ok so far...

samplebrain/src/brain.cpp

@@ -25,6 +25,8 @@ sample brain::load_sound(std::string filename) {
 // rewrites whole brain
 void brain::init(u32 block_size, u32 overlap) {
     m_blocks.clear();
+    m_block_size = block_size;
+    m_overlap = overlap;
     for (vector<sample>::iterator i=m_samples.begin(); i!=m_samples.end(); ++i) {
         chop_and_add(*i, block_size, overlap);
     }
@@ -40,12 +42,17 @@ void brain::chop_and_add(const sample &s, u32 block_size, u32 overlap) {
     }
 }
 
+const sample &brain::get_block_pcm(u32 index) const {
+    return m_blocks[index].get_pcm();
+}
+
+
 // returns index to block
-u32 brain::search(const brain_block &target, float ratio) {
+u32 brain::search(const brain_block &target, float ratio) const {
     double closest = 999999999;
     u32 closest_index = 0;
     u32 index = 0;
-    for (vector<brain_block>::iterator i=m_blocks.begin(); i!=m_blocks.end(); ++i) {
+    for (vector<brain_block>::const_iterator i=m_blocks.begin(); i!=m_blocks.end(); ++i) {
         double diff = target.compare(*i,ratio);
         if (diff<closest) {
             closest=diff;
@@ -59,8 +66,14 @@ u32 brain::search(const brain_block &target, float ratio) {
 // take another brain and rebuild this brain from bits of that one
 // (presumably this one is made from a single sample)
 sample brain::resynth(const brain &other, float ratio){
-
+    sample out(m_block_size*m_blocks.size());
-
+    u32 pos=0;
+    for (vector<brain_block>::iterator i=m_blocks.begin(); i!=m_blocks.end(); ++i) {
+        u32 index = other.search(*i,ratio);
+        out.mix(other.get_block_pcm(index),pos);
+        pos += m_block_size-m_overlap;
+    }
+    return out;
 }
 
 
@@ -91,13 +104,15 @@ bool brain::unit_test() {
     brain b2;
     b2.load_sound("test_data/100f32.wav");
     b2.load_sound("test_data/100f32.wav");
-    assert(b.m_samples.size()==2);
+    assert(b2.m_samples.size()==2);
+    b2.init(10, 0);
     b.init(10, 0);
-    assert(b.m_blocks.size()==20);
+    assert(b2.m_blocks.size()==20);
-
     assert(b.search(b2.m_blocks[0],1)==0);
-    assert(b.search(b2.m_blocks[19],1)==19);
+    assert(b.search(b2.m_blocks[9],1)==9);
 
+    sample r = b2.resynth(b,1);
+    assert(r.get_length()==200);
 
     return true;
 }

samplebrain/src/brain.h

@@ -20,6 +20,8 @@ public:
     // todo: add tags
     sample load_sound(std::string filename);
 
+    const sample &get_block_pcm(u32 index) const;
+
     // take another brain and rebuild this brain from bits of that one
     // (presumably this one is made from a single sample)
     sample resynth(const brain &other, float ratio);
@@ -28,12 +30,14 @@ public:
 
 private:
 
-    u32 search(const brain_block &target, float ratio);
+    u32 search(const brain_block &target, float ratio) const;
     void chop_and_add(const sample &s, u32 block_size, u32 overlap);
 
     vector<brain_block> m_blocks;
     vector<sample> m_samples;
 
+    u32 m_block_size;
+    u32 m_overlap;
 };
 
 #endif

samplebrain/src/brain_block.cpp

@@ -85,8 +85,14 @@ bool brain_block::unit_test() {
         data[i]=i;
     }
 
+    brain_block cpy("test",data,100);
+    {
     brain_block bb3("test",data2,44100);
     assert(bb.compare(bb3,1)!=0);
+    cpy=bb3;
+    }
+
+    assert(cpy.m_pcm.get_length()==20);
 
     return true;
 }

samplebrain/src/brain_block.h

@@ -19,6 +19,8 @@ public:
     static void init_fft(u32 block_size);
     static bool unit_test();
 
+    const sample &get_pcm() const { return m_pcm; }
+
 private:
     sample m_pcm;
     sample m_fft;