SikongJueluo/FPGA_WebLab
Archived
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

feat: 修改视频流后端服务，使其适配jpeg格式

Browse Source
This commit is contained in:
SikongJueluo
2025-08-07 15:16:18 +08:00
parent aff9da2a60
commit d2508f6484
4 changed files with 73 additions and 158 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
server/src/Peripherals/HdmiInClient.cs
View File

@@ -100,6 +100,51 @@ class HdmiIn
return result.Value;
}
public async ValueTask<(byte[] header, byte[] data, byte[] footer)?> GetMJpegFrame()
{
// 从HDMI读取RGB24数据
var readStartTime = DateTime.UtcNow;
var frameResult = await ReadFrame();
var readEndTime = DateTime.UtcNow;
var readTime = (readEndTime - readStartTime).TotalMilliseconds;
if (!frameResult.IsSuccessful || frameResult.Value == null)
{
logger.Warn("HDMI帧读取失败或为空");
return null;
}
var rgb24Data = frameResult.Value;
// 验证数据长度是否正确 (RGB24为每像素2字节)
var expectedLength = _currentWidth * _currentHeight * 2;
if (rgb24Data.Length != expectedLength)
{
logger.Warn("HDMI数据长度不匹配，期望: {Expected}, 实际: {Actual}",
expectedLength, rgb24Data.Length);
}
// 将RGB24转换为JPEG（参考Camera版本的处理）
var jpegStartTime = DateTime.UtcNow;
var jpegResult = Common.Image.ConvertRGB24ToJpeg(rgb24Data, _currentWidth, _currentHeight, 80);
var jpegEndTime = DateTime.UtcNow;
var jpegTime = (jpegEndTime - jpegStartTime).TotalMilliseconds;
if (!jpegResult.IsSuccessful)
{
logger.Error("HDMI RGB24转JPEG失败: {Error}", jpegResult.Error);
return null;
}
var jpegData = jpegResult.Value;
// 发送MJPEG帧（使用Camera版本的格式）
var mjpegFrameHeader = Common.Image.CreateMjpegFrameHeader(jpegData.Length);
var mjpegFrameFooter = Common.Image.CreateMjpegFrameFooter();
return (mjpegFrameHeader, jpegData, mjpegFrameFooter);
}
/// <summary>
/// 获取当前分辨率
/// </summary>

