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annotate src/audio/mint/SDL_mintaudio_xbios.c @ 961:185acc07127a

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Date: Fri, 29 Oct 2004 11:47:09 +0200 From: Patrice Mandin Subject: Reworked audio drivers for Atari platform These are reworked audio drivers for the Atari platform. Previous drivers were missing some features: - Test external clock plugged to DSP port on Atari Falcon 030. - Ability to select internal or external clock. So now, I generate a list of frequencies available, with the master clock and predivisor to use. One big caveat to this: I do not have an external clock, so I hope it works.
author Patrice Mandin <patmandin@gmail.com>
date Fri, 29 Oct 2004 09:56:53 +0000
parents b8d311d90021
children 176240cf4405
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /*
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24 MiNT audio driver
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25 using XBIOS functions (Falcon)
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26
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27 Patrice Mandin, Didier Méquignon
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28 */
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29
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30 #include <stdlib.h>
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31 #include <stdio.h>
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32 #include <string.h>
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33 #include <unistd.h>
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34
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35 /* Mint includes */
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36 #include <mint/osbind.h>
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37 #include <mint/falcon.h>
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38 #include <mint/cookie.h>
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39
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40 #include "SDL_endian.h"
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41 #include "SDL_audio.h"
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42 #include "SDL_audio_c.h"
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43 #include "SDL_audiomem.h"
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44 #include "SDL_sysaudio.h"
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45
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46 #include "SDL_atarimxalloc_c.h"
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47
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48 #include "SDL_mintaudio.h"
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49 #include "SDL_mintaudio_dma8.h"
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50
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51 /*--- Defines ---*/
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52
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53 #define MINT_AUDIO_DRIVER_NAME "mint_xbios"
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54
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55 /* Debug print info */
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56 #define DEBUG_NAME "audio:xbios: "
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57 #if 1
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58 #define DEBUG_PRINT(what) \
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59 { \
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60 printf what; \
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61 }
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62 #else
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63 #define DEBUG_PRINT(what)
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64 #endif
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65
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66 /*--- Static variables ---*/
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67
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68 static unsigned long cookie_snd;
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69
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70 /*--- Audio driver functions ---*/
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71
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72 static void Mint_CloseAudio(_THIS);
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73 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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74 static void Mint_LockAudio(_THIS);
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75 static void Mint_UnlockAudio(_THIS);
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76
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77 /* To check/init hardware audio */
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78 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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79 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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80
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81 /*--- Audio driver bootstrap functions ---*/
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82
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83 static int Audio_Available(void)
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84 {
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85 const char *envr = getenv("SDL_AUDIODRIVER");
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86
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87 /* Check if user asked a different audio driver */
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88 if ((envr) && (strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
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89 DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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90 return(0);
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91 }
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92
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93 /* Cookie _SND present ? if not, assume ST machine */
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94 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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95 cookie_snd = SND_PSG;
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96 }
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97
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98 /* Check if we have 16 bits audio */
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99 if ((cookie_snd & SND_16BIT)==0) {
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100 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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101 return(0);
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102 }
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103
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104 /* Check if audio is lockable */
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105 if (Locksnd()!=1) {
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106 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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107 return(0);
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108 }
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109
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110 Unlocksnd();
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111
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112 DEBUG_PRINT((DEBUG_NAME "XBIOS audio available!\n"));
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113 return(1);
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114 }
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115
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116 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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117 {
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118 free(device->hidden);
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119 free(device);
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120 }
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121
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122 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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123 {
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124 SDL_AudioDevice *this;
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125
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126 /* Initialize all variables that we clean on shutdown */
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127 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
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128 if ( this ) {
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129 memset(this, 0, (sizeof *this));
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130 this->hidden = (struct SDL_PrivateAudioData *)
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131 malloc((sizeof *this->hidden));
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132 }
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133 if ( (this == NULL) || (this->hidden == NULL) ) {
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134 SDL_OutOfMemory();
