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<a class="el" href="dir_000002.html">src</a></div>
<h1>sample.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> Copyright (c) 2005, The Musepack Development Team</span>
<a name="l00003"></a>00003 <span class="comment"> All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Redistribution and use in source and binary forms, with or without</span>
<a name="l00006"></a>00006 <span class="comment"> modification, are permitted provided that the following conditions are</span>
<a name="l00007"></a>00007 <span class="comment"> met:</span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> * Redistributions of source code must retain the above copyright</span>
<a name="l00010"></a>00010 <span class="comment"> notice, this list of conditions and the following disclaimer.</span>
<a name="l00011"></a>00011 <span class="comment"></span>
<a name="l00012"></a>00012 <span class="comment"> * Redistributions in binary form must reproduce the above</span>
<a name="l00013"></a>00013 <span class="comment"> copyright notice, this list of conditions and the following</span>
<a name="l00014"></a>00014 <span class="comment"> disclaimer in the documentation and/or other materials provided</span>
<a name="l00015"></a>00015 <span class="comment"> with the distribution.</span>
<a name="l00016"></a>00016 <span class="comment"></span>
<a name="l00017"></a>00017 <span class="comment"> * Neither the name of the The Musepack Development Team nor the</span>
<a name="l00018"></a>00018 <span class="comment"> names of its contributors may be used to endorse or promote</span>
<a name="l00019"></a>00019 <span class="comment"> products derived from this software without specific prior</span>
<a name="l00020"></a>00020 <span class="comment"> written permission.</span>
<a name="l00021"></a>00021 <span class="comment"></span>
<a name="l00022"></a>00022 <span class="comment"> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span>
<a name="l00023"></a>00023 <span class="comment"> "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span>
<a name="l00024"></a>00024 <span class="comment"> LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span>
<a name="l00025"></a>00025 <span class="comment"> A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span>
<a name="l00026"></a>00026 <span class="comment"> OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00027"></a>00027 <span class="comment"> SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span>
<a name="l00028"></a>00028 <span class="comment"> LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,</span>
<a name="l00029"></a>00029 <span class="comment"> DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY</span>
<a name="l00030"></a>00030 <span class="comment"> THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00031"></a>00031 <span class="comment"> (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span>
<a name="l00032"></a>00032 <span class="comment"> OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00033"></a>00033 <span class="comment">*/</span>
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="preprocessor">#include <stdio.h></span>
<a name="l00036"></a>00036 <span class="preprocessor">#include <assert.h></span>
<a name="l00037"></a>00037 <span class="preprocessor">#include <time.h></span>
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="preprocessor">#include <<a class="code" href="mpcdec_8h.html">mpcdec/mpcdec.h</a>></span>
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="comment">/*</span>
<a name="l00042"></a>00042 <span class="comment"> The data bundle we pass around with our reader to store file</span>
