mp3dec_layer3_int.c

来自「这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数」· C语言 代码 · 共 602 行 · 第 1/5 页

/*//////////////////////////////////////////////////////////////////////////////
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//          Copyright(c) 2003-2005 Intel Corporation. All Rights Reserved.
//
*/

#include "mp3dec_own_int.h"

static struct {
    int     l[22];
    int     s[39];
    int     m[38];
} sfBandWidths[2][3] = {
    { /* MPEG 2 */
        { /* sampling frequency = 22.05 kHz */
            /* long bloks */
            {  6,  6,  6,  6,  6,  6,  8, 10, 12, 14,
              16, 20, 24, 28, 32, 38, 46, 52, 60, 68,
              58, 54
            },
            /* short bloks */
            {  4,  4,  4,  4,  4,  4,  4,  4,  4,  6,
               6,  6,  6,  6,  6,  8,  8,  8, 10, 10,
              10, 14, 14, 14, 18, 18, 18, 26, 26, 26,
              32, 32, 32, 42, 42, 42, 18, 18, 18
            },
            /* mixed bloks */
            {  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,
               6,  6,  8,  8,  8, 10, 10, 10, 14, 14,
              14, 18, 18, 18, 26, 26, 26, 32, 32, 32,
              42, 42, 42, 18, 18, 18,  0,  0
            }
        },
        { /* sampling frequency = 24 kHz */
            /* long bloks */
            {  6,  6,  6,  6,  6,  6,  8, 10, 12, 14,
              16, 18, 22, 26, 32, 38, 46, 54, 62, 70,
              76, 36
            },
            /* short bloks */
            {  4,  4,  4,  4,  4,  4,  4,  4,  4,  6,
               6,  6,  8,  8,  8, 10, 10, 10, 12, 12,
              12, 14, 14, 14, 18, 18, 18, 24, 24, 24,
              32, 32, 32, 44, 44, 44, 12, 12, 12
            },
            /* mixed bloks */
            {  6,  6,  6,  6,  6,  6,  6,  6,  6,  8,
               8,  8, 10, 10, 10, 12, 12, 12, 14, 14,
              14, 18, 18, 18, 24, 24, 24, 32, 32, 32,
              44, 44, 44, 12, 12, 12,  0,  0
            }
        },
        { /* sampling frequency = 16 kHz       */
            /* long bloks */
            {  6,  6,  6,  6,  6,  6,  8, 10, 12, 14,
              16, 20, 24, 28, 32, 38, 46, 52, 60, 68,
              58, 54
            },
            /* short bloks */
            {  4,  4,  4,  4,  4,  4,  4,  4,  4,  6,
               6,  6,  8,  8,  8, 10, 10, 10, 12, 12,
              12, 14, 14, 14, 18, 18, 18, 24, 24, 24,
              30, 30, 30, 40, 40, 40, 18, 18, 18
            },
            /* mixed bloks */
            {  6,  6,  6,  6,  6,  6,  6,  6,  6,  8,
               8,  8, 10, 10, 10, 12, 12, 12, 14, 14,
              14, 18, 18, 18, 24, 24, 24, 30, 30, 30,
              40, 40, 40, 18, 18, 18,  0,  0
            }
        }
    },
    { /* MPEG 1 */
        { /* sampling frequency = 44.1 kHz */
            /* long bloks */
            {  4,  4,  4,  4,  4,  4,  6,  6,  8,  8,
              10, 12, 16, 20, 24, 28, 34, 42, 50, 54,
              76, 158
            },
            /* short bloks */
            {  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,
               4,  4,  6,  6,  6,  8,  8,  8, 10, 10,
              10, 12, 12, 12, 14, 14, 14, 18, 18, 18,
              22, 22, 22, 30, 30, 30, 56, 56, 56
            },
            /* mixed bloks */
            {  4,  4,  4,  4,  4,  4,  6,  6,  4,  4,
               4,  6,  6,  6,  8,  8,  8, 10, 10, 10,
              12, 12, 12, 14, 14, 14, 18, 18, 18, 22,
              22, 22, 30, 30, 30, 56, 56, 56
            }
        },
        { /* sampling frequency = 48 kHz */
            /* long bloks */
            {  4,  4,  4,  4,  4,  4,  6,  6,  6,  8,
              10, 12, 16, 18, 22, 28, 34, 40, 46, 54,
              54, 192
            },
            /* short bloks */
            {  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,
               4,  4,  6,  6,  6,  6,  6,  6, 10, 10,
              10, 12, 12, 12, 14, 14, 14, 16, 16, 16,
              20, 20, 20, 26, 26, 26, 66, 66, 66
            },
            /* mixed bloks */
            {  4,  4,  4,  4,  4,  4,  6,  6,  4,  4,
               4,  6,  6,  6,  6,  6,  6, 10, 10, 10,
              12, 12, 12, 14, 14, 14, 16, 16, 16, 20,
              20, 20, 26, 26, 26, 66, 66, 66
            }
        },
        { /* sampling frequency = 32 kHz */
            /* long bloks */
            {  4,  4,  4,  4,  4,  4,  6,  6,  8, 10,
              12, 16, 20, 24, 30, 38, 46, 56, 68, 84,
              102, 26
            },