opl4_synth.c 23 KB

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  1. /*
  2. * OPL4 MIDI synthesizer functions
  3. *
  4. * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
  5. * All rights reserved.
  6. *
  7. * Redistribution and use in source and binary forms, with or without
  8. * modification, are permitted provided that the following conditions
  9. * are met:
  10. * 1. Redistributions of source code must retain the above copyright
  11. * notice, this list of conditions, and the following disclaimer,
  12. * without modification.
  13. * 2. The name of the author may not be used to endorse or promote products
  14. * derived from this software without specific prior written permission.
  15. *
  16. * Alternatively, this software may be distributed and/or modified under the
  17. * terms of the GNU General Public License as published by the Free Software
  18. * Foundation; either version 2 of the License, or (at your option) any later
  19. * version.
  20. *
  21. * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  22. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24. * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  25. * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31. * SUCH DAMAGE.
  32. */
  33. #include "opl4_local.h"
  34. #include <linux/delay.h>
  35. #include <asm/io.h>
  36. #include <sound/asoundef.h>
  37. /* GM2 controllers */
  38. #ifndef MIDI_CTL_RELEASE_TIME
  39. #define MIDI_CTL_RELEASE_TIME 0x48
  40. #define MIDI_CTL_ATTACK_TIME 0x49
  41. #define MIDI_CTL_DECAY_TIME 0x4b
  42. #define MIDI_CTL_VIBRATO_RATE 0x4c
  43. #define MIDI_CTL_VIBRATO_DEPTH 0x4d
  44. #define MIDI_CTL_VIBRATO_DELAY 0x4e
  45. #endif
  46. /*
  47. * This table maps 100/128 cents to F_NUMBER.
  48. */
  49. static const s16 snd_opl4_pitch_map[0x600] = {
  50. 0x000,0x000,0x001,0x001,0x002,0x002,0x003,0x003,
  51. 0x004,0x004,0x005,0x005,0x006,0x006,0x006,0x007,
  52. 0x007,0x008,0x008,0x009,0x009,0x00a,0x00a,0x00b,
  53. 0x00b,0x00c,0x00c,0x00d,0x00d,0x00d,0x00e,0x00e,
  54. 0x00f,0x00f,0x010,0x010,0x011,0x011,0x012,0x012,
  55. 0x013,0x013,0x014,0x014,0x015,0x015,0x015,0x016,
  56. 0x016,0x017,0x017,0x018,0x018,0x019,0x019,0x01a,
  57. 0x01a,0x01b,0x01b,0x01c,0x01c,0x01d,0x01d,0x01e,
  58. 0x01e,0x01e,0x01f,0x01f,0x020,0x020,0x021,0x021,
  59. 0x022,0x022,0x023,0x023,0x024,0x024,0x025,0x025,
  60. 0x026,0x026,0x027,0x027,0x028,0x028,0x029,0x029,
  61. 0x029,0x02a,0x02a,0x02b,0x02b,0x02c,0x02c,0x02d,
  62. 0x02d,0x02e,0x02e,0x02f,0x02f,0x030,0x030,0x031,
  63. 0x031,0x032,0x032,0x033,0x033,0x034,0x034,0x035,
  64. 0x035,0x036,0x036,0x037,0x037,0x038,0x038,0x038,
  65. 0x039,0x039,0x03a,0x03a,0x03b,0x03b,0x03c,0x03c,
  66. 0x03d,0x03d,0x03e,0x03e,0x03f,0x03f,0x040,0x040,
  67. 0x041,0x041,0x042,0x042,0x043,0x043,0x044,0x044,
