[Feature][Modem]Update MTK MODEM V1.6 baseline version: MOLY.NR15.R3.MD700.IVT.MP1MR3.MP.V1.6

MTK modem version: MT2735_IVT_MOLY.NR15.R3.MD700.IVT.MP1MR3.MP.V1.6.tar.gz
RF  modem version: NA

Change-Id: I45a4c2752fa9d1a618beacd5d40737fb39ab64fb
diff --git a/mcu/driver/audio/src/v1/bgSnd.c b/mcu/driver/audio/src/v1/bgSnd.c
new file mode 100644
index 0000000..85ac76e
--- /dev/null
+++ b/mcu/driver/audio/src/v1/bgSnd.c
@@ -0,0 +1,1033 @@
+/*****************************************************************************
+*  Copyright Statement:
+*  --------------------
+*  This software is protected by Copyright and the information contained
+*  herein is confidential. The software may not be copied and the information
+*  contained herein may not be used or disclosed except with the written
+*  permission of MediaTek Inc. (C) 2005
+*
+*  BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
+*  THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
+*  RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
+*  AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
+*  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
+*  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
+*  NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
+*  SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
+*  SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
+*  THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
+*  NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
+*  SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
+*
+*  BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
+*  LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
+*  AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
+*  OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
+*  MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
+*
+*  THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
+*  WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
+*  LAWS PRINCIPLES.  ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
+*  RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
+*  THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
+*
+*****************************************************************************/
+
+/*****************************************************************************
+ *
+ * Filename:
+ * ---------
+ *   snd_effect.c
+ *
+ * Project:
+ * --------
+ *   Maui_sw
+ *
+ * Description:
+ * ------------
+ *   Streaming Background Sound Playback.
+ *   Play 8kHz mono linear PCM in TCH or idle mode.
+ *
+ * Author:
+ * -------
+ * -------
+ *============================================================================
+ *             HISTORY
+ * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
+ *------------------------------------------------------------------------------
+ * removed!
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+ *------------------------------------------------------------------------------
+ * Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
+ *============================================================================
+ ****************************************************************************/
+
+#include "kal_public_api.h"
+#include "kal_general_types.h"
+#include "sync_data.h"
+
