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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Hi,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> I tried to encode from PCM format to OGG format
using vorbis.acm. It was working fine. Whereas when trying to convert from OGG
to PCM format, call to acmstreamconvert() returns success but the destination
buffer is always empty . I used the 0.0.3.6 version of vorbis.acm.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Here is the code I am using for conversion.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> DWORD
maxFormatSize = 0;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> mmr = acmMetrics(
NULL, ACM_METRIC_MAX_SIZE_FORMAT, &maxFormatSize );<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <font
color=green><span style='color:green'>// define input format<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> LPWAVEFORMATEX
waveFormat = (LPWAVEFORMATEX) LocalAlloc( LPTR, maxFormatSize +<font
color=blue><span style='color:blue'>sizeof</span></font>( LPWAVEFORMATEX) );<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
waveFormat->wFormatTag = WAVE_FORMAT_PCM;<font color=green><span
style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
waveFormat->nChannels =2;<font color=green><span style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
waveFormat->nSamplesPerSec = 22050;<font color=green><span style='color:
green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> waveFormat->wBitsPerSample
= 16;<font color=green><span style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
waveFormat->nBlockAlign =2*16/8; <font color=green><span style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
waveFormat->nAvgBytesPerSec = 22050*4 ;<font color=green><span
style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
waveFormat->cbSize =0;<font color=green><span style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> LPWAVEFORMATEX
oggFormat = (LPWAVEFORMATEX) LocalAlloc( LPTR, maxFormatSize );<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
oggFormat->wFormatTag =WAVE_FORMAT_VORBIS2;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
oggFormat->nChannels = 2; <font color=green><span style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
oggFormat->nSamplesPerSec = 22050; <font color=green><span style='color:
green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
oggFormat->wBitsPerSample = 16; <font color=green><span style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
oggFormat->nBlockAlign =0; <font color=green><span style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
oggFormat->nAvgBytesPerSec =4; <font color=green><span style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> oggFormat->cbSize
=32776; <font color=green><span style='color:green'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 color=green face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:green'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> g_wavstream = NULL;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> mmr = acmStreamOpen(
&g_wavstream,
<font color=green><span style='color:green'>// open an ACM conversion stream<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
driver,
<font color=green><span style='color:green'>// querying all ACM drivers<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
oggFormat, <font color=green><span style='color:green'>// converting from
MP3<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
<font color=green><span style='color:green'>/*(LPWAVEFORMATEX)*/</span></font>
waveFormat
,
<font color=green><span style='color:green'>// to WAV<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
NULL,
<font color=green><span style='color:green'>// with no filter<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
NULL,
<font color=green><span style='color:green'>// or async callbacks<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
0,
<font color=green><span style='color:green'>// (and no data for the callback)<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
0
<font color=green><span style='color:green'>// and no flags<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> LPCWSTR szFileName =
DEFAULT_FILE;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> BYTE *pSrcData= <font
color=blue><span style='color:blue'>new</span></font> BYTE[2500];<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <font color=blue><span
style='color:blue'>char</span></font> *data = <font color=blue><span
style='color:blue'>new</span></font> <font color=blue><span style='color:blue'>char</span></font>[2500];<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> FILE *outf =fopen(<font
color="#a31515"><span style='color:#A31515'>"E:\\Bomb.ogg"</span></font>,<font
color="#a31515"><span style='color:#A31515'>"rb+"</span></font>);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> LONG dwSrcBytes =
fread(pSrcData,1,2500,outf);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> DWORD dwDst1Bytes = 0;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> mmr = acmStreamSize(
g_wavstream, dwSrcBytes, &dwDst1Bytes, ACM_STREAMSIZEF_SOURCE);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <font color=green><span
style='color:green'>// allocate a buffer for the result of the conversion.<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> BYTE* pDst1Data = <font
color=blue><span style='color:blue'>new</span></font> BYTE [dwDst1Bytes];<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <font color=green><span
style='color:green'>// fill in the conversion info<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> ACMSTREAMHEADER strhdr;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> memset(&strhdr, 0, <font
color=blue><span style='color:blue'>sizeof</span></font>(strhdr));<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> strhdr.cbStruct = <font
color=blue><span style='color:blue'>sizeof</span></font>(strhdr);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> strhdr.pbSrc = pSrcData; <font
color=green><span style='color:green'>// the source data to convert<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> strhdr.cbSrcLength =
dwSrcBytes;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> strhdr.pbDst = pDst1Data;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> strhdr.cbDstLength =
dwDst1Bytes;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=green face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:green'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <font color=green><span
style='color:green'>// prep the header<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> mmr =
acmStreamPrepareHeader(g_wavstream, &strhdr, 0); <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <font color=green><span
style='color:green'>// convert the data<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> printf(<font color="#a31515"><span
style='color:#A31515'>"Converting to intermediate PCM format...\n"</span></font>);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> mmr =
acmStreamConvert(g_wavstream, &strhdr, 0);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <font color=blue><span
style='color:blue'>if</span></font> (mmr) {<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
printf(<font color="#a31515"><span style='color:#A31515'>"Failed to do PCM
to PCM conversion\n"</span></font>);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>
exit(1);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> }<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> printf(<font color="#a31515"><span
style='color:#A31515'>"Converted OK\n"</span></font>);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <font color=green><span
style='color:green'>// close the stream<o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> acmStreamClose(g_wavstream,
0);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>What should be the values for nBlockAlign and cbSize of
WAVEFORMATEX? Can I get any samples for decoding OGG format to PCM format
with vorbis.acm?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Sujitha<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
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