/[openvortex]/alsa/drivers/opl4/opl4_synth.c
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Diff of /alsa/drivers/opl4/opl4_synth.c

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revision 1.1 by vizard, Sat May 31 02:35:13 2003 UTC revision 1.2 by vizard, Sun Jun 15 21:01:32 2003 UTC
# Line 1  Line 1 
1  #define __NO_VERSION__  #define __NO_VERSION__
2    #include "../../alsa-kernel/drivers/opl4/opl4_synth.c"
 /*  
  * OPL4 MIDI synthesizer functions  
  *  
  * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>  
  * All rights reserved.  
  *  
  * Redistribution and use in source and binary forms, with or without  
  * modification, are permitted provided that the following conditions  
  * are met:  
  * 1. Redistributions of source code must retain the above copyright  
  *    notice, this list of conditions, and the following disclaimer,  
  *    without modification.  
  * 2. The name of the author may not be used to endorse or promote products  
  *    derived from this software without specific prior written permission.  
  *  
  * Alternatively, this software may be distributed and/or modified under the  
  * terms of the GNU General Public License as published by the Free Software  
  * Foundation; either version 2 of the License, or (at your option) any later  
  * version.  
  *  
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND  
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE  
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE  
  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR  
  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL  
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS  
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)  
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT  
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY  
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF  
  * SUCH DAMAGE.  
  */  
   
 #include "opl4_local.h"  
 #include <linux/delay.h>  
 #include <sound/asoundef.h>  
   
 /* GM2 controllers */  
 #ifndef MIDI_CTL_RELEASE_TIME  
 #define MIDI_CTL_RELEASE_TIME   0x48  
 #define MIDI_CTL_ATTACK_TIME    0x49  
 #define MIDI_CTL_DECAY_TIME     0x4b  
 #define MIDI_CTL_VIBRATO_RATE   0x4c  
 #define MIDI_CTL_VIBRATO_DEPTH  0x4d  
 #define MIDI_CTL_VIBRATO_DELAY  0x4e  
 #endif  
   
