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<a href="../../_sources/functionlib/dsplib/mfcc.rst.txt" rel="nofollow"> 查看页面源码</a>
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<section id="mfcc">
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<h1>MFCC<a class="headerlink" href="#mfcc" title="Link to this heading"></a></h1>
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<p>计算梅尔频率倒谱系数（Mel-Frequency Cepstral Coefficients）。</p>
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<div class="math notranslate nohighlight">
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\[MFCC_i = f(Input_i)\]</div>
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<dl>
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<dt>输入：</dt><dd><ul class="simple">
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<li><p><strong>mfcc_params</strong> - MFCC 计算相关的配置参数，如采样率、梅尔滤波器数量等。</p></li>
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<li><p><strong>spec_params</strong> - 频谱计算参数，定义了FFT窗口大小、重叠长度等。</p></li>
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<li><p><strong>mfcc_workspace</strong> - 工作空间参数，包括计算所需的中间缓冲区。</p></li>
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<li><p><strong>spec_workspace</strong> - 频谱计算的工作空间，包括FFT的窗口、输入数据等。</p></li>
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<li><p><strong>core_mask</strong> (可选) - 核掩码（仅适用于多核版本）。</p></li>
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</ul>
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</dd>
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<dt>输出：</dt><dd><ul class="simple">
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<li><p><strong>output(mfcc_params中)</strong> - 计算结果地址，存储MFCC特征。</p></li>
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<li><p><strong>output_shape(mfcc_params中)</strong> - 输出数据的形状，描述MFCC特征的维度。</p></li>
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</ul>
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</dd>
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<dt><strong>结构体定义：</strong></dt><dd><div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span><span class="w"> </span><span class="k">typedef</span><span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="p">{</span>
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<span class="linenos"> 2</span><span class="w"> </span><span class="c1">// 输入/输出</span>
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<span class="linenos"> 3</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">input</span><span class="p">;</span><span class="w"> </span><span class="c1">// 输入数据地址</span>
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<span class="linenos"> 4</span><span class="w"> </span><span class="kt">int</span><span class="o">*</span><span class="w"> </span><span class="n">input_shape</span><span class="p">;</span><span class="w"> </span><span class="c1">// 输入数据形状</span>
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<span class="linenos"> 5</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">output</span><span class="p">;</span><span class="w"> </span><span class="c1">// 输出数据地址</span>
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<span class="linenos"> 6</span><span class="w"> </span><span class="kt">int</span><span class="o">*</span><span class="w"> </span><span class="n">output_shape</span><span class="p">;</span><span class="w"> </span><span class="c1">// 输出数据形状</span>
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<span class="linenos"> 7</span>
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<span class="linenos"> 8</span><span class="w"> </span><span class="c1">// 配置参数</span>
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<span class="linenos"> 9</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">sample_rate</span><span class="p">;</span><span class="w"> </span><span class="c1">// 采样率</span>
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<span class="linenos">10</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">n_mfcc</span><span class="p">;</span><span class="w"> </span><span class="c1">// MFCC系数数量</span>
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<span class="linenos">11</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">dct_type</span><span class="p">;</span><span class="w"> </span><span class="c1">// DCT变换类型</span>
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<span class="linenos">12</span><span class="w"> </span><span class="kt">bool</span><span class="w"> </span><span class="n">log_mels</span><span class="p">;</span><span class="w"> </span><span class="c1">// 是否对梅尔频谱取对数</span>
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<span class="linenos">13</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">f_min</span><span class="p">;</span><span class="w"> </span><span class="c1">// 最小频率</span>
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<span class="linenos">14</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">f_max</span><span class="p">;</span><span class="w"> </span><span class="c1">// 最大频率</span>
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<span class="linenos">15</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">n_mels</span><span class="p">;</span><span class="w"> </span><span class="c1">// 梅尔滤波器数量</span>
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<span class="linenos">16</span><span class="w"> </span><span class="n">NormType</span><span class="w"> </span><span class="n">norm</span><span class="p">;</span><span class="w"> </span><span class="c1">// 归一化类型</span>
