mixer.h File Reference

Go to the source code of this file.

Typedefs
typedef void(*	MxStreamCallback) (int16 *buffer, size_t samples)
	Type of callback functions for supplying PCM music. More...

Functions
bool	MxInitialize (uint rate)
void	MxMixSamples (void *buffer, uint samples)
MixerChannel *	MxAllocateChannel ()
void	MxSetChannelRawSrc (MixerChannel *mc, int8 *mem, size_t size, uint rate, bool is16bit)
void	MxSetChannelVolume (MixerChannel *mc, uint volume, float pan)
	Set volume and pan parameters for a sound. More...
void	MxActivateChannel (MixerChannel *)
uint32	MxSetMusicSource (MxStreamCallback music_callback)
	Set source of PCM music. More...
void	SetEffectVolume (uint8 volume)

Detailed Description

Functions to mix sound samples.

Definition in file mixer.h.

Typedef Documentation

MxStreamCallback

typedef void(* MxStreamCallback) (int16 *buffer, size_t samples)

Type of callback functions for supplying PCM music.

A music decoder/renderer implements this function and installs it with MxSetMusicSource, which also returns the sample rate used.

Parameters

buffer	Pointer to interleaved 2-channel signed 16 bit PCM data buffer, guaranteed to be 0-initialized.
samples	number of samples that must be filled into buffer.

Definition at line 21 of file mixer.h.

Function Documentation

MxSetChannelVolume()

void MxSetChannelVolume	(	MixerChannel *	mc,
		uint	volume,
		float	pan
	)

Set volume and pan parameters for a sound.

Parameters

mc	MixerChannel to set
volume	Volume level for sound, range is 0..16384
pan	Pan position for sound, range is 0..1

Definition at line 224 of file mixer.cpp.

MxSetMusicSource()

uint32 MxSetMusicSource

(

MxStreamCallback

music_callback

)

Set source of PCM music.

Parameters

music_callback

Function that will be called to fill sample buffers with music data.

Returns

Sample rate of mixer, which the buffers supplied to the callback must be rendered at.

Definition at line 244 of file mixer.cpp.

References lock.

Referenced by MusicDriver_FluidSynth::Start(), and MusicDriver_FluidSynth::Stop().