+#include "kal_trace.h"
+#include "l1sp_trc.h"
+
+
+#include "am.h"
+//#include "speech_def.h"
+#include "afe_def.h" // for output device setting
+#include "sp_drv.h"
+
+#include "sal_exp.h"
+
+#define DSP_BGS_UP_DOWN_INT_SEPERATE
+
+/************************** Constants ***************************************/
+// #define DP_BUFFER_DEFAULT_LEN       4096   /* The frame size of DSP. */ 
+#define DSP_BUFFER_LEN_NB              160 //unit is sample (16bit)
+#define DSP_BUFFER_LEN_WB              320 //unit is sample (16bit)
+#define DSP_BUFFER_LEN_MAX					320 //unit is sample (16bit)
+
+/* DSP Sound Effect State */
+#define DP_BGSND_STATE_IDLE           0     /* MCU: 0 -> 1 */
+#define DP_BGSND_STATE_READY          1     /* DSP: 1 -> 2 */
+#define DP_BGSND_STATE_PLAYING        2     /* MCU: 2 -> 3 */
+#define DP_BGSND_STATE_STOP           3     /* DSP: 3 -> 0 */
+
+//#define SND_CHECK_DATA
+
+#define SND_GAIN_CONFIG   1 /* 0: right shamt, 1: multiplier */
+
+#define BGSND_BUF_SIZE 2560 // using in 16 bit 
+#define BGSND_BUF_PTR_DIFF 2
+
+typedef enum {
+	BGSND_STATE_IDLE = 0,
+	BGSND_STATE_RUN, 
+	BGSND_STATE_STOP,
+	BGSND_STATE_CLOSE,
+}BGSND_STATE_TYPE;
+
+/*********** Structure *******************************************************/
+
+typedef struct{
+
+	BGSND_STATE_TYPE state;
+	
+	kal_bool fULSPH;
+	kal_bool fDLSPH;
+	
+	kal_bool isDlHisrCome;
+	kal_bool isUlHisrCome;
+	
+	void (*bgSnd_hisrHandler)(void);
+	void (*bgSnd_offHandler)(void);	
+	
+	kal_uint16 aud_id;
+	kal_timerid timer;
+	kal_uint16 endCount;
+	
+	kal_uint16 ULGain;
+	kal_uint16 DLGain;
+	kal_uint16 dspLastSample;
+	
+	kal_uint16 *pBuf;
+
+	
+	kal_int32 bufSize; // unit is 16 bit (sample)
+	kal_int32 bufWrite; // unit is 16 bit
+	kal_int32 bufRead; // unit is 16 bit
+}BGSND_T; 
+
+/*********** variable ********************************************************/
+
+static BGSND_T bgSnd;
+
+static kal_uint16 bgSndBuf[BGSND_BUF_SIZE];
+
+/*********** internal fucntion  **********************************************/
+
+static void bgsndUpdateMixer()
+{
+   if ( AM_IsSpeechOn() ) {
+   	SAL_Bgsnd_Config(bgSnd.ULGain, bgSnd.DLGain, bgSnd.fULSPH, bgSnd.fDLSPH);
+   } else {
+	   SAL_Bgsnd_Config(bgSnd.ULGain, bgSnd.DLGain, 0, 0);
+   }
+
+}
+
+/**
+	@return: size is 16-bit, available PCM size
+*/
+static int32 bgsndGetDataCount(void)
+{
+	int32 count; 
+   // int32 count = (int32)ihdl->mh.rbInfo.write - (int32)ihdl->mh.rbInfo.read;
+	if(bgSnd.bufWrite<bgSnd.bufRead){
+		count = (bgSnd.bufSize - BGSND_BUF_PTR_DIFF)+bgSnd.bufWrite - bgSnd.bufRead;
+	} else {
+		count = bgSnd.bufWrite - bgSnd.bufRead;
+	}
+
+	if( count > BGSND_BUF_PTR_DIFF) {
+		count -= BGSND_BUF_PTR_DIFF;
+	} else {
+		count = 0;
+	}
+
+	if(count&1){
+		count = count -1;
+	}
+	return count;
+	/*
+   int32 count = bgSnd.bufWrite - bgSnd.bufRead;
+   if( count < 0 )
+      count += (bgSnd.bufSize - BGSND_BUF_PTR_DIFF );
+	else if( count > 2)
+		count -= BGSND_BUF_PTR_DIFF;
+	else 
+		count = 0;
+   return count;
+   	*/
+}
+/*
+static kal_int16 tone1k_16kSR[320] = {
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05,
+0x0000, 0x30FC, 0x5A82, 0x7641, 0x7FFF, 0x7641, 0x5A82, 0x30FB, 
+0x0001, 0xCF05, 0xA57E, 0x89C0, 0x8001, 0x89BF, 0xA57E, 0xCF05
+};
+
+*/
+static void bgsnd_WriteToDSP(void)
+{
+   uint16 dsp_buf_len, dsp_buf_len_Ul;
