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MediaElement.FFmpeg.cs
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MediaElement.FFmpeg.cs
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using System;
using System.Linq;
using System.Threading;
using System.Runtime.InteropServices;
using FFmpeg.AutoGen;
using System.Windows.Controls;
using System.Diagnostics;
namespace FFMEGE {
public partial class MediaElement : UserControl {
private const int EndOfFileErrorCode = -541478725;
private const int SuccessCode = 0;
private static object FFLockObject = new object();
private static bool FFmpegRegistered;
private static string FFmpegPath = System.AppDomain.CurrentDomain.BaseDirectory + "zen";
// setup logging @ correct Level Debug gives playback performance issues
private static int FFmpegLogLevel = ffmpeg.AV_LOG_ERROR;
//private static int FFmpegLogLevel = ffmpeg.AV_LOG_VERBOSE;
//private static int FFmpegLogLevel = ffmpeg.AV_LOG_DEBUG;
private HWDecode CurrentHWDecode = HWDecode.D3D11;
private enum HWDecode {
CUDA,
DXVA2,
D3D11,
SW
}
private Thread PlaybackThread;
private unsafe av_log_set_callback_callback LogCallback;
private unsafe void RegisterFFmpeg() {
//Only load ffmpeg dll's once to save ram
if (FFmpegRegistered) {
WriteLine("FFmpeg Already Loaded");
return;
}
WriteLine("Loading FFmpeg");
NativeMethods.RegisterLibrariesSearchPath(FFmpegPath);
//Load AVCodec Init
ffmpeg.av_register_all();
ffmpeg.avcodec_register_all();
WriteLine($"FFmpeg version info: {ffmpeg.av_version_info()}");
// setup logging @ correct Level Debug gives playback performance issues
ffmpeg.av_log_set_level(FFmpegLogLevel);
//Callback for logging
LogCallback = (p0, level, format, vl) => {
if (level > ffmpeg.av_log_get_level()) return;
var lineSize = 1024;
var lineBuffer = stackalloc byte[lineSize];
var printPrefix = 1;
ffmpeg.av_log_format_line(p0, level, format, vl, lineBuffer, lineSize, &printPrefix);
var line = Marshal.PtrToStringAnsi((IntPtr)lineBuffer);
WriteLine(line);
};
ffmpeg.av_log_set_callback(LogCallback);
//Only load ffmpeg dll's once to save ram
FFmpegRegistered = true;
}
public static unsafe string GetFFmpegErrorMessage(int code) {
var errorStrBytes = new byte[1024];
var errorStrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(sbyte)) * errorStrBytes.Length);
ffmpeg.av_strerror(code, (byte*)errorStrPtr, (ulong)errorStrBytes.Length);
Marshal.Copy(errorStrPtr, errorStrBytes, 0, errorStrBytes.Length);
Marshal.FreeHGlobal(errorStrPtr);
var errorMessage = System.Text.Encoding.ASCII.GetString(errorStrBytes).Split('\0').FirstOrDefault();
return errorMessage;
}
#region HW Get Format Callbacks
/// <summary>
/// Cuda Video Callback when AVCodec Opening to determine if the track matches the HWAccel format
/// </summary>
/// <param name="avctx"></param>
/// <param name="pix_fmts"></param>
/// <returns></returns>
private unsafe AVPixelFormat Get_Format_CUDA(AVCodecContext* avctx, AVPixelFormat* pix_fmts) {
WriteLine("Get_Format: CUDA");
while (*pix_fmts != AVPixelFormat.AV_PIX_FMT_NONE) {
if (*pix_fmts == AVPixelFormat.AV_PIX_FMT_CUDA) {
//DecodeContext* decode = avctx->opaque;
AVHWFramesContext* frames_ctx;
//ffmpeg.AVQSVFramesContext* frames_hwctx;
int ret;
/* create a pool of surfaces to be used by the decoder */
avctx->hw_frames_ctx = ffmpeg.av_hwframe_ctx_alloc(avctx->hw_device_ctx);
