player_8c-source.html

MP3播放器源代码, VS1003B

00543     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00544       <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a14">PS_NEXT_SONG</a>; <span class="comment">/* Request */</span>
00545     }      
00546     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00547       <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a15">PS_PREVIOUS_SONG</a>; <span class="comment">/* Request */</span>
00548     }      
00549     <span class="keywordflow">break</span>;
00550 
00551 
00552   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a4">UI_VOLUME</a>:
00553     
00554     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00555       uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00556       <span class="keywordflow">if</span> (volume++ == 254) volume = 254; <span class="comment">//Change + limit to 254 (minimum vol)</span>
00557       <a class="code" href="vs10xx_8h.html#a33">Mp3SetVolume</a>(volume,volume);
00558     }
00559     
00560     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00561       uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00562       <span class="keywordflow">if</span> (volume-- == 0) volume = 0; <span class="comment">//Change + limit to 0 (maximum volume)</span>
00563       <a class="code" href="vs10xx_8h.html#a33">Mp3SetVolume</a>(volume,volume);
00564     }
00565     <span class="keywordflow">break</span>; <span class="comment">// UI_VOLUME</span>
00566 
00567   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a5">UI_BASS</a>:
00568   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a6">UI_TREBLE</a>: <span class="comment">//BASS and TREBLE use the same VS10xx register</span>
00569     bassUpdateNeeded = 0;
00570     
00571     <span class="comment">//First let's see if a key is pressed; does the user want to set level?</span>
00572 
00573     <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a>==<a class="code" href="ui_8h.html#a24a5">UI_BASS</a>){ <span class="comment">//BASS screen is active</span>
00574 
00575       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00576         bassUpdateNeeded = 1;
00577         <span class="keywordflow">if</span> (bass-- == 0) bass = 0; <span class="comment">//Change + limit to 0 (OFF setting)</span>
00578       }
00579       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00580         bassUpdateNeeded = 1;
00581         <span class="keywordflow">if</span> (bass++ == 127) bass = 127; <span class="comment">//Change + limit to 127 (max setting)</span>
00582       }
00583 
00584     }<span class="keywordflow">else</span>{ <span class="comment">//TREBLE screen is active</span>
00585       
00586       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00587         bassUpdateNeeded = 1; <span class="comment">//SCI_BASS is for both bass and treble</span>
00588         <span class="keywordflow">if</span> (treble-- == 0) treble = 0; <span class="comment">//Change + limit to 0 (OFF setting)</span>
00589       }
00590       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00591         bassUpdateNeeded = 1; <span class="comment">//SCI_BASS is for both bass and treble</span>
00592         <span class="keywordflow">if</span> (treble++ == 127) treble = 127; <span class="comment">//Change + limit to 127 (max)</span>
00593       }
00594       
00595     }
00596 
00597 
00598     <span class="keywordflow">if</span> (bassUpdateNeeded){
00599       <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> newBassRegister;
00600 
00601       <span class="comment">//User has pushed button to alter bass/treble register</span>
00602       <span class="comment">//calculate new value</span>
00603 
00619       <span class="comment">//Let's start from bass frequency setting.</span>
00620       <span class="comment">//min(0) should give 2 (20Hz), max(127) should give 15 (150Hz)</span>
00621       newBassRegister = (bass + 23) / 10; <span class="comment">//into bits 3..0, clear hibits</span>
00622       
00623       <span class="comment">//Bass boost level.</span>
00624       <span class="comment">//min(0) should give 0, max(127) should give 15</span>
00625       newBassRegister |= (bass&gt;&gt;3)&lt;&lt;4; <span class="comment">//insert to bits 7..4</span>
00626 
00627       <span class="comment">//Then the treble frequency</span>
00628       <span class="comment">//min(0) should give 15(15kHx), max(127) should give 2(2kHz)</span>
00629       newBassRegister |= (((148-treble)&gt;&gt;3)+2)&lt;&lt;8; <span class="comment">//insert into bits 11..8</span>
00630 
00631       <span class="comment">//Finally the treble value (-8..7)</span>
00632       <span class="comment">//min(0) should give -8, max(127) should give 7;</span>
00633       newBassRegister |= ((treble&gt;&gt;3)-8)&lt;&lt;12; <span class="comment">//insert into bits 15..12</span>
00634       
00635       
00636       uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00637 
00638       <span class="keywordflow">if</span> (<a class="code" href="vs10xx_8h.html#a38">Mp3ReadRegister</a>(<a class="code" href="vs10xx_8h.html#a4">SPI_BASS</a>)!=newBassRegister){
