SDL_AudioFormat

An enumeration of audio formats.

Values

Bit Meanings

These are what the 16 bits in SDL_AudioFormat currently mean:

 +----------------------sample is signed if set
 |
 |        +----------sample is bigendian if set
 |        |
 |        |           +--sample is float if set
 |        |           |
 |        |           |  +--sample bit size---+
 |        |           |  |                    |
15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0 

Unspecified bits are always zero. There are macros in SDL 1.3 and later to query these bits.

Audio Format Macros

SDL_AUDIO_MASK_BITSIZE

(0xFF)

SDL_AUDIO_MASK_DATATYPE

(1<<8)

SDL_AUDIO_MASK_ENDIAN

(1<<12)

SDL_AUDIO_MASK_SIGNED

(1<<15)

SDL_AUDIO_BITSIZE(x)

(x & SDL_AUDIO_MASK_BITSIZE)

SDL_AUDIO_ISFLOAT(x)

(x & SDL_AUDIO_MASK_DATATYPE)

SDL_AUDIO_ISBIGENDIAN(x)

(x & SDL_AUDIO_MASK_ENDIAN)

SDL_AUDIO_ISSIGNED(x)

(x & SDL_AUDIO_MASK_SIGNED)

SDL_AUDIO_ISINT(x)

(!SDL_AUDIO_ISFLOAT(x))

SDL_AUDIO_ISLITTLEENDIAN(x)

(!SDL_AUDIO_ISBIGENDIAN(x))

SDL_AUDIO_ISUNSIGNED(x)

(!SDL_AUDIO_ISSIGNED(x))

Audio Format Values

8-bit support

AUDIO_S8

signed 8-bit samples

AUDIO_U8

unsigned 8-bit samples

16-bit support

AUDIO_S16LSB

signed 16-bit samples in little-endian byte order

AUDIO_S16MSB

signed 16-bit samples in big-endian byte order

AUDIO_S16SYS

signed 16-bit samples in native byte order

AUDIO_S16

AUDIO_S16LSB

AUDIO_U16LSB

unsigned 16-bit samples in little-endian byte order

AUDIO_U16MSB

unsigned 16-bit samples in big-endian byte order

AUDIO_U16SYS

unsigned 16-bit samples in native byte order

AUDIO_U16

AUDIO_U16LSB

32-bit support (new to SDL 1.3)

AUDIO_S32LSB

32-bit integer samples in little-endian byte order

AUDIO_S32MSB

32-bit integer samples in big-endian byte order

AUDIO_S32SYS

32-bit integer samples in native byte order

AUDIO_S32

AUDIO_S32LSB

float support (new to SDL 1.3)

AUDIO_F32LSB

32-bit floating point samples in little-endian byte order

AUDIO_F32MSB

32-bit floating point samples in big-endian byte order

AUDIO_F32SYS

32-bit floating point samples in native byte order

AUDIO_F32

AUDIO_F32LSB

Code Examples

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Remarks

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CategoryEnum, CategoryAudio

SDL_AudioFormat (last edited 2010-10-16 22:16:01 by SheenaSmith)

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