  68. 0x045,0x045,0x046,0x046,0x047,0x047,0x048,0x048,
  69. 0x049,0x049,0x04a,0x04a,0x04b,0x04b,0x04c,0x04c,
  70. 0x04d,0x04d,0x04e,0x04e,0x04f,0x04f,0x050,0x050,
  71. 0x051,0x051,0x052,0x052,0x053,0x053,0x054,0x054,
  72. 0x055,0x055,0x056,0x056,0x057,0x057,0x058,0x058,
  73. 0x059,0x059,0x05a,0x05a,0x05b,0x05b,0x05c,0x05c,
  74. 0x05d,0x05d,0x05e,0x05e,0x05f,0x05f,0x060,0x060,
  75. 0x061,0x061,0x062,0x062,0x063,0x063,0x064,0x064,
  76. 0x065,0x065,0x066,0x066,0x067,0x067,0x068,0x068,
  77. 0x069,0x069,0x06a,0x06a,0x06b,0x06b,0x06c,0x06c,
  78. 0x06d,0x06d,0x06e,0x06e,0x06f,0x06f,0x070,0x071,
  79. 0x071,0x072,0x072,0x073,0x073,0x074,0x074,0x075,
  80. 0x075,0x076,0x076,0x077,0x077,0x078,0x078,0x079,
  81. 0x079,0x07a,0x07a,0x07b,0x07b,0x07c,0x07c,0x07d,
  82. 0x07d,0x07e,0x07e,0x07f,0x07f,0x080,0x081,0x081,
  83. 0x082,0x082,0x083,0x083,0x084,0x084,0x085,0x085,
  84. 0x086,0x086,0x087,0x087,0x088,0x088,0x089,0x089,
  85. 0x08a,0x08a,0x08b,0x08b,0x08c,0x08d,0x08d,0x08e,
  86. 0x08e,0x08f,0x08f,0x090,0x090,0x091,0x091,0x092,
  87. 0x092,0x093,0x093,0x094,0x094,0x095,0x096,0x096,
  88. 0x097,0x097,0x098,0x098,0x099,0x099,0x09a,0x09a,
  89. 0x09b,0x09b,0x09c,0x09c,0x09d,0x09d,0x09e,0x09f,
  90. 0x09f,0x0a0,0x0a0,0x0a1,0x0a1,0x0a2,0x0a2,0x0a3,
  91. 0x0a3,0x0a4,0x0a4,0x0a5,0x0a6,0x0a6,0x0a7,0x0a7,
  92. 0x0a8,0x0a8,0x0a9,0x0a9,0x0aa,0x0aa,0x0ab,0x0ab,
  93. 0x0ac,0x0ad,0x0ad,0x0ae,0x0ae,0x0af,0x0af,0x0b0,
  94. 0x0b0,0x0b1,0x0b1,0x0b2,0x0b2,0x0b3,0x0b4,0x0b4,
  95. 0x0b5,0x0b5,0x0b6,0x0b6,0x0b7,0x0b7,0x0b8,0x0b8,
  96. 0x0b9,0x0ba,0x0ba,0x0bb,0x0bb,0x0bc,0x0bc,0x0bd,
  97. 0x0bd,0x0be,0x0be,0x0bf,0x0c0,0x0c0,0x0c1,0x0c1,
  98. 0x0c2,0x0c2,0x0c3,0x0c3,0x0c4,0x0c4,0x0c5,0x0c6,
  99. 0x0c6,0x0c7,0x0c7,0x0c8,0x0c8,0x0c9,0x0c9,0x0ca,
  100. 0x0cb,0x0cb,0x0cc,0x0cc,0x0cd,0x0cd,0x0ce,0x0ce,
  101. 0x0cf,0x0d0,0x0d0,0x0d1,0x0d1,0x0d2,0x0d2,0x0d3,
  102. 0x0d3,0x0d4,0x0d5,0x0d5,0x0d6,0x0d6,0x0d7,0x0d7,
  103. 0x0d8,0x0d8,0x0d9,0x0da,0x0da,0x0db,0x0db,0x0dc,
  104. 0x0dc,0x0dd,0x0de,0x0de,0x0df,0x0df,0x0e0,0x0e0,
  105. 0x0e1,0x0e1,0x0e2,0x0e3,0x0e3,0x0e4,0x0e4,0x0e5,
  106. 0x0e5,0x0e6,0x0e7,0x0e7,0x0e8,0x0e8,0x0e9,0x0e9,
  107. 0x0ea,0x0eb,0x0eb,0x0ec,0x0ec,0x0ed,0x0ed,0x0ee,
  108. 0x0ef,0x0ef,0x0f0,0x0f0,0x0f1,0x0f1,0x0f2,0x0f3,
  109. 0x0f3,0x0f4,0x0f4,0x0f5,0x0f5,0x0f6,0x0f7,0x0f7,
  110. 0x0f8,0x0f8,0x0f9,0x0f9,0x0fa,0x0fb,0x0fb,0x0fc,
  111. 0x0fc,0x0fd,0x0fd,0x0fe,0x0ff,0x0ff,0x100,0x100,
  112. 0x101,0x101,0x102,0x103,0x103,0x104,0x104,0x105,
  113. 0x106,0x106,0x107,0x107,0x108,0x108,0x109,0x10a,
  114. 0x10a,0x10b,0x10b,0x10c,0x10c,0x10d,0x10e,0x10e,
  115. 0x10f,0x10f,0x110,0x111,0x111,0x112,0x112,0x113,
  116. 0x114,0x114,0x115,0x115,0x116,0x116,0x117,0x118,
  117. 0x118,0x119,0x119,0x11a,0x11b,0x11b,0x11c,0x11c,
  118. 0x11d,0x11e,0x11e,0x11f,0x11f,0x120,0x120,0x121,
