Diff: wave_player.cpp

Revision:

2:32da40a33717

Parent:

0:62c18ade9a60

Child:

3:06bc8350c139

diff -r acc3e18e77ad -r 32da40a33717 wave_player.cpp
--- a/wave_player.cpp	Tue Jan 18 03:57:27 2011 +0000
+++ b/wave_player.cpp	Tue Nov 18 22:26:27 2014 +0000
@@ -12,8 +12,14 @@
 
 
 #include <mbed.h>
+#include <math.h>
 #include <stdio.h>
 #include <wave_player.h>
+#include <shared.h>
+
+Wiistate wiistate = Nothing;
+float vol = 0; //VOLUME FLOAT
+Mutex key;
 
 
 //-----------------------------------------------------------------------------
@@ -37,6 +43,49 @@
   verbosity=v;
 }
 
+int do_vol = 0;
+int do_flange = 1;
+int do_bit_crush = 0;
+int do_delay = 1;
+
+void update_state() {
+    Wiistate cur_state;
+    key.lock();
+        cur_state = wiistate;
+    key.unlock();
+    
+    if(cur_state == Left) {
+            do_vol = 1;
+            do_flange = 1;
+            do_bit_crush = 0;
+            do_delay = 0;
+    } else if(cur_state == Right) {
+            do_vol = 1;
+            do_flange = 0;
+            do_bit_crush = 1;
+            do_delay = 0;
+    } else if(cur_state == Up) {
+            do_vol = 1;
+            do_flange = 0;
+            do_bit_crush = 0;
+            do_delay = 1;
+    } else if(cur_state == Down) {
+            do_vol = 1;
+            do_flange = 1;
+            do_bit_crush = 0;
+            do_delay = 1;
+    } else if(cur_state == Nothing) {
+            do_vol = 0;
+            do_flange = 0;
+            do_bit_crush = 0;
+            do_delay = 0;
+            //printf("%d %d %d %d\r\n",  do_vol, do_flange, do_bit_crush, do_delay);
+            //printf("%d %d %d %d %d %d\r\n", cur_state==Nothing, Left, Right,Up,Down, Nothing);
+    }
+    
+    //printf("%d %d %d %d\r\n",  do_vol, do_flange, do_bit_crush, do_delay);
+}
+
 //-----------------------------------------------------------------------------
 // player function.  Takes a pointer to an opened wave file.  The file needs
 // to be stored in a filesystem with enough bandwidth to feed the wave data.
@@ -67,29 +116,52 @@
 
