jack.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <strings.h>
#include <jack/types.h>
#include <jack/jack.h>
#include <jack/ringbuffer.h>
#include <gpac/modules/audio_out.h>

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Data Structures
struct	JackContext

Macros
#define	MAX_JACK_CLIENT_NAME_SZ   128
#define	JACK_PORT_NAME_MAX_SZ   128

Functions
static void	Jack_cleanup (JackContext *ctx)
static int	process_callback (jack_nframes_t nframes, void *arg)
static int	onBufferSizeChanged (jack_nframes_t nframes, void *arg)
static GF_Err	Jack_Setup (GF_AudioOutput *dr, void *os_handle, u32 num_buffers, u32 total_duration)
static void	Jack_Shutdown (GF_AudioOutput *dr)
static GF_Err	Jack_Configure (GF_AudioOutput *dr, u32 *SampleRate, u32 *NbChannels, u32 *audioFormat, u64 channel_cfg)
static void	Jack_SetVolume (GF_AudioOutput *dr, u32 Volume)
static void	Jack_SetPan (GF_AudioOutput *dr, u32 Pan)
static void	Jack_SetPriority (GF_AudioOutput *dr, u32 Priority)
static u32	Jack_GetAudioDelay (GF_AudioOutput *dr)
static GF_Err	Jack_QueryOutputSampleRate (GF_AudioOutput *dr, u32 *desired_sr, u32 *NbChannels, u32 *nbBitsPerSample)
void *	NewJackOutput ()
void	DeleteJackOutput (void *ifce)
GPAC_MODULE_EXPORT const u32 *	QueryInterfaces ()
GPAC_MODULE_EXPORT GF_BaseInterface *	LoadInterface (u32 InterfaceType)
GPAC_MODULE_EXPORT void	ShutdownInterface (GF_BaseInterface *ifce)

Variables
static GF_GPACArg	JackArgs []

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Data Structure Documentation

JackContext

struct JackContext

Data Fields
char	jackClientName[MAX_JACK_CLIENT_NAME_SZ]
jack_client_t *	jack
jack_port_t **	jackPorts
jack_nframes_t	currentBlockSize
u32	numChannels
char *	buffer
u32	bufferSz
u32	bytesPerSample
Bool	isActive
Bool	autoConnect
jack_default_audio_sample_t **	channels
float	volume

Macro Definition Documentation

MAX_JACK_CLIENT_NAME_SZ

#define MAX_JACK_CLIENT_NAME_SZ   128

JACK_PORT_NAME_MAX_SZ

#define JACK_PORT_NAME_MAX_SZ   128

Function Documentation

Jack_cleanup()

static void Jack_cleanup ( JackContext *  ctx )

static

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process_callback()

static int process_callback ( jack_nframes_t  nframes, void *  arg  )

static

The callback called by the jack thread

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onBufferSizeChanged()

static int onBufferSizeChanged ( jack_nframes_t  nframes, void *  arg  )

static

Called when jackbuffer size change

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Jack_Setup()

static GF_Err Jack_Setup ( GF_AudioOutput *  dr, void *  os_handle, u32  num_buffers, u32  total_duration  )

static

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Jack_Shutdown()

static void Jack_Shutdown ( GF_AudioOutput *  dr )

static

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Jack_Configure()

static GF_Err Jack_Configure ( GF_AudioOutput *  dr, u32 *  SampleRate, u32 *  NbChannels, u32 *  audioFormat, u64  channel_cfg  )

static

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Jack_SetVolume()

static void Jack_SetVolume ( GF_AudioOutput *  dr, u32  Volume  )

static

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Jack_SetPan()

static void Jack_SetPan ( GF_AudioOutput *  dr, u32  Pan  )

static

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Jack_SetPriority()

static void Jack_SetPriority ( GF_AudioOutput *  dr, u32  Priority  )

static

Jack manages the priority itself, we don't need to interfere here...

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Jack_GetAudioDelay()

static u32 Jack_GetAudioDelay ( GF_AudioOutput *  dr )

static

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Jack_QueryOutputSampleRate()

static GF_Err Jack_QueryOutputSampleRate ( GF_AudioOutput *  dr, u32 *  desired_sr, u32 *  NbChannels, u32 *  nbBitsPerSample  )

static

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NewJackOutput()

void* NewJackOutput

(

)

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DeleteJackOutput()

void DeleteJackOutput

(

void *

ifce

)

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QueryInterfaces()

GPAC_MODULE_EXPORT const u32* QueryInterfaces

(

)

LoadInterface()

GPAC_MODULE_EXPORT GF_BaseInterface* LoadInterface

(

u32

InterfaceType

)

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ShutdownInterface()

GPAC_MODULE_EXPORT void ShutdownInterface

(

GF_BaseInterface *

ifce

)

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Variable Documentation

JackArgs

GF_GPACArg JackArgs[]

static

Initial value:

= {
        GF_DEF_ARG("auto-connect", NULL, "automatically connect to jackd", "true", NULL, GF_ARG_BOOL, 0),
        GF_DEF_ARG("start-server", NULL, "automatically start JACK server if not running", "true", NULL, GF_ARG_BOOL, 0),
        {0},
}