/// <summary>
/// Query media informations.
/// </summary>
/// <param name="stream">
/// A <see cref="Stream"/> where the media data is stored.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// A <see cref="ImageInfo"/> containing information about the specified media.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="stream"/> or <paramref name="criteria"/> is null.
/// </exception>
public ImageInfo QueryInfo(Stream stream, MediaCodecCriteria criteria)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (criteria == null)
{
throw new ArgumentNullException("criteria");
}
ImageInfo info = new ImageInfo();
using (System.Drawing.Bitmap iBitmap = new System.Drawing.Bitmap(stream)) {
PixelLayout iBitmapPixelType;
string containerFormat;
ConvertImageFormat(iBitmap.RawFormat, out containerFormat);
ConvertPixelFormat(iBitmap, out iBitmapPixelType);
info.ContainerFormat = containerFormat;
info.PixelType = iBitmapPixelType;
info.Width = (uint)iBitmap.Width;
info.Height = (uint)iBitmap.Height;
}
return(info);
}
/// <summary>
/// Save media to a <see cref="IO.Stream"/>.
/// </summary>
/// <param name="path">
/// A <see cref="String"/> that specify the file path where media data is stored.
/// </param>
/// <param name="media">
/// A <typeparamref name="TMedia"/> that holds the data to be stored.
/// </param>
/// <param name="format">
/// A <see cref="String"/> that specify the media format to used for saving <paramref name="media"/>.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an image stream.
/// </param>
/// <exception cref="ArgumentNullException">
/// This exception is thrown if at least one of the parameters <paramref name="path"/> or <paramref name="media"/>
/// is null.
/// </exception>
/// <exception cref="InvalidOperationException">
/// This exception is thrown if no plugin cannot save the image <paramref name="media"/> on <paramref name="path"/>.
/// </exception>
public void Save(string path, TMedia media, string format, MediaCodecCriteria criteria)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
if (media == null)
{
throw new ArgumentNullException("media");
}
string tempMediaPath = Path.GetTempFileName();
bool alreadyExisting = File.Exists(path);
try {
// Save media (on temporary file)
using (FileStream fs = new FileStream(tempMediaPath, FileMode.Create, FileAccess.Write)) {
Save(fs, media, format, criteria);
}
// Place saved media
if (alreadyExisting)
{
File.Copy(tempMediaPath, path, true); // Copy existing file (overwriting)
}
else
{
File.Move(tempMediaPath, path); // Move temporary file
}
} catch {
File.Delete(tempMediaPath);
throw;
}
}
/// <summary>
/// Load media from stream.
/// </summary>
/// <param name="stream">
/// A <see cref="Stream"/> where the media data is stored.
/// </param>
/// <param name="format">
/// The <see cref="String"/> which defines the format of the stream data.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// An <typeparamref name="TMedia"/> holding the media data.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="stream"/> or <paramref name="criteria"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="stream"/> is not readable or seekable.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Exception thrown if no plugin is available for <paramref name="format"/> (filtered by
/// <paramref name="criteria"/>) or all plugins are not able to load media from
/// <paramref name="stream"/>.
/// </exception>
/// <exception cref="NotSupportedException">
/// Exception thrown if <paramref name="format"/> is not supported by any loaded plugin.
/// </exception>
public override Image Load(Stream stream, string format, MediaCodecCriteria criteria)
{
// Base implementation
Image image = base.Load(stream, format, criteria);
// Fix container format in MediaInformation
image.MediaInformation.ContainerFormat = format;
return(image);
}
/// <summary>
/// Load media from a local file.
/// </summary>
/// <param name="uri">
/// A <see cref="String"/> that specify the resource path where the media data is stored.
/// </param>
/// <param name="format">
/// The <see cref="String"/> which defines the format of the stream data.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// An <typeparamref name="TMedia"/> holding the media data.