<a name="l00043"></a>00043 <span class="comment"> position and size etc. </span>
<a name="l00044"></a>00044 <span class="comment">*/</span>
<a name="l00045"></a><a class="code" href="structreader__data__t.html">00045</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structreader__data__t.html">reader_data_t</a> {
<a name="l00046"></a><a class="code" href="structreader__data__t.html#o0">00046</a> FILE *<a class="code" href="structreader__data__t.html#o0">file</a>;
<a name="l00047"></a><a class="code" href="structreader__data__t.html#o1">00047</a> <span class="keywordtype">long</span> <a class="code" href="structreader__data__t.html#o1">size</a>;
<a name="l00048"></a><a class="code" href="structreader__data__t.html#o2">00048</a> mpc_bool_t <a class="code" href="structreader__data__t.html#o2">seekable</a>;
<a name="l00049"></a>00049 } <a class="code" href="structreader__data__t.html">reader_data</a>;
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="comment">/*</span>
<a name="l00052"></a>00052 <span class="comment"> Our implementations of the mpc_reader callback functions.</span>
<a name="l00053"></a>00053 <span class="comment">*/</span>
<a name="l00054"></a>00054 mpc_int32_t
<a name="l00055"></a>00055 read_impl(<span class="keywordtype">void</span> *data, <span class="keywordtype">void</span> *ptr, mpc_int32_t size)
<a name="l00056"></a>00056 {
<a name="l00057"></a>00057 <a class="code" href="structreader__data__t.html">reader_data</a> *d = (<a class="code" href="structreader__data__t.html">reader_data</a> *) data;
<a name="l00058"></a>00058 <span class="keywordflow">return</span> fread(ptr, 1, size, d-><a class="code" href="structreader__data__t.html#o0">file</a>);
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060
<a name="l00061"></a>00061 mpc_bool_t
<a name="l00062"></a>00062 seek_impl(<span class="keywordtype">void</span> *data, mpc_int32_t offset)
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064 <a class="code" href="structreader__data__t.html">reader_data</a> *d = (<a class="code" href="structreader__data__t.html">reader_data</a> *) data;
<a name="l00065"></a>00065 <span class="keywordflow">return</span> d-><a class="code" href="structreader__data__t.html#o2">seekable</a> ? !fseek(d-><a class="code" href="structreader__data__t.html#o0">file</a>, offset, SEEK_SET) : false;
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067
<a name="l00068"></a>00068 mpc_int32_t
<a name="l00069"></a>00069 tell_impl(<span class="keywordtype">void</span> *data)
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 <a class="code" href="structreader__data__t.html">reader_data</a> *d = (<a class="code" href="structreader__data__t.html">reader_data</a> *) data;
<a name="l00072"></a>00072 <span class="keywordflow">return</span> ftell(d-><a class="code" href="structreader__data__t.html#o0">file</a>);
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00075"></a>00075 mpc_int32_t
<a name="l00076"></a>00076 get_size_impl(<span class="keywordtype">void</span> *data)
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 <a class="code" href="structreader__data__t.html">reader_data</a> *d = (<a class="code" href="structreader__data__t.html">reader_data</a> *) data;
<a name="l00079"></a>00079 <span class="keywordflow">return</span> d-><a class="code" href="structreader__data__t.html#o1">size</a>;
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081
<a name="l00082"></a>00082 mpc_bool_t
<a name="l00083"></a>00083 canseek_impl(<span class="keywordtype">void</span> *data)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 <a class="code" href="structreader__data__t.html">reader_data</a> *d = (<a class="code" href="structreader__data__t.html">reader_data</a> *) data;