  119. 0x122,0x122,0x123,0x123,0x124,0x125,0x125,0x126,
  120. 0x126,0x127,0x128,0x128,0x129,0x129,0x12a,0x12b,
  121. 0x12b,0x12c,0x12c,0x12d,0x12e,0x12e,0x12f,0x12f,
  122. 0x130,0x131,0x131,0x132,0x132,0x133,0x134,0x134,
  123. 0x135,0x135,0x136,0x137,0x137,0x138,0x138,0x139,
  124. 0x13a,0x13a,0x13b,0x13b,0x13c,0x13d,0x13d,0x13e,
  125. 0x13e,0x13f,0x140,0x140,0x141,0x141,0x142,0x143,
  126. 0x143,0x144,0x144,0x145,0x146,0x146,0x147,0x148,
  127. 0x148,0x149,0x149,0x14a,0x14b,0x14b,0x14c,0x14c,
  128. 0x14d,0x14e,0x14e,0x14f,0x14f,0x150,0x151,0x151,
  129. 0x152,0x153,0x153,0x154,0x154,0x155,0x156,0x156,
  130. 0x157,0x157,0x158,0x159,0x159,0x15a,0x15b,0x15b,
  131. 0x15c,0x15c,0x15d,0x15e,0x15e,0x15f,0x160,0x160,
  132. 0x161,0x161,0x162,0x163,0x163,0x164,0x165,0x165,
  133. 0x166,0x166,0x167,0x168,0x168,0x169,0x16a,0x16a,
  134. 0x16b,0x16b,0x16c,0x16d,0x16d,0x16e,0x16f,0x16f,
  135. 0x170,0x170,0x171,0x172,0x172,0x173,0x174,0x174,
  136. 0x175,0x175,0x176,0x177,0x177,0x178,0x179,0x179,
  137. 0x17a,0x17a,0x17b,0x17c,0x17c,0x17d,0x17e,0x17e,
  138. 0x17f,0x180,0x180,0x181,0x181,0x182,0x183,0x183,
  139. 0x184,0x185,0x185,0x186,0x187,0x187,0x188,0x188,
  140. 0x189,0x18a,0x18a,0x18b,0x18c,0x18c,0x18d,0x18e,
  141. 0x18e,0x18f,0x190,0x190,0x191,0x191,0x192,0x193,
  142. 0x193,0x194,0x195,0x195,0x196,0x197,0x197,0x198,
  143. 0x199,0x199,0x19a,0x19a,0x19b,0x19c,0x19c,0x19d,
  144. 0x19e,0x19e,0x19f,0x1a0,0x1a0,0x1a1,0x1a2,0x1a2,
  145. 0x1a3,0x1a4,0x1a4,0x1a5,0x1a6,0x1a6,0x1a7,0x1a8,
  146. 0x1a8,0x1a9,0x1a9,0x1aa,0x1ab,0x1ab,0x1ac,0x1ad,
  147. 0x1ad,0x1ae,0x1af,0x1af,0x1b0,0x1b1,0x1b1,0x1b2,
  148. 0x1b3,0x1b3,0x1b4,0x1b5,0x1b5,0x1b6,0x1b7,0x1b7,
  149. 0x1b8,0x1b9,0x1b9,0x1ba,0x1bb,0x1bb,0x1bc,0x1bd,
  150. 0x1bd,0x1be,0x1bf,0x1bf,0x1c0,0x1c1,0x1c1,0x1c2,
  151. 0x1c3,0x1c3,0x1c4,0x1c5,0x1c5,0x1c6,0x1c7,0x1c7,
  152. 0x1c8,0x1c9,0x1c9,0x1ca,0x1cb,0x1cb,0x1cc,0x1cd,
  153. 0x1cd,0x1ce,0x1cf,0x1cf,0x1d0,0x1d1,0x1d1,0x1d2,
  154. 0x1d3,0x1d3,0x1d4,0x1d5,0x1d5,0x1d6,0x1d7,0x1d7,
  155. 0x1d8,0x1d9,0x1d9,0x1da,0x1db,0x1db,0x1dc,0x1dd,
  156. 0x1dd,0x1de,0x1df,0x1df,0x1e0,0x1e1,0x1e1,0x1e2,
  157. 0x1e3,0x1e4,0x1e4,0x1e5,0x1e6,0x1e6,0x1e7,0x1e8,
  158. 0x1e8,0x1e9,0x1ea,0x1ea,0x1eb,0x1ec,0x1ec,0x1ed,
  159. 0x1ee,0x1ee,0x1ef,0x1f0,0x1f0,0x1f1,0x1f2,0x1f3,
  160. 0x1f3,0x1f4,0x1f5,0x1f5,0x1f6,0x1f7,0x1f7,0x1f8,
  161. 0x1f9,0x1f9,0x1fa,0x1fb,0x1fb,0x1fc,0x1fd,0x1fe,
  162. 0x1fe,0x1ff,0x200,0x200,0x201,0x202,0x202,0x203,
  163. 0x204,0x205,0x205,0x206,0x207,0x207,0x208,0x209,
  164. 0x209,0x20a,0x20b,0x20b,0x20c,0x20d,0x20e,0x20e,
  165. 0x20f,0x210,0x210,0x211,0x212,0x212,0x213,0x214,
  166. 0x215,0x215,0x216,0x217,0x217,0x218,0x219,0x21a,
  167. 0x21a,0x21b,0x21c,0x21c,0x21d,0x21e,0x21e,0x21f,
  168. 0x220,0x221,0x221,0x222,0x223,0x223,0x224,0x225,