/// </returns>
public TMedia Load(string uri, string format, MediaCodecCriteria criteria)
{
if (uri == null)
{
throw new ArgumentNullException("uri");
}
using (MediaStream ms = new MediaStream(uri, FileMode.Open, FileAccess.Read)) {
return(Load(ms, format, criteria));
}
}
/// <summary>
/// Query media informations.
/// </summary>
/// <param name="path">
/// A <see cref="String"/> that specify the file path where media data is stored.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// A <typeparamref name="TMediaInfo"/> containing information about the specified media.
/// </returns>
public TMediaInfo QueryInfo(string path, MediaCodecCriteria criteria)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
if (criteria == null)
{
throw new ArgumentNullException("criteria");
}
using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read)) {
return(QueryInfo(fs, criteria));
}
}
/// <summary>
/// Query media informations.
/// </summary>
/// <param name="stream">
/// A <see cref="Stream"/> where the media data is stored.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// A <typeparamref name="TMediaInfo"/> containing information about the specified media.
/// </returns>
public TMediaInfo QueryInfo(Stream stream, MediaCodecCriteria criteria)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (stream.CanRead == false)
{
throw new ArgumentException(String.Format("unable to read from stream"));
}
if (stream.CanSeek == false)
{
throw new ArgumentException(String.Format("stream is not seekable"));
}
if (criteria == null)
{
throw new ArgumentNullException("criteria");
}
List <TPlugin> supportedPlugins = Plugins;
// Class filtering
if (supportedPlugins != null)
{
supportedPlugins = FilterReadPlugins(supportedPlugins, criteria);
}
if (supportedPlugins == null)
{
throw new InvalidOperationException("no plugin available");
}
foreach (TPlugin plugin in supportedPlugins)
{
try {
// Rewind stream
if (stream.CanSeek)
{
stream.Seek(0, SeekOrigin.Begin);
}
// Try to get information
return(plugin.QueryInfo(stream, criteria));
} catch {
}
}
// Don't returns not assigned information
throw new InvalidOperationException(String.Format("no plugin can query information on media"));
}
/// <summary>
/// Load media from a local file.
/// </summary>
/// <param name="uri">
/// A <see cref="String"/> that specify the resource path where the media data is stored.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// An <typeparamref name="TMedia"/> holding the media data.
/// </returns>
/// <exception cref="InvalidOperationException">
/// Eception thrown if no media plugin can open <paramref name="uri"/>.
/// </exception>
public TMedia Load(string uri, MediaCodecCriteria criteria)
{
if (uri == null)
{
throw new ArgumentNullException("uri");
}
foreach (string format in GetFormatsFromUrl(uri))
{
using (MediaStream ms = new MediaStream(uri, FileMode.Open, FileAccess.Read)) {
return(Load(ms, format, criteria));
}
}
throw new InvalidOperationException(String.Format("no format recognized from URI \"{0}\"", uri));
}
/// <summary>
/// Query media informations.
/// </summary>
/// <param name="uri">
/// A <see cref="Uri"/> that specify the resource location where media data is stored.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// A <typeparamref name="TMediaInfo"/> containing information about the specified media.
/// </returns>
public TMediaInfo QueryInfo(Uri uri, MediaCodecCriteria criteria)
{
if (uri == null)
{
throw new ArgumentNullException("uri");
}
if (criteria == null)
{
throw new ArgumentNullException("criteria");
}
string localPath = GetLocalUriPath(uri);
using (FileStream fs = new FileStream(localPath, FileMode.Open, FileAccess.Read)) {
return(QueryInfo(fs, criteria));
}
}
/// <summary>
/// Filters the plugins (used for reading) by criteria.
/// </summary>
/// <returns>
/// The read plugins.
/// </returns>
/// <param name='plugins'>
/// The actual plugin list.
/// </param>
/// <param name='criteria'>
/// Criteria.
/// </param>
/// <exception cref='ArgumentNullException'>
/// Is thrown when an argument passed to a method is invalid because it is <see langword="null" /> .
