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MediaDecoder.cs
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MediaDecoder.cs
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using System;
using System.Drawing;
using System.Runtime.InteropServices;
using FFmpeg.AutoGen;
namespace cavapa
{
public sealed unsafe class VideoConverter : IDisposable
{
private readonly SwsContext* _pConvertContext;
public VideoConverter(Size sourceSize, AVPixelFormat sourcePixelFormat,
Size destinationSize, AVPixelFormat destinationPixelFormat)
{
_pConvertContext = ffmpeg.sws_getContext(sourceSize.Width, sourceSize.Height, sourcePixelFormat,
destinationSize.Width,
destinationSize.Height, destinationPixelFormat,
ffmpeg.SWS_FAST_BILINEAR, null, null, null);
if (_pConvertContext == null) throw new ApplicationException("Could not initialize the conversion context.");
var convertedFrameBufferSize = ffmpeg.av_image_get_buffer_size(destinationPixelFormat, destinationSize.Width, destinationSize.Height, 1);
var convertedFrameBufferPtr = Marshal.AllocHGlobal(convertedFrameBufferSize);
var dstData = new byte_ptrArray4();
var dstLinesize = new int_array4();
ffmpeg.av_image_fill_arrays(ref dstData, ref dstLinesize, (byte*) convertedFrameBufferPtr, destinationPixelFormat, destinationSize.Width, destinationSize.Height, 1);
}
public void Dispose()
{
}
public AVFrame Convert(AVFrame sourceFrame)
{
var dstData = new byte_ptrArray4();
var dstLinesize = new int_array4();
ffmpeg.sws_scale(_pConvertContext, sourceFrame.data, sourceFrame.linesize, 0, sourceFrame.height, dstData, dstLinesize);
return new AVFrame();
}
}
}