Exemplos de MediaResource::GetNextCachedData em C++ (Cpp)

Exemplo n.º 1

nsresult MediaOmxReader::GetBuffered(mozilla::dom::TimeRanges* aBuffered, int64_t aStartTime)
{
  if (!mOmxDecoder.get())
    return NS_OK;

  MediaResource* stream = mOmxDecoder->GetResource();

  int64_t durationUs = 0;
  mOmxDecoder->GetDuration(&durationUs);

  // Nothing to cache if the media takes 0us to play.
  if (!durationUs)
    return NS_OK;

  // Special case completely cached files.  This also handles local files.
  if (stream->IsDataCachedToEndOfResource(0)) {
    aBuffered->Add(0, durationUs);
    return NS_OK;
  }

  int64_t totalBytes = stream->GetLength();

  // If we can't determine the total size, pretend that we have nothing
  // buffered. This will put us in a state of eternally-low-on-undecoded-data
  // which is not get, but about the best we can do.
  if (totalBytes == -1)
    return NS_OK;

  int64_t startOffset = stream->GetNextCachedData(0);
  while (startOffset >= 0) {
    int64_t endOffset = stream->GetCachedDataEnd(startOffset);
    // Bytes [startOffset..endOffset] are cached.
    NS_ASSERTION(startOffset >= 0, "Integer underflow in GetBuffered");
    NS_ASSERTION(endOffset >= 0, "Integer underflow in GetBuffered");

    uint64_t startUs = BytesToTime(startOffset, totalBytes, durationUs);
    uint64_t endUs = BytesToTime(endOffset, totalBytes, durationUs);
    if (startUs != endUs) {
      aBuffered->Add((double)startUs / USECS_PER_S, (double)endUs / USECS_PER_S);
    }
    startOffset = stream->GetNextCachedData(endOffset);
  }
  return NS_OK;
}