  169. 0x226,0x226,0x227,0x228,0x228,0x229,0x22a,0x22b,
  170. 0x22b,0x22c,0x22d,0x22d,0x22e,0x22f,0x230,0x230,
  171. 0x231,0x232,0x232,0x233,0x234,0x235,0x235,0x236,
  172. 0x237,0x237,0x238,0x239,0x23a,0x23a,0x23b,0x23c,
  173. 0x23c,0x23d,0x23e,0x23f,0x23f,0x240,0x241,0x241,
  174. 0x242,0x243,0x244,0x244,0x245,0x246,0x247,0x247,
  175. 0x248,0x249,0x249,0x24a,0x24b,0x24c,0x24c,0x24d,
  176. 0x24e,0x24f,0x24f,0x250,0x251,0x251,0x252,0x253,
  177. 0x254,0x254,0x255,0x256,0x257,0x257,0x258,0x259,
  178. 0x259,0x25a,0x25b,0x25c,0x25c,0x25d,0x25e,0x25f,
  179. 0x25f,0x260,0x261,0x262,0x262,0x263,0x264,0x265,
  180. 0x265,0x266,0x267,0x267,0x268,0x269,0x26a,0x26a,
  181. 0x26b,0x26c,0x26d,0x26d,0x26e,0x26f,0x270,0x270,
  182. 0x271,0x272,0x273,0x273,0x274,0x275,0x276,0x276,
  183. 0x277,0x278,0x279,0x279,0x27a,0x27b,0x27c,0x27c,
  184. 0x27d,0x27e,0x27f,0x27f,0x280,0x281,0x282,0x282,
  185. 0x283,0x284,0x285,0x285,0x286,0x287,0x288,0x288,
  186. 0x289,0x28a,0x28b,0x28b,0x28c,0x28d,0x28e,0x28e,
  187. 0x28f,0x290,0x291,0x291,0x292,0x293,0x294,0x294,
  188. 0x295,0x296,0x297,0x298,0x298,0x299,0x29a,0x29b,
  189. 0x29b,0x29c,0x29d,0x29e,0x29e,0x29f,0x2a0,0x2a1,
  190. 0x2a1,0x2a2,0x2a3,0x2a4,0x2a5,0x2a5,0x2a6,0x2a7,
  191. 0x2a8,0x2a8,0x2a9,0x2aa,0x2ab,0x2ab,0x2ac,0x2ad,
  192. 0x2ae,0x2af,0x2af,0x2b0,0x2b1,0x2b2,0x2b2,0x2b3,
  193. 0x2b4,0x2b5,0x2b5,0x2b6,0x2b7,0x2b8,0x2b9,0x2b9,
  194. 0x2ba,0x2bb,0x2bc,0x2bc,0x2bd,0x2be,0x2bf,0x2c0,
  195. 0x2c0,0x2c1,0x2c2,0x2c3,0x2c4,0x2c4,0x2c5,0x2c6,
  196. 0x2c7,0x2c7,0x2c8,0x2c9,0x2ca,0x2cb,0x2cb,0x2cc,
  197. 0x2cd,0x2ce,0x2ce,0x2cf,0x2d0,0x2d1,0x2d2,0x2d2,
  198. 0x2d3,0x2d4,0x2d5,0x2d6,0x2d6,0x2d7,0x2d8,0x2d9,
  199. 0x2da,0x2da,0x2db,0x2dc,0x2dd,0x2dd,0x2de,0x2df,
  200. 0x2e0,0x2e1,0x2e1,0x2e2,0x2e3,0x2e4,0x2e5,0x2e5,
  201. 0x2e6,0x2e7,0x2e8,0x2e9,0x2e9,0x2ea,0x2eb,0x2ec,
  202. 0x2ed,0x2ed,0x2ee,0x2ef,0x2f0,0x2f1,0x2f1,0x2f2,
  203. 0x2f3,0x2f4,0x2f5,0x2f5,0x2f6,0x2f7,0x2f8,0x2f9,
  204. 0x2f9,0x2fa,0x2fb,0x2fc,0x2fd,0x2fd,0x2fe,0x2ff,
  205. 0x300,0x301,0x302,0x302,0x303,0x304,0x305,0x306,
  206. 0x306,0x307,0x308,0x309,0x30a,0x30a,0x30b,0x30c,
  207. 0x30d,0x30e,0x30f,0x30f,0x310,0x311,0x312,0x313,
  208. 0x313,0x314,0x315,0x316,0x317,0x318,0x318,0x319,
  209. 0x31a,0x31b,0x31c,0x31c,0x31d,0x31e,0x31f,0x320,
  210. 0x321,0x321,0x322,0x323,0x324,0x325,0x326,0x326,
  211. 0x327,0x328,0x329,0x32a,0x32a,0x32b,0x32c,0x32d,
  212. 0x32e,0x32f,0x32f,0x330,0x331,0x332,0x333,0x334,
  213. 0x334,0x335,0x336,0x337,0x338,0x339,0x339,0x33a,
  214. 0x33b,0x33c,0x33d,0x33e,0x33e,0x33f,0x340,0x341,
  215. 0x342,0x343,0x343,0x344,0x345,0x346,0x347,0x348,
  216. 0x349,0x349,0x34a,0x34b,0x34c,0x34d,0x34e,0x34e,
  217. 0x34f,0x350,0x351,0x352,0x353,0x353,0x354,0x355,
  218. 0x356,0x357,0x358,0x359,0x359,0x35a,0x35b,0x35c,
  219. 0x35d,0x35e,0x35f,0x35f,0x360,0x361,0x362,0x363,