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<span class="linenos">17</span><span class="w"> </span><span class="n">NormMode</span><span class="w"> </span><span class="n">norm_M</span><span class="p">;</span><span class="w"> </span><span class="c1">// 归一化模式</span>
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<span class="linenos">18</span><span class="w"> </span><span class="n">MelType</span><span class="w"> </span><span class="n">mel_scale</span><span class="p">;</span><span class="w"> </span><span class="c1">// 梅尔尺度类型</span>
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<span class="linenos">19</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="n">MfccParam</span><span class="p">;</span>
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<span class="linenos">20</span>
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<span class="linenos">21</span><span class="w"> </span><span class="k">typedef</span><span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="p">{</span>
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<span class="linenos">22</span><span class="w"> </span><span class="c1">// 输入</span>
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<span class="linenos">23</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">input</span><span class="p">;</span><span class="w"> </span><span class="c1">// 输入数据地址</span>
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<span class="linenos">24</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">input_len</span><span class="p">;</span><span class="w"> </span><span class="c1">// 输入数据长度</span>
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<span class="linenos">25</span>
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<span class="linenos">26</span><span class="w"> </span><span class="c1">// 输出</span>
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<span class="linenos">27</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">output</span><span class="p">;</span><span class="w"> </span><span class="c1">// 输出数据地址</span>
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<span class="linenos">28</span><span class="w"> </span><span class="kt">int</span><span class="o">*</span><span class="w"> </span><span class="n">output_shape</span><span class="p">;</span><span class="w"> </span><span class="c1">// 输出数据形状</span>
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<span class="linenos">29</span>
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<span class="linenos">30</span><span class="w"> </span><span class="c1">// 配置参数</span>
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<span class="linenos">31</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">pad</span><span class="p">;</span><span class="w"> </span><span class="c1">// 填充大小</span>
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<span class="linenos">32</span><span class="w"> </span><span class="n">WindowType</span><span class="w"> </span><span class="n">window_type</span><span class="p">;</span><span class="w"> </span><span class="c1">// 窗函数类型</span>
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<span class="linenos">33</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">n_fft</span><span class="p">;</span><span class="w"> </span><span class="c1">// FFT点数</span>
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<span class="linenos">34</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">hop_length</span><span class="p">;</span><span class="w"> </span><span class="c1">// 帧移长度</span>
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<span class="linenos">35</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">win_length</span><span class="p">;</span><span class="w"> </span><span class="c1">// 窗长度</span>
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<span class="linenos">36</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">power</span><span class="p">;</span><span class="w"> </span><span class="c1">// 功率值</span>
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||
<span class="linenos">37</span><span class="w"> </span><span class="kt">bool</span><span class="w"> </span><span class="n">normalized</span><span class="p">;</span><span class="w"> </span><span class="c1">// 是否归一化</span>
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<span class="linenos">38</span><span class="w"> </span><span class="kt">bool</span><span class="w"> </span><span class="n">center</span><span class="p">;</span><span class="w"> </span><span class="c1">// 是否中心化</span>
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||
<span class="linenos">39</span><span class="w"> </span><span class="n">BorderType</span><span class="w"> </span><span class="n">pad_mode</span><span class="p">;</span><span class="w"> </span><span class="c1">// 填充模式</span>
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||
<span class="linenos">40</span><span class="w"> </span><span class="kt">bool</span><span class="w"> </span><span class="n">onesided</span><span class="p">;</span><span class="w"> </span><span class="c1">// 是否单边频谱</span>
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<span class="linenos">41</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="n">SpectrogramParam</span><span class="p">;</span>
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<span class="linenos">42</span>
