1 | /* |
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2 | * ORXONOX - the hottest 3D action shooter ever to exist |
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3 | * > www.orxonox.net < |
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4 | * |
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5 | * |
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6 | * License notice: |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU General Public License |
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10 | * as published by the Free Software Foundation; either version 2 |
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11 | * of the License, or (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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21 | * |
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22 | * Author: |
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23 | * Nicolas Perrenoud <nicolape_at_ee.ethz.ch> |
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24 | * Co-authors: |
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25 | * ... |
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26 | * |
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27 | */ |
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28 | #include "AudioStream.h" |
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29 | |
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30 | #include "util/Debug.h" |
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31 | #include "util/Error.h" |
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32 | |
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33 | namespace audio |
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34 | { |
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35 | AudioStream::AudioStream(std::string path) |
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36 | { |
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37 | this->path = path; |
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38 | loaded = false; |
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39 | } |
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40 | |
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41 | void AudioStream::open() |
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42 | { |
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43 | int result; |
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44 | |
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45 | oggFile = fopen(path.c_str(), "rb"); |
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46 | if(!oggFile) |
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47 | { |
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48 | orxonox::Error("Could not open Ogg file "+path); |
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49 | return; |
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50 | } |
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51 | |
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52 | if((result = ov_open(oggFile, &oggStream, NULL, 0)) < 0) |
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53 | { |
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54 | fclose(oggFile); |
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55 | orxonox::Error("Could not open Ogg stream. " + errorString(result)); |
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56 | return; |
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57 | } |
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58 | |
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59 | loaded = true; |
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60 | |
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61 | vorbisInfo = ov_info(&oggStream, -1); |
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62 | vorbisComment = ov_comment(&oggStream, -1); |
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63 | |
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64 | if(vorbisInfo->channels == 1) |
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65 | format = AL_FORMAT_MONO16; |
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66 | else |
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67 | format = AL_FORMAT_STEREO16; |
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68 | |
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69 | |
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70 | alGenBuffers(2, buffers); |
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71 | check(); |
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72 | alGenSources(1, &source); |
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73 | check(); |
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74 | |
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75 | alSource3f(source, AL_POSITION, 0.0, 0.0, 0.0); |
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76 | alSource3f(source, AL_VELOCITY, 0.0, 0.0, 0.0); |
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77 | alSource3f(source, AL_DIRECTION, 0.0, 0.0, 0.0); |
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78 | alSourcef (source, AL_ROLLOFF_FACTOR, 0.0 ); |
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79 | alSourcei (source, AL_SOURCE_RELATIVE, AL_FALSE ); |
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80 | } |
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81 | |
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82 | |
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83 | |
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84 | |
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85 | void AudioStream::release() |
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86 | { |
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87 | |
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88 | alSourceStop(source); |
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89 | empty(); |
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90 | alDeleteSources(1, &source); |
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91 | check(); |
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92 | alDeleteBuffers(1, buffers); |
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93 | check(); |
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94 | |
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95 | ov_clear(&oggStream); |
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96 | loaded = false; |
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97 | |
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98 | } |
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99 | |
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100 | |
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101 | |
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102 | |
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103 | void AudioStream::display() |
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104 | { |
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105 | if (loaded) |
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106 | { |
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107 | COUT(3) |
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108 | << "version " << vorbisInfo->version << std::endl |
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109 | << "channels " << vorbisInfo->channels << std::endl |
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110 | << "rate (hz) " << vorbisInfo->rate << std::endl |
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111 | << "bitrate upper " << vorbisInfo->bitrate_upper << std::endl |
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112 | << "bitrate nominal " << vorbisInfo->bitrate_nominal << std::endl |
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113 | << "bitrate lower " << vorbisInfo->bitrate_lower << std::endl |
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114 | << "bitrate window " << vorbisInfo->bitrate_window << std::endl |
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115 | << std::endl |
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116 | << "vendor " << vorbisComment->vendor << std::endl; |
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117 | |
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118 | for(int i = 0; i < vorbisComment->comments; i++) |
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119 | { |
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120 | COUT(3) << " " << vorbisComment->user_comments[i] << std::endl; |
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121 | } |
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122 | |
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123 | COUT(3) << std::endl; |
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124 | } |
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125 | } |
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126 | |
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127 | |
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128 | |
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129 | |
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130 | bool AudioStream::playback() |
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131 | { |
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132 | if (!loaded) |
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133 | { |
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134 | return false; |
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135 | } |
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136 | |
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137 | if(playing()) |
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138 | return true; |
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139 | |
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140 | if(!stream(buffers[0])) |
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141 | return false; |
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142 | |
