Differences between revisions 7 and 8

SDL_AudioSpec

A structure that describes the audio output format. It contains a callback that is called when the audio device needs more data.

Contents

Data Fields

int	freq	DSP frequency (samples per second)
SDL_AudioFormat	format	audio data format
Uint8	channels	number of channels: 1 mono, 2 stereo
Uint8	silence	audio buffer silence value (calculated)
Uint16	samples	audio buffer size in samples (power of 2)
Uint32	size	audio buffer size in bytes (calculated)
SDL_AudioCallback	callback	a function that is called when the audio device needs more data; see Remarks for details
void*	userdata	a pointer that is passed as the first parameter to callback

You can add your code example here

The calculated values in this structure are calculated by SDL_OpenAudio().

Stereo samples are stored in a LRLRLR ordering.

callback is of the form:

void callback(void*  userdata, 
              Uint8* stream, 
              int    len);

userdata	an application-specific parameter saved in the SDL_AudioSpec structure
stream	a pointer to the audio data buffer to be filled in by the callback
len	the length of that buffer in bytes

Once the callback returns, the buffer will no longer be valid.

-  ⇤ ← Revision 7 as of 2009-12-13 06:34:00 → 
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  Editor: SheenaSmith
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+   ← Revision 8 as of 2009-12-13 06:37:04 → ⇥
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  Editor: SheenaSmith
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-||int||'''freq'''||DSP frequency -- samples per second||
+||int||'''freq'''||DSP frequency (samples per second)||
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-||'''stream'''||a pointer to the audio data buffer||
+||'''userdata'''||an application-specific parameter saved in the SDL_AudioSpec structure||
||'''stream'''||a pointer to the audio data buffer to be filled in by the callback||