player_8c.html

MP3播放器源代码, VS1003B

          <td class="md" nowrap valign="top"> void AvailableProcessorTime           </td>
          <td class="md" valign="top">(&nbsp;</td>
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          <td class="md" valign="top">&nbsp;)&nbsp;</td>
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<p>
This is called when there is free processor time, implement externally. 
<p>
The basic task of this function is to implement the player user interface. 
<p>
Local variables:<p>
<ul>
<li><b>volume</b>: Current volume setting</li></ul>
<p>
<ul>
<li><b>bass</b>: Current bass enhancer setting</li></ul>
<p>
<ul>
<li><b>treble</b>: Current treble enhancer setting</li></ul>
<p>
<ul>
<li><b>reclevel</b>: Current recording level setting</li></ul>
<p>
<ul>
<li><b>uiReturnDelay</b>: Counts down to returning to UI mode 0 (title screen)</li></ul>
<p>
Bass/Treble setting calculation<p>
There are 2 or 4 adjustments possible:<ul>
<li>Bass Frequency (1011B/E, 1002, 10x3) : 2..15 -&gt; 20..1500 Hz</li><li>Bass boost (1011B/E, 1002, 10x3) : 0..15 -&gt; 0ff..+15dB)</li><li>Treble Frequency (1011E, 10x3) : 0..15 -&gt; 0..15kHz</li><li>Treble level (1011E, 10x3) : -8..+7 -&gt; -12..+10.5dB</li></ul>
<p>
In this software, all are adjusted based from a single setting (0..128) for bass and another for treble. You may wish to allow user to control frequency and level separately or set fixed frequencies for a known speaker type. This algorithm increases the frequency range of adjustment with the increasing level. 
<p>
Definition at line <a class="el" href="player_8c-source.html#l00332">332</a> of file <a class="el" href="player_8c-source.html">player.c</a>.
<p>
References <a class="el" href="display_8c-source.html#l00014">displayStyle</a>, <a class="el" href="display_8c-source.html#l00011">displayTitle</a>, <a class="el" href="display_8c-source.html#l00015">displayValue</a>, <a class="el" href="display_8h-source.html#l00012">DS_NO_YES</a>, <a class="el" href="display_8h-source.html#l00011">DS_PERCENTAGE</a>, <a class="el" href="display_8h-source.html#l00014">DS_RAWTEXT</a>, <a class="el" href="display_8h-source.html#l00009">DS_TEXT</a>, <a class="el" href="board_8h-source.html#l00095">KEY_BUTTON</a>, <a class="el" href="board_8h-source.html#l00110">KEY_FARLEFT</a>, <a class="el" href="board_8h-source.html#l00098">KEY_FARRIGHT</a>, <a class="el" href="lcdfonts_8c-source.html#l00008">lcdFont_barchars</a>, <a class="el" href="lcdfonts_8c-source.html#l00025">lcdFont_vertical_barchars</a>, <a class="el" href="lcd_8c-source.html#l00056">LcdReset()</a>, <a class="el" href="lcd_8c-source.html#l00043">LcdSelectFont()</a>, <a class="el" href="vs10xx_8c-source.html#l00017">Mp3ReadRegister()</a>, <a class="el" href="vs10xx_8h-source.html#l00078">Mp3SetVolume</a>, <a class="el" href="vs10xx_8h-source.html#l00068">Mp3WriteRegister</a>, <a class="el" href="player_8c-source.html#l00226">playingState</a>, <a class="el" href="ui_8h.html#a25a16">PS_CUE</a>, <a class="el" href="ui_8h.html#a25a13">PS_END_OF_SONG</a>, <a class="el" href="ui_8h.html#a25a14">PS_NEXT_SONG</a>, <a class="el" href="ui_8h.html#a25a12">PS_NORMAL</a>, <a class="el" href="ui_8h.html#a25a15">PS_PREVIOUS_SONG</a>, <a class="el" href="ui_8h.html#a25a23">PS_RECORDING</a>, <a class="el" href="ui_8h.html#a25a19">PS_REWIND</a>, <a class="el" href="player_8c-source.html#l00290">ScreenSetPlayTime()</a>, <a class="el" href="vs10xx_8h-source.html#l00032">SPI_AICTRL1</a>, <a class="el" href="vs10xx_8h-source.html#l00021">SPI_BASS</a>, <a class="el" href="board_8h-source.html#l00235">SPIPutChar</a>, <a class="el" href="board_8h-source.html#l00232">SPIWait</a>, <a class="el" href="ui_8h.html#a24a5">UI_BASS</a>, <a class="el" href="ui_8h.html#a24a7">UI_CUE</a>, <a class="el" href="ui_8h.html#a24a11">UI_END_OF_MODES</a>, <a class="el" href="ui_8h.html#a24a9">UI_INFO</a>, <a class="el" href="ui_8h.html#a24a8">UI_RECLEVEL</a>, <a class="el" href="player_8c-source.html#l00223">UI_RETURN_DELAY</a>, <a class="el" href="ui_8h.html#a24a3">UI_SPEC</a>, <a class="el" href="ui_8h.html#a24a10">UI_STOP</a>, <a class="el" href="ui_8h.html#a24a2">UI_TITLE</a>, <a class="el" href="ui_8h.html#a24a6">UI_TREBLE</a>, <a class="el" href="ui_8h.html#a24a4">UI_VOLUME</a>, <a class="el" href="player_8c-source.html#l00236">uiMode</a>, <a class="el" href="display_8c-source.html#l00058">UpdateDisplay()</a>, and <a class="el" href="player_8c-source.html#l00233">userInterfaceDelayElapsed</a>.
