ref: e80265f904b1e0e1b7f1abf37fa811aecf3aba36
dir: /amr-wb/bits.c/
/*------------------------------------------------------------------------*
* BITS.C *
*------------------------------------------------------------------------*
* 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 "count.h"
#include "dtx.h"
#include "mime_io.tab"
/*-----------------------------------------------------*
* Write_serial -> write serial stream into a file *
*-----------------------------------------------------*/
Word16 Init_write_serial(TX_State ** st)
{
TX_State *s;
/* allocate memory */
test();
if ((s = (TX_State *) malloc(sizeof(TX_State))) == NULL)
{
fprintf(stderr, "write_serial_init: can not malloc state structure\n");
return -1;
}
Reset_write_serial(s);
*st = s;
return 0;
}
Word16 Close_write_serial(TX_State *st)
{
/* allocate memory */
test();
if (st != NULL)
{
free(st);
st = NULL;
return 0;
}
return 1;
}
void Reset_write_serial(TX_State * st)
{
st->sid_update_counter = 3;
st->sid_handover_debt = 0;
st->prev_ft = TX_SPEECH;
}
void Write_serial(FILE * fp, Word16 prms[], int coding_mode, int mode, TX_State *st, int bitstreamformat)
{
Word16 i, frame_type;
Word16 stream[AMR_WB_SIZE_MAX];
UWord8 temp;
UWord8 *stream_ptr;
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 */
{
stream[0] = TX_FRAME_TYPE;
stream[1] = frame_type;
stream[2] = mode;
for (i = 0; i < nb_of_bits[coding_mode]; i++)
{
stream[3 + i] = prms[i];
}
fwrite(stream, sizeof(Word16), 3 + nb_of_bits[coding_mode], fp);
} else
{
if (bitstreamformat == 1) /* ITU file format */
{
stream[0] = 0x6b21;
if(frame_type != TX_NO_DATA && frame_type != TX_SID_FIRST)
{
stream[1]=nb_of_bits[coding_mode];
for (i = 0; i < nb_of_bits[coding_mode]; i++)
{
if(prms[i] == BIT_0){
stream[2 + i] = BIT_0_ITU;
}
else{
stream[2 + i] = BIT_1_ITU;
}
}
fwrite(stream, sizeof(Word16), 2 + nb_of_bits[coding_mode], fp);
} else
{
stream[1] = 0;
fwrite(stream, sizeof(Word16), 2, fp);
}
} 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;
}
}
/* we cannot handle unspecified frame types (modes 10 - 13) */
/* -> 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*)stream;
/* 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 % 8)
{
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) */
fwrite(stream, sizeof(UWord8), 1 + packed_size[coding_mode], fp);
}
}
return;
}
/*-----------------------------------------------------*
* Read_serial -> read serial stream into a file *
*-----------------------------------------------------*/
Word16 Init_read_serial(RX_State ** st)
{
RX_State *s;
/* allocate memory */
test();
if ((s = (RX_State *) malloc(sizeof(RX_State))) == NULL)
{
fprintf(stderr, "read_serial_init: can not malloc state structure\n");
return -1;
}
Reset_read_serial(s);
*st = s;
return 0;
}
Word16 Close_read_serial(RX_State *st)
{
/* allocate memory */
test();
if (st != NULL)
{
free(st);
st = NULL;
return 0;
}
return 1;
}
void Reset_read_serial(RX_State * st)
{
st->prev_ft = RX_SPEECH_GOOD;
st->prev_mode = 0;
}
Word16 Read_serial(FILE * fp, Word16 prms[], Word16 * frame_type, Word16 * mode, RX_State *st, int bitstreamformat)
{
Word16 n, n1, type_of_frame_type, coding_mode, datalen, i;
UWord8 toc, q, temp, *packet_ptr, packet[64];
if(bitstreamformat == 0) /* default file format */
{
n = (Word16) fread(&type_of_frame_type, sizeof(Word16), 1, fp);
n = (Word16) (n + fread(frame_type, sizeof(Word16), 1, fp));
n = (Word16) (n + fread(mode, sizeof(Word16), 1, fp));
coding_mode = *mode;
if(*mode < 0 || *mode > NUM_OF_MODES-1)
{
fprintf(stderr, "Invalid mode received: %d (check file format).\n", *mode);
exit(-1);
}
if (n == 3)
{
if (type_of_frame_type == TX_FRAME_TYPE)
{
switch (*frame_type)
{
case TX_SPEECH:
*frame_type = RX_SPEECH_GOOD;
break;
case TX_SID_FIRST:
*frame_type = RX_SID_FIRST;
break;
case TX_SID_UPDATE:
*frame_type = RX_SID_UPDATE;
break;
case TX_NO_DATA:
*frame_type = RX_NO_DATA;
break;
}
} else if (type_of_frame_type != RX_FRAME_TYPE)
{
fprintf(stderr, "Wrong type of frame type:%d.\n", type_of_frame_type);
}
