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63 lines
2.8 KiB
C
63 lines
2.8 KiB
C
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/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Internet Society, IETF or IETF Trust, nor the
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names of specific contributors, may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS”
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "main.h"
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/* Entropy code the mid/side quantization indices */
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void silk_stereo_encode_pred(
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ec_enc *psRangeEnc, /* I/O Compressor data structure */
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opus_int8 ix[ 2 ][ 3 ] /* I Quantization indices */
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)
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{
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opus_int n;
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/* Entropy coding */
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n = 5 * ix[ 0 ][ 2 ] + ix[ 1 ][ 2 ];
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silk_assert( n < 25 );
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ec_enc_icdf( psRangeEnc, n, silk_stereo_pred_joint_iCDF, 8 );
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for( n = 0; n < 2; n++ ) {
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silk_assert( ix[ n ][ 0 ] < 3 );
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silk_assert( ix[ n ][ 1 ] < STEREO_QUANT_SUB_STEPS );
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ec_enc_icdf( psRangeEnc, ix[ n ][ 0 ], silk_uniform3_iCDF, 8 );
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ec_enc_icdf( psRangeEnc, ix[ n ][ 1 ], silk_uniform5_iCDF, 8 );
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}
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}
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/* Entropy code the mid-only flag */
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void silk_stereo_encode_mid_only(
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ec_enc *psRangeEnc, /* I/O Compressor data structure */
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opus_int8 mid_only_flag
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)
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{
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/* Encode flag that only mid channel is coded */
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ec_enc_icdf( psRangeEnc, mid_only_flag, silk_stereo_only_code_mid_iCDF, 8 );
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}
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