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<span class="linenos">43</span><span class="w"> </span><span class="k">typedef</span><span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="p">{</span>
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<span class="linenos">44</span><span class="w"> </span><span class="c1">// 滤波器组计算缓冲区</span>
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<span class="linenos">45</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">all_freqs</span><span class="p">;</span><span class="w"> </span><span class="c1">// 所有频率点</span>
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<span class="linenos">46</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">m_pts</span><span class="p">;</span><span class="w"> </span><span class="c1">// 梅尔频率点</span>
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<span class="linenos">47</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">f_pts</span><span class="p">;</span><span class="w"> </span><span class="c1">// 线性频率点</span>
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||
<span class="linenos">48</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">fb</span><span class="p">;</span><span class="w"> </span><span class="c1">// 滤波器组</span>
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<span class="linenos">49</span>
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<span class="linenos">50</span><span class="w"> </span><span class="c1">// 三角滤波器计算缓冲区</span>
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<span class="linenos">51</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">f_diff</span><span class="p">;</span><span class="w"> </span><span class="c1">// 频率差值</span>
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||
<span class="linenos">52</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">slopes</span><span class="p">;</span><span class="w"> </span><span class="c1">// 斜率</span>
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||
<span class="linenos">53</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">down_slopes</span><span class="p">;</span><span class="w"> </span><span class="c1">// 下降斜率</span>
|
||
<span class="linenos">54</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">up_slopes</span><span class="p">;</span><span class="w"> </span><span class="c1">// 上升斜率</span>
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<span class="linenos">55</span>
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||
<span class="linenos">56</span><span class="w"> </span><span class="c1">// DCT变换缓冲区</span>
|
||
<span class="linenos">57</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">dct_mat</span><span class="p">;</span><span class="w"> </span><span class="c1">// DCT矩阵</span>
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<span class="linenos">58</span>
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||
<span class="linenos">59</span><span class="w"> </span><span class="c1">// 中间结果缓冲区</span>
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||
<span class="linenos">60</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">spectrogram_output</span><span class="p">;</span><span class="w"> </span><span class="c1">// 频谱图输出</span>
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<span class="linenos">61</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">mel_spectrogram_output</span><span class="p">;</span><span class="w"> </span><span class="c1">// 梅尔频谱输出</span>
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<span class="linenos">62</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="n">MfccWorkspaceParam</span><span class="p">;</span>
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<span class="linenos">63</span>
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||
<span class="linenos">64</span><span class="w"> </span><span class="k">typedef</span><span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="linenos">65</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">fft_window</span><span class="p">;</span><span class="w"> </span><span class="c1">// FFT窗函数缓冲区</span>
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||
<span class="linenos">66</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">fft_window_later</span><span class="p">;</span><span class="w"> </span><span class="c1">// 后续FFT窗缓冲区</span>
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<span class="linenos">67</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">input_data_pad</span><span class="p">;</span><span class="w"> </span><span class="c1">// 填充后的输入数据</span>
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<span class="linenos">68</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">input_data</span><span class="p">;</span><span class="w"> </span><span class="c1">// 输入数据缓冲区</span>
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<span class="linenos">69</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">input_win</span><span class="p">;</span><span class="w"> </span><span class="c1">// 加窗输入数据</span>
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<span class="linenos">70</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">exp_complex</span><span class="p">;</span><span class="w"> </span><span class="c1">// 复数指数缓冲区</span>
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<span class="linenos">71</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">spec_f</span><span class="p">;</span><span class="w"> </span><span class="c1">// 频谱频率缓冲区</span>
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||