 /*  
  * This table maps 100/128 cents to F_NUMBER.  
  */  
 static const s16 snd_opl4_pitch_map[0x600] = {  
         0x000,0x000,0x001,0x001,0x002,0x002,0x003,0x003,  
         0x004,0x004,0x005,0x005,0x006,0x006,0x006,0x007,  
         0x007,0x008,0x008,0x009,0x009,0x00a,0x00a,0x00b,  
         0x00b,0x00c,0x00c,0x00d,0x00d,0x00d,0x00e,0x00e,  
         0x00f,0x00f,0x010,0x010,0x011,0x011,0x012,0x012,  
         0x013,0x013,0x014,0x014,0x015,0x015,0x015,0x016,  
         0x016,0x017,0x017,0x018,0x018,0x019,0x019,0x01a,  
         0x01a,0x01b,0x01b,0x01c,0x01c,0x01d,0x01d,0x01e,  
         0x01e,0x01e,0x01f,0x01f,0x020,0x020,0x021,0x021,  
         0x022,0x022,0x023,0x023,0x024,0x024,0x025,0x025,  
         0x026,0x026,0x027,0x027,0x028,0x028,0x029,0x029,  
         0x029,0x02a,0x02a,0x02b,0x02b,0x02c,0x02c,0x02d,  
         0x02d,0x02e,0x02e,0x02f,0x02f,0x030,0x030,0x031,  
         0x031,0x032,0x032,0x033,0x033,0x034,0x034,0x035,  
         0x035,0x036,0x036,0x037,0x037,0x038,0x038,0x038,  
         0x039,0x039,0x03a,0x03a,0x03b,0x03b,0x03c,0x03c,  
         0x03d,0x03d,0x03e,0x03e,0x03f,0x03f,0x040,0x040,  
         0x041,0x041,0x042,0x042,0x043,0x043,0x044,0x044,  
         0x045,0x045,0x046,0x046,0x047,0x047,0x048,0x048,  
         0x049,0x049,0x04a,0x04a,0x04b,0x04b,0x04c,0x04c,  
         0x04d,0x04d,0x04e,0x04e,0x04f,0x04f,0x050,0x050,  
         0x051,0x051,0x052,0x052,0x053,0x053,0x054,0x054,  
         0x055,0x055,0x056,0x056,0x057,0x057,0x058,0x058,  
         0x059,0x059,0x05a,0x05a,0x05b,0x05b,0x05c,0x05c,  
         0x05d,0x05d,0x05e,0x05e,0x05f,0x05f,0x060,0x060,  
         0x061,0x061,0x062,0x062,0x063,0x063,0x064,0x064,  
         0x065,0x065,0x066,0x066,0x067,0x067,0x068,0x068,  
         0x069,0x069,0x06a,0x06a,0x06b,0x06b,0x06c,0x06c,  
         0x06d,0x06d,0x06e,0x06e,0x06f,0x06f,0x070,0x071,  
         0x071,0x072,0x072,0x073,0x073,0x074,0x074,0x075,  
         0x075,0x076,0x076,0x077,0x077,0x078,0x078,0x079,  
         0x079,0x07a,0x07a,0x07b,0x07b,0x07c,0x07c,0x07d,  
         0x07d,0x07e,0x07e,0x07f,0x07f,0x080,0x081,0x081,  
         0x082,0x082,0x083,0x083,0x084,0x084,0x085,0x085,  
         0x086,0x086,0x087,0x087,0x088,0x088,0x089,0x089,  
         0x08a,0x08a,0x08b,0x08b,0x08c,0x08d,0x08d,0x08e,  
         0x08e,0x08f,0x08f,0x090,0x090,0x091,0x091,0x092,  
         0x092,0x093,0x093,0x094,0x094,0x095,0x096,0x096,  
         0x097,0x097,0x098,0x098,0x099,0x099,0x09a,0x09a,  
         0x09b,0x09b,0x09c,0x09c,0x09d,0x09d,0x09e,0x09f,  
         0x09f,0x0a0,0x0a0,0x0a1,0x0a1,0x0a2,0x0a2,0x0a3,  
         0x0a3,0x0a4,0x0a4,0x0a5,0x0a6,0x0a6,0x0a7,0x0a7,  
         0x0a8,0x0a8,0x0a9,0x0a9,0x0aa,0x0aa,0x0ab,0x0ab,  
         0x0ac,0x0ad,0x0ad,0x0ae,0x0ae,0x0af,0x0af,0x0b0,  
         0x0b0,0x0b1,0x0b1,0x0b2,0x0b2,0x0b3,0x0b4,0x0b4,  
         0x0b5,0x0b5,0x0b6,0x0b6,0x0b7,0x0b7,0x0b8,0x0b8,  
         0x0b9,0x0ba,0x0ba,0x0bb,0x0bb,0x0bc,0x0bc,0x0bd,  
         0x0bd,0x0be,0x0be,0x0bf,0x0c0,0x0c0,0x0c1,0x0c1,  
         0x0c2,0x0c2,0x0c3,0x0c3,0x0c4,0x0c4,0x0c5,0x0c6,  
         0x0c6,0x0c7,0x0c7,0x0c8,0x0c8,0x0c9,0x0c9,0x0ca,  
         0x0cb,0x0cb,0x0cc,0x0cc,0x0cd,0x0cd,0x0ce,0x0ce,  
         0x0cf,0x0d0,0x0d0,0x0d1,0x0d1,0x0d2,0x0d2,0x0d3,  
         0x0d3,0x0d4,0x0d5,0x0d5,0x0d6,0x0d6,0x0d7,0x0d7,  
         0x0d8,0x0d8,0x0d9,0x0da,0x0da,0x0db,0x0db,0x0dc,  
         0x0dc,0x0dd,0x0de,0x0de,0x0df,0x0df,0x0e0,0x0e0,  
         0x0e1,0x0e1,0x0e2,0x0e3,0x0e3,0x0e4,0x0e4,0x0e5,  
         0x0e5,0x0e6,0x0e7,0x0e7,0x0e8,0x0e8,0x0e9,0x0e9,  
         0x0ea,0x0eb,0x0eb,0x0ec,0x0ec,0x0ed,0x0ed,0x0ee,  
         0x0ef,0x0ef,0x0f0,0x0f0,0x0f1,0x0f1,0x0f2,0x0f3,  
         0x0f3,0x0f4,0x0f4,0x0f5,0x0f5,0x0f6,0x0f7,0x0f7,  
         0x0f8,0x0f8,0x0f9,0x0f9,0x0fa,0x0fb,0x0fb,0x0fc,  
         0x0fc,0x0fd,0x0fd,0x0fe,0x0ff,0x0ff,0x100,0x100,  
         0x101,0x101,0x102,0x103,0x103,0x104,0x104,0x105,  