if ((*frame_type == RX_SID_FIRST) | (*frame_type == RX_SID_UPDATE) | (*frame_type == RX_NO_DATA) | (*frame_type == RX_SID_BAD))
{
coding_mode = MRDTX;
}
n = (Word16) fread(prms, sizeof(Word16), nb_of_bits[coding_mode], fp);
if (n != nb_of_bits[coding_mode])
n = 0;
}
return (n);
} else
{
if (bitstreamformat == 1) /* ITU file format */
{
n = (Word16) fread(&type_of_frame_type, sizeof(Word16), 1, fp);
n = (Word16)(n+fread(&datalen, sizeof(Word16), 1, fp));
if(n == 2)
{
if(type_of_frame_type == 0x6b20) /* bad frame */
{
*frame_type = RX_SPEECH_LOST;
*mode = st->prev_mode;
}
else if(type_of_frame_type == 0x6b21) /* good frame */
{
if(datalen == 0) /* RX_NO_DATA frame type */
{
if(st->prev_ft == RX_SPEECH_GOOD)
{
*frame_type = RX_SID_FIRST;
}
else
{
*frame_type = RX_NO_DATA;
}
*mode = st->prev_mode;
}
else
{
coding_mode = -1;
for(i=NUM_OF_MODES-1; i>=0; i--)
{
if(datalen == nb_of_bits[i])
{
coding_mode = i;
}
}
if(coding_mode == -1)
{
fprintf(stderr, "\n\n ERROR: Invalid number of data bits received [%d]\n\n", datalen);
exit(-1);
}
if(coding_mode == NUM_OF_MODES-1) /* DTX frame type */
{
*frame_type = RX_SID_UPDATE;
*mode = st->prev_mode;
}
else
{
*frame_type = RX_SPEECH_GOOD;
*mode = coding_mode;
}
}
st->prev_mode = *mode;
st->prev_ft = *frame_type;
}
else {
fprintf(stderr, "\n\n ERROR: Invalid ITU file format \n\n");
exit(-1);
}
}
n1 = fread(prms, sizeof(Word16), datalen, fp);
n += n1;
for(i=0; i<n1; i++)
{
if(prms[i] <= BIT_0_ITU) prms[i] = BIT_0;
else prms[i] = BIT_1;
}
return(n);
} else /* MIME/storage file format */
{
/* read ToC byte, return immediately if no more data available */
if (fread(&toc, sizeof(UWord8), 1, fp) == 0)
{
return 0;
}
/* extract q and mode from ToC */
q = (toc >> 2) & 0x01;
*mode = (toc >> 3) & 0x0F;
/* read speech bits, return with empty frame if mismatch between mode info and available data */
if ((Word16)fread(packet, sizeof(UWord8), packed_size[*mode], fp) != packed_size[*mode])
{
return 0;
}
packet_ptr = (UWord8*)packet;
temp = *packet_ptr;
packet_ptr++;
/* unpack and unsort speech or SID bits */
for (i = 1; i < unpacked_size[*mode] + 1; i++)
{
if (temp & 0x80) prms[sort_ptr[*mode][i-1]] = BIT_1;
else prms[sort_ptr[*mode][i-1]] = BIT_0;
if (i % 8)
{
temp <<= 1;
}
else
{
temp = *packet_ptr;
packet_ptr++;
}
}
/* set frame type */
switch (*mode)
{
case MODE_7k:
case MODE_9k:
case MODE_12k:
case MODE_14k:
case MODE_16k:
case MODE_18k:
case MODE_20k:
case MODE_23k:
case MODE_24k:
if (q) *frame_type = RX_SPEECH_GOOD;
else *frame_type = RX_SPEECH_BAD;
break;
case MRSID:
if (q)
{
if (temp & 0x80) *frame_type = RX_SID_UPDATE;
else *frame_type = RX_SID_FIRST;
}
else
{
*frame_type = RX_SID_BAD;
}
/* read speech mode indication */
coding_mode = (temp >> 3) & 0x0F;
/* set mode index */
*mode = st->prev_mode;
break;
case 14: /* SPEECH_LOST */
*frame_type = RX_SPEECH_LOST;
*mode = st->prev_mode;
break;
case 15: /* NO_DATA */
*frame_type = RX_NO_DATA;
*mode = st->prev_mode;
break;
default: /* replace frame with unused mode index by NO_DATA frame */
*frame_type = RX_NO_DATA;
*mode = st->prev_mode;
break;
}
st->prev_mode = *mode;
/* return 1 to indicate succesfully parsed frame */
return 1;
}
#undef MRSID
}
}
/*-----------------------------------------------------*
* 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; move16();
for (i = 0; i < no_of_bits; i++)
{
bit = (Word16) (value & 0x0001); logic16(); /* get lsb */
test();move16();
if (bit == 0)
*--(*prms) = BIT_0;
else
*--(*prms) = BIT_1;
value = shr(value, 1); move16();
}
*prms += no_of_bits; move16();
return;
}
/*----------------------------------------------------*
* Serial_parm -> convert serial stream to parameters *
*----------------------------------------------------*/
Word16 Serial_parm( /* Return the parameter */
Word16 no_of_bits, /* input : number of bits */
Word16 ** prms
)
{
Word16 value, i;
Word16 bit;
value = 0; move16();
for (i = 0; i < no_of_bits; i++)
{
value = shl(value, 1);
bit = *((*prms)++); move16();
test();move16();
if (bit == BIT_1)
value = add(value, 1);
}
return (value);
}