<span class="linenos">72</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">output_onsided</span><span class="p">;</span><span class="w"> </span><span class="c1">// 单边输出缓冲区</span>
|
||
<span class="linenos">73</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="n">WorkspaceParam</span><span class="p">;</span>
|
||
</pre></div>
|
||
</div>
|
||
</dd>
|
||
<dt>支持平台：</dt><dd><p><code class="docutils literal notranslate"><span class="pre">FT78NE</span></code>
|
||
<code class="docutils literal notranslate"><span class="pre">MT7004</span></code></p>
|
||
</dd>
|
||
</dl>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">备注</p>
|
||
<ul class="simple">
|
||
<li><p>FT78NE 支持 fp32</p></li>
|
||
<li><p>MT7004 支持 fp32, fp16</p></li>
|
||
</ul>
|
||
</div>
|
||
<p><strong>共享存储版本:</strong></p>
|
||
<dl class="c function">
|
||
<dt class="sig sig-object c" id="c.fp_mfcc_s">
|
||
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">fp_mfcc_s</span></span></span><span class="sig-paren">(</span><span class="k"><span class="pre">const</span></span><span class="w"> </span><span class="n"><span class="pre">MfccParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">mfcc_params</span></span>, <span class="n"><span class="pre">SpectrogramParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">spec_params</span></span>, <span class="n"><span class="pre">MfccWorkspaceParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">mfcc_workspace</span></span>, <span class="n"><span class="pre">WorkspaceParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">spec_workspace</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">core_mask</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.fp_mfcc_s" title="Link to this definition"></a><br /></dt>
|
||
<dd></dd></dl>
|
||
|
||
<dl class="c function">
|
||
<dt class="sig sig-object c" id="c.hp_mfcc_s">
|
||
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">hp_mfcc_s</span></span></span><span class="sig-paren">(</span><span class="k"><span class="pre">const</span></span><span class="w"> </span><span class="n"><span class="pre">MfccParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">mfcc_params</span></span>, <span class="n"><span class="pre">SpectrogramParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">spec_params</span></span>, <span class="n"><span class="pre">MfccWorkspaceParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">mfcc_workspace</span></span>, <span class="n"><span class="pre">WorkspaceParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">spec_workspace</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">core_mask</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.hp_mfcc_s" title="Link to this definition"></a><br /></dt>
|
||
<dd><p><strong>C调用示例：</strong></p>
|
||
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span><span class="c1">//FT78NE示例</span>
|
||
<span class="linenos"> 2</span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdio.h></span>
|
||
<span class="linenos"> 3</span>
|
||
<span class="linenos"> 4</span><span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">argc</span><span class="p">,</span><span class="w"> </span><span class="kt">char</span><span class="o">*</span><span class="w"> </span><span class="n">argv</span><span class="p">[])</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="linenos"> 5</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">input_data</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="o">*</span><span class="p">)</span><span class="mh">0x81000000</span><span class="p">;</span>
|
||
<span class="linenos"> 6</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">output_mfcc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="o">*</span><span class="p">)</span><span class="mh">0x82000000</span><span class="p">;</span>
|
||
<span class="linenos"> 7</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">input_shape</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="mi">4000</span><span class="p">};</span>
|
||
<span class="linenos"> 8</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">output_shape</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">};</span>
|
||
<span class="linenos"> 9</span><span class="w"> </span><span class="n">MfccParam</span><span class="o">*</span><span class="w"> </span><span class="n">mfcc_params</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">MfccParam</span><span class="o">*</span><span class="p">)</span><span class="mh">0x83100000</span><span class="p">;</span>
|
||
<span class="linenos">10</span><span class="w"> </span><span class="n">SpectrogramParam</span><span class="o">*</span><span class="w"> </span><span class="n">spec_params</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">SpectrogramParam</span><span class="o">*</span><span class="p">)</span><span class="mh">0x83200000</span><span class="p">;</span>
|
||
<span class="linenos">11</span><span class="w"> </span><span class="n">MfccWorkspaceParam</span><span class="o">*</span><span class="w"> </span><span class="n">mfcc_workspace</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">MfccWorkspaceParam</span><span class="o">*</span><span class="p">)</span><span class="mh">0x83300000</span><span class="p">;</span>
|
||
<span class="linenos">12</span><span class="w"> </span><span class="n">WorkspaceParam</span><span class="o">*</span><span class="w"> </span><span class="n">spec_workspace</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">WorkspaceParam</span><span class="o">*</span><span class="p">)</span><span class="mh">0x83400000</span><span class="p">;</span>
