我正在 XNA 中为 Windows Phone 编写一个应用程序......我想读取存储在应用程序资源中的 MJPEG 流。我找到了许多关于如何通过 WebHttpRequest 从网站获取 MJPEG 的示例，如下所示：
// get the response
HttpWebRequest request = (HttpWebRequest) asyncResult.AsyncState;
HttpWebResponse response = (HttpWebResponse) request.EndGetResponse(asyncResult);
try {
// find boundary value
string contentType = response.Headers["Content-Type"];
if (!String.IsNullOrEmpty(contentType) && !contentType.Contains("=")) {
throw new FormatException("Invalid content-type header. The source is likely not returning a proper MJPEG stream.");
}
string boundary = response.Headers["Content-Type"].Split('=')[1].Replace("\"", "");
byte[] boundaryBytes = Encoding.UTF8.GetBytes(boundary.StartsWith("--") ? boundary : "--" + boundary);
using (Stream stream = response.GetResponseStream()) {
using (BinaryReader binaryReader = new BinaryReader(stream)) {
// code to parse the MJPEG stream
}
}
} finally {
response.Close();
}
...但这并不是我想要的。下面是我从应用程序资源中将 MJPEG 作为二进制流读取的代码：
private void ParseMjpeg(object uri)
{
// what the corresponding code for determining the boundary bytes in my local MJPEG?
byte[] boundaryBytes = ???
using (Stream stream = TitleContainer.OpenStream(uri.ToString())) {
using (BinaryReader binaryReader = new BinaryReader(stream)) {
// code to parse the MJPEG stream as before: OK
}
}
}
如何在上面的代码中确定边界字节？任何帮助将非常感激。
谢谢，j3d