WinAPI: waveOutGetDevCaps - 查詢輸出設(shè)備的性能//聲明: waveOutGetDevCaps(uDeviceID: UINT; {輸出設(shè)備ID}lpCaps: PWaveOutCaps; {TWaveOutCaps 結(jié)構(gòu)的指針, 用于接受設(shè)備信息}uSize: UINT): MMRESULT; {TWaveOutCaps 結(jié)構(gòu)大小} ): MMRESULT; {成功返回 0; 可能的錯誤值見下:}MMSYSERR_BADDEVICEID = 2; {設(shè)備ID超界} MMSYSERR_NODRIVER = 6; {沒有安裝驅(qū)動程序}//TWaveOutCaps 是 tagWAVEOUTCAPSA 結(jié)構(gòu)的重定義: tagWAVEOUTCAPSA = recordwMid: Word; {制造商ID}wPid: Word; {產(chǎn)品ID}vDriverVersion: MMVERSION; {版本號; 高字節(jié)是主版本號, 低字節(jié)是次版本號}szPname: array[0..MAXPNAMELEN-1] of AnsiChar; {產(chǎn)品名稱}dwFormats: DWORD; {支持的格式}wChannels: Word; {單聲道(1)還是立體聲(2)}dwSupport: DWORD; {其他功能} end;//dwFormats: WAVE_INVALIDFORMAT = $00000000; {invalid format} WAVE_FORMAT_1M08 = $00000001; {11.025 kHz, Mono, 8-bit } WAVE_FORMAT_1S08 = $00000002; {11.025 kHz, Stereo, 8-bit } WAVE_FORMAT_1M16 = $00000004; {11.025 kHz, Mono, 16-bit} WAVE_FORMAT_1S16 = $00000008; {11.025 kHz, Stereo, 16-bit} WAVE_FORMAT_2M08 = $00000010; {22.05 kHz, Mono, 8-bit } WAVE_FORMAT_2S08 = $00000020; {22.05 kHz, Stereo, 8-bit } WAVE_FORMAT_2M16 = $00000040; {22.05 kHz, Mono, 16-bit} WAVE_FORMAT_2S16 = $00000080; {22.05 kHz, Stereo, 16-bit} WAVE_FORMAT_4M08 = $00000100; {44.1 kHz, Mono, 8-bit } WAVE_FORMAT_4S08 = $00000200; {44.1 kHz, Stereo, 8-bit } WAVE_FORMAT_4M16 = $00000400; {44.1 kHz, Mono, 16-bit} WAVE_FORMAT_4S16 = $00000800; {44.1 kHz, Stereo, 16-bit}//dwSupport: WAVECAPS_PITCH = $0001; {支持音調(diào)控制} WAVECAPS_PLAYBACKRATE = $0002; {支持播放速度控制} WAVECAPS_VOLUME = $0004; {支持音量控制} WAVECAPS_LRVOLUME = $0008; {支持左右聲道音量控制} WAVECAPS_SYNC = $0010; {} WAVECAPS_SAMPLEACCURATE = $0020; {} WAVECAPS_DIRECTSOUND = $0040; {} //舉例: http://www.cnblogs.com/del/archive/2008/02/20/1075508.html

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