<a name="l00086"></a>00086 <span class="keywordflow">return</span> d-><a class="code" href="structreader__data__t.html#o2">seekable</a>;
<a name="l00087"></a>00087 }
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="preprocessor">#define WFX_SIZE (2+2+4+4+2+2)</span>
<a name="l00090"></a>00090 <span class="preprocessor"></span>
<a name="l00091"></a>00091 <span class="preprocessor">#ifdef MPC_FIXED_POINT</span>
<a name="l00092"></a>00092 <span class="preprocessor"></span><span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00093"></a>00093 shift_signed(<a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a> val, <span class="keywordtype">int</span> shift)
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095 <span class="keywordflow">if</span> (shift > 0)
<a name="l00096"></a>00096 val <<= shift;
<a name="l00097"></a>00097 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (shift < 0)
<a name="l00098"></a>00098 val >>= -shift;
<a name="l00099"></a>00099 <span class="keywordflow">return</span> (<span class="keywordtype">int</span>)val;
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101 <span class="preprocessor">#endif</span>
<a name="l00102"></a>00102 <span class="preprocessor"></span>
<a name="l00103"></a><a class="code" href="classWavWriter.html">00103</a> <span class="keyword">class </span><a class="code" href="classWavWriter.html">WavWriter</a> {
<a name="l00104"></a>00104 <span class="keyword">public</span>:
<a name="l00105"></a><a class="code" href="classWavWriter.html#a0">00105</a> <a class="code" href="classWavWriter.html#a0">WavWriter</a>(FILE * p_output, <span class="keywordtype">unsigned</span> p_nch, <span class="keywordtype">unsigned</span> p_bps,
<a name="l00106"></a>00106 <span class="keywordtype">unsigned</span> p_srate)
<a name="l00107"></a>00107 : m_file(p_output), m_nch(p_nch), m_bps(p_bps), m_srate(p_srate) {
<a name="l00108"></a>00108 assert(m_bps == 16 || m_bps == 24);
<a name="l00109"></a>00109
<a name="l00110"></a>00110 WriteRaw(<span class="stringliteral">"RIFF"</span>, 4);
<a name="l00111"></a>00111 WriteDword(0); <span class="comment">//fix this in destructor</span>
<a name="l00112"></a>00112
<a name="l00113"></a>00113 WriteRaw(<span class="stringliteral">"WAVE"</span>, 4);
<a name="l00114"></a>00114 WriteRaw(<span class="stringliteral">"fmt "</span>, 4);
<a name="l00115"></a>00115 WriteDword(WFX_SIZE);
<a name="l00116"></a>00116
<a name="l00117"></a>00117 WriteWord(1); <span class="comment">//WAVE_FORMAT_PCM</span>
<a name="l00118"></a>00118 WriteWord(m_nch);
<a name="l00119"></a>00119 WriteDword(m_srate);
<a name="l00120"></a>00120 WriteDword(m_srate * m_nch * (m_bps >> 3));
<a name="l00121"></a>00121 WriteWord(m_nch * (m_bps >> 3));
<a name="l00122"></a>00122 WriteWord(m_bps);
<a name="l00123"></a>00123 <span class="comment">/*</span>
<a name="l00124"></a>00124 <span class="comment"> WORD wFormatTag; </span>
<a name="l00125"></a>00125 <span class="comment"> WORD nChannels; </span>
<a name="l00126"></a>00126 <span class="comment"> DWORD nSamplesPerSec; </span>
<a name="l00127"></a>00127 <span class="comment"> DWORD nAvgBytesPerSec; </span>
<a name="l00128"></a>00128 <span class="comment"> WORD nBlockAlign; </span>
<a name="l00129"></a>00129 <span class="comment"> WORD wBitsPerSample; </span>
<a name="l00130"></a>00130 <span class="comment"> */</span>
<a name="l00131"></a>00131 WriteRaw(<span class="stringliteral">"data"</span>, 4);
<a name="l00132"></a>00132 WriteDword(0); <span class="comment">//fix this in destructor</span>
<a name="l00133"></a>00133
<a name="l00134"></a>00134 m_data_bytes_written = 0;
