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

[Steve Kann]

Also, it looks like he's recycling the same wave header for the raw PCM 
and the speex-encoded files.  Doesn't the wave header explain the audio 
data format?  It seems that if this wave header says the data is 16bit 
PCM/8khz or whatever, and it really is speex-coded audio, a player 
wouldn't have a chance to play it correctly.

-SteveK

<p>Jean-Marc Valin wrote:

>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"));  
>>}
>>    
>>
--- >8 ----
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