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annotate src/audio/baudio/SDL_beaudio.cc @ 2842:97ba0be8b565

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Date: Sat, 06 Dec 2008 15:27:00 +0100 From: Couriersud Subject: SDL: Relative mouse movements The patch below will reenable processing of relative mouse movements. The DirectFB drivers generates those in "grabbed" mode. These ensure, that even in fullscreen mode relative movements are reported. SDLMAME depends on this for games with trackballs. Looking at the code I ask myself whether relative movements should be handled in the drivers (x11, directfb). Both x11 and directfb are able to report relative movements. This would leave it to the driver to use the most appropriate method for relative movements when at the border of a fullscreen window or being "grabbed".
author Sam Lantinga <slouken@libsdl.org>
date Sat, 06 Dec 2008 17:50:50 +0000
parents 866052b01ee5
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) 1997-2006 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 /* Allow access to the audio stream on BeOS */
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25
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26 #include <SoundPlayer.h>
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27
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28 #include "../../main/beos/SDL_BeApp.h"
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29
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30 extern "C"
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31 {
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32
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33 #include "SDL_audio.h"
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34 #include "../SDL_audio_c.h"
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35 #include "../SDL_sysaudio.h"
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36 #include "../../thread/beos/SDL_systhread_c.h"
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37 #include "SDL_beaudio.h"
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38
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39 }
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40
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41
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42 /* !!! FIXME: have the callback call the higher level to avoid code dupe. */
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43 /* The BeOS callback for handling the audio buffer */
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44 static void
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45 FillSound(void *device, void *stream, size_t len,
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46 const media_raw_audio_format & format)
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47 {
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48 SDL_AudioDevice *audio = (SDL_AudioDevice *) device;
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49
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50 /* Silence the buffer, since it's ours */
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51 SDL_memset(stream, audio->spec.silence, len);
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52
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53 /* Only do soemthing if audio is enabled */
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54 if (!audio->enabled)
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55 return;
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56
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57 if (!audio->paused) {
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58 if (audio->convert.needed) {
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59 SDL_mutexP(audio->mixer_lock);
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60 (*audio->spec.callback) (audio->spec.userdata,
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61 (Uint8 *) audio->convert.buf,
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62 audio->convert.len);
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63 SDL_mutexV(audio->mixer_lock);
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64 SDL_ConvertAudio(&audio->convert);
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65 SDL_memcpy(stream, audio->convert.buf, audio->convert.len_cvt);
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66 } else {
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67 SDL_mutexP(audio->mixer_lock);
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68 (*audio->spec.callback) (audio->spec.userdata,
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69 (Uint8 *) stream, len);
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70 SDL_mutexV(audio->mixer_lock);
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71 }
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72 }
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73 }
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74
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75 static void
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76 BEOSAUDIO_CloseDevice(_THIS)
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77 {
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78 if (_this->hidden != NULL) {
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79 if (_this->hidden->audio_obj) {
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80 _this->hidden->audio_obj->Stop();
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81 delete _this->hidden->audio_obj;
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82 _this->hidden->audio_obj = NULL;
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83 }
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84
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85 delete _this->hidden;
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86 _this->hidden = NULL;
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87 }
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88 }
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89
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90 static int
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91 BEOSAUDIO_OpenDevice(_THIS, const char *devname, int iscapture)
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92 {
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93 int valid_datatype = 0;
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94 media_raw_audio_format format;
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95 SDL_AudioFormat test_format = SDL_FirstAudioFormat(_this->spec.format);
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97 /* Initialize all variables that we clean on shutdown */
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98 _this->hidden = new SDL_PrivateAudioData;
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99 if (_this->hidden == NULL) {
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100 SDL_OutOfMemory();
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101 return 0;
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102 }
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103 SDL_memset(_this->hidden, 0, (sizeof *_this->hidden));
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104
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105 /* Parse the audio format and fill the Be raw audio format */
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106 SDL_memset(&format, '\0', sizeof(media_raw_audio_format));
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107 format.byte_order = B_MEDIA_LITTLE_ENDIAN;
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108 format.frame_rate = (float) _this->spec.freq;
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109 format.channel_count = _this->spec.channels; /* !!! FIXME: support > 2? */
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110 while ((!valid_datatype) && (test_format)) {
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111 valid_datatype = 1;
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112 _this->spec.format = test_format;
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113 switch (test_format) {
