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annotate src/audio/android/SDL_androidaudio.c @ 5006:8e8876e4aec6

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Include windows.h in SDL_atomic.h by default, but don't include the atomic API in SDL.h This allows all SDL code to take advantage of the atomic intrinsics on Windows, but doesn't cause applications just including SDL.h to pull in windows.h
author Sam Lantinga <slouken@libsdl.org>
date Sun, 16 Jan 2011 17:45:42 -0800
parents 8d7315668e35
children 327f181542f1
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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 /* Output audio to Android */
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25
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26 #include "SDL_audio.h"
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27 #include "../SDL_audio_c.h"
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28 #include "SDL_androidaudio.h"
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29
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30 #include "../../SDL_android.h"
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31
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32 #include <android/log.h>
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33
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34 static void * audioDevice;
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35
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36 static int
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37 AndroidAUD_OpenDevice(_THIS, const char *devname, int iscapture)
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38 {
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39 SDL_AudioFormat test_format;
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40 int valid_datatype = 0;
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41
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42 if (iscapture) {
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43 //TODO: implement capture
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44 SDL_SetError("Capture not supported on Android");
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45 return 0;
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46 }
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47
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48 if (audioDevice != NULL) {
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49 SDL_SetError("Only one audio device at a time please!");
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50 return 0;
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51 }
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52
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53 audioDevice = this;
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54
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55 this->hidden = SDL_malloc(sizeof(*(this->hidden)));
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56 if (!this->hidden) {
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57 SDL_OutOfMemory();
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58 return 0;
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59 }
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60 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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61
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62 test_format = SDL_FirstAudioFormat(this->spec.format);
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63 while (test_format != 0) { // no "UNKNOWN" constant
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64 if ((test_format == AUDIO_U8) || (test_format == AUDIO_S16LSB)) {
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65 this->spec.format = test_format;
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66 break;
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67 }
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68 test_format = SDL_NextAudioFormat();
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69 }
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70
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71 if (test_format == 0) {
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72 // Didn't find a compatible format :(
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73 SDL_SetError("No compatible audio format!");
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74 return 0;
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75 }
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76
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77 if (this->spec.channels > 1) {
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78 this->spec.channels = 2;
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79 } else {
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80 this->spec.channels = 1;
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81 }
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82
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83 if (this->spec.freq < 8000) {
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84 this->spec.freq = 8000;
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85 }
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86 if (this->spec.freq > 48000) {
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87 this->spec.freq = 48000;
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88 }
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89
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90 // TODO: pass in/return a (Java) device ID, also whether we're opening for input or output
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91 this->spec.samples = Android_JNI_OpenAudioDevice(this->spec.freq, this->spec.format == AUDIO_U8 ? 0 : 1, this->spec.channels, this->spec.samples);
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92 SDL_CalculateAudioSpec(&this->spec);
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93
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94 if (this->spec.samples == 0) {
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95 // Init failed?
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96 SDL_SetError("Java-side initialization failed!");
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97 return 0;
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98 }
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99
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100 return 1;
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101 }
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102
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103 static void
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104 AndroidAUD_PlayDevice(_THIS)
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105 {
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106 Android_JNI_WriteAudioBuffer();
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107 }
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108
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109 static Uint8 *
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110 AndroidAUD_GetDeviceBuf(_THIS)
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111 {
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112 return Android_JNI_GetAudioBuffer();
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113 }
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114
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115 static void
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116 AndroidAUD_CloseDevice(_THIS)
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117 {
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118 if (this->hidden != NULL) {
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119 SDL_free(this->hidden);
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120 this->hidden = NULL;
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121 }
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122 Android_JNI_CloseAudioDevice();
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123
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124 if (audioDevice == this) {
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125 audioDevice = NULL;
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126 }
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127 }
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128
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129 static int
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130 AndroidAUD_Init(SDL_AudioDriverImpl * impl)
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131 {
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132 /* Set the function pointers */
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133 impl->OpenDevice = AndroidAUD_OpenDevice;
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134 impl->PlayDevice = AndroidAUD_PlayDevice;
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135 impl->GetDeviceBuf = AndroidAUD_GetDeviceBuf;
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136 impl->CloseDevice = AndroidAUD_CloseDevice;
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137
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138 /* and the capabilities */
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139 impl->ProvidesOwnCallbackThread = 1;
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140 impl->HasCaptureSupport = 0; //TODO
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141 impl->OnlyHasDefaultOutputDevice = 1;
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142 impl->OnlyHasDefaultInputDevice = 1;
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143
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144 return 1; /* this audio target is available. */
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145 }
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146
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147 AudioBootStrap ANDROIDAUD_bootstrap = {
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148 "android", "SDL Android audio driver", AndroidAUD_Init, 0 /*1? */
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149 };
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150
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151 /* Called by the Java code to start the audio processing on a thread */
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152 void
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Sam Lantinga <slouken@libsdl.org>
parents: 4989
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153 Android_RunAudioThread()
9f9bea41e88f Working audio implementation contributed by Joseph Lunderville
Sam Lantinga <slouken@libsdl.org>
parents: 4989
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154 {
9f9bea41e88f Working audio implementation contributed by Joseph Lunderville
Sam Lantinga <slouken@libsdl.org>
parents: 4989
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155 SDL_RunAudio(audioDevice);
9f9bea41e88f Working audio implementation contributed by Joseph Lunderville
Sam Lantinga <slouken@libsdl.org>
parents: 4989
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156 }
9f9bea41e88f Working audio implementation contributed by Joseph Lunderville
Sam Lantinga <slouken@libsdl.org>
parents: 4989
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157
4718
79aa6c61f33b Added stub android sound system
Paul Hunkin <paul@bieh.net>
parents:
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158 /* vi: set ts=4 sw=4 expandtab: */