C++ TrackProgress函数代码示例

bool EffectAmplify::ProcessOne(int count, WaveTrack *t,
                               sampleCount start, sampleCount len)
{
   sampleCount s = start;
   sampleCount originalLen = len;
   sampleCount blockSize = t->GetMaxBlockSize();

   sampleType *buffer = new sampleType[blockSize];
   
   while (len) {
      unsigned int block = t->GetBestBlockSize(s);
      if (block > len)
         block = len;

      t->Get(buffer, s, block);
      for (unsigned int i = 0; i < block; i++) {
         buffer[i] = (sampleType) (buffer[i] * ratio);
      }
      t->Set(buffer, s, block);

      len -= block;
      s += block;
      
      if (TrackProgress(count, (s-start)/(double)originalLen))
         break;
   }

   delete[] buffer;

   return true;
}

bool EffectInvert::ProcessOne(int count, WaveTrack *t,
                              sampleCount start, sampleCount len)
{
   // keep track of two blocks whose data we will swap
   sampleCount s = start;
   sampleCount originalLen = len;
   sampleCount blockSize = t->GetMaxBlockSize();
   
   sampleType *buffer = new sampleType[blockSize];
   
   while (len > 0) {
      unsigned int block = t->GetBestBlockSize(s);
      if (block > len)
         block = len;

      t->Get(buffer, s, block);
      for (unsigned int i = 0; i < block; i++) {
         buffer[i] = (sampleType) (-buffer[i]);
      }
      t->Set(buffer, s, block);

      len -= block;
      s += block;

      TrackProgress(count, (s-start)/(double)originalLen);
   }

   delete[] buffer;

   return true;
}

bool BlockGenerator::GenerateTrack(WaveTrack *tmp,
                                   const WaveTrack &track,
                                   int ntrack)
{
   bool bGoodResult = true;
   numSamples = track.TimeToLongSamples(GetDuration());
   sampleCount i = 0;
   float *data = new float[tmp->GetMaxBlockSize()];
   sampleCount block = 0;

   while ((i < numSamples) && bGoodResult) {
      block = tmp->GetBestBlockSize(i);
      if (block > (numSamples - i))
         block = numSamples - i;

      GenerateBlock(data, track, block);

      // Add the generated data to the temporary track
      tmp->Append((samplePtr)data, floatSample, block);
      i += block;

      // Update the progress meter
      if (TrackProgress(ntrack, (double)i / numSamples))
         bGoodResult = false;
   }
   delete[] data;
   return bGoodResult;
}

bool EffectRepeat::Process()
{
   this->CopyInputWaveTracks(); // Set up mOutputWaveTracks.
   bool bGoodResult = true;

   TrackListIterator iter(mOutputWaveTracks);
   WaveTrack *track = (WaveTrack *) iter.First();
   int nTrack = 0;
	double maxDestLen = 0.0; // used to change selection to generated bit
   while ((track != NULL) && bGoodResult) {
      double trackStart = track->GetStartTime();
      double trackEnd = track->GetEndTime();
      double t0 = mT0 < trackStart? trackStart: mT0;
      double t1 = mT1 > trackEnd? trackEnd: mT1;

      if (t1 <= t0)
         continue;

      sampleCount start = track->TimeToLongSamples(t0);
      sampleCount end = track->TimeToLongSamples(t1);
      sampleCount len = (sampleCount)(end - start);
      double tLen = track->LongSamplesToTime(len);
      double tc = t0 + tLen;

      if (len <= 0)
         continue;

      Track *dest;
      track->Copy(t0, t1, &dest);
      for(int j=0; j<repeatCount; j++)
      {
         if (!track->Paste(tc, dest) || 
               TrackProgress(nTrack, j / repeatCount)) // TrackProgress returns true on Cancel.
         {
            bGoodResult = false;
            break;
         }
         tc += tLen;
      }
      if (tc > maxDestLen)
         maxDestLen = tc;
      delete dest;

      track = (WaveTrack *) iter.Next();
      nTrack++;
   }

   if (bGoodResult)
   {
      // Change selection to just the generated bits.
      mT0 = mT1;
	   mT1 = maxDestLen;
   }

   this->ReplaceProcessedWaveTracks(bGoodResult); 
   return bGoodResult;
}

bool EffectClickRemoval::ProcessOne(int count, WaveTrack * track,
                                    sampleCount start, sampleCount len)
{
   bool rc = true;
   sampleCount s = 0;
   sampleCount idealBlockLen = track->GetMaxBlockSize() * 4;

   if (idealBlockLen % windowSize != 0)
      idealBlockLen += (windowSize - (idealBlockLen % windowSize));

   float *buffer = new float[idealBlockLen];

   float *datawindow = new float[windowSize];

   int i;

   while((s < len)&&((len-s)>(windowSize/2))) {
      sampleCount block = idealBlockLen;
      if (s + block > len)
         block = len - s;

      track->Get((samplePtr) buffer, floatSample, start + s, block);

      for(i=0; i<(block-windowSize/2); i+=windowSize/2) {
         int wcopy = windowSize;
         if (i + wcopy > block)
            wcopy = block - i;

         int j;
         for(j=0; j<wcopy; j++)
            datawindow[j] = buffer[i+j];
         for(j=wcopy; j<windowSize; j++)
            datawindow[j] = 0;