<p>
Referenced by <a class="el" href="aviplay_8c-source.html#l00015">GetAVIBlock()</a>, <a class="el" href="vs10xx_8c-source.html#l00202">PlayDiskSectors()</a>, and <a class="el" href="record_8c-source.html#l00101">Record()</a>.
<p>
<pre class="fragment"><div>00332                              {
00333 
00337   <span class="keyword">static</span> xdata <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> volume = 20;
00338 
00340   <span class="keyword">static</span> xdata <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> bass = 0;
00341 
00343   <span class="keyword">static</span> xdata <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> treble = 64; <span class="comment">//middle setting = 0</span>
00344 
00346   <span class="keyword">static</span> xdata <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> reclevel = 50;
00347 
00348   <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i; <span class="comment">//temp variable</span>
00349 
00350   <span class="keyword">static</span> bit bassUpdateNeeded;
00351 
00355   <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> uiReturnDelay=0;
00356 
00357 
00358 <span class="preprocessor">#if 0</span>
00359 <span class="preprocessor"></span>  <span class="comment">// Simple serial control demo: receiving 'N' advances to next song</span>
00360   <span class="comment">// and 'P' to previous song</span>
00361 
00362   <span class="keywordflow">if</span> (RI) { <span class="comment">//Serial Data Received</span>
00363     RI = 0; <span class="comment">//Clear received flag!!!</span>
00364 
00365     i = SBUF; <span class="comment">// read received character from uart buffer to temp i</span>
00366 
00367     <span class="keywordflow">if</span> (i==<span class="charliteral">'N'</span>){
00368       <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a14">PS_NEXT_SONG</a>;
00369     }
00370     <span class="keywordflow">if</span> (i==<span class="charliteral">'P'</span>){
00371       <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a15">PS_PREVIOUS_SONG</a>;
00372     }
00373   }
00374 <span class="preprocessor">#endif</span>
00375 <span class="preprocessor"></span>
00376 
00377 
00378 
00379   <span class="keywordflow">if</span> (!<a class="code" href="player_8c.html#a5">userInterfaceDelayElapsed</a>){
00380     <span class="keywordflow">return</span>; <span class="comment">/* Not yet time to do user interface stuff */</span>
00381   }
00382   
00383   <a class="code" href="player_8c.html#a5">userInterfaceDelayElapsed</a> = 0;
00384 
00385 
00386   <span class="comment">// User Interface Modes</span>
00387   <span class="comment">// Return to UI_TITLE after long period of button inactivity</span>
00388 
00389   <span class="keywordflow">if</span> (uiReturnDelay == 0){
00390     <span class="keywordflow">if</span> ((<a class="code" href="player_8c.html#a6">uiMode</a> != <a class="code" href="ui_8h.html#a24a3">UI_SPEC</a>)&amp;&amp;(<a class="code" href="player_8c.html#a6">uiMode</a> != <a class="code" href="ui_8h.html#a24a7">UI_CUE</a>))
00391       <a class="code" href="player_8c.html#a6">uiMode</a> = <a class="code" href="ui_8h.html#a24a2">UI_TITLE</a>;
00392     <span class="keywordflow">else</span>{
00393     }
00394   }<span class="keywordflow">else</span>{
00395     uiReturnDelay--;
00396   }
00397 
00398   
00399 
00400 <span class="preprocessor">#ifndef VS1003</span>
00401 <span class="preprocessor"></span>  <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a>==<a class="code" href="ui_8h.html#a24a3">UI_SPEC</a>) <span class="comment">//Only VS1003 has spectrum analyzer</span>
00402     <a class="code" href="player_8c.html#a6">uiMode</a>++;
00403   <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a>==<a class="code" href="ui_8h.html#a24a8">UI_RECLEVEL</a>) <span class="comment">//Only record in VS1003 chips</span>
00404     <a class="code" href="player_8c.html#a6">uiMode</a>++;
00405 <span class="preprocessor">#endif</span>
00406 <span class="preprocessor"></span>
00407 
00408 
00409 
00410   <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a>==<a class="code" href="ui_8h.html#a24a9">UI_INFO</a>)
00411     <a class="code" href="player_8c.html#a6">uiMode</a>++; <span class="comment">//Nothing interesting currently in screen UI_INFO.</span>
00412   <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a>==<a class="code" href="ui_8h.html#a24a10">UI_STOP</a>)
00413     <a class="code" href="player_8c.html#a6">uiMode</a>++; <span class="comment">//Nothing interesting currently in screen UI_STOP.</span>
00414 
00415   <span class="comment">/* Screen updates */</span>
00416   <span class="keywordflow">switch</span>(<a class="code" href="player_8c.html#a6">uiMode</a>){
00417     
00418   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a2">UI_TITLE</a>:  <span class="comment">//Playing time, song title</span>
