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151 /*@}*/ |
151 /*@}*/ |
152 |
152 |
153 /*@}*//*Audio flags*/ |
153 /*@}*//*Audio flags*/ |
154 |
154 |
155 /** |
155 /** |
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156 * This function is called when the audio device needs more data. |
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157 * |
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158 * \param userdata An application-specific parameter saved in |
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159 * the SDL_AudioSpec structure |
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160 * \param stream A pointer to the audio data buffer. |
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161 * \param len The length of that buffer in bytes. |
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162 * |
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163 * Once the callback returns, the buffer will no longer be valid. |
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164 * Stereo samples are stored in a LRLRLR ordering. |
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165 */ |
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166 typedef void (SDLCALL * SDL_AudioCallback) (void *userdata, Uint8 * stream, |
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167 int len); |
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168 |
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169 /** |
156 * The calculated values in this structure are calculated by SDL_OpenAudio(). |
170 * The calculated values in this structure are calculated by SDL_OpenAudio(). |
157 */ |
171 */ |
158 typedef struct SDL_AudioSpec |
172 typedef struct SDL_AudioSpec |
159 { |
173 { |
160 int freq; /**< DSP frequency -- samples per second */ |
174 int freq; /**< DSP frequency -- samples per second */ |
162 Uint8 channels; /**< Number of channels: 1 mono, 2 stereo */ |
176 Uint8 channels; /**< Number of channels: 1 mono, 2 stereo */ |
163 Uint8 silence; /**< Audio buffer silence value (calculated) */ |
177 Uint8 silence; /**< Audio buffer silence value (calculated) */ |
164 Uint16 samples; /**< Audio buffer size in samples (power of 2) */ |
178 Uint16 samples; /**< Audio buffer size in samples (power of 2) */ |
165 Uint16 padding; /**< Necessary for some compile environments */ |
179 Uint16 padding; /**< Necessary for some compile environments */ |
166 Uint32 size; /**< Audio buffer size in bytes (calculated) */ |
180 Uint32 size; /**< Audio buffer size in bytes (calculated) */ |
167 /** |
181 SDL_AudioCallback callback; |
168 * This function is called when the audio device needs more data. |
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169 * |
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170 * \param stream A pointer to the audio data buffer. |
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171 * \param len The length of that buffer in bytes. |
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172 * |
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173 * Once the callback returns, the buffer will no longer be valid. |
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174 * Stereo samples are stored in a LRLRLR ordering. |
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175 */ |
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176 void (SDLCALL * callback) (void *userdata, Uint8 * stream, int len); |
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177 void *userdata; |
182 void *userdata; |
178 } SDL_AudioSpec; |
183 } SDL_AudioSpec; |
179 |
184 |
180 |
185 |
181 struct SDL_AudioCVT; |
186 struct SDL_AudioCVT; |