<a name="l00135"></a><a class="code" href="classWavWriter.html#a1">00135</a> } mpc_bool_t <a class="code" href="classWavWriter.html#a1">WriteSamples</a>(<span class="keyword">const</span> <a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a> * p_buffer, <span class="keywordtype">unsigned</span> p_size) {
<a name="l00136"></a>00136 <span class="keywordtype">unsigned</span> n;
<a name="l00137"></a>00137 <span class="keywordtype">int</span> clip_min = -1 << (m_bps - 1),
<a name="l00138"></a>00138 clip_max = (1 << (m_bps - 1)) - 1, float_scale = 1 << (m_bps - 1);
<a name="l00139"></a>00139 <span class="keywordflow">for</span> (n = 0; n < p_size; n++) {
<a name="l00140"></a>00140 <span class="keywordtype">int</span> val;
<a name="l00141"></a>00141 <span class="preprocessor">#ifdef MPC_FIXED_POINT</span>
<a name="l00142"></a>00142 <span class="preprocessor"></span> val =
<a name="l00143"></a>00143 shift_signed(p_buffer[n],
<a name="l00144"></a>00144 m_bps - MPC_FIXED_POINT_SCALE_SHIFT);
<a name="l00145"></a>00145 <span class="preprocessor">#else</span>
<a name="l00146"></a>00146 <span class="preprocessor"></span> val = (int)(p_buffer[n] * float_scale);
<a name="l00147"></a>00147 <span class="preprocessor">#endif</span>
<a name="l00148"></a>00148 <span class="preprocessor"></span> <span class="keywordflow">if</span> (val < clip_min)
<a name="l00149"></a>00149 val = clip_min;
<a name="l00150"></a>00150 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (val > clip_max)
<a name="l00151"></a>00151 val = clip_max;
<a name="l00152"></a>00152 <span class="keywordflow">if</span> (!WriteInt(val, m_bps))
<a name="l00153"></a>00153 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00154"></a>00154 }
<a name="l00155"></a>00155 m_data_bytes_written += p_size * (m_bps >> 3);
<a name="l00156"></a>00156 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00157"></a>00157 }
<a name="l00158"></a>00158
<a name="l00159"></a><a class="code" href="classWavWriter.html#a2">00159</a> <a class="code" href="classWavWriter.html#a2">~WavWriter</a>() {
<a name="l00160"></a>00160 <span class="keywordflow">if</span> (m_data_bytes_written & 1) {
<a name="l00161"></a>00161 <span class="keywordtype">char</span> blah = 0;
<a name="l00162"></a>00162 WriteRaw(&blah, 1);
<a name="l00163"></a>00163 m_data_bytes_written++;
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165 Seek(4);
<a name="l00166"></a>00166 WriteDword((<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>)(m_data_bytes_written + 4 + 8 + WFX_SIZE +
<a name="l00167"></a>00167 8));
<a name="l00168"></a>00168 Seek(8 + 4 + 8 + WFX_SIZE + 4);
<a name="l00169"></a>00169 WriteDword(m_data_bytes_written);
<a name="l00170"></a>00170 }
<a name="l00171"></a>00171
<a name="l00172"></a>00172 <span class="keyword">private</span>:
<a name="l00173"></a>00173
<a name="l00174"></a>00174 mpc_bool_t Seek(<span class="keywordtype">unsigned</span> p_offset) {
<a name="l00175"></a>00175 <span class="keywordflow">return</span> !fseek(m_file, p_offset, SEEK_SET);
<a name="l00176"></a>00176 }
<a name="l00177"></a>00177
<a name="l00178"></a>00178 mpc_bool_t WriteRaw(<span class="keyword">const</span> <span class="keywordtype">void</span> *p_buffer, <span class="keywordtype">unsigned</span> p_bytes) {
<a name="l00179"></a>00179 <span class="keywordflow">return</span> fwrite(p_buffer, 1, p_bytes, m_file) == p_bytes;
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181
<a name="l00182"></a>00182 mpc_bool_t WriteDword(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> p_val) {
<a name="l00183"></a>00183 <span class="keywordflow">return</span> WriteInt(p_val, 32);
<a name="l00184"></a>00184 }
