public MMALImageDecoderConverter(TransformStreamCaptureHandler handler) : base(handler)
{
}
public unsafe MMALImageFileEncoder(TransformStreamCaptureHandler handler)
: base(handler)
{
}
public async Task EncodeDecodeFromFile()
{
TestHelper.BeginTest("Image - EncodeDecodeFromFile");
TestHelper.SetConfigurationDefaults();
TestHelper.CleanDirectory("/home/pi/images/tests");
string imageFilepath = string.Empty;
string decodedFilepath = string.Empty;
// First take a new JPEG picture using RGB24 encoding.
using (var imgCaptureHandler = new ImageStreamCaptureHandler("/home/pi/images/tests", "jpg"))
using (var preview = new MMALNullSinkComponent())
using (var imgEncoder = new MMALImageEncoder(imgCaptureHandler))
{
Fixture.MMALCamera.ConfigureCameraSettings();
var portConfig = new MMALPortConfig(MMALEncoding.JPEG, MMALEncoding.RGB24, 90);
imgEncoder.ConfigureOutputPort(portConfig);
// Create our component pipeline.
Fixture.MMALCamera.Camera.StillPort
.ConnectTo(imgEncoder);
Fixture.MMALCamera.Camera.PreviewPort
.ConnectTo(preview);
// Camera warm up time
await Task.Delay(2000);
await Fixture.MMALCamera.ProcessAsync(Fixture.MMALCamera.Camera.StillPort);
Fixture.CheckAndAssertFilepath(imgCaptureHandler.GetFilepath());
imageFilepath = imgCaptureHandler.GetFilepath();
}
// Next decode the JPEG to raw YUV420.
using (var stream = File.OpenRead(imageFilepath))
using (var imgCaptureHandler = new TransformStreamCaptureHandler(stream, "/home/pi/images/", "raw"))
using (var imgDecoder = new MMALImageFileDecoder(imgCaptureHandler))
{
var inputConfig = new MMALPortConfig(MMALEncoding.JPEG, MMALEncoding.RGB24, 2560, 1920, 0, 0, 0, true, null);
var outputConfig = new MMALPortConfig(MMALEncoding.I420, null, 2560, 1920, 0, 0, 0, true, null);
// Create our component pipeline.
imgDecoder.ConfigureInputPort(inputConfig)
.ConfigureOutputPort(outputConfig);
await imgDecoder.Convert();
Fixture.CheckAndAssertFilepath(imgCaptureHandler.GetFilepath());
decodedFilepath = imgCaptureHandler.GetFilepath();
}
// Finally re-encode to BMP using YUV420.
using (var stream = File.OpenRead(decodedFilepath))
using (var imgCaptureHandler = new TransformStreamCaptureHandler(stream, "/home/pi/images/", "bmp"))
using (var imgEncoder = new MMALImageFileEncoder(imgCaptureHandler))
{
var inputConfig = new MMALPortConfig(MMALEncoding.I420, null, 2560, 1920, 0, 0, 0, true, null);
var outputConfig = new MMALPortConfig(MMALEncoding.BMP, MMALEncoding.I420, 2560, 1920, 0, 0, 0, true, null);
imgEncoder.ConfigureInputPort(inputConfig)
.ConfigureOutputPort(outputConfig);
await imgEncoder.Convert();
Fixture.CheckAndAssertFilepath(imgCaptureHandler.GetFilepath());
}
}
