User Audio Library

Defines
#define	PSP_AUDIO_VOLUME_MAX   0x8000
	The maximum output volume.
#define	PSP_AUDIO_CHANNEL_MAX   8
	The maximum number of hardware channels.
#define	PSP_AUDIO_NEXT_CHANNEL   (-1)
	Used to request the next available hardware channel.
#define	PSP_AUDIO_SAMPLE_MIN   64
	The minimum number of samples that can be allocated to a channel.
#define	PSP_AUDIO_SAMPLE_MAX   65472
	The maximum number of samples that can be allocated to a channel.
#define	PSP_AUDIO_SAMPLE_ALIGN(s)   (((s) + 63) & ~63)
	Make the given sample count a multiple of 64.
Enumerations
enum	PspAudioFormats { PSP_AUDIO_FORMAT_STEREO = 0, PSP_AUDIO_FORMAT_MONO = 0x10 }
enum	PspAudioFrequencies { PSP_AUDIO_FREQ_44K = 44100, PSP_AUDIO_FREQ_48K = 48000 }
Functions
int	sceAudioChReserve (int channel, int samplecount, int format)
	Allocate and initialize a hardware output channel.
int	sceAudioChRelease (int channel)
	Release a hardware output channel.
int	sceAudioOutput (int channel, int vol, void *buf)
int	sceAudioOutputBlocking (int channel, int vol, void *buf)
	a
int	sceAudioOutputPanned (int channel, int leftvol, int rightvol, void *buffer)
	a
int	sceAudioOutputPannedBlocking (int channel, int leftvol, int rightvol, void *buffer)
	a
int	sceAudioGetChannelRestLen (int channel)
	a
int	sceAudioSetChannelDataLen (int channel, int samplecount)
	a
int	sceAudioChangeChannelConfig (int channel, int format)
	a
int	sceAudioChangeChannelVolume (int channel, int leftvol, int rightvol)
	a
int	sceAudioSetFrequency (int frequency)
	Set audio sampling frequency.

---

Define Documentation

#define PSP_AUDIO_CHANNEL_MAX   8

The maximum number of hardware channels.

#define PSP_AUDIO_NEXT_CHANNEL   (-1)

Used to request the next available hardware channel.

#define PSP_AUDIO_SAMPLE_ALIGN

(

s

)

(((s) + 63) & ~63)

Make the given sample count a multiple of 64.

#define PSP_AUDIO_SAMPLE_MAX   65472

The maximum number of samples that can be allocated to a channel.

#define PSP_AUDIO_SAMPLE_MIN   64

The minimum number of samples that can be allocated to a channel.

#define PSP_AUDIO_VOLUME_MAX   0x8000

The maximum output volume.

---

Enumeration Type Documentation

enum PspAudioFormats

Enumerator:

PSP_AUDIO_FORMAT_STEREO	Channel is set to stereo output.
PSP_AUDIO_FORMAT_MONO	Channel is set to mono output.

enum PspAudioFrequencies

Enumerator:

PSP_AUDIO_FREQ_44K	Sampling frequency set to 44100Hz.
PSP_AUDIO_FREQ_48K	Sampling frequency set to 48000Hz.

---

Function Documentation

int sceAudioChangeChannelConfig	(	int	channel,
		int	format
	)

a

int sceAudioChangeChannelVolume	(	int	channel,
		int	leftvol,
		int	rightvol
	)

a

int sceAudioChRelease

(

int

channel

)

Release a hardware output channel.

Parameters:

channel

- The channel to release.

Returns:

0 on success, an error if less than 0.

int sceAudioChReserve	(	int	channel,
		int	samplecount,
		int	format
	)

Allocate and initialize a hardware output channel.

Parameters:

	channel	- Use a value between 0 - 7 to reserve a specific channel. Pass PSP_AUDIO_NEXT_CHANNEL to get the first available channel.
	samplecount	- The number of samples that can be output on the channel per output call. It must be a value between PSP_AUDIO_SAMPLE_MIN and PSP_AUDIO_SAMPLE_MAX, and it must be aligned to 64 bytes (use the PSP_AUDIO_SAMPLE_ALIGN macro to align it).
	format	- The output format to use for the channel. One of PspAudioFormats.

Returns:

The channel number on success, an error code if less than 0.

int sceAudioGetChannelRestLen

(

int

channel

)

a

int sceAudioOutput	(	int	channel,
		int	vol,
		void *	buf
	)

int sceAudioOutputBlocking	(	int	channel,
		int	vol,
		void *	buf
	)

a

int sceAudioOutputPanned	(	int	channel,
		int	leftvol,
		int	rightvol,
		void *	buffer
	)

a

int sceAudioOutputPannedBlocking	(	int	channel,
		int	leftvol,
		int	rightvol,
		void *	buffer
	)

a

int sceAudioSetChannelDataLen	(	int	channel,
		int	samplecount
	)

a

int sceAudioSetFrequency

(

int

frequency

)

Set audio sampling frequency.

Parameters:

frequency

- Sampling frequency to set audio output to - either 44100 or 48000.

Returns:

0 on success, an error if less than 0.

---