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0
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1 /*
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2 AIX support for the SDL - Simple DirectMedia Layer
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3 Copyright (C) 2000 Carsten Griwodz
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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 Carsten Griwodz
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20 griff@kom.tu-darmstadt.de
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21
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22 based on linux/SDL_dspaudio.c by Sam Lantinga
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23 */
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24
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25 #ifdef SAVE_RCSID
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26 static char rcsid =
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27 "@(#) $Id$";
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28 #endif
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29
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30 /* Allow access to a raw mixing buffer */
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31
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32 #include <stdlib.h>
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33 #include <stdio.h>
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34 #include <string.h>
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35 #include <errno.h>
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36 #include <unistd.h>
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37 #include <fcntl.h>
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38 #include <sys/types.h>
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39 #include <sys/time.h>
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40 #include <sys/ioctl.h>
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41 #include <sys/stat.h>
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42 #include <sys/mman.h>
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43
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44 #include "SDL_audio.h"
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45 #include "SDL_error.h"
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46 #include "SDL_audio_c.h"
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47 #include "SDL_audiodev_c.h"
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48 #include "SDL_umsaudio.h"
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49
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50 /* The tag name used by UMS audio */
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51 #define UMS_DRIVER_NAME "ums"
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52
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53 #define DEBUG_AUDIO 1
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54
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55 /* Audio driver functions */
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56 static int UMS_OpenAudio(_THIS, SDL_AudioSpec *spec);
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57 static void UMS_PlayAudio(_THIS);
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58 static Uint8 *UMS_GetAudioBuf(_THIS);
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59 static void UMS_CloseAudio(_THIS);
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60
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61 static UMSAudioDevice_ReturnCode UADOpen(_THIS, string device, string mode, long flags);
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62 static UMSAudioDevice_ReturnCode UADClose(_THIS);
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63 static UMSAudioDevice_ReturnCode UADGetBitsPerSample(_THIS, long* bits);
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64 static UMSAudioDevice_ReturnCode UADSetBitsPerSample(_THIS, long bits);
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65 static UMSAudioDevice_ReturnCode UADSetSampleRate(_THIS, long rate, long* set_rate);
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66 static UMSAudioDevice_ReturnCode UADSetByteOrder(_THIS, string byte_order);
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67 static UMSAudioDevice_ReturnCode UADSetAudioFormatType(_THIS, string fmt);
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68 static UMSAudioDevice_ReturnCode UADSetNumberFormat(_THIS, string fmt);
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69 static UMSAudioDevice_ReturnCode UADInitialize(_THIS);
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70 static UMSAudioDevice_ReturnCode UADStart(_THIS);
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71 static UMSAudioDevice_ReturnCode UADStop(_THIS);
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72 static UMSAudioDevice_ReturnCode UADSetTimeFormat(_THIS, UMSAudioTypes_TimeFormat fmt );
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73 static UMSAudioDevice_ReturnCode UADWriteBuffSize(_THIS, long* buff_size );
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74 static UMSAudioDevice_ReturnCode UADWriteBuffRemain(_THIS, long* buff_size );
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75 static UMSAudioDevice_ReturnCode UADWriteBuffUsed(_THIS, long* buff_size );
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76 static UMSAudioDevice_ReturnCode UADSetDMABufferSize(_THIS, long bytes, long* bytes_ret );
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77 static UMSAudioDevice_ReturnCode UADSetVolume(_THIS, long volume );
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78 static UMSAudioDevice_ReturnCode UADSetBalance(_THIS, long balance );
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79 static UMSAudioDevice_ReturnCode UADSetChannels(_THIS, long channels );
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80 static UMSAudioDevice_ReturnCode UADPlayRemainingData(_THIS, boolean block );
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81 static UMSAudioDevice_ReturnCode UADEnableOutput(_THIS, string output, long* left_gain, long* right_gain);
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82 static UMSAudioDevice_ReturnCode UADWrite(_THIS, UMSAudioTypes_Buffer* buff, long samples, long* samples_written);
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83
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84 /* Audio driver bootstrap functions */
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85 static int Audio_Available(void)
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86 {
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87 return 1;
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88 }
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89
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90 static void Audio_DeleteDevice(_THIS)
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91 {
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92 if(this->hidden->playbuf._buffer) free(this->hidden->playbuf._buffer);
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93 if(this->hidden->fillbuf._buffer) free(this->hidden->fillbuf._buffer);
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94 _somFree( this->hidden->umsdev );
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95 free(this->hidden);
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96 free(this);
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97 }
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98
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99 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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100 {
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101 SDL_AudioDevice *this;
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102
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103 /*
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104 * Allocate and initialize management storage and private management
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105 * storage for this SDL-using library.
