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annotate src/audio/mint/SDL_mintaudio_mcsn.c @ 2218:6cc82cad8b77

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1.3 video API design chat
author Sam Lantinga <slouken@libsdl.org>
date Tue, 07 Aug 2007 07:08:25 +0000
parents 29e07f91bc1f
children 99210400e8b9
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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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 #include "SDL_config.h"
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23
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24 /*
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25 MiNT audio driver
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26 using XBIOS functions (MacSound compatible driver)
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27
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28 Patrice Mandin
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29 */
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30
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31 #include <support.h>
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32
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33 /* Mint includes */
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34 #include <mint/osbind.h>
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35 #include <mint/falcon.h>
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36 #include <mint/cookie.h>
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37
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38 #include "SDL_audio.h"
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39 #include "../SDL_audio_c.h"
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40 #include "../SDL_sysaudio.h"
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41
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42 #include "../../video/ataricommon/SDL_atarimxalloc_c.h"
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43
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44 #include "SDL_mintaudio.h"
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45 #include "SDL_mintaudio_mcsn.h"
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46
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47 /*--- Defines ---*/
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48
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49 #define MINT_AUDIO_DRIVER_NAME "mint_mcsn"
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50
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51 /* Debug print info */
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52 #define DEBUG_NAME "audio:mcsn: "
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53 #if 0
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54 #define DEBUG_PRINT(what) \
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55 { \
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56 printf what; \
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57 }
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58 #else
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59 #define DEBUG_PRINT(what)
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60 #endif
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61
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62 /*--- Static variables ---*/
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63
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64 static unsigned long cookie_snd = 0;
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65 static unsigned long cookie_mch = 0;
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66 static cookie_mcsn_t *cookie_mcsn = NULL;
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67
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68 static void
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69 MINTMCSN_LockDevice(_THIS)
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70 {
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71 /* Stop replay */
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72 Buffoper(0);
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73 }
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74
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75 static void
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76 MINTMCSN_UnlockDevice(_THIS)
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77 {
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78 /* Restart replay */
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79 Buffoper(SB_PLA_ENA | SB_PLA_RPT);
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80 }
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81
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82 static void
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83 MINTMCSN_CloseDevice(_THIS)
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84 {
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85 if (this->hidden != NULL) {
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86 /* Stop replay */
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87 SDL_MintAudio_WaitThread();
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88 Buffoper(0);
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89
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90 if (!SDL_MintAudio_mint_present) {
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91 /* Uninstall interrupt */
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92 Jdisint(MFP_DMASOUND);
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93 }
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95 /* Wait if currently playing sound */
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96 while (SDL_MintAudio_mutex != 0) {
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97 }
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99 /* Clear buffers */
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100 if (SDL_MintAudio_audiobuf[0]) {
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101 Mfree(SDL_MintAudio_audiobuf[0]);
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102 SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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103 }
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104
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105 /* Unlock sound system */
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106 Unlocksnd();
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107
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108 SDL_free(this->hidden);
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109 this->hidden = NULL;
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110 }
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111 }
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112
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113 static int
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114 MINTMCSN_CheckAudio(_THIS)
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115 {
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116 int i;
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117 unsigned long masterclock, masterprediv;
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118
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119 DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",
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120 SDL_AUDIO_BITSIZE(this->spec.format)));
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121 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format)));
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122 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format)));
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123 DEBUG_PRINT(("big endian=%d, ",
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124 SDL_AUDIO_ISBIGENDIAN(this->spec.format)));
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125 DEBUG_PRINT(("channels=%d, ", this->spec.channels));
