record_8c.html

MP3播放器源代码, VS1003B

00139 
00140   <span class="comment">// Locate free space</span>
00151 <span class="comment"></span>  <a class="code" href="filesys_8c.html#a10">freeSector</a> = 0;
00152   <a class="code" href="filesys_8c.html#a17">ScanForFreeSector</a>();
00153   <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a> = <a class="code" href="filesys_8c.html#a10">freeSector</a>;
00154   <a class="code" href="filesys_8c.html#a6">fragment</a>[0].<a class="code" href="structfragmentEntry.html#o0">start</a> = <a class="code" href="filesys_8c.html#a10">freeSector</a>;
00155 
00156 
00164   <span class="keywordflow">for</span> (<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o0">c</a>=0; <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o0">c</a>&lt;56; <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o0">c</a>++){ <span class="comment">//temp is unsafe global temp variable.</span>
00165     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o0">c</a>] = <a class="code" href="record_8c.html#a1">RIFFHeader0</a>[<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o0">c</a>];
00166   }
00167   <span class="keywordflow">for</span> (<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</a>=52; <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</a>&lt;504; <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</a>++){
00168     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</a>] = 0;
00169   }
00170   <span class="keywordflow">for</span> (<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</a>=504; <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</a>&lt;512; <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</a>++){
00171     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</a>] = <a class="code" href="record_8c.html#a2">RIFFHeader504</a>[<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o1">i</a>-504];
00172   }
00173 
00180   lastSector = <a class="code" href="filesys_8c.html#a10">freeSector</a>;
00181   <a class="code" href="storage_8h.html#a4">WriteDiskSector</a>(freeSector);
00182   
00183   <span class="comment">/* Get a new free sector */</span>
00184   <a class="code" href="filesys_8c.html#a17">ScanForFreeSector</a>();
00185   <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a> = <a class="code" href="filesys_8c.html#a10">freeSector</a>;
00186   <a class="code" href="buffer_8c.html#a1">dataBufPtr</a> = <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>;
00187   
00188   <a class="code" href="board_8h.html#a51">Delay</a>(10);
00189   <span class="comment">//Sync to incoming audio frame...</span>
00190   <span class="keywordflow">while</span> (<a class="code" href="vs10xx_8h.html#a38">Mp3ReadRegister</a>(SPI_HDAT1)&gt;&gt;8) <span class="comment">//lots of data in buffer</span>
00191     ; <span class="comment">//Wait until buffer level restarts from 0</span>
00192   
00193   <a class="code" href="buffer_8c.html#a1">dataBufPtr</a> = <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>; <span class="comment">//reset dataBufPtr to start of filebuffer</span>
00194   blockNumber = 0;
00195 
00196   ConsoleWrite(<span class="stringliteral">"\rRecording, push button to stop..."</span>);
00197   <span class="keywordflow">while</span>((!<a class="code" href="board_8h.html#a14">KEY_BUTTON</a> 
00198         || (blockNumber!=0)
00199         || ((sectorCount)%(<a class="code" href="filesys_8c.html#a5">fatSectorsPerCluster</a>)!=0))
00200         &amp;&amp; (!stopRecording)){  
00201      
00202     <a class="code" href="board_8h.html#a11">GREEN_LED</a> = <a class="code" href="board_8h.html#a12">LED_ON</a>;
00203 
00204     <span class="comment">//Check for data</span>
00205     <span class="keywordflow">if</span> (<a class="code" href="vs10xx_8h.html#a38">Mp3ReadRegister</a>(SPI_HDAT1) &gt;= 128){ 
00206       <span class="comment">//there is a data block to be read...</span>
00207       <a class="code" href="board_8h.html#a11">GREEN_LED</a> = <a class="code" href="board_8h.html#a13">LED_OFF</a>;
00208       blockNumber++;
00209 
00210       <span class="comment">//dataBufPtr should point inside disk buffer, this should never fail:</span>