  220. 0x364,0x364,0x365,0x366,0x367,0x368,0x369,0x36a,
  221. 0x36a,0x36b,0x36c,0x36d,0x36e,0x36f,0x370,0x370,
  222. 0x371,0x372,0x373,0x374,0x375,0x376,0x377,0x377,
  223. 0x378,0x379,0x37a,0x37b,0x37c,0x37d,0x37d,0x37e,
  224. 0x37f,0x380,0x381,0x382,0x383,0x383,0x384,0x385,
  225. 0x386,0x387,0x388,0x389,0x38a,0x38a,0x38b,0x38c,
  226. 0x38d,0x38e,0x38f,0x390,0x391,0x391,0x392,0x393,
  227. 0x394,0x395,0x396,0x397,0x398,0x398,0x399,0x39a,
  228. 0x39b,0x39c,0x39d,0x39e,0x39f,0x39f,0x3a0,0x3a1,
  229. 0x3a2,0x3a3,0x3a4,0x3a5,0x3a6,0x3a7,0x3a7,0x3a8,
  230. 0x3a9,0x3aa,0x3ab,0x3ac,0x3ad,0x3ae,0x3ae,0x3af,
  231. 0x3b0,0x3b1,0x3b2,0x3b3,0x3b4,0x3b5,0x3b6,0x3b6,
  232. 0x3b7,0x3b8,0x3b9,0x3ba,0x3bb,0x3bc,0x3bd,0x3be,
  233. 0x3bf,0x3bf,0x3c0,0x3c1,0x3c2,0x3c3,0x3c4,0x3c5,
  234. 0x3c6,0x3c7,0x3c7,0x3c8,0x3c9,0x3ca,0x3cb,0x3cc,
  235. 0x3cd,0x3ce,0x3cf,0x3d0,0x3d1,0x3d1,0x3d2,0x3d3,
  236. 0x3d4,0x3d5,0x3d6,0x3d7,0x3d8,0x3d9,0x3da,0x3da,
  237. 0x3db,0x3dc,0x3dd,0x3de,0x3df,0x3e0,0x3e1,0x3e2,
  238. 0x3e3,0x3e4,0x3e4,0x3e5,0x3e6,0x3e7,0x3e8,0x3e9,
  239. 0x3ea,0x3eb,0x3ec,0x3ed,0x3ee,0x3ef,0x3ef,0x3f0,
  240. 0x3f1,0x3f2,0x3f3,0x3f4,0x3f5,0x3f6,0x3f7,0x3f8,
  241. 0x3f9,0x3fa,0x3fa,0x3fb,0x3fc,0x3fd,0x3fe,0x3ff
  242. };
  243. /*
  244. * Attenuation according to GM recommendations, in -0.375 dB units.
  245. * table[v] = 40 * log(v / 127) / -0.375
  246. */
  247. static unsigned char snd_opl4_volume_table[128] = {
  248. 255,224,192,173,160,150,141,134,
  249. 128,122,117,113,109,105,102, 99,
  250. 96, 93, 90, 88, 85, 83, 81, 79,
  251. 77, 75, 73, 71, 70, 68, 67, 65,
  252. 64, 62, 61, 59, 58, 57, 56, 54,
  253. 53, 52, 51, 50, 49, 48, 47, 46,
  254. 45, 44, 43, 42, 41, 40, 39, 39,
  255. 38, 37, 36, 35, 34, 34, 33, 32,
  256. 31, 31, 30, 29, 29, 28, 27, 27,
  257. 26, 25, 25, 24, 24, 23, 22, 22,
  258. 21, 21, 20, 19, 19, 18, 18, 17,
  259. 17, 16, 16, 15, 15, 14, 14, 13,
  260. 13, 12, 12, 11, 11, 10, 10, 9,
  261. 9, 9, 8, 8, 7, 7, 6, 6,
  262. 6, 5, 5, 4, 4, 4, 3, 3,
  263. 2, 2, 2, 1, 1, 0, 0, 0
  264. };
  265. /*
  266. * Initializes all voices.
  267. */
  268. void snd_opl4_synth_reset(struct snd_opl4 *opl4)
  269. {
  270. unsigned long flags;
  271. int i;
  272. spin_lock_irqsave(&opl4->reg_lock, flags);
  273. for (i = 0; i < OPL4_MAX_VOICES; i++)
  274. snd_opl4_write(opl4, OPL4_REG_MISC + i, OPL4_DAMP_BIT);
  275. spin_unlock_irqrestore(&opl4->reg_lock, flags);
  276. INIT_LIST_HEAD(&opl4->off_voices);
  277. INIT_LIST_HEAD(&opl4->on_voices);
  278. memset(opl4->voices, 0, sizeof(opl4->voices));
  279. for (i = 0; i < OPL4_MAX_VOICES; i++) {
  280. opl4->voices[i].number = i;
  281. list_add_tail(&opl4->voices[i].list, &opl4->off_voices);
  282. }
  283. snd_midi_channel_set_clear(opl4->chset);
  284. }
  285. /*
  286. * Shuts down all voices.