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126 DEBUG_PRINT(("freq=%d\n", this->spec.freq));
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127
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128 if (this->spec.channels > 2) {
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129 this->spec.channels = 2; /* no more than stereo! */
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130 }
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131
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132 /* Check formats available */
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133 MINTAUDIO_freqcount = 0;
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134 switch (cookie_mcsn->play) {
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135 case MCSN_ST:
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diff changeset
136 this->spec.channels = 1;
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137 this->spec.format = AUDIO_S8; /* FIXME: is it signed or unsigned ? */
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138 SDL_MintAudio_AddFrequency(this, 12500, 0, 0, -1);
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diff changeset
139 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
140 case MCSN_TT: /* Also STE, Mega STE */
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diff changeset
141 this->spec.format = AUDIO_S8;
1895
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diff changeset
142 masterclock = MASTERCLOCK_STE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
143 masterprediv = MASTERPREDIV_STE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
144 if ((cookie_mch >> 16) == MCH_TT) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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145 masterclock = MASTERCLOCK_TT;
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diff changeset
146 masterprediv = MASTERPREDIV_TT;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
147 }
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diff changeset
148 for (i = 0; i < 4; i++) {
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149 SDL_MintAudio_AddFrequency(this,
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diff changeset
150 masterclock / (masterprediv *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
151 (1 << i)),
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diff changeset
152 masterclock, 3 - i, -1);
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diff changeset
153 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
154 break;
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diff changeset
155 case MCSN_FALCON: /* Also Mac */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
156 for (i = 1; i < 12; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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157 /* Remove unusable Falcon codec predivisors */
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diff changeset
158 if ((i == 6) || (i == 8) || (i == 10)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
159 continue;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
160 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
161 SDL_MintAudio_AddFrequency(this,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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162 MASTERCLOCK_FALCON1 /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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163 (MASTERPREDIV_FALCON * (i + 1)),
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
164 CLK25M, i + 1, -1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
165 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
166 if (cookie_mcsn->res1 != 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
167 for (i = 1; i < 4; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
168 SDL_MintAudio_AddFrequency(this,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
169 (cookie_mcsn->res1) /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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170 (MASTERPREDIV_FALCON *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
171 (1 << i)), CLKEXT,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
172 (1 << i) - 1, -1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
173 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
174 }
2060
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diff changeset
175 this->spec.format |= SDL_AUDIO_MASK_SIGNED; /* Audio is always signed */
2049
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diff changeset
176 if ((SDL_AUDIO_BITSIZE(this->spec.format)) == 16) {
2060
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diff changeset
177 this->spec.format |= SDL_AUDIO_MASK_ENDIAN; /* Audio is always big endian */
866052b01ee5 indent is evil
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diff changeset
178 this->spec.channels = 2; /* 16 bits always stereo */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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179 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
180 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
181 }
644
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182
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
183 #if 1
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
184 for (i = 0; i < MINTAUDIO_freqcount; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
185 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
186 i, MINTAUDIO_frequencies[i].frequency,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
187 MINTAUDIO_frequencies[i].masterclock,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
188 MINTAUDIO_frequencies[i].predivisor));
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diff changeset
189 }
961
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diff changeset
190 #endif
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
191
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diff changeset
192 MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, this->spec.freq);
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diff changeset
193 this->spec.freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
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diff changeset
194
2043
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
195 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
196 SDL_AUDIO_BITSIZE(this->spec.format)));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
197 DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format)));
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diff changeset
198 DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format)));
2060
866052b01ee5 indent is evil
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diff changeset
199 DEBUG_PRINT(("big endian=%d, ",
866052b01ee5 indent is evil
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diff changeset
200 SDL_AUDIO_ISBIGENDIAN(this->spec.format)));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
201 DEBUG_PRINT(("channels=%d, ", this->spec.channels));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
202 DEBUG_PRINT(("freq=%d\n", this->spec.freq));
644
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diff changeset
203
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
204 return 0;
644
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diff changeset
205 }
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
206
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
207 static void
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
208 MINTMCSN_InitAudio(_THIS)
644
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
209 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
210 int channels_mode, prediv, dmaclock;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
211 void *buffer;
644
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diff changeset
212
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
