[speex-dev] Please 30 second to look a my code

[Jean-Marc Valin]

Well, you seem to be using FRAME_SIZE but only defining frame_size.
Otherwise, the code looks OK, but it's always hard to tell. I suggest
you start from speexenc/speexdec or from the example I wrote in the
manual at: http://www.speex.org/manual/node12.html

        Jean-Marc

Le ven 19/12/2003 à 05:22, Fabio a écrit :
> Hi 
> i'm developing a sort of VoIP application 
> for my ipaq using speex...
> I'm still at beginning and i have many problems encoding and decoding
> my 
> wav files....output is only  noise! Why?
>  
> I'm using 
> Libspeex 1.1.3, 
> Embedded VisualC++ 3.0,
> Ipaq 3850(206 MHz Intel® Strong ARM 32-bit RISC Processor) PocketPC
> 2002 (Windows CE 3.0).
>  
> Libspeex is complied with the definition of FIXED_POINT...
>  
> Regards
> Fabio
>  
> P.S.
> Rodrigo did u do something similar?
>  
> This is the code, what could be wrong?
> void CRegistratoreDlg::OnEncode() 
> {
>  Sleep(500); //Wait because drawing send window 
>  
>  SpeexBits bits; 
>  
>  void *state; 
>  
>  short InBuffer[FRAME_SIZE]; 
>  char OutBuffer[200]; 
>  char waveheader[WAVEHEADER]; 
>  
>  HANDLE WaveFile; 
>  HANDLE SpeexFile; 
>  
>  DWORD NrOfBytesRead, NrOfBytesWritten; 
>  
>  char nrBytes = 0; 
>  int nbBytes = 0; 
>  int bit_rate, frame_size, test=0; 
>  bool first=true; 
>  
>  WaveFile = CreateFile(_T("\\Temp\\tempsound.wav"), GENERIC_READ, 0,
> NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); 
>  SpeexFile = CreateFile(_T("\\Temp\\tempsound.spx"), GENERIC_WRITE, 0,
> NULL,CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); 
>  
>  speex_bits_init(&bits); //init encoded bits buffer 
>  state = speex_encoder_init(&speex_nb_mode); //Init encoder in
> narrowband mode 
>  speex_encoder_ctl(state, SPEEX_GET_FRAME_SIZE, &frame_size);//Get
> frame size 
>  
>  int tmp=0;
>  speex_encoder_ctl(state, SPEEX_SET_VBR, &tmp);
>  tmp=1;
>  speex_encoder_ctl(state, SPEEX_SET_COMPLEXITY, &tmp);
>  
>  bit_rate=24000; 
>  speex_encoder_ctl(state, SPEEX_SET_BITRATE, &bit_rate); 
>  ReadFile(WaveFile, waveheader, WAVEHEADER, &NrOfBytesRead, NULL); 
>  WriteFile(SpeexFile, waveheader, WAVEHEADER, &NrOfBytesWritten,
> NULL); //Raw copy of waveheader from speexfile to wavefile 
>  
>  while(true)
>  { 
>       ReadFile(WaveFile, InBuffer, FRAME_SIZE, &NrOfBytesRead, NULL);
> //Fabio: Somewhere i found FRAME_SIZE * 2
>  
>       speex_bits_reset(&bits); //Reset out bits buffer 
>       speex_encode(state, InBuffer, &bits); //Encode bits 
>  
>       nbBytes = speex_bits_write(&bits, OutBuffer, 200); //Save
> encoded bits to buffer 
>  
>       if(first){ //First frame save the first byte, nrBytes, to
> outfile 
>            nrBytes = nbBytes; 
>            WriteFile(SpeexFile, &nrBytes, 1, &NrOfBytesWritten, NULL);
>            first=false; 
>       } 
>  
>       WriteFile(SpeexFile, &OutBuffer, nbBytes, &NrOfBytesWritten,
> NULL); //Write encoded buffer to outfile 
>  
>       if(NrOfBytesRead<FRAME_SIZE) //Break if end of file 
>            break; 
>  } 
>  
>  speex_bits_destroy(&bits); //Deallocate 
>  speex_encoder_destroy(state); 
>  
>  CloseHandle(WaveFile); 
>  CloseHandle(SpeexFile);
>  
>  MessageBox(_T("Encoding Done")); 
> }  
>  
>  
> void CRegistratoreDlg::OnDecode() 
> {
>  
>  SpeexBits bits; 
>  
>  void *state; 
>  
>  char InBuffer[200]; 
>  short OutBuffer[FRAME_SIZE]; 
>  char waveheader[50]; 
>  
>  HANDLE InFile; 
>  HANDLE OutFile; 
>  
>  char nrBytes = 0; 
>  int nbBytes = 0; 
>  
>  DWORD NrOfBytesRead; 
>  DWORD NrOfBytesWritten; 
>  
>  InFile = CreateFile(_T("\\Temp\\tempsound.spx"), GENERIC_READ, 0,
> NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); 
>  
>  //Create file to decode 
>  OutFile = CreateFile(_T("\\Temp\\Dai.wav"), GENERIC_WRITE, 0, NULL,
> CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); // Create out wave file 
>  
>  state = speex_decoder_init(&speex_nb_mode); //Init decoder in
> //narrowband mode 
>  
>  int tmp=0; 
>  speex_decoder_ctl(state, SPEEX_SET_ENH, &tmp); 
>  
>  speex_bits_init(&bits); //Init out bit buffer 
>  
>  ReadFile(InFile, waveheader, WAVEHEADER, &NrOfBytesRead, NULL); //Raw
> copy of wave header 
>  
>  WriteFile(OutFile, &waveheader, WAVEHEADER, &NrOfBytesWritten, NULL);
> //from wave file to speexfile 
>  
>  ReadFile(InFile, &nrBytes, 1, &NrOfBytesRead, NULL); //Read first
> byte in frame to "nrBytes" 
>  
>  nbBytes=nrBytes; //"nrBytes" gives info about used code rate 
>  
>  while(1){ //Decode until end of file  
>       ReadFile(InFile, InBuffer, nbBytes, &NrOfBytesRead, NULL);
> //Read bits to decode 
>   
>       speex_bits_read_from(&bits, InBuffer, nbBytes); 
>  
>       speex_decode(state, &bits, OutBuffer); //Decode bits 
>  
>       WriteFile(OutFile, OutBuffer, FRAME_SIZE*2, &NrOfBytesWritten,
> NULL); 
>   
>       if(NrOfBytesRead<nbBytes) //Break if end of file 
>            break; 
>  } 
>  
>  speex_bits_destroy(&bits); //Deallocate 
>  speex_decoder_destroy(state); 
>  
>  CloseHandle(InFile); 
>  CloseHandle(OutFile); 
>  
>  MessageBox(_T("Decoding Done"));  
> }

-- 
Jean-Marc Valin, M.Sc.A., ing. jr.
LABORIUS (http://www.gel.usherb.ca/laborius)
Université de Sherbrooke, Québec, Canada


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