/* ensure extra updates are properly delayed after a possible SID_FIRST */
frame_type = TX_SID_UPDATE;
st->sid_handover_debt--;
} else
{
if (st->sid_update_counter == 0)
{
frame_type = TX_SID_UPDATE;
st->sid_update_counter = 8;
} else
{
frame_type = TX_NO_DATA;
}
}
}
} else
{
st->sid_update_counter = 8;
frame_type = TX_SPEECH;
}
st->prev_ft = frame_type;
if(bitstreamformat == 0) /* default file format */
{
*(dataOut) = TX_FRAME_TYPE;
*(dataOut + 1) = frame_type;
*(dataOut + 2) = mode;
for (i = 0; i < nb_of_bits[coding_mode]; i++)
{
*(dataOut + 3 + i) = prms[i];
}
return (3 + nb_of_bits[coding_mode])<<1;
} else
{
if (bitstreamformat == 1) /* ITU file format */
{
*(dataOut) = 0x6b21;
if(frame_type != TX_NO_DATA && frame_type != TX_SID_FIRST)
{
*(dataOut + 1) = nb_of_bits[coding_mode];
for (i = 0; i < nb_of_bits[coding_mode]; i++)
{
if(prms[i] == BIT_0){
*(dataOut + 2 + i) = BIT_0_ITU;
}
else{
*(dataOut + 2 + i) = BIT_1_ITU;
}
}
return (2 + nb_of_bits[coding_mode])<<1;
} else
{
*(dataOut + 1) = 0;
return 2<<1;
}
} else /* MIME/storage file format */
{
#define MRSID 9
/* change mode index in case of SID frame */
if (coding_mode == MRDTX)
{
coding_mode = MRSID;
if (frame_type == TX_SID_FIRST)
{
for (i = 0; i < NBBITS_SID; i++) prms[i] = BIT_0;
}
}
/* -> force NO_DATA frame */
if (coding_mode < 0 || coding_mode > 15 || (coding_mode > MRSID && coding_mode < 14))
{
coding_mode = 15;
}
/* mark empty frames between SID updates as NO_DATA frames */
if (coding_mode == MRSID && frame_type == TX_NO_DATA)
{
coding_mode = 15;
}
/* set pointer for packed frame, note that we handle data as bytes */
stream_ptr = (UWord8*)dataOut;
/* insert table of contents (ToC) byte at the beginning of the packet */
*stream_ptr = toc_byte[coding_mode];
stream_ptr++;
temp = 0;
/* sort and pack AMR-WB speech or SID bits */
for (i = 1; i < unpacked_size[coding_mode] + 1; i++)
{
if (prms[sort_ptr[coding_mode][i-1]] == BIT_1)
{
temp++;
}
if (i&0x7)
{
temp <<= 1;
}
else
{
*stream_ptr = temp;
stream_ptr++;
temp = 0;
}
}
/* insert SID type indication and speech mode in case of SID frame */
if (coding_mode == MRSID)
{
if (frame_type == TX_SID_UPDATE)
{
temp++;
}
temp <<= 4;
temp += mode & 0x000F;
}
/* insert unused bits (zeros) at the tail of the last byte */
if (unused_size[coding_mode])
{
temp <<= (unused_size[coding_mode] - 1);
}
*stream_ptr = temp;
/* write packed frame into file (1 byte added to cover ToC entry) */
return (1 + packed_size[coding_mode]);
}
}
}
/*-----------------------------------------------------*
* Parm_serial -> convert parameters to serial stream *
*-----------------------------------------------------*/
void Parm_serial(
Word16 value, /* input : parameter value */
Word16 no_of_bits, /* input : number of bits */
Word16 ** prms
)
{
Word16 i, bit;
*prms += no_of_bits;
for (i = 0; i < no_of_bits; i++)
{
bit = (Word16) (value & 0x0001); /* get lsb */
if (bit == 0)
*--(*prms) = BIT_0;
else
*--(*prms) = BIT_1;
value >>= 1;
}
*prms += no_of_bits;
return;
}
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