573 lines
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HTML
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<h1 class="title">GEAudioBuffer.cpp Example File</h1>
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<span class="small-subtitle">demos/mobile/quickhit/ga_src/GEAudioBuffer.cpp</span>
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<!-- $$$demos/mobile/quickhit/ga_src/GEAudioBuffer.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtDeclarative module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include <QDebug></span>
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<span class="preprocessor">#include <math.h></span>
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<span class="preprocessor">#include "GEAudioBuffer.h"</span>
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<span class="keyword">using</span> <span class="keyword">namespace</span> GE;
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<span class="keyword">struct</span> SWavHeader {
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<span class="type">char</span> chunkID<span class="operator">[</span><span class="number">4</span><span class="operator">]</span>;
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<span class="type">unsigned</span> <span class="type">int</span> chunkSize;
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<span class="type">char</span> format<span class="operator">[</span><span class="number">4</span><span class="operator">]</span>;
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<span class="type">unsigned</span> <span class="type">char</span> subchunk1id<span class="operator">[</span><span class="number">4</span><span class="operator">]</span>;
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<span class="type">unsigned</span> <span class="type">int</span> subchunk1size;
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<span class="type">unsigned</span> <span class="type">short</span> audioFormat;
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<span class="type">unsigned</span> <span class="type">short</span> nofChannels;
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<span class="type">unsigned</span> <span class="type">int</span> sampleRate;
|
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<span class="type">unsigned</span> <span class="type">int</span> byteRate;
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<span class="type">unsigned</span> <span class="type">short</span> blockAlign;
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|
<span class="type">unsigned</span> <span class="type">short</span> bitsPerSample;
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<span class="type">unsigned</span> <span class="type">char</span> subchunk2id<span class="operator">[</span><span class="number">4</span><span class="operator">]</span>;
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<span class="type">unsigned</span> <span class="type">int</span> subchunk2size;
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};
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CAudioBuffer<span class="operator">::</span>CAudioBuffer() {
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m_data <span class="operator">=</span> <span class="number">0</span>;
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m_dataLength <span class="operator">=</span> <span class="number">0</span>;
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m_sampleFunction <span class="operator">=</span> <span class="number">0</span>;
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|
};
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CAudioBuffer<span class="operator">::</span><span class="operator">~</span>CAudioBuffer() {
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reallocate(<span class="number">0</span>);
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|
}
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|
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<span class="type">void</span> CAudioBuffer<span class="operator">::</span>reallocate( <span class="type">int</span> length ) {
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<span class="keyword">if</span> (m_data) <span class="keyword">delete</span> <span class="operator">[</span><span class="operator">]</span> ((<span class="type">char</span><span class="operator">*</span>)m_data);
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m_dataLength <span class="operator">=</span> length;
|
|
<span class="keyword">if</span> (m_dataLength<span class="operator">></span><span class="number">0</span>) {
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m_data <span class="operator">=</span> <span class="keyword">new</span> <span class="type">char</span><span class="operator">[</span> m_dataLength <span class="operator">]</span>;
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} <span class="keyword">else</span> m_data <span class="operator">=</span> <span class="number">0</span>;
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};
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CAudioBuffer<span class="operator">*</span> CAudioBuffer<span class="operator">::</span>loadWav( <span class="type"><a href="qstring.html">QString</a></span> fileName ) {
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<span class="type"><a href="qfile.html">QFile</a></span> <span class="operator">*</span>wavFile <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qfile.html">QFile</a></span>( fileName );