  287. */
  288. void snd_opl4_synth_shutdown(struct snd_opl4 *opl4)
  289. {
  290. unsigned long flags;
  291. int i;
  292. spin_lock_irqsave(&opl4->reg_lock, flags);
  293. for (i = 0; i < OPL4_MAX_VOICES; i++)
  294. snd_opl4_write(opl4, OPL4_REG_MISC + i,
  295. opl4->voices[i].reg_misc & ~OPL4_KEY_ON_BIT);
  296. spin_unlock_irqrestore(&opl4->reg_lock, flags);
  297. }
  298. /*
  299. * Executes the callback for all voices playing the specified note.
  300. */
  301. static void snd_opl4_do_for_note(struct snd_opl4 *opl4, int note, struct snd_midi_channel *chan,
  302. void (*func)(struct snd_opl4 *opl4, struct opl4_voice *voice))
  303. {
  304. int i;
  305. unsigned long flags;
  306. struct opl4_voice *voice;
  307. spin_lock_irqsave(&opl4->reg_lock, flags);
  308. for (i = 0; i < OPL4_MAX_VOICES; i++) {
  309. voice = &opl4->voices[i];
  310. if (voice->chan == chan && voice->note == note) {
  311. func(opl4, voice);
  312. }
  313. }
  314. spin_unlock_irqrestore(&opl4->reg_lock, flags);
  315. }
  316. /*
  317. * Executes the callback for all voices of to the specified channel.
  318. */
  319. static void snd_opl4_do_for_channel(struct snd_opl4 *opl4,
  320. struct snd_midi_channel *chan,
  321. void (*func)(struct snd_opl4 *opl4, struct opl4_voice *voice))
  322. {
  323. int i;
  324. unsigned long flags;
  325. struct opl4_voice *voice;
  326. spin_lock_irqsave(&opl4->reg_lock, flags);
  327. for (i = 0; i < OPL4_MAX_VOICES; i++) {
  328. voice = &opl4->voices[i];
  329. if (voice->chan == chan) {
  330. func(opl4, voice);
  331. }
  332. }
  333. spin_unlock_irqrestore(&opl4->reg_lock, flags);
  334. }
  335. /*
  336. * Executes the callback for all active voices.
  337. */
  338. static void snd_opl4_do_for_all(struct snd_opl4 *opl4,
  339. void (*func)(struct snd_opl4 *opl4, struct opl4_voice *voice))
  340. {
  341. int i;
  342. unsigned long flags;
  343. struct opl4_voice *voice;
  344. spin_lock_irqsave(&opl4->reg_lock, flags);
  345. for (i = 0; i < OPL4_MAX_VOICES; i++) {
  346. voice = &opl4->voices[i];
  347. if (voice->chan)
  348. func(opl4, voice);
  349. }
  350. spin_unlock_irqrestore(&opl4->reg_lock, flags);
  351. }
  352. static void snd_opl4_update_volume(struct snd_opl4 *opl4, struct opl4_voice *voice)
  353. {
  354. int att;
  355. att = voice->sound->tone_attenuate;
  356. att += snd_opl4_volume_table[opl4->chset->gs_master_volume & 0x7f];
  357. att += snd_opl4_volume_table[voice->chan->gm_volume & 0x7f];
  358. att += snd_opl4_volume_table[voice->chan->gm_expression & 0x7f];
  359. att += snd_opl4_volume_table[voice->velocity];
  360. att = 0x7f - (0x7f - att) * (voice->sound->volume_factor) / 0xfe - volume_boost;
  361. if (att < 0)
  362. att = 0;
  363. else if (att > 0x7e)
  364. att = 0x7e;
  365. snd_opl4_write(opl4, OPL4_REG_LEVEL + voice->number,
  366. (att << 1) | voice->level_direct);
  367. voice->level_direct = 0;
  368. }
  369. static void snd_opl4_update_pan(struct snd_opl4 *opl4, struct opl4_voice *voice)
  370. {
  371. int pan = voice->sound->panpot;
  372. if (!voice->chan->drum_channel)
  373. pan += (voice->chan->control[MIDI_CTL_MSB_PAN] - 0x40) >> 3;
  374. if (pan < -7)
  375. pan = -7;
  376. else if (pan > 7)
  377. pan = 7;
  378. voice->reg_misc = (voice->reg_misc & ~OPL4_PAN_POT_MASK)
  379. | (pan & OPL4_PAN_POT_MASK);
  380. snd_opl4_write(opl4, OPL4_REG_MISC + voice->number, voice->reg_misc);
  381. }
  382. static void snd_opl4_update_vibrato_depth(struct snd_opl4 *opl4,
  383. struct opl4_voice *voice)
  384. {
  385. int depth;
  386. if (voice->chan->drum_channel)
  387. return;
  388. depth = (7 - voice->sound->vibrato)
  389. * (voice->chan->control[MIDI_CTL_VIBRATO_DEPTH] & 0x7f);
  390. depth = (depth >> 7) + voice->sound->vibrato;
  391. voice->reg_lfo_vibrato &= ~OPL4_VIBRATO_DEPTH_MASK;
  392. voice->reg_lfo_vibrato |= depth & OPL4_VIBRATO_DEPTH_MASK;
  393. snd_opl4_write(opl4, OPL4_REG_LFO_VIBRATO + voice->number,
  394. voice->reg_lfo_vibrato);
  395. }
  396. static void snd_opl4_update_pitch(struct snd_opl4 *opl4,
  397. struct opl4_voice *voice)
  398. {
  399. struct snd_midi_channel *chan = voice->chan;
  400. int note, pitch, octave;
  401. note = chan->drum_channel ? 60 : voice->note;
  402. /*
  403. * pitch is in 100/128 cents, so 0x80 is one semitone and
  404. * 0x600 is one octave.