<a name="l00185"></a>00185 mpc_bool_t WriteWord(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> p_val) {
<a name="l00186"></a>00186 <span class="keywordflow">return</span> WriteInt(p_val, 16);
<a name="l00187"></a>00187 }
<a name="l00188"></a>00188
<a name="l00189"></a>00189 <span class="comment">// write a little-endian number properly</span>
<a name="l00190"></a>00190 mpc_bool_t WriteInt(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> p_val, <span class="keywordtype">unsigned</span> p_width_bits) {
<a name="l00191"></a>00191 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> temp;
<a name="l00192"></a>00192 <span class="keywordtype">unsigned</span> shift = 0;
<a name="l00193"></a>00193 assert((p_width_bits % 8) == 0);
<a name="l00194"></a>00194 <span class="keywordflow">do</span> {
<a name="l00195"></a>00195 temp = (<span class="keywordtype">unsigned</span> char)((p_val >> shift) & 0xFF);
<a name="l00196"></a>00196 <span class="keywordflow">if</span> (!WriteRaw(&temp, 1))
<a name="l00197"></a>00197 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00198"></a>00198 shift += 8;
<a name="l00199"></a>00199 } <span class="keywordflow">while</span> (shift < p_width_bits);
<a name="l00200"></a>00200 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00201"></a>00201 }
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="keywordtype">unsigned</span> m_nch, m_bps, m_srate;
<a name="l00204"></a>00204 FILE *m_file;
<a name="l00205"></a>00205 <span class="keywordtype">unsigned</span> m_data_bytes_written;
<a name="l00206"></a>00206 };
<a name="l00207"></a>00207
<a name="l00208"></a>00208
<a name="l00209"></a>00209 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00210"></a>00210 usage(<span class="keyword">const</span> <span class="keywordtype">char</span> *exename)
<a name="l00211"></a>00211 {
<a name="l00212"></a>00212 printf
<a name="l00213"></a>00213 (<span class="stringliteral">"Usage: %s <infile.mpc> [<outfile.wav>]\nIf <outfile.wav> is not specified, decoder will run in benchmark mode.\n"</span>,
<a name="l00214"></a>00214 exename);
<a name="l00215"></a>00215 }
<a name="l00216"></a>00216
<a name="l00217"></a>00217 <span class="keywordtype">int</span>
<a name="l00218"></a>00218 main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)
<a name="l00219"></a>00219 {
<a name="l00220"></a>00220 <span class="keywordflow">if</span> (argc != 2 && argc != 3) {
<a name="l00221"></a>00221 <span class="keywordflow">if</span> (argc > 0)
<a name="l00222"></a>00222 usage(argv[0]);
<a name="l00223"></a>00223 <span class="keywordflow">return</span> 0;
<a name="l00224"></a>00224 }
<a name="l00225"></a>00225
<a name="l00226"></a>00226 FILE *input = fopen(argv[1], <span class="stringliteral">"rb"</span>);
<a name="l00227"></a>00227 FILE *output = 0;
<a name="l00228"></a>00228 <span class="keywordflow">if</span> (input == 0) {
<a name="l00229"></a>00229 usage(argv[0]);
<a name="l00230"></a>00230 printf(<span class="stringliteral">"Error opening input file: \"%s\"\n"</span>, argv[1]);
<a name="l00231"></a>00231 <span class="keywordflow">return</span> 1;
<a name="l00232"></a>00232 }
<a name="l00233"></a>00233
<a name="l00234"></a>00234 <span class="keywordflow">if</span> (argc == 3) {
<a name="l00235"></a>00235 output = fopen(argv[2], <span class="stringliteral">"wb"</span>);
<a name="l00236"></a>00236 <span class="keywordflow">if</span> (output == 0) {
<a name="l00237"></a>00237 fclose(input);
<a name="l00238"></a>00238 usage(argv[0]);
<a name="l00239"></a>00239 printf(<span class="stringliteral">"Error opening output file: \"%s\"\n"</span>, argv[2]);
<a name="l00240"></a>00240 <span class="keywordflow">return</span> 1;
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242 }
