LAVCFile

Originally committed to SVN as r325.

core/Makefile.am

@@ -59,6 +59,7 @@ aegisub_SOURCES = about.cpp \
 	frame_main_events.cpp \
 	hilimod_textctrl.cpp \
 	hotkeys.cpp \
+	lavc_file.cpp \
 	main.cpp \
 	md5.c \
 	mkv_wrap.cpp \

core/lavc_file.cpp

@@ -0,0 +1,65 @@
+// Copyright (c) 2005, Rodrigo Braz Monteiro
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//   * Redistributions of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//   * Redistributions in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//   * Neither the name of the Aegisub Group nor the names of its contributors
+//     may be used to endorse or promote products derived from this software
+//     without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+// -----------------------------------------------------------------------------
+//
+// AEGISUB
+//
+// Website: http://aegisub.cellosoft.com
+// Contact: mailto:zeratul@cellosoft.com
+//
+
+
+#include "lavc_file.h"
+
+#ifdef USE_LAVC
+
+LAVCFile::LAVCFile(wxString filename)
+{
+	int result = 0;
+	fctx = NULL;
+
+	result = av_open_input_file(&fctx,filename.mb_str(wxConvLocal),NULL,0,NULL);
+	if (result != 0) throw _T("Failed opening file.");
+
+	// Get stream info
+	result = av_find_stream_info(fctx);
+	if (result < 0) {
+		av_close_input_file(fctx);
+		fctx = NULL;
+		throw _T("Unable to read stream info");
+	}
+	refs = 1;
+}
+
+LAVCFile::~LAVCFile()
+{
+	if (fctx)
+		av_close_input_file(fctx);
+}
+
+#endif

core/lavc_file.h

@@ -0,0 +1,60 @@
+// Copyright (c) 2005, Rodrigo Braz Monteiro
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//   * Redistributions of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//   * Redistributions in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//   * Neither the name of the Aegisub Group nor the names of its contributors
+//     may be used to endorse or promote products derived from this software
+//     without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+// -----------------------------------------------------------------------------
+//
+// AEGISUB
+//
+// Website: http://aegisub.cellosoft.com
+// Contact: mailto:zeratul@cellosoft.com
+//
+
+
+#pragma once
+
+#ifndef LAVC_FILE_H
+#define LAVC_FILE_H
+
+#include <ffmpeg/avcodec.h>
+#include <ffmpeg/avformat.h>
+
+class LAVCFile {
+private:
+	unsigned refs;
+
+	LAVCFile(wxString filename);
+	~LAVCFile();
+public:
+	AVFormatContext *fctx;
+	
+	static LAVCFile *Create(wxString filename) { return new LAVCFile(filename); }
+	LAVCFile *AddRef() { refs++; return this; };
+	void Release() { if (!--refs) delete this; };
+};
+
+#endif /* LAVC_FILE_H */
+

core/video_provider_lavc.cpp

@@ -50,7 +50,7 @@
 LAVCVideoProvider::LAVCVideoProvider(wxString filename, wxString subfilename) {
 	// Init variables
 	codecContext = NULL;
-	formatContext = NULL;
+	lavcfile = NULL;
 	codec = NULL;
 	stream = NULL;
 	frame = NULL;
@@ -87,24 +87,18 @@ void LAVCVideoProvider::LoadVideo(wxString filename) {
 	// Close first
 	Close();
 
+	lavcfile = LAVCFile::Create(filename);
 	// Load
 	try {
-		// Open file
 		int result = 0;
-		result = av_open_input_file(&formatContext,filename.mb_str(wxConvLocal),NULL,0,NULL);
-		if (result != 0) throw _T("Failed opening file.");
-
-		// Get stream info
-		result = av_find_stream_info(formatContext);
-		if (result < 0) throw _T("Unable to read stream info");
 
 		// Find video stream
 		vidStream = -1;
 		codecContext = NULL;
-		for (int i=0;i<formatContext->nb_streams;i++) {
-			codecContext = formatContext->streams[i]->codec;
+		for (int i=0;i<lavcfile->fctx->nb_streams;i++) {
+			codecContext = lavcfile->fctx->streams[i]->codec;
 			if (codecContext->codec_type == CODEC_TYPE_VIDEO) {
-				stream = formatContext->streams[i];
+				stream = lavcfile->fctx->streams[i];
 				vidStream = i;
 				break;
 			}
@@ -179,8 +173,9 @@ void LAVCVideoProvider::Close() {
 	codec = NULL;
 
 	// Close format context
-	if (formatContext) av_close_input_file(formatContext);
-	formatContext = NULL;
+	if (lavcfile)
+		lavcfile->Release();
+	lavcfile = NULL;
 }
 
 
@@ -198,7 +193,7 @@ void LAVCVideoProvider::UpdateDisplaySize() {
 bool LAVCVideoProvider::GetNextFrame() {
 	// Read packet
 	AVPacket packet;
-	while (av_read_frame(formatContext, &packet)>=0) {
+	while (av_read_frame(lavcfile->fctx, &packet)>=0) {
 		// Check if packet is part of video stream
 		if(packet.stream_index == vidStream) {
 			// Decode frame
@@ -359,7 +354,7 @@ wxBitmap LAVCVideoProvider::GetFrame(int n) {
 		// Constant frame rate
 		else {
 			seekTo = n;
-			result = av_seek_frame(formatContext,vidStream,seekTo,AVSEEK_FLAG_BACKWARD);
+			result = av_seek_frame(lavcfile->fctx,vidStream,seekTo,AVSEEK_FLAG_BACKWARD);
 
 			// Seek to keyframe
 			if (result == 0) {

core/video_provider_lavc.h

@@ -53,6 +53,7 @@
 #include <ffmpeg/avformat.h>
 #include "video_provider.h"
 #include "mkv_wrap.h"
+#include "lavc_file.h"
 
 
 ///////////////////////
@@ -61,7 +62,7 @@ class LAVCVideoProvider : public VideoProvider {
 private:
 	MatroskaWrapper mkv;
 
-	AVFormatContext *formatContext;
+	LAVCFile *lavcfile;
 	AVCodecContext *codecContext;
 	AVStream *stream;
 	AVCodec *codec;