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135 if ( this ) {
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136 free(this);
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137 }
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138 return(0);
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139 }
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140 memset(this->hidden, 0, (sizeof *this->hidden));
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141
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142 /* Set the function pointers */
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143 this->OpenAudio = Mint_OpenAudio;
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144 this->CloseAudio = Mint_CloseAudio;
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145 this->LockAudio = Mint_LockAudio;
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146 this->UnlockAudio = Mint_UnlockAudio;
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147 this->free = Audio_DeleteDevice;
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148
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149 return this;
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150 }
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151
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152 AudioBootStrap MINTAUDIO_XBIOS_bootstrap = {
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153 MINT_AUDIO_DRIVER_NAME, "MiNT XBIOS audio driver",
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154 Audio_Available, Audio_CreateDevice
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155 };
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156
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157 static void Mint_LockAudio(_THIS)
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158 {
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159 /* Stop replay */
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160 Buffoper(0);
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161 }
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162
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163 static void Mint_UnlockAudio(_THIS)
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164 {
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165 /* Restart replay */
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166 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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167 }
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168
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169 static void Mint_CloseAudio(_THIS)
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170 {
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171 /* Stop replay */
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172 Buffoper(0);
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173
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diff changeset
174 /* Uninstall interrupt */
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175 Jdisint(MFP_DMASOUND);
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176
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177 /* Wait if currently playing sound */
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178 while (SDL_MintAudio_mutex != 0) {
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179 }
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180
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181 /* Clear buffers */
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182 if (SDL_MintAudio_audiobuf[0]) {
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parents:
diff changeset
183 Mfree(SDL_MintAudio_audiobuf[0]);
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diff changeset
184 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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185 }
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186
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187 /* Unlock sound system */
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188 Unlocksnd();
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189 }
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190
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
191 /* Falcon XBIOS implementation of Devconnect() is buggy with external clock */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
192 static void Devconnect2(int src, int dst, int sclk, int pre)
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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193 {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
194 static const unsigned short MASK1[3] = { 0, 0x6000, 0 };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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195 static const unsigned short MASK2[4] = { 0xFFF0, 0xFF8F, 0xF0FF, 0x0FFF };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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196 static const unsigned short INDEX1[4] = { 1, 3, 5, 7 };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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197 static const unsigned short INDEX2[4] = { 0, 2, 4, 6 };
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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198 unsigned short sync_div,dev_ctrl,dest_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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199 void *oldstack;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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200
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
201 if (dst==0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
202 return;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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203 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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204
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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205 oldstack=(void *)Super(0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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206
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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207 dev_ctrl = DMAAUDIO_IO.dev_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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208 dest_ctrl = DMAAUDIO_IO.dest_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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209 dev_ctrl &= MASK2[src];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
210
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
211 if (src==ADC) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
212 dev_ctrl |= MASK1[sclk];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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213 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
214 dev_ctrl |= (INDEX1[sclk] << (src<<4));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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215 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
216
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
217 if (dst & DMAREC) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
218 dest_ctrl &= 0xFFF0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
219 dest_ctrl |= INDEX1[src];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
220 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
221
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
222 if (dst & DSPRECV) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
223 dest_ctrl &= 0xFF8F;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
224 dest_ctrl |= (INDEX1[src]<<4);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
225 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
226
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
227 if (dst & EXTOUT) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
228 dest_ctrl &= 0xF0FF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
229 dest_ctrl |= (INDEX1[src]<<8);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
230 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
231
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
232 if (dst & DAC) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
233 dev_ctrl &= 0x0FFF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
234 dev_ctrl |= MASK1[sclk];
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
235 dest_ctrl &= 0x0FFF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
236 dest_ctrl |= (INDEX2[src]<<12);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
237 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
238
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
239 sync_div = DMAAUDIO_IO.sync_div;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
240 if (sclk==CLKEXT) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
241 pre<<=8;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
242 sync_div &= 0xF0FF;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
243 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
244 sync_div &= 0xFFF0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
245 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
246 sync_div |= pre;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
247