         RemoveClicks(windowSize, datawindow);

         for(j=0; j<wcopy; j++)
           buffer[i+j] = datawindow[j];
      }

      track->Set((samplePtr) buffer, floatSample, start + s, block);

      s += block;

      if (TrackProgress(count, s / (double) len)) {
         rc = false;
         break;
      }
   }

   delete[] buffer;
   delete[] datawindow;

   return rc;
}

//ProcessOne() takes a track, transforms it to bunch of buffer-blocks,
//and executes ProcessData, on it...
// uses mMult and mOffset to normalize a track.  Needs to have them set before being called
bool EffectNormalize::ProcessOne(WaveTrack * track, wxString msg)
{
   bool rc = true;
   sampleCount s;

   //Transform the marker timepoints to samples
   sampleCount start = track->TimeToLongSamples(mCurT0);
   sampleCount end = track->TimeToLongSamples(mCurT1);
         
   //Get the length of the buffer (as double). len is
   //used simply to calculate a progress meter, so it is easier
   //to make it a double now than it is to do it later 
   double len = (double)(end - start);

   //Initiate a processing buffer.  This buffer will (most likely)
   //be shorter than the length of the track being processed.
   float *buffer = new float[track->GetMaxBlockSize()];

   //Go through the track one buffer at a time. s counts which
   //sample the current buffer starts at.
   s = start;
   while (s < end) {
      //Get a block of samples (smaller than the size of the buffer)
      sampleCount block = track->GetBestBlockSize(s);
      
      //Adjust the block size if it is the final block in the track
      if (s + block > end)
         block = end - s;
      
      //Get the samples from the track and put them in the buffer
      track->Get((samplePtr) buffer, floatSample, s, block);
      
      //Process the buffer.
      ProcessData(buffer, block);
   
      //Copy the newly-changed samples back onto the track.
      track->Set((samplePtr) buffer, floatSample, s, block);
         
      //Increment s one blockfull of samples
      s += block;
      
      //Update the Progress meter
		if (TrackProgress(mCurTrackNum, 
                        0.5+((double)(s - start) / len)/2.0, msg)) {
         rc = false; //lda .. break, not return, so that buffer is deleted
         break;
      }
   }
   //Clean up the buffer
   delete[] buffer;

   //Return true because the effect processing succeeded ... unless cancelled
   return rc;
}

//ProcessOne() takes a track, transforms it to bunch of buffer-blocks,
//and executes ProcessSimpleMono on these blocks
bool EffectSimpleMono::ProcessOne(WaveTrack * track,
                                  longSampleCount start, longSampleCount end)
{
   
   longSampleCount s;
   //Get the length of the buffer (as double). len is
   //used simple to calculate a progress meter, so it is easier
   //to make it a double now than it is to do it later 
   double len = (double)(end - start);

   //Initiate a processing buffer.  This buffer will (most likely)
   //be shorter than the length of the track being processed.
   float *buffer = new float[track->GetMaxBlockSize()];

   //Go through the track one buffer at a time. s counts which
   //sample the current buffer starts at.
   s = start;
   while (s < end) {
      //Get a block of samples (smaller than the size of the buffer)
      sampleCount block = track->GetBestBlockSize(s);

      //Adjust the block size if it is the final block in the track
      if (s + block > end)
         block = end - s;

      //Get the samples from the track and put them in the buffer
      track->Get((samplePtr) buffer, floatSample, s, block);

      //Process the buffer.  If it fails, clean up and exit.
      if (!ProcessSimpleMono(buffer, block)) {
         delete[]buffer;

         //Return false because the effect failed.
         return false;
      }

      //Processing succeeded. copy the newly-changed samples back 
      //onto the track.
      track->Set((samplePtr) buffer, floatSample, s, block);

      //Increment s one blockfull of samples
      s += block;

      //Update the Progress meter
      if (TrackProgress(mCurTrackNum, s / len))
         return false;
   }

   //Clean up the buffer
   delete[]buffer;