if (avctx->hw_frames_ctx == null)
return AVPixelFormat.AV_PIX_FMT_NONE;
frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
//frames_hwctx = (ffmpeg.AVQSVFramesContext*)frames_ctx->hwctx;
frames_ctx->format = AVPixelFormat.AV_PIX_FMT_CUDA;
frames_ctx->sw_format = avctx->sw_pix_fmt;
frames_ctx->width = avctx->coded_width;
frames_ctx->height = avctx->coded_height;
frames_ctx->initial_pool_size = 1;
//frames_hwctx->frame_type = (int)ffmpeg.MFXMemType.MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
ret = ffmpeg.av_hwframe_ctx_init(avctx->hw_frames_ctx);
if (ret < 0)
return AVPixelFormat.AV_PIX_FMT_NONE;
return AVPixelFormat.AV_PIX_FMT_CUDA;
}
pix_fmts++;
}
WriteLine("The CUDA pixel format not offered in get_format()\n");
return AVPixelFormat.AV_PIX_FMT_NONE;
}
/// <summary>
/// DXVA Video Callback when AVCodec Opening to determine if the track matches the HWAccel format
/// </summary>
/// <param name="avctx"></param>
/// <param name="pix_fmts"></param>
/// <returns></returns>
private unsafe AVPixelFormat Get_Format_DXVA(AVCodecContext* avctx, AVPixelFormat* pix_fmts) {
while (*pix_fmts != AVPixelFormat.AV_PIX_FMT_NONE) {
if (*pix_fmts == AVPixelFormat.AV_PIX_FMT_DXVA2_VLD) {
return AVPixelFormat.AV_PIX_FMT_D3D11VA_VLD;
}
pix_fmts++;
}
WriteLine("The DXVA2 pixel format not offered in get_format()\n");
return AVPixelFormat.AV_PIX_FMT_NONE;
}
/// <summary>
/// D3D11 Video Callback when AVCodec Opening to determine if the track matches the HWAccel format
/// </summary>
/// <param name="avctx"></param>
/// <param name="pix_fmts"></param>
/// <returns></returns>
private unsafe AVPixelFormat Get_Format_D3D11(AVCodecContext* avctx, AVPixelFormat* pix_fmts) {
WriteLine("Get_Format: D3D11");
while (*pix_fmts != AVPixelFormat.AV_PIX_FMT_NONE) {
if (*pix_fmts == AVPixelFormat.AV_PIX_FMT_D3D11) {
return AVPixelFormat.AV_PIX_FMT_D3D11;
}
pix_fmts++;
}
WriteLine("The D3D11 pixel format not offered in get_format()\n");
return AVPixelFormat.AV_PIX_FMT_NONE;
}
#endregion
/// <summary>
/// Decoder Function for Thread. All containted in one to simplify memory management of the unmanaged resources
/// </summary>
private unsafe void Decoder() {
int retErr = 0;
//Open Input Context to open media
AVFormatContext* pInputContext = ffmpeg.avformat_alloc_context();
if (ffmpeg.avformat_open_input(&pInputContext, uri.OriginalString, null, null) != 0)
throw new ApplicationException(@"Could not open file");
if (ffmpeg.avformat_find_stream_info(pInputContext, null) != 0)
throw new ApplicationException(@"Could not find stream info");
//Loop thru to find the stream that the video
AVStream* pStream = null;
for (var i = 0; i < pInputContext->nb_streams; i++)
if (pInputContext->streams[i]->codec->codec_type == AVMediaType.AVMEDIA_TYPE_VIDEO) {
pStream = pInputContext->streams[i];
break;
}
if (pStream == null)
throw new ApplicationException(@"Could not found video stream");
WriteLine($"Codec name: {ffmpeg.avcodec_get_name(pStream->codec->codec_id)} CodecID: {pStream->codec->codec_id}");
//Get Codec name from input stream
string codecname = ffmpeg.avcodec_get_name(pStream->codec->codec_id);
AVCodec* pCodec = null;
//Open Codec, cuvid has sepearte encoders to make the hwaccel work
if (CurrentHWDecode == HWDecode.CUDA) {
pCodec = ffmpeg.avcodec_find_decoder_by_name(codecname + "_cuvid");
if (pCodec == null) {