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
248 DMAAUDIO_IO.dev_ctrl = dev_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
249 DMAAUDIO_IO.dest_ctrl = dest_ctrl;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
250 DMAAUDIO_IO.sync_div = sync_div;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
251
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
252 Super(oldstack);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
253 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
254
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
255 static Uint32 Mint_CheckExternalClock(void)
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
256 {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
257 #define SIZE_BUF_CLOCK_MEASURE (44100/10)
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
258
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
259 unsigned long cookie_snd;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
260 Uint32 masterclock;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
261 char *buffer;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
262 int i;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
263
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
264 /* DSP present with its GPIO port ? */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
265 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
266 return 0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
267 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
268 if ((cookie_snd & SND_DSP)==0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
269 return 0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
270 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
271
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
272 buffer = Atari_SysMalloc(SIZE_BUF_CLOCK_MEASURE, MX_STRAM);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
273 if (buffer==NULL) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
274 DEBUG_PRINT((DEBUG_NAME "Not enough memory for the measure\n"));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
275 return 0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
276 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
277 memset(buffer, 0, SIZE_BUF_CLOCK_MEASURE);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
278
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
279 masterclock=0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
280
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
281 Buffoper(0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
282 Settracks(0,0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
283 Setmontracks(0);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
284 Setmode(MONO8);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
285 Jdisint(MFP_TIMERA);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
286
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
287 for (i=0; i<2; i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
288 Gpio(GPIO_SET,7); /* DSP port gpio outputs */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
289 Gpio(GPIO_WRITE,2+i); /* 22.5792/24.576 MHz for 44.1/48KHz */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
290 Devconnect2(DMAPLAY, DAC, CLKEXT, CLK50K); /* Matrix and clock source */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
291 Setbuffer(0, buffer, buffer + SIZE_BUF_CLOCK_MEASURE); /* Set buffer */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
292 Xbtimer(XB_TIMERA, 5, 38, SDL_MintAudio_XbiosInterruptMeasureClock); /* delay mode timer A, prediv /64, 1KHz */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
293 Jenabint(MFP_TIMERA);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
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diff changeset
294 SDL_MintAudio_clocktics = 0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
295 Buffoper(SB_PLA_ENA);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
296 usleep(110000);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
297
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
298 if((Buffoper(-1) & 1)==0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
299 if (SDL_MintAudio_clocktics) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
300 unsigned long khz;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
301
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
302 khz = ((SIZE_BUF_CLOCK_MEASURE/SDL_MintAudio_clocktics) +1) & 0xFFFFFFFE;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
303 DEBUG_PRINT((DEBUG_NAME "measure %d: freq=%lu KHz\n", i+1, khz));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
304
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
305 if (i==0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
306 if(khz==44) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
307 masterclock = MASTERCLOCK_44K;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
308 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
309 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
310 if(khz==48) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
311 masterclock = MASTERCLOCK_48K;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
312 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
313 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
314 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
315 DEBUG_PRINT((DEBUG_NAME "No measure\n"));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
316 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
317 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
318 DEBUG_PRINT((DEBUG_NAME "No SDMA clock\n"));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
319 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
320
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
321 Buffoper(0); /* stop */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
322 Jdisint(MFP_TIMERA); /* Uninstall interrupt */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
323 if (masterclock == 0)
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
324 break;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
325 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
326
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
327 Mfree(buffer);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
328 return masterclock;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
329 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
330
644
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diff changeset
331 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
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parents:
diff changeset
332 {
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parents:
diff changeset
333 int i;
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
334 Uint32 extclock;
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
335
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
336 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
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parents:
diff changeset
337 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
338 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
339 DEBUG_PRINT(("channels=%d, ", spec->channels));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
340 DEBUG_PRINT(("freq=%d\n", spec->freq));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
341
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
342 spec->format |= 0x8000; /* Audio is always signed */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
343 if ((spec->format & 0x00ff)==16) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
344 spec->format |= 0x1000; /* Audio is always big endian */
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parents:
diff changeset
345 spec->channels=2; /* 16 bits always stereo */
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
346 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
347
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
348 extclock=Mint_CheckExternalClock();
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
349
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
350 /* Standard clocks */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
351 MINTAUDIO_freqcount=0;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
352 for (i=1;i<12;i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
353 /* Remove unusable Falcon codec predivisors */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
354 if ((i==6) || (i==8) || (i==10)) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
355 continue;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
356 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
357 SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), MASTERCLOCK_FALCON1, i);
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
358 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
359
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
360 if (extclock>0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
361 for (i=1; i<4; i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
362 SDL_MintAudio_AddFrequency(this, extclock/(MASTERPREDIV_FALCON*(1<<i)), extclock, (1<<i)-1);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
363 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
364 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
365
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
366 #if 1