+   uint16 *dataPtr;
+	volatile uint16 *toPtr;
+	volatile uint16 *toPtr_Ul;
+   int32 count, segment, i;
+	bool isWb, isWb_Ul;
+
+/*
+	¡VSph_Band_Flag 
+	¡EBit 0: Sch band (0/1 : Nb/Wb) 
+	¡EBit 1: Cod band (0/1 : Nb/Wb) 
+	¡EBit 2: VBI band (0/1 : Nb/Wb) 
+	¡EBit 3: BT band (0/1 : Nb/Wb) 
+	MT6280 0x2FBF
+	MT6589 0x32F1
+	dm5
+*/
+
+	// get current buffer data length in two sample alight. (16k sampling rate)
+	count = bgsndGetDataCount();
+	
+	//set up the DSP address and pointers
+   dsp_buf_len = SAL_Bgsnd_GetDataLen_DL();
+#ifdef DSP_BGS_UP_DOWN_INT_SEPERATE
+	dsp_buf_len_Ul = SAL_Bgsnd_GetDataLen_UL();
+#else
+	dsp_buf_len_Ul = dsp_buf_len;
+#endif
+	
+	if(dsp_buf_len == DSP_BUFFER_LEN_WB)
+		isWb = true;
+	else if(dsp_buf_len == DSP_BUFFER_LEN_NB){
+		isWb = false;
+//		count >>= 1;
+	}
+	else {
+		ASSERT_REBOOT(0);
+		isWb = false; 
+	}
+
+	if(dsp_buf_len_Ul == DSP_BUFFER_LEN_WB)
+		isWb_Ul= true;
+	else if(dsp_buf_len_Ul == DSP_BUFFER_LEN_NB){
+		isWb_Ul= false;
+	}
+	else {
+		ASSERT_REBOOT(0);	
+		isWb_Ul = false;
+	}
+		
+	toPtr = SAL_Bgsnd_GetBuf_DL();
+#ifdef DSP_BGS_UP_DOWN_INT_SEPERATE
+	toPtr_Ul = SAL_Bgsnd_GetBuf_UL();
+#else
+	toPtr_Ul = toPtr; 
+#endif
+
+	MD_TRC_L1SND_DSP_BUFFER_INFO(count, toPtr, dsp_buf_len);
+#ifdef DSP_BGS_UP_DOWN_INT_SEPERATE
+	MD_TRC_L1SND_DSP_BUFFER_INFO(-1, toPtr_Ul, dsp_buf_len_Ul);
+#else
+	MD_TRC_L1SND_DSP_BUFFER_INFO(count, toPtr_Ul, dsp_buf_len_Ul);
+#endif
+
+
+   if (count > DSP_BUFFER_LEN_MAX)
+      count = DSP_BUFFER_LEN_MAX;
+
+	if(count > 0) {
+
+	   /* First Segemnt */
+		if(bgSnd.bufWrite < bgSnd.bufRead) {
+		   segment = (bgSnd.bufSize - bgSnd.bufRead);
+		} else {
+			segment = (bgSnd.bufWrite - bgSnd.bufRead);
+		}
+
+		if(segment&1){ // keep two sample alight
+			segment =segment - 1;
+		}
+
+		/*
+		if(isNb){ // 8k			
+			if (segment > (count<<1))
+				segment = (count<<1);
+			
+		}else { // 16 k
+			if (segment > count)
+				segment = count;
+		}
+		*/
+		if (segment > count)
+			segment = count;
+			   
+	   if (segment > 0) {
+			
+			// kal_dev_trace(TRACE_STATE, L1SND_FILLBUFFER, segment);
+	      dataPtr = &(bgSnd.pBuf[bgSnd.bufRead]);
+	   
+	      for (i=segment; i>0; (i-=2)) {
+				// first sample
+	         *toPtr++ = *dataPtr;
+				*toPtr_Ul++ = *dataPtr++;
+
+				// second sample
+				if(isWb) {
+					*toPtr++ = *dataPtr;
+				}
+				if(isWb_Ul) {
+					*toPtr_Ul++ = *dataPtr;
+				}
+				dataPtr++;
+	      }
+			Data_Sync_Barrier();
+
+	      bgSnd.dspLastSample = *(toPtr-1);
+
+	      bgSnd.bufRead += segment;
+	      if (bgSnd.bufRead >= bgSnd.bufSize)
+	         bgSnd.bufRead = (bgSnd.bufRead-bgSnd.bufSize);
+
+			MD_TRC_L1SND_FILLBUFFER(1, segment, bgSnd.bufRead, bgSnd.bufWrite);
+	   }
+
+	   /* Second Segment */
+		/*
+		if(isNb){ // 8k	
+			segment = (count<<1) - segment;
+		} else {
+		   segment = count - segment;
+		}
+		*/
+		segment = count - segment;
+
+	   if (segment > 0) {
+	      // kal_dev_trace(TRACE_STATE, L1SND_FILLBUFFER, segment);
+	      // dataPtr = bgSnd.pBuf;
+	      dataPtr = &(bgSnd.pBuf[bgSnd.bufRead]);
+	      for (i=segment; i>0; (i-=2)) {
+	         // first sample
+	         *toPtr++ = *dataPtr;
+				*toPtr_Ul++ = *dataPtr++;
+				
+				// second sample
+				if(isWb) {
+					*toPtr++ = *dataPtr;
+				}
+				if(isWb_Ul) {