|
||
<span class="linenos">13</span>
|
||
<span class="linenos">14</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">input</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">input_data</span><span class="p">;</span>
|
||
<span class="linenos">15</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">input_shape</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">input_shape</span><span class="p">;</span>
|
||
<span class="linenos">16</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">output</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">output_mfcc</span><span class="p">;</span>
|
||
<span class="linenos">17</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">output_shape</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">output_shape</span><span class="p">;</span>
|
||
<span class="linenos">18</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">sample_rate</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">800</span><span class="p">;</span>
|
||
<span class="linenos">19</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">n_mfcc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">6</span><span class="p">;</span>
|
||
<span class="linenos">20</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">dct_type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="p">;</span>
|
||
<span class="linenos">21</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">log_mels</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">true</span><span class="p">;</span>
|
||
<span class="linenos">22</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">f_min</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">0.0f</span><span class="p">;</span>
|
||
<span class="linenos">23</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">f_max</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">400.0f</span><span class="p">;</span>
|
||
<span class="linenos">24</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">n_mels</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">8</span><span class="p">;</span>
|
||
<span class="linenos">25</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">norm</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">NORM_SLANEY</span><span class="p">;</span>
|
||
<span class="linenos">26</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">norm_M</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">NORM_MODE_ORTHO</span><span class="p">;</span>
|
||
<span class="linenos">27</span><span class="w"> </span><span class="n">mfcc_params</span><span class="o">-></span><span class="n">mel_scale</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">MEL_HTK</span><span class="p">;</span>
|
||
<span class="linenos">28</span>
|
||
<span class="linenos">29</span><span class="w"> </span><span class="c1">// 结构体 2: SpectrogramParam</span>
|
||
<span class="linenos">30</span><span class="w"> </span><span class="n">spec_params</span><span class="o">-></span><span class="n">pad</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
|
||
<span class="linenos">31</span><span class="w"> </span><span class="n">spec_params</span><span class="o">-></span><span class="n">window_type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">kHann</span><span class="p">;</span>
|
||
<span class="linenos">32</span><span class="w"> </span><span class="n">spec_params</span><span class="o">-></span><span class="n">n_fft</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">32</span><span class="p">;</span>
|
||
<span class="linenos">33</span><span class="w"> </span><span class="n">spec_params</span><span class="o">-></span><span class="n">hop_length</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">16</span><span class="p">;</span>
|
||
<span class="linenos">34</span><span class="w"> </span><span class="n">spec_params</span><span class="o">-></span><span class="n">win_length</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">32</span><span class="p">;</span>
|
||
<span class="linenos">35</span><span class="w"> </span><span class="n">spec_params</span><span class="o">-></span><span class="n">power</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">2.0f</span><span class="p">;</span>
|
||
<span class="linenos">36</span><span class="w"> </span><span class="n">spec_params</span><span class="o">-></span><span class="n">normalized</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
|
||
<span class="linenos">37</span><span class="w"> </span><span class="n">spec_params</span><span class="o">-></span><span class="n">center</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
|
||
<span class="linenos">38</span><span class="w"> </span><span class="n">spec_params</span><span class="o">-></span><span class="n">pad_mode</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">kConstant</span><span class="p">;</span>
|
||
<span class="linenos">39</span><span class="w"> </span><span class="n">spec_params</span><span class="o">-></span><span class="n">onesided</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">true</span><span class="p">;</span>
|
||
<span class="linenos">40</span>
|
||
<span class="linenos">41</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">core_mask</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mh">0xff</span><span class="p">;</span>
|
||
<span class="linenos">42</span><span class="w"> </span><span class="c1">//为mfcc_workspace和spec_workspace里每个中间缓冲区指针分配地址</span>
