Helix MP3 Decoder. More...

Collaboration diagram for Helix:

Data Structures
struct	_HXDCB
struct	_MP3PLAYERINFO
Defines
#define	AUDIO_DAC_MIN_GAIN -73
#define	AUDIO_DAC_MAX_GAIN 6
#define	AUDIO_SETWRITETIMEOUT 0x010d
#define	AUDIO_GETWRITETIMEOUT 0x010e
#define	AUDIO_PLAY 0x3001
	Immediately start playing.
#define	AUDIO_CANCEL 0x3002
	Immediately stop playing and discard buffer.
#define	AUDIO_GET_STATUS 0x3003
#define	AUDIO_GET_PLAYGAIN 0x3004
#define	AUDIO_SET_PLAYGAIN 0x3005
#define	AUDIO_GET_PBSIZE 0x3006
#define	AUDIO_SET_PBSIZE 0x3007
#define	AUDIO_GET_PBLEVEL 0x3008
#define	AUDIO_GET_PBWLOW 0x3009
#define	AUDIO_SET_PBWLOW 0x300A
#define	AUDIO_GET_PBWHIGH 0x300B
#define	AUDIO_SET_PBWHIGH 0x300C
#define	AUDIO_BEEP 0x300F
#define	AUDIO_GET_DECINFO 0x3010
	Retrieve decoder information.
#define	AUDIO_GET_DECCAPS 0x3011
	Retrieve decoder capabilities.
#define	AUDIO_GET_DECFMTS 0x3012
	Retrieve decoder formats.
#define	AUDIO_SET_DECFMTS 0x3013
	Enable or disable specific decoder formats.
#define	AUDIO_GET_CODINFO 0x3014
	Retrieve encoder information.
#define	AUDIO_GET_CODCAPS 0x3015
	Retrieve encoder capabilities.
#define	AUDIO_GET_CODFMTS 0x3016
	Retrieve encoder formats.
#define	AUDIO_SET_CODFMTS 0x3017
	Enable or disable specific encoder formats.
#define	AUDIO_GET_MIDINFO 0x3018
	Retrieve midi information.
#define	AUDIO_GET_MIDCAPS 0x3019
	Retrieve midi capabilities.
#define	CODEC_STATUS_IDLE 0
#define	CODEC_STATUS_PLAYING 1
Typedefs
typedef struct _HXDCB	HXDCB
typedef struct _MP3PLAYERINFO	MP3PLAYERINFO
Functions
void	FeederThread (void *arg)
Variables
NUTDEVICE	devHelixCodec
	Device information structure.
NUTDEVICE	devHelixCodec
	Device information structure.

Detailed Description

Helix MP3 Decoder.

Define Documentation

#define AUDIO_DAC_MIN_GAIN -73

Referenced by VsDecoderSetVolume().

#define AUDIO_DAC_MAX_GAIN 6

Referenced by VsDecoderSetVolume().

#define AUDIO_SETWRITETIMEOUT 0x010d

Referenced by VsCodecIOCtl().

#define AUDIO_GETWRITETIMEOUT 0x010e

Referenced by VsCodecIOCtl().

#define AUDIO_PLAY 0x3001

Immediately start playing.

Referenced by VsCodecIOCtl().

#define AUDIO_CANCEL 0x3002

Immediately stop playing and discard buffer.

Referenced by VsCodecIOCtl().

#define AUDIO_GET_STATUS 0x3003

Referenced by VsCodecIOCtl().

#define AUDIO_GET_PLAYGAIN 0x3004

Referenced by VsCodecIOCtl().

#define AUDIO_SET_PLAYGAIN 0x3005

Referenced by VsCodecIOCtl().

#define AUDIO_GET_PBSIZE 0x3006

Referenced by VsCodecIOCtl().

#define AUDIO_SET_PBSIZE 0x3007

Referenced by VsCodecIOCtl().

#define AUDIO_GET_PBLEVEL 0x3008

Referenced by VsCodecIOCtl().