//use software codec if hardware type doesnt exist
WriteLine("Failing back to Software from: " + codecname);
CurrentHWDecode = HWDecode.SW;
pCodec = ffmpeg.avcodec_find_decoder_by_name(codecname);
}
}
else {
pCodec = ffmpeg.avcodec_find_decoder_by_name(codecname);
}
if (pCodec == null)
throw new ApplicationException(@"Unsupported codec");
//create new deocder context
AVCodecContext* pCodecContext = ffmpeg.avcodec_alloc_context3(pCodec);
ffmpeg.avcodec_parameters_to_context(pCodecContext, pStream->codecpar);
//read size and fps from input stream
int width = pStream->codec->width;
int height = pStream->codec->height;
SwsContext* pConvertContext = null;
if (CurrentHWDecode != HWDecode.D3D11) {
pConvertContext = ffmpeg.sws_getContext(width, height, pCodecContext->pix_fmt, width, height, AVPixelFormat.AV_PIX_FMT_BGRA, ffmpeg.SWS_FAST_BILINEAR, null, null, null);
if (pConvertContext == null)
throw new ApplicationException(@"Could not initialize the conversion context");
}
// HWaccel Decoder Setup
if (!(CurrentHWDecode == HWDecode.SW)) {
WriteLine("Initilizing Hwaccel: " + CurrentHWDecode.ToString());
switch (CurrentHWDecode) {
case HWDecode.CUDA:
retErr = ffmpeg.av_hwdevice_ctx_create(&pCodecContext->hw_device_ctx, AVHWDeviceType.AV_HWDEVICE_TYPE_CUDA, "auto", null, 0);
pCodecContext->get_format = new AVCodecContext_get_format(Get_Format_CUDA);
break;
case HWDecode.D3D11:
retErr = ffmpeg.av_hwdevice_ctx_create(&pCodecContext->hw_device_ctx, AVHWDeviceType.AV_HWDEVICE_TYPE_D3D11VA, "auto", null, 0);
pCodecContext->get_format = new AVCodecContext_get_format(Get_Format_D3D11);
break;
case HWDecode.DXVA2:
retErr = ffmpeg.av_hwdevice_ctx_create(&pCodecContext->hw_device_ctx, AVHWDeviceType.AV_HWDEVICE_TYPE_DXVA2, "auto", null, 0);
pCodecContext->get_format = new AVCodecContext_get_format(Get_Format_DXVA);
break;
}
if (retErr < 0) {
WriteLine("Error creating a HWAccel device");
return;
}
}
lock (FFLockObject) {
if (ffmpeg.avcodec_open2(pCodecContext, pCodec, null) < 0)
throw new ApplicationException(@"Could not open codec");
}
//Create Packet Object for reading from file
AVPacket packet = new AVPacket();
AVPacket* pPacket = &packet;
//Init Packet Memory
ffmpeg.av_init_packet(pPacket);
//Create Frames for decoder
AVFrame* pDecodedFrame = null; // frame from decoder
AVFrame* pHWTransferFrame = null; //frame to transfer from hwaccel
AVFrame* pConvertedFrame = null; //frame for output for software
switch (CurrentHWDecode) {
case HWDecode.CUDA:
case HWDecode.DXVA2:
case HWDecode.SW:
pDecodedFrame = ffmpeg.av_frame_alloc();
pHWTransferFrame = ffmpeg.av_frame_alloc();
pConvertedFrame = ffmpeg.av_frame_alloc();
break;
case HWDecode.D3D11:
pDecodedFrame = ffmpeg.av_frame_alloc();
break;
}
//Sizes for SW Decode Bitmap
int convertedFrameBufferSize=0;
byte[] convertedFrameBufferArray = null;
var dstData = new byte_ptrArray4();
var dstLinesize = new int_array4();
if (CurrentHWDecode == HWDecode.SW) {
convertedFrameBufferSize = ffmpeg.av_image_get_buffer_size(AVPixelFormat.AV_PIX_FMT_RGBA, width, height, 1);
convertedFrameBufferArray = new byte[convertedFrameBufferSize];
}
//D3D11 DXGI resource and surface index
uint* resource = null;
uint* resourceIndex = null;
//Playback Loop Variables
Stopwatch sw = new Stopwatch();
int FrameRateLoopTime = Convert.ToInt32((float)1000 / (pStream->codec->framerate.num / pStream->codec->framerate.den));
