/// <summary>
/// Initializes a new instance of the <see cref="AVIOContext"/> class.
/// </summary>
/// <param name="ffmpeg">
/// An implementation of the <see cref="FFmpegClient"/> interface which provides access to the
/// native FFmpeg functions.
/// </param>
/// <param name="bufferSize">
/// The buffer size.
/// </param>
/// <param name="read_packet">
/// A function for refilling the buffer, may be NULL. For stream protocols, must never return 0 but rather a proper AVERROR code.
/// </param>
/// <param name="write_packet">
/// A function for writing the buffer contents, may be NULL. The function may not change the input buffers content.
/// </param>
public AVIOContext(FFmpegClient ffmpeg, ulong bufferSize, NativeReadPacketFunc read_packet, NativeWritePacketFunc?write_packet)
{
this.ffmpeg = ffmpeg;
void *memory = ffmpeg.AllocMemory(bufferSize);
var memoryHandle = new AVMemoryHandle(ffmpeg, memory, false);
var avio_ctx = ffmpeg.AllocAVIOContext((byte *)memory, (int)bufferSize, write_packet == null ? 0 : 1, (void *)IntPtr.Zero, read_packet, write_packet.GetValueOrDefault(), null);
this.buffer = memoryHandle;
this.handle = new AVIOContextHandle(ffmpeg, avio_ctx);
}
/// <summary>
/// Initializes a new instance of the <see cref="AVIOContext"/> class.
/// </summary>
/// <param name="ffmpeg">
/// An implementation of the <see cref="FFmpegClient"/> interface which provides access to the native FFmpeg functions.
/// </param>
/// <param name="handle">
/// A <see cref="AVIOContextHandle"/> which points to the native <see cref="NativeAVIOContext"/>
/// object.
/// </param>
public AVIOContext(FFmpegClient ffmpeg, AVIOContextHandle handle)
{
this.ffmpeg = ffmpeg;
this.handle = handle;
this.buffer = new AVMemoryHandle(this.ffmpeg, this.NativeObject->buffer, ownsHandle: false);
}