Speex dev - Jan 2010 - Trouble in decoding speex on PC

Hi,

I am trying to develop a command line utility on PC side which will decode the
encoded speex file without any header - ie. raw speex encoded data.

I downloaded the speex-1.2rc1 version and used the testenc.c under libspeex
library. Just to make sure that things are working fine, encoded a .raw audio
file and could get the .bit and decoded audio raw file which was validated by
using a raw to wav converter and playing on PC.

I modified the same code to make an independent decode utility and facing the
following issue.. I could find that each time 160 samples are encoded, there are
26 bytes of encoded speex data, hence read 26 bytes of encoded data from file
and processed as shown below.. But it gives error like - Invalid mode and stream
got corrupted...What could be the reason? Also how do I calculate the number of
speex bytes to be decoded at a given time.. Any help will be appreciated..

while (!feof(fin))
?? {
??? ? fread(tempd, 1, 26, fin);

????? if (feof(fin))
???????? break;
????? speex_bits_reset(&bits);

??? ?speex_bits_read_from(&bits, tempd, 26);??? ?

????? speex_bits_rewind(&bits);

????? speex_decode_int(dec, &bits, out_short);

fwrite(&out_short[skip_group_delay], sizeof(short),
FRAME_SIZE-skip_group_delay, fout);
????? skip_group_delay = 0;





Regards,
Kumar




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Have you tried starting from sampleenc.c/sampledec.c (see manual)?

	Jean-Marc

On 2010-01-28 05:45, Kumar Vply wrote:
> Hi,
>
> I am trying to develop a command line utility on PC side which will
> decode the encoded speex file without any header - ie. raw speex encoded
> data.
>
> I downloaded the speex-1.2rc1 version and used the testenc.c under
> libspeex library. Just to make sure that things are working fine,
> encoded a .raw audio file and could get the .bit and decoded audio raw
> file which was validated by using a raw to wav converter and playing on PC.
>
> I modified the same code to make an independent decode utility and
> facing the following issue.. I could find that each time 160 samples are
> encoded, there are 26 bytes of encoded speex data, hence read 26 bytes
> of encoded data from file and processed as shown below.. But it gives
> error like - Invalid mode and stream got corrupted...What could be the
> reason? Also how do I calculate the number of speex bytes to be decoded
> at a given time.. Any help will be appreciated..
>
> while (!feof(fin))
> {
> fread(tempd, 1, 26, fin);
>
> if (feof(fin))
> break;
> speex_bits_reset(&bits);
>
> speex_bits_read_from(&bits, tempd, 26);
>
> speex_bits_rewind(&bits);
>
> speex_decode_int(dec, &bits, out_short);
>
> fwrite(&out_short[skip_group_delay], sizeof(short),
> FRAME_SIZE-skip_group_delay, fout);
> skip_group_delay = 0;
>
>
>
>
>
> Regards,
> Kumar
>
>
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