audacity/tests/SimpleBlockFileTest.cpp

#include <iostream>
#include <ostream>
#include <cassert>

#include "sndfile.h"
#include "blockfile/SimpleBlockFile.h"


class SimpleBlockFileTest {
   SimpleBlockFile *int16BlockFile;
   SimpleBlockFile *int24BlockFile;
   SimpleBlockFile *floatBlockFile;

   int summaryLen;

   short *int16Data;
   int *int24Data;
   float *floatData;
   int dataLen;

public:
   SimpleBlockFileTest()
   {
       std::cout << "==> Testing SimpleBlockFile\n";
   }

   void setUp() {
      dataLen = 200000;

      int16Data = new short[dataLen];
      int24Data = new int[dataLen];
      floatData = new float[dataLen];

      int i;
      int sign = 1;

      for(i = 0; i < dataLen; i++)
      {
         sign *= -1;
         // These have no significance, it's just random data
         int16Data[i] = sign*(i*i);
         int24Data[i] = sign*((i*i*i)%0x000FFFFF);
         float j = (float) i;
         floatData[i] = sign*j/((j*j)+1);
      }

      int16BlockFile = new SimpleBlockFile(wxFileName("/tmp/int16"),
                                           (samplePtr)int16Data, dataLen,
                                           int16Sample);
      int24BlockFile = new SimpleBlockFile(wxFileName("/tmp/int24"),
                                           (samplePtr)int24Data, dataLen,
                                           int24Sample);
      floatBlockFile = new SimpleBlockFile(wxFileName("/tmp/float"),
                                           (samplePtr)floatData, dataLen,
                                           floatSample);

   }

   void tearDown() {
      delete [] int16Data;
      delete [] int24Data;
      delete [] floatData;
      delete int16BlockFile;
      delete int24BlockFile;
      delete floatBlockFile;
   }

   void testFileValidity() {
      // Use libsndfile to read the file.  Make sure:
      //    1. it is correctly recognized as an AU file
      //    2. it has all the header information we expect

      std::cout << "\tthe created files should be valid AU files with the expected number of samples...";
      std::cout << std::flush;

      BlockFile *theFiles[] = {int16BlockFile, int24BlockFile, floatBlockFile};

      for(int i = 0; i < 3; i++)
      {
         BlockFile *bf = theFiles[i];
         SF_INFO info;

         memset(&info, 0, sizeof(info));
         SNDFILE *sf = sf_open(bf->GetFileName().GetFullPath(), SFM_READ, &info);

         assert(sf);
         assert(info.frames == dataLen);
         assert(info.channels == 1);
         assert(info.format & SF_FORMAT_AU);

         sf_close(sf);
      }

      std::cout << "OK\n";
   }

   template<class T> void AssertBuffersEqual(T *b1, T *b2, int len)
   {
      for( int i = 0; i < len; i++ )
          if( b1[i] != b2[i] )
          {
              std::cout << b1[i] << " != " << b2[i] << " (i=" << i << ")" << std::endl;
              assert(false);
          }
   }

   void testCorrectDataWritten() {
      // use libsndfile to read back the whole blockfile, make sure it matches
      // the data we initially wrote
      std::cout << "\tVerifying that we wrote what we think we wrote..." << std::flush;

      SF_INFO info1, info2, info3;
      memset(&info1, 0, sizeof(info1));
      memset(&info2, 0, sizeof(info2));
      memset(&info3, 0, sizeof(info3));

      SNDFILE *int16sf = sf_open(int16BlockFile->GetFileName().GetFullPath(), SFM_READ, &info1);
      SNDFILE *int24sf = sf_open(int24BlockFile->GetFileName().GetFullPath(), SFM_READ, &info2);
      SNDFILE *floatsf = sf_open(floatBlockFile->GetFileName().GetFullPath(), SFM_READ, &info3);

      // First do a read of the entire block
      short int16buf[dataLen];
      int   int24buf[dataLen];
      float floatbuf[dataLen];

      sf_read_short(int16sf, int16buf, dataLen);
      sf_read_int  (int24sf, int24buf, dataLen);
      sf_read_float(floatsf, floatbuf, dataLen);

      AssertBuffersEqual(int16buf, int16Data, dataLen);
      AssertBuffersEqual(floatbuf, floatData, dataLen);

      // for the 24-bit buffer, libsndfile gives the 24 bits to us in the 3 most significant
      // byts of a 32-bit int.  So we need to shift them right 8 to get back our 24-bit data.
      for( int i = 0; i < dataLen; i++ )
          int24buf[i] = int24buf[i] >> 8;
      AssertBuffersEqual(int24buf, int24Data, dataLen);

      sf_close(int16sf);
      sf_close(int24sf);
      sf_close(floatsf);

      std::cout << "OK\n";
   }

   void testReads() {
      // Now use the blockfile's method to read data and compare it to what we originally wrote
       std::cout << "\tVerifying that we can read back correctly..." << std::flush;

       samplePtr int16buf = NewSamples(dataLen, int16Sample);
       samplePtr int24buf = NewSamples(dataLen, int24Sample);
       samplePtr floatbuf = NewSamples(dataLen, floatSample);

       // First try a read of the entire buffer
       int16BlockFile->ReadData(int16buf, int16Sample, 0, dataLen);
       int24BlockFile->ReadData(int24buf, int24Sample, 0, dataLen);
       floatBlockFile->ReadData(floatbuf, floatSample, 0, dataLen);

       AssertBuffersEqual(int16Data, (short*)int16buf, dataLen);
       AssertBuffersEqual(int24Data, (int*)int24buf, dataLen);
       AssertBuffersEqual(floatData, (float*)floatbuf, dataLen);

       // Now test a read that starts at the beginning but quits
       // before the end
       int someOffset = 537;

       int16BlockFile->ReadData(int16buf, int16Sample, 0, someOffset);
       int24BlockFile->ReadData(int24buf, int24Sample, 0, someOffset);
       floatBlockFile->ReadData(floatbuf, floatSample, 0, someOffset);

       AssertBuffersEqual(int16Data, (short*)int16buf, someOffset);
       AssertBuffersEqual(int24Data, (int*)int24buf, someOffset);
       AssertBuffersEqual(floatData, (float*)floatbuf, someOffset);

       // Now try a read that starts in the middle and goes to the
       // end
       int16BlockFile->ReadData(int16buf, int16Sample, someOffset, dataLen-someOffset);
       int24BlockFile->ReadData(int24buf, int24Sample, someOffset, dataLen-someOffset);
       floatBlockFile->ReadData(floatbuf, floatSample, someOffset, dataLen-someOffset);

       AssertBuffersEqual(int16Data+someOffset, (short*)int16buf, dataLen-someOffset);
       AssertBuffersEqual(int24Data+someOffset, (int*)int24buf, dataLen-someOffset);
       AssertBuffersEqual(floatData+someOffset, (float*)floatbuf, dataLen-someOffset);


       std::cout << "OK\n";
   }
};

int main()
{
    SimpleBlockFileTest tester;

    tester.setUp();
    tester.testFileValidity();
    tester.tearDown();

    tester.setUp();
    tester.testCorrectDataWritten();
    tester.tearDown();

    tester.setUp();
    tester.testReads();
    tester.tearDown();

    return 0;
}


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