[Speex-dev] Re: problems decoding speex... please help
Mo Win
mowin.dev at gmail.com
Tue Dec 6 07:01:23 PST 2005
Correction: speex_encoder_destroy(state);
should be: speex_decoder_destroy(state);
in my message below.
Mon
On 12/6/05, Mo Win <mowin.dev at gmail.com> wrote:
>
> Hi all. I'm trying to decode speex using version 1.1.10's libspeex with
> fixed_point enabled. copied the sample in the manual (1.1.11) with minor
> revisions. While running the program, encountered this warning:
>
> "Packet is larger than allocated buffer : 38"
>
> when calling speex_bits_read_from (&bits, cbits, nBytes)
>
> then my program terminated unexpectedly with errors (Unhandled exception
> at 0x10225e1f ( msvcr80d.dll) in sampleDEC.exe: 0xC0000005: Access
> violation reading location 0x645c3a63.)
>
> I declared cbits as char *cbits [500]. nBytes is 38, bit rate is 15000
> bps. I'm decoding a 'speex' file created using a program much like
> sampleENC. Can anyone tell me what is wrong and how I can correct the
> problem? Thank you. For your reference I'm attaching the code. Please feel
> free to ask me questions if the information I provided is lacking. By the
> way, I am compiling for Windows using VS2005 Beta2.
>
> Thanks,
> Mon
>
> #define FIXED_POINT
>
> int main (int argc, char ** argv)
> {
> printf ("sampleDEC.exe started!\n"); /**/
>
> int nBytes, FrameSize, BitRate;
> FILE *fin, *fout;
> char *inFile, *outFile, *PEnhancement;
> short out [500];
> char cbits [500];
> void *state;
> SpeexBits bits;
>
> state = speex_decoder_init (&speex_nb_mode);
> speex_decoder_ctl (state, SPEEX_GET_FRAME_SIZE, &FrameSize);
>
> inFile = argv [1];
> outFile = argv [2];
> PEnhancement = argv [3];
>
> fout = fopen (outFile, "w");
> if (fout == NULL)
> {
> printf ("Error creating file\n");
> return 1;
> }
> printf ("Successfully opened %s for writing! \n", outFile); /**/
>
> fin = fopen (inFile, "rb");
> if (fin == NULL)
> {
> printf ("Error opening file\n");
> return 1;
> }
> printf ("Successfully opened %s for decoding!\n\n", inFile); /**/
>
> fseek (fin,(sizeof(char))*12+sizeof(int),SEEK_SET); // because of the
> way I encoded a PCM file
>
> speex_decoder_ctl (state, SPEEX_GET_BITRATE, &BitRate);
> printf ("decoding... BIT RATE: %i\n",BitRate);
>
> switch (*PEnhancement)
> { // Here I use BitRate to toggle Perceptual Enhancement
> case 'Y':
> BitRate = 1;
> break;
> case 'y':
> BitRate = 1;
> break;
> case 'N':
> BitRate = 0;
> break;
> case 'n':
> BitRate = 0;
> break;
> default:
> BitRate = 1;
> break;
> }
> speex_decoder_ctl (state, SPEEX_SET_ENH, &BitRate);
>
> BitRate = 0; // Henceforth BitRate is used to count the number of
> frames decoded
>
> while (1)
> {
> fread(&nBytes, sizeof(int), 1, fin);
>
> if (feof(fin))
> break;
>
> fread(cbits, sizeof(char), nBytes, fin);
>
> speex_bits_read_from(&bits, cbits, nBytes);
>
> speex_decode_int(state, &bits, out);
>
> fwrite(out, sizeof(short), FrameSize, fout);
> BitRate++;
> }
>
> printf ("nBytes is %i.\n",nBytes);
> printf ("Decoded %i frames\n",BitRate);
>
> speex_encoder_destroy(state);
> speex_bits_destroy(&bits);
>
> fclose (fin);
> fclose(fout);
>
> return 0;
> }
>
>
>
>
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