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143 | if(!stream(buffers[1])) |
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144 | return false; |
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145 | |
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146 | alSourceQueueBuffers(source, 2, buffers); |
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147 | alSourcePlay(source); |
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148 | |
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149 | return true; |
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150 | } |
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151 | |
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152 | |
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153 | |
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154 | |
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155 | bool AudioStream::playing() |
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156 | { |
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157 | if (!loaded) |
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158 | { |
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159 | return false; |
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160 | } |
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161 | |
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162 | ALenum state; |
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163 | alGetSourcei(source, AL_SOURCE_STATE, &state); |
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164 | return (state == AL_PLAYING); |
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165 | } |
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166 | |
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167 | |
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168 | |
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169 | |
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170 | bool AudioStream::update() |
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171 | { |
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172 | int processed; |
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173 | bool active = true; |
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174 | |
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175 | alGetSourcei(source, AL_BUFFERS_PROCESSED, &processed); |
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176 | |
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177 | while(processed--) |
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178 | { |
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179 | ALuint buffer; |
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180 | |
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181 | alSourceUnqueueBuffers(source, 1, &buffer); |
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182 | check(); |
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183 | |
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184 | active = stream(buffer); |
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185 | |
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186 | alSourceQueueBuffers(source, 1, &buffer); |
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187 | check(); |
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188 | } |
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189 | |
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190 | if (active==false) |
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191 | { |
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192 | loaded = false; |
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193 | } |
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194 | return active; |
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195 | } |
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196 | |
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197 | |
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198 | |
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199 | |
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200 | bool AudioStream::stream(ALuint buffer) |
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201 | { |
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202 | char pcm[BUFFER_SIZE]; |
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203 | int size = 0; |
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204 | int section; |
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205 | int result; |
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206 | |
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207 | while(size < BUFFER_SIZE) |
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208 | { |
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209 | result = ov_read(&oggStream, pcm + size, BUFFER_SIZE - size, 0, 2, 1, §ion); |
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210 | |
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211 | if(result > 0) |
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212 | size += result; |
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213 | else |
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214 | if(result < 0) |
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215 | orxonox::Error(errorString(result)); |
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216 | else |
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217 | break; |
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218 | } |
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219 | |
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220 | if(size == 0) |
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221 | return false; |
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222 | |
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223 | alBufferData(buffer, format, pcm, size, vorbisInfo->rate); |
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224 | check(); |
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225 | |
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226 | return true; |
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227 | } |
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228 | |
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229 | |
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230 | |
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231 | void AudioStream::empty() |
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232 | { |
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233 | int queued; |
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234 | |
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235 | alGetSourcei(source, AL_BUFFERS_QUEUED, &queued); |
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236 | |
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237 | while(queued--) |
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238 | { |
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239 | ALuint buffer; |
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240 | |
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241 | alSourceUnqueueBuffers(source, 1, &buffer); |
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242 | check(); |
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243 | } |
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244 | } |
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245 | |
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246 | |
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247 | |
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248 | |
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249 | void AudioStream::check() |
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250 | { |
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251 | int error = alGetError(); |
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252 | |
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253 | if(error != AL_NO_ERROR) |
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254 | orxonox::Error("OpenAL error was raised."); |
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255 | } |
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256 | |
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257 | |
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258 | |
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259 | std::string AudioStream::errorString(int code) |
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260 | { |
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261 | switch(code) |
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262 | { |
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263 | case OV_EREAD: |
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264 | return std::string("Read from media."); |
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265 | case OV_ENOTVORBIS: |
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266 | return std::string("Not Vorbis data."); |
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267 | case OV_EVERSION: |
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268 | return std::string("Vorbis version mismatch."); |
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269 | case OV_EBADHEADER: |
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270 | return std::string("Invalid Vorbis header."); |
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271 | case OV_EFAULT: |
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272 | return std::string("Internal logic fault (bug or heap/stack corruption."); |
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273 | default: |
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274 | return std::string("Unknown Ogg error."); |
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275 | } |
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276 | } |
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277 | } |
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278 | |
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