# HG changeset patch
# User Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
# Date 1407258545 -32400
# Node ID f31415b52f51ae6d163eff35bef4ab89573561fb
# Parent  472528b62bbf4a58a8954d340063244f2216f398
implement saw

diff -r 472528b62bbf -r f31415b52f51 example/synthesizer/main.cc
--- a/example/synthesizer/main.cc	Sun Jul 27 23:40:37 2014 +0900
+++ b/example/synthesizer/main.cc	Wed Aug 06 02:09:05 2014 +0900
@@ -15,6 +15,7 @@
 #include <sdl.h>
 #include <SDL_audio.h>
 #include <math.h>
+#include <OpenAL/al.h>
 
 /*
  * PS3でCPU数が2以上の時に、あまりが計算されてない
@@ -39,6 +40,7 @@
     au->waveform_name = waveform_name;
 
     printf("Freq:%f\n",frequency);
+    printf("wav:%s\n",waveform_name);
     au->sampling_rate= 44100; /* Sampling rate: 44100Hz */
     au->format= AUDIO_S16LSB; /* 16-bit signed audio */
     au->channels= 1; /* Mono */
diff -r 472528b62bbf -r f31415b52f51 example/synthesizer/ppe/OSC.cc
--- a/example/synthesizer/ppe/OSC.cc	Sun Jul 27 23:40:37 2014 +0900
+++ b/example/synthesizer/ppe/OSC.cc	Wed Aug 06 02:09:05 2014 +0900
@@ -29,6 +29,11 @@
     }
 }
 
+double saw(double t){
+    double decimal_part = t - abs(t);
+    return decimal_part;
+}
+
 
 void callback(void *userdata,Uint8 *stream,int len){
 
@@ -41,18 +46,21 @@
     Uint16 *frames = (Uint16 *) stream;
     int framesize = len / 2;
 
-    if(strcmp(waveform_name, "tri")){
-
+    if(strcmp(waveform_name, "tri") == 0){
         for (int i = 0; i < framesize ; i++, step++){
             frames[i] = tri(step * frequency / Obtained.freq) * volume ;
         }
 
-    }else if(strcmp(waveform_name, "sqr")){
-
+    }else if(strcmp(waveform_name, "sqr") == 0){
         for (int i = 0; i < framesize ; i++, step++){
             frames[i] = square(step * frequency / Obtained.freq) * volume ;
         }
 
+    }else if(strcmp(waveform_name, "saw") == 0){
+        for (int i = 0; i < framesize ; i++, step++){
+            frames[i] = saw(step * frequency / Obtained.freq) * volume ;
+        }
+
     }
 }
 
@@ -61,10 +69,6 @@
 {
     AudioData *i_data = (AudioDataPtr)s->get_input(0);
 
-    const char* waveform_name = "tri";
-
-    i_data->userdata = (void*)waveform_name;
-
     Desired.freq = i_data->sampling_rate; /* Sampling rate: 44100Hz */
     Desired.format = i_data->format; /* 16-bit signed audio */
     Desired.channels = i_data->channels; /* Mono */