00419 
00420     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a1">DS_TEXT</a>;
00421     <a class="code" href="player_8c.html#a11">ScreenSetPlayTime</a>();
00422     
00423     <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a3">playingState</a>==<a class="code" href="ui_8h.html#a25a23">PS_RECORDING</a>){      
00424       <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a3">DS_PERCENTAGE</a>;
00425     }     
00426     
00427     <span class="keywordflow">break</span>;
00428     
00429   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a10">UI_STOP</a>: <span class="comment">//Ask if the user wants to stop</span>
00430     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a4">DS_NO_YES</a>;
00431     strcpy (displayTitle, <span class="stringliteral">"Stop?   "</span>);
00432     <span class="keywordflow">break</span>;
00433 
00434   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a7">UI_CUE</a>: <span class="comment">//Ask if the user wants to fast forward or rewind</span>
00435     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a6">DS_RAWTEXT</a>;
00436     strcpy (displayTitle, <span class="stringliteral">"REW/CUE  &lt;-   -&gt;"</span>);
00437 
00438     <span class="comment">//i = Mp3ReadRegister(SPI_HDAT1);</span>
00439     <span class="comment">//displayTitle[5] = lcd_hexchars[i&gt;&gt;12];</span>
00440     <span class="comment">//displayTitle[6] = lcd_hexchars[(i&gt;&gt;8)&amp;0x0f];</span>
00441     <span class="comment">//displayTitle[7] = lcd_hexchars[(i&gt;&gt;4)&amp;0x0f];</span>
00442     <span class="comment">//displayTitle[8] = lcd_hexchars[i&amp;0x0f];</span>
00443 
00444     <span class="keywordflow">break</span>;
00445     
00446   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a4">UI_VOLUME</a>: <span class="comment">//Show volume bar</span>
00447     <a class="code" href="lcd_8h.html#a5">LcdSelectFont</a>(lcdFont_barchars);
00448     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a3">DS_PERCENTAGE</a>;
00449     strcpy(displayTitle,<span class="stringliteral">"Volume: "</span>);
00450     <a class="code" href="display_8c.html#a5">displayValue</a> = (100-(volume&gt;&gt;1));
00451     <span class="keywordflow">if</span> (<a class="code" href="display_8c.html#a5">displayValue</a>&lt;0) <a class="code" href="display_8c.html#a5">displayValue</a> = 0;
00452     <span class="keywordflow">break</span>;
00453 
00454   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a5">UI_BASS</a>: <span class="comment">//Show bass bar</span>
00455     <a class="code" href="lcd_8h.html#a5">LcdSelectFont</a>(lcdFont_barchars);
00456     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a3">DS_PERCENTAGE</a>;
00457     strcpy(displayTitle,<span class="stringliteral">"Bass:   "</span>);
00458     <a class="code" href="display_8c.html#a5">displayValue</a> = (bass/5)*4;
00459     <span class="keywordflow">if</span> (<a class="code" href="display_8c.html#a5">displayValue</a>&lt;1) <a class="code" href="display_8c.html#a5">displayValue</a> = 1;
00460     <span class="keywordflow">break</span>;
00461 
00462   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a6">UI_TREBLE</a>: <span class="comment">//Show treble bar</span>
00463     <a class="code" href="lcd_8h.html#a5">LcdSelectFont</a>(lcdFont_barchars);
00464     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a3">DS_PERCENTAGE</a>;
00465     strcpy(displayTitle,<span class="stringliteral">"Treble: "</span>);
00466     <a class="code" href="display_8c.html#a5">displayValue</a> = (treble/5)*4;
00467     <span class="keywordflow">if</span> (<a class="code" href="display_8c.html#a5">displayValue</a>&lt;1) <a class="code" href="display_8c.html#a5">displayValue</a> = 1;
00468     <span class="keywordflow">break</span>;
00469 
00470   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a8">UI_RECLEVEL</a>: <span class="comment">//Show recording level</span>
00471 
00472     <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a3">playingState</a>==<a class="code" href="ui_8h.html#a25a23">PS_RECORDING</a>){
00473       <a class="code" href="lcd_8h.html#a5">LcdSelectFont</a>(lcdFont_barchars);
00474       <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a3">DS_PERCENTAGE</a>;
00475       strcpy(displayTitle,<span class="stringliteral">"RecLevel"</span>);
00476       <a class="code" href="display_8c.html#a5">displayValue</a> = (reclevel);
00477       <span class="keywordflow">if</span> (reclevel==0){
00478         strcpy(displayTitle,<span class="stringliteral">"RecLevel &lt;Auto&gt; "</span>);
00479         <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a6">DS_RAWTEXT</a>; <span class="comment">//Reveal the "auto" text</span>
00480       }
00481     }<span class="keywordflow">else</span>{