         0x106,0x106,0x107,0x107,0x108,0x108,0x109,0x10a,  
         0x10a,0x10b,0x10b,0x10c,0x10c,0x10d,0x10e,0x10e,  
         0x10f,0x10f,0x110,0x111,0x111,0x112,0x112,0x113,  
         0x114,0x114,0x115,0x115,0x116,0x116,0x117,0x118,  
         0x118,0x119,0x119,0x11a,0x11b,0x11b,0x11c,0x11c,  
         0x11d,0x11e,0x11e,0x11f,0x11f,0x120,0x120,0x121,  
         0x122,0x122,0x123,0x123,0x124,0x125,0x125,0x126,  
         0x126,0x127,0x128,0x128,0x129,0x129,0x12a,0x12b,  
         0x12b,0x12c,0x12c,0x12d,0x12e,0x12e,0x12f,0x12f,  
         0x130,0x131,0x131,0x132,0x132,0x133,0x134,0x134,  
         0x135,0x135,0x136,0x137,0x137,0x138,0x138,0x139,  
         0x13a,0x13a,0x13b,0x13b,0x13c,0x13d,0x13d,0x13e,  
         0x13e,0x13f,0x140,0x140,0x141,0x141,0x142,0x143,  
         0x143,0x144,0x144,0x145,0x146,0x146,0x147,0x148,  
         0x148,0x149,0x149,0x14a,0x14b,0x14b,0x14c,0x14c,  
         0x14d,0x14e,0x14e,0x14f,0x14f,0x150,0x151,0x151,  
         0x152,0x153,0x153,0x154,0x154,0x155,0x156,0x156,  
         0x157,0x157,0x158,0x159,0x159,0x15a,0x15b,0x15b,  
         0x15c,0x15c,0x15d,0x15e,0x15e,0x15f,0x160,0x160,  
         0x161,0x161,0x162,0x163,0x163,0x164,0x165,0x165,  
         0x166,0x166,0x167,0x168,0x168,0x169,0x16a,0x16a,  
         0x16b,0x16b,0x16c,0x16d,0x16d,0x16e,0x16f,0x16f,  
         0x170,0x170,0x171,0x172,0x172,0x173,0x174,0x174,  
         0x175,0x175,0x176,0x177,0x177,0x178,0x179,0x179,  
         0x17a,0x17a,0x17b,0x17c,0x17c,0x17d,0x17e,0x17e,  
         0x17f,0x180,0x180,0x181,0x181,0x182,0x183,0x183,  
         0x184,0x185,0x185,0x186,0x187,0x187,0x188,0x188,  
         0x189,0x18a,0x18a,0x18b,0x18c,0x18c,0x18d,0x18e,  
         0x18e,0x18f,0x190,0x190,0x191,0x191,0x192,0x193,  
         0x193,0x194,0x195,0x195,0x196,0x197,0x197,0x198,  
         0x199,0x199,0x19a,0x19a,0x19b,0x19c,0x19c,0x19d,  
         0x19e,0x19e,0x19f,0x1a0,0x1a0,0x1a1,0x1a2,0x1a2,  
         0x1a3,0x1a4,0x1a4,0x1a5,0x1a6,0x1a6,0x1a7,0x1a8,  
         0x1a8,0x1a9,0x1a9,0x1aa,0x1ab,0x1ab,0x1ac,0x1ad,  
         0x1ad,0x1ae,0x1af,0x1af,0x1b0,0x1b1,0x1b1,0x1b2,  
         0x1b3,0x1b3,0x1b4,0x1b5,0x1b5,0x1b6,0x1b7,0x1b7,  
         0x1b8,0x1b9,0x1b9,0x1ba,0x1bb,0x1bb,0x1bc,0x1bd,  
         0x1bd,0x1be,0x1bf,0x1bf,0x1c0,0x1c1,0x1c1,0x1c2,  
         0x1c3,0x1c3,0x1c4,0x1c5,0x1c5,0x1c6,0x1c7,0x1c7,  
         0x1c8,0x1c9,0x1c9,0x1ca,0x1cb,0x1cb,0x1cc,0x1cd,  
         0x1cd,0x1ce,0x1cf,0x1cf,0x1d0,0x1d1,0x1d1,0x1d2,  
         0x1d3,0x1d3,0x1d4,0x1d5,0x1d5,0x1d6,0x1d7,0x1d7,  
         0x1d8,0x1d9,0x1d9,0x1da,0x1db,0x1db,0x1dc,0x1dd,  
         0x1dd,0x1de,0x1df,0x1df,0x1e0,0x1e1,0x1e1,0x1e2,  
         0x1e3,0x1e4,0x1e4,0x1e5,0x1e6,0x1e6,0x1e7,0x1e8,  
         0x1e8,0x1e9,0x1ea,0x1ea,0x1eb,0x1ec,0x1ec,0x1ed,  
         0x1ee,0x1ee,0x1ef,0x1f0,0x1f0,0x1f1,0x1f2,0x1f3,  
         0x1f3,0x1f4,0x1f5,0x1f5,0x1f6,0x1f7,0x1f7,0x1f8,  
         0x1f9,0x1f9,0x1fa,0x1fb,0x1fb,0x1fc,0x1fd,0x1fe,  
         0x1fe,0x1ff,0x200,0x200,0x201,0x202,0x202,0x203,  
         0x204,0x205,0x205,0x206,0x207,0x207,0x208,0x209,  
         0x209,0x20a,0x20b,0x20b,0x20c,0x20d,0x20e,0x20e,  
         0x20f,0x210,0x210,0x211,0x212,0x212,0x213,0x214,  
         0x215,0x215,0x216,0x217,0x217,0x218,0x219,0x21a,  
         0x21a,0x21b,0x21c,0x21c,0x21d,0x21e,0x21e,0x21f,  
         0x220,0x221,0x221,0x222,0x223,0x223,0x224,0x225,  
         0x226,0x226,0x227,0x228,0x228,0x229,0x22a,0x22b,  
         0x22b,0x22c,0x22d,0x22d,0x22e,0x22f,0x230,0x230,  
         0x231,0x232,0x232,0x233,0x234,0x235,0x235,0x236,  
         0x237,0x237,0x238,0x239,0x23a,0x23a,0x23b,0x23c,  
         0x23c,0x23d,0x23e,0x23f,0x23f,0x240,0x241,0x241,  
         0x242,0x243,0x244,0x244,0x245,0x246,0x247,0x247,  
         0x248,0x249,0x249,0x24a,0x24b,0x24c,0x24c,0x24d,  
         0x24e,0x24f,0x24f,0x250,0x251,0x251,0x252,0x253,  