  405. */
  406. pitch = ((note - 60) << 7) * voice->sound->key_scaling / 100 + (60 << 7);
  407. pitch += voice->sound->pitch_offset;
  408. if (!chan->drum_channel)
  409. pitch += chan->gm_rpn_coarse_tuning;
  410. pitch += chan->gm_rpn_fine_tuning >> 7;
  411. pitch += chan->midi_pitchbend * chan->gm_rpn_pitch_bend_range / 0x2000;
  412. if (pitch < 0)
  413. pitch = 0;
  414. else if (pitch >= 0x6000)
  415. pitch = 0x5fff;
  416. octave = pitch / 0x600 - 8;
  417. pitch = snd_opl4_pitch_map[pitch % 0x600];
  418. snd_opl4_write(opl4, OPL4_REG_OCTAVE + voice->number,
  419. (octave << 4) | ((pitch >> 7) & OPL4_F_NUMBER_HIGH_MASK));
  420. voice->reg_f_number = (voice->reg_f_number & OPL4_TONE_NUMBER_BIT8)
  421. | ((pitch << 1) & OPL4_F_NUMBER_LOW_MASK);
  422. snd_opl4_write(opl4, OPL4_REG_F_NUMBER + voice->number, voice->reg_f_number);
  423. }
  424. static void snd_opl4_update_tone_parameters(struct snd_opl4 *opl4,
  425. struct opl4_voice *voice)
  426. {
  427. snd_opl4_write(opl4, OPL4_REG_ATTACK_DECAY1 + voice->number,
  428. voice->sound->reg_attack_decay1);
  429. snd_opl4_write(opl4, OPL4_REG_LEVEL_DECAY2 + voice->number,
  430. voice->sound->reg_level_decay2);
  431. snd_opl4_write(opl4, OPL4_REG_RELEASE_CORRECTION + voice->number,
  432. voice->sound->reg_release_correction);
  433. snd_opl4_write(opl4, OPL4_REG_TREMOLO + voice->number,
  434. voice->sound->reg_tremolo);
  435. }
  436. /* allocate one voice */
  437. static struct opl4_voice *snd_opl4_get_voice(struct snd_opl4 *opl4)
  438. {
  439. /* first, try to get the oldest key-off voice */
  440. if (!list_empty(&opl4->off_voices))
  441. return list_entry(opl4->off_voices.next, struct opl4_voice, list);
  442. /* then get the oldest key-on voice */
  443. snd_assert(!list_empty(&opl4->on_voices), );
  444. return list_entry(opl4->on_voices.next, struct opl4_voice, list);
  445. }
  446. static void snd_opl4_wait_for_wave_headers(struct snd_opl4 *opl4)
  447. {
  448. int timeout = 200;
  449. while ((inb(opl4->fm_port) & OPL4_STATUS_LOAD) && --timeout > 0)
  450. udelay(10);
  451. }
  452. void snd_opl4_note_on(void *private_data, int note, int vel, struct snd_midi_channel *chan)
  453. {
  454. struct snd_opl4 *opl4 = private_data;
  455. const struct opl4_region_ptr *regions;
  456. struct opl4_voice *voice[2];
  457. const struct opl4_sound *sound[2];
  458. int voices = 0, i;
  459. unsigned long flags;
  460. /* determine the number of voices and voice parameters */
  461. i = chan->drum_channel ? 0x80 : (chan->midi_program & 0x7f);
  462. regions = &snd_yrw801_regions[i];
  463. for (i = 0; i < regions->count; i++) {
  464. if (note >= regions->regions[i].key_min &&
  465. note <= regions->regions[i].key_max) {
  466. sound[voices] = &regions->regions[i].sound;
  467. if (++voices >= 2)
  468. break;
  469. }
  470. }
  471. /* allocate and initialize the needed voices */
  472. spin_lock_irqsave(&opl4->reg_lock, flags);
  473. for (i = 0; i < voices; i++) {
  474. voice[i] = snd_opl4_get_voice(opl4);
  475. list_del(&voice[i]->list);
  476. list_add_tail(&voice[i]->list, &opl4->on_voices);
  477. voice[i]->chan = chan;
  478. voice[i]->note = note;
  479. voice[i]->velocity = vel & 0x7f;
  480. voice[i]->sound = sound[i];
  481. }
  482. /* set tone number (triggers header loading) */
  483. for (i = 0; i < voices; i++) {
  484. voice[i]->reg_f_number =
  485. (sound[i]->tone >> 8) & OPL4_TONE_NUMBER_BIT8;
  486. snd_opl4_write(opl4, OPL4_REG_F_NUMBER + voice[i]->number,
  487. voice[i]->reg_f_number);
  488. snd_opl4_write(opl4, OPL4_REG_TONE_NUMBER + voice[i]->number,
  489. sound[i]->tone & 0xff);
  490. }
  491. /* set parameters which can be set while loading */
  492. for (i = 0; i < voices; i++) {
  493. voice[i]->reg_misc = OPL4_LFO_RESET_BIT;
