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242 lines
4.2 KiB
242 lines
4.2 KiB
<HTML |
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>Audio</TITLE |
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TITLE="SDL_AudioSpec" |
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>SDL Library Documentation</TH |
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><H1 |
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NAME="AUDIO" |
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>Chapter 10. Audio</H1 |
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><DIV |
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CLASS="TOC" |
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><DL |
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><DT |
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><B |
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>Table of Contents</B |
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></DT |
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><DT |
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><A |
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HREF="sdlaudiospec.html" |
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>SDL_AudioSpec</A |
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> -- Audio Specification Structure</DT |
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><DT |
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><A |
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HREF="sdlopenaudio.html" |
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>SDL_OpenAudio</A |
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> -- Opens the audio device with the desired parameters.</DT |
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><DT |
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><A |
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HREF="sdlpauseaudio.html" |
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>SDL_PauseAudio</A |
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> -- Pauses and unpauses the audio callback processing</DT |
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><DT |
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><A |
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HREF="sdlgetaudiostatus.html" |
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>SDL_GetAudioStatus</A |
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> -- Get the current audio state</DT |
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><DT |
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><A |
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HREF="sdlloadwav.html" |
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>SDL_LoadWAV</A |
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> -- Load a WAVE file</DT |
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><DT |
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><A |
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HREF="sdlfreewav.html" |
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>SDL_FreeWAV</A |
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> -- Frees previously opened WAV data</DT |
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><DT |
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><A |
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HREF="sdlaudiocvt.html" |
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>SDL_AudioCVT</A |
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> -- Audio Conversion Structure</DT |
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><DT |
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><A |
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HREF="sdlbuildaudiocvt.html" |
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>SDL_BuildAudioCVT</A |
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> -- Initializes a SDL_AudioCVT structure for conversion</DT |
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><DT |
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><A |
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HREF="sdlconvertaudio.html" |
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>SDL_ConvertAudio</A |
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> -- Convert audio data to a desired audio format.</DT |
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><DT |
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><A |
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HREF="sdlmixaudio.html" |
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>SDL_MixAudio</A |
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> -- Mix audio data</DT |
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><DT |
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><A |
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HREF="sdllockaudio.html" |
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>SDL_LockAudio</A |
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> -- Lock out the callback function</DT |
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><DT |
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><A |
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HREF="sdlunlockaudio.html" |
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>SDL_UnlockAudio</A |
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> -- Unlock the callback function</DT |
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><DT |
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><A |
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HREF="sdlcloseaudio.html" |
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>SDL_CloseAudio</A |
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> -- Shuts down audio processing and closes the audio device.</DT |
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><P |
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>Sound on the computer is translated from waves that you hear into a series of |
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values, or samples, each representing the amplitude of the wave. When these |
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samples are sent in a stream to a sound card, an approximation of the original |
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wave can be recreated. The more bits used to represent the amplitude, and the |
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greater frequency these samples are gathered, the closer the approximated |
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sound is to the original, and the better the quality of sound.</P |
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><P |
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>This library supports both 8 and 16 bit signed and unsigned sound samples, |
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at frequencies ranging from 11025 Hz to 44100 Hz, depending on the |
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underlying hardware. If the hardware doesn't support the desired audio |
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format or frequency, it can be emulated if desired (See |
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<A |
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HREF="sdlopenaudio.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_OpenAudio()</TT |
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></A |
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>)</P |
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><P |
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>A commonly supported audio format is 16 bits per sample at 22050 Hz.</P |
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>SDL_JoystickClose</TD |
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