private void ParseForMp3Frames(Stream stream, bool enableSeeking) { Mp3Frame frame = null; long offsetOfFirstFrame = 0; stream = new BufferedStream(stream); if (enableSeeking) { while (ID3v2.SkipTag(stream)) { /* skip all id3 tags (see https://github.com/filoe/cscore/issues/63) * there are some files with multiple id3v2 tags * not sure whether this is according to the id3 specification but we have to handle it anyway * as long as the SkipTag method returns true, another id3 tag has been found */ } } while (frame == null) { if (enableSeeking && stream.IsEndOfStream()) { break; } if (enableSeeking) { offsetOfFirstFrame = stream.Position; } frame = Mp3Frame.FromStream(stream); } if (frame == null) { throw new Exception("Could not find any MP3-Frames in the stream."); } if (enableSeeking) { XingHeader xingHeader = XingHeader.FromFrame(frame); if (xingHeader != null) { offsetOfFirstFrame = stream.Position; } } _inputFormat = new Mp3Format(frame.SampleRate, frame.ChannelCount, frame.FrameLength, frame.BitRate); //Prescan stream if (enableSeeking) { _frameInfoCollection = new FrameInfoCollection(); while (_frameInfoCollection.AddFromMp3Stream(stream)) { } stream.Position = offsetOfFirstFrame; } }
/// <summary> /// Disposes the <see cref="DmoMp3Decoder"/>. /// </summary> /// <param name="disposing">True to release both managed and unmanaged resources; false to release only unmanaged resources.</param> protected override void Dispose(bool disposing) { base.Dispose(disposing); if (_comObj != null) { Marshal.ReleaseComObject(_comObj); _comObj = null; } if (_frameInfoCollection != null) { _frameInfoCollection.Dispose(); _frameInfoCollection = null; } if (_stream != null && _closeStream) { _stream.Dispose(); _stream = null; } }