/// </exception>
protected virtual List <TPlugin> FilterWritePlugins(List <TPlugin> plugins, MediaCodecCriteria criteria)
{
if (plugins == null)
{
throw new ArgumentNullException("plugins");
}
if (criteria == null)
{
throw new ArgumentNullException("criteria");
}
// Criteria: PluginName
if (criteria.IsDefined(PluginName))
{
plugins = plugins.FindAll(delegate(TPlugin obj) {
return(obj.Name == (string)criteria[PluginName]);
});
}
return(plugins);
}
/// <summary>
/// Load media from stream.
/// </summary>
/// <param name="stream">
/// A <see cref="Stream"/> where the media data is stored.
/// </param>
/// <param name="format">
/// The <see cref="String"/> which defines the format of the stream data.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// An <typeparamref name="TMedia"/> holding the media data.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="stream"/> or <paramref name="criteria"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="stream"/> is not readable or seekable.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Exception thrown if no plugin is available for <paramref name="format"/> (filtered by
/// <paramref name="criteria"/>) or all plugins are not able to load media from
/// <paramref name="stream"/>.
/// </exception>
/// <exception cref="NotSupportedException">
/// Exception thrown if <paramref name="format"/> is not supported by any loaded plugin.
/// </exception>
public virtual TMedia Load(Stream stream, string format, MediaCodecCriteria criteria)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (criteria == null)
{
throw new ArgumentNullException("criteria");
}
if (stream.CanRead == false)
{
throw new ArgumentException("unable to read from stream");
}
List <TPlugin> supportedPlugins = Plugins;
// Format filtering
if (supportedPlugins != null)
{
supportedPlugins = FilterReadPlugins(supportedPlugins, format);
}
if ((supportedPlugins == null) || (supportedPlugins.Count == 0))
{
throw new NotSupportedException(String.Format("format {0} is not supported", format));
}
// Class filtering
supportedPlugins = FilterReadPlugins(supportedPlugins, criteria);
if ((supportedPlugins == null) || (supportedPlugins.Count == 0))
{
throw new InvalidOperationException("no plugin available");
}
StringBuilder exceptionMessage = new StringBuilder();
foreach (TPlugin plugin in supportedPlugins)
{
try {
// Rewind stream
if (stream.CanSeek)
{
stream.Seek(0, SeekOrigin.Begin);
}
// Try to get information
return(plugin.Load(stream, criteria));
} catch (Exception exception) {
if (supportedPlugins.Count > 1)
{
exceptionMessage.AppendLine(String.Format("- '{0}' exception: {1};", plugin.Name, exception.Message));
continue;
}
throw new InvalidOperationException(String.Format("no plugin can load media: {0}", exception.Message));
}
}
// Remove trailing carriage return.
exceptionMessage = exceptionMessage.Remove(exceptionMessage.Length - 1, 1);
// Don't returns not assigned information
throw new InvalidOperationException(String.Format("no plugin can load media; the reasons are:\n{0}", exceptionMessage));
}
/// <summary>
/// Save media to a <see cref="IO.Stream"/>.
/// </summary>
/// <param name="stream">
/// A <see cref="IO.Stream"/> that stores the media data.
/// </param>
/// <param name="media">
/// A <typeparamref name="TMedia"/> that holds the data to be stored.
/// </param>
/// <param name="format">
/// A <see cref="String"/> that specify the media format to used for saving <paramref name="media"/>.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an image stream.
/// </param>
/// <exception cref="ArgumentNullException">
/// This exception is thrown if at least one of the parameters <paramref name="stream"/> or <paramref name="media"/>
/// is null.
/// </exception>
/// <exception cref="ArgumentException">
/// This exception is thrown if <paramref name="stream"/> cannot be seek or cannot be written.
/// </exception>
/// <exception cref="InvalidOperationException">
/// This exception is thrown if no plugin cannot save the media <paramref name="media"/> on the stream <paramref name="stream"/>.
