Method EncodeAudioFrame

modules/import-export/mod-ffmpeg/ExportFFmpeg.cpp:1549–1587

All paths in this that fail must report their error to the user.

// All paths in this that fail must report their error to the user.
bool FFmpegExporter::EncodeAudioFrame(int16_t *pFrame, size_t numSamples)
{
   const auto frameSize = numSamples * sizeof(int16_t) *  mChannels;
   int nBytesToWrite = 0;
   uint8_t *pRawSamples = nullptr;
   int nAudioFrameSizeOut = mDefaultFrameSize * mEncAudioCodecCtx->GetChannels() * sizeof(int16_t);
   int ret;

   nBytesToWrite = frameSize;
   pRawSamples  = (uint8_t*)pFrame;

   // Put the raw audio samples into the FIFO.
   ret = mEncAudioFifo->Write(pRawSamples, nBytesToWrite);

   if (ret != nBytesToWrite) {
      throw ExportErrorException("FFmpeg:913");
   }

   if (nAudioFrameSizeOut > mEncAudioFifoOutBufSize) {
      throw ExportException(_("FFmpeg : ERROR - nAudioFrameSizeOut too large."));
   }

   // Read raw audio samples out of the FIFO in nAudioFrameSizeOut byte-sized groups to encode.
   while (mEncAudioFifo->GetAvailable() >= nAudioFrameSizeOut)
   {
      mEncAudioFifo->Read(
         mEncAudioFifoOutBuf.data(), nAudioFrameSizeOut);

      std::unique_ptr<AVPacketWrapper> pkt = mFFmpeg->CreateAVPacketWrapper();

      ret = EncodeAudio(*pkt,                       // out
         mEncAudioFifoOutBuf.data(), // in
         mDefaultFrameSize);

      if (ret < 0)
         return false;
   }
   return true;
}

FFmpegExportProcessor::FFmpegExportProcessor(std::shared_ptr<FFmpegFunctions> ffmpeg, int subformat )
   : mFFmpeg(std::move(ffmpeg))