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use fs;
use io;
use os;
use sdl2;
// The internal format for an audio chunk
export type chunk = struct {
allocated: int,
abuf: *u8,
alen: u32,
volume: u8,
};
@symbol("Mix_LoadWAV_RW") fn _loadwav_rw(src: *sdl2::rwops, freesrc: int) nullable *chunk;
// Loads a sample from an [[io::handle]]. The stream will not be closed for you.
export fn load(src: io::handle) (*chunk | sdl2::error) = {
const rw = sdl2::rw_from_handle(src);
defer sdl2::rwclose(rw);
return sdl2::wrapptr(_loadwav_rw(rw, 0))?: *chunk;
};
// Loads a sample from a file path.
export fn load_file(src: str) (*chunk | fs::error | sdl2::error) = {
const file = os::open(src)?;
defer io::close(file);
return load(file);
};
// Free the memory used in chunk, and free chunk itself as well. Do not use
// chunk after this without loading a new sample to it. Note: It's a bad idea to
// free a chunk that is still being played...
export @symbol("Mix_FreeChunk") fn free_chunk(chunk: *chunk) void;
// Maximum volume for a chunk.
export def MAX_VOLUME: int = 128; // XXX: SDL_mixer derives this from SDL_MIX_MAXVOLUME
// Sets the chunk volume as specified, returning the previous value.
export @symbol("Mix_VolumeChunk") fn volume_chunk(chunk: *chunk, volume: int) int;
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