c - SDL Callback is repeating non stop? -


we have called our callback function in sdl audio following setup.

struct { sdl_audiospec spec; /* sdl audio spec structure */ uint8 *sound; /* pointer wave data */ uint32 soundlen; /* length of wave data */ int soundpos; /* current play position */ } wave;  void fillerup(void *unused, uint8 *stream, int len) { uint8 *waveptr; int waveleft=0; printf("in fillerup:%d",wave.soundlen); waveptr = wave.sound + wave.soundpos; waveleft = wave.soundlen - wave.soundpos;     while ( waveleft <= len ) {     /* process samples */     uint8 *process_buf = (uint8 *)malloc(waveleft * sizeof(uint8));     if(process_buf == 0) {         // here     }     sdl_memcpy(process_buf, waveptr, waveleft);     /* processing here, e.g. */     /* processing audio samples in process_buf[*] */     // play processed audio samples     sdl_memcpy(stream, process_buf, waveleft);     stream += waveleft;     len -= waveleft;     // ready repeat play audio     waveptr = wave.sound;     waveleft = wave.soundlen;     wave.soundpos = 0;     free(process_buf);       }  uint8 process_buf[len]; sdl_memcpy(process_buf, waveptr, len); sdl_memcpy(stream, process_buf, len); wave.soundpos += len; }

it keep printing in fillerup:8343 size represent in kb or mb ? secondly not want keep repeating , need take sample , mix other clips. in main have codes.

if ( sdl_loadwav("file1.wav",&wave.spec, &wave.sound, &wave.soundlen) == null ) {         fprintf(stderr, "couldn't load %s: %s\n", "file1.wav", sdl_geterror());        //quit(1);     }     // set callback function     wave.spec.callback = fillerup; if ( sdl_openaudio(&wave.spec, null) < 0 ) {                 fprintf(stderr, "couldn't open audio: %s\n", sdl_geterror());                 sdl_freewav(wave.sound);                 //quit(2);      }*/      // start playing      sdl_pauseaudio(0);


Comments

Post a Comment

Popular posts from this blog

c++ - CryptStringToBinary API behavior -

i seeing strange behavior cryptstringtobinary cryptography api. please see below code (config: x64 debug): #include "stdafx.h" #include <windows.h> #include <strsafe.h> #include <iostream> #include <exception> void main() { dword dwskip; dword dwflags; dword dwdatalen; //lpcwstr pszinput = l"jaaaaaecaaadzgaaakqaagdnnl1l56bwgfjdgr3rpxtqqqn6daw3usv2emkjym4t"; //this works fine lpcwstr pszinput = l"mytest"; //doesnt work, api returns false,error code 0x0000000d // determine size of byte array , allocate memory. if(! cryptstringtobinary( pszinput, _tcslen( pszinput ) + 1, crypt_string_base64, null, &dwdatalen, &dwskip, &dwflags ) ) { dword dw = getlasterror(); //0x0000000d: data invalid throw std::exception( "error computing byte length." ); } byte *pbytebyte = null; try { ...
Read more

c++ - Correct method for redrawing a layered window -

i have window created ws_ex_layered window style. drawing onto memory bitmap using gdi+, , using updatelayeredwindow update graphical content of layered window. intend use window main window of application, require redraw frequently. seeing layered windows not receive wm_paint windows message [?] , need come appropriate method re-drawing window. optimisation not essential , it's nice have cake , eat too. therefore, in search of "correct" method use. here thoughts far: i guess it's idea render onto off-screen bitmap before bitblt ing or similar. 60 frames rendered per second should (more than?) enough (but how compare other applications' frame rates?). possible solutions: use settimer send wm_timer message on regular basis. useful because through specifying time-out value, can achieve desired frames per second, without requirement measure duration "frame" takes rendered. would cause input or other lags due frequency , speed of m...
Read more

java.util.scanner - How to read and add only numbers to array from a text file -

i'm learning java , have question regarding reading file want read numbers file contains strings well. here example of file: 66.56 "3 java 3-43 5-42 2.1 1 and here coding: public class test { public static void main (string [] args){ if (0 < args.length) { file x = new file(args[0]); try{ scanner in = new scanner( new fileinputstream(x)); arraylist<double> test = new arraylist<>(); while(in.hasnext()){ if(in.hasnextdouble()){ double f=in.nextdouble(); test.add(f);} else {in.next();} } catch(ioexception e) { system.err.println("exception during reading: " + e); } } my problem add 66.56,2.1 , 1 doesn't add 3 after "3 or ignores 3-43 , 5-42 can tell me how skip strings , add doubles here? thanks all said 3 ie; "3, 3-43 , 4-42 strings either u read string , split , check number @ " , - or put in space between characters , integers. jvm after compilation tre...
Read more