Some highly failed attempt to fix mkv support with lavc, and updated manual to include information on how to use FexTracker

Originally committed to SVN as r189.

core/mkv_wrap.cpp

@@ -128,7 +128,6 @@ void MatroskaWrapper::Parse() {
 	keyFrames.Clear();
 	bytePos.Clear();
 	timecodes.clear();
-	std::list<MkvFrame> frames;
 
 	// Get info
 	int tracks = mkv_GetNumTracks(file);
@@ -184,6 +183,11 @@ void MatroskaWrapper::Parse() {
 		}
 	}
 
+	// Copy raw
+	for (std::list<MkvFrame>::iterator cur=frames.begin();cur!=frames.end();cur++) {
+		rawFrames.push_back(*cur);
+	}
+
 	// Process timecodes and keyframes
 	frames.sort();
 	MkvFrame curFrame(false,0,0);

core/mkv_wrap.h

@@ -42,6 +42,7 @@
 #include <wx/wxprec.h>
 #include <stdio.h>
 #include <vector>
+#include <list>
 #include "MatroskaParser.h"
 #include "vfr.h"
 
@@ -78,8 +79,6 @@ bool operator < (MkvFrame &t1, MkvFrame &t2);
 // Matroska wrapper class
 class MatroskaWrapper {
 private:
-	MatroskaFile *file;
-	MkvStdIO *input;
 	wxArrayInt keyFrames;
 	std::vector<double> timecodes;
 	wxArrayInt bytePos;
@@ -87,6 +86,11 @@ private:
 	void Parse();
 
 public:
+	MkvStdIO *input;
+	MatroskaFile *file;
+	std::list<MkvFrame> frames;
+	std::vector<MkvFrame> rawFrames;
+
 	MatroskaWrapper();
 	~MatroskaWrapper();
 

core/subs_grid.cpp

@@ -36,6 +36,10 @@
 
 ////////////
 // Includes
+#include <algorithm>
+#include <wx/clipbrd.h>
+#include <wx/tokenzr.h>
+#include <wx/filename.h>
 #include "subs_grid.h"
 #include "ass_file.h"
 #include "ass_dialogue.h"
@@ -46,10 +50,7 @@
 #include "options.h"
 #include "frame_main.h"
 #include "hotkeys.h"
-#include <algorithm>
-#include <wx/clipbrd.h>
-#include <wx/tokenzr.h>
-#include <wx/filename.h>
+#include "utils.h"
 
 
 ///////////////
@@ -812,6 +813,9 @@ void SubtitlesGrid::DeleteLines(wxArrayInt target) {
 	AdjustScrollbar();
 	ass->FlagAsModified();
 	CommitChanges();
+
+	// Update editbox
+	editBox->SetToLine(MID(0,editBox->linen,GetRows()-1));
 }
 
 

core/subtitle_format_srt.cpp

@@ -162,6 +162,7 @@ void SRTSubtitleFormat::WriteFile(wxString _filename,wxString encoding) {
 		}
 		else throw _T("Unexpected line type");
 	}
+	ClearCopy();
 }
 
 

core/video_provider.h

@@ -37,6 +37,11 @@
 #pragma once
 
 
+//////////////
+// Prototypes
+class SubtitleRasterizer;
+
+
 ////////////////////////////
 // Video Provider interface
 class VideoProvider {
@@ -61,5 +66,7 @@ public:
 	virtual int GetSourceWidth()=0;			// Returns the original source width in pixels
 	virtual int GetSourceHeight()=0;		// Returns the original source height in pixels
 
+	SubtitleRasterizer *subsRaster;
+
 	static VideoProvider *GetProvider(wxString video,wxString subtitles);
 };

core/video_provider_lavc.cpp

@@ -38,6 +38,7 @@
 // Headers
 #ifdef USE_LAVC
 #include <wx/wxprec.h>
+#include <algorithm>
 #include "video_provider_lavc.h"
 #include "utils.h"
 #include "vfr.h"
@@ -125,15 +126,15 @@ void LAVCVideoProvider::LoadVideo(wxString filename) {
 		if (result < 0) throw _T("Failed to open video decoder");
 
