Diff: wave_player.cpp

Revision:

2:69c7fc62c0ef

Parent:

0:62c18ade9a60

--- a/wave_player.cpp	Tue Jan 18 03:57:27 2011 +0000
+++ b/wave_player.cpp	Tue Dec 02 15:19:55 2014 +0000
@@ -44,7 +44,7 @@
 // SDcard filesystem can be hotrodded by increasing the SPI frequency it uses
 // internally.
 //-----------------------------------------------------------------------------
-void wave_player::play(FILE *wavefile)
+void wave_player::play(FILE *wavefile, volatile bool *play_ptr /*, volatile int *volume_ptr //JJH*/)
 {
         unsigned chunk_id,chunk_size,channel;
         unsigned data,samp_int,i;
@@ -67,7 +67,7 @@
 
   fread(&chunk_id,4,1,wavefile);
   fread(&chunk_size,4,1,wavefile);
-  while (!feof(wavefile)) {
+  while (!feof(wavefile) && *play_ptr == true) {
     if (verbosity)
       printf("Read chunk ID 0x%x, size 0x%x\n",chunk_id,chunk_size);
     switch (chunk_id) {
@@ -129,6 +129,8 @@
 // while 16 and 32 bit wave files use signed data
 //
         for (slice=0;slice<num_slices;slice+=1) {
+            if(*play_ptr == false)
+                break;
           fread(slice_buf,wav_format.block_align,1,wavefile);
           if (feof(wavefile)) {
             printf("Oops -- not enough slices in the wave file\n");
@@ -173,7 +175,11 @@
           dac_data=(short unsigned)slice_value;
           if (verbosity)
             printf("sample %d wptr %d slice_value %d dac_data %u\n",slice,DAC_wptr,(int)slice_value,dac_data);
-          DAC_fifo[DAC_wptr]=dac_data;
+           
+         // Scale data according to volume
+          // dac_data = (dac_data * (16 - *volume_ptr)) / 16; //JJH
+          DAC_fifo[DAC_wptr]= dac_data; 
+          
           DAC_wptr=(DAC_wptr+1) & 0xff;
           while (DAC_wptr==DAC_rptr) {
           }