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<span class="keyword">if</span> (wavFile<span class="operator">-</span><span class="operator">></span>open(<span class="type"><a href="qiodevice.html">QIODevice</a></span><span class="operator">::</span>ReadOnly)) {
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SWavHeader header;
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wavFile<span class="operator">-</span><span class="operator">></span>read( header<span class="operator">.</span>chunkID<span class="operator">,</span> <span class="number">4</span> );
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<span class="keyword">if</span> (header<span class="operator">.</span>chunkID<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'R'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>chunkID<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'I'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>chunkID<span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'F'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>chunkID<span class="operator">[</span><span class="number">3</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'F'</span>) <span class="keyword">return</span> <span class="number">0</span>; <span class="comment">// incorrect header</span>
|
|
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>chunkSize<span class="operator">,</span><span class="number">4</span> );
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|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>format<span class="operator">,</span><span class="number">4</span> );
|
|
|
|
<span class="keyword">if</span> (header<span class="operator">.</span>format<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'W'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>format<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'A'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>format<span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'V'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>format<span class="operator">[</span><span class="number">3</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'E'</span>) <span class="keyword">return</span> <span class="number">0</span>; <span class="comment">// incorrect header</span>
|
|
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>subchunk1id<span class="operator">,</span><span class="number">4</span> );
|
|
<span class="keyword">if</span> (header<span class="operator">.</span>subchunk1id<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'f'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>subchunk1id<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'m'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>subchunk1id<span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'t'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>subchunk1id<span class="operator">[</span><span class="number">3</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">' '</span>) <span class="keyword">return</span> <span class="number">0</span>; <span class="comment">// incorrect header</span>
|
|
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>subchunk1size<span class="operator">,</span><span class="number">4</span> );
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>audioFormat<span class="operator">,</span><span class="number">2</span> );
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>nofChannels<span class="operator">,</span><span class="number">2</span> );
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>sampleRate<span class="operator">,</span><span class="number">4</span> );
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>byteRate<span class="operator">,</span><span class="number">4</span> );
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>blockAlign<span class="operator">,</span><span class="number">2</span> );
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>bitsPerSample<span class="operator">,</span><span class="number">2</span> );
|
|
|
|
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> fileName <span class="operator"><</span><span class="operator"><</span> <span class="string">" opened"</span>;
|
|
|
|
<span class="keyword">while</span> (<span class="number">1</span>) {
|
|
<span class="keyword">if</span> (wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>subchunk2id<span class="operator">,</span><span class="number">4</span> ) <span class="operator">!</span><span class="operator">=</span> <span class="number">4</span>) <span class="keyword">return</span> <span class="number">0</span>;
|
|
<span class="keyword">if</span> (wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)<span class="operator">&</span>header<span class="operator">.</span>subchunk2size<span class="operator">,</span><span class="number">4</span> ) <span class="operator">!</span><span class="operator">=</span> <span class="number">4</span>) <span class="keyword">return</span> <span class="number">0</span>;
|
|
<span class="comment">//int deb_size = header.subchunk2size;</span>
|
|
<span class="comment">//char tes[4];</span>
|
|
<span class="comment">//memcpy(tes, header.subchunk2id, 4 );</span>
|
|
<span class="comment">//if (header.subchunk2id[0]!='d' || header.subchunk2id[1]!='a' || header.subchunk2id[2]!='t' || header.subchunk2id[3]!='a') return 0; // incorrect header</span>
|
|