|
||
<span class="linenos">43</span><span class="w"> </span><span class="c1">//...</span>
|
||
<span class="linenos">44</span>
|
||
<span class="hll"><span class="linenos">45</span><span class="w"> </span><span class="n">fp_mfcc_s</span><span class="p">(</span><span class="n">mfcc_params</span><span class="p">,</span><span class="w"> </span><span class="n">spec_params</span><span class="p">,</span><span class="w"> </span><span class="n">mfcc_workspace</span><span class="p">,</span><span class="w"> </span><span class="n">spec_workspace</span><span class="p">,</span><span class="w"> </span><span class="n">core_mask</span><span class="p">);</span>
|
||
</span><span class="linenos">46</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
|
||
<span class="linenos">47</span><span class="p">}</span>
|
||
</pre></div>
|
||
</div>
|
||
</dd></dl>
|
||
|
||
<p><strong>私有存储版本:</strong></p>
|
||
<dl class="c function">
|
||
<dt class="sig sig-object c" id="c.fp_mfcc_p">
|
||
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">fp_mfcc_p</span></span></span><span class="sig-paren">(</span><span class="k"><span class="pre">const</span></span><span class="w"> </span><span class="n"><span class="pre">MfccParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">mfcc_params</span></span>, <span class="n"><span class="pre">SpectrogramParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">spec_params</span></span>, <span class="n"><span class="pre">MfccWorkspaceParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">mfcc_workspace</span></span>, <span class="n"><span class="pre">WorkspaceParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">spec_workspace</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.fp_mfcc_p" title="Link to this definition"></a><br /></dt>
|
||
<dd></dd></dl>
|
||
|
||
<dl class="c function">
|
||
<dt class="sig sig-object c" id="c.hp_mfcc_p">
|
||
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">hp_mfcc_p</span></span></span><span class="sig-paren">(</span><span class="k"><span class="pre">const</span></span><span class="w"> </span><span class="n"><span class="pre">MfccParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">mfcc_params</span></span>, <span class="n"><span class="pre">SpectrogramParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">spec_params</span></span>, <span class="n"><span class="pre">MfccWorkspaceParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">mfcc_workspace</span></span>, <span class="n"><span class="pre">WorkspaceParam</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">spec_workspace</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.hp_mfcc_p" title="Link to this definition"></a><br /></dt>
|
||
<dd><p><strong>C调用示例：</strong></p>
|
||
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span><span class="c1">//FT78NE示例</span>
|
||
<span class="linenos"> 2</span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdio.h></span>
|
||
<span class="linenos"> 3</span>
|
||
<span class="linenos"> 4</span><span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">argc</span><span class="p">,</span><span class="w"> </span><span class="kt">char</span><span class="o">*</span><span class="w"> </span><span class="n">argv</span><span class="p">[])</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="linenos"> 5</span><span class="w"> </span><span class="n">MfccParam</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">;</span>
|
||
<span class="linenos"> 6</span><span class="w"> </span><span class="n">SpectrogramParam</span><span class="w"> </span><span class="n">spec_params</span><span class="p">;</span>
|
||
<span class="linenos"> 7</span><span class="w"> </span><span class="n">MfccWorkspaceParam</span><span class="w"> </span><span class="n">mfcc_workspace</span><span class="p">;</span>
|
||
<span class="linenos"> 8</span><span class="w"> </span><span class="n">WorkspaceParam</span><span class="w"> </span><span class="n">spec_workspace</span><span class="p">;</span>
|
||
<span class="linenos"> 9</span>
|
||
<span class="linenos">10</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">input_data</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="o">*</span><span class="p">)</span><span class="mh">0x10810000</span><span class="p">;</span>
|
||
<span class="linenos">11</span><span class="w"> </span><span class="kt">float</span><span class="o">*</span><span class="w"> </span><span class="n">output_mfcc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="o">*</span><span class="p">)</span><span class="mh">0x10820000</span><span class="p">;</span>
|
||
<span class="linenos">12</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">input_shape</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="mi">4000</span><span class="p">};</span>
|
||
<span class="linenos">13</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">output_shape</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">};</span>
|
||
<span class="linenos">14</span>
|
||
<span class="linenos">15</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">input</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">input_data</span><span class="p">;</span>
|
||
<span class="linenos">16</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">input_shape</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">input_shape</span><span class="p">;</span>
|
||
<span class="linenos">17</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">output</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">output_mfcc</span><span class="p">;</span>
