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snd_background_music_thread_start:
	mov	eax,[background_music]
	mov	[wav_for_test],eax
	mov	ebx,eax
	add	ebx,1024
	mov	[wav_for_test_end],ebx
	call	initialize_sound_system
;--------------------------------------
.1:
	cmp	[music_flag],1
	je	.start
	
	mcall	5,50
	mcall	68,1
	jmp	snd_background_music_thread_start.1
;--------------------------------------		
.start:
	stdcall _PlayBuffer@8, [hBuff1], 0
	cmp	eax,-1
	je	snd_play_buffer_fail
	
;	DEBUGF	1, "Play Buffer successful EAX: %x\n",eax
;--------------------------------------		
.start_1:
	mov	eax,[background_music]
; check for correct data_offset
	push	eax
	add	eax,[data_offset]	
	sub	eax,4
	cmp	[eax],dword 'data'
	pop	eax
	je	@f

	mov	[wav_for_test],eax
	mov	ebx,eax
	add	ebx,1024
	mov	[wav_for_test_end],ebx
	call	find_data_offset
	cmp	[sound_flag],0
	jz	snd_background_music_thread_start.1	;.exit
;--------------------------------------
@@:
	add	eax,[data_offset]
	mov	ebx,[eax]
	add	eax,4
	mov	ebp,eax
	add	ebx,eax
;	DEBUGF	1, "start EAX: %x\n",eax
;--------------------------------------
.loop:	
	cmp	[music_flag],0
	jne	@f

	stdcall _StopBuffer@4, [hBuff1]
;	DEBUGF	1, "Stop Buffer EAX: %x\n",eax
	jmp	snd_background_music_thread_start.1
;--------------------------------------
@@:
; get event data from the driver
;	DEBUGF	1, "Get driver_notify_struct \n"
	push	ebx
	mcall	68,14,hBuff1_driver_notify_struct
	pop	ebx
;	DEBUGF	1, "Check to code \n"	
; проверка на code
	cmp	[hBuff1_driver_notify_struct], dword 0xFF000001
	jne 	@b
;	DEBUGF	1, "Check to stream \n"	
; проверка на stream
	mov	eax,[hBuff1_driver_notify_struct+8]
	cmp	eax,[hBuff1]
	jne	@b
;	DEBUGF	1, "Get buffer_offset \n"
; получить смещение в буффере
	mov	eax,[hBuff1_driver_notify_struct+12]
	mov	[hBuff1_buffer_offset],eax

;	DEBUGF	1, "src EBP: %x size EBX: %x\n",ebp,ebx
	stdcall _SetBuffer@16, [hBuff1], ebp, [hBuff1_buffer_offset], [hBuff1_buffer_size]	
	cmp	eax,-1
	je	snd_set_buffer_fail
	
;	DEBUGF	1, "Set Buffer successful EAX: %x\n",eax
	
;	add	ebp,8192*2
	add	ebp,[hBuff1_buffer_size]
	add	ebp,[hBuff1_buffer_size]
	cmp	ebx,ebp
	jbe	.start_1
	
;	sub	ebp,8192
	sub	ebp,[hBuff1_buffer_size]
	jmp	.loop
;------------------------------------------------------------------------------
initialize_sound_system:
	mov	[sound_flag],1

	stdcall	_InitSound@4,version
	cmp	eax,-1
	je	snd_init_fail
	
;	DEBUGF	1, "Sound init successful %x\n",eax
	mov	eax,[version]
	and	eax,0xffff
	cmp	eax,SOUND_VERSION
	jne	snd_version_fail

;	DEBUGF	1, "Sound version successful %x\n",eax

	stdcall	_test_wav@4,dword [wav_for_test]	;letter_1a
	test	eax,eax
	jz	snd_test_wav_fail
	
;	or	eax,PCM_OUT
	or	eax,PCM_RING
	mov	[snd_format],eax

;	DEBUGF	1, "Test wav successful %x\n",eax

	call	find_data_offset
	
	mov	al,[sound_flag]
	test	al,al
	jz	.exit
;--------------------------------------	
	stdcall	_CreateBuffer@12,[snd_format],0,hBuff1
	cmp	eax,-1
	je	snd_create_buffer_fail
	
;	DEBUGF	1, "Create Buffer 1 successful %x\n",eax

	stdcall	_GetBufferSize@8,[hBuff1],hBuff1_buffer_size
	
	cmp	eax,-1
	je	snd_get_buffer_size_fail
	
;	DEBUGF	1, "Get Buffer 1 size successful size: %x\n",[hBuff1_buffer_size]
	
	mov	ecx,[hBuff1_buffer_size]
	shr	ecx,1
	mov	[hBuff1_buffer_size],ecx
;--------------------------------------
.exit:
	ret
;------------------------------------------------------------------------------
find_data_offset:
	mov	esi,[wav_for_test]
;--------------------------------------
@@:
	cmp	[esi],dword 'data'
	je	@f

	inc	esi
	cmp	esi,[wav_for_test_end]
	jne	@b
	
;	DEBUGF	1, "find data offset fail\n"
	mov	[sound_flag],0
	ret
;--------------------------------------
@@:
	sub	esi,[wav_for_test]
	add	esi,4
	mov	[data_offset],esi
	ret
;------------------------------------------------------------------------------