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C++ WaveTrack::AppendCoded方法代码示例

本文整理汇总了C++中WaveTrack::AppendCoded方法的典型用法代码示例。如果您正苦于以下问题:C++ WaveTrack::AppendCoded方法的具体用法?C++ WaveTrack::AppendCoded怎么用?C++ WaveTrack::AppendCoded使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在WaveTrack的用法示例。


在下文中一共展示了WaveTrack::AppendCoded方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: Import


//.........这里部分代码省略.........
#ifdef EXPERIMENTAL_OD_FFMPEG
   mUsingOD = false;
   gPrefs->Read(wxT("/Library/FFmpegOnDemand"), &mUsingOD);
   //at this point we know the file is good and that we have to load the number of channels in mScs[s]->m_stream->codec->channels;
   //so for OD loading we create the tracks and releasee the modal lock after starting the ODTask.
   if (mUsingOD) {
      std::vector<ODDecodeFFmpegTask*> tasks;
      //append blockfiles to each stream and add an individual ODDecodeTask for each one.
      for (int s = 0; s < mNumStreams; s++) {
         ODDecodeFFmpegTask* odTask=new ODDecodeFFmpegTask(mScs,mNumStreams,mChannels,mFormatContext, s);
         odTask->CreateFileDecoder(mFilename);

         //each stream has different duration.  We need to know it if seeking is to be allowed.
         sampleCount sampleDuration = 0;
         if (mScs[s]->m_stream->duration > 0)
            sampleDuration = ((sampleCount)mScs[s]->m_stream->duration * mScs[s]->m_stream->time_base.num) *mScs[s]->m_stream->codec->sample_rate / mScs[s]->m_stream->time_base.den;
         else
            sampleDuration = ((sampleCount)mFormatContext->duration *mScs[s]->m_stream->codec->sample_rate) / AV_TIME_BASE;

         //      printf(" OD duration samples %qi, sr %d, secs %d\n",sampleDuration, (int)mScs[s]->m_stream->codec->sample_rate,(int)sampleDuration/mScs[s]->m_stream->codec->sample_rate);
         
         //for each wavetrack within the stream add coded blockfiles
         for (int c = 0; c < mScs[s]->m_stream->codec->channels; c++) {
            WaveTrack *t = mChannels[s][c];
            odTask->AddWaveTrack(t);
         
            sampleCount maxBlockSize = t->GetMaxBlockSize();
            //use the maximum blockfile size to divide the sections (about 11secs per blockfile at 44.1khz)
            for (sampleCount i = 0; i < sampleDuration; i += maxBlockSize) {
               sampleCount blockLen = maxBlockSize;
               if (i + blockLen > sampleDuration)
                  blockLen = sampleDuration - i;
            
               t->AppendCoded(mFilename, i, blockLen, c,ODTask::eODFFMPEG);
            
               // This only works well for single streams since we assume 
               // each stream is of the same duration and channels
               res = mProgress->Update(i+sampleDuration*c+ sampleDuration*mScs[s]->m_stream->codec->channels*s, 
                                       sampleDuration*mScs[s]->m_stream->codec->channels*mNumStreams);
               if (res != eProgressSuccess)
                  break;
            }
         }
         tasks.push_back(odTask);
      }
      //Now we add the tasks and let them run, or delete them if the user cancelled
      for(int i=0; i < (int)tasks.size(); i++) {
         if(res==eProgressSuccess)
            ODManager::Instance()->AddNewTask(tasks[i]);
         else
            {
               delete tasks[i];
            }
      }
   } else {
#endif
   streamContext *sc = NULL;

   // Read next frame.
   while ((sc = ReadNextFrame()) != NULL && (res == eProgressSuccess))
   {
      // ReadNextFrame returns 1 if stream is not to be imported
      if (sc != (streamContext*)1)
      {
         // Decode frame until it is not possible to decode any further
         while (sc->m_pktRemainingSiz > 0 && (res == eProgressSuccess || res == eProgressStopped))
开发者ID:tuanmasterit,项目名称:audacity,代码行数:67,代码来源:ImportFFmpeg.cpp


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