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NVDEC implementation using FFmpeg (#443)

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* Initial nvdec implementation using FFmpeg

* Fix swapped channels on the video decoder and the G8R8 texture format

* Fix texture samplers not being set properly (regression)

* Rebased

* Remove unused code introduced on the rebase

* Add support for RGBA8 output format on the video image composer

* Correct spacing

* Some fixes for rebase and other tweaks

* Allow size mismatch on frame copy

* Get rid of GetHostAddress calls on VDec
This commit is contained in:
gdkchan 2018-12-03 00:38:47 -02:00 • committed by GitHub
parent ad00fd0244
commit c86aacde76
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65 changed files with 2795 additions and 76 deletions
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75
Ryujinx.Graphics/VDec/BitStreamWriter.cs Normal file
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using System.IO;
namespace Ryujinx.Graphics.VDec
{
class BitStreamWriter
{
private const int BufferSize = 8;
private Stream BaseStream;
private int Buffer;
private int BufferPos;
public BitStreamWriter(Stream BaseStream)
{
this.BaseStream = BaseStream;
}
public void WriteBit(bool Value)
{
WriteBits(Value ? 1 : 0, 1);
}
public void WriteBits(int Value, int ValueSize)
{
int ValuePos = 0;
int Remaining = ValueSize;
while (Remaining > 0)
{
int CopySize = Remaining;
int Free = GetFreeBufferBits();
if (CopySize > Free)
{
CopySize = Free;
}
int Mask = (1 << CopySize) - 1;
int SrcShift = (ValueSize - ValuePos) - CopySize;
int DstShift = (BufferSize - BufferPos) - CopySize;
Buffer |= ((Value >> SrcShift) & Mask) << DstShift;
ValuePos += CopySize;
BufferPos += CopySize;
Remaining -= CopySize;
}
}
private int GetFreeBufferBits()
{
if (BufferPos == BufferSize)
{
Flush();
}
return BufferSize - BufferPos;
}
public void Flush()
{
if (BufferPos != 0)
{
BaseStream.WriteByte((byte)Buffer);
Buffer = 0;
BufferPos = 0;
}
}
}
}