+					*toPtr_Ul++ = *dataPtr;
+				}
+				dataPtr++;
+	      }
+         Data_Sync_Barrier();
+
+	      bgSnd.dspLastSample = *(toPtr-1);
+	      bgSnd.bufRead += segment;
+	      if (bgSnd.bufRead >= bgSnd.bufSize)
+	         bgSnd.bufRead = (bgSnd.bufRead-bgSnd.bufSize);
+
+			MD_TRC_L1SND_FILLBUFFER(2, segment, bgSnd.bufRead, bgSnd.bufWrite);	
+	   }
+		
+	}
+
+
+   /* Put silence (last sample) if MCU buffer is empty */
+   if (count < DSP_BUFFER_LEN_MAX) {
+		
+      kal_uint16 last_sample;
+      
+      last_sample = bgSnd.dspLastSample;      
+      // segment = dsp_buf_len - count;
+      segment = DSP_BUFFER_LEN_MAX - count;
+		MD_TRC_L1SND_PUT_SILENCE(segment, last_sample);
+
+		/*
+      for (i=segment; i>0; i--) {
+         *toPtr++ = last_sample;
+      } 
+		*/
+      for (i=segment; i>0; (i-=2)) {
+         // first sample
+         *toPtr++ = last_sample;
+			*toPtr_Ul++ = last_sample;
+			
+			// second sample
+			if(isWb) {
+				*toPtr++ = last_sample;
+			}
+			if(isWb_Ul) {
+				*toPtr_Ul++ = last_sample;
+			}
+
+      }
+      Data_Sync_Barrier();
+   }
+}
+
+
+void bgsndHisr( void *pram )
+{
+
+	// gain and setting update
+   bgsndUpdateMixer();
+
+	// handle extra notify and closing state
+	if ((BGSND_STATE_RUN != bgSnd.state) && (BGSND_STATE_STOP !=bgSnd.state))
+		return;
+   // if ( ihdl->end_status != MEDIA_NONE )
+   //   return;
+
+   if(!SAL_Bgsnd_IsRunning())
+      return;
+
+   bgsnd_WriteToDSP();
+
+	if( bgSnd.bgSnd_hisrHandler != NULL) {
+		bgSnd.bgSnd_hisrHandler();
+	}
+}
+
+#ifdef DSP_BGS_UP_DOWN_INT_SEPERATE
+void bgsndDlHisr( void * param)
+{
+	if(true == bgSnd.isDlHisrCome) { 
+		MD_TRC_L1SND_REENTER_HISR(bgSnd.isDlHisrCome, bgSnd.isUlHisrCome);		
+	} else {
+		bgSnd.isDlHisrCome = true;
+		
+		if(bgSnd.isUlHisrCome == bgSnd.isDlHisrCome) {
+			bgsndHisr(param);
+			bgSnd.isUlHisrCome = false;
+			bgSnd.isDlHisrCome = false;
+		} 
+	}
+}
+
+void bgsndUlHisr( void * param)
+{
+	if(true == bgSnd.isUlHisrCome) { 
+		MD_TRC_L1SND_REENTER_HISR(bgSnd.isDlHisrCome, bgSnd.isUlHisrCome);
+	} else {
+		bgSnd.isUlHisrCome = true;
+		
+		if(bgSnd.isUlHisrCome == bgSnd.isDlHisrCome) {
+			bgsndHisr(param);
+			bgSnd.isUlHisrCome = false;
+			bgSnd.isDlHisrCome = false;
+		} 
+	}
+
+}
+
+#endif // DSP_BGS_UP_DOWN_INT_SEPERATE
+
+void bgsndOnHandler(void)
+{
+		
+	AM_SND_PlaybackOn();
+	SAL_Bgsnd_SetInit();
+	//*DSP_SOUND_EFFECT_CTRL = DP_BGSND_STATE_READY;
+	{
+		uint32 I;
+		for( I = 0; ; I++ ) {
+			//if( *DSP_SOUND_EFFECT_CTRL == DP_BGSND_STATE_PLAYING)
+			if(SAL_Bgsnd_IsRunning())
+				break;
+			ASSERT_REBOOT( I < 20 );
+			kal_sleep_task( AUD_1TICK(2) );
+		}
+	}
+}
+
+void bgsndOffHandler(void)
+{
+
+	if(BGSND_STATE_STOP != bgSnd.state) {
+		return;
+	}
+	
+	uint32 I;
+	if(SAL_Bgsnd_IsRunning())
+		SAL_Bgsnd_SetFinal();
+	for ( I = 0; ; I++ ) {
+		if ( SAL_Bgsnd_IsIdle())	 /* DSP returns to idle state */
+			break;
+		ASSERT_REBOOT( I < 20 );
+		kal_sleep_task( AUD_1TICK(2) );
+	}
+
+	
+	AM_SND_PlaybackOff( true );
+}
+
+void bgsndTimerCallback(void)
+{
+	L1Audio_SetEvent(bgSnd.aud_id, NULL);
+}
+
+/**
+	Run on AUDIO task
+*/
+void bgsndEventHandler(void)
+{
+	MD_TRC_L1SND_ENTER_EVENT_HANDLER(bgSnd.state);
+	
+	switch (bgSnd.state)
+	{
+		case BGSND_STATE_STOP: 
+		{
+			// int32 I = 0;
+			// Flush and  Disable DSP. 
