CCS: Regarding faxlib which supports t.38

Madhuri Rajana1

Tool/software: Code Composer Studio

This is the state machine followed by faxlib to support t.38 .Iam sending my pcm samples as input which i recieve from the t.30 fax machine to fmSendIn() Api.Then Iam calling fiuTask() function for t.38 processing and even i wanted to receive thepackets from the network interface so i called fiuReceiveIn().Is this the right way to do ?

In siu_open_fm() and In siu_open_fiu() he is doing the following configuration

fmOpencfg.RxOutSpec.fmReceiveOut = siuPcmInterface_Ch1;
fmOpencfg.SendOutSpec.fmSendOut = fiuSendIn;

fiuCfg.SendOutSpec.fiuSendOut = siuNetInterface;
fiuCfg.ReceiveOutSpec.fiuReceiveOut = fmReceiveIn;

Before I call fmsendIn() above funtions are getting initialized.After calling fmsendIn() is it required to call fiuSendIn() before calling fiuTask?If so what is the input i have to provide ?should i call any Api separately to send the packets to the network interface and to the analog interface or it will be done automatically when i call fiuTask() for network interface and fiuReceiveIn() for analog interface?

over 5 years ago

0 Rex Chang over 5 years ago

TI__Guru 50170 points

Hi, Madhuri,

Could you let me know which specific SoC you are using so that I can direct the issue to the right person? Please expect slow response during the holiday season.

Rex

0 Madhuri Rajana1 over 5 years ago in reply to Rex Chang

Prodigy 150 points

Iam using TMS320TCI6486 Digital Signal Processor .

0 lding over 5 years ago in reply to Madhuri Rajana1

TI__Guru* 95265 points

Hi,

There is a simulation program inside the faxlib for you to understand how the API was called. Please see the packages\ti\mas\fiu\test\ccsProjects

Regards, Eric

0 Madhuri Rajana1 over 5 years ago in reply to lding

Prodigy 150 points

Do i need to implement fiuSendIn() function to send t.38 Packets(output of fiuTask()) to the network interface?If so for this do i need to modify siuNetInterface

function to meet my requirements?

siuNetInterface accepts packet structure as

typedef struct

xferpktType_t type; /**< Defines the packet type being transported (see @ref xferpktType_t for the list of valid packet types) */

tuint srcPort; /**< Defines the source port where the packet originated from */

tint npkts; /**< Defines the number transmission segments being trasnported */

tint *pktSize; /**< Pointer to segment size array. */

void **pktIn; /**< Pointer to segment entry array */

void *suppInfo; /**< Pointer to optional supplemental data may be uninitialized between modules that don’t need it;| must be initialized for modules that need it.*/

} xferpktInfo_t;

How the output of fiuTask() is reflecting here?

0 lding over 5 years ago in reply to Madhuri Rajana1

TI__Guru* 95265 points

Hi,

We have limited support on T38 faxlib. I thought fiuSendIn() is your fmSendOut(). This is the input to FIU module, where the output of FIU is the network interface.

/**
* @brief This function passes a message from a fax modem module (FM) to FIU for processing.
*
* The message received from the FM is passed to the FRP module for processing.
* data is processed by the FRP. The FM to FP message structure is defined in the IFFAX.chm
*
* @param[in] message a pointer to the FM to FP message structure.
* @param[in,out] fiuInst Pointer to FIU instance.
*
*/
void fiuSendIn (void *fiuInst, void *message);

/******************************************************************************
* GLOBAL FUNCTION DEFINITIONS
*****************************************************************************/

/******************************************************************************
* FUNCTION PURPOSE: Implements fiuSendOut() API function, which sends network
* packets to the network interface.
******************************************************************************
* DESCRIPTION: Routine called by FIU to send packet(s) toward the network.
* FIU sends packets out (in the SendOut direction) to whatever
* packet processing module is tied to fiuSendOut - in this case
* siuNetInterface, which accepts packets but does no processing.
* Return value signifies that there was not an error.
*
* CALLING FORMAT:
* siuNetInterface (void *targetInst, - ptr to packet processing module
* tint npkts, - number of complete network pkts
* being sent to the network
* tint pkt_size[], - array specifying the size (in
* bytes) of each network packet
* void *packets[]) - array of network packet pointers
*
* RETURN VALUES:
* 0 - Pkt(s) successfully processed
* by network
* 1 - network busy; pkt not processed
*
*****************************************************************************/

Regards, Eric

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CCS: Regarding faxlib which supports t.38