/// <summary>Add an existing wave audio stream to the file</summary> /// <param name="waveData">The new stream's data</param> /// <param name="streamInfo">Header info for the new stream</param> /// <param name="streamFormat">The new stream' format info</param> /// <param name="streamLength">Length of the new stream</param> public void AddAudioStream(IntPtr waveData, Avi.AVISTREAMINFO streamInfo, Avi.PCMWAVEFORMAT streamFormat, int streamLength) { IntPtr aviStream; int result = Avi.AVIFileCreateStream(aviFile, out aviStream, ref streamInfo); if (result != 0) { throw new Exception("Exception in AVIFileCreateStream: " + result.ToString()); } result = Avi.AVIStreamSetFormat(aviStream, 0, ref streamFormat, Marshal.SizeOf(streamFormat)); if (result != 0) { throw new Exception("Exception in AVIStreamSetFormat: " + result.ToString()); } result = Avi.AVIStreamWrite(aviStream, 0, streamLength, waveData, streamLength, Avi.AVIIF_KEYFRAME, 0, 0); if (result != 0) { throw new Exception("Exception in AVIStreamWrite: " + result.ToString()); } result = Avi.AVIStreamRelease(aviStream); if (result != 0) { throw new Exception("Exception in AVIStreamRelease: " + result.ToString()); } }
/// <summary>Create a new stream</summary> private void CreateStreamWithoutFormat() { int scale = 1; double rate = FrameRate; GetRateAndScale(ref rate, ref scale); Avi.AVISTREAMINFO strhdr = new Avi.AVISTREAMINFO { fccType = Avi.mmioStringToFOURCC("vids", 0), fccHandler = Avi.mmioStringToFOURCC("CVID", 0), dwFlags = 0, dwCaps = 0, wPriority = 0, wLanguage = 0, dwScale = scale, dwRate = (int)rate, dwStart = 0, dwLength = 0, dwInitialFrames = 0, dwSuggestedBufferSize = FrameSize, dwQuality = -1, dwSampleSize = 0, rcFrame = { top = 0, left = 0, bottom = (uint)Height, right = (uint)Width }, dwEditCount = 0, dwFormatChangeCount = 0, szName = new UInt16[64] }; int result = Avi.AVIFileCreateStream(aviFile, out aviStream, ref strhdr); if (result != 0) { throw new Exception("Exception in AVIFileCreateStream: " + result); } }
/// <summary>Copy a piece of video and wave sound int a new file</summary> /// <param name="newFileName">File name</param> /// <param name="startAtSecond">Start copying at second x</param> /// <param name="stopAtSecond">Stop copying at second y</param> /// <returns>AviManager for the new video</returns> public AviManager CopyTo(String newFileName, float startAtSecond, float stopAtSecond) { AviManager newFile = new AviManager(newFileName, false); try { //copy video stream VideoStream videoStream = GetVideoStream(); int startFrameIndex = (int)(videoStream.FrameRate * startAtSecond); int stopFrameIndex = (int)(videoStream.FrameRate * stopAtSecond); videoStream.GetFrameOpen(); Bitmap bmp = videoStream.GetBitmap(startFrameIndex); VideoStream newStream = newFile.AddVideoStream(false, videoStream.FrameRate, bmp); for (int n = startFrameIndex + 1; n <= stopFrameIndex; n++) { bmp = videoStream.GetBitmap(n); newStream.AddFrame(bmp); } videoStream.GetFrameClose(); //copy audio stream AudioStream waveStream = GetWaveStream(); Avi.AVISTREAMINFO streamInfo = new Avi.AVISTREAMINFO(); Avi.PCMWAVEFORMAT streamFormat = new Avi.PCMWAVEFORMAT(); int streamLength = 0; IntPtr ptrRawData = waveStream.GetStreamData( ref streamInfo, ref streamFormat, ref streamLength); int startByteIndex = (int)(startAtSecond * (float)(waveStream.CountSamplesPerSecond * streamFormat.nChannels * waveStream.CountBitsPerSample) / 8); int stopByteIndex = (int)(stopAtSecond * (float)(waveStream.CountSamplesPerSecond * streamFormat.nChannels * waveStream.CountBitsPerSample) / 8); IntPtr ptrWavePart = new IntPtr(ptrRawData.ToInt32() + startByteIndex); byte[] rawData = new byte[stopByteIndex - startByteIndex]; Marshal.Copy(ptrWavePart, rawData, 0, rawData.Length); Marshal.FreeHGlobal(ptrRawData); streamInfo.dwLength = rawData.Length; streamInfo.dwStart = 0; IntPtr unmanagedRawData = Marshal.AllocHGlobal(rawData.Length); Marshal.Copy(rawData, 0, unmanagedRawData, rawData.Length); newFile.AddAudioStream(unmanagedRawData, streamInfo, streamFormat, rawData.Length); Marshal.FreeHGlobal(unmanagedRawData); } catch (Exception ex) { newFile.Close(); throw ex; } return(newFile); }
/// <summary>Change the AviStreamInfo values and update the frame rate</summary> /// <param name="info"></param> public void SetInfo(Avi.AVISTREAMINFO info) { int result = Avi.EditStreamSetInfo(editableStream, ref info, Marshal.SizeOf(info)); if (result != 0) { throw new Exception("Exception in SetInfo: " + result); } FrameRate = info.dwRate / info.dwScale; }