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106 */
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107 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
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108 if ( this ) {
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109 memset(this, 0, (sizeof *this));
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110 this->hidden = (struct SDL_PrivateAudioData *)malloc((sizeof *this->hidden));
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111 }
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112 if ( (this == NULL) || (this->hidden == NULL) ) {
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113 SDL_OutOfMemory();
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114 if ( this ) {
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115 free(this);
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116 }
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117 return(0);
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118 }
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119 memset(this->hidden, 0, (sizeof *this->hidden));
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120 #ifdef DEBUG_AUDIO
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121 fprintf(stderr, "Creating UMS Audio device\n");
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122 #endif
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123
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124 /*
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125 * Calls for UMS env initialization and audio object construction.
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126 */
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127 this->hidden->ev = somGetGlobalEnvironment();
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128 this->hidden->umsdev = UMSAudioDeviceNew();
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129
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130 /*
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131 * Set the function pointers.
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132 */
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133 this->OpenAudio = UMS_OpenAudio;
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134 this->WaitAudio = NULL; /* we do blocking output */
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135 this->PlayAudio = UMS_PlayAudio;
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136 this->GetAudioBuf = UMS_GetAudioBuf;
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137 this->CloseAudio = UMS_CloseAudio;
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138 this->free = Audio_DeleteDevice;
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139
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140 #ifdef DEBUG_AUDIO
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141 fprintf(stderr, "done\n");
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142 #endif
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143 return this;
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144 }
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145
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146 AudioBootStrap UMS_bootstrap = {
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147 UMS_DRIVER_NAME, "AUX UMS audio",
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148 Audio_Available, Audio_CreateDevice
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149 };
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150
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151 static Uint8 *UMS_GetAudioBuf(_THIS)
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152 {
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153 #ifdef DEBUG_AUDIO
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154 fprintf(stderr, "enter UMS_GetAudioBuf\n");
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155 #endif
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156 return this->hidden->fillbuf._buffer;
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157 /*
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158 long bufSize;
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159 UMSAudioDevice_ReturnCode rc;
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160
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161 rc = UADSetTimeFormat(this, UMSAudioTypes_Bytes );
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162 rc = UADWriteBuffSize(this, bufSize );
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163 */
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164 }
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165
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166 static void UMS_CloseAudio(_THIS)
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167 {
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168 UMSAudioDevice_ReturnCode rc;
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169
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170 #ifdef DEBUG_AUDIO
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171 fprintf(stderr, "enter UMS_CloseAudio\n");
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172 #endif
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173 rc = UADPlayRemainingData(this, TRUE);
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174 rc = UADStop(this);
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175 rc = UADClose(this);
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176 }
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177
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178 static void UMS_PlayAudio(_THIS)
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179 {
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180 UMSAudioDevice_ReturnCode rc;
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181 long samplesToWrite;
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182 long samplesWritten;
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183 UMSAudioTypes_Buffer swpbuf;
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184
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185 #ifdef DEBUG_AUDIO
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186 fprintf(stderr, "enter UMS_PlayAudio\n");
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187 #endif
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188 samplesToWrite = this->hidden->playbuf._length/this->hidden->bytesPerSample;
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189 do
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190 {
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191 rc = UADWrite(this, &this->hidden->playbuf,
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192 samplesToWrite,
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193 &samplesWritten );
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194 samplesToWrite -= samplesWritten;
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195
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196 /* rc values: UMSAudioDevice_Success
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197 * UMSAudioDevice_Failure
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198 * UMSAudioDevice_Preempted
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199 * UMSAudioDevice_Interrupted
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200 * UMSAudioDevice_DeviceError
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201 */
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202 if ( rc == UMSAudioDevice_DeviceError ) {
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203 #ifdef DEBUG_AUDIO
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204 fprintf(stderr, "Returning from PlayAudio with devices error\n");
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205 #endif
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206 return;
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207 }
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208 }
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209 while(samplesToWrite>0);
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210
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211 SDL_LockAudio();
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212 memcpy( &swpbuf, &this->hidden->playbuf, sizeof(UMSAudioTypes_Buffer) );
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213 memcpy( &this->hidden->playbuf, &this->hidden->fillbuf, sizeof(UMSAudioTypes_Buffer) );