147
server/src/Services/HttpHdmiVideoStreamService.cs
View File

@@ -32,46 +32,38 @@ public class HttpHdmiVideoStreamService : BackgroundService
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
try
while (!stoppingToken.IsCancellationRequested)
{
while (!stoppingToken.IsCancellationRequested)
if (_httpListener == null) continue;
try
{
HttpListenerContext? context = null;
try
logger.Debug("Waiting for HTTP request...");
var contextTask = _httpListener.GetContextAsync();
var completedTask = await Task.WhenAny(contextTask, Task.Delay(-1, stoppingToken));
if (completedTask == contextTask)
{
logger.Debug("Waiting for HTTP request...");
context = await _httpListener.GetContextAsync();
var context = contextTask.Result;
logger.Debug($"Received request: {context.Request.Url?.AbsolutePath}");
if (context != null)
_ = HandleRequestAsync(context, stoppingToken);
}
catch (ObjectDisposedException)
else
{
// Listener closed, exit loop
break;
}
catch (HttpListenerException)
{
// Listener closed, exit loop
break;
}
catch (Exception ex)
{
logger.Error(ex, "Error in GetContextAsync");
break;
}
if (context != null)
_ = HandleRequestAsync(context, stoppingToken);
}
}
finally
{
_httpListener?.Close();
logger.Info("HDMI Video Stream Service stopped.");
catch (Exception ex)
{
logger.Error(ex, "Error in GetContextAsync");
break;
}
}
}
public override async Task StopAsync(CancellationToken cancellationToken)
{
logger.Info("Stopping HDMI Video Stream Service...");
_httpListener?.Close();
// 禁用所有活跃的HDMI传输
var disableTasks = new List<Task>();
@@ -229,9 +221,6 @@ public class HttpHdmiVideoStreamService : BackgroundService
{
logger.Debug("处理HDMI快照请求");
const int frameWidth = 960; // HDMI输入分辨率
const int frameHeight = 540;
// 从HDMI读取RGB565数据
var frameResult = await hdmiIn.ReadFrame();
if (!frameResult.IsSuccessful || frameResult.Value == null)
@@ -244,41 +233,7 @@ public class HttpHdmiVideoStreamService : BackgroundService
return;
}
var rgb565Data = frameResult.Value;
// 验证数据长度
var expectedLength = frameWidth * frameHeight * 2;
if (rgb565Data.Length != expectedLength)
{
logger.Warn("HDMI快照数据长度不匹配，期望: {Expected}, 实际: {Actual}",
expectedLength, rgb565Data.Length);
}
// 将RGB565转换为RGB24
var rgb24Result = Common.Image.ConvertRGB565ToRGB24(rgb565Data, frameWidth, frameHeight, isLittleEndian: false);
if (!rgb24Result.IsSuccessful)
{
logger.Error("HDMI快照RGB565转RGB24失败: {Error}", rgb24Result.Error);
response.StatusCode = 500;
var errorBytes = System.Text.Encoding.UTF8.GetBytes("Failed to process HDMI snapshot");
await response.OutputStream.WriteAsync(errorBytes, 0, errorBytes.Length, cancellationToken);
response.Close();
return;
}
// 将RGB24转换为JPEG
var jpegResult = Common.Image.ConvertRGB24ToJpeg(rgb24Result.Value, frameWidth, frameHeight, 80);
if (!jpegResult.IsSuccessful)
{
logger.Error("HDMI快照RGB24转JPEG失败: {Error}", jpegResult.Error);
response.StatusCode = 500;
var errorBytes = System.Text.Encoding.UTF8.GetBytes("Failed to encode HDMI snapshot");
await response.OutputStream.WriteAsync(errorBytes, 0, errorBytes.Length, cancellationToken);
response.Close();
return;
}
var jpegData = jpegResult.Value;
var jpegData = frameResult.Value;
// 设置响应头（参考Camera版本）
response.ContentType = "image/jpeg";
@@ -314,8 +269,6 @@ public class HttpHdmiVideoStreamService : BackgroundService
logger.Debug("开始HDMI MJPEG流传输");
int frameCounter = 0;
const int frameWidth = 960; // HDMI输入分辨率
const int frameHeight = 540;
while (!cancellationToken.IsCancellationRequested)
{
@@ -323,61 +276,13 @@ public class HttpHdmiVideoStreamService : BackgroundService
{
var frameStartTime = DateTime.UtcNow;
// 从HDMI读取RGB565数据
var readStartTime = DateTime.UtcNow;
var frameResult = await hdmiIn.ReadFrame();
var readEndTime = DateTime.UtcNow;
var readTime = (readEndTime - readStartTime).TotalMilliseconds;
var ret = await hdmiIn.GetMJpegFrame();
if (ret == null) continue;
var frame = ret.Value;
if (!frameResult.IsSuccessful || frameResult.Value == null)
{
logger.Warn("HDMI帧读取失败或为空");
continue;
}
var rgb565Data = frameResult.Value;
// 验证数据长度是否正确 (RGB565为每像素2字节)
var expectedLength = frameWidth * frameHeight * 2;
if (rgb565Data.Length != expectedLength)
{
logger.Warn("HDMI数据长度不匹配，期望: {Expected}, 实际: {Actual}",
expectedLength, rgb565Data.Length);
}
// 将RGB565转换为RGB24（参考Camera版本的处理）
var convertStartTime = DateTime.UtcNow;
var rgb24Result = Common.Image.ConvertRGB565ToRGB24(rgb565Data, frameWidth, frameHeight, isLittleEndian: false);
var convertEndTime = DateTime.UtcNow;
var convertTime = (convertEndTime - convertStartTime).TotalMilliseconds;
if (!rgb24Result.IsSuccessful)
{
logger.Error("HDMI RGB565转RGB24失败: {Error}", rgb24Result.Error);
continue;
}
// 将RGB24转换为JPEG（参考Camera版本的处理）
var jpegStartTime = DateTime.UtcNow;
var jpegResult = Common.Image.ConvertRGB24ToJpeg(rgb24Result.Value, frameWidth, frameHeight, 80);
var jpegEndTime = DateTime.UtcNow;
var jpegTime = (jpegEndTime - jpegStartTime).TotalMilliseconds;
if (!jpegResult.IsSuccessful)
{
logger.Error("HDMI RGB24转JPEG失败: {Error}", jpegResult.Error);
continue;
}
var jpegData = jpegResult.Value;
// 发送MJPEG帧（使用Camera版本的格式）
var mjpegFrameHeader = Common.Image.CreateMjpegFrameHeader(jpegData.Length);
var mjpegFrameFooter = Common.Image.CreateMjpegFrameFooter();
await response.OutputStream.WriteAsync(mjpegFrameHeader, 0, mjpegFrameHeader.Length, cancellationToken);
await response.OutputStream.WriteAsync(jpegData, 0, jpegData.Length, cancellationToken);
await response.OutputStream.WriteAsync(mjpegFrameFooter, 0, mjpegFrameFooter.Length, cancellationToken);
await response.OutputStream.WriteAsync(frame.header, 0, frame.header.Length, cancellationToken);
await response.OutputStream.WriteAsync(frame.data, 0, frame.data.Length, cancellationToken);
await response.OutputStream.WriteAsync(frame.footer, 0, frame.footer.Length, cancellationToken);
await response.OutputStream.FlushAsync(cancellationToken);
frameCounter++;
@@ -387,8 +292,8 @@ public class HttpHdmiVideoStreamService : BackgroundService
// 性能统计日志（每30帧记录一次）
if (frameCounter % 30 == 0)
{
logger.Debug("HDMI帧 {FrameNumber} 性能统计 - 读取: {ReadTime:F1}ms, RGB转换: {ConvertTime:F1}ms, JPEG转换: {JpegTime:F1}ms, 总计: {TotalTime:F1}ms, JPEG大小: {JpegSize} 字节",
frameCounter, readTime, convertTime, jpegTime, totalTime, jpegData.Length);
logger.Debug("HDMI帧 {FrameNumber} 性能统计 - 总计: {TotalTime:F1}ms, JPEG大小: {JpegSize} 字节",
frameCounter, totalTime, frame.data.Length);
}
}
catch (Exception ex)

