mirror of
https://github.com/ShareX/ShareX.git
synced 2024-08-18 19:51:39 +12:00
472 lines
No EOL
16 KiB
C#
472 lines
No EOL
16 KiB
C#
#region License Information (GPL v3)
|
|
|
|
/*
|
|
ShareX - A program that allows you to take screenshots and share any file type
|
|
Copyright (C) 2008-2014 ShareX Developers
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
|
Optionally you can also view the license at <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#endregion License Information (GPL v3)
|
|
|
|
// AForge Video for Windows Library
|
|
// AForge.NET framework
|
|
// http://www.aforgenet.com/framework/
|
|
//
|
|
// Copyright © AForge.NET, 2007-2011
|
|
// contacts@aforgenet.com
|
|
|
|
using System;
|
|
using System.Drawing;
|
|
using System.Drawing.Imaging;
|
|
using System.IO;
|
|
using System.Runtime.InteropServices;
|
|
|
|
namespace HelpersLib
|
|
{
|
|
/// <summary>
|
|
/// AVI files writing using Video for Windows interface.
|
|
/// </summary>
|
|
///
|
|
/// <remarks><para>The class allows to write AVI files using Video for Windows API.</para>
|
|
///
|
|
/// <para>Sample usage:</para>
|
|
/// <code>
|
|
/// // instantiate AVI writer, use WMV3 codec
|
|
/// AVIWriter writer = new AVIWriter( "wmv3" );
|
|
/// // create new AVI file and open it
|
|
/// writer.Open( "test.avi", 320, 240 );
|
|
/// // create frame image
|
|
/// Bitmap image = new Bitmap( 320, 240 );
|
|
///
|
|
/// for ( int i = 0; i < 240; i++ )
|
|
/// {
|
|
/// // update image
|
|
/// image.SetPixel( i, i, Color.Red );
|
|
/// // add the image as a new frame of video file
|
|
/// writer.AddFrame( image );
|
|
/// }
|
|
/// writer.Close( );
|
|
/// </code>
|
|
/// </remarks>
|
|
public class AVIWriter : IDisposable
|
|
{
|
|
// AVI file
|
|
private IntPtr file;
|
|
// video stream
|
|
private IntPtr stream;
|
|
// compressed stream
|
|
private IntPtr streamCompressed;
|
|
// buffer
|
|
private IntPtr buffer = IntPtr.Zero;
|
|
|
|
// width of video frames
|
|
private int width;
|
|
// height of vide frames
|
|
private int height;
|
|
// length of one line
|
|
private int stride;
|
|
// quality
|
|
private int quality;
|
|
// frame rate
|
|
private int rate = 25;
|
|
// current position
|
|
private int position;
|
|
// codec used for video compression
|
|
private string codec = "DIB ";
|
|
|
|
// dummy object to lock for synchronization
|
|
private readonly object sync = new object();
|
|
|
|
/// <summary>
|
|
/// Width of video frames.
|
|
/// </summary>
|
|
///
|
|
/// <remarks><para>The property specifies the width of video frames, which are acceptable
|
|
/// by <see cref="AddFrame"/> method for saving, which is set in <see cref="Open"/>
|
|
/// method.</para></remarks>
|
|
public int Width
|
|
{
|
|
get
|
|
{
|
|
return (buffer != IntPtr.Zero) ? width : 0;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Height of video frames.
|
|
/// </summary>
|
|
///
|
|
/// <remarks><para>The property specifies the height of video frames, which are acceptable
|
|
/// by <see cref="AddFrame"/> method for saving, which is set in <see cref="Open"/>
|
|
/// method.</para></remarks>
|
|
public int Height
|
|
{
|
|
get
|
|
{
|
|
return (buffer != IntPtr.Zero) ? height : 0;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Current position in video stream.
|
|
/// </summary>
|
|
///
|
|
/// <remarks><para>The property tell current position in video stream, which actually equals
|
|
/// to the amount of frames added using <see cref="AddFrame"/> method.</para></remarks>
|
|
public int Position
|
|
{
|
|
get
|
|
{
|
|
return position;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Desired playing frame rate.
|
|
/// </summary>
|
|
///
|
|
/// <remarks><para>The property sets the video frame rate, which should be use during playing
|
|
/// of the video to be saved.</para>
|
|
///
|
|
/// <para><note>The property should be set befor opening new file to take effect.</note></para>
|
|
///
|
|
/// <para>Default frame rate is set to <b>25</b>.</para></remarks>
|
|
public int FrameRate
|
|
{
|
|
get
|
|
{
|
|
return rate;
|
|
}
|
|
set
|
|
{
|
|
rate = value;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Codec used for video compression.
|
|
/// </summary>
|
|
///
|
|
/// <remarks><para>The property sets the FOURCC code of video compression codec, which needs to
|
|
/// be used for video encoding.</para>
|
|
///
|
|
/// <para><note>The property should be set befor opening new file to take effect.</note></para>
|
|
///
|
|
/// <para>Default video codec is set <b>"DIB "</b>, which means no compression.</para></remarks>
|
|
public string Codec
|
|
{
|
|
get
|
|
{
|
|
return codec;
|
|
}
|
|
set
|
|
{
|
|
codec = value;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Compression video quality.