00211       <span class="keywordflow">if</span> (<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>&gt;(<a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>+511)){
00212         ConsoleWrite(<span class="stringliteral">"\rBuffer indexing error. Stop.\r"</span>);
00213         <span class="keywordflow">while</span>(1); <span class="comment">//stop</span>
00214       }
00215       
00216       <span class="comment">//Get the data</span>
00217       <span class="keywordflow">for</span> (<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o0">c</a>=0;<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o0">c</a>&lt;128;<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o0">c</a>++){
00218         data <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;
00219         i = <a class="code" href="vs10xx_8h.html#a38">Mp3ReadRegister</a>(SPI_HDAT0);         
00220         *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++ = (i&gt;&gt;8);
00221         *<a class="code" href="buffer_8c.html#a1">dataBufPtr</a>++ = (i&amp;0xff);
00222       }
00223       
00224       
00225       { <span class="comment">//Do basic SOUND LEVEL BAR calculation based on the 1 linear</span>
00226         <span class="comment">//sample in block[0] and [1]</span>
00227         <span class="keywordtype">signed</span> <span class="keywordtype">int</span> soundlevel;
00228         <span class="comment">// the user interface (level bar) calculation</span>
00229         <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a> == <a class="code" href="ui_8h.html#a24a2">UI_TITLE</a>){
00230           soundlevel = (<span class="keywordtype">signed</span> <span class="keywordtype">char</span>)<a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[1]&lt;&lt;7;
00231           soundlevel |= <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[0]&gt;&gt;1;
00232           <span class="keywordflow">if</span> (soundlevel&lt;0) soundlevel = -soundlevel;
00233           <a class="code" href="display_8c.html#a5">displayValue</a>=0;
00234           <span class="keywordflow">while</span> (soundlevel&gt;31){
00235             <a class="code" href="display_8c.html#a5">displayValue</a>++;         
00236             soundlevel&gt;&gt;=1;
00237           }
00238           <span class="keywordflow">if</span> (soundlevel&gt;19) <a class="code" href="display_8c.html#a5">displayValue</a>++;
00239           <span class="keywordflow">if</span> (soundlevel&gt;12) <a class="code" href="display_8c.html#a5">displayValue</a>++;
00240           <span class="keywordflow">if</span> (soundlevel&gt;6) <a class="code" href="display_8c.html#a5">displayValue</a>++;
00241           <a class="code" href="display_8c.html#a5">displayValue</a>-=3;
00242           <a class="code" href="display_8c.html#a5">displayValue</a>*=13;
00243           <span class="keywordflow">if</span> (oldlevel&gt;<a class="code" href="display_8c.html#a5">displayValue</a>){
00244             <a class="code" href="display_8c.html#a5">displayValue</a>=oldlevel-3;
00245           }
00246           oldlevel=<a class="code" href="display_8c.html#a5">displayValue</a>;       
00247         }     
00248         <a class="code" href="player_8c.html#a12">AvailableProcessorTime</a>();
00249         
00250       }<span class="comment">//SOUND LEVEL BAR calculation</span>
00251       
00252     }<span class="comment">//if there was data to read</span>
00253     
00254     
00255     <span class="comment">//Release SCI chip select, we might want to use MMC card</span>
00256     <a class="code" href="board_8h.html#a5">Mp3DeselectControl</a>();
00257     
00258     <span class="keywordflow">if</span> (blockNumber==2){ <span class="comment">//2 blocks (512 bytes) received, write to disk...</span>
00259       
00260       <span class="comment">//If we update the SPI_DECODE_TIME, it will show on player screen :)</span>
00261       <span class="comment">//we can do it, no problem. Here is the calculation for 16khz;</span>
00262       <span class="comment">//for 16kHz sample rate, 505 samples/block, 8 disk sectors are</span>
00263       <span class="comment">//exactly 505 milliseconds. </span>
00264       <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o2">l</a> = (sectorCount/8) * 505;
00265       <a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o2">l</a> /= 1000;