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
367 for (i=0; i<MINTAUDIO_freqcount; i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
368 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
369 i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
370 MINTAUDIO_frequencies[i].predivisor
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
371 ));
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
372 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
373 #endif
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
374
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
375 MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
376 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
377
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
378 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
379 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
704
c4803992e09c Small bugfixes
Patrice Mandin <patmandin@gmail.com>
parents: 644
diff changeset
380 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
381 DEBUG_PRINT(("channels=%d, ", spec->channels));
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
382 DEBUG_PRINT(("freq=%d\n", spec->freq));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
383
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
384 return 0;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
385 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
386
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
387 static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
388 {
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
389 int channels_mode, dmaclock, prediv;
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
390 void *buffer;
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
391
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
392 /* Stop currently playing sound */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
393 Buffoper(0);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
394
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
395 /* Set replay tracks */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
396 Settracks(0,0);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
397 Setmontracks(0);
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
398
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
399 /* Select replay format */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
400 channels_mode=STEREO16;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
401 switch (spec->format & 0xff) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
402 case 8:
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
403 if (spec->channels==2) {
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
404 channels_mode=STEREO8;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
405 } else {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
406 channels_mode=MONO8;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
407 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
408 break;
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
409 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
410 if (Setmode(channels_mode)<0) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
411 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
412 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
413
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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parents: 769
diff changeset
414 dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
415 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
416 if (dmaclock != MASTERCLOCK_FALCON1) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
417 Gpio(GPIO_SET,7); /* DSP port gpio outputs */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
418 if (dmaclock == MASTERCLOCK_44K) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
419 Gpio(GPIO_WRITE,2); /* 22.5792 MHz for 44.1KHz */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
420 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
421 Gpio(GPIO_WRITE,3); /* 24.576 MHz for 48KHz */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
422 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
423 Devconnect2(DMAPLAY, DAC, CLKEXT, prediv);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
424 } else {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
425 Devconnect(DMAPLAY, DAC, CLK25M, prediv, 1);
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
426 }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
427
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
428 /* Set buffer */
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
429 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
430 if (Setbuffer(0, buffer, buffer + spec->size)<0) {
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
431 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
432 }
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
433
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
434 /* Install interrupt */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
435 Jdisint(MFP_DMASOUND);
594422ab8f9f Atari MiNT: added more audio drivers
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436 Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);
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437 Jenabint(MFP_DMASOUND);
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438
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439 if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
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440 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
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441 }
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442
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443 /* Go */
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444 Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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445 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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446 }
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447
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448 static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
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449 {
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450 /* Lock sound system */
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451 if (Locksnd()!=1) {
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452 SDL_SetError("Mint_OpenAudio: Audio system already in use");
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453 return(-1);
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454 }
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455
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456 SDL_MintAudio_device = this;
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457
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458 /* Check audio capabilities */
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459 if (Mint_CheckAudio(this, spec)==-1) {
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460 return -1;
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461 }
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462
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463 SDL_CalculateAudioSpec(spec);
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464
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465 /* Allocate memory for audio buffers in DMA-able RAM */
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466 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
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467
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468 SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
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469 if (SDL_MintAudio_audiobuf[0]==NULL) {
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470 SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
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471 return (-1);
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472 }
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473 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
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474 SDL_MintAudio_numbuf=0;
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475 memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
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476 SDL_MintAudio_audiosize = spec->size;
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477 SDL_MintAudio_mutex = 0;
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478
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479 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
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480 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
594422ab8f9f Atari MiNT: added more audio drivers
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481
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482 /* Setup audio hardware */
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483 Mint_InitAudio(this, spec);
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484
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485 return(1); /* We don't use threaded audio */
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486 }