213 /* Stop currently playing sound */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
214 SDL_MintAudio_quit_thread = SDL_FALSE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
215 SDL_MintAudio_thread_finished = SDL_TRUE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
216 SDL_MintAudio_WaitThread();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
217 Buffoper(0);
644
594422ab8f9f Atari MiNT: added more audio drivers
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diff changeset
218
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
219 /* Set replay tracks */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
220 Settracks(0, 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
221 Setmontracks(0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
222
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
223 /* Select replay format */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
224 channels_mode = STEREO16;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
225 switch (SDL_AUDIO_BITSIZE(this->spec.format)) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
226 case 8:
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
227 if (this->spec.channels == 2) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
228 channels_mode = STEREO8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
229 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
230 channels_mode = MONO8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
231 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
232 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
233 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
234 if (Setmode(channels_mode) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
235 DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
236 }
644
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diff changeset
237
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
238 dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
239 prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
240 switch (cookie_mcsn->play) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
241 case MCSN_TT:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
242 Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
243 Soundcmd(SETPRESCALE, prediv);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
244 DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
245 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
246 case MCSN_FALCON:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
247 Devconnect(DMAPLAY, DAC, dmaclock, prediv, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
248 DEBUG_PRINT((DEBUG_NAME "Falcon prescaler selected\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
249 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
250 }
644
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parents:
diff changeset
251
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
252 /* Set buffer */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
253 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
254 if (Setbuffer(0, buffer, buffer + this->spec.size) < 0) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
255 DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
256 }
644
594422ab8f9f Atari MiNT: added more audio drivers
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257
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258 if (SDL_MintAudio_mint_present) {
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259 SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0);
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260 } else {
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261 /* Install interrupt */
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262 Jdisint(MFP_DMASOUND);
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263 Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);
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264 Jenabint(MFP_DMASOUND);
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265
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266 if (Setinterrupt(SI_TIMERA, SI_PLAY) < 0) {
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267 DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
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268 }
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269 }
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270
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271 /* Go */
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272 Buffoper(SB_PLA_ENA | SB_PLA_RPT);
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273 DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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274 }
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275
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276 static int
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277 MINTMCSN_OpenDevice(_THIS, const char *devname, int iscapture)
644
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278 {
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279 /* Lock sound system */
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280 if (Locksnd() != 1) {
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281 SDL_SetError("MINTMCSN_OpenDevice: Audio system already in use");
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282 return 0;
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283 }
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284
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285 SDL_MintAudio_device = this;
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286
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287 /* Check audio capabilities */
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288 if (MINTMCSN_CheckAudio(this) == -1) {
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289 return 0;
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290 }
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291
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292 /* Initialize all variables that we clean on shutdown */
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293 this->hidden = (struct SDL_PrivateAudioData *)
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294 SDL_malloc((sizeof *this->hidden));
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295 if (this->hidden == NULL) {
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296 SDL_OutOfMemory();
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297 return 0;
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298 }
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diff changeset
299 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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300
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diff changeset
301 SDL_CalculateAudioSpec(&this->spec);
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302
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303 /* Allocate memory for audio buffers in DMA-able RAM */
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304 DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", this->spec.size));
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305
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diff changeset
306 SDL_MintAudio_audiobuf[0] =
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diff changeset
307 Atari_SysMalloc(this->spec.size * 2, MX_STRAM);
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308 if (SDL_MintAudio_audiobuf[0] == NULL) {
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309 SDL_free(this->hidden);
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diff changeset
310 this->hidden = NULL;
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diff changeset
311 SDL_OutOfMemory();
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diff changeset
312 return 0;
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313 }
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314 SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + this->spec.size;
