speech_decode_frame_init.asm

基于TMS320F2812的AMR+RS编解码+OFDM调制解调源程序。是stand alone运行版本

*****************************************************************************
** Description:     Speech_Decode_Frame_init() in sp_dec.c                 **
**                                                                         **
** Inputs                                                                  **
**                                                                         **
**   Speech_Decode_FrameState *state                                       **
**                                                                         **
** Outputs:                                                                **
**                                                                         **
**   Speech_Decode_FrameState *state                                       **
**                                                                         **
** Return value :       		                                           **
**                                                                         **
** Attribute    :       Cycles: 40        Pm: 388                          **
**                      Modified Registers:  acc,p,t,ar0,xar2-4            **
**                                                                         **
** Programmer   :       YANG zhiwei                                        **
*****************************************************************************

      .global _Speech_Decode_Frame_init
      
      .ref  _copy
      
      .ref 	ltpGainHistory
      .ref	past_r_q
      .ref	past_lsf_q
      .ref	dec_past_qua_en
      .ref	dec_past_qua_en_MR122
      .ref	cbGainHistory
      .ref	hangVar
      .ref	hangCount
      .ref	lsp_meanSave
      .ref	gainMem
      .ref	prevState
      .ref	prevCbGain
      .ref	lockFull
      .ref	onset
      .ref	dec_exc
      .ref	dec_old_exc
      .ref	dec_mem_syn
      .ref	dec_sharp
      .ref	old_T0
      .ref	dec_lsp_old
      .ref	mem_pre
	  .ref	past_gain	      
      .ref	mem_syn_pst
      .ref	res2
      .ref	synth_buf
      .ref	dec_y2_hi
      .ref	dec_y2_lo
      .ref	dec_y1_hi
      .ref	dec_y1_lo
      .ref	dec_x0
      .ref	dec_x1
            
      .ref	dec_mean_lsf
      .ref	lsp_init_data
      
      .ref	M
      .ref	MIN_ENERGY
      .ref	MIN_ENERGY_MR122
      .ref	L_CBGAINHIST
      .ref	PHDGAINMEMSIZE
      .ref	PIT_MAX
      .ref	L_INTERPOL
      .ref	SHARPMIN
      .ref	L_SUBFR
      .ref	L_FRAME

_Speech_Decode_Frame_init:
		;Decoder_amr_init(&s->decoder_amrState)
		movl	xar2,#ltpGainHistory			;xar2 point to s->decoder_amrState->ltpGainHistory
		rpt		#9-1
		||mov	*xar2++,#0						;s->decoder_amrState->ltpGainHistory[i] = 0
	    	;D_plsf_init(&decoder_amrState->lsfState)
	  		movl	xar2,#past_r_q					;xar2 point to s->decoder_amrState->lsfState->past_r_q
	  		rpt		#M-1
	  		||mov	*xar2++,#0						;s->decoder_amrState->lsfState->past_r_q[i] = 0
	  	
	  		movl	xar2,#dec_mean_lsf
	  		movl	xar3,#past_lsf_q				;xar3 point to s->decoder_amrState->lsfState->past_lsf_q
	  		mov		ar1,#M
	  		lcr		_copy							;Copy(dec_mean_lsf, &s->decoder_amrState->lsfState->past_lsf_q[0],M)
	  	
	  		;gc_pred_init(&decoder_amrState->pred_state)
	  		movl	xar2,#dec_past_qua_en			;xar2 point to s->decoder_amrState->pred_state->past_qua_en
	  		rpt		#4-1
	  		||mov	*xar2++,#MIN_ENERGY
	  		
	  		movl	xar2,#dec_past_qua_en_MR122			;xar2 point to s->decoder_amrState->pred_state->past_qua_en_MR122
	  		rpt		#4-1
	  		||mov	*xar2++,#MIN_ENERGY_MR122
	  		;Cb_gain_average_init(&decoder_amrState->Cb_gain_averState)
	  		movl	xar2,#cbGainHistory					;xar2 point to s->decoder_amrState->Cb_gain_averState->cbGainHistory
	  		rpt		#L_CBGAINHIST-1
	  		||mov	*xar2++,#0
	  		
	  		movl	xar2,#hangVar						;xar2 point to s->decoder_amrState->Cb_gain_averState->hangVar
	  		mov		*xar2,#0
	  		
