Re: [LAU] How to decode raw ADPCM data?

On Wed, Mar 12, 2008 at 5:43 AM, Jozef Henzl <popcorp86@email-addr-hidden> wrote:
> Hello,
> Does anyone know which tool or library i can use to decode audio data stored
> in a ADPCM header-less file? (8kHz, 1 channel, (12,16,25 or 32) bit)
> I've tried sox and libsamplerate, but both throws an error.

> and with sndfile:
> <code snip>
> sfinfo.format = SF_FORMAT_IMA_ADPCM | SF_FORMAT_RAW;
> sfinfo.samplerate = 8000;
> sfinfo.channels = 1;
> if ((fpr = sf_open ("data.adpcm", SFM_READ, &sfinfo)) == NULL)
> ...
> </code snip>
>

Try one of the following sndfile formats with the RAW (from sndfile.h)

   SF_FORMAT_GSM610 = 0x0020, /* GSM 6.10
encoding. */
   SF_FORMAT_VOX_ADPCM = 0x0021, /* OKI /
Dialogix ADPCM */

   SF_FORMAT_G721_32 = 0x0030, /* 32kbs
G721 ADPCM encoding. */
   SF_FORMAT_G723_24 = 0x0031, /* 24kbs
G723 ADPCM encoding. */
   SF_FORMAT_G723_40 = 0x0032, /* 40kbs
G723 ADPCM encoding. */

jlc
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Received on Wed Mar 12 16:15:01 2008