   //Return true because the effect processing succeeded.
   return true;
}

bool EffectRepair::ProcessOne(int count, WaveTrack * track,
                              sampleCount start,
                              size_t len,
                              size_t repairStart, size_t repairLen)
{
   Floats buffer{ len };
   track->Get((samplePtr) buffer.get(), floatSample, start, len);
   InterpolateAudio(buffer.get(), len, repairStart, repairLen);
   track->Set((samplePtr)&buffer[repairStart], floatSample,
              start + repairStart, repairLen);
   return !TrackProgress(count, 1.0); // TrackProgress returns true on Cancel.
}

bool EffectEcho::ProcessOne(int count, WaveTrack * track,
                            sampleCount start, sampleCount len)
{
   sampleCount s = 0;
   sampleCount blockSize = (sampleCount) (track->GetRate() * delay);
   
   //do nothing if the delay is less than 1 sample or greater than
   //the length of the selection
   if (blockSize < 1 || blockSize > len)
      return true;

   float *buffer0 = new float[blockSize];
   float *buffer1 = new float[blockSize];

   float *ptr0 = buffer0;
   float *ptr1 = buffer1;

   bool first = true;

   while (s < len) {
      sampleCount block = blockSize;
      if (s + block > len)
         block = len - s;

      track->Get((samplePtr)ptr0, floatSample, start + s, block);
      if (!first) {
         for (sampleCount i = 0; i < block; i++)
            ptr0[i] += ptr1[i] * decay;
         track->Set((samplePtr)ptr0, floatSample, start + s, block);
      }

      float *ptrtemp = ptr0;
      ptr0 = ptr1;
      ptr1 = ptrtemp;

      first = false;

      s += block;
      
      if (TrackProgress(count, s / (double) len)) {
         delete[]buffer0;
         delete[]buffer1;

         return false;
      }
   }

   delete[]buffer0;
   delete[]buffer1;

   return true;
}

bool EffectRepair::ProcessOne(int count, WaveTrack * track,
                              sampleCount start,
                              sampleCount len,
                              sampleCount repairStart, sampleCount repairLen)
{
   float *buffer = new float[len];
   track->Get((samplePtr) buffer, floatSample, start, len);
   InterpolateAudio(buffer, len, repairStart, repairLen);
   track->Set((samplePtr)&buffer[repairStart], floatSample,
              start + repairStart, repairLen);
   delete[] buffer;
   return !TrackProgress(count, 1.0); // TrackProgress returns true on Cancel.
}

bool EffectEcho::ProcessOne(int count, WaveTrack * t,
                            sampleCount start, sampleCount len)
{
   sampleCount s = start;
   sampleCount blockSize = (sampleCount) (t->rate * delay);
   
   sampleCount originalLen = len;

   if (blockSize < 1 || blockSize > len)
      return true;

   sampleType *buffer0 = new sampleType[blockSize];
   sampleType *buffer1 = new sampleType[blockSize];

   sampleType *ptr0 = buffer0;
   sampleType *ptr1 = buffer1;

   bool first = true;

   while (len) {
      sampleCount block = blockSize;
      if (block > len)
         block = len;

      t->Get(ptr0, s, block);
      if (!first) {
         for (sampleCount i = 0; i < block; i++)
            ptr0[i] += (sampleType) (ptr1[i] * decay);
         t->Set(ptr0, s, block);
      }

      sampleType *ptrtemp = ptr0;
      ptr0 = ptr1;
      ptr1 = ptrtemp;

      first = false;

      len -= block;
      s += block;
      
      TrackProgress(count, (s-start)/(double)originalLen);
   }

   delete[]buffer0;
   delete[]buffer1;

   return true;
}

bool EffectStereoToMono::ProcessOne(int count)
{
   float  curLeftFrame;
   float  curRightFrame;
   float  curMonoFrame;

   sampleCount idealBlockLen = mLeftTrack->GetMaxBlockSize() * 2;
   sampleCount index = mStart;
   float *leftBuffer = new float[idealBlockLen];
   float *rightBuffer = new float[idealBlockLen];
   bool bResult = true;

   while (index < mEnd) {
      bResult &= mLeftTrack->Get((samplePtr)leftBuffer, floatSample, index, idealBlockLen);
      bResult &= mRightTrack->Get((samplePtr)rightBuffer, floatSample, index, idealBlockLen);
      sampleCount limit = idealBlockLen;
      if ((index + idealBlockLen) > mEnd) {
         limit = mEnd - index;
      }
      for (sampleCount i = 0; i < limit; ++i) {
         index++;
         curLeftFrame = leftBuffer[i];
         curRightFrame = rightBuffer[i];
         curMonoFrame = (curLeftFrame + curRightFrame) / 2.0;
         leftBuffer[i] = curMonoFrame;
      }
      bResult &= mOutTrack->Append((samplePtr)leftBuffer, floatSample, limit);
      if (TrackProgress(count, 2.*((double)index / (double)(mEnd - mStart))))
         return false;
   }

