1 /*

     2 * Copyright (c) 2010 Ixonos Plc.

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - Initial contribution

    11 *

    12 * Contributors:

    13 * Ixonos Plc

    14 *

    15 * Description:

    16 *

    17 */

    18 

    19 

    20 #ifndef DECPARAM_H_

    21 #define DECPARAM_H_

    22 

    23 /*-- Project Headers --*/

    24 #include "defines.h"

    25 

    26 /*

    27    Purpose:     The # of filter branches of the polyphase filterbank

    28                 to be discarded. By default 2 lowest and highest branches

    29         will be discarded.

    30    Explanation: - */

    31 #define WINDOW_PRUNING_START_IDX 2

    32 

    33 /*

    34    Purpose:     Parameters that control the decoding complexity.

    35    Explanation: - */

    36 typedef struct Out_ComplexityStr

    37 {

    38   BOOL no_antialias;    /* If TRUE, no alias-reduction is performed. */

    39   int16 subband_pairs;  /* # of subband pairs for alias-reduction.   */

    40   int16 imdct_subbands; /* # of IMDCT subbands.                      */

    41 

    42 } Out_Complexity;

    43 

    44 /*

    45    Purpose:     Parameters that control the output stream.

    46    Explanation: - */

    47 typedef struct Out_ParamStr

    48 {

    49   int32 sampling_frequency; /* Output sampling frequency.           */

    50   int16 num_out_channels;   /* # of output channels.                */

    51   int16 decim_factor;       /* Decimation factor.                   */

    52   int16 num_samples;        /* # of output samples per subband.     */

    53   int16 num_out_samples;    /* Total # of output samples per frame. */

    54 

    55   /*

    56    * Specifies how many window coefficients are discarded from the synthesis

    57    * window. In units of 'SBLIMIT' samples. The start index can vary

    58    * between 0 and 'NUM_SUBWIN', but if you don't want to reduce the overall

    59    * audio quality, the default value 2 (or 0) should be used.

    60    */

    61   int16 window_pruning_idx;

    62   int16 num_subwindows;

    63   int16 window_offset;

    64 

    65 } Out_Param;

    66 

    67 /*

    68    Purpose:     Mapping of above structures into one common structure.

    69    Explanation: - */

    70 typedef struct Out_InfoStr

    71 {

    72   Out_Param *out_param;

    73   Out_Complexity *out_complex;

    74 

    75 } Out_Info;

    76 

    77 #endif /* DECPARAM_H_ */