diff options
Diffstat (limited to 'thirdparty/opus/silk/stereo_quant_pred.c')
| -rw-r--r-- | thirdparty/opus/silk/stereo_quant_pred.c | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/thirdparty/opus/silk/stereo_quant_pred.c b/thirdparty/opus/silk/stereo_quant_pred.c deleted file mode 100644 index d4ced6c3e8..0000000000 --- a/thirdparty/opus/silk/stereo_quant_pred.c +++ /dev/null @@ -1,73 +0,0 @@ -/*********************************************************************** -Copyright (c) 2006-2011, Skype Limited. All rights reserved. -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions -are met: -- Redistributions of source code must retain the above copyright notice, -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 Internet Society, IETF or IETF Trust, nor the -names of specific contributors, may be used to endorse or promote -products derived from this software without specific prior written -permission. -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 -CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -POSSIBILITY OF SUCH DAMAGE. -***********************************************************************/ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "main.h" - -/* Quantize mid/side predictors */ -void silk_stereo_quant_pred( - opus_int32 pred_Q13[], /* I/O Predictors (out: quantized) */ - opus_int8 ix[ 2 ][ 3 ] /* O Quantization indices */ -) -{ - opus_int i, j, n; - opus_int32 low_Q13, step_Q13, lvl_Q13, err_min_Q13, err_Q13, quant_pred_Q13 = 0; - - /* Quantize */ - for( n = 0; n < 2; n++ ) { - /* Brute-force search over quantization levels */ - err_min_Q13 = silk_int32_MAX; - for( i = 0; i < STEREO_QUANT_TAB_SIZE - 1; i++ ) { - low_Q13 = silk_stereo_pred_quant_Q13[ i ]; - step_Q13 = silk_SMULWB( silk_stereo_pred_quant_Q13[ i + 1 ] - low_Q13, - SILK_FIX_CONST( 0.5 / STEREO_QUANT_SUB_STEPS, 16 ) ); - for( j = 0; j < STEREO_QUANT_SUB_STEPS; j++ ) { - lvl_Q13 = silk_SMLABB( low_Q13, step_Q13, 2 * j + 1 ); - err_Q13 = silk_abs( pred_Q13[ n ] - lvl_Q13 ); - if( err_Q13 < err_min_Q13 ) { - err_min_Q13 = err_Q13; - quant_pred_Q13 = lvl_Q13; - ix[ n ][ 0 ] = i; - ix[ n ][ 1 ] = j; - } else { - /* Error increasing, so we're past the optimum */ - goto done; - } - } - } - done: - ix[ n ][ 2 ] = silk_DIV32_16( ix[ n ][ 0 ], 3 ); - ix[ n ][ 0 ] -= ix[ n ][ 2 ] * 3; - pred_Q13[ n ] = quant_pred_Q13; - } - - /* Subtract second from first predictor (helps when actually applying these) */ - pred_Q13[ 0 ] -= pred_Q13[ 1 ]; -} |