path: root/lib/avtp_pipeline/intf_echo/openavb_intf_echo.c

/*************************************************************************************************************
Copyright (c) 2012-2015, Symphony Teleca Corporation, a Harman International Industries, Incorporated company
Copyright (c) 2016-2017, Harman International Industries, Incorporated
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Attributions: The inih library portion of the source code is licensed from 
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/*
* MODULE SUMMARY : Echo interface module.
* 
* This interface module as a talker to push a configured string out. As
*  a listener it will echo the data to stdout. This is strickly for
*  testing purposes and is generally intented to work with the Pipe
*  mapping module.
*/

#include <stdlib.h>
#include <string.h>
#include "openavb_types_pub.h"
#include "openavb_trace_pub.h"
#include "openavb_mediaq_pub.h"
#include "openavb_intf_pub.h"

#define	AVB_LOG_COMPONENT	"Echo Interface"
#include "openavb_log_pub.h" 

typedef struct {
	/////////////
	// Config data
	/////////////
	// intf_nv_echo_string: sets a string that will be sent by the talker.
	char *pEchoString;
	
	// String repeat
	U32 echoStringRepeat;

	// calculated value from pEchoString.
	U32 echoStringLen;

	// Append an incrementing number to the string.
	bool increment;

	// Output locally at the talker.
	bool txLocalEcho;

	// No new line.
	bool noNewline;

	// Ignore timestamp at listener.
	bool ignoreTimestamp;

	/////////////
	// Variable data
	/////////////
	// When increment is enable this is the counter
	U32 Counter;

	bool fixedTimestampEnabled;
	U32 tsIncrement;
	avtp_time_t walltime;
} pvt_data_t;


// Each configuration name value pair for this mapping will result in this callback being called.
void openavbIntfEchoCfgCB(media_q_t *pMediaQ, const char *name, const char *value) 
{
	AVB_TRACE_ENTRY(AVB_TRACE_INTF);
	if (pMediaQ) {
		char *pEnd;
		long tmp;

		pvt_data_t *pPvtData = pMediaQ->pPvtIntfInfo;
		if (!pPvtData) {
			AVB_LOG_ERROR("Private interface module data not allocated.");
			return;
		}

		if (strcmp(name, "intf_nv_echo_string") == 0) {
			if (pPvtData->pEchoString)
				free(pPvtData->pEchoString);
			pPvtData->pEchoString = strdup(value);
			if (pPvtData->pEchoString) {
				pPvtData->echoStringLen = strlen(pPvtData->pEchoString);
			}
		}
		else if (strcmp(name, "intf_nv_echo_string_repeat") == 0) {
			pPvtData->echoStringRepeat = strtol(value, &pEnd, 10);

			// Repeat the string if needed
			if (pPvtData->echoStringRepeat > 1 && pPvtData->pEchoString) {
				char *pEchoStringRepeat = calloc(1, (pPvtData->echoStringLen * pPvtData->echoStringRepeat) + 1); 

				int i1;
				for (i1 = 0; i1 < pPvtData->echoStringRepeat; i1++) {
					strcat(pEchoStringRepeat, pPvtData->pEchoString);
				}

				free(pPvtData->pEchoString);
				pPvtData->pEchoString = pEchoStringRepeat;
				pPvtData->echoStringLen = strlen(pPvtData->pEchoString);
			}
		}
		else if (strcmp(name, "intf_nv_echo_increment") == 0) {
			tmp = strtol(value, &pEnd, 10);
			if (*pEnd == '\0' && tmp == 1) {
				pPvtData->increment = (tmp == 1);
			}
		}
		else if (strcmp(name, "intf_nv_tx_local_echo") == 0) {
			tmp = strtol(value, &pEnd, 10);
			if (*pEnd == '\0' && tmp == 1) {
				pPvtData->txLocalEcho = (tmp == 1);
			}
		}
		else if (strcmp(name, "intf_nv_echo_no_newline") == 0) {
			tmp = strtol(value, &pEnd, 10);
			if (*pEnd == '\0' && tmp == 1) {
				pPvtData->noNewline = (tmp == 1);
			}
		}
		else if (strcmp(name, "intf_nv_ignore_timestamp") == 0) {
			tmp = strtol(value, &pEnd, 10);
			if (*pEnd == '\0' && tmp == 1) {
				pPvtData->ignoreTimestamp = (tmp == 1);
			}
		}
	}

	AVB_TRACE_EXIT(AVB_TRACE_INTF);
}

void openavbIntfEchoGenInitCB(media_q_t *pMediaQ) 
{
	AVB_TRACE_ENTRY(AVB_TRACE_INTF);
	AVB_TRACE_EXIT(AVB_TRACE_INTF);
}

