[−][src]Struct fermium::audio::SDL_AudioSpec

#[repr(C)]pub struct SDL_AudioSpec {
    pub freq: c_int,
    pub format: SDL_AudioFormat,
    pub channels: u8,
    pub silence: u8,
    pub samples: u16,
    pub padding: u16,
    pub size: u32,
    pub callback: SDL_AudioCallback,
    pub userdata: *mut c_void,
}

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

For multi-channel audio, the default SDL channel mapping is:

2:  FL FR                       (stereo)
3:  FL FR LFE                   (2.1 surround)
4:  FL FR BL BR                 (quad)
5:  FL FR FC BL BR              (quad + center)
6:  FL FR FC LFE SL SR          (5.1 surround - last two can also be BL BR)
7:  FL FR FC LFE BC SL SR       (6.1 surround)
8:  FL FR FC LFE BL BR SL SR    (7.1 surround)

Fields

freq: c_int

DSP frequency -- samples per second

format: SDL_AudioFormat

Audio data format

channels: u8

Number of channels: 1 mono, 2 stereo, etc

silence: u8

Audio buffer silence value (calculated)

samples: u16

Audio buffer size in sample FRAMES (total samples divided by channel count)

padding: u16

Necessary for some compile environments

size: u32

Audio buffer size in bytes (calculated)

callback: SDL_AudioCallback

Callback that feeds the audio device (NULL to use SDL_QueueAudio()).

userdata: *mut c_void

Userdata passed to callback (ignored for NULL callbacks).

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