+			//while( I++ >= 0 ){
+			while(bgSnd.endCount++ >=0){
+				int32 count = bgsndGetDataCount();
+
+				// if( I >=40 ){
+				if(bgSnd.endCount >=20) {
+					MD_TRC_L1SND_STOP_FLUSH_LEAVE(count);
+					break;
+				}
+				
+				if( count > BGSND_BUF_PTR_DIFF ){
+					MD_TRC_L1SND_STOP_FLUSH_COUNT(count);
+					// kal_sleep_task( AUD_1TICK(1) );
+					kal_set_timer(bgSnd.timer, (kal_timer_func_ptr)(bgsndTimerCallback), NULL, AUD_1TICK(2), AUD_1TICK(0));
+					return;
+				}
+				
+			}
+			//if ( *DSP_SOUND_EFFECT_CTRL == DP_BGSND_STATE_PLAYING ) {
+			//	*DSP_SOUND_EFFECT_CTRL = DP_BGSND_STATE_STOP;		 /* give ABORT command to the DSP */
+			//}
+			kal_cancel_timer(bgSnd.timer);
+			bgsndOffHandler();
+
+			if(NULL != bgSnd.bgSnd_offHandler){
+				bgSnd.bgSnd_offHandler();
+			}
+		}
+			break;
+		default: 
+			break;
+	}
+
+	
+}
+/*===========================================================================*/
+
+
+/**
+	@srcBuf:
+	@bufLen: unit is byte
+*/
+void BGSND_WriteData(kal_uint8 *srcBuf, kal_int32 bufLen)
+{
+	int32 freeLen; 
+	int32 srcBufLen = bufLen >> 1; // unit i s word
+	int32 currentRead = bgSnd.bufRead; 
+	
+	if(currentRead > bgSnd.bufWrite || currentRead < BGSND_BUF_PTR_DIFF) {	// one segment
+		if(currentRead > bgSnd.bufWrite){
+			freeLen=currentRead - bgSnd.bufWrite-BGSND_BUF_PTR_DIFF;
+		}else {
+			freeLen=bgSnd.bufSize - bgSnd.bufWrite-BGSND_BUF_PTR_DIFF;
+		}
+
+		MD_TRC_L1SND_WRITE_DATA(1, srcBufLen, freeLen, bgSnd.bufRead, bgSnd.bufWrite+srcBufLen); /* using write information which is after memory copy*/
+		
+		ASSERT(srcBufLen <= freeLen); // unit is 2 byte
+		memcpy(bgSnd.pBuf+bgSnd.bufWrite, srcBuf, srcBufLen*sizeof(uint16));		
+	
+		bgSnd.bufWrite += srcBufLen;
+
+		//kal_prompt_trace(MOD_L1SP, "[pDebug]BGSND_WriteData1, bgSnd.bufRead=%d, bgSnd.bufWrite=%d", bgSnd.bufRead, bgSnd.bufWrite);
+	
+
+	} else { // two segment
+		
+		int32 segment; 
+		kal_uint8 *p2SrcBuf;
+
+		freeLen= currentRead + bgSnd.bufSize - bgSnd.bufWrite-BGSND_BUF_PTR_DIFF;
+
+		MD_TRC_L1SND_WRITE_DATA(2, srcBufLen, freeLen, 0, 0); 
+		ASSERT(srcBufLen <= freeLen);
+
+		p2SrcBuf = srcBuf;
+		segment = bgSnd.bufSize - bgSnd.bufWrite; // bug
+		if(segment > srcBufLen){
+			segment = srcBufLen;
+		}
+
+		if(segment>0) { //first segment
+
+			// kal_prompt_trace(MOD_L1SP, "xbgs temp3: bgSnd.pBuf+bgSnd.bufWrite=%x, p2SrcBuf=%x, segment*sizeof(kal_uint16)=%x", 
+			// 	bgSnd.pBuf+bgSnd.bufWrite, p2SrcBuf, segment*sizeof(kal_uint16));