|
||
<span class="linenos">18</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">output_shape</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">output_shape</span><span class="p">;</span>
|
||
<span class="linenos">19</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">sample_rate</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">800</span><span class="p">;</span>
|
||
<span class="linenos">20</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">n_mfcc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">6</span><span class="p">;</span>
|
||
<span class="linenos">21</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">dct_type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="p">;</span>
|
||
<span class="linenos">22</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">log_mels</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">true</span><span class="p">;</span>
|
||
<span class="linenos">23</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">f_min</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">0.0f</span><span class="p">;</span>
|
||
<span class="linenos">24</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">f_max</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">400.0f</span><span class="p">;</span>
|
||
<span class="linenos">25</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">n_mels</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">8</span><span class="p">;</span>
|
||
<span class="linenos">26</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">norm</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">NORM_SLANEY</span><span class="p">;</span>
|
||
<span class="linenos">27</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">norm_M</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">NORM_MODE_ORTHO</span><span class="p">;</span>
|
||
<span class="linenos">28</span><span class="w"> </span><span class="n">mfcc_params</span><span class="p">.</span><span class="n">mel_scale</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">MEL_HTK</span><span class="p">;</span>
|
||
<span class="linenos">29</span>
|
||
<span class="linenos">30</span><span class="w"> </span><span class="c1">// 结构体 2: SpectrogramParam</span>
|
||
<span class="linenos">31</span><span class="w"> </span><span class="n">spec_params</span><span class="p">.</span><span class="n">pad</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
|
||
<span class="linenos">32</span><span class="w"> </span><span class="n">spec_params</span><span class="p">.</span><span class="n">window_type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">kHann</span><span class="p">;</span>
|
||
<span class="linenos">33</span><span class="w"> </span><span class="n">spec_params</span><span class="p">.</span><span class="n">n_fft</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">32</span><span class="p">;</span>
|
||
<span class="linenos">34</span><span class="w"> </span><span class="n">spec_params</span><span class="p">.</span><span class="n">hop_length</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">16</span><span class="p">;</span>
|
||
<span class="linenos">35</span><span class="w"> </span><span class="n">spec_params</span><span class="p">.</span><span class="n">win_length</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">32</span><span class="p">;</span>
|
||
<span class="linenos">36</span><span class="w"> </span><span class="n">spec_params</span><span class="p">.</span><span class="n">power</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">2.0f</span><span class="p">;</span>
|
||
<span class="linenos">37</span><span class="w"> </span><span class="n">spec_params</span><span class="p">.</span><span class="n">normalized</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
|
||
<span class="linenos">38</span><span class="w"> </span><span class="n">spec_params</span><span class="p">.</span><span class="n">center</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
|
||
<span class="linenos">39</span><span class="w"> </span><span class="n">spec_params</span><span class="p">.</span><span class="n">pad_mode</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">kConstant</span><span class="p">;</span>
|
||
<span class="linenos">40</span><span class="w"> </span><span class="n">spec_params</span><span class="p">.</span><span class="n">onesided</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">true</span><span class="p">;</span>
|
||
<span class="linenos">41</span>
|
||
<span class="linenos">42</span><span class="w"> </span><span class="c1">//为mfcc_workspace和spec_workspace里每个中间缓冲区指针分配地址</span>
|
||
<span class="linenos">43</span><span class="w"> </span><span class="c1">//...</span>
|
||
<span class="linenos">44</span>
|
||
<span class="hll"><span class="linenos">45</span><span class="w"> </span><span class="n">fp_mfcc_p</span><span class="p">(</span><span class="o">&</span><span class="n">mfcc_params</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">spec_params</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">mfcc_workspace</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">spec_workspace</span><span class="p">);</span>
|
||
</span><span class="linenos">46</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
|
||
<span class="linenos">47</span><span class="p">}</span>
|
||
</pre></div>
|
||
</div>
|
||
</dd></dl>
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