<span class="keyword">if</span> (header<span class="operator">.</span>subchunk2id<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">=</span><span class="operator">=</span><span class="char">'d'</span> <span class="operator">&</span><span class="operator">&</span> header<span class="operator">.</span>subchunk2id<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">=</span><span class="operator">=</span><span class="char">'a'</span> <span class="operator">&</span><span class="operator">&</span> header<span class="operator">.</span>subchunk2id<span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">=</span><span class="operator">=</span><span class="char">'t'</span> <span class="operator">&</span><span class="operator">&</span> header<span class="operator">.</span>subchunk2id<span class="operator">[</span><span class="number">3</span><span class="operator">]</span><span class="operator">=</span><span class="operator">=</span><span class="char">'a'</span>) <span class="keyword">break</span>; <span class="comment">// found the data, chunk</span>
|
|
<span class="comment">// this was not the data-chunk. skip it</span>
|
|
<span class="keyword">if</span> (header<span class="operator">.</span>subchunk2size<span class="operator"><</span><span class="number">1</span>) <span class="keyword">return</span> <span class="number">0</span>; <span class="comment">// error in file</span>
|
|
<span class="type">char</span> <span class="operator">*</span>unused <span class="operator">=</span> <span class="keyword">new</span> <span class="type">char</span><span class="operator">[</span>header<span class="operator">.</span>subchunk2size<span class="operator">]</span>;
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( unused<span class="operator">,</span> header<span class="operator">.</span>subchunk2size );
|
|
<span class="keyword">delete</span> <span class="operator">[</span><span class="operator">]</span> unused;
|
|
}
|
|
|
|
<span class="comment">// the data follows.</span>
|
|
<span class="keyword">if</span> (header<span class="operator">.</span>subchunk2size<span class="operator"><</span><span class="number">1</span>) <span class="keyword">return</span> <span class="number">0</span>;
|
|
|
|
CAudioBuffer <span class="operator">*</span>rval <span class="operator">=</span> <span class="keyword">new</span> CAudioBuffer;
|
|
rval<span class="operator">-</span><span class="operator">></span>m_nofChannels <span class="operator">=</span> header<span class="operator">.</span>nofChannels;
|
|
rval<span class="operator">-</span><span class="operator">></span>m_bitsPerSample <span class="operator">=</span> header<span class="operator">.</span>bitsPerSample;
|
|
rval<span class="operator">-</span><span class="operator">></span>m_samplesPerSec <span class="operator">=</span> header<span class="operator">.</span>sampleRate;
|
|
rval<span class="operator">-</span><span class="operator">></span>m_signedData <span class="operator">=</span> <span class="number">0</span>; <span class="comment">// where to know this?</span>
|
|
rval<span class="operator">-</span><span class="operator">></span>reallocate( header<span class="operator">.</span>subchunk2size );
|
|
|
|
wavFile<span class="operator">-</span><span class="operator">></span>read( (<span class="type">char</span><span class="operator">*</span>)rval<span class="operator">-</span><span class="operator">></span>m_data<span class="operator">,</span> header<span class="operator">.</span>subchunk2size );
|
|
|
|
<span class="comment">// choose a good sampling function.</span>
|
|
rval<span class="operator">-</span><span class="operator">></span>m_sampleFunction <span class="operator">=</span> <span class="number">0</span>;
|
|
<span class="keyword">if</span> (rval<span class="operator">-</span><span class="operator">></span>m_nofChannels<span class="operator">=</span><span class="operator">=</span><span class="number">1</span>) {
|
|
<span class="keyword">if</span> (rval<span class="operator">-</span><span class="operator">></span>m_bitsPerSample <span class="operator">=</span><span class="operator">=</span> <span class="number">8</span>) rval<span class="operator">-</span><span class="operator">></span>m_sampleFunction <span class="operator">=</span> sampleFunction8bitMono;
|
|
<span class="keyword">if</span> (rval<span class="operator">-</span><span class="operator">></span>m_bitsPerSample <span class="operator">=</span><span class="operator">=</span> <span class="number">16</span>) rval<span class="operator">-</span><span class="operator">></span>m_sampleFunction <span class="operator">=</span> sampleFunction16bitMono;
|
|
} <span class="keyword">else</span> {
|
|
<span class="keyword">if</span> (rval<span class="operator">-</span><span class="operator">></span>m_bitsPerSample <span class="operator">=</span><span class="operator">=</span> <span class="number">8</span>) rval<span class="operator">-</span><span class="operator">></span>m_sampleFunction <span class="operator">=</span> sampleFunction8bitStereo;
|
|
<span class="keyword">if</span> (rval<span class="operator">-</span><span class="operator">></span>m_bitsPerSample <span class="operator">=</span><span class="operator">=</span> <span class="number">16</span>) rval<span class="operator">-</span><span class="operator">></span>m_sampleFunction <span class="operator">=</span> sampleFunction16bitStereo;
|
|
}
|
|
|
|
<span class="keyword">return</span> rval;
|
|
|
|
} <span class="keyword">else</span> {
|
|
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> fileName <span class="operator"><</span><span class="operator"><</span> <span class="string">" NOT opened"</span>;
|
|
<span class="keyword">return</span> <span class="number">0</span>;
|
|
}
|
|
|
|
<span class="keyword">delete</span> wavFile;
|
|
};
|
|
|
|
CAudioBuffer<span class="operator">*</span> CAudioBuffer<span class="operator">::</span>loadWav( FILE <span class="operator">*</span>wavFile ) {