<a name="l00243"></a>00243
<a name="l00244"></a>00244 <span class="comment">/* initialize our reader_data tag the reader will carry around with it */</span>
<a name="l00245"></a>00245 <a class="code" href="structreader__data__t.html">reader_data</a> data;
<a name="l00246"></a>00246 data.<a class="code" href="structreader__data__t.html#o0">file</a> = input;
<a name="l00247"></a>00247 data.<a class="code" href="structreader__data__t.html#o2">seekable</a> = <span class="keyword">true</span>;
<a name="l00248"></a>00248 fseek(data.<a class="code" href="structreader__data__t.html#o0">file</a>, 0, SEEK_END);
<a name="l00249"></a>00249 data.<a class="code" href="structreader__data__t.html#o1">size</a> = ftell(data.<a class="code" href="structreader__data__t.html#o0">file</a>);
<a name="l00250"></a>00250 fseek(data.<a class="code" href="structreader__data__t.html#o0">file</a>, 0, SEEK_SET);
<a name="l00251"></a>00251
<a name="l00252"></a>00252 <span class="comment">/* set up an mpc_reader linked to our function implementations */</span>
<a name="l00253"></a>00253 <a class="code" href="structmpc__decoder__t.html">mpc_decoder</a> decoder;
<a name="l00254"></a>00254 <a class="code" href="structmpc__reader__t.html">mpc_reader</a> reader;
<a name="l00255"></a>00255 reader.<a class="code" href="structmpc__reader__t.html#o0">read</a> = read_impl;
<a name="l00256"></a>00256 reader.<a class="code" href="structmpc__reader__t.html#o1">seek</a> = seek_impl;
<a name="l00257"></a>00257 reader.<a class="code" href="structmpc__reader__t.html#o2">tell</a> = tell_impl;
<a name="l00258"></a>00258 reader.<a class="code" href="structmpc__reader__t.html#o3">get_size</a> = get_size_impl;
<a name="l00259"></a>00259 reader.<a class="code" href="structmpc__reader__t.html#o4">canseek</a> = canseek_impl;
<a name="l00260"></a>00260 reader.<a class="code" href="structmpc__reader__t.html#o5">data</a> = &data;
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="comment">/* read file's streaminfo data */</span>
<a name="l00263"></a>00263 <a class="code" href="structmpc__streaminfo.html">mpc_streaminfo</a> info;
<a name="l00264"></a>00264 <a class="code" href="mpcdec_8h.html#a9">mpc_streaminfo_init</a>(&info);
<a name="l00265"></a>00265 <span class="keywordflow">if</span> (<a class="code" href="mpcdec_8h.html#a10">mpc_streaminfo_read</a>(&info, &reader) != <a class="code" href="mpcdec_8h.html#a0">ERROR_CODE_OK</a>) {
<a name="l00266"></a>00266 printf(<span class="stringliteral">"Not a valid musepack file: \"%s\"\n"</span>, argv[1]);
<a name="l00267"></a>00267 <span class="keywordflow">return</span> 1;
<a name="l00268"></a>00268 }
<a name="l00269"></a>00269
<a name="l00270"></a>00270 <span class="comment">/* instantiate a decoder with our file reader */</span>
<a name="l00271"></a>00271 <a class="code" href="mpcdec_8h.html#a13">mpc_decoder_setup</a>(&decoder, &reader);
<a name="l00272"></a>00272 <span class="keywordflow">if</span> (!<a class="code" href="mpcdec_8h.html#a14">mpc_decoder_initialize</a>(&decoder, &info)) {
<a name="l00273"></a>00273 printf(<span class="stringliteral">"Error initializing decoder.\n"</span>, argv[1]);
<a name="l00274"></a>00274 <span class="keywordflow">return</span> 1;
<a name="l00275"></a>00275 }
<a name="l00276"></a>00276
<a name="l00277"></a>00277 <span class="comment">/* decode the file */</span>
<a name="l00278"></a>00278 printf(<span class="stringliteral">"Decoding from:\n%s\nTo:\n%s\n"</span>, argv[1],
<a name="l00279"></a>00279 output ? argv[2] : <span class="stringliteral">"N/A"</span>);
<a name="l00280"></a>00280 <a class="code" href="classWavWriter.html">WavWriter</a> *wavwriter =