/// </exception>
public void Save(Stream stream, TMedia media, string format, MediaCodecCriteria criteria)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (media == null)
{
throw new ArgumentNullException("media");
}
if (stream.CanWrite == false)
{
throw new ArgumentException(String.Format("unable to write to stream"));
}
if (stream.CanSeek == false)
{
throw new ArgumentException(String.Format("unable to seek on stream"));
}
List <TPlugin> supportedPlugins = Plugins;
// Format filtering
if (supportedPlugins != null)
{
supportedPlugins = FilterWritePlugins(supportedPlugins, format);
}
if (supportedPlugins == null)
{
throw new NotSupportedException(String.Format("format {0} is not supported", format));
}
// Class filtering
if (criteria != null)
{
supportedPlugins = FilterWritePlugins(supportedPlugins, criteria);
}
if (supportedPlugins == null)
{
throw new InvalidOperationException("no plugin available");
}
StringBuilder pluginLog = new StringBuilder();
// Write image pixel data
foreach (TPlugin plugin in supportedPlugins)
{
try {
// Position file cursor at beginning
if (stream.CanSeek)
{
stream.Seek(0, SeekOrigin.Begin);
}
// Save image pixel data
plugin.Save(stream, media, format, criteria);
return;
} catch (Exception exception) {
pluginLog.AppendLine(String.Format("- Exception of plugin '{0}': {1}", plugin.Name, exception.Message));
}
}
throw new InvalidOperationException(String.Format("no plugin can save media. Detailed information:\n{0}", pluginLog));
}
/// <summary>
/// Save media to stream.
/// </summary>
/// <param name="stream">
/// A <see cref="IO.Stream"/> which stores the media data.
/// </param>
/// <param name="image">
/// A <see cref="Image"/> holding the data to be stored.
/// </param>
/// <param name="format">
/// A <see cref="String"/> that specify the media format to used for saving <paramref name="image"/>.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an image stream.
/// </param>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="stream"/>, <paramref name="image"/> or <paramref name="criteria"/> is null.
/// </exception>
public void Save(Stream stream, Image image, string format, MediaCodecCriteria criteria)
{
Bitmap iBitmap;
System.Drawing.Imaging.ImageFormat iBitmapFormat;
System.Drawing.Imaging.PixelFormat iBitmapPixelFormat;
int iBitmapFlags;
ConvertImageFormat(format, out iBitmapFormat);
ConvertPixelFormat(image.PixelLayout, out iBitmapPixelFormat, out iBitmapFlags);
// Obtain source and destination data pointers
using (iBitmap = new Bitmap((int)image.Width, (int)image.Height, iBitmapPixelFormat)) {
BitmapData iBitmapData = null;
IntPtr imageData = image.ImageBuffer;
try {
iBitmapData = iBitmap.LockBits(new System.Drawing.Rectangle(0, 0, iBitmap.Width, iBitmap.Height), ImageLockMode.ReadOnly, iBitmap.PixelFormat);
// Copy Image data dst Bitmap
unsafe {
byte *hImageDataPtr = (byte *)imageData.ToPointer();
byte *iBitmapDataPtr = (byte *)iBitmapData.Scan0.ToPointer();
uint hImageDataStride = image.Stride;
uint iBitmapDataStride = (uint)iBitmapData.Stride;
// .NET Image Library stores bitmap scan line data in memory padded dst 4 bytes boundaries
// .NET Image Library expect a bottom up image, so invert the scan line order
iBitmapDataPtr = iBitmapDataPtr + ((image.Height - 1) * iBitmapDataStride);
for (uint line = 0; line < image.Height; line++, hImageDataPtr += hImageDataStride, iBitmapDataPtr -= iBitmapDataStride)
{
Memory.MemoryCopy(iBitmapDataPtr, hImageDataPtr, hImageDataStride);
}
}
} finally {