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315 SDL_MintAudio_numbuf = 0;
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316 SDL_memset(SDL_MintAudio_audiobuf[0], this->spec.silence,
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diff changeset
317 this->spec.size * 2);
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diff changeset
318 SDL_MintAudio_audiosize = this->spec.size;
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319 SDL_MintAudio_mutex = 0;
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320
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diff changeset
321 DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n",
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322 SDL_MintAudio_audiobuf[0]));
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323 DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n",
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diff changeset
324 SDL_MintAudio_audiobuf[1]));
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325
2027
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diff changeset
326 SDL_MintAudio_CheckFpu();
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diff changeset
327
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328 /* Setup audio hardware */
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diff changeset
329 MINTMCSN_InitAudio(this);
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diff changeset
330
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331 return 1; /* good to go. */
644
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332 }
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333
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diff changeset
334 static int
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diff changeset
335 MINTMCSN_Init(SDL_AudioDriverImpl * impl)
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336 {
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diff changeset
337 unsigned long dummy = 0;
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diff changeset
338
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339 SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND);
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diff changeset
340
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diff changeset
341 /* We can't use XBIOS in interrupt with Magic, don't know about thread */
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342 if (Getcookie(C_MagX, &dummy) == C_FOUND) {
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diff changeset
343 return 0;
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diff changeset
344 }
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diff changeset
345
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diff changeset
346 /* Cookie _MCH present ? if not, assume ST machine */
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347 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
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diff changeset
348 cookie_mch = MCH_ST;
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diff changeset
349 }
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diff changeset
350
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diff changeset
351 /* Cookie _SND present ? if not, assume ST machine */
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352 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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diff changeset
353 cookie_snd = SND_PSG;
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diff changeset
354 }
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diff changeset
355
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diff changeset
356 /* Check if we have 16 bits audio */
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diff changeset
357 if ((cookie_snd & SND_16BIT) == 0) {
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diff changeset
358 SDL_SetError(DEBUG_NAME "no 16-bit sound");
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diff changeset
359 return 0;
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diff changeset
360 }
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diff changeset
361
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diff changeset
362 /* Cookie MCSN present ? */
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diff changeset
363 if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) {
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diff changeset
364 SDL_SetError(DEBUG_NAME "no MCSN audio");
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diff changeset
365 return 0;
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diff changeset
366 }
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diff changeset
367
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diff changeset
368 /* Check if interrupt at end of replay */
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diff changeset
369 if (cookie_mcsn->pint == 0) {
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diff changeset
370 SDL_SetError(DEBUG_NAME "no interrupt at end of replay");
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diff changeset
371 return 0;
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diff changeset
372 }
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diff changeset
373
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diff changeset
374 /* Check if audio is lockable */
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diff changeset
375 if (Locksnd() != 1) {
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diff changeset
376 SDL_SetError(DEBUG_NAME "audio locked by other application");
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diff changeset
377 return 0;
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378 }
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379
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380 Unlocksnd();
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381
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382 DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n"));
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383
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384 /* Set the function pointers */
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385 impl->OpenDevice = MINTMCSN_OpenDevice;
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386 impl->CloseDevice = MINTMCSN_CloseDevice;
2191
29e07f91bc1f Rename LockAudio,UnlockAudio to LockDevice,UnlockDevice. Also some small fixes
Patrice Mandin <patmandin@gmail.com>
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387 impl->LockDevice = MINTMCSN_LockDevice;
29e07f91bc1f Rename LockAudio,UnlockAudio to LockDevice,UnlockDevice. Also some small fixes
Patrice Mandin <patmandin@gmail.com>
parents: 2060
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388 impl->UnlockDevice = MINTMCSN_UnlockDevice;
2049
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389 impl->OnlyHasDefaultOutputDevice = 1;
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390 impl->ProvidesOwnCallbackThread = 1;
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391 impl->SkipMixerLock = 1;
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392
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393 return 1;
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394 }
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395
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396 AudioBootStrap MINTAUDIO_MCSN_bootstrap = {
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397 MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver", MINTMCSN_Init, 0
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398 };
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399
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
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400 /* vi: set ts=4 sw=4 expandtab: */