hello
i am working on mp3 acm decoder driver for wince os. and the codec
provided by lame is working fine.
it call the following function when the streamConvert message. is
called ..
aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
and corresponding function implementation is
static void mp3_horse(PACMDRVSTREAMINSTANCE adsi,
const unsigned char* src, LPDWORD nsrc,
unsigned char* dst, LPDWORD ndst)
{
AcmMpeg3Data* amd = (AcmMpeg3Data*)adsi->dwDriver;
int size, ret;
DWORD dpos = 0;
ret = decodeMP3(&amd->mp, (unsigned char*)src, *nsrc, dst, *ndst,
&size);
if (ret != MP3_OK)
{
DEBUGMSG (1, (TEXT("******* we are in ret ******* \r\n")));
*ndst = *nsrc = 0;
return;
}
do {
DEBUGMSG (1, (TEXT("******* we are in do ******* \r\n")));
dpos += size;
if (*ndst - dpos < 4608) break;
ret = decodeMP3(&amd->mp, NULL, 0, dst + dpos, *ndst - dpos,
&size);
} while (ret == MP3_OK);
*ndst = dpos;
}
but when i change the convert function parameter to
aad->convert(adsi,adsh);
and the mp3_horse to
static void mp3_horse(LPACMDRVSTREAMINSTANCE adsi,LPACMDRVSTREAMHEADER
adsh)
{
AcmMpeg3Data* amd = (AcmMpeg3Data*)adsi->dwDriver;
int size, ret;
DWORD dpos = 0;
ret = decodeMP3(&amd->mp,adsh->pbSrc,adsh->cbSrcLength,adsh->pbDst,
adsh->cbDstLength, &size);
if(ret !=0) {
adsh->cbSrcLengthUsed = 0;
adsh->cbDstLengthUsed = 0;
return;
}
do {
DEBUGMSG (1, (TEXT("******* we are in do ******* \r\n")));
dpos += size;
if (adsh->cbDstLength - dpos < 4608) break;
ret = decodeMP3(&amd->mp, NULL,0, adsh->pbDst + dpos,
adsh->cbDstLength- dpos, &size);
} while (ret == 0);
adsh->cbDstLength=dpos;
adsh->cbSrcLengthUsed = adsh->cbSrcLength;
adsh->cbDstLengthUsed = adsh->cbDstLength;
}
when the driver is executed with an application it is giving error
[WARNING ("wapi_acmStreamConvert" @ 1963)] Invalid Parameter
[WARNING ("mapWaveWriteBuffer" @ 1698)] !waveOutWrite: conversion
failed!
can you please tell me where is the error lies....
regards
ashish srivastava
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