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using FFmpeg.AutoGen;
using System;
using System.Drawing;
using System.Runtime.InteropServices;
namespace EC.FFmpegAutoGen
{
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();
}
}
}