protected void Analyze()
{
var img = _InnerWorkImg;
foreach (Guid gid in _InnerWorkImg.FrameDimensionsList)
{
FrameDimension f = FrameDimension.Time;
//获取总帧数
int count = img.GetFrameCount(f);
//每一帧
for (int c = 0; c < count; c++)
{
//选择由维度和索引指定的帧
img.SelectActiveFrame(f, c);
var DelayProperty = img.GetPropertyItem(20736);
if (null != DelayProperty)
{
var DelayValue = DelayProperty.Value;
x.Say(ByteUtil.Buffer2String(DelayValue));
return;
}
}
}
}
/// <summary>
///
/// </summary>
/// <remarks>
/// http://cnn237111.blog.51cto.com/2359144/1261422
/// </remarks>
/// <param name="filePath"></param>
/// <returns></returns>
public static List <int> GetDelay4FileByte(string filePath)
{
byte[] bytes = File.ReadAllBytes(filePath);
List <int> Result = new List <int>();
x.Say("all bytes in file::");
x.Say(ByteUtil.Buffer2String(bytes));
//byte[] delaybyte = BitConverter.GetBytes(delay);//转成16位无符号字节数组。该数组肯定只有2个元素
for (int i = 0; i < bytes.Length - 1; i++)
{
if (bytes[i] == 0x21 && bytes[i + 1] == 0xf9)//GraphicsControlExtension 开始标志
{
//bytes[i + 4] = delaybyte[0];//这两位就是定义延迟时间的，修改就可以了。
//bytes[i + 5] = delaybyte[1];
int low = bytes[i + 4];
int high = bytes[i + 5];
int FrameDelay = high * 256 + low;
x.Say(" 只计算前2字节的延迟结果 " + FrameDelay);
int low2 = bytes[i + 6];
int high2 = bytes[i + 7];
int s2 = high2 * 256 + low2;
x.Say(" 只计算后2字节的延迟结果 " + s2);
// 测试发现， 只有 21 F9 这个标志之后的 2位是 延迟时间，后面的不知道是什么。
// 所以下面 得到的值是不对的：
int delay = BitConverter.ToInt32(bytes, i + 4);
Result.Add(FrameDelay);
}
}
return(Result);
}
