public static bool OpenSource(SpectrumVideoFileConfig cfg, out SpectrumVideoSource source)
{
//Set default
source = null;
//Make sure file exists
if (!File.Exists(cfg.pathname))
{
return(false);
}
//Open stream
FileStream fs = new FileStream(cfg.pathname, FileMode.Open, FileAccess.Read);
//Attempt to load as a WAV file
ISampleReader reader;
try
{
reader = new WavFileReader(fs);
} catch
{
//Fall back to loading RAW files
fs.Position = 0;
if (cfg.raw_rate == 0)
{
return(false);
}
reader = new StreamSampleReader(fs, cfg.raw_format, cfg.raw_rate, 0, 2, 32768);
}
//Get source
source = new SpectrumVideoSource(fs, reader);
return(true);
}
private static SpectrumVideoSource WrapSource(SpectrumVideoCanvasConfig config)
{
if (!SpectrumVideoSource.OpenSource(config.source, out SpectrumVideoSource source))
{
throw new Exception("Source file is incorrectly configured for " + config.label);
}
return(source);
}
public SpectrumVideoCanvas(SpectrumVideoSource source, SpectrumVideoCanvasConfig config, IOutputProvider outputProvider)
{
//Set
width = config.video_output.width;
label = config.label;
decimation = config.baseband.decimation;
frameRate = config.video_output.frameRate;
this.outputProvider = outputProvider;
this.source = source;
//Create IQ decimator and oscilator
oscillator = new Oscillator(SampleRate, config.baseband.freqOffset);
decimator = new ComplexDecimator(SampleRate, DecimatedSampleRate, config.baseband.decimation, config.baseband.decimationAttenuation, DecimatedSampleRate * config.baseband.decimationTransitionRatio);
//Create all audio resources
foreach (var o in config.audio_outputs)
{
AddResource(new AudioResource(o, this));
}
//Create all components
components = new SpectrumVideoComponent[config.components.Count];
componentOffsets = new int[config.components.Count];
for (int i = 0; i < components.Length; i++)
{
components[i] = ComponentFactory.MakeComponent(this, config.components[i]);
}
//Get the image dimensions by calculating the total height
height = 0;
for (int i = 0; i < components.Length; i++)
{
componentOffsets[i] = height * ImageWidth;
height += components[i].Height;
}
//Create misc
videoOutput = outputProvider.GetVideoOutput(config.video_output.filename, ImageWidth, ImageHeight, config.video_output.frameRate, BufferSize);
frameBuffer = UnsafeBuffer.Create(ImageWidth * ImageHeight, out frameBufferPtr);
buffer = UnsafeBuffer.Create(BufferSize, out bufferPtr);
textGenerator = FontStore.CreateRenderer(ImageWidth, ImageHeight);
//Fill the entire canvas with black
for (int i = 0; i < ImageWidth * ImageHeight; i++)
{
frameBufferPtr[i] = new UnsafeColor(0, 0, 0);
}
//Init all components
for (int i = 0; i < components.Length; i++)
{
components[i].Init();
components[i].InitFrame(frameBufferPtr + componentOffsets[i]);
}
}