  494. snd_opl4_update_pan(opl4, voice[i]);
  495. snd_opl4_update_pitch(opl4, voice[i]);
  496. voice[i]->level_direct = OPL4_LEVEL_DIRECT_BIT;
  497. snd_opl4_update_volume(opl4, voice[i]);
  498. }
  499. spin_unlock_irqrestore(&opl4->reg_lock, flags);
  500. /* wait for completion of loading */
  501. snd_opl4_wait_for_wave_headers(opl4);
  502. /* set remaining parameters */
  503. spin_lock_irqsave(&opl4->reg_lock, flags);
  504. for (i = 0; i < voices; i++) {
  505. snd_opl4_update_tone_parameters(opl4, voice[i]);
  506. voice[i]->reg_lfo_vibrato = voice[i]->sound->reg_lfo_vibrato;
  507. snd_opl4_update_vibrato_depth(opl4, voice[i]);
  508. }
  509. /* finally, switch on all voices */
  510. for (i = 0; i < voices; i++) {
  511. voice[i]->reg_misc =
  512. (voice[i]->reg_misc & 0x1f) | OPL4_KEY_ON_BIT;
  513. snd_opl4_write(opl4, OPL4_REG_MISC + voice[i]->number,
  514. voice[i]->reg_misc);
  515. }
  516. spin_unlock_irqrestore(&opl4->reg_lock, flags);
  517. }
  518. static void snd_opl4_voice_off(struct snd_opl4 *opl4, struct opl4_voice *voice)
  519. {
  520. list_del(&voice->list);
  521. list_add_tail(&voice->list, &opl4->off_voices);
  522. voice->reg_misc &= ~OPL4_KEY_ON_BIT;
  523. snd_opl4_write(opl4, OPL4_REG_MISC + voice->number, voice->reg_misc);
  524. }
  525. void snd_opl4_note_off(void *private_data, int note, int vel, struct snd_midi_channel *chan)
  526. {
  527. struct snd_opl4 *opl4 = private_data;
  528. snd_opl4_do_for_note(opl4, note, chan, snd_opl4_voice_off);
  529. }
  530. static void snd_opl4_terminate_voice(struct snd_opl4 *opl4, struct opl4_voice *voice)
  531. {
  532. list_del(&voice->list);
  533. list_add_tail(&voice->list, &opl4->off_voices);
  534. voice->reg_misc = (voice->reg_misc & ~OPL4_KEY_ON_BIT) | OPL4_DAMP_BIT;
  535. snd_opl4_write(opl4, OPL4_REG_MISC + voice->number, voice->reg_misc);
  536. }
  537. void snd_opl4_terminate_note(void *private_data, int note, struct snd_midi_channel *chan)
  538. {
  539. struct snd_opl4 *opl4 = private_data;
  540. snd_opl4_do_for_note(opl4, note, chan, snd_opl4_terminate_voice);
  541. }
  542. void snd_opl4_control(void *private_data, int type, struct snd_midi_channel *chan)
  543. {
  544. struct snd_opl4 *opl4 = private_data;
  545. switch (type) {
  546. case MIDI_CTL_MSB_MODWHEEL:
  547. chan->control[MIDI_CTL_VIBRATO_DEPTH] = chan->control[MIDI_CTL_MSB_MODWHEEL];
  548. snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_vibrato_depth);
  549. break;
  550. case MIDI_CTL_MSB_MAIN_VOLUME:
  551. snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_volume);
  552. break;
  553. case MIDI_CTL_MSB_PAN:
  554. snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_pan);
  555. break;
  556. case MIDI_CTL_MSB_EXPRESSION:
  557. snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_volume);
  558. break;
  559. case MIDI_CTL_VIBRATO_RATE:
  560. /* not yet supported */
  561. break;
  562. case MIDI_CTL_VIBRATO_DEPTH:
  563. snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_vibrato_depth);
  564. break;
  565. case MIDI_CTL_VIBRATO_DELAY:
  566. /* not yet supported */
  567. break;
  568. case MIDI_CTL_E1_REVERB_DEPTH:
  569. /*
  570. * Each OPL4 voice has a bit called "Pseudo-Reverb", but
  571. * IMHO _not_ using it enhances the listening experience.
  572. */
  573. break;
  574. case MIDI_CTL_PITCHBEND:
  575. snd_opl4_do_for_channel(opl4, chan, snd_opl4_update_pitch);
  576. break;
  577. }
  578. }
  579. void snd_opl4_sysex(void *private_data, unsigned char *buf, int len,
  580. int parsed, struct snd_midi_channel_set *chset)
  581. {
  582. struct snd_opl4 *opl4 = private_data;
  583. if (parsed == SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME)
  584. snd_opl4_do_for_all(opl4, snd_opl4_update_volume);
  585. }