| /*********************************************************************** |
| Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| Redistribution and use in source and binary forms, with or without |
| modification, (subject to the limitations in the disclaimer below) |
| are permitted provided that the following conditions are met: |
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| this list of conditions and the following disclaimer. |
| - Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| - Neither the name of Skype Limited, nor the names of specific |
| contributors, may be used to endorse or promote products derived from |
| this software without specific prior written permission. |
| NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED |
| BY THIS LICENSE. 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, |
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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 ); |
| } |