/* Encodes signs of excitation */
void SKP_Silk_encode_signs(
SKP_Silk_range_coder_state *sRC, /* I/O Range coder state */
const SKP_int8 q[], /* I Pulse signal */
const SKP_int length, /* I Length of input */
const SKP_int sigtype, /* I Signal type */
const SKP_int QuantOffsetType, /* I Quantization offset type */
const SKP_int RateLevelIndex /* I Rate level index */
)
{
SKP_int i;
SKP_int inData;
SKP_uint16 cdf[ 3 ];
i = SKP_SMULBB( N_RATE_LEVELS - 1, SKP_LSHIFT( sigtype, 1 ) + QuantOffsetType ) + RateLevelIndex;
cdf[ 0 ] = 0;
cdf[ 1 ] = SKP_Silk_sign_CDF[ i ];
cdf[ 2 ] = 65535;
for( i = 0; i < length; i++ ) {
if( q[ i ] != 0 ) {
inData = SKP_enc_map( q[ i ] ); /* - = 0, + = 1 */
SKP_Silk_range_encoder( sRC, inData, cdf );
}
}
}
/* Encodes signs of excitation */
void silk_encode_signs(
ec_enc *psRangeEnc, /* I/O Compressor data structure */
const SKP_int8 pulses[], /* I pulse signal */
SKP_int length, /* I length of input */
const SKP_int signalType, /* I Signal type */
const SKP_int quantOffsetType, /* I Quantization offset type */
const SKP_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
)
{
SKP_int i, j, p;
SKP_uint8 icdf[ 2 ];
const SKP_int8 *q_ptr;
const SKP_uint8 *icdf_ptr;
icdf[ 1 ] = 0;
q_ptr = pulses;
i = SKP_SMULBB( 6, SKP_ADD_LSHIFT( quantOffsetType, signalType, 1 ) );
icdf_ptr = &silk_sign_iCDF[ i ];
length = SKP_RSHIFT( length + SHELL_CODEC_FRAME_LENGTH/2, LOG2_SHELL_CODEC_FRAME_LENGTH );
for( i = 0; i < length; i++ ) {
p = sum_pulses[ i ];
if( p > 0 ) {
icdf[ 0 ] = icdf_ptr[ SKP_min( p - 1, 5 ) ];
for( j = 0; j < SHELL_CODEC_FRAME_LENGTH; j++ ) {
if( q_ptr[ j ] != 0 ) {
ec_enc_icdf( psRangeEnc, SKP_enc_map( q_ptr[ j ]), icdf, 8 );
}
}
}
q_ptr += SHELL_CODEC_FRAME_LENGTH;
}
}
