1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libopus/silk/stereo_encode_pred.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,62 @@
1.4 +/***********************************************************************
1.5 +Copyright (c) 2006-2011, Skype Limited. All rights reserved.
1.6 +Redistribution and use in source and binary forms, with or without
1.7 +modification, are permitted provided that the following conditions
1.8 +are met:
1.9 +- Redistributions of source code must retain the above copyright notice,
1.10 +this list of conditions and the following disclaimer.
1.11 +- Redistributions in binary form must reproduce the above copyright
1.12 +notice, this list of conditions and the following disclaimer in the
1.13 +documentation and/or other materials provided with the distribution.
1.14 +- Neither the name of Internet Society, IETF or IETF Trust, nor the
1.15 +names of specific contributors, may be used to endorse or promote
1.16 +products derived from this software without specific prior written
1.17 +permission.
1.18 +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
1.19 +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.20 +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.21 +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
1.22 +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.23 +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.24 +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.25 +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.26 +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.27 +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.28 +POSSIBILITY OF SUCH DAMAGE.
1.29 +***********************************************************************/
1.30 +
1.31 +#ifdef HAVE_CONFIG_H
1.32 +#include "config.h"
1.33 +#endif
1.34 +
1.35 +#include "main.h"
1.36 +
1.37 +/* Entropy code the mid/side quantization indices */
1.38 +void silk_stereo_encode_pred(
1.39 + ec_enc *psRangeEnc, /* I/O Compressor data structure */
1.40 + opus_int8 ix[ 2 ][ 3 ] /* I Quantization indices */
1.41 +)
1.42 +{
1.43 + opus_int n;
1.44 +
1.45 + /* Entropy coding */
1.46 + n = 5 * ix[ 0 ][ 2 ] + ix[ 1 ][ 2 ];
1.47 + silk_assert( n < 25 );
1.48 + ec_enc_icdf( psRangeEnc, n, silk_stereo_pred_joint_iCDF, 8 );
1.49 + for( n = 0; n < 2; n++ ) {
1.50 + silk_assert( ix[ n ][ 0 ] < 3 );
1.51 + silk_assert( ix[ n ][ 1 ] < STEREO_QUANT_SUB_STEPS );
1.52 + ec_enc_icdf( psRangeEnc, ix[ n ][ 0 ], silk_uniform3_iCDF, 8 );
1.53 + ec_enc_icdf( psRangeEnc, ix[ n ][ 1 ], silk_uniform5_iCDF, 8 );
1.54 + }
1.55 +}
1.56 +
1.57 +/* Entropy code the mid-only flag */
1.58 +void silk_stereo_encode_mid_only(
1.59 + ec_enc *psRangeEnc, /* I/O Compressor data structure */
1.60 + opus_int8 mid_only_flag
1.61 +)
1.62 +{
1.63 + /* Encode flag that only mid channel is coded */
1.64 + ec_enc_icdf( psRangeEnc, mid_only_flag, silk_stereo_only_code_mid_iCDF, 8 );
1.65 +}
