forked from KolibriOS/kolibrios
234 lines
4.0 KiB
HTML
234 lines
4.0 KiB
HTML
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<HTML
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><HEAD
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><TITLE
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>Audio</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.64
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"><LINK
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REL="HOME"
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TITLE="SDL Library Documentation"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="SDL Reference"
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HREF="reference.html"><LINK
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REL="PREVIOUS"
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TITLE="SDL_JoystickClose"
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HREF="sdljoystickclose.html"><LINK
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REL="NEXT"
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TITLE="SDL_AudioSpec"
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HREF="sdlaudiospec.html"><META
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NAME="KEYWORD"
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CONTENT="audio"><META
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NAME="KEYWORD"
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CONTENT="function"></HEAD
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><BODY
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CLASS="CHAPTER"
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BGCOLOR="#FFF8DC"
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TEXT="#000000"
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LINK="#0000ee"
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VLINK="#551a8b"
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ALINK="#ff0000"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>SDL Library Documentation</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="sdljoystickclose.html"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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></TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="sdlaudiospec.html"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="CHAPTER"
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><H1
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><A
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NAME="AUDIO"
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>Chapter 10. Audio</A
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></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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></DL
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></DIV
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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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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="sdljoystickclose.html"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="sdlaudiospec.html"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>SDL_JoystickClose</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="reference.html"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>SDL_AudioSpec</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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>
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