|
|
<span class="comment">// read the header.</span>
|
|
SWavHeader header;
|
|
fread( header<span class="operator">.</span>chunkID<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
<span class="keyword">if</span> (header<span class="operator">.</span>chunkID<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'R'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>chunkID<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'I'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>chunkID<span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'F'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>chunkID<span class="operator">[</span><span class="number">3</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'F'</span>) <span class="keyword">return</span> <span class="number">0</span>; <span class="comment">// incorrect header</span>
|
|
|
|
fread( <span class="operator">&</span>header<span class="operator">.</span>chunkSize<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
fread( header<span class="operator">.</span>format<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
<span class="keyword">if</span> (header<span class="operator">.</span>format<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'W'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>format<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'A'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>format<span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'V'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>format<span class="operator">[</span><span class="number">3</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'E'</span>) <span class="keyword">return</span> <span class="number">0</span>; <span class="comment">// incorrect header</span>
|
|
|
|
fread( header<span class="operator">.</span>subchunk1id<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
<span class="keyword">if</span> (header<span class="operator">.</span>subchunk1id<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'f'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>subchunk1id<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'m'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>subchunk1id<span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'t'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>subchunk1id<span class="operator">[</span><span class="number">3</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">' '</span>) <span class="keyword">return</span> <span class="number">0</span>; <span class="comment">// incorrect header</span>
|
|
|
|
fread( <span class="operator">&</span>header<span class="operator">.</span>subchunk1size<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
fread( <span class="operator">&</span>header<span class="operator">.</span>audioFormat<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
fread( <span class="operator">&</span>header<span class="operator">.</span>nofChannels<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
fread( <span class="operator">&</span>header<span class="operator">.</span>sampleRate<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
fread( <span class="operator">&</span>header<span class="operator">.</span>byteRate<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
|
|
fread( <span class="operator">&</span>header<span class="operator">.</span>blockAlign<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
fread( <span class="operator">&</span>header<span class="operator">.</span>bitsPerSample<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
|
|
fread( header<span class="operator">.</span>subchunk2id<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
<span class="keyword">if</span> (header<span class="operator">.</span>subchunk2id<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'d'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>subchunk2id<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'a'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>subchunk2id<span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'t'</span> <span class="operator">|</span><span class="operator">|</span> header<span class="operator">.</span>subchunk2id<span class="operator">[</span><span class="number">3</span><span class="operator">]</span><span class="operator">!</span><span class="operator">=</span><span class="char">'a'</span>) <span class="keyword">return</span> <span class="number">0</span>; <span class="comment">// incorrect header</span>
|
|
fread( <span class="operator">&</span>header<span class="operator">.</span>subchunk2size<span class="operator">,</span> <span class="number">4</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> wavFile );
|
|
|
|
<span class="comment">// the data follows.</span>
|
|
<span class="keyword">if</span> (header<span class="operator">.</span>subchunk2size<span class="operator"><</span><span class="number">1</span>) <span class="keyword">return</span> <span class="number">0</span>;
|
|
|
|
CAudioBuffer <span class="operator">*</span>rval <span class="operator">=</span> <span class="keyword">new</span> CAudioBuffer;
|
|
rval<span class="operator">-</span><span class="operator">></span>m_nofChannels <span class="operator">=</span> header<span class="operator">.</span>nofChannels;
|
|
rval<span class="operator">-</span><span class="operator">></span>m_bitsPerSample <span class="operator">=</span> header<span class="operator">.</span>bitsPerSample;
|
|
rval<span class="operator">-</span><span class="operator">></span>m_samplesPerSec <span class="operator">=</span> header<span class="operator">.</span>sampleRate;
