?? interf_enc.cpp
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/*************************************************************************/
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/*************************************************************************/
/*
* ===================================================================
* TS 26.104
* REL-5 V5.4.0 2004-03
* REL-6 V6.1.0 2004-03
* 3GPP AMR Floating-point Speech Codec
* ===================================================================
*
*/
/*
* interf_enc.c
*
*
* Project:
* AMR Floating-Point Codec
*
* This module contains all the functions needed encoding 160
* 16-bit speech samples to AMR encoder parameters.
*
*/
/*
* include files
*/
//#include <stdlib.h>
//#include <stdio.h>
//#include <memory.h>
#include "stdafx.h"
//#include "interf_enc.h"
//#include "sp_enc.h"
//#include "interf_rom.h"
//
/*
* EncoderMMS
*
*
* Parameters:
* mode I: AMR mode
* param I: Encoder output parameters
* stream O: packed speech frame
* frame_type I: frame type (DTX)
* speech_mode I: speech mode (DTX)
*
* Function:
* Pack encoder output parameters to octet structure according
* importance table and AMR file storage format according to
* RFC 3267.
* Returns:
* number of octets
*/
static INT32 EncoderMMS( enum Mode mode, INT16 *param, UINT8 *stream,
enum TXFrameType frame_type, enum Mode speech_mode )
{
INT32 j = 0, k;
INT16 *mask;
memset(stream, 0, block_size[mode]);
*stream = toc_byte[mode];
stream++;
if ( mode == 15 )
{
return 1;
}
else if ( mode == MRDTX )
{
mask = order_MRDTX;
for ( j = 1; j < 36; j++ )
{
if ( param[ * mask] & *( mask + 1 ) )
*stream += 0x01;
mask += 2;
if ( j % 8 )
*stream <<= 1;
else
stream++;
}
/* add SID type information */
if ( frame_type == TX_SID_UPDATE )
*stream += 0x01;
*stream <<= 3;
/* speech mode indication */
*stream += ( UINT8 )(speech_mode & 0x0007);
*stream <<= 1;
/* don't shift at the end of the function */
return 6;
}
else if ( mode == MR475 )
{
mask = order_MR475;
for ( j = 1; j < 96; j++ )
{
if ( param[ * mask] & *( mask + 1 ) )
*stream += 0x01;
if ( j % 8 )
*stream <<= 1;
else
stream++;
}
}
else if ( mode == MR515 )
{
mask = order_MR515;
for ( j = 1; j < 104; j++ )
{
if ( param[ * mask] & *( mask + 1 ) )
*stream += 0x01;
mask += 2;
if ( j % 8 )
*stream <<= 1;
else
stream++;
}
}
else if ( mode == MR59 )
{
mask = order_MR59;
for ( j = 1; j < 119; j++ )
{
if ( param[ * mask] & *( mask + 1 ) )
*stream += 0x01;
mask += 2;
if ( j % 8 )
*stream <<= 1;
else
stream++;
}
}
else if ( mode == MR67 )
{
mask = order_MR67;
for ( j = 1; j < 135; j++ )
{
if ( param[ * mask] & *( mask + 1 ) )
*stream += 0x01;
mask += 2;
if ( j % 8 )
*stream <<= 1;
else
stream++;
}
}
else if ( mode == MR74 )
{
mask = order_MR74;
for ( j = 1; j < 149; j++ )
{
if ( param[ * mask] & *( mask + 1 ) )
*stream += 0x01;
mask += 2;
if ( j % 8 )
*stream <<= 1;
else
stream++;
}
}
else if ( mode == MR795 )
{
mask = order_MR795;
for ( j = 1; j < 160; j++ )
{
if ( param[ * mask] & *( mask + 1 ) )
*stream += 0x01;
mask += 2;
if ( j % 8 )
*stream <<= 1;
else
stream++;
}
}
else if ( mode == MR102 )
{
mask = order_MR102;
for ( j = 1; j < 205; j++ )
{
if ( param[ * mask] & *( mask + 1 ) )
*stream += 0x01;
mask += 2;
if ( j % 8 )
*stream <<= 1;
else
stream++;
}
}
else if ( mode == MR122 )
{
mask = order_MR122;
for ( j = 1; j < 245; j++ )
{
if ( param[ * mask] & *( mask + 1 ) )
*stream += 0x01;
mask += 2;
if ( j % 8 )
*stream <<= 1;
else
stream++;
}
}
/* shift remaining bits */
k = j % 8;
if ( k )
{
*stream <<= ( 8 - k );
}
return( (INT32)block_size[mode] );
}
/*
* Sid_Sync_reset
*
*
* Parameters:
* st O: state structure
*
* Function:
* Initializes state memory
*
* Returns:
* void
*/
static void Sid_Sync_reset( AMR_Encode_State *st )
{
st->sid_update_counter = 3;
st->sid_handover_debt = 0;
st->prev_ft = TX_SPEECH_GOOD;
}
/*
* Encoder_Interface_Encode
*
*
* Parameters:
* st I: pointer to state structure
* mode I: Speech Mode
* speech I: Input speech
* serial O: Output octet structure 3GPP or
* ETSI serial stream
* force_speech I: Force speech in DTX
*
* Function:
* Encoding and packing one frame of speech
*
* Returns:
* number of octets
*/
INT32 Encoder_Interface_Encode( void *st, enum Mode mode, INT16 *speech, UINT8 *serial, INT32 force_speech)
/*
#ifndef ETSI
UINT8 *serial,
#else
INT16 *serial,
#endif
INT32 force_speech )
*/
{
INT16 prm[PRMNO_MR122]; /* speech parameters, max size */
const INT16 *homing; /* pointer to homing frame */
INT16 homing_size; /* frame size for homing frame */
AMR_Encode_State * s;
enum TXFrameType txFrameType; /* frame type */
INT32 i, noHoming = 0;
/*
* used encoder mode,
* if used_mode == -1, force VAD on
*/
enum Mode used_mode = (Mode)-force_speech;
s = ( AMR_Encode_State * )st;
/*
* Checks if all samples of the input frame matches the encoder
* homing frame pattern, which is 0x0008 for all samples.
