SDL_AudioCVT

Langue: en

Autres versions - même langue

Version: 121877 (mandriva - 01/05/08)

Section: 3 (Bibliothèques de fonctions)

Sommaire

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