|
|
rval<span class="operator">-</span><span class="operator">></span>m_signedData <span class="operator">=</span> <span class="number">0</span>; <span class="comment">// where to know this?</span>
|
|
rval<span class="operator">-</span><span class="operator">></span>reallocate( header<span class="operator">.</span>subchunk2size );
|
|
|
|
fread( rval<span class="operator">-</span><span class="operator">></span>m_data<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> header<span class="operator">.</span>subchunk2size<span class="operator">,</span> wavFile );
|
|
|
|
<span class="comment">// choose a good sampling function.</span>
|
|
rval<span class="operator">-</span><span class="operator">></span>m_sampleFunction <span class="operator">=</span> <span class="number">0</span>;
|
|
<span class="keyword">if</span> (rval<span class="operator">-</span><span class="operator">></span>m_nofChannels<span class="operator">=</span><span class="operator">=</span><span class="number">1</span>) {
|
|
<span class="keyword">if</span> (rval<span class="operator">-</span><span class="operator">></span>m_bitsPerSample <span class="operator">=</span><span class="operator">=</span> <span class="number">8</span>) rval<span class="operator">-</span><span class="operator">></span>m_sampleFunction <span class="operator">=</span> sampleFunction8bitMono;
|
|
<span class="keyword">if</span> (rval<span class="operator">-</span><span class="operator">></span>m_bitsPerSample <span class="operator">=</span><span class="operator">=</span> <span class="number">16</span>) rval<span class="operator">-</span><span class="operator">></span>m_sampleFunction <span class="operator">=</span> sampleFunction16bitMono;
|
|
} <span class="keyword">else</span> {
|
|
<span class="keyword">if</span> (rval<span class="operator">-</span><span class="operator">></span>m_bitsPerSample <span class="operator">=</span><span class="operator">=</span> <span class="number">8</span>) rval<span class="operator">-</span><span class="operator">></span>m_sampleFunction <span class="operator">=</span> sampleFunction8bitStereo;
|
|
<span class="keyword">if</span> (rval<span class="operator">-</span><span class="operator">></span>m_bitsPerSample <span class="operator">=</span><span class="operator">=</span> <span class="number">16</span>) rval<span class="operator">-</span><span class="operator">></span>m_sampleFunction <span class="operator">=</span> sampleFunction16bitStereo;
|
|
}
|
|
|
|
<span class="keyword">return</span> rval;
|
|
};
|
|
|
|
AUDIO_SAMPLE_TYPE CAudioBuffer<span class="operator">::</span>sampleFunction8bitMono( CAudioBuffer <span class="operator">*</span>abuffer<span class="operator">,</span> <span class="type">int</span> pos<span class="operator">,</span> <span class="type">int</span> channel ) {
|
|
<span class="keyword">return</span> (AUDIO_SAMPLE_TYPE)(((<span class="type">unsigned</span> <span class="type">char</span><span class="operator">*</span>)(abuffer<span class="operator">-</span><span class="operator">></span>m_data))<span class="operator">[</span>pos<span class="operator">]</span><span class="operator">-</span><span class="number">128</span>)<span class="operator"><</span><span class="operator"><</span><span class="number">8</span>;
|
|
};
|
|
|
|
AUDIO_SAMPLE_TYPE CAudioBuffer<span class="operator">::</span>sampleFunction16bitMono( CAudioBuffer <span class="operator">*</span>abuffer<span class="operator">,</span> <span class="type">int</span> pos<span class="operator">,</span> <span class="type">int</span> channel ) {
|
|
<span class="keyword">return</span> (AUDIO_SAMPLE_TYPE)(((<span class="type">short</span><span class="operator">*</span>)(abuffer<span class="operator">-</span><span class="operator">></span>m_data))<span class="operator">[</span>pos<span class="operator">]</span>);
|
|
};
|
|
|
|
AUDIO_SAMPLE_TYPE CAudioBuffer<span class="operator">::</span>sampleFunction8bitStereo( CAudioBuffer <span class="operator">*</span>abuffer<span class="operator">,</span> <span class="type">int</span> pos<span class="operator">,</span> <span class="type">int</span> channel ) {
|
|
<span class="keyword">return</span> ((AUDIO_SAMPLE_TYPE)(((<span class="type">char</span><span class="operator">*</span>)(abuffer<span class="operator">-</span><span class="operator">></span>m_data))<span class="operator">[</span>pos<span class="operator">*</span>abuffer<span class="operator">-</span><span class="operator">></span>m_nofChannels <span class="operator">+</span> channel<span class="operator">]</span>)<span class="operator"><</span><span class="operator"><</span><span class="number">8</span>);
|
|
};
|
|
|
|
AUDIO_SAMPLE_TYPE CAudioBuffer<span class="operator">::</span>sampleFunction16bitStereo( CAudioBuffer <span class="operator">*</span>abuffer<span class="operator">,</span> <span class="type">int</span> pos<span class="operator">,</span> <span class="type">int</span> channel ) {
|
|
<span class="keyword">return</span> (AUDIO_SAMPLE_TYPE)(((<span class="type">short</span><span class="operator">*</span>)(abuffer<span class="operator">-</span><span class="operator">></span>m_data))<span class="operator">[</span>pos<span class="operator">*</span>abuffer<span class="operator">-</span><span class="operator">></span>m_nofChannels <span class="operator">+</span> channel<span class="operator">]</span>);
|
|
};
|
|
|
|
CAudioBufferPlayInstance <span class="operator">*</span>CAudioBuffer<span class="operator">::</span>playWithMixer( CAudioMixer <span class="operator">&</span>mixer ) {
|
|