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214 memcpy( &this->hidden->fillbuf, &swpbuf, sizeof(UMSAudioTypes_Buffer) );
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215 SDL_UnlockAudio();
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216
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217 #ifdef DEBUG_AUDIO
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218 fprintf(stderr, "Wrote audio data and swapped buffer\n");
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219 #endif
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220 }
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221
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222 #if 0
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223 // /* Set the DSP frequency */
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224 // value = spec->freq;
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225 // if ( ioctl(this->hidden->audio_fd, SOUND_PCM_WRITE_RATE, &value) < 0 ) {
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226 // SDL_SetError("Couldn't set audio frequency");
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227 // return(-1);
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228 // }
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229 // spec->freq = value;
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230 #endif
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231
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232 static int UMS_OpenAudio(_THIS, SDL_AudioSpec *spec)
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233 {
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234 char* audiodev = "/dev/paud0";
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235 long lgain;
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236 long rgain;
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237 long outRate;
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238 long outBufSize;
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239 long bitsPerSample;
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240 long samplesPerSec;
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241 long success;
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242 Uint16 test_format;
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243 int frag_spec;
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244 UMSAudioDevice_ReturnCode rc;
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245
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246 #ifdef DEBUG_AUDIO
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247 fprintf(stderr, "enter UMS_OpenAudio\n");
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248 #endif
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249 rc = UADOpen(this, audiodev,"PLAY", UMSAudioDevice_BlockingIO);
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250 if ( rc != UMSAudioDevice_Success ) {
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251 SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno));
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252 return -1;
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253 }
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254
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255 rc = UADSetAudioFormatType(this, "PCM");
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256
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257 success = 0;
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258 test_format = SDL_FirstAudioFormat(spec->format);
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259 do
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260 {
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261 #ifdef DEBUG_AUDIO
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262 fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
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263 #endif
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264 switch ( test_format )
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265 {
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266 case AUDIO_U8:
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267 /* from the mac code: better ? */
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268 /* sample_bits = spec->size / spec->samples / spec->channels * 8; */
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269 success = 1;
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270 bitsPerSample = 8;
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271 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
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272 rc = UADSetByteOrder(this, "MSB"); /* irrelevant */
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273 rc = UADSetNumberFormat(this, "UNSIGNED");
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274 break;
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275 case AUDIO_S8:
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276 success = 1;
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277 bitsPerSample = 8;
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278 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
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279 rc = UADSetByteOrder(this, "MSB"); /* irrelevant */
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280 rc = UADSetNumberFormat(this, "SIGNED");
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281 break;
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282 case AUDIO_S16LSB:
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283 success = 1;
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284 bitsPerSample = 16;
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285 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
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286 rc = UADSetByteOrder(this, "LSB");
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287 rc = UADSetNumberFormat(this, "SIGNED");
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288 break;
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289 case AUDIO_S16MSB:
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290 success = 1;
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291 bitsPerSample = 16;
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292 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
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293 rc = UADSetByteOrder(this, "MSB");
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294 rc = UADSetNumberFormat(this, "SIGNED");
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295 break;
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296 case AUDIO_U16LSB:
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297 success = 1;
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298 bitsPerSample = 16;
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299 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
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300 rc = UADSetByteOrder(this, "LSB");
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301 rc = UADSetNumberFormat(this, "UNSIGNED");
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302 break;
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303 case AUDIO_U16MSB:
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304 success = 1;
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305 bitsPerSample = 16;
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306 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
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307 rc = UADSetByteOrder(this, "MSB");
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308 rc = UADSetNumberFormat(this, "UNSIGNED");
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309 break;
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310 default:
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311 break;
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312 }
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313 if ( ! success ) {
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314 test_format = SDL_NextAudioFormat();
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315 }
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316 }
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317 while ( ! success && test_format );
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318
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319 if ( success == 0 ) {