// A call to this callback indicates that this interface module will be
// a talker. Any talker initialization can be done in this function.
void openavbIntfEchoTxInitCB(media_q_t *pMediaQ) 
{
	AVB_TRACE_ENTRY(AVB_TRACE_INTF);

	if (pMediaQ) {
		pvt_data_t *pPvtData = pMediaQ->pPvtIntfInfo;
		if (!pPvtData) {
			AVB_LOG_ERROR("Private interface module data not allocated.");
			return;
		}

		pPvtData->Counter = 0;

		if (pPvtData->fixedTimestampEnabled)
			openavbAvtpTimeSetToWallTime(&pPvtData->walltime);
	}

	AVB_TRACE_EXIT(AVB_TRACE_INTF);
}

// This callback will be called for each AVB transmit interval. Commonly this will be
// 4000 or 8000 times  per second.
bool openavbIntfEchoTxCB(media_q_t *pMediaQ)
{
	AVB_TRACE_ENTRY(AVB_TRACE_INTF_DETAIL);
	if (pMediaQ) {
		pvt_data_t *pPvtData = pMediaQ->pPvtIntfInfo;
		if (!pPvtData) {
			AVB_LOG_ERROR("Private interface module data not allocated.");
			return FALSE;
		}

		media_q_item_t *pMediaQItem = openavbMediaQHeadLock(pMediaQ);
		if (pMediaQItem) {
			if (pMediaQItem->itemSize >= (pPvtData->increment ? pPvtData->echoStringLen + 16 : pPvtData->echoStringLen)) {
				if (pPvtData->increment) {
					int len = sprintf(pMediaQItem->pPubData, "%s %u", pPvtData->pEchoString, pPvtData->Counter++);
					pMediaQItem->dataLen = len;
				}
				else {
					memcpy(pMediaQItem->pPubData, pPvtData->pEchoString, pPvtData->echoStringLen);
					pMediaQItem->dataLen = pPvtData->echoStringLen;
				}
			}
			else {
				memcpy(pMediaQItem->pPubData, pPvtData->pEchoString, pMediaQItem->itemSize);
				pMediaQItem->dataLen = pMediaQItem->itemSize;
			}

			if (pPvtData->txLocalEcho) {
				if (pPvtData->noNewline)
					printf("%s ", (char *)pMediaQItem->pPubData); 
				else
					printf("%s\n\r", (char *)pMediaQItem->pPubData); 
			}

			if (pPvtData->fixedTimestampEnabled) {
				openavbAvtpTimeAddUSec(&pPvtData->walltime, pPvtData->tsIncrement);
				*pMediaQItem->pAvtpTime = pPvtData->walltime;
			} else {
				openavbAvtpTimeSetToWallTime(pMediaQItem->pAvtpTime);
			}
			openavbMediaQHeadPush(pMediaQ);
			AVB_TRACE_EXIT(AVB_TRACE_INTF_DETAIL);
			return TRUE;
		}
		else {
			AVB_TRACE_EXIT(AVB_TRACE_INTF_DETAIL);
			return FALSE;	// Media queue full
		}
	}
	AVB_TRACE_EXIT(AVB_TRACE_INTF_DETAIL);
	return FALSE;
}

// A call to this callback indicates that this interface module will be
// a listener. Any listener initialization can be done in this function.
void openavbIntfEchoRxInitCB(media_q_t *pMediaQ) 
{
	AVB_TRACE_ENTRY(AVB_TRACE_INTF);

	if (pMediaQ) {
		pvt_data_t *pPvtData = pMediaQ->pPvtIntfInfo;
		if (!pPvtData) {
			AVB_LOG_ERROR("Private interface module data not allocated.");
			return;
		}

		pPvtData->Counter = 0;
	}

	AVB_TRACE_EXIT(AVB_TRACE_INTF);
}

// This callback is called when acting as a listener.
bool openavbIntfEchoRxCB(media_q_t *pMediaQ) 
{
	AVB_TRACE_ENTRY(AVB_TRACE_INTF_DETAIL);
	if (pMediaQ) {
		bool moreItems = TRUE;
		pvt_data_t *pPvtData = pMediaQ->pPvtIntfInfo;
		if (!pPvtData) {
			AVB_LOG_ERROR("Private interface module data not allocated.");
			return FALSE;
		}