         0x254,0x254,0x255,0x256,0x257,0x257,0x258,0x259,  
         0x259,0x25a,0x25b,0x25c,0x25c,0x25d,0x25e,0x25f,  
         0x25f,0x260,0x261,0x262,0x262,0x263,0x264,0x265,  
         0x265,0x266,0x267,0x267,0x268,0x269,0x26a,0x26a,  
         0x26b,0x26c,0x26d,0x26d,0x26e,0x26f,0x270,0x270,  
         0x271,0x272,0x273,0x273,0x274,0x275,0x276,0x276,  
         0x277,0x278,0x279,0x279,0x27a,0x27b,0x27c,0x27c,  
         0x27d,0x27e,0x27f,0x27f,0x280,0x281,0x282,0x282,  
         0x283,0x284,0x285,0x285,0x286,0x287,0x288,0x288,  
         0x289,0x28a,0x28b,0x28b,0x28c,0x28d,0x28e,0x28e,  
         0x28f,0x290,0x291,0x291,0x292,0x293,0x294,0x294,  
         0x295,0x296,0x297,0x298,0x298,0x299,0x29a,0x29b,  
         0x29b,0x29c,0x29d,0x29e,0x29e,0x29f,0x2a0,0x2a1,  
         0x2a1,0x2a2,0x2a3,0x2a4,0x2a5,0x2a5,0x2a6,0x2a7,  
         0x2a8,0x2a8,0x2a9,0x2aa,0x2ab,0x2ab,0x2ac,0x2ad,  
         0x2ae,0x2af,0x2af,0x2b0,0x2b1,0x2b2,0x2b2,0x2b3,  
         0x2b4,0x2b5,0x2b5,0x2b6,0x2b7,0x2b8,0x2b9,0x2b9,  
         0x2ba,0x2bb,0x2bc,0x2bc,0x2bd,0x2be,0x2bf,0x2c0,  
         0x2c0,0x2c1,0x2c2,0x2c3,0x2c4,0x2c4,0x2c5,0x2c6,  
         0x2c7,0x2c7,0x2c8,0x2c9,0x2ca,0x2cb,0x2cb,0x2cc,  
         0x2cd,0x2ce,0x2ce,0x2cf,0x2d0,0x2d1,0x2d2,0x2d2,  
         0x2d3,0x2d4,0x2d5,0x2d6,0x2d6,0x2d7,0x2d8,0x2d9,  
         0x2da,0x2da,0x2db,0x2dc,0x2dd,0x2dd,0x2de,0x2df,  
         0x2e0,0x2e1,0x2e1,0x2e2,0x2e3,0x2e4,0x2e5,0x2e5,  
         0x2e6,0x2e7,0x2e8,0x2e9,0x2e9,0x2ea,0x2eb,0x2ec,  
         0x2ed,0x2ed,0x2ee,0x2ef,0x2f0,0x2f1,0x2f1,0x2f2,  
         0x2f3,0x2f4,0x2f5,0x2f5,0x2f6,0x2f7,0x2f8,0x2f9,  
         0x2f9,0x2fa,0x2fb,0x2fc,0x2fd,0x2fd,0x2fe,0x2ff,  
         0x300,0x301,0x302,0x302,0x303,0x304,0x305,0x306,  
         0x306,0x307,0x308,0x309,0x30a,0x30a,0x30b,0x30c,  
         0x30d,0x30e,0x30f,0x30f,0x310,0x311,0x312,0x313,  
         0x313,0x314,0x315,0x316,0x317,0x318,0x318,0x319,  
         0x31a,0x31b,0x31c,0x31c,0x31d,0x31e,0x31f,0x320,  
         0x321,0x321,0x322,0x323,0x324,0x325,0x326,0x326,  
         0x327,0x328,0x329,0x32a,0x32a,0x32b,0x32c,0x32d,  
         0x32e,0x32f,0x32f,0x330,0x331,0x332,0x333,0x334,  
         0x334,0x335,0x336,0x337,0x338,0x339,0x339,0x33a,  
         0x33b,0x33c,0x33d,0x33e,0x33e,0x33f,0x340,0x341,  
         0x342,0x343,0x343,0x344,0x345,0x346,0x347,0x348,  
         0x349,0x349,0x34a,0x34b,0x34c,0x34d,0x34e,0x34e,  
         0x34f,0x350,0x351,0x352,0x353,0x353,0x354,0x355,  
         0x356,0x357,0x358,0x359,0x359,0x35a,0x35b,0x35c,  
         0x35d,0x35e,0x35f,0x35f,0x360,0x361,0x362,0x363,  
         0x364,0x364,0x365,0x366,0x367,0x368,0x369,0x36a,  
         0x36a,0x36b,0x36c,0x36d,0x36e,0x36f,0x370,0x370,  
         0x371,0x372,0x373,0x374,0x375,0x376,0x377,0x377,  
         0x378,0x379,0x37a,0x37b,0x37c,0x37d,0x37d,0x37e,  
         0x37f,0x380,0x381,0x382,0x383,0x383,0x384,0x385,  
         0x386,0x387,0x388,0x389,0x38a,0x38a,0x38b,0x38c,  
         0x38d,0x38e,0x38f,0x390,0x391,0x391,0x392,0x393,  
         0x394,0x395,0x396,0x397,0x398,0x398,0x399,0x39a,  
         0x39b,0x39c,0x39d,0x39e,0x39f,0x39f,0x3a0,0x3a1,  
         0x3a2,0x3a3,0x3a4,0x3a5,0x3a6,0x3a7,0x3a7,0x3a8,  
         0x3a9,0x3aa,0x3ab,0x3ac,0x3ad,0x3ae,0x3ae,0x3af,  
         0x3b0,0x3b1,0x3b2,0x3b3,0x3b4,0x3b5,0x3b6,0x3b6,  
         0x3b7,0x3b8,0x3b9,0x3ba,0x3bb,0x3bc,0x3bd,0x3be,  
         0x3bf,0x3bf,0x3c0,0x3c1,0x3c2,0x3c3,0x3c4,0x3c5,  
         0x3c6,0x3c7,0x3c7,0x3c8,0x3c9,0x3ca,0x3cb,0x3cc,  
         0x3cd,0x3ce,0x3cf,0x3d0,0x3d1,0x3d1,0x3d2,0x3d3,  
         0x3d4,0x3d5,0x3d6,0x3d7,0x3d8,0x3d9,0x3da,0x3da,  
         0x3db,0x3dc,0x3dd,0x3de,0x3df,0x3e0,0x3e1,0x3e2,  
         0x3e3,0x3e4,0x3e4,0x3e5,0x3e6,0x3e7,0x3e8,0x3e9,  
         0x3ea,0x3eb,0x3ec,0x3ed,0x3ee,0x3ef,0x3ef,0x3f0,  
         0x3f1,0x3f2,0x3f3,0x3f4,0x3f5,0x3f6,0x3f7,0x3f8,  
         0x3f9,0x3fa,0x3fa,0x3fb,0x3fc,0x3fd,0x3fe,0x3ff  
 };  
   