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320 SDL_SetError("Couldn't find any hardware audio formats");
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321 return -1;
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322 }
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323
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324 spec->format = test_format;
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325
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326 for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec );
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327 if ( (0x01<<frag_spec) != spec->size ) {
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328 SDL_SetError("Fragment size must be a power of two");
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329 return -1;
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330 }
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331 if ( frag_spec > 2048 ) frag_spec = 2048;
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332
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333 this->hidden->bytesPerSample = (bitsPerSample / 8) * spec->channels;
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334 samplesPerSec = this->hidden->bytesPerSample * outRate;
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335
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336 this->hidden->playbuf._length = 0;
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337 this->hidden->playbuf._maximum = spec->size;
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338 this->hidden->playbuf._buffer = (unsigned char*)malloc(spec->size);
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339 this->hidden->fillbuf._length = 0;
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340 this->hidden->fillbuf._maximum = spec->size;
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341 this->hidden->fillbuf._buffer = (unsigned char*)malloc(spec->size);
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342
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343 rc = UADSetBitsPerSample(this, bitsPerSample );
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344 rc = UADSetDMABufferSize(this, frag_spec, &outBufSize );
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345 rc = UADSetChannels(this, spec->channels); /* functions reduces to mono or stereo */
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346
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347 lgain = 100; /*maximum left input gain*/
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348 rgain = 100; /*maimum right input gain*/
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349 rc = UADEnableOutput(this, "LINE_OUT",&lgain,&rgain);
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350 rc = UADInitialize(this);
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351 rc = UADStart(this);
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352 rc = UADSetVolume(this, 100);
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353 rc = UADSetBalance(this, 0);
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354
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355 /* We're ready to rock and roll. :-) */
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356 return 0;
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357 }
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358
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359
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360 static UMSAudioDevice_ReturnCode UADGetBitsPerSample(_THIS, long* bits)
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361 {
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362 return UMSAudioDevice_get_bits_per_sample( this->hidden->umsdev,
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363 this->hidden->ev,
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364 bits );
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365 }
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366
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367 static UMSAudioDevice_ReturnCode UADSetBitsPerSample(_THIS, long bits)
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368 {
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369 return UMSAudioDevice_set_bits_per_sample( this->hidden->umsdev,
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370 this->hidden->ev,
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371 bits );
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372 }
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373
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374 static UMSAudioDevice_ReturnCode UADSetSampleRate(_THIS, long rate, long* set_rate)
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375 {
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376 /* from the mac code: sample rate = spec->freq << 16; */
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377 return UMSAudioDevice_set_sample_rate( this->hidden->umsdev,
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378 this->hidden->ev,
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379 rate,
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380 set_rate );
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381 }
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382
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383 static UMSAudioDevice_ReturnCode UADSetByteOrder(_THIS, string byte_order)
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384 {
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385 return UMSAudioDevice_set_byte_order( this->hidden->umsdev,
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386 this->hidden->ev,
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387 byte_order );
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388 }
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389
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390 static UMSAudioDevice_ReturnCode UADSetAudioFormatType(_THIS, string fmt)
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391 {
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392 /* possible PCM, A_LAW or MU_LAW */
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393 return UMSAudioDevice_set_audio_format_type( this->hidden->umsdev,
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394 this->hidden->ev,
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395 fmt );
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396 }
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397
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398 static UMSAudioDevice_ReturnCode UADSetNumberFormat(_THIS, string fmt)
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399 {
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400 /* possible SIGNED, UNSIGNED, or TWOS_COMPLEMENT */
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401 return UMSAudioDevice_set_number_format( this->hidden->umsdev,
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402 this->hidden->ev,
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403 fmt );
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404 }
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405
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406 static UMSAudioDevice_ReturnCode UADInitialize(_THIS)
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407 {
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408 return UMSAudioDevice_initialize( this->hidden->umsdev,
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409 this->hidden->ev );
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410 }
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411
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412 static UMSAudioDevice_ReturnCode UADStart(_THIS)
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413 {
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414 return UMSAudioDevice_start( this->hidden->umsdev,
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415 this->hidden->ev );
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416 }
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417
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418 static UMSAudioDevice_ReturnCode UADSetTimeFormat(_THIS, UMSAudioTypes_TimeFormat fmt )
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419 {
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420 /*
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421 * Switches the time format to the new format, immediately.
