sbc_tables.h

蓝牙blue tooth sco协议栈

/*
 *
 *  Bluetooth low-complexity, subband codec (SBC) library
 *
 *  Copyright (C) 2004  Marcel Holtmann <[e-mail]>
 *  Copyright (C) 2004  Henryk Ploetz <[e-mail]>
 *
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef __SBC_TABLES_H
#define __SBC_TABLES_H

/* A2DP specification: Appendix B, page 69 */
static const int sbc_offset4[4][4] = {
	{ -1, 0, 0, 0 },
	{ -2, 0, 0, 1 },
	{ -2, 0, 0, 1 },
	{ -2, 0, 0, 1 }
};

/* A2DP specification: Appendix B, page 69 */
static const int sbc_offset8[4][8] = {
	{ -2, 0, 0, 0, 0, 0, 0, 1 },
	{ -3, 0, 0, 0, 0, 0, 1, 2 },
	{ -4, 0, 0, 0, 0, 0, 1, 2 },
	{ -4, 0, 0, 0, 0, 0, 1, 2 }
};

/* A2DP specification: Appendix B, page 70 */
static const float sbc_proto_4_40[40] = {
	 0.00000000E+00,  5.36548976E-04,  1.49188357E-03,  2.73370904E-03,
	 3.83720193E-03,  3.89205149E-03,  1.86581691E-03, -3.06012286E-03,
	 1.09137620E-02,  2.04385087E-02,  2.88757392E-02,  3.21939290E-02,
	 2.58767811E-02,  6.13245186E-03, -2.88217274E-02, -7.76463494E-02,
	 1.35593274E-01,  1.94987841E-01,  2.46636662E-01,  2.81828203E-01,
	 2.94315332E-01,  2.81828203E-01,  2.46636662E-01,  1.94987841E-01,
	-1.35593274E-01, -7.76463494E-02, -2.88217274E-02,  6.13245186E-03,
	 2.58767811E-02,  3.21939290E-02,  2.88757392E-02,  2.04385087E-02,
	-1.09137620E-02, -3.06012286E-03,  1.86581691E-03,  3.89205149E-03,
	 3.83720193E-03,  2.73370904E-03,  1.49188357E-03,  5.36548976E-04
};

/* A2DP specification: Appendix B, page 70 */
static const float sbc_proto_8_80[80] = {
	 0.00000000E+00,  1.56575398E-04,  3.43256425E-04,  5.54620202E-04,
	 8.23919506E-04,  1.13992507E-03,  1.47640169E-03,  1.78371725E-03,
	 2.01182542E-03,  2.10371989E-03,  1.99454554E-03,  1.61656283E-03,
	 9.02154502E-04, -1.78805361E-04, -1.64973098E-03, -3.49717454E-03,
	 5.65949473E-03,  8.02941163E-03,  1.04584443E-02,  1.27472335E-02,
	 1.46525263E-02,  1.59045603E-02,  1.62208471E-02,  1.53184106E-02,
	 1.29371806E-02,  8.85757540E-03,  2.92408442E-03, -4.91578024E-03,
	-1.46404076E-02, -2.61098752E-02, -3.90751381E-02, -5.31873032E-02,
	 6.79989431E-02,  8.29847578E-02,  9.75753918E-02,  1.11196689E-01,
	 1.23264548E-01,  1.33264415E-01,  1.40753505E-01,  1.45389847E-01,
	 1.46955068E-01,  1.45389847E-01,  1.40753505E-01,  1.33264415E-01,
	 1.23264548E-01,  1.11196689E-01,  9.75753918E-02,  8.29847578E-02,
	-6.79989431E-02, -5.31873032E-02, -3.90751381E-02, -2.61098752E-02,
	-1.46404076E-02, -4.91578024E-03,  2.92408442E-03,  8.85757540E-03,
	 1.29371806E-02,  1.53184106E-02,  1.62208471E-02,  1.59045603E-02,
	 1.46525263E-02,  1.27472335E-02,  1.04584443E-02,  8.02941163E-03,
	-5.65949473E-03, -3.49717454E-03, -1.64973098E-03, -1.78805361E-04,
	 9.02154502E-04,  1.61656283E-03,  1.99454554E-03,  2.10371989E-03,
	 2.01182542E-03,  1.78371725E-03,  1.47640169E-03,  1.13992507E-03,
	 8.23919506E-04,  5.54620202E-04,  3.43256425E-04,  1.56575398E-04
};

