The Tor Browser: media/libopus/silk/stereo_encode

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

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     2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.

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    26 ***********************************************************************/

    28 #ifdef HAVE_CONFIG_H

    29 #include "config.h"

    30 #endif

    32 #include "main.h"

    34 /* Entropy code the mid/side quantization indices */

    35 void silk_stereo_encode_pred(

    36     ec_enc                      *psRangeEnc,                    /* I/O  Compressor data structure                   */

    37     opus_int8                   ix[ 2 ][ 3 ]                    /* I    Quantization indices                        */

    38 )

    39 {

    40     opus_int   n;

    42     /* Entropy coding */

    43     n = 5 * ix[ 0 ][ 2 ] + ix[ 1 ][ 2 ];

    44     silk_assert( n < 25 );

    45     ec_enc_icdf( psRangeEnc, n, silk_stereo_pred_joint_iCDF, 8 );

    46     for( n = 0; n < 2; n++ ) {

    47         silk_assert( ix[ n ][ 0 ] < 3 );

    48         silk_assert( ix[ n ][ 1 ] < STEREO_QUANT_SUB_STEPS );

    49         ec_enc_icdf( psRangeEnc, ix[ n ][ 0 ], silk_uniform3_iCDF, 8 );

    50         ec_enc_icdf( psRangeEnc, ix[ n ][ 1 ], silk_uniform5_iCDF, 8 );

    51     }

    52 }

    54 /* Entropy code the mid-only flag */

    55 void silk_stereo_encode_mid_only(

    56     ec_enc                      *psRangeEnc,                    /* I/O  Compressor data structure                   */

    57     opus_int8                   mid_only_flag

    58 )

    59 {

    60     /* Encode flag that only mid channel is coded */

    61     ec_enc_icdf( psRangeEnc, mid_only_flag, silk_stereo_only_code_mid_iCDF, 8 );

    62 }

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