public OutputContext(AVIOStream ioStream)
{
if (!ioStream.CanWrite)
{
throw new ArgumentException("Can't write to stream");
}
fmtContext = ffmpeg.avformat_alloc_context();
if (fmtContext == null)
{
throw new FFmpegException(ffmpeg.AVERROR(ffmpeg.ENOMEM), "Failed to allocate format context");
}
fmtContext->pb = ioStream.ioContext;
}
public InputContext(AVIOStream ioStream)
{
if (!ioStream.CanRead)
{
throw new ArgumentException("Can't read from stream");
}
fmtContext = ffmpeg.avformat_alloc_context();
if (fmtContext == null)
{
throw new FFmpegException(ffmpeg.AVERROR(ffmpeg.ENOMEM), "Failed to allocate format context");
}
fmtContext->pb = ioStream.ioContext;
int ret = 0;
fixed(AVFormatContext **fmtContextPtr = &fmtContext)
{
ret = ffmpeg.avformat_open_input(fmtContextPtr, null, null, null);
}
if (ret < 0)
{
// format context is freed on failure in avformat_open_input, no need to clean up manually
throw new FFmpegException(ret, "Failed to open input");
}
ret = ffmpeg.avformat_find_stream_info(fmtContext, null);
if (ret < 0)
{
fixed(AVFormatContext **fmtContextPtr = &fmtContext)
{
ffmpeg.avformat_close_input(fmtContextPtr);
}
throw new FFmpegException(ret, "Failed to read stream information");
}
}