   fread(&chunk_id,4,1,wavefile);
   fread(&chunk_size,4,1,wavefile);
+
+
+////
+#define SAMPLE_RATE 11025
+#define D_SIZE 8000
+#define M_PI 3.14159265358979323846
+short unsigned delayed[D_SIZE];
+unsigned int d_rptr = 0;
+unsigned int d_wptr = D_SIZE-1000;//((float)D_SIZE)/2.0;
+unsigned int d_wptr_2 = D_SIZE-3000;
+int flange = 0; // CHANG
+int flange_amplitude = D_SIZE/4; // /2
+//int flange_freq = SAMPLE_RATE; // 2*pi*cur_samp_cnt/11025
+float cur_samp_cnt = 0;
+int flange_r_ptr = 0;
+int flange_dir = 1;
+int flip_sec = 0;
+
+////
+for(int di = 0; di < D_SIZE; di++) {
+    delayed[di] = 0;
+}
+  
   while (!feof(wavefile)) {
     if (verbosity)
-      printf("Read chunk ID 0x%x, size 0x%x\n",chunk_id,chunk_size);
+      printf("Read chunk ID 0x%x, size 0x%x\r\n",chunk_id,chunk_size);
     switch (chunk_id) {
       case 0x46464952:
         fread(&data,4,1,wavefile);
         if (verbosity) {
-          printf("RIFF chunk\n");
-          printf("  chunk size %d (0x%x)\n",chunk_size,chunk_size);
-          printf("  RIFF type 0x%x\n",data);
+          printf("RIFF chunk\r\n");
+          printf("  chunk size %d (0x%x)\r\n",chunk_size,chunk_size);
+          printf("  RIFF type 0x%x\r\n",data);
         }
         break;
       case 0x20746d66:
         fread(&wav_format,sizeof(wav_format),1,wavefile);
         if (verbosity) {
-          printf("FORMAT chunk\n");
-          printf("  chunk size %d (0x%x)\n",chunk_size,chunk_size);
-          printf("  compression code %d\n",wav_format.comp_code);
-          printf("  %d channels\n",wav_format.num_channels);
-          printf("  %d samples/sec\n",wav_format.sample_rate);
-          printf("  %d bytes/sec\n",wav_format.avg_Bps);
-          printf("  block align %d\n",wav_format.block_align);
-          printf("  %d bits per sample\n",wav_format.sig_bps);
+          printf("FORMAT chunk\r\n");
+          printf("  chunk size %d (0x%x)\r\n",chunk_size,chunk_size);
+          printf("  compression code %d\r\n",wav_format.comp_code);
+          printf("  %d channels\r\n",wav_format.num_channels);
+          printf("  %d samples/sec\r\n",wav_format.sample_rate);
+          printf("  %d bytes/sec\r\n",wav_format.avg_Bps);
+          printf("  block align %d\r\n",wav_format.block_align);
+          printf("  %d bits per sample\r\n",wav_format.sig_bps);
         }
         if (chunk_size > sizeof(wav_format))
           fseek(wavefile,chunk_size-sizeof(wav_format),SEEK_CUR);
@@ -104,11 +176,11 @@
         num_slices=chunk_size/wav_format.block_align;
         samp_int=1000000/(wav_format.sample_rate);
         if (verbosity) {
-          printf("DATA chunk\n");
-          printf("  chunk size %d (0x%x)\n",chunk_size,chunk_size);
-          printf("  %d slices\n",num_slices);
-          printf("  Ideal sample interval=%d\n",(unsigned)(1000000.0/wav_format.sample_rate));
-          printf("  programmed interrupt tick interval=%d\n",samp_int);
+          printf("DATA chunk\r\n");
+          printf("  chunk size %d (0x%x)\r\n",chunk_size,chunk_size);
+          printf("  %d slices\r\n",num_slices);
+          printf("  Ideal sample interval=%d\r\n",(unsigned)(1000000.0/wav_format.sample_rate));
+          printf("  programmed interrupt tick interval=%d\r\n",samp_int);
         }
 