/// <summary>Read the stream's header information</summary> /// <param name="aviStream">The IAVISTREAM to read from</param> /// <returns>AVISTREAMINFO</returns> private Avi.AVISTREAMINFO GetStreamInfo(IntPtr aviStream) { Avi.AVISTREAMINFO streamInfo = new Avi.AVISTREAMINFO(); int result = Avi.AVIStreamInfo(aviStream, ref streamInfo, Marshal.SizeOf(streamInfo)); if (result != 0) { throw new Exception("Exception in AVIStreamInfo: " + result); } return(streamInfo); }
/// <summary>Add an existing wave audio stream to the file</summary> /// <param name="newStream">The stream to add</param> /// <param name="startAtFrameIndex"> /// The index of the video frame at which the sound is going to start. /// '0' inserts the sound at the beginning of the video. /// </param> public void AddAudioStream(AudioStream newStream, int startAtFrameIndex) { Avi.AVISTREAMINFO streamInfo = new Avi.AVISTREAMINFO(); Avi.PCMWAVEFORMAT streamFormat = new Avi.PCMWAVEFORMAT(); int streamLength = 0; IntPtr rawData = newStream.GetStreamData(ref streamInfo, ref streamFormat, ref streamLength); IntPtr waveData = rawData; if (startAtFrameIndex > 0) { //not supported //streamInfo.dwStart = startAtFrameIndex; double framesPerSecond = GetVideoStream().FrameRate; double samplesPerSecond = newStream.CountSamplesPerSecond; double startAtSecond = startAtFrameIndex / framesPerSecond; int startAtSample = (int)(samplesPerSecond * startAtSecond); waveData = InsertSilence(startAtSample - 1, waveData, streamLength, ref streamInfo); } IntPtr aviStream; int result = Avi.AVIFileCreateStream(aviFile, out aviStream, ref streamInfo); if (result != 0) { throw new Exception("Exception in AVIFileCreateStream: " + result.ToString()); } result = Avi.AVIStreamSetFormat(aviStream, 0, ref streamFormat, Marshal.SizeOf(streamFormat)); if (result != 0) { throw new Exception("Exception in AVIStreamSetFormat: " + result.ToString()); } result = Avi.AVIStreamWrite(aviStream, 0, streamLength, waveData, streamLength, Avi.AVIIF_KEYFRAME, 0, 0); if (result != 0) { throw new Exception("Exception in AVIStreamWrite: " + result.ToString()); } result = Avi.AVIStreamRelease(aviStream); if (result != 0) { throw new Exception("Exception in AVIStreamRelease: " + result.ToString()); } Marshal.FreeHGlobal(waveData); }
/// <summary>Returns all data needed to copy the stream</summary> /// <remarks>Do not forget to call Marshal.FreeHGlobal and release the raw data pointer</remarks> /// <param name="streamInfo">Receives the header information</param> /// <param name="format">Receives the format</param> /// <param name="streamLength">Receives the length of the stream</param> /// <returns>Pointer to the wave data</returns> public IntPtr GetStreamData(ref Avi.AVISTREAMINFO streamInfo, ref Avi.PCMWAVEFORMAT format, ref int streamLength) { streamInfo = GetStreamInfo(); format = GetFormat(); //length in bytes = length in samples * length of a sample streamLength = Avi.AVIStreamLength(aviStream.ToInt32()) * streamInfo.dwSampleSize; IntPtr waveData = Marshal.AllocHGlobal(streamLength); int result = Avi.AVIStreamRead(aviStream, 0, streamLength, waveData, streamLength, 0, 0); if (result != 0) { throw new Exception("Exception in AVIStreamRead: " + result); } return(waveData); }
/// <summary>Initialize a VideoStream for an existing stream</summary> /// <param name="aviFile">The file that contains the stream</param> /// <param name="aviStream">An IAVISTREAM from [aviFile]</param> public VideoStream(int aviFile, IntPtr aviStream) { this.aviFile = aviFile; this.aviStream = aviStream; Avi.BITMAPINFOHEADER bih = new Avi.BITMAPINFOHEADER(); int size = Marshal.SizeOf(bih); Avi.AVIStreamReadFormat(aviStream, 0, ref bih, ref size); Avi.AVISTREAMINFO streamInfo = GetStreamInfo(aviStream); FrameRate = (float)streamInfo.dwRate / (float)streamInfo.dwScale; Width = (int)streamInfo.rcFrame.right; Height = (int)streamInfo.rcFrame.bottom; FrameSize = bih.biSizeImage; CountBitsPerPixel = bih.biBitCount; FirstFrame = Avi.AVIStreamStart(aviStream.ToInt32()); CountFrames = Avi.AVIStreamLength(aviStream.ToInt32()); }
private IntPtr InsertSilence(int countSilentSamples, IntPtr waveData, int lengthWave, ref Avi.AVISTREAMINFO streamInfo) { //initialize silence int lengthSilence = countSilentSamples * streamInfo.dwSampleSize; byte[] silence = new byte[lengthSilence]; //initialize new sound int lengthNewStream = lengthSilence + lengthWave; IntPtr newWaveData = Marshal.AllocHGlobal(lengthNewStream); //copy silence Marshal.Copy(silence, 0, newWaveData, lengthSilence); //copy sound byte[] sound = new byte[lengthWave]; Marshal.Copy(waveData, sound, 0, lengthWave); IntPtr startOfSound = new IntPtr(newWaveData.ToInt32() + lengthSilence); Marshal.Copy(sound, 0, startOfSound, lengthWave); Marshal.FreeHGlobal(newWaveData); streamInfo.dwLength = lengthNewStream; return(newWaveData); }