+		
+			memcpy(bgSnd.pBuf+bgSnd.bufWrite, p2SrcBuf, segment*sizeof(kal_uint16));		
+			
+			//update pointer
+			p2SrcBuf = srcBuf + segment*sizeof(kal_uint16); 
+			bgSnd.bufWrite += segment;
+			if(bgSnd.bufWrite>=bgSnd.bufSize){				
+				bgSnd.bufWrite = 0; 
+			}
+
+			// kal_prompt_trace(MOD_L1SP, "[pDebug]BGSND_WriteData2-1, bgSnd.bufRead=%d, bgSnd.bufWrite=%d", bgSnd.bufRead, bgSnd.bufWrite);
+			MD_TRC_L1SND_WRITE_DATA(3, 0, 0, bgSnd.bufRead, bgSnd.bufWrite);
+	
+			segment = srcBufLen - segment; 
+		}
+
+		if(segment>0) { //second segement
+			// kal_prompt_trace(MOD_L1SP, "xbgs temp5: bgSnd.pBuf=%x, p2SrcBuf=%x, segment*sizeof(kal_uint16=%x)", 
+			// 	bgSnd.pBuf, p2SrcBuf, segment*sizeof(kal_uint16));
+		
+			memcpy(bgSnd.pBuf, p2SrcBuf, segment*sizeof(kal_uint16));	
+			bgSnd.bufWrite = segment;
+
+			// kal_prompt_trace(MOD_L1SP, "[pDebug]BGSND_WriteData2-2, bgSnd.bufRead=%d, bgSnd.bufWrite=%d", bgSnd.bufRead, bgSnd.bufWrite);
+			MD_TRC_L1SND_WRITE_DATA(4, 0, 0, bgSnd.bufRead, bgSnd.bufWrite);
+	
+		}
+	}
+
+	/*
+	freeLen=bgSnd.bufRead - bgSnd.bufWrite-1;
+	if(freeLen<0){ // two segment
+		int32 segment; 
+		kal_uint8 *p2SrcBuf;
+		
+		freeLen += bgSnd.bufSize;
+		
+		
+				p2SrcBuf = srcBuf;
+				segment = bgSnd.bufSize - bgSnd.bufWrite; 
+				memcpy(bgSnd.pBuf+bgSnd.bufWrite, p2SrcBuf, segment*sizeof(kal_uint16));		
+				//update pointer
+				p2SrcBuf = srcBuf + (segment<<1); 
+				bgSnd.bufWrite = 0; 
+		
+				
+				segment = srcBufLen - segment; 
+				memcpy(bgSnd.pBuf+bgSnd.bufWrite, p2SrcBuf, segment*sizeof(kal_uint16));	
+				bgSnd.bufWrite = segment;
+				
+			} else { // one segment
+				ASSERT(bufLen <= freeLen); 
+				memcpy(bgSnd.pBuf+bgSnd.bufWrite, srcBuf, bufLen); 	
+		
+				// for debug
+				kal_prompt_trace(MOD_L1SP, "bgs temp: bgSnd.pBuf=%x, bgSnd.bufWrite=%x,  bgSnd.pBuf+bgSnd.bufWrite = %x", 
+					bgSnd.pBuf, bgSnd.bufWrite, bgSnd.pBuf+bgSnd.bufWrite);
+				
+				bgSnd.bufWrite += (bufLen>>1);
+		
+				// for debg
+				kal_prompt_trace(MOD_L1SP, "bgs temp2: new bgSnd.bufWrite = %x", bgSnd.bufWrite);
+		
+			}
+			*/
+		
+}
+
+/**
+	@return: size is 16-bit (2byte)
+*/
+int32 BGSND_GetFreeSpace(void)
+{
+	int32 count;
+
+	count = bgSnd.bufSize + bgSnd.bufRead - bgSnd.bufWrite-BGSND_BUF_PTR_DIFF; // (int32)ihdl->mh.rbInfo.read - (int32)ihdl->mh.rbInfo.write - 1;
+	if( count > bgSnd.bufSize )
+	  count = count - bgSnd.bufSize;
+	return count;
+}
+
+/**
+	The function sets the playback mode.
