1*a58d3d2aSXin Li /***********************************************************************
2*a58d3d2aSXin Li Copyright (c) 2006-2011, Skype Limited. All rights reserved.
3*a58d3d2aSXin Li Redistribution and use in source and binary forms, with or without
4*a58d3d2aSXin Li modification, are permitted provided that the following conditions
5*a58d3d2aSXin Li are met:
6*a58d3d2aSXin Li - Redistributions of source code must retain the above copyright notice,
7*a58d3d2aSXin Li this list of conditions and the following disclaimer.
8*a58d3d2aSXin Li - Redistributions in binary form must reproduce the above copyright
9*a58d3d2aSXin Li notice, this list of conditions and the following disclaimer in the
10*a58d3d2aSXin Li documentation and/or other materials provided with the distribution.
11*a58d3d2aSXin Li - Neither the name of Internet Society, IETF or IETF Trust, nor the
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13*a58d3d2aSXin Li products derived from this software without specific prior written
14*a58d3d2aSXin Li permission.
15*a58d3d2aSXin Li THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16*a58d3d2aSXin Li AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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26*a58d3d2aSXin Li ***********************************************************************/
27*a58d3d2aSXin Li
28*a58d3d2aSXin Li #ifdef HAVE_CONFIG_H
29*a58d3d2aSXin Li #include "config.h"
30*a58d3d2aSXin Li #endif
31*a58d3d2aSXin Li
32*a58d3d2aSXin Li #include "main.h"
33*a58d3d2aSXin Li
34*a58d3d2aSXin Li /* Entropy code the mid/side quantization indices */
silk_stereo_encode_pred(ec_enc * psRangeEnc,opus_int8 ix[2][3])35*a58d3d2aSXin Li void silk_stereo_encode_pred(
36*a58d3d2aSXin Li ec_enc *psRangeEnc, /* I/O Compressor data structure */
37*a58d3d2aSXin Li opus_int8 ix[ 2 ][ 3 ] /* I Quantization indices */
38*a58d3d2aSXin Li )
39*a58d3d2aSXin Li {
40*a58d3d2aSXin Li opus_int n;
41*a58d3d2aSXin Li
42*a58d3d2aSXin Li /* Entropy coding */
43*a58d3d2aSXin Li n = 5 * ix[ 0 ][ 2 ] + ix[ 1 ][ 2 ];
44*a58d3d2aSXin Li celt_assert( n < 25 );
45*a58d3d2aSXin Li ec_enc_icdf( psRangeEnc, n, silk_stereo_pred_joint_iCDF, 8 );
46*a58d3d2aSXin Li for( n = 0; n < 2; n++ ) {
47*a58d3d2aSXin Li celt_assert( ix[ n ][ 0 ] < 3 );
48*a58d3d2aSXin Li celt_assert( ix[ n ][ 1 ] < STEREO_QUANT_SUB_STEPS );
49*a58d3d2aSXin Li ec_enc_icdf( psRangeEnc, ix[ n ][ 0 ], silk_uniform3_iCDF, 8 );
50*a58d3d2aSXin Li ec_enc_icdf( psRangeEnc, ix[ n ][ 1 ], silk_uniform5_iCDF, 8 );
51*a58d3d2aSXin Li }
52*a58d3d2aSXin Li }
53*a58d3d2aSXin Li
54*a58d3d2aSXin Li /* Entropy code the mid-only flag */
silk_stereo_encode_mid_only(ec_enc * psRangeEnc,opus_int8 mid_only_flag)55*a58d3d2aSXin Li void silk_stereo_encode_mid_only(
56*a58d3d2aSXin Li ec_enc *psRangeEnc, /* I/O Compressor data structure */
57*a58d3d2aSXin Li opus_int8 mid_only_flag
58*a58d3d2aSXin Li )
59*a58d3d2aSXin Li {
60*a58d3d2aSXin Li /* Encode flag that only mid channel is coded */
61*a58d3d2aSXin Li ec_enc_icdf( psRangeEnc, mid_only_flag, silk_stereo_only_code_mid_iCDF, 8 );
62*a58d3d2aSXin Li }
63