int frameNumber = 0;
int readFrameResult = 0;
bool doLoop = false;
bool emptyPacket;
fixed (byte* convertedFrameBuffer = convertedFrameBufferArray) {
if (CurrentHWDecode == HWDecode.SW) {
retErr = ffmpeg.av_image_fill_arrays(ref dstData, ref dstLinesize, convertedFrameBuffer, AVPixelFormat.AV_PIX_FMT_RGBA, width, height, 1);
}
while ((readFrameResult != EndOfFileErrorCode || doLoop) && MediaStopping == false) {
if (MediaPause) {
Thread.Sleep(FrameRateLoopTime);
}
else {
try {
//Read packet from file
readFrameResult = ffmpeg.av_read_frame(pInputContext, pPacket);
if (readFrameResult == 0) {
doLoop = false;
}
else if (readFrameResult == EndOfFileErrorCode) {
doLoop = true;
frameNumber = 0;
//Rewind the clip
ffmpeg.av_seek_frame(pInputContext, -1, 0, ffmpeg.AVSEEK_FLAG_BACKWARD);
}
else if (readFrameResult < 0) {
break;
}
emptyPacket = readFrameResult == EndOfFileErrorCode;
if (pPacket->stream_index != pStream->index)
continue;
if (readFrameResult == SuccessCode) {
//submit packet to decoder
int sendResult = ffmpeg.avcodec_send_packet(pCodecContext, pPacket);
if (sendResult < 0) {
break;
}
else {
//read packet from decoder
retErr = ffmpeg.avcodec_receive_frame(pCodecContext, pDecodedFrame);
if (retErr == 0) {
//got a decoded frame
switch (CurrentHWDecode) {
case HWDecode.CUDA:
case HWDecode.DXVA2:
//copy from GPU to CPU
retErr = ffmpeg.av_hwframe_transfer_data(pHWTransferFrame, pDecodedFrame, 0);
if (retErr == 0) {
//Convert from NV12 to RGBA
ffmpeg.sws_scale(pConvertContext, pHWTransferFrame->data, pHWTransferFrame->linesize, 0, height, dstData, dstLinesize);
}
break;
case HWDecode.D3D11:
//get handle to Texture2D and texture index
resource = (uint*)pDecodedFrame->data[0];
resourceIndex = (uint*)pDecodedFrame->data[1];
break;
case HWDecode.SW:
//Convert from NV12 to RGBA
ffmpeg.sws_scale(pConvertContext, pDecodedFrame->data, pDecodedFrame->linesize, 0, height, dstData, dstLinesize);
break;
}
}
else if (retErr == -11 || retErr == EndOfFileErrorCode) {
//skip frame.
}
else if (retErr < 0) {
string msg = GetFFmpegErrorMessage(retErr);
throw new ApplicationException($@"Error while receiving frame {frameNumber}\n Message: {msg}");
}
}
}
}
finally {
ffmpeg.av_packet_unref(pPacket);
ffmpeg.av_frame_unref(pDecodedFrame);
ffmpeg.av_frame_unref(pHWTransferFrame);
}
//wait for syncronisation from GenLock
GenLock.GenLockEvent.WaitOne();
//Update Image in WPF
if (CurrentHWDecode == HWDecode.D3D11)
UpdateImage((IntPtr)resource, (uint)resourceIndex);
else
UpdateImage(width, height, (IntPtr)convertedFrameBuffer, convertedFrameBufferSize, dstLinesize[0]);
}
}
}
convertedFrameBufferArray = null;
//flush decoder
packet.data = null;
packet.size = 0;
ffmpeg.avcodec_send_packet(pCodecContext, pPacket);
ffmpeg.av_packet_unref(pPacket);
//free frames
ffmpeg.av_frame_free(&pDecodedFrame);
ffmpeg.av_frame_free(&pHWTransferFrame);
ffmpeg.av_frame_free(&pConvertedFrame);
ffmpeg.sws_freeContext(pConvertContext);
//close input
WriteLine("close input");
ffmpeg.avformat_close_input(&pInputContext);
WriteLine("close codec");
ffmpeg.avcodec_close(pCodecContext);
WriteLine("Free D3D");
ShutdownD3D();
WriteLine("Close HW Frames");
ffmpeg.av_buffer_unref(&pCodecContext->hw_frames_ctx);
WriteLine("free codec");
ffmpeg.avcodec_free_context(&pCodecContext);
MediaStopped = true;
MediaStopping = true;
}
}
}