/// <summary> /// Callback which handles setting up an MSS once the first MpegFrame after Id3v2 data has been read. /// </summary> /// <param name="mpegLayer3Frame"> First MpegFrame</param> /// <param name="mediaStreamAttributes">Empty dictionary for MediaStreamAttributes</param> /// <param name="mediaStreamDescriptions">Empty dictionary for MediaStreamDescriptions</param> /// <param name="mediaSourceAttributes">Empty dictionary for MediaSourceAttributes</param> private void ReadPastId3v2TagsCallback( MpegFrame mpegLayer3Frame, Dictionary<MediaStreamAttributeKeys, string> mediaStreamAttributes, List<MediaStreamDescription> mediaStreamDescriptions, Dictionary<MediaSourceAttributesKeys, string> mediaSourceAttributes) { if (mpegLayer3Frame.FrameSize <= 0) { throw new InvalidOperationException("MpegFrame's FrameSize cannot be negative"); } // Initialize the Mp3 data structures used by the Media pipeline with state from the first frame. WaveFormatExtensible wfx = new WaveFormatExtensible(); this.MpegLayer3WaveFormat = new MpegLayer3WaveFormat(); this.MpegLayer3WaveFormat.WaveFormatExtensible = wfx; this.MpegLayer3WaveFormat.WaveFormatExtensible.FormatTag = 85; this.MpegLayer3WaveFormat.WaveFormatExtensible.Channels = (short)((mpegLayer3Frame.Channels == Channel.SingleChannel) ? 1 : 2); this.MpegLayer3WaveFormat.WaveFormatExtensible.SamplesPerSec = mpegLayer3Frame.SamplingRate; this.MpegLayer3WaveFormat.WaveFormatExtensible.AverageBytesPerSecond = mpegLayer3Frame.Bitrate / 8; this.MpegLayer3WaveFormat.WaveFormatExtensible.BlockAlign = 1; this.MpegLayer3WaveFormat.WaveFormatExtensible.BitsPerSample = 0; this.MpegLayer3WaveFormat.WaveFormatExtensible.ExtraDataSize = 12; this.MpegLayer3WaveFormat.Id = 1; this.MpegLayer3WaveFormat.BitratePaddingMode = 0; this.MpegLayer3WaveFormat.FramesPerBlock = 1; this.MpegLayer3WaveFormat.BlockSize = (short)mpegLayer3Frame.FrameSize; this.MpegLayer3WaveFormat.CodecDelay = 0; mediaStreamAttributes[MediaStreamAttributeKeys.CodecPrivateData] = this.MpegLayer3WaveFormat.ToHexString(); this.audioStreamDescription = new MediaStreamDescription(MediaStreamType.Audio, mediaStreamAttributes); mediaStreamDescriptions.Add(this.audioStreamDescription); this.trackDuration = new TimeSpan(0, 0, (int)(this.audioStreamLength / MpegLayer3WaveFormat.WaveFormatExtensible.AverageBytesPerSecond)); mediaSourceAttributes[MediaSourceAttributesKeys.Duration] = this.trackDuration.Ticks.ToString(CultureInfo.InvariantCulture); if (this.audioStream.CanSeek) { mediaSourceAttributes[MediaSourceAttributesKeys.CanSeek] = "1"; } else { mediaSourceAttributes[MediaSourceAttributesKeys.CanSeek] = "0"; } // Report that the Mp3MediaStreamSource has finished initializing its internal state and can now // pass in Mp3 Samples. this.ReportOpenMediaCompleted(mediaSourceAttributes, mediaStreamDescriptions); this.currentFrame = mpegLayer3Frame; this.currentFrameStartPosition = MpegFrame.FrameHeaderSize; }
public void SetupTests() { this.wfx = new WaveFormatExtensible(); this.wfx.FormatTag = 85; this.wfx.Channels = 2; this.wfx.SamplesPerSec = 8000; this.wfx.AverageBytesPerSecond = 500; this.wfx.BlockAlign = 1; this.wfx.BitsPerSample = 16; this.wfx.ExtraDataSize = 12; this.mp3wfx = new MpegLayer3WaveFormat(); }