	  		movl	xar2,#hangCount						;xar2 point to s->decoder_amrState->Cb_gain_averState->hangCount
	  		mov		*xar2,#0
	  		;lsp_avg_init(&decoder_amrState->lsp_avg_st)
	  		movl	xar2,#dec_mean_lsf
	  		movl	xar3,#lsp_meanSave					;xar3 point to s->decoder_amrState->lsp_avg_st->lsp_meanSave
	  		mov		ar1,#M	
	  		lcr		_copy
	  		;ph_disp_init(&decoder_amrState->ph_disp_st)
			movl	xar2,#gainMem						;xar2 point to s->decoder_amrState->ph_disp_st->gainMem
	  		rpt		#PHDGAINMEMSIZE-1
	  		||mov	*xar2++,#0
	  		
	  		movl	xar2,#prevState						;xar2 point to s->decoder_amrState->ph_disp_st->prevState
	  		mov		*xar2,#0
	
			movl	xar2,#prevCbGain					;xar2 point to s->decoder_amrState->ph_disp_st->prevCbGain
	  		mov		*xar2,#0
	  		
			movl	xar2,#lockFull						;xar2 point to s->decoder_amrState->ph_disp_st->lockFull
	  		mov		*xar2,#0	
	  		
	  		movl	xar2,#onset							;xar2 point to s->decoder_amrState->ph_disp_st->onset
	  		mov		*xar2,#0
	  		
	  	movl	xar2,#dec_exc+1						;xar2 point to s->decoder_amrState->exc
	  	movl	xar3,#dec_old_exc + PIT_MAX + L_INTERPOL		
	  	movl	*xar2,xar3							;s->decoder_amrState->exc = s->decoder_amrState->old_exc + PIT_MAX + L_INTERPOL
	  	
	  	movl	xar2,#dec_old_exc					;xar2 point to s->decoder_amrState->old_exc
	  	rpt		#PIT_MAX + L_INTERPOL - 1
	  	||mov	*xar2++,#0

		movl	xar2,#dec_mem_syn					;xar2 point to s->decoder_amrState->mem_syn
	  	nop
	  	rpt		#M - 1
	  	||mov	*xar2++,#0
	  	
	  	movl	xar2,#dec_sharp						;xar2 point to s->decoder_amrState->sharp
	  	mov		*xar2,#SHARPMIN
	  	
	  	movl	xar2,#old_T0						;xar2 point to s->decoder_amrState->old_T0
	  	mov		*xar2,#40
	  	
	  	movl	xar2,#lsp_init_data					;xar2 point to lsp_init_data
	  	movl	xar3,#dec_lsp_old					;xar3 point to s->decoder_amrState->lsp_old
	  	mov		ar1,#M
	  	lcr		_copy								;Copy(lsp_init_data, &s->decoder_amrState->lsp_old[0], M)
	  	  
	  	;Post_Filter_init(&s->post_state)
	  	
	  		;preemphasis_init(&s->post_state->preemph_state)
	  		movl	xar2,#mem_pre              			;xar2 point to s->post_state->preemph_state->mem_pre
	  		mov		*xar2,#0
	  		;agc_init(&s->post_state->agc_state)
	  		movl	xar2,#past_gain						;xar2 point to s->post_state->preemph_state->past_gain
	  		mov		*xar2,#4096
	  			  		
	  	movl	xar2,#mem_syn_pst					;xar2 point to s->post_state->mem_syn_pst
	  	rpt		#M - 1
	  	||mov	*xar2++,#0
	  	
	  	movl	xar2,#res2							;xar2 point to s->post_state->res2
	  	rpt		#L_SUBFR - 1
	  	||mov	*xar2++,#0
	  	
		movl	xar2,#synth_buf						;xar2 point to s->post_state->synth_buf
	  	rpt		#L_FRAME + M - 1
	  	||mov	*xar2++,#0	  	
	  	;Post_Process_init(&s->postHP_state)
	  	movl	xar2,#dec_y2_hi            			;xar2 point to s->postHP_state->y2_hi
		mov		*xar2,#0	
	  	
	  	movl	xar2,#dec_y2_lo            			;xar2 point to s->postHP_state->y2_lo
		mov		*xar2,#0	
	  	
	  	movl	xar2,#dec_y1_hi            			;xar2 point to s->postHP_state->y1_hi
		mov		*xar2,#0	
	  	
	  	movl	xar2,#dec_y1_lo            			;xar2 point to s->postHP_state->y1_lo
		mov		*xar2,#0	
	  	
	  	movl	xar2,#dec_x0            			;xar2 point to s->postHP_state->x0
		mov		*xar2,#0	
	  	
	  	movl	xar2,#dec_x1            			;xar2 point to s->postHP_state->x1
		mov		*xar2,#0	
	  	
	  	lretr