/// <summary>
/// 保存VideoData数据. 格式为Frame头+FrameData。
///
/// 其中Frame头固定为64个int。
/// 格式为：[VideoType][Frames][FrameSize][FrameWidth][FrameHeight][VideoBufferSize][保留字节]
/// </summary>
/// <param name="path"></param>
public static void SaveData(string filePath, FrameData videoData)
{
if (videoData != null)
{
using (FileStream fs = new FileStream(filePath, FileMode.Create))
{
using (BinaryWriter writer = new BinaryWriter(fs))
{
writer.Write(videoData.Frames); // number of frames
writer.Write(videoData.FrameWidth); // frame width
writer.Write(videoData.FrameHeight); // frame height
writer.Write((int)videoData.Type); // video type
writer.Write(videoData.FrameSize); // frame size
for (int i = 0; i < 59; i++)
{
writer.Write((int)0);
}
if (videoData.FrameBuffer != null)
{
// 由于video buffer的size是重用的，因此buffer的size可能会大于实际数据的大小
// 这里使用实际的数据大小来进行保存
int dataSize = videoData.FrameSize * videoData.Frames;
writer.Write(videoData.FrameBuffer, 0, dataSize);
}
}
}
}
}
public static FrameData LoadData(string filePath)
{
try
{
using (FileStream fs = new FileStream(filePath, FileMode.Open))
{
using (BinaryReader reader = new BinaryReader(fs))
{
FrameData videoData = new FrameData();
videoData.Frames = reader.ReadInt32();
videoData.FrameWidth = reader.ReadInt32();
videoData.FrameHeight = reader.ReadInt32();
videoData.Type = (VideoType)reader.ReadInt32();
videoData.FrameSize = reader.ReadInt32();
for (int i = 0; i < 59; i++)
{
reader.ReadInt32();
}
int bufferLength = videoData.Frames * videoData.FrameSize;
if (bufferLength > 0)
{
videoData.FrameBuffer = reader.ReadBytes(bufferLength);
}
return videoData;
}
}
}
catch
{
return null;
}
}