从WAVE头文件中获取压缩方式

在解析WAV文件时，会从头文件中读取TAG值，表示当前文件的压缩格式，如该值为1，表示没有压缩，其它表示不同的压缩方式。如其中为6时，表示压缩方式是alaw

列表如下：

TAG值		音频描述
0	0x0000	Unknown
1	0x0001	Microsoft PCM
2	0x0002	Microsoft ADPCM
3	0x0003	IEEE Float
4	0x0004	Compaq VSELP
5	0x0005	IBM CVSD
6	0x0006	Microsoft ALAW
7	0x0007	Microsoft MULAW
16	0x0010	OKI ADPCM
17	0x0011	Intel DVI ADPCM
18	0x0012	Videologic MediaSpace ADPCM
19	0x0013	Sierra ADPCM
20	0x0014	Antex Electronics G.723 ADPCM
21	0x0015	DSP Solution DIGISTD
22	0x0016	DSP Solution DIGIFIX
23	0x0017	Dialogic OKI ADPCM
24	0x0018	MediaVision ADPCM
25	0x0019	HP CU
32	0x0020	Yamaha ADPCM
33	0x0021	Speech Compression Sonarc
34	0x0022	DSP Group True Speech
35	0x0023	Echo Speech EchoSC1
36	0x0024	Audiofile AF36
37	0x0025	APTX
38	0x0026	AudioFile AF10
39	0x0027	Prosody 1612
40	0x0028	LRC
48	0x0030	Dolby AC2
49	0x0031	Microsoft GSM610
50	0x0032	Microsoft MSNAudio
51	0x0033	Antex ADPCME
52	0x0034	Control Res VQLPC
53	0x0035	Digireal
54	0x0036	DigiADPCM AC2
55	0x0037	Control Res CR10
56	0x0038	NMS VBXADPCM AC2
57	0x0039	Roland RDAC
58	0x003A	EchoSC3
59	0x003B	Rockwell ADPCM
60	0x003C	Rockwell Digit LK
61	0x003D	Xebec
64	0x0040	Antex Electronics G.721
65	0x0041	Antex Electronics G.728 CELP
66	0x0042	Microsoft MSG723
80	0x0050	MPEG
82	0x0052	Voxware RT24
83	0x0053	InSoft PAC
85	0x0055	MPEG Layer 3
89	0x0059	Lucent G.723
96	0x0060	Cirrus
97	0x0061	ESPCM
98	0x0062	Voxware
99	0x0063	Canopus Atrac
100	0x0064	APICOM G.726 ADPCM
101	0x0065	APICOM G.722 ADPCM
102	0x0066	Microsoft DSAT
103	0x0067	Microsoft DSAT Display
105	0x0069	Voxware Byte Aligned
112	0x0070	Voxware AC8
113	0x0071	Voxware AC10
114	0x0072	Voxware AC16
115	0x0073	Voxware AC20
116	0x0074	Voxware Metavoice
117	0x0075	Voxware Metasound
118	0x0076	Voxware RT29HW
119	0x0077	Voxware VR12
120	0x0078	Voxware VR18
121	0x0079	Voxware TQ40
128	0x0080	Softsound
129	0x0081	Voxware TQ60
130	0x0082	MSRT24
131	0x0083	AT&T G.729A
132	0x0084	Motion Pixels MVI MV12
133	0x0085	DF G.726
134	0x0086	DF GSM610
136	0x0088	ISIAudio
137	0x0089	Onlive
145	0x0091	Siemens SBC24
146	0x0092	Dolby AC3 SPDIF
151	0x0097	ZyXEL ADPCM
152	0x0098	Philips LPCBB
153	0x0099	Packed
256	0x0100	Rhetorex ADPCM
257	0x0101	BeCubed IRAT
273	0x0111	Vivo G.723
274	0x0112	Vivo Siren
291	0x0123	DEC G.723
512	0x0200	Creative ADPCM
514	0x0202	Creative FastSpeech8
515	0x0203	Creative FastSpeech10
544	0x0220	Quarterdeck
768	0x0300	Fujitsu FM Towns Snd
1024	0x0400	BTV Digital
1664	0x0680	AT&T VME VMPCM
4096	0x1000	Olivetti OLIGSM
4097	0x1001	Olivetti OLIADPCM
4098	0x1002	Olivetti OLICELP
4099	0x1003	Olivetti OLISBC
4100	0x1004	Olivetti OLIOPR
4352	0x1100	LH Codec
5120	0x1400	Norris
5121	0x1401	AT&T ISIAudio
5376	0x1500	AT&T Soundspace Music Compression
8192	0x2000	DVM
65534	0xFFFE	WAVE_FORMAT_EXTENSIBLE
65535	0xFFFF	Experimental