00639         <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(<a class="code" href="vs10xx_8h.html#a4">SPI_BASS</a>,newBassRegister&gt;&gt;8,newBassRegister&amp;0xff);
00640       }
00641 
00642       <span class="comment">//i = newBassRegister;</span>
00643       <span class="comment">//displayTitle[4] = lcd_hexchars[i&gt;&gt;12];</span>
00644       <span class="comment">//displayTitle[5] = lcd_hexchars[(i&gt;&gt;8)&amp;0x0f];</span>
00645       <span class="comment">//displayTitle[6] = lcd_hexchars[(i&gt;&gt;4)&amp;0x0f];</span>
00646       <span class="comment">//displayTitle[7] = lcd_hexchars[i&amp;0x0f];</span>
00647     
00648 
00649     }
00650 
00651     <span class="keywordflow">break</span>; <span class="comment">// UI_BASS and UI_TREBLE</span>
00652 
00653 
00654   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a8">UI_RECLEVEL</a>:
00655     
00656     <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>){
00657       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00658         uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00659         <span class="keywordflow">if</span> (reclevel++ == 100){
00660           reclevel = 100;
00661         }
00662         <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(<a class="code" href="vs10xx_8h.html#a15">SPI_AICTRL1</a>,
00663                          ((<span class="keywordtype">int</span>)reclevel*32)&gt;&gt;8,((<span class="keywordtype">int</span>)reclevel*32)&amp;0xff);
00664         <a class="code" href="board_8h.html#a44">SPIPutChar</a>(0);<a class="code" href="board_8h.html#a43">SPIWait</a>();
00665       }
00666       
00667       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00668         uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00669         <span class="keywordflow">if</span> (reclevel-- == 0){
00670           reclevel = 0;
00671         }
00672         <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(<a class="code" href="vs10xx_8h.html#a15">SPI_AICTRL1</a>,
00673                          ((<span class="keywordtype">int</span>)reclevel*32)&gt;&gt;8,((<span class="keywordtype">int</span>)reclevel*32)&amp;0xff);
00674         <a class="code" href="board_8h.html#a44">SPIPutChar</a>(0);<a class="code" href="board_8h.html#a43">SPIWait</a>();
00675       }
00676     }<span class="keywordflow">else</span>{
00677       <span class="comment">//Not in recording</span>
00678       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00679         <span class="comment">//Enter recording mode</span>
00680         <a class="code" href="player_8c.html#a3">playingState</a>=<a class="code" href="ui_8h.html#a25a23">PS_RECORDING</a>; <span class="comment">//request to record</span>
00681       }
00682     }
00683     <span class="keywordflow">break</span>; <span class="comment">// UI_RECLEVEL</span>
00684 
00685   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a10">UI_STOP</a>:
00686     
00687     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00688       <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a13">PS_END_OF_SONG</a>; <span class="comment">/* Request to abort playing */</span>
00689     }      
00690     <span class="keywordflow">break</span>; <span class="comment">// UI_STOP</span>
00691     
00692   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a7">UI_CUE</a>:
00693     
00694     <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a3">playingState</a> == <a class="code" href="ui_8h.html#a25a12">PS_NORMAL</a>){ <span class="comment">/* Only control when PS_NORMAL */</span>
00695       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00696         uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>; <span class="comment">/* Don't go back to title just yet */</span>
00697         <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a16">PS_CUE</a>; <span class="comment">/* Request */</span>
00698       }      
00699       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00700         uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00701         <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a19">PS_REWIND</a>; <span class="comment">/* Request */</span>
00702       }      
00703     }
00704 
00705     <span class="keywordflow">break</span>; <span class="comment">// UI_SKIP</span>
00706 
00707   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a11">UI_END_OF_MODES</a>:
00708     <a class="code" href="player_8c.html#a6">uiMode</a> = <a class="code" href="ui_8h.html#a24a2">UI_TITLE</a>;
00709     <span class="keywordflow">break</span>; <span class="comment">// UI_END_OF_MODES</span>
00710     
00711 
00712   } <span class="comment">//End Switch</span>
00713 
00714 
00715   <span class="comment">// Draw screen</span>
00716   <a class="code" href="display_8c.html#a7">UpdateDisplay</a>();
00717 }
00718   
00719 
00720 
<a name="l00724"></a><a class="code" href="player_8c.html#a13">00724</a> <span class="keywordtype">void</span> <a class="code" href="player_8c.html#a13">PlayCurrentFile</a>(){
00725   xdata <span class="keywordtype">char</span> c, nFragments;
00726 
00727   <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a12">PS_NORMAL</a>; <span class="comment">/* Request to play normally */</span>