 // starting up ticker to write samples out -- no printfs until tick.detach is called
@@ -128,10 +200,12 @@
 // note that from what I can find that 8 bit wave files use unsigned data,
 // while 16 and 32 bit wave files use signed data
 //
+
+
         for (slice=0;slice<num_slices;slice+=1) {
           fread(slice_buf,wav_format.block_align,1,wavefile);
           if (feof(wavefile)) {
-            printf("Oops -- not enough slices in the wave file\n");
+            printf("Oops -- not enough slices in the wave file\r\n");
             exit(1);
           }
           data_sptr=(short *)slice_buf;     // 16 bit samples
@@ -172,8 +246,98 @@
           }
           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;
+            printf("sample %d wptr %d slice_value %d dac_data %u\r\n",slice,DAC_wptr,(int)slice_value,dac_data);
+            
+            
+            
+          update_state();
+          
+            
+          ////
+          delayed[d_rptr] = dac_data;
+          
+          d_rptr = (d_rptr == (D_SIZE-1)) ? 0 : (d_rptr + 1);
+          d_wptr = (d_wptr == (D_SIZE-1)) ? 0 : (d_wptr + 1);
+          d_wptr_2 = (d_wptr_2 == (D_SIZE-1)) ? 0 : (d_wptr_2 + 1);
+          
+          float f_dac_data = (float)dac_data;
+          float f_delay_data;
+          float f_delay_data_2;
+          int flange_dist = 0;
+          int flange_dist_check;
+          if(flange) {
+            flange_dist = flange_amplitude*sin(2*M_PI*cur_samp_cnt/(float)SAMPLE_RATE);
+            /*if(cur_samp_cnt != 0) {
+                while(cur_samp_cnt < 4000) {
+                    flange_dist = flange_amplitude*sin(2*M_PI*cur_samp_cnt/(float)SAMPLE_RATE);
+                printf("%f %f\r\n", flange_dist, 2*M_PI*cur_samp_cnt/(float)SAMPLE_RATE);
+                cur_samp_cnt++;
+                }
+                return;
+            }*/
+            //printf("%d\r\n",flange_dist);
+            flange_dist_check = d_wptr + flange_dist - D_SIZE;
+            //d_wptr += flange_dist_check > 0 ? flange_dist_check : (d_wptr + flange_dist) < 0 ? (D_SIZE + d_wptr + flange_dist) : flange_dist;
+            //d_wptr += flange_dist_check < 0 ? flange_dist : ((d_wptr + flange_dist) < 0) ? 0 : flange_dist;
+            d_wptr = ((d_wptr + flange_dist) > 0) ? (d_wptr + flange_dist) % D_SIZE : (D_SIZE + flange_dist); //(D_SIZE + flange_dist) WRONG
+          }
+          //cur_samp_cnt = (cur_samp_cnt+1) > SAMPLE_RATE ? 0 : (cur_samp_cnt+1);
+          cur_samp_cnt = (cur_samp_cnt+1) > SAMPLE_RATE ? 0 : (cur_samp_cnt+1);
+          
+          if(cur_samp_cnt == 0) {
+              flip_sec = !flip_sec;
+          }
+          
+          
+          #define N_SAMPLES_FLANGE_PERIOD 100//((SAMPLE_RATE) >> 2) // WHY IS MZ 100???
+          
+          if(do_flange) {// && (flip_sec)) {
+            if(flange_r_ptr == N_SAMPLES_FLANGE_PERIOD) {
+                flange_dir = -1;
+            } else if(flange_r_ptr == -N_SAMPLES_FLANGE_PERIOD) {
+                flange_dir = 1;   
+            }
+            flange_r_ptr += flange_dir;   
+          } else {
+            flange_r_ptr = 0;     
+          }
+          
+          int total_ptr = (d_wptr + flange_r_ptr);
+          total_ptr = (total_ptr > D_SIZE) ? (total_ptr - D_SIZE) : total_ptr;
+          total_ptr = (total_ptr < 0) ? (D_SIZE - total_ptr) : total_ptr;
+          
+          //f_delay_data = (float) delayed[d_wptr];
+          f_delay_data = (float) delayed[total_ptr];
+          f_delay_data_2 = (float) delayed[d_wptr_2];
+          float f_mix;
+          
+          
+          if(do_delay || do_flange) {
+              if(do_flange) {
+                  f_mix = 0.01*f_dac_data + 0.7*f_delay_data;
+              } else {
+                  f_mix = 0.333*f_dac_data + 0.333*f_delay_data + 0.333*f_delay_data_2;
+              }
+              //0.01*f_dac_data + 0.7*f_delay_data;
+          } else {
+              f_mix = f_dac_data;
+          }
+          ////
+          
+          float time_in_period = (float)cur_samp_cnt/(float)SAMPLE_RATE;
+          //float vol = 0.5 + 0.5*sin(2*M_PI*time_in_period); // Full dynamic range
+          float my_vol = 0.75 + 0.25*sin(2*M_PI*time_in_period);
+          
+          if(do_vol) f_mix = (my_vol*f_mix);
+          
+          if(do_bit_crush) {
+              short unsigned beef = (short unsigned)f_mix;
+              //beef = (beef>>7) << 7;
+              //printf("beef %x\r\nbeeeef %x\r\n", beef, beef & 0xFFF0);
+              DAC_fifo[DAC_wptr]=beef &0xF800;
+          } else {
+              DAC_fifo[DAC_wptr]=(short unsigned)(f_mix);
+          }
           DAC_wptr=(DAC_wptr+1) & 0xff;
           while (DAC_wptr==DAC_rptr) {
           }
@@ -184,11 +348,11 @@
         break;
       case 0x5453494c:
         if (verbosity)
-          printf("INFO chunk, size %d\n",chunk_size);
+          printf("INFO chunk, size %d\r\n",chunk_size);
         fseek(wavefile,chunk_size,SEEK_CUR);
         break;
       default:
-        printf("unknown chunk type 0x%x, size %d\n",chunk_id,chunk_size);
+        printf("unknown chunk type 0x%x, size %d\r\n",chunk_id,chunk_size);
         data=fseek(wavefile,chunk_size,SEEK_CUR);
         break;
     }
@@ -202,7 +366,7 @@
 {
   if (DAC_on) {
 #ifdef VERBOSE
-  printf("ISR rdptr %d got %u\n",DAC_rptr,DAC_fifo[DAC_rptr]);
+  printf("ISR rdptr %d got %u\r\n",DAC_rptr,DAC_fifo[DAC_rptr]);
 #endif
     wave_DAC->write_u16(DAC_fifo[DAC_rptr]);
     DAC_rptr=(DAC_rptr+1) & 0xff;