SDL_AudioCVT
Section: SDL API Reference (3)
Updated: Tue 11 Sep 2001, 22:58
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NAME
SDL_AudioCVT - Audio Conversion Structure
STRUCTURE DEFINITION
typedef struct{
int needed;
Uint16 src_format;
Uint16 dest_format;
double rate_incr;
Uint8 *buf;
int len;
int len_cvt;
int len_mult;
double len_ratio;
void (*filters[10])(struct SDL_AudioCVT *cvt, Uint16 format);
int filter_index;
} SDL_AudioCVT;
STRUCTURE DATA
- needed
-
Set to one if the conversion is possible
- src_format
-
Audio format of the source
- dest_format
-
Audio format of the destination
- rate_incr
-
Rate conversion increment
- buf
-
Audio buffer
- len
-
Length of the original audio buffer in bytes
- len_cvt
-
Length of converted audio buffer in bytes (calculated)
- len_mult
-
buf must be len*len_mult bytes in size(calculated)
- len_ratio
-
Final audio size is len*len_ratio
- filters[10](..)
-
Pointers to functions needed for this conversion
- filter_index
-
Current conversion function
DESCRIPTION
The SDL_AudioCVT is used to convert audio data between different formats. A SDL_AudioCVT structure is created with the SDL_BuildAudioCVT function, while the actual conversion is done by the SDL_ConvertAudio function.
Many of the fields in the SDL_AudioCVT structure should be considered private and their function will not be discussed here.
- Uint8 *buf
-
- int len
-
- int len_mult
-
- double len_ratio
-
SEE ALSO
SDL_BuildAudioCVT, SDL_ConvertAudio, SDL_AudioSpec