#define AUDIO_GET_PBWLOW 0x3009

Referenced by VsCodecIOCtl().

#define AUDIO_SET_PBWLOW 0x300A

Referenced by VsCodecIOCtl().

#define AUDIO_GET_PBWHIGH 0x300B

Referenced by VsCodecIOCtl().

#define AUDIO_SET_PBWHIGH 0x300C

Referenced by VsCodecIOCtl().

#define AUDIO_BEEP 0x300F

Referenced by VsCodecIOCtl().

#define AUDIO_GET_DECINFO 0x3010

Retrieve decoder information.

Referenced by VsCodecIOCtl().

#define AUDIO_GET_DECCAPS 0x3011

Retrieve decoder capabilities.

Referenced by VsCodecIOCtl().

#define AUDIO_GET_DECFMTS 0x3012

Retrieve decoder formats.

#define AUDIO_SET_DECFMTS 0x3013

Enable or disable specific decoder formats.

#define AUDIO_GET_CODINFO 0x3014

Retrieve encoder information.

Referenced by VsCodecIOCtl().

#define AUDIO_GET_CODCAPS 0x3015

Retrieve encoder capabilities.

Referenced by VsCodecIOCtl().

#define AUDIO_GET_CODFMTS 0x3016

Retrieve encoder formats.

#define AUDIO_SET_CODFMTS 0x3017

Enable or disable specific encoder formats.

#define AUDIO_GET_MIDINFO 0x3018

Retrieve midi information.

Referenced by VsCodecIOCtl().

#define AUDIO_GET_MIDCAPS 0x3019

Retrieve midi capabilities.

Referenced by VsCodecIOCtl().

#define CODEC_STATUS_IDLE 0

Referenced by FeederThread(), VsCodecIOCtl(), VsCodecRead(), and VsDecoderBufferInit().

#define CODEC_STATUS_PLAYING 1

Referenced by FeederThread(), VsCodecIOCtl(), and VsCodecRead().

Typedef Documentation

typedef struct _HXDCB HXDCB

typedef struct _MP3PLAYERINFO MP3PLAYERINFO

Function Documentation

void FeederThread ( void * arg )

References CODEC_STATUS_IDLE, CODEC_STATUS_PLAYING, _HXDCB::dcb_bufque, _HXDCB::dcb_feedme, _HXDCB::dcb_lvol, _HXDCB::dcb_pbstat, _HXDCB::dcb_pbwhi, _HXDCB::dcb_rvol, _HXDCB::dcb_scmd, _NUTDEVICE::dev_dcb, free(), HXREQ_CANCEL, HXREQ_PLAY, HXREQ_VOLUPD, MAINBUF_SIZE, malloc(), memcpy(), NULL, NUT_WAIT_INFINITE, NutEventPost(), NutEventWait(), NutSegBufReadLast(), NutSegBufReadRequest(), NutSegBufReset(), NutSegBufUsed(), and NutThreadSetPriority().

Here is the call graph for this function:

Variable Documentation

NUTDEVICE devHelixCodec

Device information structure.

An application must pass a pointer to this structure to NutRegisterDevice() before using this driver.

The device is named audio0.

NUTDEVICE devHelixCodec

Initial value:

 {
    0,              
    {'a', 'u', 'd', 'i', 'o', '0', 0, 0, 0},    
    IFTYP_CHAR,     
    0,              
    0,              
    0,              
    &dcb,           
    HelixInit,         
    HelixIOCtl,        
    NULL,           
    HelixWrite,        

    HelixWrite_P,      

    HelixOpen,         
    HelixClose,        
    NULL            
}

Device information structure.

An application must pass a pointer to this structure to NutRegisterDevice() before using this driver.

The device is named audio0.

Data Structures

Defines

Typedefs

Functions

Variables

Detailed Description

Define Documentation

Typedef Documentation

Function Documentation

Variable Documentation