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114 case AUDIO_S8:
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115 format.format = media_raw_audio_format::B_AUDIO_CHAR;
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116 break;
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117
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118 case AUDIO_U8:
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119 format.format = media_raw_audio_format::B_AUDIO_UCHAR;
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120 break;
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121
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122 case AUDIO_S16LSB:
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123 format.format = media_raw_audio_format::B_AUDIO_SHORT;
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124 break;
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125
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126 case AUDIO_S16MSB:
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127 format.format = media_raw_audio_format::B_AUDIO_SHORT;
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128 format.byte_order = B_MEDIA_BIG_ENDIAN;
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129 break;
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130
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131 case AUDIO_S32LSB:
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132 format.format = media_raw_audio_format::B_AUDIO_INT;
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133 break;
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134
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135 case AUDIO_S32MSB:
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136 format.format = media_raw_audio_format::B_AUDIO_INT;
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137 format.byte_order = B_MEDIA_BIG_ENDIAN;
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138 break;
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139
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140 case AUDIO_F32LSB:
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141 format.format = media_raw_audio_format::B_AUDIO_FLOAT;
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142 break;
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143
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144 case AUDIO_F32MSB:
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145 format.format = media_raw_audio_format::B_AUDIO_FLOAT;
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146 format.byte_order = B_MEDIA_BIG_ENDIAN;
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147 break;
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148
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149 default:
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150 valid_datatype = 0;
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151 test_format = SDL_NextAudioFormat();
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152 break;
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153 }
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154 }
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155
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156 format.buffer_size = _this->spec.samples;
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157
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158 if (!valid_datatype) { /* shouldn't happen, but just in case... */
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159 BEOSAUDIO_CloseDevice(_this);
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160 SDL_SetError("Unsupported audio format");
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161 return 0;
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162 }
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163
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164 /* Calculate the final parameters for this audio specification */
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165 SDL_CalculateAudioSpec(&_this->spec);
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166
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167 /* Subscribe to the audio stream (creates a new thread) */
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168 sigset_t omask;
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169 SDL_MaskSignals(&omask);
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170 _this->hidden->audio_obj = new BSoundPlayer(&format, "SDL Audio",
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171 FillSound, NULL, _this);
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172 SDL_UnmaskSignals(&omask);
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173
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174 if (_this->hidden->audio_obj->Start() == B_NO_ERROR) {
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175 _this->hidden->audio_obj->SetHasData(true);
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176 } else {
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177 BEOSAUDIO_CloseDevice(_this);
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178 SDL_SetError("Unable to start Be audio");
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179 return 0;
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180 }
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181
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182 /* We're running! */
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183 return 1;
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184 }
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185
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186 static void
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187 BEOSAUDIO_Deinitialize(void)
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188 {
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189 SDL_QuitBeApp();
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190 }
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191
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192 static int
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193 BEOSAUDIO_Init(SDL_AudioDriverImpl * impl)
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194 {
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195 /* Initialize the Be Application, if it's not already started */
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196 if (SDL_InitBeApp() < 0) {
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197 return 0;
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198 }
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199
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200 /* Set the function pointers */
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201 impl->OpenDevice = BEOSAUDIO_OpenDevice;
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202 impl->CloseDevice = BEOSAUDIO_CloseDevice;
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203 impl->Deinitialize = BEOSAUDIO_Deinitialize;
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204 impl->ProvidesOwnCallbackThread = 1;
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205 impl->OnlyHasDefaultOutputDevice = 1;
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206
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207 return 1;
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208 }
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209
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210 extern "C"
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211 {
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212 extern AudioBootStrap BEOSAUDIO_bootstrap;
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213 }
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214 AudioBootStrap BEOSAUDIO_bootstrap = {
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215 "baudio", "BeOS BSoundPlayer", BEOSAUDIO_Init, 0
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216 };
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217
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218 /* vi: set ts=4 sw=4 expandtab: */