| 1 | #include <SDL/SDL.h>\r |
| 2 | \r |
| 3 | #include "dblbuf.h"\r |
| 4 | #include "executor.h"\r |
| 5 | #include "kvidha.h"\r |
| 6 | \r |
| 7 | static unsigned short SoundBufferPos;\r |
| 8 | \r |
| 9 | void StartPlayBack(void)\r |
| 10 | {\r |
| 11 | SDL_PauseAudio(0);\r |
| 12 | return;\r |
| 13 | }\r |
| 14 | \r |
| 15 | static void SBCallback(void *uudata, signed short *Buffer, int Length)\r |
| 16 | {\r |
| 17 | int i;\r |
| 18 | unsigned short Pos, Cur, Left;\r |
| 19 | \r |
| 20 | Pos = 0;\r |
| 21 | Length /= 2;\r |
| 22 | while(Length > 0)\r |
| 23 | {\r |
| 24 | if(SoundBufferPos >= (SB_SIZE >> 1))\r |
| 25 | {\r |
| 26 | FillBuffer();\r |
| 27 | SoundBufferPos = 0;\r |
| 28 | }\r |
| 29 | Left = (SB_SIZE >> 1) - SoundBufferPos;\r |
| 30 | Cur = (Length > Left)?Left:Length;\r |
| 31 | for(i = 0; i < Cur; i++)\r |
| 32 | Buffer[Pos + i] = (((signed char)SoundBuffer[SoundBufferPos + i]) - 128) * 255;\r |
| 33 | Pos += Cur;\r |
| 34 | SoundBufferPos += Cur;\r |
| 35 | Length -= Cur;\r |
| 36 | }\r |
| 37 | }\r |
| 38 | \r |
| 39 | unsigned char SBReset(void)\r |
| 40 | {\r |
| 41 | SDL_AudioSpec my, got;\r |
| 42 | \r |
| 43 | SoundBufferPos = SB_SIZE;\r |
| 44 | my.freq = 44100;\r |
| 45 | my.format = AUDIO_S16;\r |
| 46 | my.channels = 1;\r |
| 47 | my.samples = SB_SIZE >> 1;\r |
| 48 | my.callback = (void (*)(void *, unsigned char *, int))SBCallback;\r |
| 49 | if(SDL_OpenAudio(&my, &got) < 0)\r |
| 50 | {\r |
| 51 | printf("Could not open SDL audio: %s\n", SDL_GetError());\r |
| 52 | return(1);\r |
| 53 | }\r |
| 54 | if((got.freq != 44100) ||\r |
| 55 | (got.format != AUDIO_S16) ||\r |
| 56 | (got.channels != 1))\r |
| 57 | {\r |
| 58 | printf("Audio format mismatch(%i %i %i)!\n", got.freq, got.format, got.channels);\r |
| 59 | return(1);\r |
| 60 | }\r |
| 61 | return(0);\r |
| 62 | }\r |
| 63 | \r |
| 64 | void TerminatePlayBack(void)\r |
| 65 | {\r |
| 66 | SDL_PauseAudio(1);\r |
| 67 | return;\r |
| 68 | }\r |
| 69 | \r |
| 70 | /*void DSPOutput(unsigned char Value)\r |
| 71 | {\r |
| 72 | while((inp(DSPAddress + 12) & 0x80) == 0x80);\r |
| 73 | outp(DSPAddress + 12, Value);\r |
| 74 | }\r |
| 75 | \r |
| 76 | unsigned char DSPInput(void)\r |
| 77 | {\r |
| 78 | while((inp(DSPAddress + 14) & 0x80) == 0);\r |
| 79 | return(inp(DSPAddress + 10));\r |
| 80 | }\r |
| 81 | \r |
| 82 | void StartPlayBack(void)\r |
| 83 | {\r |
| 84 | unsigned long PhysAddress;\r |
| 85 | \r |
| 86 | PhysAddress = ((unsigned long)DOSSoundBuffer.rm_segment << 4);\r |
| 87 | outp((DMAChannel < 4)?10:0xD4, 4 | (DMAChannel & 3));\r |
| 88 | outp((DMAChannel < 4)?12:0xD8, 0);\r |
| 89 | outp((DMAChannel < 4)?11:0xD6, 0x58 | (DMAChannel & 3));\r |
| 90 | outp(DMAAddress, (unsigned char)(PhysAddress & 0xFF));\r |
| 91 | outp(DMAAddress, (unsigned char)((PhysAddress & 0xFF00) >> 8));\r |
| 92 | outp(DMAPage, (unsigned char)((PhysAddress & 0x0F0000) >> 16));\r |
| 93 | outp(DMACount, (unsigned char)((SB_SIZE - 1) & 0xFF));\r |
| 94 | outp(DMACount, (unsigned char)(((SB_SIZE - 1) & 0xFF00) >> 8));\r |
| 95 | outp((DMAChannel < 4)?10:0xD4, (DMAChannel & 3));\r |