00266       <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(SPI_DECODE_TIME,<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o7">b</a>.b1,<a class="code" href="board_8c.html#a0">temp</a>.<a class="code" href="unionTemp.html#o7">b</a>.b0);
00267       <a class="code" href="board_8h.html#a5">Mp3DeselectControl</a>();
00268 
00269       blockNumber = 0;
00270       sectorCount++;
00271       <a class="code" href="storage_8h.html#a4">WriteDiskSector</a>(<a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a>);
00272       lastSector = <a class="code" href="filesys_8c.html#a10">freeSector</a>;
00273       <a class="code" href="filesys_8c.html#a17">ScanForFreeSector</a>(); <span class="comment">//this would be the proper way to go...</span>
00274       <a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a> = <a class="code" href="filesys_8c.html#a10">freeSector</a>; <span class="comment">//keep all variables in proper values</span>
00275       <a class="code" href="buffer_8c.html#a1">dataBufPtr</a> = <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>; <span class="comment">//reset data buffer pointer</span>
00276       <span class="keywordflow">if</span> (<a class="code" href="filesys_8c.html#a10">freeSector</a>!=(lastSector+1)){ <span class="comment">//end of continuous space, must break!</span>
00277         stopRecording = 1;
00278         ConsoleWrite(<span class="stringliteral">"\nFragment end - can't continue recording!\n"</span>);
00279         <a class="code" href="display_8h.html#a14">InitDisplay</a>(DS_STATIC,<span class="stringliteral">"FRAGMENT"</span>,<span class="stringliteral">" LIMIT!!"</span>,0);
00280         continueRecording = 1;
00281       }
00282     }
00283     
00284     <a class="code" href="display_8c.html#a5">displayValue</a> = 0;
00285     
00286   }<span class="comment">//while not button - stop recording when BUTTON is pressed</span>
00287   <a class="code" href="filesys_8c.html#a6">fragment</a>[0].<a class="code" href="structfragmentEntry.html#o1">length</a> = sectorCount;
00288   
00289 
00290   <span class="comment">//Enter size information to RIFF header..</span>
00291   {
00292     xdata <a class="code" href="unionAddress.html">addressType</a> size;
00293 
00294     <a class="code" href="storage_8h.html#a2">ReadDiskSector</a>(fragment[0].start);
00295     
00296     <span class="comment">//Patch in number of samples</span>
00297     size.l = (sectorCount-1)*1010;
00298     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[48] = size.b.b0;
00299     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[49] = size.b.b1;
00300     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[50] = size.b.b2;
00301     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[51] = size.b.b3;
00302 
00303     <span class="comment">//Patch in size of RIFF chunk...</span>
00304     size.l = (sectorCount*512)-8;
00305     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[4] = size.b.b0;
00306     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[5] = size.b.b1;
00307     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[6] = size.b.b2;
00308     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[7] = size.b.b3;
00309 
00310     <span class="comment">//Patch in size of DATA chunk...</span>
00311     size.l = (sectorCount*512)-512;
00312     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[508] = size.b.b0;
00313     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[509] = size.b.b1;
00314     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[510] = size.b.b2;
00315     <a class="code" href="buffer_8c.html#a0">diskSect</a>.<a class="code" href="unionDiskBlock.html#o1">raw</a>.<a class="code" href="structDiskBlock_1_1Raw.html#o0">buf</a>[511] = size.b.b3;
00316 
00317     <a class="code" href="storage_8h.html#a4">WriteDiskSector</a>(<a class="code" href="buffer_8c.html#a2">sectorAddress</a>.<a class="code" href="unionAddress.html#o0">l</a>);
00318   }
00319 
00320   ConsoleWrite(<span class="stringliteral">"Registering... FStart:"</span>);
00321   ConsolePutUInt(fragment[0].start);
00322   ConsoleWrite(<span class="stringliteral">"Registering... Size:"</span>);
00323   ConsolePutUInt(fragment[0].length);