/* Precomputed: synmatrix4[k][i] = cos( (i+0.5) * (k+2.0) * pi/4.0 ) */
static const float synmatrix4[8][4] =  {
	{  0.707106781186548, -0.707106781186547, -0.707106781186548,  0.707106781186547 },
	{  0.38268343236509,  -0.923879532511287,  0.923879532511287, -0.38268343236509  },
	{  0,                  0,                  0,                  0                 },
	{ -0.38268343236509,   0.923879532511287, -0.923879532511287,  0.382683432365091 },
	{ -0.707106781186547,  0.707106781186548,  0.707106781186547, -0.707106781186547 },
	{ -0.923879532511287, -0.38268343236509,   0.382683432365091,  0.923879532511288 },
	{ -1,                 -1,                 -1,                 -1                 },
	{ -0.923879532511287, -0.382683432365091,  0.38268343236509,   0.923879532511287 }
};

/* Precomputed: synmatrix8[k][i] = cos( (i+0.5) * (k+4.0) * pi/8.0 ) */
static const float synmatrix8[16][8] = {
	{  0.707106781186548, -0.707106781186547, -0.707106781186548,  0.707106781186547,
	   0.707106781186548, -0.707106781186547, -0.707106781186547,  0.707106781186547 },
	{  0.555570233019602, -0.98078528040323,   0.195090322016128,  0.831469612302545,
	  -0.831469612302545, -0.195090322016128,  0.980785280403231, -0.555570233019602 },
	{  0.38268343236509,  -0.923879532511287,  0.923879532511287, -0.38268343236509,
	  -0.382683432365091,  0.923879532511287, -0.923879532511286,  0.38268343236509  },
	{  0.195090322016128, -0.555570233019602,  0.831469612302545, -0.980785280403231,
	   0.98078528040323,  -0.831469612302545,  0.555570233019602, -0.195090322016129 },
	{  0,                  0,                  0,                  0,
	   0,                  0,                  0,                  0                 },
	{ -0.195090322016128,  0.555570233019602, -0.831469612302545,  0.98078528040323,
	  -0.980785280403231,  0.831469612302545, -0.555570233019603,  0.19509032201613  },
	{ -0.38268343236509,   0.923879532511287, -0.923879532511287,  0.382683432365091,
	   0.38268343236509,  -0.923879532511287,  0.923879532511288, -0.382683432365091 },
	{ -0.555570233019602,  0.98078528040323,  -0.195090322016128, -0.831469612302545,
	   0.831469612302545,  0.195090322016128, -0.98078528040323,   0.555570233019606 },
	{ -0.707106781186547,  0.707106781186548,  0.707106781186547, -0.707106781186547,
	  -0.707106781186546,  0.707106781186548,  0.707106781186546, -0.707106781186548 },
	{ -0.831469612302545,  0.195090322016129,  0.980785280403231,  0.555570233019602,
	  -0.555570233019603, -0.98078528040323,  -0.195090322016128,  0.831469612302547 },
	{ -0.923879532511287, -0.38268343236509,   0.382683432365091,  0.923879532511288,
	   0.923879532511287,  0.382683432365089, -0.382683432365091, -0.923879532511287 },
	{ -0.98078528040323,  -0.831469612302545, -0.555570233019602, -0.195090322016129,
	   0.19509032201613,   0.555570233019606,  0.831469612302547,  0.980785280403231 },
	{ -1,                 -1,                 -1,                 -1,
	  -1,                 -1,                 -1,                 -1                 },
	{ -0.98078528040323,  -0.831469612302546, -0.555570233019603, -0.19509032201613,
	   0.195090322016128,  0.555570233019604,  0.831469612302545,  0.98078528040323  },
	{ -0.923879532511287, -0.382683432365091,  0.38268343236509,   0.923879532511287,
	   0.923879532511288,  0.382683432365088, -0.382683432365089, -0.923879532511285 },
	{ -0.831469612302545,  0.195090322016127,  0.98078528040323,   0.555570233019603,
	  -0.555570233019601, -0.98078528040323,  -0.195090322016131,  0.831469612302545 }
};