 /*  
  * Attenuation according to GM recommendations, in -0.375 dB units.  
  * table[v] = 40 * log(v / 127) / -0.375  
  */  
 static unsigned char snd_opl4_volume_table[128] = {  
         255,224,192,173,160,150,141,134,  
         128,122,117,113,109,105,102, 99,  
          96, 93, 90, 88, 85, 83, 81, 79,  
          77, 75, 73, 71, 70, 68, 67, 65,  
          64, 62, 61, 59, 58, 57, 56, 54,  
          53, 52, 51, 50, 49, 48, 47, 46,  
          45, 44, 43, 42, 41, 40, 39, 39,  
          38, 37, 36, 35, 34, 34, 33, 32,  
          31, 31, 30, 29, 29, 28, 27, 27,  
          26, 25, 25, 24, 24, 23, 22, 22,  
          21, 21, 20, 19, 19, 18, 18, 17,  
          17, 16, 16, 15, 15, 14, 14, 13,  
          13, 12, 12, 11, 11, 10, 10,  9,  
           9,  9,  8,  8,  7,  7,  6,  6,  
           6,  5,  5,  4,  4,  4,  3,  3,  
           2,  2,  2,  1,  1,  0,  0,  0  
 };  
   
 static void snd_opl4_write_mask(opl4_t *opl4, u8 reg, u8 mask, u8 value)  
 {  
         snd_opl4_write(opl4, reg, ((snd_opl4_read(opl4, reg)) & ~mask) | (value & mask));  
 }  
   