<a name="l00281"></a>00281 output ? <span class="keyword">new</span> <a class="code" href="classWavWriter.html">WavWriter</a>(output, 2, 16, info.<a class="code" href="structmpc__streaminfo.html#z1_0">sample_freq</a>) : 0;
<a name="l00282"></a>00282 <a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a> sample_buffer[<a class="code" href="mpcdec_8h.html#a21a8">MPC_DECODER_BUFFER_LENGTH</a>];
<a name="l00283"></a>00283 clock_t begin, end;
<a name="l00284"></a>00284 begin = clock();
<a name="l00285"></a>00285 <span class="keywordtype">unsigned</span> total_samples = 0;
<a name="l00286"></a>00286 mpc_bool_t successful = FALSE;
<a name="l00287"></a>00287 <span class="keywordflow">for</span> (;;) {
<a name="l00288"></a>00288 <span class="keywordtype">unsigned</span> status = <a class="code" href="mpcdec_8h.html#a17">mpc_decoder_decode</a>(&decoder, sample_buffer, 0, 0);
<a name="l00289"></a>00289 <span class="keywordflow">if</span> (status == (<span class="keywordtype">unsigned</span>)(-1)) {
<a name="l00290"></a>00290 <span class="comment">//decode error</span>
<a name="l00291"></a>00291 printf(<span class="stringliteral">"Error decoding file.\n"</span>);
<a name="l00292"></a>00292 <span class="keywordflow">break</span>;
<a name="l00293"></a>00293 }
<a name="l00294"></a>00294 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (status == 0) <span class="comment">//EOF</span>
<a name="l00295"></a>00295 {
<a name="l00296"></a>00296 successful = <span class="keyword">true</span>;
<a name="l00297"></a>00297 <span class="keywordflow">break</span>;
<a name="l00298"></a>00298 }
<a name="l00299"></a>00299 <span class="keywordflow">else</span> <span class="comment">//status>0</span>
<a name="l00300"></a>00300 {
<a name="l00301"></a>00301 total_samples += status;
<a name="l00302"></a>00302 <span class="keywordflow">if</span> (wavwriter) {
<a name="l00303"></a>00303 <span class="keywordflow">if</span> (!wavwriter->
<a name="l00304"></a>00304 WriteSamples(sample_buffer, status * <span class="comment">/* stereo */</span> 2)) {
<a name="l00305"></a>00305 printf(<span class="stringliteral">"Write error.\n"</span>);
<a name="l00306"></a>00306 <span class="keywordflow">break</span>;
<a name="l00307"></a>00307 }
<a name="l00308"></a>00308 }
<a name="l00309"></a>00309 }
<a name="l00310"></a>00310 }
<a name="l00311"></a>00311
<a name="l00312"></a>00312 end = clock();
<a name="l00313"></a>00313
<a name="l00314"></a>00314 <span class="keywordflow">if</span> (wavwriter) {
<a name="l00315"></a>00315 <span class="keyword">delete</span> wavwriter;
<a name="l00316"></a>00316 }
<a name="l00317"></a>00317
<a name="l00318"></a>00318 <span class="keywordflow">if</span> (successful) {
<a name="l00319"></a>00319 printf(<span class="stringliteral">"\nFinished.\nTotal samples decoded: %u.\n"</span>, total_samples);
<a name="l00320"></a>00320 <span class="keywordtype">unsigned</span> ms = (end - begin) * 1000 / CLOCKS_PER_SEC;
<a name="l00321"></a>00321 <span class="keywordtype">unsigned</span> ratio =
<a name="l00322"></a>00322 (unsigned)((double)total_samples / (double)info.<a class="code" href="structmpc__streaminfo.html#z1_0">sample_freq</a> /
<a name="l00323"></a>00323 ((double)ms / 1000.0) * 100.0);
<a name="l00324"></a>00324 printf(<span class="stringliteral">"Time: %u ms (%u.%02ux).\n"</span>, ms, ratio / 100, ratio % 100);
<a name="l00325"></a>00325 }
<a name="l00326"></a>00326
<a name="l00327"></a>00327 <span class="keywordflow">return</span> 0;
<a name="l00328"></a>00328 }
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 23 16:35:24 2005 for libmpcdec by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.4 </small></address>
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