/* 
	NTSC FullSearch Test Code 
	
	ARZHNA
	
*/
#include "DHL_OSAL.h"
#include "DHL_FE.h"
#include "DHL_DBG.h"
#include "DMW_Status.h"

/* 모두 KHz 단위 */
#define SEARCH_STEP_FREQ				831
#define	SHORT_SEARCH_HALF_BOUND			SEARCH_STEP_FREQ
#define SEARCH_FREQ_POSITIVE_BOUNDARY	844
#define SEARCH_FREQ_NEGATIVE_BOUNDARY	-831

static STATUS dmw_search_ntsc_get_deviation(tDHL_TunerID id, UINT32 freqKHz, INT32* freq)
{
	DHL_RESULT dhl_result;
	
	dhl_result = DHL_FE_Start(id, freqKHz, eDHL_DEMOD_NTSC, NULL);
	if(dhl_result)
		return statusError;

	DHL_OS_Delay(10);

	dhl_result = DHL_FE_GetSignalStatus(id, eDHL_SIGNAL_NTSC_FREQ_DEVIATION, (UINT32*)freq);	
	if(dhl_result)
		return statusError;	
	return statusOK;
}

/* 모든 freq는 KHz 단위로 입력한다 */
static STATUS dmw_search_ntsc_one_channel(tDHL_TunerID id, UINT32 start_freq, UINT32 end_freq, UINT32 step_freq, UINT32 *tune_freq)
{	
	STATUS result;
	UINT32 freqKHz;
	INT32 freq;	
	
	/* 우선 Center Frequency로 찾음. */
	freqKHz = (start_freq+end_freq)/2;

	result = dmw_search_ntsc_get_deviation(id, freqKHz, &freq);
	if(result)
		return result;
	
	if(freq < SEARCH_FREQ_POSITIVE_BOUNDARY && freq > SEARCH_FREQ_NEGATIVE_BOUNDARY){
		*tune_freq = freqKHz + freq;
		return statusOK;
	}else{
		for(freqKHz=start_freq; freqKHz<end_freq; freqKHz+=step_freq)
		{
			/* 시간을 줄이기 위해 이미 비교한 Center Frequency는 찾지 않는다. */
			if(((start_freq+end_freq)/2)+step_freq>freqKHz && ((start_freq+end_freq)/2)-step_freq<freqKHz)
				continue;
				
			result = dmw_search_ntsc_get_deviation(id, freqKHz, &freq);
			if(result)
				return result;
			
			if(freq < SEARCH_FREQ_POSITIVE_BOUNDARY && freq > SEARCH_FREQ_NEGATIVE_BOUNDARY){
				*tune_freq = freqKHz + freq;
				return statusOK;
			}			
		}	
	}
	
	return statusError;
}


STATUS DMW_NtscFullSearch(tDHL_TunerID id, int channel, tDHL_FreqStd freqTbl, INT32 *tune_freq, UINT32 search_range)
{
	STATUS result;
	UINT32 try_freq;
	
	/*
	 * Convert Channel to Frequency if bFreq == CHANNEL.
	 */	
	try_freq = DHL_FE_ChannelToFrequency(channel, freqTbl);

	result = dmw_search_ntsc_one_channel(id, try_freq-search_range, try_freq+search_range, SEARCH_STEP_FREQ, &tune_freq);

	return result;
}

STATUS DMW_NtscShortSearch(tDHL_TunerID id, int channel, tDHL_FreqStd freqTbl, INT32 *tune_freq, UINT32 search_range)
{
	STATUS result;
	UINT32 try_freq;
	
	result = DMW_NtscFullSearch(id, channel, freqTbl, tune_freq, SHORT_SEARCH_HALF_BOUND);
	
	return result;
}