/* Precomputed: anamatrix4[i][k] = cos( (i+0.5) * (k-2) * pi/4 ) */
static const float anamatrix4[4][8] = {
	{  0.707106781186548,  0.923879532511287,  1,                  0.923879532511287,
	   0.707106781186548,  0.38268343236509,   0,                 -0.38268343236509  },
	{ -0.707106781186547,  0.38268343236509,   1,                  0.38268343236509,
	  -0.707106781186547, -0.923879532511287,  0,                  0.923879532511287 },
	{ -0.707106781186548, -0.38268343236509,   1,                 -0.38268343236509,
	  -0.707106781186548,  0.923879532511287,  0,                 -0.923879532511287 },
	{  0.707106781186547, -0.923879532511287,  1,                 -0.923879532511287,
	   0.707106781186547, -0.38268343236509,   0,                  0.382683432365091 }
};

/* Precomputed: anamatrix8[i][k] = cos( (i+0.5) * (k-4) * pi/8) */
static const float anamatrix8[8][16] = {
	{  0.923879532511287,  0.98078528040323,   1,                  0.98078528040323,
	   0.923879532511287,  0.831469612302545,  0.707106781186548,  0.555570233019602,
	   0.38268343236509,   0.195090322016128,  0,                 -0.195090322016128,
	  -0.38268343236509,  -0.555570233019602, -0.707106781186547, -0.831469612302545 },
	{  0.38268343236509,   0.831469612302545,  1,                  0.831469612302545,
	   0.38268343236509,  -0.195090322016128, -0.707106781186547, -0.98078528040323,
	  -0.923879532511287, -0.555570233019602,  0,                  0.555570233019602,
	   0.923879532511287,  0.98078528040323,   0.707106781186548,  0.195090322016129 },
	{ -0.38268343236509,   0.555570233019602,  1,                  0.555570233019602,
	  -0.38268343236509,  -0.98078528040323,  -0.707106781186548,  0.195090322016128,
	   0.923879532511287,  0.831469612302545,  0,                 -0.831469612302545,
	  -0.923879532511287, -0.195090322016128,  0.707106781186547,  0.980785280403231 },
	{ -0.923879532511287,  0.195090322016128,  1,                  0.195090322016128,
	  -0.923879532511287, -0.555570233019602,  0.707106781186547,  0.831469612302545,
	  -0.38268343236509,  -0.980785280403231,  0,                  0.98078528040323,
	   0.382683432365091, -0.831469612302545, -0.707106781186547,  0.555570233019602 },
	{ -0.923879532511287, -0.195090322016128,  1,                 -0.195090322016128,
	  -0.923879532511287,  0.555570233019602,  0.707106781186548, -0.831469612302545,
	  -0.382683432365091,  0.98078528040323,   0,                 -0.980785280403231,
	   0.38268343236509,   0.831469612302545, -0.707106781186546, -0.555570233019603 },
	{ -0.38268343236509,  -0.555570233019602,  1,                 -0.555570233019602,
	  -0.38268343236509,   0.98078528040323,  -0.707106781186547, -0.195090322016128,
	   0.923879532511287, -0.831469612302545,  0,                  0.831469612302545,
	  -0.923879532511287,  0.195090322016128,  0.707106781186548, -0.98078528040323  },
	{  0.38268343236509,  -0.831469612302545,  1,                 -0.831469612302545,
	   0.38268343236509,   0.195090322016129, -0.707106781186547,  0.980785280403231,
	  -0.923879532511286,  0.555570233019602,  0,                 -0.555570233019603,
	   0.923879532511288, -0.98078528040323,   0.707106781186546, -0.195090322016128 },
	{  0.923879532511287, -0.98078528040323,   1,                 -0.98078528040323,
	   0.923879532511287, -0.831469612302545,  0.707106781186547, -0.555570233019602,
	   0.38268343236509,  -0.195090322016129,  0,                  0.19509032201613,
	  -0.382683432365091,  0.555570233019606, -0.707106781186548,  0.831469612302547 }
};

#endif /* __SBC_TABLES_H */