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Hi everyone,

I tried to read data into a recording buffer but it didn’t work.
the recording is OKAY also playing the sound is good too.
But i will like to read the data before it’s playing.
i use the functions readData(), lock() and unlock but nothing happened!
Can somebody HELP me to solve this problem.
Here are the codes…
PS. I can’t find any examples in the dir. about readData.

class sound_mgr
{
private:
FMOD::System *sys;
FMOD::Sound *sound;
FMOD::Channel *channel;
FMOD_RESULT result;
FMOD::ChannelGroup *ch;
FMOD_CREATESOUNDEXINFO exinfo;
public:
sound_mgr();
virtual ~sound_mgr();
void record_sound();
void play_sound();
};
sound_mgr::sound_mgr()
{
result = FMOD::System_Create(&sys);
ERRCHECK(result,2);
result = sys->setDriver(0);
ERRCHECK(result,3);
result = sys->setRecordDriver(0);
ERRCHECK(result,4);
result = sys->setSoftwareChannels(100);
ERRCHECK(result,5);
result = sys->setOutput(FMOD_OUTPUTTYPE_DSOUND);
ERRCHECK(result,6);
result = sys->setHardwareChannels(32,64,32,64);
ERRCHECK(result,7);
result = sys->init(32, FMOD_INIT_NORMAL, NULL);
ERRCHECK(result,8);

char name[256];
result = sys->getDriverName(0,name,256);
memset(&exinfo,0,sizeof(FMOD_CREATESOUNDEXINFO));
exinfo.cbsize           = sizeof(FMOD_CREATESOUNDEXINFO);
exinfo.numchannels      = 1;
exinfo.format           = FMOD_SOUND_FORMAT_PCM16;
exinfo.defaultfrequency = 44100;
exinfo.length           = exinfo.defaultfrequency * sizeof(short) * exinfo.numchannels * 5;
result = sys->createSound(0, FMOD_2D | FMOD_HARDWARE | FMOD_OPENUSER, &exinfo, &sound);

}
sound_mgr::~sound_mgr()
{
result = sys->release();
ERRCHECK(result,9);
result = sound->release();
ERRCHECK(result,10);
}

void sound_mgr::record_sound()
{
void *ptr1, *ptr2;
unsigned int lenbytes, len1, len2,read;
float buf[4096];
result = sys->recordStart(sound,false);
ERRCHECK(result,11);
sound->getLength (&lenbytes, FMOD_TIMEUNIT_PCMBYTES);
ERRCHECK(result,12);
sound->lock(0, lenbytes, &ptr1, &ptr2, &len1, &len2);

result = sound->readData(buf, 4096,&read);
for(int i=0; i<50; i++)
{
    printf("%i\n",buf[i]);
}
sound->unlock(ptr1, ptr2, len1, len2);

}
void sound_mgr::play_sound()
{
sys->playSound(FMOD_CHANNEL_FREE,sound,false,&channel);
ERRCHECK(result,12);
}

here the results of the buffer:
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648
-2147483648

and here the results of the lock() function:
ptr1:14714888
len1:441000
ptr2:0
len2:0

as you can see the buffer isn’t lock at the end…Can you give me some examples or tell me where to find them?

thank U

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Hi.
For a start forget readData function. It is for decoding from files, not record samples. Use lock and unlock only.

There is already an example that does this, in both recording examples.

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Hi brett,

Thank you for your reaction. At this moment i get some data but they are not good. i thing some thing is wrong. Can you look at this result for me please? and tell me how to get the good data from the ptr1.

….
exinfo.cbsize = sizeof(FMOD_CREATESOUNDEXINFO);
exinfo.numchannels = 1;
exinfo.format = FMOD_SOUND_FORMAT_PCM16;
exinfo.defaultfrequency = 44100;
exinfo.length = exinfo.defaultfrequency * sizeof(short) * exinfo.numchannels * 2;
…….

sound->lock(lastrecordpos * exinfo.numchannels * 2, blocklength * exinfo.numchannels * 2, &ptr1, &ptr2, &len1, &len2);
/*
Write it to disk.
/
if (ptr1 && len1)
{
unsigned char *p=(unsigned char
)ptr1;
for(int i=0;i<len1;i++)
{
fprintf(f,"%i ",*p);
p++;
}
}
…..
here is the result of ptr1:

128 128 127 128 127 128 127 128 127 128 127 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 132 132 131 132 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 132 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 131 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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can you tell what am i doing wrong and how to solve this problem?

Thank U!

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what problem? That could be sound data for all i know. What do you expect it to be?

If you’re confused about bytes, it should be signed short or whatever format the sound was created in.

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