 /*  
  * Initializes all voices.  
  */  
 void snd_opl4_synth_reset(opl4_t *opl4)  
 {  
         int i;  
   
         for (i = 0; i < OPL4_MAX_VOICES; i++)  
                 snd_opl4_write(opl4, OPL4_REG_MISC + i, OPL4_DAMP_BIT);  
   
         spin_lock_init(&opl4->voices_lock);  
         INIT_LIST_HEAD(&opl4->off_voices);  
         INIT_LIST_HEAD(&opl4->on_voices);  
         memset(opl4->voices, 0, sizeof(opl4->voices));  
         for (i = 0; i < OPL4_MAX_VOICES; i++) {  
                 opl4->voices[i].number = i;  
                 list_add_tail(&opl4->voices[i].list, &opl4->off_voices);  
         }  
   
         snd_midi_channel_set_clear(opl4->chset);  
 }  
   
 /*  
  * Shuts down all voices.  
  */  
 void snd_opl4_synth_shutdown(opl4_t *opl4)  
 {  
         int i;  
   
         for (i = 0; i < OPL4_MAX_VOICES; i++)  
                 snd_opl4_write_mask(opl4, OPL4_REG_MISC + i, OPL4_KEY_ON_BIT, 0);  
 }  
   
 /*  
  * Executes the callback for all voices playing the specified note.  
  */  
 static void snd_opl4_do_for_note(opl4_t *opl4, int note, snd_midi_channel_t *chan,  
                                  void (*func)(opl4_t *opl4, opl4_voice_t *voice))  
 {  
         int i;  
         unsigned long flags;  
         opl4_voice_t *voice;  
   
         spin_lock_irqsave(&opl4->voices_lock, flags);  
         for (i = 0; i < OPL4_MAX_VOICES; i++) {  
                 voice = &opl4->voices[i];  
                 if (voice->chan == chan && voice->note == note) {  
                         func(opl4, voice);  
                 }  
         }  
         spin_unlock_irqrestore(&opl4->voices_lock, flags);  
 }  
   
 /*  
  * Executes the callback for all voices of to the specified channel.  
  */  
 static void snd_opl4_do_for_channel(opl4_t *opl4, snd_midi_channel_t *chan,  
                                     void (*func)(opl4_t *opl4, opl4_voice_t *voice))  
 {  
         int i;  
         unsigned long flags;  
         opl4_voice_t *voice;  
   
         spin_lock_irqsave(&opl4->voices_lock, flags);  
         for (i = 0; i < OPL4_MAX_VOICES; i++) {  
                 voice = &opl4->voices[i];  
                 if (voice->chan == chan) {  
                         func(opl4, voice);  
                 }  
         }  
         spin_unlock_irqrestore(&opl4->voices_lock, flags);  
 }  
   
 /*  
  * Executes the callback for all active voices.  
  */  
 static void snd_opl4_do_for_all(opl4_t *opl4,  
                                 void (*func)(opl4_t *opl4, opl4_voice_t *voice))  
 {  
         int i;  
         unsigned long flags;  
         opl4_voice_t *voice;  
   
         spin_lock_irqsave(&opl4->voices_lock, flags);  
         for (i = 0; i < OPL4_MAX_VOICES; i++) {  
                 voice = &opl4->voices[i];  
                 if (voice->chan)  
                         func(opl4, voice);  
         }  
         spin_unlock_irqrestore(&opl4->voices_lock, flags);  
 }  
   
 static void snd_opl4_update_volume(opl4_t *opl4, opl4_voice_t *voice)  
 {  
         int att;  
   
         att = voice->sound->tone_attenuate;  
         att += snd_opl4_volume_table[opl4->chset->gs_master_volume & 0x7f];  
         att += snd_opl4_volume_table[voice->chan->gm_volume & 0x7f];  
         att += snd_opl4_volume_table[voice->chan->gm_expression & 0x7f];  
         att += snd_opl4_volume_table[voice->velocity];  
         att = 0x7f - (0x7f - att) * (voice->sound->volume_factor) / 0xfe - volume_boost;  
         if (att < 0)  
                 att = 0;  
         else if (att > 0x7e)  
                 att = 0x7e;  
         snd_opl4_write(opl4, OPL4_REG_LEVEL + voice->number, att << 1);  
 }  
   
 static void snd_opl4_update_pan(opl4_t *opl4, opl4_voice_t *voice)  
 {  
         int pan = voice->sound->panpot;  
   
         if (!voice->chan->drum_channel)  
                 pan += (voice->chan->control[MIDI_CTL_MSB_PAN] - 0x40) >> 3;  
         if (pan < -7)  
                 pan = -7;  
         else if (pan > 7)  
                 pan = 7;  
         voice->reg_misc = (voice->reg_misc & ~OPL4_PAN_POT_MASK)  
                 | (pan & OPL4_PAN_POT_MASK);  
         snd_opl4_write(opl4, OPL4_REG_MISC + voice->number, voice->reg_misc);  
 }  
   
 static void snd_opl4_update_vibrato_depth(opl4_t *opl4, opl4_voice_t *voice)  
 {  
         int depth;  
   
         if (voice->chan->drum_channel)  
                 return;  
         depth = (7 - voice->sound->vibrato)  
                 * (voice->chan->control[MIDI_CTL_VIBRATO_DEPTH] & 0x7f);  
         depth = (depth >> 7) + voice->sound->vibrato;  
         snd_opl4_write_mask(opl4, OPL4_REG_LFO_VIBRATO + voice->number,  
                             OPL4_VIBRATO_DEPTH_MASK, depth);  
 }  
   