if (iBitmapData != null)
{
iBitmap.UnlockBits(iBitmapData);
}
}
// Save image with the specified format
ImageCodecInfo encoderInfo = Array.Find(ImageCodecInfo.GetImageEncoders(), delegate(ImageCodecInfo item) {
return(item.FormatID == iBitmapFormat.Guid);
});
EncoderParameters encoderParams = null;
try {
EncoderParameters encoderInfoParamList = iBitmap.GetEncoderParameterList(encoderInfo.Clsid);
EncoderParameter[] encoderInfoParams = encoderInfoParamList != null ? encoderInfoParamList.Param : null;
bool supportQuality = false;
int paramsCount = 0;
if (encoderInfoParams != null)
{
Array.ForEach(encoderInfoParams, delegate(EncoderParameter item) {
if (item.Encoder.Guid == Encoder.Quality.Guid)
{
supportQuality = true;
paramsCount++;
}
});
}
encoderParams = new EncoderParameters(paramsCount);
paramsCount = 0;
if (supportQuality)
{
encoderParams.Param[paramsCount++] = new EncoderParameter(Encoder.Quality, 100);
}
} catch (Exception) {
// Encoder does not support parameters
}
iBitmap.Save(stream, encoderInfo, encoderParams);
}
}
/// <summary>
/// Internal method for creating Image from Bitmap.
/// </summary>
/// <param name="bitmap">
/// A <see cref="Drawing.Bitmap"/> to be converted into an <see cref="Image"/> instance.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify image conversion criteria.
/// </param>
/// <returns>
/// It returns a <see cref="Image"/> instance that's equivalent to <paramref name="bitmap"/>.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="bitmap"/> or <see cref="criteria"/> is null.
/// </exception>
internal static Image LoadFromBitmap(System.Drawing.Bitmap bitmap, MediaCodecCriteria criteria)
{
if (bitmap == null)
{
throw new ArgumentNullException("bitmap");
}
if (criteria == null)
{
throw new ArgumentNullException("criteria");
}
PixelLayout pType, pConvType;
// Allocate image raster
ConvertPixelFormat(bitmap, out pType);
// Check for hardware/software support
if (Pixel.IsSupportedInternalFormat(pType) == false)
{
if (criteria.IsDefined(ImageCodecCriteria.SoftwareSupport) && ((bool)criteria[ImageCodecCriteria.SoftwareSupport]))
{
// Pixel type not directly supported by hardware... try to guess suitable software conversion
pConvType = Pixel.GuessBestSupportedConvertion(pType);
if (pConvType == PixelLayout.None)
{
throw new InvalidOperationException(String.Format("pixel type {0} is not supported by hardware neither software", pType));
}
}
else
{
throw new InvalidOperationException(String.Format("pixel type {0} is not supported by hardware", pType));
}
}
else
{
pConvType = pType;
}
Image image = new Image(pType, (uint)bitmap.Width, (uint)bitmap.Height);
switch (bitmap.PixelFormat)
{
case System.Drawing.Imaging.PixelFormat.Format1bppIndexed:
case System.Drawing.Imaging.PixelFormat.Format4bppIndexed:
case System.Drawing.Imaging.PixelFormat.Format8bppIndexed:
if (Runtime.RunningMono)
{
// Bug 676362 - Bitmap Clone does not format return image to requested PixelFormat
// https://bugzilla.novell.com/show_bug.cgi?id=676362
//
// ATM no mono version has resolved the bug; current workaround is performing image
// sampling pixel by pixel, using internal conversion routines, even if it is very slow
LoadBitmapByPixel(bitmap, image);
}
else
{
LoadBitmapByClone(bitmap, image);
}
break;
default:
LoadBitmapByLockBits(bitmap, image);
break;
}
// ConvertItemType image to supported format, if necessary
if ((pConvType != PixelLayout.None) && (pConvType != pType))
{
image = image.Convert(pConvType);
}
return(image);
}