+	
+	@bULSPHFlag: Mixer switch for uplink speech, 1 for SPH+background Sound, 0 for background sound only
+	@ULSNDGain: Sound effect gain for uplink mixer
+*/
+void BGSND_ConfigULMixer(kal_bool bULSPHFlag, kal_int8 ULSNDGain )
+{
+#if defined(__ENABLE_SPEECH_DVT__)
+    ULSNDGain = 7;
+#endif // defined(__ENABLE_SPEECH_DVT__)
+	MD_TRC_L1SND_CONFIG_ULMIXER(bULSPHFlag, ULSNDGain); 
+
+	ASSERT(ULSNDGain>=0 && ULSNDGain<=7);
+	if( ULSNDGain == 0 )
+		bgSnd.ULGain = 0;
+	else {
+		bgSnd.ULGain = (kal_int16)(32767 >> (7 - ULSNDGain));
+	}
+	bgSnd.fULSPH = bULSPHFlag;
+}
+
+
+/**
+	The function sets the playback mode.
+	
+	@bDLSPHFlag: Mixer switch for downlink speech, 1 for SPH+background Sound, 0 for background sound only
+	@DLSNDGain: Sound effect gain for downlink mixer
+*/
+void BGSND_ConfigDLMixer(kal_bool bDLSPHFlag, kal_int8 DLSNDGain )
+{
+#if defined(__ENABLE_SPEECH_DVT__)
+    DLSNDGain = 7;
+#endif // defined(__ENABLE_SPEECH_DVT__)
+	MD_TRC_L1SND_CONFIG_DLMIXER(bDLSPHFlag, DLSNDGain); 
+
+	ASSERT(DLSNDGain>=0 && DLSNDGain<=7);
+	if( DLSNDGain == 0)
+		bgSnd.DLGain = 0;
+	else {
+		bgSnd.DLGain = (kal_int16)(32767 >> (7 - DLSNDGain));
+	}
+	bgSnd.fDLSPH = bDLSPHFlag;
+}
+
+/**
+
+ The function starts the background sound playback of the media handle.
+
+ @bgSnd_hdlr: handler
+ @ULGainLevel: uplink gain level, from 0~7
+ @DLGainLevel: downlink gain level, from 0~7
+
+*/
+void BGSND_Start(void (*bgSnd_hisrHandler)(void), void (*bgSnd_offHandler)(void),
+	kal_uint8 ULGainLevel , kal_uint8 DLGainLevel)
+{
+	MD_TRC_L1SND_ENTER_BGSND_START(); 
+	
+	// clean up 
+	bgSnd.dspLastSample = 0;
+	bgSnd.endCount = 0;
+	
+	// buffer reset
+	memset(bgSndBuf, 0, sizeof(kal_uint16)*BGSND_BUF_SIZE);
+	bgSnd.pBuf = bgSndBuf;
+	bgSnd.bufSize = BGSND_BUF_SIZE;
+	bgSnd.bufRead = 0;
+	bgSnd.bufWrite = BGSND_BUF_PTR_DIFF;
+
+	// clear hisr flag
+	bgSnd.isDlHisrCome = false;
+	bgSnd.isUlHisrCome = false;
+	
+	// lock DSP for sherif writing.	