 static void snd_opl4_update_pitch(opl4_t *opl4, opl4_voice_t *voice)  
 {  
         snd_midi_channel_t *chan = voice->chan;  
         int note, pitch, octave;  
   
         note = chan->drum_channel ? 60 : voice->note;  
         /*  
          * pitch is in 100/128 cents, so 0x80 is one semitone and  
          * 0x600 is one octave.  
          */  
         pitch = ((note - 60) << 7) * voice->sound->key_scaling / 100 + (60 << 7);  
         pitch += voice->sound->pitch_offset;  
         if (!chan->drum_channel)  
                 pitch += chan->gm_rpn_coarse_tuning;  
         pitch += chan->gm_rpn_fine_tuning >> 7;  
         pitch += chan->midi_pitchbend * chan->gm_rpn_pitch_bend_range / 0x2000;  
         if (pitch < 0)  
                 pitch = 0;  
         else if (pitch >= 0x6000)  
                 pitch = 0x5fff;  
         octave = pitch / 0x600 - 8;  
         pitch = snd_opl4_pitch_map[pitch % 0x600];  
   
         snd_opl4_write(opl4, OPL4_REG_OCTAVE + voice->number,  
                        (octave << 4) | ((pitch >> 7) & OPL4_F_NUMBER_HIGH_MASK));  
         voice->reg_f_number = (voice->reg_f_number & OPL4_TONE_NUMBER_BIT8)  
                 | ((pitch << 1) & OPL4_F_NUMBER_LOW_MASK);  
         snd_opl4_write(opl4, OPL4_REG_F_NUMBER + voice->number, voice->reg_f_number);  
 }  
   
 static void snd_opl4_update_tone_parameters(opl4_t *opl4, opl4_voice_t *voice)  
 {  
         snd_opl4_write(opl4, OPL4_REG_LFO_VIBRATO + voice->number,  
                        voice->sound->reg_lfo_vibrato);  
         snd_opl4_write(opl4, OPL4_REG_ATTACK_DECAY1 + voice->number,  
                        voice->sound->reg_attack_decay1);  
         snd_opl4_write(opl4, OPL4_REG_LEVEL_DECAY2 + voice->number,  
                        voice->sound->reg_level_decay2);  
         snd_opl4_write(opl4, OPL4_REG_RELEASE_CORRECTION + voice->number,  
                        voice->sound->reg_release_correction);  
         snd_opl4_write(opl4, OPL4_REG_TREMOLO + voice->number,  
                        voice->sound->reg_tremolo);  
 }  
   
 /* allocate one voice */  
 static opl4_voice_t *snd_opl4_get_voice(opl4_t *opl4)  
 {  
         /* first, try to get the oldest key-off voice */  
         if (!list_empty(&opl4->off_voices))  
                 return list_entry(opl4->off_voices.next, opl4_voice_t, list);  
         /* then get the oldest key-on voice */  
         snd_assert(!list_empty(&opl4->on_voices), );  
         return list_entry(opl4->on_voices.next, opl4_voice_t, list);  
 }  
   
 static void snd_opl4_wait_for_wave_headers(opl4_t *opl4)  
 {  
         int timeout = 200;  
   
         while ((inb(opl4->fm_port) & OPL4_STATUS_LOAD) && --timeout > 0)  
                 udelay(10);  
 }  
   
 void snd_opl4_note_on(void *private_data, int note, int vel, snd_midi_channel_t *chan)  
 {  
         opl4_t *opl4 = snd_magic_cast(opl4_t, private_data, return);  
         const opl4_region_ptr_t *regions;  
         opl4_voice_t *voice[2];  
         const opl4_sound_t *sound[2];  
         int voices = 0, i;  
         unsigned long flags;  
   
         /* determine the number of voices and voice parameters */  
         i = chan->drum_channel ? 0x80 : (chan->midi_program & 0x7f);  
         regions = &snd_yrw801_regions[i];  
         for (i = 0; i < regions->count; i++) {  
                 if (note >= regions->regions[i].key_min &&  
                     note <= regions->regions[i].key_max) {  
                         sound[voices] = &regions->regions[i].sound;  
                         if (++voices >= 2)  
                                 break;  
                 }  
         }  
   
         /* allocate and initialize the needed voices */  
         spin_lock_irqsave(&opl4->voices_lock, flags);  
         for (i = 0; i < voices; i++) {  
                 voice[i] = snd_opl4_get_voice(opl4);  
                 list_del(&voice[i]->list);  
                 list_add_tail(&voice[i]->list, &opl4->on_voices);  
                 voice[i]->chan = chan;  
                 voice[i]->note = note;  
                 voice[i]->velocity = vel & 0x7f;  
                 voice[i]->sound = sound[i];  
         }  
         spin_unlock_irqrestore(&opl4->voices_lock, flags);  
   