		media_q_item_t *pMediaQItem = NULL;
		while (moreItems) {
			pMediaQItem = openavbMediaQTailLock(pMediaQ, pPvtData->ignoreTimestamp);
			if (pMediaQItem) {
				if (pMediaQItem->dataLen) {
					if (pMediaQItem->itemSize > pMediaQItem->dataLen) {
						*((char*)pMediaQItem->pPubData + pMediaQItem->dataLen) = 0; //End string with 0
					}
					if (pPvtData->noNewline) {
						printf("%s ", (char *)pMediaQItem->pPubData); 
					}
					else {
						if (pPvtData->increment) {
							printf("%s : %u\n\r", (char *)pMediaQItem->pPubData, pPvtData->Counter++); 
						}
						else {
							printf("%s\n\r", (char *)pMediaQItem->pPubData); 
						}
					}
				}
				openavbMediaQTailPull(pMediaQ);
			}
			else {
				moreItems = FALSE;
			}
		}
	}
	AVB_TRACE_EXIT(AVB_TRACE_INTF_DETAIL);
	return FALSE;
}

// This callback will be called when the stream is closing. 
void openavbIntfEchoEndCB(media_q_t *pMediaQ) 
{
	AVB_TRACE_ENTRY(AVB_TRACE_INTF);
	AVB_TRACE_EXIT(AVB_TRACE_INTF);
}

// General shutdown callback regardless if a talker or listener. Called once during openavbTLClose()
void openavbIntfEchoGenEndCB(media_q_t *pMediaQ) 
{
	AVB_TRACE_ENTRY(AVB_TRACE_INTF);
	if (pMediaQ) {
		pvt_data_t *pPvtData = pMediaQ->pPvtIntfInfo;
		if (!pPvtData) {
			AVB_LOG_ERROR("Private interface module data not allocated.");
			return;
		}

		if (pPvtData->pEchoString) {
			free(pPvtData->pEchoString);
			pPvtData->pEchoString = NULL;
		}
	}
	AVB_TRACE_EXIT(AVB_TRACE_INTF);
}

void openavbIntfEchoEnableFixedTimestamp(media_q_t *pMediaQ, bool enabled, U32 transmitInterval, U32 batchFactor)
{
	AVB_TRACE_ENTRY(AVB_TRACE_INTF);
	if (pMediaQ && pMediaQ->pPvtIntfInfo) {
		pvt_data_t *pPvtData = (pvt_data_t *)pMediaQ->pPvtIntfInfo;

		pPvtData->fixedTimestampEnabled = enabled;
		if (pPvtData->fixedTimestampEnabled) {
				pPvtData->tsIncrement = NANOSECONDS_PER_SECOND/transmitInterval;
		}

		if (batchFactor != 1) {
			AVB_LOGF_WARNING("batchFactor of %d ignored (must be 1)", batchFactor);
		}
	}

	AVB_TRACE_EXIT(AVB_TRACE_INTF);
}

// Main initialization entry point into the interface module
extern bool DLL_EXPORT openavbIntfEchoInitialize(media_q_t *pMediaQ, openavb_intf_cb_t *pIntfCB)
{
	AVB_TRACE_ENTRY(AVB_TRACE_INTF);

	if (pMediaQ) {
		pMediaQ->pPvtIntfInfo = calloc(1, sizeof(pvt_data_t));		// Memory freed by the media queue when the media queue is destroyed.

		if (!pMediaQ->pPvtIntfInfo) {
			AVB_LOG_ERROR("Unable to allocate memory for AVTP interface module.");
			return FALSE;
		}

		pvt_data_t *pPvtData = pMediaQ->pPvtIntfInfo;

		pIntfCB->intf_cfg_cb = openavbIntfEchoCfgCB;
		pIntfCB->intf_gen_init_cb = openavbIntfEchoGenInitCB;
		pIntfCB->intf_tx_init_cb = openavbIntfEchoTxInitCB;
		pIntfCB->intf_tx_cb = openavbIntfEchoTxCB;
		pIntfCB->intf_rx_init_cb = openavbIntfEchoRxInitCB;
		pIntfCB->intf_rx_cb = openavbIntfEchoRxCB;
		pIntfCB->intf_end_cb = openavbIntfEchoEndCB;
		pIntfCB->intf_gen_end_cb = openavbIntfEchoGenEndCB;
		pIntfCB->intf_enable_fixed_timestamp = openavbIntfEchoEnableFixedTimestamp;

		pPvtData->pEchoString = NULL;
		pPvtData->echoStringRepeat = 1; 
		pPvtData->echoStringLen = 0;
		pPvtData->increment = FALSE;
		pPvtData->txLocalEcho = FALSE;
		pPvtData->noNewline = FALSE;
		pPvtData->ignoreTimestamp = FALSE;
		pPvtData->fixedTimestampEnabled = FALSE;
	}

	AVB_TRACE_EXIT(AVB_TRACE_INTF);
	return TRUE;
}