103302b375
commit 5b64cf7c4d67af9050bc959996ef976ce6326888
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date: Thu May 19 16:40:35 2011 -0400
Fixes a few bugs introduced in the latest update
commit b91eb86025d2de3c4cf04f4fb1aa48a28ad676a3
Author: Timothy B. Terriberry <tterribe@xiph.org>
Date: Thu May 19 16:12:02 2011 -0400
build_draft.sh fixes
commit 0b10c30db7ad60ff7d4bfc1139bdb86e0543c035
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date: Thu May 19 15:30:21 2011 -0400
Fixes the draft build
commit 164424cded5978e657105104e171ac202dde5e5b
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date: Thu May 19 15:00:23 2011 -0400
Updated build system
commit 188d9fcba8c3a1b1ad67c67c430e1b37e3658a40
Author: Koen Vos <koen.vos@skype.net>
Date: Thu May 19 17:14:57 2011 -0400
SILK/Opus update
63 lines
3.3 KiB
C
63 lines
3.3 KiB
C
/***********************************************************************
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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, (subject to the limitations in the disclaimer below)
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are permitted provided that the following conditions 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 Skype Limited, nor the names of specific
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contributors, may be used to endorse or promote products derived from
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this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#include "silk_main.h"
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/* Decode mid/side predictors */
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void silk_stereo_decode_pred(
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ec_dec *psRangeDec, /* I/O Compressor data structure */
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SKP_int *decode_only_mid, /* O Flag that only mid channel has been coded */
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SKP_int32 pred_Q13[] /* O Predictors */
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)
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{
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SKP_int n, ix[ 2 ][ 3 ];
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SKP_int32 low_Q13, step_Q13;
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/* Entropy decoding */
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n = ec_dec_icdf( psRangeDec, silk_stereo_pred_joint_iCDF, 8 );
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ix[ 0 ][ 2 ] = SKP_DIV32_16( n, 5 );
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ix[ 1 ][ 2 ] = n - 5 * ix[ 0 ][ 2 ];
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for( n = 0; n < 2; n++ ) {
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ix[ n ][ 0 ] = ec_dec_icdf( psRangeDec, silk_uniform3_iCDF, 8 );
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ix[ n ][ 1 ] = ec_dec_icdf( psRangeDec, silk_uniform5_iCDF, 8 );
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}
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/* Dequantize */
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for( n = 0; n < 2; n++ ) {
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ix[ n ][ 0 ] += 3 * ix[ n ][ 2 ];
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low_Q13 = silk_stereo_pred_quant_Q13[ ix[ n ][ 0 ] ];
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step_Q13 = SKP_SMULWB( silk_stereo_pred_quant_Q13[ ix[ n ][ 0 ] + 1 ] - low_Q13,
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SILK_FIX_CONST( 0.5 / STEREO_QUANT_SUB_STEPS, 16 ) );
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pred_Q13[ n ] = SKP_SMLABB( low_Q13, step_Q13, 2 * ix[ n ][ 1 ] + 1 );
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}
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/* Subtract second from first predictor (helps when actually applying these) */
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pred_Q13[ 0 ] -= pred_Q13[ 1 ];
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/* Decode flag that only mid channel is coded */
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*decode_only_mid = ec_dec_icdf( psRangeDec, silk_stereo_only_code_mid_iCDF, 8 );
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}
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