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authorhairball <xhairball@gmail.com>2014-02-08 03:21:02 +0000
committerTim Angus <tim@ngus.net>2014-06-17 17:43:38 +0100
commit35064811c0ac104acddd7777e00bfd9e054c2db6 (patch)
tree4063389141542093ecc3de47e3999ed099520621 /src/opus-1.0.2/silk/NLSF_decode.c
parent1778f3fb8cabe7400011c84331018b0ebf6a44b1 (diff)
Upgrade opus 1.0.2 -> 1.1
Diffstat (limited to 'src/opus-1.0.2/silk/NLSF_decode.c')
-rw-r--r--src/opus-1.0.2/silk/NLSF_decode.c101
1 files changed, 0 insertions, 101 deletions
diff --git a/src/opus-1.0.2/silk/NLSF_decode.c b/src/opus-1.0.2/silk/NLSF_decode.c
deleted file mode 100644
index e007c49a..00000000
--- a/src/opus-1.0.2/silk/NLSF_decode.c
+++ /dev/null
@@ -1,101 +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"
-
-/* Predictive dequantizer for NLSF residuals */
-static inline void silk_NLSF_residual_dequant( /* O Returns RD value in Q30 */
- opus_int16 x_Q10[], /* O Output [ order ] */
- const opus_int8 indices[], /* I Quantization indices [ order ] */
- const opus_uint8 pred_coef_Q8[], /* I Backward predictor coefs [ order ] */
- const opus_int quant_step_size_Q16, /* I Quantization step size */
- const opus_int16 order /* I Number of input values */
-)
-{
- opus_int i, out_Q10, pred_Q10;
-
- out_Q10 = 0;
- for( i = order-1; i >= 0; i-- ) {
- pred_Q10 = silk_RSHIFT( silk_SMULBB( out_Q10, (opus_int16)pred_coef_Q8[ i ] ), 8 );
- out_Q10 = silk_LSHIFT( indices[ i ], 10 );
- if( out_Q10 > 0 ) {
- out_Q10 = silk_SUB16( out_Q10, SILK_FIX_CONST( NLSF_QUANT_LEVEL_ADJ, 10 ) );
- } else if( out_Q10 < 0 ) {
- out_Q10 = silk_ADD16( out_Q10, SILK_FIX_CONST( NLSF_QUANT_LEVEL_ADJ, 10 ) );
- }
- out_Q10 = silk_SMLAWB( pred_Q10, (opus_int32)out_Q10, quant_step_size_Q16 );
- x_Q10[ i ] = out_Q10;
- }
-}
-
-
-/***********************/
-/* NLSF vector decoder */
-/***********************/
-void silk_NLSF_decode(
- opus_int16 *pNLSF_Q15, /* O Quantized NLSF vector [ LPC_ORDER ] */
- opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */
- const silk_NLSF_CB_struct *psNLSF_CB /* I Codebook object */
-)
-{
- opus_int i;
- opus_uint8 pred_Q8[ MAX_LPC_ORDER ];
- opus_int16 ec_ix[ MAX_LPC_ORDER ];
- opus_int16 res_Q10[ MAX_LPC_ORDER ];
- opus_int16 W_tmp_QW[ MAX_LPC_ORDER ];
- opus_int32 W_tmp_Q9, NLSF_Q15_tmp;
- const opus_uint8 *pCB_element;
-
- /* Decode first stage */
- pCB_element = &psNLSF_CB->CB1_NLSF_Q8[ NLSFIndices[ 0 ] * psNLSF_CB->order ];
- for( i = 0; i < psNLSF_CB->order; i++ ) {
- pNLSF_Q15[ i ] = silk_LSHIFT( (opus_int16)pCB_element[ i ], 7 );
- }
-
- /* Unpack entropy table indices and predictor for current CB1 index */
- silk_NLSF_unpack( ec_ix, pred_Q8, psNLSF_CB, NLSFIndices[ 0 ] );
-
- /* Predictive residual dequantizer */
- silk_NLSF_residual_dequant( res_Q10, &NLSFIndices[ 1 ], pred_Q8, psNLSF_CB->quantStepSize_Q16, psNLSF_CB->order );
-
- /* Weights from codebook vector */
- silk_NLSF_VQ_weights_laroia( W_tmp_QW, pNLSF_Q15, psNLSF_CB->order );
-
- /* Apply inverse square-rooted weights and add to output */
- for( i = 0; i < psNLSF_CB->order; i++ ) {
- W_tmp_Q9 = silk_SQRT_APPROX( silk_LSHIFT( (opus_int32)W_tmp_QW[ i ], 18 - NLSF_W_Q ) );
- NLSF_Q15_tmp = silk_ADD32( pNLSF_Q15[ i ], silk_DIV32_16( silk_LSHIFT( (opus_int32)res_Q10[ i ], 14 ), W_tmp_Q9 ) );
- pNLSF_Q15[ i ] = (opus_int16)silk_LIMIT( NLSF_Q15_tmp, 0, 32767 );
- }
-
- /* NLSF stabilization */
- silk_NLSF_stabilize( pNLSF_Q15, psNLSF_CB->deltaMin_Q15, psNLSF_CB->order );
-}