| 96 | DSPOutput(0x40);\r |
| 97 | DSPOutput((unsigned char)(((65536 - (256000000 / ((unsigned long)SBSampleRate))) & 0xFF00) / 0x100));\r |
| 98 | DSPOutput(0x48);\r |
| 99 | DSPOutput((unsigned char)((SB_SIZE - 2) >> 1));\r |
| 100 | DSPOutput((unsigned char)((SB_SIZE - 2) >> 9));\r |
| 101 | DSPOutput(0x1C);\r |
| 102 | }\r |
| 103 | \r |
| 104 | void SBInt(void)\r |
| 105 | {\r |
| 106 | if(DMAChannel < 4)\r |
| 107 | {\r |
| 108 | inp(DSPAddress + 14);\r |
| 109 | } else {\r |
| 110 | outp(DSPAddress + 4, 0x82);\r |
| 111 | if((inp(DSPAddress + 5) & 2) == 2)\r |
| 112 | inp(DSPAddress + 15);\r |
| 113 | }\r |
| 114 | if(ReadyBuffer == 0)\r |
| 115 | ReadyBuffer = 1;\r |
| 116 | else\r |
| 117 | ReadyBuffer = 0;\r |
| 118 | BufferReady = 1;\r |
| 119 | FillBuffer();\r |
| 120 | outp(PICAddress, 0x20);\r |
| 121 | }\r |
| 122 | \r |
| 123 | unsigned char SBReset(void)\r |
| 124 | {\r |
| 125 | unsigned short i, Success;\r |
| 126 | unsigned long o;\r |
| 127 | \r |
| 128 | Success = 0;\r |
| 129 | for(i = 0; (i < 5) && (Success == 0); i++)\r |
| 130 | {\r |
| 131 | outp(DSPAddress + 6, 1);\r |
| 132 | for(o = 0; o < 100000; o++);\r |
| 133 | outp(DSPAddress + 6, 0);\r |
| 134 | if(DSPInput() == 0xAA)\r |
| 135 | Success = 1;\r |
| 136 | }\r |
| 137 | if(Success == 0)\r |
| 138 | return(1);\r |
| 139 | switch(DMAChannel)\r |
| 140 | {\r |
| 141 | case 0:\r |
| 142 | DMAPage = 0x87;\r |
| 143 | break;\r |
| 144 | case 1:\r |
| 145 | DMAPage = 0x83;\r |
| 146 | break;\r |
| 147 | case 2:\r |
| 148 | DMAPage = 0x81;\r |
| 149 | break;\r |
| 150 | case 3:\r |
| 151 | DMAPage = 0x82;\r |
| 152 | break;\r |
| 153 | case 4:\r |
| 154 | DMAPage = 0x8F;\r |
| 155 | break;\r |
| 156 | case 5:\r |
| 157 | DMAPage = 0x8B;\r |
| 158 | break;\r |
| 159 | case 6:\r |
| 160 | DMAPage = 0x89;\r |
| 161 | break;\r |
| 162 | case 7:\r |
| 163 | DMAPage = 0x8A;\r |
| 164 | break;\r |
| 165 | default:\r |
| 166 | return(2);\r |
| 167 | }\r |
| 168 | if(DMAChannel < 4)\r |
| 169 | {\r |
| 170 | DMAAddress = DMAChannel << 1;\r |
| 171 | DMACount = (DMAChannel << 1) + 1;\r |
| 172 | } else {\r |
| 173 | DMAAddress = 0xC0 + ((DMAChannel - 4) << 2);\r |
| 174 | DMACount = 0xC2 + ((DMAChannel - 4) << 2);\r |
| 175 | }\r |
| 176 | PICAddress = (IRQLine >= 8)?0xA0:0x20;\r |
| 177 | outp(DSPAddress + 4, 10);\r |
| 178 | outp(DSPAddress + 5, 0);\r |
| 179 | outp(DSPAddress + 4, 4);\r |
| 180 | outp(DSPAddress + 5, 255);\r |
| 181 | outp(DSPAddress + 4, 34);\r |
| 182 | outp(DSPAddress + 5, 255);\r |
| 183 | DSPOutput(0xD1);\r |
| 184 | SetISR(IRQLine + ((IRQLine >= 8)?0x68:8), (unsigned long)SBInt, &NewSBInt, &OldSBInt);\r |
| 185 | OldMask = inp(PICAddress + 1);\r |
| 186 | outp(PICAddress + 1, OldMask & ~(1 << ((IRQLine >= 8)?(IRQLine - 8):IRQLine)));\r |
| 187 | return(0);\r |
| 188 | }\r |
| 189 | \r |
| 190 | void TerminatePlayBack(void)\r |
| 191 | {\r |
| 192 | DSPOutput((unsigned char)((DMAChannel < 4)?0xDA:0xD9));\r |
| 193 | outp(PICAddress + 1, OldMask);\r |
| 194 | ReturnISR(IRQLine + ((IRQLine >= 8)?0x68:8), &NewSBInt, &OldSBInt);\r |
| 195 | }\r |
| 196 | */\r |