| Forum List • Thread List • Refresh • New Topic • Search • Previous • Next  1  |  1. upgrade problem#3042 Posted by: 2003-12-02 21:23:34 | In order to solve the problem i posted about last week, i am now trying to upgrade 229 to 242. So far i am not really happy with the compatibility. :(
One of the problems i cannot solve myself. Much of the program i have not written myself, this part is about multithreading, i have read the info on wxwindows.org, but i simply dont get it. :(
I get the following error at the arrow:
"error C2512: 'wxCondition' : no appropriate default constructor available"
i have no idea how to solve this. Thanx for helping.
cReadThread::cReadThread(int FileNr, const wxString& FullPath)
:wxThread(wxTHREAD_JOINABLE)
{ <-----------ERROR
wxASSERT((FileNr >= 0) && (FileNr <= MaxNrOfFiles));
wxLogDebug("cReadThread %d cReadThread(%s)", FileNr, FullPath);
//save the file number and the fullpath
m_FileNr = FileNr;
m_FullPath = FullPath;
//open the audio file with libsndfile
m_SndFile = NULL;
m_SndFile = sf_open_read(m_FullPath, &m_SndFileInfo);
if(m_SndFile == NULL)
{
wxString Temp;
Temp.Printf("The audio file "%s" could not be opened."
"Check if the file is a valid audio file.",
FullPath);
throw cReadThreadException(Temp);
}
//check if the file format is supported
CheckFormat();
//set all member variables to their initial value
m_FilePositionFrames = 0;
m_StopReading = false;
m_IsReading = false;
m_LastIndex = 0;
//m_AudioInfo.LogDebug();
}
class cReadThread : public wxThread
{
public:
cReadThread(int FileNr, const wxString& FullPath) throw(cReadThreadException);
~cReadThread();
virtual void *Entry(); //thread execution starts here
void StartReading(int StartFilePositionFrames);
void StopReading();
bool IsReading();
wxString GetFilePath();
void GetAudioInfo(cAudioInfo& AudioInfo);
float GetFileDurationSec();
wxString AudioFormatToString();
wxCondition m_ConditionStartRead; //needs to be public so AudioIO can access it
private:
void FillBlocks();
void CheckFormat() throw(cReadThreadException);
int m_FileNr; //the number of the audiofile. is used for finding the right buffer blocks
wxString m_FullPath; //the audiofile to read data from.
SNDFILE *m_SndFile; //pointer to audiofile, needed for libsndfile.
SF_INFO m_SndFileInfo; //structure with info about the opened audiofile.
cAudioInfo m_AudioInfo;
long m_FilePositionFrames; //the current read position in the file, in frames.
int m_LastIndex; //the index of the last buffer block that was filled.
bool m_StopReading;
bool m_IsReading;
}; | 2. Re: upgrade problem #3045 Posted by: upCASE 2003-12-03 05:34:08 | Hi!
The problem really is in your header at this line
wxCondition m_ConditionStartRead;
Check the API for wxCondition.wxCondition::wxCondition
wxCondition(wxMutex& mutex)
Default and only constructor. The mutex must be locked by the caller before calling Wait function.
Use IsOk to check if the object was successfully intiialized. Since there is no wxCondition::wxCondition() you'll have to use a mutex. Have a look at the example given for wxCondition and either change your code or comment out that line.
upcaseupCASE
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If it was hard to write, it should be hard to read!- Do. Or do not. There is no try! | | Forum List • Thread List • Refresh • New Topic • Search • Previous • Next 1 |
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