 		// Check length
-		isVFR = false;
+		isMkv = false;
 		length = stream->duration;
 		if (length <= 0) {
 			if (strcmp(formatContext->iformat->name,"matroska") == 0) {
-				throw _T("FFmpeg fails at seeking Matroska. If you have any idea on how to fix it, Aegisub is open source.");
-				MatroskaWrapper::wrapper.Open(filename);
-				length = MatroskaWrapper::wrapper.GetFrameCount();
-				bytePos = MatroskaWrapper::wrapper.GetBytePositions();
-				isVFR = true;
+				//throw _T("FFmpeg fails at seeking Matroska. If you have any idea on how to fix it, Aegisub is open source.");
+				mkv.Open(filename);
+				length = mkv.GetFrameCount();
+				bytePos = mkv.GetBytePositions();
+				isMkv = true;
 			}
 			if (length <= 0) throw _T("Returned invalid stream length");
 		}
@@ -160,6 +161,9 @@ void LAVCVideoProvider::LoadVideo(wxString filename) {
 ///////////////
 // Close video
 void LAVCVideoProvider::Close() {
+	// Close mkv
+	if (isMkv) mkv.Close();
+
 	// Clean buffers
 	if (buffer1) delete buffer1;
 	if (buffer2) delete buffer2;
@@ -305,39 +309,60 @@ wxBitmap LAVCVideoProvider::GetFrame(int n) {
 	else {
 		// Prepare seek
 		__int64 seekTo;
-		int result;
+		int result = 0;
 
 		// Get time to seek to
-		if (isVFR) {
+		if (isMkv) {
 			//__int64 base = AV_TIME_BASE;
 			//__int64 time = VFR_Output.GetTimeAtFrame(n,true) * base / 1000000;
 			//seekTo = av_rescale(time,stream->time_base.den,AV_TIME_BASE * __int64(stream->time_base.num));
 			//seekTo = __int64(n) * 1000 * stream->r_frame_rate.den / stream->r_frame_rate.num;
-			seekTo = bytePos[n];
+			//seekTo = bytePos[n];
 
-			result = av_seek_frame(formatContext,vidStream,seekTo,AVSEEK_FLAG_BACKWARD | AVSEEK_FLAG_BYTE);
+			//result = av_seek_frame(formatContext,vidStream,seekTo,AVSEEK_FLAG_BACKWARD | AVSEEK_FLAG_BYTE);
+
+			// Prepare mkv seek
+			ulonglong startTime, endTime, filePos;
+			unsigned int rt, frameSize, frameFlags;
+			ulonglong targetTime = __int64(VFR_Output.GetTimeAtFrame(n,true,true))*1000000;
+			//ulonglong targetTime = __int64(n) * 1000 * stream->r_frame_rate.den / stream->r_frame_rate.num;
+			//ulonglong targetTime = mkv.rawFrames[n].time * 1000000;
+			mkv_Seek(mkv.file,targetTime,MKVF_SEEK_TO_PREV_KEYFRAME);
+
+			// Seek
+			if (mkv_ReadFrame(mkv.file,0,&rt,&startTime,&endTime,&filePos,&frameSize,&frameFlags) == 0) {
+				result = av_seek_frame(formatContext,vidStream,filePos,AVSEEK_FLAG_BYTE | AVSEEK_FLAG_BACKWARD);
+				int curpos = 0;
+				for (int i=0;i<mkv.rawFrames.size();i++) {
+					if (mkv.rawFrames[i].time == startTime / 1000000.0) curpos = i;
+				}
+				int seek = n - curpos;
+				for (int i=0;i<seek;i++) {
+					GetNextFrame();
+				}
+			}
 		}
 
 		// Constant frame rate
 		else {
 			seekTo = n;
 			result = av_seek_frame(formatContext,vidStream,seekTo,AVSEEK_FLAG_BACKWARD);
-		}
 
-		// Seek to keyframe
-		if (result == 0) {
-			avcodec_flush_buffers(codecContext);
+			// Seek to keyframe
+			if (result == 0) {
+				avcodec_flush_buffers(codecContext);
 
-			// Seek until final frame
-			bool ok = true;
-			do {
-				ok = GetNextFrame();
-			} while (lastDecodeTime <= n && ok);
-		}
+				// Seek until final frame
+				bool ok = true;
+				do {
+					ok = GetNextFrame();
+				} while (lastDecodeTime <= n && ok);
+			}
 
-		// Failed seeking
-		else {
-			GetNextFrame();
+			// Failed seeking
+			else {
+				GetNextFrame();
+			}
 		}
 	}
 

core/video_provider_lavc.h

@@ -52,12 +52,15 @@
 #include <ffmpeg/avcodec.h>
 #include <ffmpeg/avformat.h>
 #include "video_provider.h"
+#include "mkv_wrap.h"
 
 
 ///////////////////////
 // LibAVCodec provider
 class LAVCVideoProvider : public VideoProvider {
 private:
+	MatroskaWrapper mkv;
+
 	AVFormatContext *formatContext;
 	AVCodecContext *codecContext;
 	AVStream *stream;
@@ -72,7 +75,7 @@ private:
 
 	wxArrayInt bytePos;
 
-	bool isVFR;
+	bool isMkv;
 	__int64 lastDecodeTime;
 	int frameNumber;
 	int length;