*/
for ( i = 0; i < 160; i++ )
{
noHoming = speech[i] ^ 0x0008;
if ( noHoming )
break;
}
if (noHoming)
{
Speech_Encode_Frame( s->encoderState, mode, speech, prm, &used_mode );
}
else
{
switch ( mode )
{
case MR122:
homing = dhf_MR122;
homing_size = 18;
break;
case MR102:
homing = dhf_MR102;
homing_size = 12;
break;
case MR795:
homing = dhf_MR795;
homing_size = 8;
break;
case MR74:
homing = dhf_MR74;
homing_size = 7;
break;
case MR67:
homing = dhf_MR67;
homing_size = 7;
break;
case MR59:
homing = dhf_MR59;
homing_size = 7;
break;
case MR515:
homing = dhf_MR515;
homing_size = 7;
break;
case MR475:
homing = dhf_MR475;
homing_size = 7;
break;
default:
homing = NULL;
homing_size = 0;
break;
}
for( i = 0; i < homing_size; i++)
{
prm[i] = homing[i];
}
/* rest of the parameters are zero */
memset(&prm[homing_size], 0, (PRMNO_MR122 - homing_size) << 1);
used_mode = mode;
}
if ( used_mode == MRDTX )
{
s->sid_update_counter--;
if ( s->prev_ft == TX_SPEECH_GOOD )
{
txFrameType = TX_SID_FIRST;
s->sid_update_counter = 3;
}
else
{
/* TX_SID_UPDATE or TX_NO_DATA */
if ( ( s->sid_handover_debt > 0 ) && ( s->sid_update_counter > 2 ) )
{
/*
* ensure extra updates are properly delayed after
* a possible SID_FIRST
*/
txFrameType = TX_SID_UPDATE;
s->sid_handover_debt--;
}
else
{
if ( s->sid_update_counter == 0 )
{
txFrameType = TX_SID_UPDATE;
s->sid_update_counter = 8;
}
else
{
txFrameType = TX_NO_DATA;
used_mode = (Mode)15;
}
}
}
}
else
{
s->sid_update_counter = 8;
txFrameType = TX_SPEECH_GOOD;
}
s->prev_ft = txFrameType;
if ( noHoming == 0 )
{
Speech_Encode_Frame_reset( s->encoderState, s->dtx );
Sid_Sync_reset( s );
}
/*
#ifndef ETSI
#ifdef IF2
return Encoder3GPP( used_mode, prm, serial, txFrameType, mode );
#else
*/
return EncoderMMS( used_mode, prm, serial, txFrameType, mode );
/*
#endif
#else
Prm2Bits( used_mode, prm, &serial[1] );
serial[0] = ( INT16 )txFrameType;
serial[245] = ( INT16 )mode;
return 500;
#endif
*/
}
/*
* Encoder_Interface_init
*
*
* Parameters:
* dtx I: DTX flag
*
* Function:
* Allocates state memory and initializes state memory
*
* Returns:
* pointer to encoder interface structure
*/
void * Encoder_Interface_init( INT32 dtx )
{
AMR_Encode_State * s = NULL;
/* allocate memory */
s = ( AMR_Encode_State * ) new AMR_Encode_State;
if ( s == NULL )
{
return NULL;
}
s->encoderState = Speech_Encode_Frame_init( dtx );
Sid_Sync_reset( s );
s->dtx = dtx;
return s;
}
/*
* DecoderInterfaceExit
*
*
* Parameters:
* state I: state structure
*
* Function:
* The memory used for state memory is freed
*
* Returns:
* Void
*/
void Encoder_Interface_exit( void *state )
{
AMR_Encode_State * s;
s = ( AMR_Encode_State * )state;
/* mcFree memory */
// Speech_Encode_Frame_exit( &s->encoderState );
delete s->encoderState;
delete s;
state = NULL;
}
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