classpwavfile.html

pwlib开发文档

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<a name="z495_5" doxytag="PWAVFile::SetPosition"></a><p>
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          <td class="md" nowrap valign="top"> virtual BOOL PWAVFile::SetPosition </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">off_t&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>pos</em>, </td>
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          <td class="md" nowrap><a class="el" href="classPFile.html#z133_0">FilePositionOrigin</a>&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>origin</em> = Start</td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [virtual]</code></td>
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Set the current active position in the file for the next read or write operation. The pos# variable is a signed number which is added to the specified origin. For origin == <a class="el" href="classPFile.html#z133_0s11">PFile::Start</a># only positive values for pos# are meaningful. For origin == <a class="el" href="classPFile.html#z133_0s13">PFile::End</a># only negative values for pos# are meaningful.
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Note that for a WAV file, the origin of the file is right after the header. That is, the WAV header is not included when perform <a class="el" href="classPWAVFile.html#z495_5">SetPosition()</a>.
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<dl compact><dt><b>Returns: </b></dt><dd>
 TRUE if the new file position was set. </dl><dl compact><dt><b>Parameters: </b></dt><dd>
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<tr><td valign=top><em>origin</em>&nbsp;</td><td>
New position to set. Origin for position change. </td></tr>
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Reimplemented from <a class="el" href="classPFile.html#z133_7">PFile</a>.    </td>
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<a name="z497_7" doxytag="PWAVFile::SetSampleRate"></a><p>
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          <td class="md" nowrap valign="top"> virtual void PWAVFile::SetSampleRate </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">unsigned&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>&nbsp; <em>v</em>          </td>
          <td class="md" valign="top">)&nbsp;</td>
          <td class="md" nowrap><code> [virtual]</code></td>
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<a name="z497_9" doxytag="PWAVFile::SetSampleSize"></a><p>
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          <td class="md" nowrap valign="top"> virtual void PWAVFile::SetSampleSize </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">unsigned&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>&nbsp; <em>v</em>          </td>
          <td class="md" valign="top">)&nbsp;</td>
          <td class="md" nowrap><code> [virtual]</code></td>
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<a name="b5" doxytag="PWAVFile::UpdateHeader"></a><p>
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          <td class="md" nowrap valign="top"> BOOL PWAVFile::UpdateHeader </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>&nbsp;          </td>
          <td class="md" valign="top">)&nbsp;</td>
          <td class="md" nowrap><code> [protected]</code></td>
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<a name="z495_1" doxytag="PWAVFile::Write"></a><p>
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          <td class="md" nowrap valign="top"> virtual BOOL PWAVFile::Write </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const void *&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>buf</em>, </td>
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          <td class="md" nowrap>PINDEX&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>len</em></td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [virtual]</code></td>
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<p>
Call <a class="el" href="classPFile.html#z129_2">PFile::Write()</a> to write out audio data and perform necessary processing such as byte-order swaping.
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<dl compact><dt><b>Returns: </b></dt><dd>
 TRUE indicates that at least one character was written to the channel. FALSE means no bytes were written due to timeout or some other I/O error. </dl><dl compact><dt><b>Parameters: </b></dt><dd>
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<tr><td valign=top><em>len</em>&nbsp;</td><td>
Pointer to a block of memory to receive the write bytes. Maximum number of bytes to write to the channel. </td></tr>
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Reimplemented from <a class="el" href="classPFile.html#z129_2">PFile</a>.    </td>
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<hr><h2>Friends And Related Function Documentation</h2>
<a name="l0" doxytag="PWAVFile::PWAVFileConverter"></a><p>
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          <td class="md" nowrap valign="top"> friend class PWAVFileConverter<code> [friend]</code>
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<hr><h2>Member Data Documentation</h2>
<a name="n3" doxytag="PWAVFile::autoConvert"></a><p>
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          <td class="md" nowrap valign="top"> BOOL PWAVFile::autoConvert<code> [protected]</code>
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<a name="n4" doxytag="PWAVFile::autoConverter"></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="classPWAVFileConverter.html">PWAVFileConverter</a>* PWAVFile::autoConverter<code> [protected]</code>
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<a name="m1" doxytag="PWAVFile::extendedHeader"></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="classPBYTEArray.html">PBYTEArray</a> PWAVFile::extendedHeader
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<a name="n2" doxytag="PWAVFile::formatHandler"></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="classPWAVFileFormat.html">PWAVFileFormat</a>* PWAVFile::formatHandler<code> [protected]</code>
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<a name="n7" doxytag="PWAVFile::header_needs_updating"></a><p>
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          <td class="md" nowrap valign="top"> BOOL PWAVFile::header_needs_updating<code> [protected]</code>
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<a name="n1" doxytag="PWAVFile::isValidWAV"></a><p>
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          <td class="md" nowrap valign="top"> BOOL PWAVFile::isValidWAV<code> [protected]</code>
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<a name="n6" doxytag="PWAVFile::lenData"></a><p>
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          <td class="md" nowrap valign="top"> off_t PWAVFile::lenData<code> [protected]</code>
      <