CAudioBufferPlayInstance <span class="operator">*</span>i <span class="operator">=</span> (CAudioBufferPlayInstance<span class="operator">*</span>)mixer<span class="operator">.</span>addAudioSource( <span class="keyword">new</span> CAudioBufferPlayInstance( <span class="keyword">this</span> ));
|
|
<span class="keyword">return</span> i;
|
|
};
|
|
|
|
CAudioBufferPlayInstance<span class="operator">::</span>CAudioBufferPlayInstance() {
|
|
m_fixedPos <span class="operator">=</span> <span class="number">0</span>;
|
|
m_fixedInc <span class="operator">=</span> <span class="number">0</span>;
|
|
m_buffer <span class="operator">=</span> <span class="number">0</span>;
|
|
m_fixedLeftVolume <span class="operator">=</span> <span class="number">4096</span>;
|
|
m_fixedRightVolume <span class="operator">=</span> <span class="number">4096</span>;
|
|
m_destroyWhenFinished <span class="operator">=</span> <span class="keyword">true</span>;
|
|
m_finished <span class="operator">=</span> <span class="keyword">false</span>;
|
|
};
|
|
|
|
CAudioBufferPlayInstance<span class="operator">::</span>CAudioBufferPlayInstance( CAudioBuffer <span class="operator">*</span>startPlaying ) {
|
|
m_fixedPos <span class="operator">=</span> <span class="number">0</span>;
|
|
m_fixedInc <span class="operator">=</span> <span class="number">0</span>;
|
|
m_fixedLeftVolume <span class="operator">=</span> <span class="number">4096</span>;
|
|
m_fixedRightVolume <span class="operator">=</span> <span class="number">4096</span>;
|
|
m_destroyWhenFinished <span class="operator">=</span> <span class="keyword">true</span>;
|
|
m_finished <span class="operator">=</span> <span class="keyword">false</span>;
|
|
playBuffer( startPlaying<span class="operator">,</span> <span class="number">1.0f</span><span class="operator">,</span> <span class="number">1.0f</span> );
|
|
};
|
|
|
|
<span class="type">void</span> CAudioBufferPlayInstance<span class="operator">::</span>playBuffer( CAudioBuffer <span class="operator">*</span>startPlaying<span class="operator">,</span> <span class="type">float</span> volume<span class="operator">,</span> <span class="type">float</span> speed<span class="operator">,</span> <span class="type">int</span> loopTimes ) {
|
|
m_buffer <span class="operator">=</span> startPlaying;
|
|
m_fixedLeftVolume <span class="operator">=</span> (<span class="type">int</span>)(<span class="number">4096.0f</span><span class="operator">*</span>volume);
|
|
m_fixedRightVolume <span class="operator">=</span> m_fixedLeftVolume;
|
|
m_fixedPos <span class="operator">=</span> <span class="number">0</span>;
|
|
<span class="comment">//m_fixedInc = ( startPlaying->getSamplesPerSec() * (int)(4096.0f*speed)) / AUDIO_FREQUENCY;</span>
|
|
setSpeed( speed );
|
|
m_loopTimes <span class="operator">=</span> loopTimes;
|
|
|
|
};
|
|
|
|
CAudioBufferPlayInstance<span class="operator">::</span><span class="operator">~</span>CAudioBufferPlayInstance() {
|
|
|
|
};
|
|
|
|
<span class="type">void</span> CAudioBufferPlayInstance<span class="operator">::</span>stop() {
|
|
m_buffer <span class="operator">=</span> <span class="number">0</span>;
|
|
m_finished <span class="operator">=</span> <span class="keyword">true</span>;
|
|
};
|
|
|
|
<span class="type">void</span> CAudioBufferPlayInstance<span class="operator">::</span>setSpeed( <span class="type">float</span> speed ) {
|
|
<span class="keyword">if</span> (<span class="operator">!</span>m_buffer) <span class="keyword">return</span>;
|
|
m_fixedInc <span class="operator">=</span> (<span class="type">int</span>)( ((<span class="type">float</span>)m_buffer<span class="operator">-</span><span class="operator">></span>getSamplesPerSec() <span class="operator">*</span> <span class="number">4096.0f</span><span class="operator">*</span>speed) <span class="operator">/</span> (<span class="type">float</span>)AUDIO_FREQUENCY );
|
|
};
|
|
|
|
<span class="type">void</span> CAudioBufferPlayInstance<span class="operator">::</span>setLeftVolume( <span class="type">float</span> vol ) {
|
|
m_fixedLeftVolume <span class="operator">=</span> (<span class="type">int</span>)(<span class="number">4096.0f</span><span class="operator">*</span>vol);
|
|
};
|
|
|
|
<span class="type">void</span> CAudioBufferPlayInstance<span class="operator">::</span>setRightVolume( <span class="type">float</span> vol ) {
|
|
m_fixedRightVolume <span class="operator">=</span> (<span class="type">int</span>)(<span class="number">4096.0f</span><span class="operator">*</span>vol);
|
|
};
|
|
|
|
<span class="type">bool</span> CAudioBufferPlayInstance<span class="operator">::</span>canBeDestroyed() {
|
|
<span class="keyword">if</span> (m_finished<span class="operator">=</span><span class="operator">=</span><span class="keyword">true</span> <span class="operator">&</span><span class="operator">&</span>
|
|
m_destroyWhenFinished<span class="operator">=</span><span class="operator">=</span><span class="keyword">true</span>) <span class="keyword">return</span> <span class="keyword">true</span>; <span class="keyword">else</span> <span class="keyword">return</span> <span class="keyword">false</span>;
|
|
};
|
|
|
|
<span class="comment">// Does not do any bound-checking. Must be checked before called.</span>
|
|
<span class="type">int</span> CAudioBufferPlayInstance<span class="operator">::</span>mixBlock( AUDIO_SAMPLE_TYPE <span class="operator">*</span>target<span class="operator">,</span> <span class="type">int</span> samplesToMix ) {
|
|
SAMPLE_FUNCTION_TYPE sampleFunction <span class="operator">=</span> m_buffer<span class="operator">-</span><span class="operator">></span>getSampleFunction();