|
|
/// </summary>
|
|
///
|
|
/// <remarks><para>The property sets video quality used by codec in order to balance compression rate
|
|
/// and image quality. The quality is measured usually in the [0, 100] range.</para>
|
|
///
|
|
/// <para><note>The property should be set befor opening new file to take effect.</note></para>
|
|
///
|
|
/// <para>Default value is set to <b>-1</b> - default compression quality of the codec.</para></remarks>
|
|
public int Quality
|
|
{
|
|
get
|
|
{
|
|
return quality;
|
|
}
|
|
set
|
|
{
|
|
quality = value;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="AVIWriter"/> class.
|
|
/// </summary>
|
|
///
|
|
/// <remarks>Initializes Video for Windows library.</remarks>
|
|
public AVIWriter()
|
|
{
|
|
NativeMethods.AVIFileInit();
|
|
}
|
|
|
|
public AVIWriter(string output, int fps, int width, int height, bool showOptions = false)
|
|
: this()
|
|
{
|
|
FrameRate = fps;
|
|
Open(output, width, height, showOptions);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="AVIWriter"/> class.
|
|
/// </summary>
|
|
///
|
|
/// <param name="codec">Codec to use for compression.</param>
|
|
///
|
|
/// <remarks>Initializes Video for Windows library.</remarks>
|
|
public AVIWriter(string codec)
|
|
: this()
|
|
{
|
|
this.codec = codec;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Destroys the instance of the <see cref="AVIWriter"/> class.
|
|
/// </summary>
|
|
~AVIWriter()
|
|
{
|
|
Dispose(false);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Dispose the object.
|
|
/// </summary>
|
|
///
|
|
/// <remarks>Frees unmanaged resources used by the object. The object becomes unusable
|
|
/// after that.</remarks>
|
|
public void Dispose()
|
|
{
|
|
Dispose(true);
|
|
// remove me from the Finalization queue
|
|
GC.SuppressFinalize(this);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Dispose the object.
|
|
/// </summary>
|
|
///
|
|
/// <param name="disposing">Indicates if disposing was initiated manually.</param>
|
|
protected virtual void Dispose(bool disposing)
|
|
{
|
|
if (disposing)
|
|
{
|
|
// dispose managed resources
|
|
}
|
|
// close current AVI file if any opened and uninitialize AVI library
|
|
Close();
|
|
NativeMethods.AVIFileExit();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Create new AVI file and open it for writing.
|
|
/// </summary>
|
|
///
|
|
/// <param name="fileName">AVI file name to create.</param>
|
|
/// <param name="width">Video width.</param>
|
|
/// <param name="height">Video height.</param>
|
|
///
|
|
/// <remarks><para>The method opens (creates) a video files, configure video codec and prepares
|
|
/// the stream for saving video frames with a help of <see cref="AddFrame"/> method.</para></remarks>
|
|
///
|
|
/// <exception cref="System.IO.IOException">Failed opening the specified file.</exception>
|
|
/// <exception cref="VideoException">A error occurred while creating new video file. See exception message.</exception>
|
|
/// <exception cref="OutOfMemoryException">Insufficient memory for internal buffer.</exception>
|
|
/// <exception cref="ArgumentException">Video file resolution must be a multiple of two.</exception>
|
|
public void Open(string fileName, int width, int height, bool showOptions = false)
|
|
{
|
|
// close previous file
|
|
Close();
|
|
|
|
// check width and height
|
|
if (((width & 1) != 0) || ((height & 1) != 0))
|
|
{
|
|
throw new ArgumentException("Video file resolution must be a multiple of two.");
|
|
}
|
|
|
|
bool success = false;
|
|
|
|
try
|
|
{
|
|
lock (sync)
|
|
{
|
|
// calculate stride
|
|
stride = width * 3;
|
|
if ((stride % 4) != 0)
|
|
stride += (4 - stride % 4);
|
|
|
|
// create new file
|
|
if (NativeMethods.AVIFileOpen(out file, fileName, OpenFileMode.Create | OpenFileMode.Write, IntPtr.Zero) != 0)
|
|
throw new IOException("Failed opening the specified file.");
|
|
|
|
this.width = width;
|
|
this.height = height;
|
|
|
|
// describe new stream
|
|
AVISTREAMINFO info = new AVISTREAMINFO();
|
|
|
|
info.type = NativeMethods.mmioFOURCC("vids");
|
|
info.handler = NativeMethods.mmioFOURCC(codec);
|
|
info.scale = 1;
|
|
info.rate = rate;
|
|
info.suggestedBufferSize = stride * height;
|
|
|
|
// create stream
|
|
if (NativeMethods.AVIFileCreateStream(file, out stream, ref info) != 0)
|
|
