我有来自相机的UYVY数据缓冲区,我使用GSSF Directshow.net过滤器通过图形推送缓冲区。
目前的图表是
GSSF -> YUV Transform -> AVI Splitter -> Video Renderer
图表正确计算颜色并正确显示,但图像中的条形图应该不在那里,我不知道它们来自哪里。盯着图像会伤到我的眼睛。
此函数获取UYVY缓冲区(mainbyte)并将其复制到整数数组
unsafe public void ImageFromPixels__()
{
byte[] x = mainbyte;
long fff = 720 * 1280;
mainptr = new IntPtr(fff);
for (int p = 0; p < 720 * 1280; p++)
{
U = (x[p * 4 + 0]);
Y = (x[p * 4 + 1]);
V = (x[p * 4 + 2]);
Y2 = (x[p * 4 + 3]);
// int one = V << 16 | Y << 8 | U;
// int two = V << 16 | Y2 << 8 | U;
int one = Y2 << 24 | V << 16 | Y << 8 | U;
// mainint[p * 2 + 0] = one;
// mainint[p * 2 + 1] = two;
mainint[p] = one;
}
m_FPS = UNIT / 20;
m_b = 211;
m_g = 197;
}
此函数获取相同的整数数组并将其打包到GSSF流指针
中 override unsafe public int GetImage(int iFrameNumber, IntPtr ip, int iSize, out int iRead)
{
int hr = 0;
if (iFrameNumber>-1)
{
if (iFrameNumber < MAXFRAMES)
{
ImageFromPixels_(20, mainbyte);
m_g += 3;
m_b += 7;
int* bp = (int*)ip.ToPointer();
Random k = new Random();
StreamReader s = new StreamReader("jpegFile.txt");
for (int f = 0; f < HEIGHT; f++)
{
for (int x = 0; x < (WIDTH); x += 1)
{
*(bp + (f * WIDTH) + x) = mainint[f * 1280 + x];
}
}
}
else
{
hr = 1; // End of stream
}
}
iRead = iSize;
return hr;
}
这为GSSF的输出引脚设置位图压缩 我想我可能在这里做错了但看起来不错。
override public void SetMediaType(IGenericSampleConfig psc)
{
BitmapInfoHeader bmi = new BitmapInfoHeader();
// Build a BitmapInfo struct using the parms from the file
bmi.Size = Marshal.SizeOf(typeof(BitmapInfoHeader));
bmi.Width = WIDTH;
bmi.Height = HEIGHT * -1;
bmi.Planes = 1;
bmi.BitCount = BPP;
bmi.Compression = 0x59565955; //UYVY
bmi.ImageSize = (bmi.BitCount / 8) * bmi.Width * bmi.Height;
bmi.XPelsPerMeter = 0;
bmi.YPelsPerMeter = 0;
bmi.ClrUsed = 0;
bmi.ClrImportant = 0;
int hr = psc.SetMediaTypeFromBitmap(bmi, m_FPS);
DsError.ThrowExceptionForHR(hr);
}
更新 改变它升技
override unsafe public int GetImage(int iFrameNumber, IntPtr ip, int iSize, out int iRead)
{
int hr = 0;
if (iFrameNumber>-1)
{
if (iFrameNumber < MAXFRAMES)
{
ImageFromPixels_(20, mainbyte);
m_g += 3;
m_b += 7;
int* bp = (int*)ip.ToPointer();
Random k = new Random();
StreamReader s = new StreamReader("jpegFile.txt");
for (int f = 0; f < 720; f++)
{
for (int x = 0; x < (1280); x += 1)
{
*(bp + (f * 1280) + x) = mainint[f * 1280 + x];
}
}
}
else
{
hr = 1; // End of stream
}
}
// override public void SetMediaType(IGenericSampleConfig psc) { BitmapInfoHeader bmi = new BitmapInfoHeader();
// Build a BitmapInfo struct using the parms from the file
bmi.Size = Marshal.SizeOf(typeof(BitmapInfoHeader));
bmi.Width = WIDTH;
bmi.Height = HEIGHT * -1;
bmi.Planes = 1;
bmi.BitCount = BPP;
bmi.Compression = 0x59565955;
bmi.ImageSize = (bmi.BitCount / 8) * bmi.Width * bmi.Height;
bmi.XPelsPerMeter = 0;
bmi.YPelsPerMeter = 0;
bmi.ClrUsed = 0;
bmi.ClrImportant = 0;
int hr = psc.SetMediaTypeFromBitmap(bmi, m_FPS);
DsError.ThrowExceptionForHR(hr);
}
//
unsafe public void ImageFromPixels_(long FPS, byte[] x)
{
long fff = 720 * 1280 * 3;
mainptr = new IntPtr(fff);
for (int p = 0; p < 720 * 640; p++)
{
U = (x[ p * 4 + 0]);
Y = (x[p * 4 + 1]);
V = (x[p * 4 + 2]);
Y2 = (x[p * 4 + 3]);
int one = Y2 << 24 | V << 16 | Y << 8 | U;
//int one = V << 16 | Y << 8 | U;
//int two = V << 16 | Y2 << 8 | U;
//mainint[p * 2 + 0] = one;
//mainint[p * 2 + 1] = two;
mainint[p] = one;
}
m_FPS = UNIT / FPS;
m_b = 211;
m_g = 197;
}
如果我更改GetImage中的其他数字以改变视频的高度,或者如果我在ImagePixel中更改它,那么我只是得到黑屏:|
答案 0 :(得分:1)
指针数学很糟糕。从
更改了我的代码for (int f = 0; f < 720; f++)
{
for (int x = 0; x < (1280); x += 1)
{
*(bp + (f * 1280) + x) = mainbyte[f * 1280 + x];
}
}
到
Marshal.Copy(mainbyte, 0, ip, 1280*720);
并将BPP从32改为16,现在它可以毫无障碍地工作。
&LT; _&LT;
答案 1 :(得分:0)
你的循环如何达到(720 * 1280),这是图片中每个像素的一次迭代,但在循环中你正在做Y和Y2。看起来不对。