|
|
<span class="keyword">if</span> (<span class="operator">!</span>sampleFunction) <span class="keyword">return</span> <span class="number">0</span>; <span class="comment">// unsupported sampletype</span>
|
|
AUDIO_SAMPLE_TYPE <span class="operator">*</span>t_target <span class="operator">=</span> target<span class="operator">+</span>samplesToMix<span class="operator">*</span><span class="number">2</span>;
|
|
<span class="type">int</span> sourcepos;
|
|
<span class="comment">//int tempCounter = 0;</span>
|
|
|
|
<span class="keyword">if</span> (m_buffer<span class="operator">-</span><span class="operator">></span>getNofChannels() <span class="operator">=</span><span class="operator">=</span> <span class="number">2</span>) { <span class="comment">// stereo</span>
|
|
<span class="keyword">while</span> (target<span class="operator">!</span><span class="operator">=</span>t_target) {
|
|
sourcepos <span class="operator">=</span> m_fixedPos<span class="operator">></span><span class="operator">></span><span class="number">12</span>;
|
|
target<span class="operator">[</span><span class="number">0</span><span class="operator">]</span> <span class="operator">=</span> (((((sampleFunction)( m_buffer<span class="operator">,</span> sourcepos<span class="operator">,</span> <span class="number">0</span>) <span class="operator">*</span> (<span class="number">4096</span><span class="operator">-</span>(m_fixedPos<span class="operator">&</span><span class="number">4095</span>)) <span class="operator">+</span> (sampleFunction)( m_buffer<span class="operator">,</span> sourcepos<span class="operator">+</span><span class="number">1</span><span class="operator">,</span> <span class="number">0</span>) <span class="operator">*</span> (m_fixedPos<span class="operator">&</span><span class="number">4095</span>) ) <span class="operator">></span><span class="operator">></span> <span class="number">12</span>) <span class="operator">*</span> m_fixedLeftVolume) <span class="operator">></span><span class="operator">></span> <span class="number">12</span>);
|
|
target<span class="operator">[</span><span class="number">1</span><span class="operator">]</span> <span class="operator">=</span> (((((sampleFunction)( m_buffer<span class="operator">,</span> sourcepos<span class="operator">,</span> <span class="number">1</span>) <span class="operator">*</span> (<span class="number">4096</span><span class="operator">-</span>(m_fixedPos<span class="operator">&</span><span class="number">4095</span>)) <span class="operator">+</span> (sampleFunction)( m_buffer<span class="operator">,</span> sourcepos<span class="operator">+</span><span class="number">1</span><span class="operator">,</span> <span class="number">1</span>) <span class="operator">*</span> (m_fixedPos<span class="operator">&</span><span class="number">4095</span>) ) <span class="operator">></span><span class="operator">></span> <span class="number">12</span>) <span class="operator">*</span> m_fixedRightVolume) <span class="operator">></span><span class="operator">></span> <span class="number">12</span>);
|
|
m_fixedPos<span class="operator">+</span><span class="operator">=</span>m_fixedInc;
|
|
target<span class="operator">+</span><span class="operator">=</span><span class="number">2</span>;
|
|
<span class="comment">//tempCounter++;</span>
|
|
};
|
|
} <span class="keyword">else</span> { <span class="comment">// mono</span>
|
|
<span class="type">int</span> temp;
|
|
<span class="keyword">while</span> (target<span class="operator">!</span><span class="operator">=</span>t_target) {
|
|
sourcepos <span class="operator">=</span> m_fixedPos<span class="operator">></span><span class="operator">></span><span class="number">12</span>;
|
|
temp <span class="operator">=</span> (((sampleFunction)( m_buffer<span class="operator">,</span> sourcepos<span class="operator">,</span> <span class="number">0</span> ) <span class="operator">*</span> (<span class="number">4096</span><span class="operator">-</span>(m_fixedPos<span class="operator">&</span><span class="number">4095</span>)) <span class="operator">+</span> (sampleFunction)( m_buffer<span class="operator">,</span> sourcepos<span class="operator">+</span><span class="number">1</span><span class="operator">,</span> <span class="number">0</span> ) <span class="operator">*</span> (m_fixedPos<span class="operator">&</span><span class="number">4095</span>) ) <span class="operator">></span><span class="operator">></span> <span class="number">12</span>);
|
|
target<span class="operator">[</span><span class="number">0</span><span class="operator">]</span> <span class="operator">=</span> ((temp<span class="operator">*</span>m_fixedLeftVolume)<span class="operator">></span><span class="operator">></span><span class="number">12</span>);
|
|
target<span class="operator">[</span><span class="number">1</span><span class="operator">]</span> <span class="operator">=</span> ((temp<span class="operator">*</span>m_fixedRightVolume)<span class="operator">></span><span class="operator">></span><span class="number">12</span>);
|
|
m_fixedPos<span class="operator">+</span><span class="operator">=</span>m_fixedInc;
|
|
target<span class="operator">+</span><span class="operator">=</span><span class="number">2</span>;
|
|
<span class="comment">//tempCounter++;</span>
|
|
};
|
|
|
|
};
|
|
|
|
<span class="keyword">return</span> samplesToMix;
|
|
};
|
|
|
|
<span class="type">int</span> CAudioBufferPlayInstance<span class="operator">::</span>pullAudio( AUDIO_SAMPLE_TYPE <span class="operator">*</span>target<span class="operator">,</span> <span class="type">int</span> bufferLength ) {
