c 呼叫開源espeak語音引擎實現中英文混讀

實際.net專案中需要用到tts（文字轉語音技術），實現語音播服務，需要中英文混讀

1，微軟tts語音引擎。

呼叫非常簡單 ,也是我首先採用的方案，可參考如下微博:

但有個缺點：依賴windows平台的語音引擎與speech api，使用過程中會發現：有的系統能用，有的系統用不了（據說是閹割版系統所致）；非中文版系統更慘，需要各種操作安裝中文語音包，最後安裝好了，可能發現還是用不了（專案中血淋淋的教訓：windows server英文版系統，各種折騰最後用不了，甲方伺服器，又不能隨便重灌系統），於是替代方案。

2，espeak方案

[

dllimport
("espeak_lib.dll"
, charset = charset.auto, callingconvention = callingconvention.cdecl)
]static extern error espeak_setvoicebyname([
marshalas
(unmanagedtype.lputf8str)
] string name);[
dllimport
("espeak_lib.dll"
, charset = charset.auto, callingconvention = callingconvention.cdecl)
]static extern error espeak_setparameter
(parameter parameter, int value, parametertype type);[
dllimport
("espeak_lib.dll"
, charset = charset.auto, callingconvention = callingconvention.cdecl)
]static extern error espeak_synchronize()
;[dllimport
("espeak_lib.dll"
, charset = charset.auto, callingconvention = callingconvention.cdecl)
]static extern error espeak_terminate()
;[dllimport
("espeak_lib.dll"
, charset = charset.auto, callingconvention = callingconvention.cdecl)
]static extern intptr espeak_getcurrentvoice()
;[dllimport
("espeak_lib.dll"
, charset = charset.auto, callingconvention = callingconvention.cdecl)
]static extern error espeak_synth([
marshalas
(unmanagedtype.lputf8str)
] string text, int size, uint startposition =
0, positiontype positiontype = positiontype.character, uint endposition =
0, speechflags flags = speechflags.charsutf8, uintptr uniqueidentifier =
default
(uintptr)
, intptr userdata =
default
(intptr));
[dllimport
("espeak_lib.dll"
, charset = charset.auto, callingconvention = callingconvention.cdecl)
]static extern int espeak_initialize
(audiooutput output, int bufferlength, intptr path, int options);[
dllimport
("espeak_lib.dll"
, charset = charset.auto, callingconvention = callingconvention.cdecl)
]static extern error espeak_cancel()
;[dllimport
("espeak_lib.dll"
, charset = charset.auto, callingconvention = callingconvention.cdecl)
]static extern void
espeak_setsynthcallback
(eventhandler.synthcallback callback)
;

public

static
void
initialize
(string path)
?", path));
}espeak_setsynthcallback
(eventhandler.handle)
;            initialized =
true;}
public
static bool setrate
(int rate)
var result =
espeak_setparameter
(parameter.rate, rate, parametertype.absolute)
;return
checkresult
(result);}
static bool checkresult
(error result)
else
if(result == error.
ee_buffer_full
)else
if(result == error.
ee_internal_error
)else
}public
static bool speak
(string text)
public
static bool speakssml
(string text)
public
static bool stop()
public
static bool espeak_synchronize()
public
static bool espeak_terminate()
public
static bool setvoicebyname
(string name)
public
static voice getcurrentvoice()
return
newvoice()
;}

class

program
}

因該模組開發主要得益於開源，故將原始碼開源：

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