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422 * possible UMSAudioTypes_Msecs, UMSAudioTypes_Bytes or UMSAudioTypes_Samples
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423 */
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424 return UMSAudioDevice_set_time_format( this->hidden->umsdev,
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425 this->hidden->ev,
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426 fmt );
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427 }
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428
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429 static UMSAudioDevice_ReturnCode UADWriteBuffSize(_THIS, long* buff_size )
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430 {
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431 /*
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432 * returns write buffer size in the current time format
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433 */
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434 return UMSAudioDevice_write_buff_size( this->hidden->umsdev,
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435 this->hidden->ev,
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436 buff_size );
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437 }
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438
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439 static UMSAudioDevice_ReturnCode UADWriteBuffRemain(_THIS, long* buff_size )
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440 {
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441 /*
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442 * returns amount of available space in the write buffer
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443 * in the current time format
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444 */
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445 return UMSAudioDevice_write_buff_remain( this->hidden->umsdev,
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446 this->hidden->ev,
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447 buff_size );
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448 }
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449
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450 static UMSAudioDevice_ReturnCode UADWriteBuffUsed(_THIS, long* buff_size )
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451 {
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452 /*
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453 * returns amount of filled space in the write buffer
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454 * in the current time format
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455 */
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456 return UMSAudioDevice_write_buff_used( this->hidden->umsdev,
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457 this->hidden->ev,
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458 buff_size );
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459 }
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460
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461 static UMSAudioDevice_ReturnCode UADSetDMABufferSize(_THIS, long bytes, long* bytes_ret )
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462 {
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463 /*
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464 * Request a new DMA buffer size, maximum requested size 2048.
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465 * Takes effect with next initialize() call.
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466 * Devices may or may not support DMA.
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467 */
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468 return UMSAudioDevice_set_DMA_buffer_size( this->hidden->umsdev,
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469 this->hidden->ev,
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470 bytes,
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471 bytes_ret );
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472 }
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473
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474 static UMSAudioDevice_ReturnCode UADSetVolume(_THIS, long volume )
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475 {
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476 /*
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477 * Set the volume.
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478 * Takes effect immediately.
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479 */
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480 return UMSAudioDevice_set_volume( this->hidden->umsdev,
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481 this->hidden->ev,
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482 volume );
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483 }
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484
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485 static UMSAudioDevice_ReturnCode UADSetBalance(_THIS, long balance )
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486 {
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487 /*
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488 * Set the balance.
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489 * Takes effect immediately.
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490 */
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491 return UMSAudioDevice_set_balance( this->hidden->umsdev,
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492 this->hidden->ev,
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493 balance );
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494 }
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495
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496 static UMSAudioDevice_ReturnCode UADSetChannels(_THIS, long channels )
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497 {
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498 /*
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499 * Set mono or stereo.
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500 * Takes effect with next initialize() call.
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501 */
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502 if ( channels != 1 ) channels = 2;
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503 return UMSAudioDevice_set_number_of_channels( this->hidden->umsdev,
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504 this->hidden->ev,
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505 channels );
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506 }
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507
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508 static UMSAudioDevice_ReturnCode UADOpen(_THIS, string device, string mode, long flags)
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509 {
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510 return UMSAudioDevice_open( this->hidden->umsdev,
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511 this->hidden->ev,
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512 device,
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513 mode,
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514 flags );
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515 }
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516
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517 static UMSAudioDevice_ReturnCode UADWrite(_THIS, UMSAudioTypes_Buffer* buff,
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518 long samples,
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519 long* samples_written)
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520 {
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521 return UMSAudioDevice_write( this->hidden->umsdev,
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522 this->hidden->ev,
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523 buff,
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524 samples,
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525 samples_written );
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526 }
|
|
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527
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528 static UMSAudioDevice_ReturnCode UADPlayRemainingData(_THIS, boolean block )
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529 {
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530 return UMSAudioDevice_play_remaining_data( this->hidden->umsdev,
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531 this->hidden->ev,
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532 block);
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533 }
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534
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535 static UMSAudioDevice_ReturnCode UADStop(_THIS)
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536 {
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537 return UMSAudioDevice_stop( this->hidden->umsdev,
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538 this->hidden->ev );
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539 }
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540
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541 static UMSAudioDevice_ReturnCode UADClose(_THIS)
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542 {
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543 return UMSAudioDevice_close( this->hidden->umsdev,
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544 this->hidden->ev );
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|
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545 }
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546
|
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547 static UMSAudioDevice_ReturnCode UADEnableOutput(_THIS, string output, long* left_gain, long* right_gain)
|
|
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548 {
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|
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549 return UMSAudioDevice_enable_output( this->hidden->umsdev,
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550 this->hidden->ev,
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551 output,
|
|
|
552 left_gain,
|
|
|
553 right_gain );
|
|
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554 }
|
|
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555
|
