jamulus/libs/opus/silk/stereo_encode_pred.c
2013-12-21 13:40:43 +00:00

62 lines
2.8 KiB
C
Executable file

/***********************************************************************
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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***********************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "main.h"
/* Entropy code the mid/side quantization indices */
void silk_stereo_encode_pred(
ec_enc *psRangeEnc, /* I/O Compressor data structure */
opus_int8 ix[ 2 ][ 3 ] /* I Quantization indices */
)
{
opus_int n;
/* Entropy coding */
n = 5 * ix[ 0 ][ 2 ] + ix[ 1 ][ 2 ];
silk_assert( n < 25 );
ec_enc_icdf( psRangeEnc, n, silk_stereo_pred_joint_iCDF, 8 );
for( n = 0; n < 2; n++ ) {
silk_assert( ix[ n ][ 0 ] < 3 );
silk_assert( ix[ n ][ 1 ] < STEREO_QUANT_SUB_STEPS );
ec_enc_icdf( psRangeEnc, ix[ n ][ 0 ], silk_uniform3_iCDF, 8 );
ec_enc_icdf( psRangeEnc, ix[ n ][ 1 ], silk_uniform5_iCDF, 8 );
}
}
/* Entropy code the mid-only flag */
void silk_stereo_encode_mid_only(
ec_enc *psRangeEnc, /* I/O Compressor data structure */
opus_int8 mid_only_flag
)
{
/* Encode flag that only mid channel is coded */
ec_enc_icdf( psRangeEnc, mid_only_flag, silk_stereo_only_code_mid_iCDF, 8 );
}