|
|
<span class="keyword">if</span> (<span class="operator">!</span>m_buffer) <span class="keyword">return</span> <span class="number">0</span>; <span class="comment">// no sample associated to mix..</span>
|
|
|
|
<span class="type">int</span> channelLength <span class="operator">=</span> ((m_buffer<span class="operator">-</span><span class="operator">></span>getDataLength()) <span class="operator">/</span> (m_buffer<span class="operator">-</span><span class="operator">></span>getNofChannels()<span class="operator">*</span>m_buffer<span class="operator">-</span><span class="operator">></span>getBytesPerSample()))<span class="operator">-</span><span class="number">2</span>;
|
|
|
|
<span class="type">int</span> samplesToWrite <span class="operator">=</span> bufferLength<span class="operator">/</span><span class="number">2</span>;
|
|
<span class="type">int</span> amount;
|
|
<span class="type">int</span> totalMixed <span class="operator">=</span> <span class="number">0</span>;
|
|
|
|
<span class="keyword">while</span> (samplesToWrite<span class="operator">></span><span class="number">0</span>) {
|
|
<span class="type">int</span> samplesLeft <span class="operator">=</span> channelLength <span class="operator">-</span> (m_fixedPos<span class="operator">></span><span class="operator">></span><span class="number">12</span>);
|
|
<span class="type">int</span> maxMixAmount <span class="operator">=</span> (<span class="type">int</span>)(((<span class="type">long</span> <span class="type">long</span> <span class="type">int</span>)(samplesLeft)<span class="operator"><</span><span class="operator"><</span><span class="number">12</span>) <span class="operator">/</span> m_fixedInc ); <span class="comment">// This is how much we can mix at least</span>
|
|
<span class="comment">//int maxMixAmount = (int)((float)samplesLeft / ((float)m_fixedInc/4096.0f));</span>
|
|
<span class="comment">//if (maxMixAmount<1) maxMixAmount = 1; // NOTE, THIS MIGHT CAUSE PROBLEMS. NEEDS CHECKING</span>
|
|
<span class="keyword">if</span> (maxMixAmount<span class="operator">></span>samplesToWrite) {
|
|
maxMixAmount<span class="operator">=</span>samplesToWrite;
|
|
}
|
|
|
|
<span class="keyword">if</span> (maxMixAmount <span class="operator">></span> <span class="number">0</span>) {
|
|
amount<span class="operator">=</span>mixBlock(target<span class="operator">+</span>totalMixed <span class="operator">*</span> <span class="number">2</span><span class="operator">,</span> maxMixAmount);
|
|
|
|
<span class="keyword">if</span> (amount <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>)
|
|
{
|
|
<span class="comment">// Error!</span>
|
|
<span class="keyword">break</span>;
|
|
}
|
|
|
|
totalMixed<span class="operator">+</span><span class="operator">=</span>amount;
|
|
} <span class="keyword">else</span> {
|
|
amount <span class="operator">=</span> <span class="number">0</span>;
|
|
m_fixedPos <span class="operator">=</span> channelLength<span class="operator"><</span><span class="operator"><</span><span class="number">12</span>;
|
|
}
|
|
|
|
<span class="comment">// sample is ended,.. check the looping variables and see what to do.</span>
|
|
<span class="keyword">if</span> ((m_fixedPos<span class="operator">></span><span class="operator">></span><span class="number">12</span>)<span class="operator">></span><span class="operator">=</span>channelLength) {
|
|
m_fixedPos <span class="operator">-</span><span class="operator">=</span> (channelLength<span class="operator"><</span><span class="operator"><</span><span class="number">12</span>);
|
|
<span class="keyword">if</span> (m_loopTimes<span class="operator">></span><span class="number">0</span>) m_loopTimes<span class="operator">-</span><span class="operator">-</span>;
|
|
<span class="keyword">if</span> (m_loopTimes<span class="operator">=</span><span class="operator">=</span><span class="number">0</span>) {
|
|
stop();
|
|
<span class="keyword">return</span> totalMixed;
|
|
}
|
|
}
|
|
|
|
samplesToWrite<span class="operator">-</span><span class="operator">=</span>amount;
|
|
<span class="keyword">if</span> (samplesToWrite<span class="operator"><</span><span class="number">1</span>) <span class="keyword">break</span>;
|
|
};
|
|
<span class="keyword">return</span> totalMixed<span class="operator">*</span><span class="number">2</span>;
|
|
};</pre>
|
|
</div>
|
|
<!-- @@@demos/mobile/quickhit/ga_src/GEAudioBuffer.cpp -->
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="ft">
|
|
<span></span>
|
|
</div>
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|
</div>
|
|
<div class="footer">
|
|
<p>
|
|
<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
|
|
Documentation contributions included herein are the copyrights of
|
|
their respective owners.</p>
|
|
<br />
|
|
<p>
|
|
The documentation provided herein is licensed under the terms of the
|
|
<a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation
|
|
License version 1.3</a> as published by the Free Software Foundation.</p>
|
|
<p>
|
|
Documentation sources may be obtained from <a href="http://www.qt-project.org">
|
|
www.qt-project.org</a>.</p>
|
|
<br />
|
|
<p>
|
|
Qt and respective logos are trademarks of The Qt Company Ltd
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|
in Finland and/or other countries worldwide. All other trademarks are property
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of their respective owners. <a title="Privacy Policy"
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href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
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