   double minStart = wxMin(mLeftTrack->GetStartTime(), mRightTrack->GetStartTime());
   bResult &= mLeftTrack->Clear(mLeftTrack->GetStartTime(), mLeftTrack->GetEndTime());
   bResult &= mOutTrack->Flush();
   bResult &= mLeftTrack->Paste(minStart, mOutTrack);
   mLeftTrack->SetLinked(false);
   mRightTrack->SetLinked(false);
   mLeftTrack->SetChannel(Track::MonoChannel);
   mOutputTracks->Remove(mRightTrack);
   delete mRightTrack;

   delete [] leftBuffer;
   delete [] rightBuffer;

   return bResult;
}

bool EffectReverse::ProcessOneClip(int count, WaveTrack *track,
                               sampleCount start, sampleCount len,
                               sampleCount originalStart, sampleCount originalEnd)
{
   bool rc = true;
   // keep track of two blocks whose data we will swap
   sampleCount first = start;
   sampleCount second;

   sampleCount blockSize = track->GetMaxBlockSize();
   float tmp;
   float *buffer1 = new float[blockSize];
   float *buffer2 = new float[blockSize];
   
   sampleCount originalLen = (sampleCount)originalEnd-originalStart;

   while (len > 1) {
      sampleCount block = track->GetBestBlockSize(first);
      if (block > len / 2)
         block = len / 2;
      second = first + (len - block);

      track->Get((samplePtr)buffer1, floatSample, first, block);
      track->Get((samplePtr)buffer2, floatSample, second, block);
      for (int i = 0; i < block; i++) {
         tmp = buffer1[i];
         buffer1[i] = buffer2[block-i-1];
         buffer2[block-i-1] = tmp;
      }
      track->Set((samplePtr)buffer1, floatSample, first, block);
      track->Set((samplePtr)buffer2, floatSample, second, block);

      len -= 2 * block;
      first += block;
      
      if( TrackProgress(count, 2*(first-originalStart) / (double) originalLen) ) {
         rc = false;
         break;
      }
   }

   delete[] buffer1;
   delete[] buffer2;

   return rc;
}

bool EffectReverse::ProcessOneClip(int count, WaveTrack *track,
                               sampleCount start, sampleCount len,
                               sampleCount originalStart, sampleCount originalEnd)
{
   bool rc = true;
   // keep track of two blocks whose data we will swap
   auto first = start;

   auto blockSize = track->GetMaxBlockSize();
   float tmp;
   Floats buffer1{ blockSize };
   Floats buffer2{ blockSize };

   auto originalLen = originalEnd - originalStart;

   while (len > 1) {
      auto block =
         limitSampleBufferSize( track->GetBestBlockSize(first), len / 2 );
      auto second = first + (len - block);

      track->Get((samplePtr)buffer1.get(), floatSample, first, block);
      track->Get((samplePtr)buffer2.get(), floatSample, second, block);
      for (decltype(block) i = 0; i < block; i++) {
         tmp = buffer1[i];
         buffer1[i] = buffer2[block-i-1];
         buffer2[block-i-1] = tmp;
      }
      track->Set((samplePtr)buffer1.get(), floatSample, first, block);
      track->Set((samplePtr)buffer2.get(), floatSample, second, block);

      len -= 2 * block;
      first += block;

      if( TrackProgress(count, 2 * ( first - originalStart ).as_double() /
                        originalLen.as_double() ) ) {
         rc = false;
         break;
      }
   }

   return rc;
}

bool EffectSineSweepGenerator::GenerateTrack(WaveTrack *tmp, const WaveTrack &track, int ntrack)
{
#ifdef __AUDEBUG__
   printf("elsg: GENERATETRACK\n"); fflush(stdout); // ************DEBUG
#endif
   bool bGoodResult = true;
   //numSamples = track.TimeToLongSamples(mDuration);
   sampleCount numSamples;
   //Filter has different length
   if(ntrack == m_pSsg->GetFilterChannel())       
      numSamples = sampleCount(m_pSsg->GetFilterLength());
   else
      numSamples = sampleCount(m_pSsg->GetBuffersLength());
   
   sampleCount i = 0;
   AFSample *data = new AFSample[tmp->GetMaxBlockSize()];
   sampleCount block = 0;

   while ((i < numSamples) && bGoodResult) 
   {
      block = tmp->GetBestBlockSize(i);
      if (block > (numSamples - i))
         block = numSamples - i;

//       GenerateBlock(data, track, block);
      m_pSsg->FillBlock(data, AFSampleCount(block), AFSampleCount(i), ntrack);

      // Add the generated data to the temporary track
      tmp->Append((samplePtr)data, floatSample, block);
      i += block;

      // Update the progress meter
      if (TrackProgress(ntrack, (double)i / numSamples))
         bGoodResult = false;
      
   }
   tmp->Flush();

   delete[] data;
   return bGoodResult;   
}