37
server/src/Services/HttpVideoStreamService.cs
View File

@@ -1,8 +1,5 @@
#define USB_CAMERA
using System.Net;
using System.Text;
using System.Threading.Tasks;
using Peripherals.CameraClient; // 添加摄像头客户端引用
#if USB_CAMERA
@@ -414,7 +411,7 @@ public class HttpVideoStreamService : BackgroundService
{
_usbCamera = new VideoCapture(1);
_usbCamera.Fps = _frameRate;
_usbCamera.FrameWidth = _frameWidth;
_usbCamera.FrameWidth = _frameWidth;
_usbCamera.FrameHeight = _frameHeight;
_usbCameraEnable = _usbCamera.IsOpened();
}
@@ -1003,38 +1000,6 @@ public class HttpVideoStreamService : BackgroundService
logger.Info("HTTP 视频流服务已停止");
}
/// <summary>
/// 释放资源
/// </summary>
public override void Dispose()
{
if (_httpListener != null)
{
if (_httpListener.IsListening)
{
_httpListener.Stop();
}
_httpListener.Close();
}
lock (_clientsLock)
{
foreach (var client in _activeClients)
{
try { client.Close(); }
catch { /* 忽略关闭错误 */ }
}
_activeClients.Clear();
}
lock (_cameraLock)
{
_camera = null;
}
base.Dispose();
}
/// <summary>
/// 设置视频流分辨率
/// </summary>

2
server/src/Services/ProgressTrackerService.cs
View File

@@ -190,7 +190,7 @@ public class ProgressTrackerService : BackgroundService
{
logger.Error(ex, "Error during ProgressTracker cleanup");
}
await Task.Delay(TimeSpan.FromSeconds(30));
await Task.Delay(TimeSpan.FromSeconds(30), stoppingToken);
}
}