Hello!
I write a program that capture the sound and when the buffor of sound card
is full send this by UDP to server. Then server will be calculate the FFT on
this. So I need the samples. So my record_buffor function in capture
program:
static void record_buffor(const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t offset,int count, double *_phase)
[...]
unsigned char *samples[channels];
[...]
f_write = write(f_open, *(samples), PERIOD_SIZE); // save
to the local disk
LiczbaBajtow=sendto( Deskryptor, *(samples), PERIOD_SIZE, 0,
(struct sockaddr *)&AdresSerwera, sizeof(AdresSerwera)); //send to server
while (PERIOD_SIZE-- >0) {
samples[chn] += steps[chn];
}
I also try to save the file to local disk in this way:
unsigned char *tmp;
size = 2;
while (PERIOD_SIZE-- >0) {
tmp[byte] = *(samples[chn] + byte);
f_write = write(f_open, tmp, size);
}
But I have value something like this
............^.^.^............^.^.^.^.^.......
If I use fprintf (f_open, "%u",tmp[byte])
I have only "0.0.0.0.0.0."
So I need the key how open convert this *(samples) to anything that I can
work with it. Could You help me?
Best wishes
Mark
Pozdrawiam
Marek Michalak
2009/8/31 Bill Unruh <un...@physics.ubc.ca>
> On Mon, 31 Aug 2009, Marek Michalak wrote:
>
> Hello!
>>
>> I change the pcm.c program from alsa-lib/test, and capture the sound by
>> asynchronic function with mmap. But when I edit recorded file I've got
>> only
>> dots like: ..................
>>
> Sound files are not text files. What are you using to try to edit the file?
>
> When I open the file in aplay I have capture sound. How converts this
>> 'dots'
>> to normal value that I can use in my program?
>>
>
> What program?
>
>
>>
>> Best wishes
>> Marek Michalak
>>
>>
>
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