         /* set tone number (triggers header loading) */  
         for (i = 0; i < voices; i++) {  
                 voice[i]->reg_f_number =  
                         (sound[i]->tone >> 8) & OPL4_TONE_NUMBER_BIT8;  
                 snd_opl4_write(opl4, OPL4_REG_F_NUMBER + voice[i]->number,  
                                voice[i]->reg_f_number);  
                 snd_opl4_write(opl4, OPL4_REG_TONE_NUMBER + voice[i]->number,  
                                sound[i]->tone & 0xff);  
         }  
   
         /* set parameters which can be set while loading */  
         for (i = 0; i < voices; i++) {  
                 voice[i]->reg_misc = OPL4_LFO_RESET_BIT;  
                 snd_opl4_update_pan(opl4, voice[i]);  
                 snd_opl4_update_pitch(opl4, voice[i]);  
                 snd_opl4_update_volume(opl4, voice[i]);  
         }  
   
         /* wait for completion of loading */  
         snd_opl4_wait_for_wave_headers(opl4);  
   
         /* set remaining parameters */  
         for (i = 0; i < voices; i++) {  
                 snd_opl4_update_tone_parameters(opl4, voice[i]);  
                 snd_opl4_update_vibrato_depth(opl4, voice[i]);  
         }  
   
         /* finally, switch on all voices */  
         for (i = 0; i < voices; i++) {  
                 voice[i]->reg_misc =  
                         (voice[i]->reg_misc & 0x1f) | OPL4_KEY_ON_BIT;  
                 snd_opl4_write(opl4, OPL4_REG_MISC + voice[i]->number,  
                                voice[i]->reg_misc);  
         }  
 }  
   
 static void snd_opl4_voice_off(opl4_t *opl4, opl4_voice_t *voice)  
 {  
         list_del(&voice->list);  
         list_add_tail(&voice->list, &opl4->off_voices);  
   
         voice->reg_misc &= ~OPL4_KEY_ON_BIT;  
         snd_opl4_write(opl4, OPL4_REG_MISC + voice->number, voice->reg_misc);  
 }  
   
 void snd_opl4_note_off(void *private_data, int note, int vel, snd_midi_channel_t *chan)  
 {  
         opl4_t *opl4 = snd_magic_cast(opl4_t, private_data, return);  
   
         snd_opl4_do_for_note(opl4, note, chan, snd_opl4_voice_off);  
 }  
   
 static void snd_opl4_terminate_voice(opl4_t *opl4, opl4_voice_t *voice)  
 {  
         list_del(&voice->list);  
         list_add_tail(&voice->list, &opl4->off_voices);  
   
         voice->reg_misc = (voice->reg_misc & ~OPL4_KEY_ON_BIT) | OPL4_DAMP_BIT;  
         snd_opl4_write(opl4, OPL4_REG_MISC + voice->number, voice->reg_misc);  
 }  
   
 void snd_opl4_terminate_note(void *private_data, int note, snd_midi_channel_t *chan)  
 {  
         opl4_t *opl4 = snd_magic_cast(opl4_t, private_data, return);  
   
         snd_opl4_do_for_note(opl4, note, chan, snd_opl4_terminate_voice);  
 }  
   
 void snd_opl4_control(void *private_data, int type, snd_midi_channel_t *chan)  
 {  
         opl4_t *opl4 = snd_magic_cast(opl4_t, private_data, return);  
   
         switch (type) {  
         case MIDI_CTL_MSB_MODWHEEL:  
                 chan->control[MIDI_CTL_VIBRATO_DEPTH] = chan->control[MIDI_CTL_MSB_MODWHEEL];  
                 snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_vibrato_depth);  
                 break;  
         case MIDI_CTL_MSB_MAIN_VOLUME:  
                 snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_volume);  
                 break;  
         case MIDI_CTL_MSB_PAN:  
                 snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_pan);  
                 break;  
         case MIDI_CTL_MSB_EXPRESSION:  
                 snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_volume);  
                 break;  
         case MIDI_CTL_VIBRATO_RATE:  
                 /* not yet supported */  
                 break;  
         case MIDI_CTL_VIBRATO_DEPTH:  
                 snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_vibrato_depth);  
                 break;  
         case MIDI_CTL_VIBRATO_DELAY:  
                 /* not yet supported */  
                 break;  
         case MIDI_CTL_E1_REVERB_DEPTH:  
                 /*  
                  * Each OPL4 voice has a bit called "Pseudo-Reverb", but  
                  * IMHO _not_ using it enhances the listening experience.  
                  */  
                 break;  
         case MIDI_CTL_PITCHBEND:  
                 snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_pitch);  
                 break;  
         }  
 }  
   
 void snd_opl4_sysex(void *private_data, unsigned char *buf, int len,  
                     int parsed, snd_midi_channel_set_t *chset)  
 {  
         opl4_t *opl4 = snd_magic_cast(opl4_t, private_data, return);  
   
         if (parsed == SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME)  
                 snd_opl4_do_for_all(opl4, snd_opl4_update_volume);  
 }  

Legend:
Removed from v.1.1  
changed lines
  Added in v.1.2

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