throw new Exception("Failed creating stream.");
|
|
|
|
// describe compression options
|
|
AVICOMPRESSOPTIONS options = new AVICOMPRESSOPTIONS();
|
|
|
|
options.handler = NativeMethods.mmioFOURCC(codec);
|
|
options.quality = quality;
|
|
|
|
if (showOptions)
|
|
{
|
|
NativeMethods.AVISaveOptions(stream, ref options);
|
|
}
|
|
|
|
// create compressed stream
|
|
if (NativeMethods.AVIMakeCompressedStream(out streamCompressed, stream, ref options, IntPtr.Zero) != 0)
|
|
throw new Exception("Failed creating compressed stream.");
|
|
|
|
// describe frame format
|
|
BITMAPINFOHEADER bitmapInfoHeader = new BITMAPINFOHEADER();
|
|
|
|
bitmapInfoHeader.size = Marshal.SizeOf(bitmapInfoHeader.GetType());
|
|
bitmapInfoHeader.width = width;
|
|
bitmapInfoHeader.height = height;
|
|
bitmapInfoHeader.planes = 1;
|
|
bitmapInfoHeader.bitCount = 24;
|
|
bitmapInfoHeader.sizeImage = 0;
|
|
bitmapInfoHeader.compression = 0; // BI_RGB
|
|
|
|
// set frame format
|
|
if (NativeMethods.AVIStreamSetFormat(streamCompressed, 0, ref bitmapInfoHeader, Marshal.SizeOf(bitmapInfoHeader.GetType())) != 0)
|
|
throw new Exception("Failed setting format of the compressed stream.");
|
|
|
|
// alloc unmanaged memory for frame
|
|
buffer = Marshal.AllocHGlobal(stride * height);
|
|
|
|
if (buffer == IntPtr.Zero)
|
|
{
|
|
throw new OutOfMemoryException("Insufficient memory for internal buffer.");
|
|
}
|
|
|
|
position = 0;
|
|
success = true;
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
if (!success)
|
|
{
|
|
Close();
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Close video file.
|
|
/// </summary>
|
|
public void Close()
|
|
{
|
|
lock (sync)
|
|
{
|
|
// free unmanaged memory
|
|
if (buffer != IntPtr.Zero)
|
|
{
|
|
Marshal.FreeHGlobal(buffer);
|
|
buffer = IntPtr.Zero;
|
|
}
|
|
|
|
// release compressed stream
|
|
if (streamCompressed != IntPtr.Zero)
|
|
{
|
|
NativeMethods.AVIStreamRelease(streamCompressed);
|
|
streamCompressed = IntPtr.Zero;
|
|
}
|
|
|
|
// release stream
|
|
if (stream != IntPtr.Zero)
|
|
{
|
|
NativeMethods.AVIStreamRelease(stream);
|
|
stream = IntPtr.Zero;
|
|
}
|
|
|
|
// release file
|
|
if (file != IntPtr.Zero)
|
|
{
|
|
NativeMethods.AVIFileRelease(file);
|
|
file = IntPtr.Zero;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Add new frame to the AVI file.
|
|
/// </summary>
|
|
///
|
|
/// <param name="frameImage">New frame image.</param>
|
|
///
|
|
/// <remarks><para>The method adds new video frame to an opened video file. The width and heights
|
|
/// of the frame should be the same as it was specified in <see cref="Open"/> method
|
|
/// (see <see cref="Width"/> and <see cref="Height"/> properties).</para></remarks>
|
|
///
|
|
/// <exception cref="System.IO.IOException">Thrown if no video file was open.</exception>
|
|
/// <exception cref="ArgumentException">Bitmap size must be of the same as video size, which was specified on opening video file.</exception>
|
|
/// <exception cref="VideoException">A error occurred while writing new video frame. See exception message.</exception>
|
|
public void AddFrame(Bitmap frameImage)
|
|
{
|
|
lock (sync)
|
|
{
|
|
// check if AVI file was properly opened
|
|
if (buffer == IntPtr.Zero)
|
|
throw new IOException("AVI file should be successfully opened before writing.");
|
|
|
|
// check image dimension
|
|
if ((frameImage.Width != width) || (frameImage.Height != height))
|
|
throw new ArgumentException("Bitmap size must be of the same as video size, which was specified on opening video file.");
|
|
|
|
// lock bitmap data
|
|
BitmapData imageData = frameImage.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
|
|
|
|
// copy image data
|
|
int srcStride = imageData.Stride;
|
|
int dstStride = stride;
|
|
|
|
int src = imageData.Scan0.ToInt32() + srcStride * (height - 1);
|
|
int dst = buffer.ToInt32();
|
|
|
|
for (int y = 0; y < height; y++)
|
|
{
|
|
NativeMethods.memcpy(dst, src, dstStride);
|
|
dst += dstStride;
|
|
src -= srcStride;
|
|
}
|
|
|
|
// unlock bitmap data
|
|
frameImage.UnlockBits(imageData);
|
|
|
|
// write to stream
|
|
if (NativeMethods.AVIStreamWrite(streamCompressed, position, 1, buffer, stride * height, 0, IntPtr.Zero, IntPtr.Zero) != 0)
|
|
{
|
|
throw new Exception("Failed adding frame.");
|
|
}
|
|
|
|
position++;
|
|
}
|
|
}
|
|
}
|
|
} |