+	L1Audio_SetFlag( bgSnd.aud_id ); // REIMIND: Before Locking SleepMode, to access DSP sherrif tasks much time. So access DSP must be after SetFlag1
+	
+	// L1Audio_SetEventHandler(bgSnd.aud_id, BGSND_eventHandler );
+	bgSnd.bgSnd_hisrHandler = bgSnd_hisrHandler;
+#ifdef DSP_BGS_UP_DOWN_INT_SEPERATE
+	L1Audio_HookHisrHandler(D2C_SOUND_EFFECT_INT_ID_DL, bgsndDlHisr, 0);  
+	L1Audio_HookHisrHandler(D2C_SOUND_EFFECT_INT_ID_UL, bgsndUlHisr, 0);  
+#else
+	L1Audio_HookHisrHandler(D2C_SOUND_EFFECT_INT_ID_DL, bgsndHisr, 0);  	
+#endif
+
+	bgSnd.bgSnd_offHandler = bgSnd_offHandler;
+
+	// gain setting and update
+	if(AM_IsSpeechOn()){
+		BGSND_ConfigULMixer(KAL_TRUE, ULGainLevel);
+		BGSND_ConfigDLMixer(KAL_TRUE, DLGainLevel);
+	} else {
+		BGSND_ConfigULMixer(KAL_FALSE, ULGainLevel);
+		BGSND_ConfigDLMixer(KAL_FALSE, DLGainLevel);
+	}
+	bgsndUpdateMixer();
+	 
+
+	// Before dynamic download, all application should be off. 
+	// But background sound do not need to dynamic download, so the following is unnecessary.
+	// KT_StopAndWait();
+
+	// turn on.
+	bgsndOnHandler();
+
+	// L1SP_Register_BgsService(bgsndOnHandler, bgsndOffHandler);
+	bgSnd.state = BGSND_STATE_RUN;
+}
+
+/*
+ * Description
+ * ---------
+ *   The function stops the background sound playback of the media handle.
+ *
+ * Syntax
+ * ---------
+ *   void BGSND_Stop();
+ *
+ * where
+ *   hdl   The media handle
+ *
+ * Return Value
+ * ---------
+ *   None
+ */
+void BGSND_Stop(void)
+{
+
+
+
+	MD_TRC_L1SND_ENTER_BGSND_STOP(); 
+
+	/*	
+	if ( !L1Audio_CheckFlag( bgSnd.aud_id ) )
+		return;
+	*/
+
+	// unregister service
+	// L1SP_UnRegister_BgsService();
+
+	bgSnd.state = BGSND_STATE_STOP;
+
+	// set event to trigger close process
+	L1Audio_SetEvent(bgSnd.aud_id, NULL);
+}
+
+void BGSND_Close(void)
+{
+	
+	L1Audio_ClearFlag( bgSnd.aud_id );
+
+#ifdef DSP_BGS_UP_DOWN_INT_SEPERATE
+	L1Audio_UnhookHisrHandler(D2C_SOUND_EFFECT_INT_ID_DL);  
+	L1Audio_UnhookHisrHandler(D2C_SOUND_EFFECT_INT_ID_UL);  
+#else
+	L1Audio_UnhookHisrHandler(D2C_SOUND_EFFECT_INT_ID_DL);
+#endif 
+
+	// reset the pointer
+	bgSnd.pBuf = NULL;
+	bgSnd.bufSize = 0;
+	bgSnd.bgSnd_hisrHandler = NULL;	
+
+
+	bgSnd.state = BGSND_STATE_IDLE;
+}
+
+
+/* 
+ * Description
+ * ---------
+ *   The function sets the output device.
+ *
+ * Syntax
+ * ---------
+ *   void BGSND_SetOutputDevice( kal_uint8 device );
+ *
+ * where
+ *   device   The output device (L1SP_SPEAKER1, L1SP_SPEAKER2, L1SP_LOUD_SPEAKER)
+ *
+ * Return Value
+ * ---------
+ *   None
+ 
+void BGSND_SetOutputDevice( kal_uint8 device )
+{
+	//if( !AM_IsSpeechOn() )
+#ifdef ANALOG_AFE_PATH_EXIST   	
+		AFE_SetOutputDevice( L1SP_SND_EFFECT, device );
+#endif
+}
+*/
+
+
+void BGSND_INIT()
+{	
+	memset(&bgSnd, 0, sizeof(BGSND_T));
+	
+	// get audio ID
+	bgSnd.aud_id = L1Audio_GetAudioID(); 
+	L1Audio_SetEventHandler( bgSnd.aud_id, (L1Audio_EventHandler)bgsndEventHandler );
+	bgSnd.timer = kal_create_timer("bgSnd"); 
+}
+