X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftrunk%2Fsrc%2Fmodules%2Fmod_ffmpeg%2Fmptr_ffmpeg.cpp;h=f837c7bd83c8d5b82d30b4f2b02fc0a5de1dce34;hb=9459638ad6797b8139f1e9f0715c96076dbf0890;hp=bc4cc7b0b1db4257380e34fb478c44c8f97c64ea;hpb=9698bd80061a79c7f9e6940d2cfba7d34cd4c120;p=synfig.git

diff --git a/synfig-core/trunk/src/modules/mod_ffmpeg/mptr_ffmpeg.cpp b/synfig-core/trunk/src/modules/mod_ffmpeg/mptr_ffmpeg.cpp
index bc4cc7b..f837c7b 100644
--- a/synfig-core/trunk/src/modules/mod_ffmpeg/mptr_ffmpeg.cpp
+++ b/synfig-core/trunk/src/modules/mod_ffmpeg/mptr_ffmpeg.cpp
@@ -6,6 +6,7 @@
 **
 **	\legal
 **	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**	Copyright (c) 2007 Chris Moore
 **
 **	This package is free software; you can redistribute it and/or
 **	modify it under the terms of the GNU General Public License as
@@ -34,6 +35,20 @@
 #include <ETL/stringf>
 #include "mptr_ffmpeg.h"
 #include <stdio.h>
+#include <sys/types.h>
+#if HAVE_SYS_WAIT_H
+ #include <sys/wait.h>
+#endif
+#if HAVE_IO_H
+ #include <io.h>
+#endif
+#if HAVE_PROCESS_H
+ #include <process.h>
+#endif
+#if HAVE_FCNTL_H
+ #include <fcntl.h>
+#endif
+#include <unistd.h>
 #include <iostream>
 #include <algorithm>
 #include <functional>
@@ -46,6 +61,12 @@ using namespace synfig;
 using namespace std;
 using namespace etl;
 
+#if defined(HAVE_FORK) && defined(HAVE_PIPE) && defined(HAVE_WAITPID)
+ #define UNIX_PIPE_TO_PROCESSES
+#else
+ #define WIN32_PIPE_TO_PROCESSES
+#endif
+
 /* === G L O B A L S ======================================================= */
 
 SYNFIG_IMPORTER_INIT(ffmpeg_mptr);
@@ -56,6 +77,11 @@ SYNFIG_IMPORTER_SET_CVS_ID(ffmpeg_mptr,"$Id$");
 
 /* === M E T H O D S ======================================================= */
 
+bool ffmpeg_mptr::is_animated()
+{
+	return true;
+}
+
 bool
 ffmpeg_mptr::seek_to(int frame)
 {
@@ -63,15 +89,67 @@ ffmpeg_mptr::seek_to(int frame)
 	{
 		if(file)
 		{
+#if defined(WIN32_PIPE_TO_PROCESSES)
 			pclose(file);
+#elif defined(UNIX_PIPE_TO_PROCESSES)
+			fclose(file);
+			int status;
+			waitpid(pid,&status,0);
+#endif
 		}
 
+#if defined(WIN32_PIPE_TO_PROCESSES)
+
 		string command;
 
-		command=strprintf("ffmpeg -i \"%s\" -an -f image2pipe -vcodec ppm -\n",filename.c_str());
+		command=strprintf("ffmpeg -ss 00:00:00.%d -i \"%s\" -an -f image2pipe -vcodec ppm -\n",frame,filename.c_str());
 
 		file=popen(command.c_str(),POPEN_BINARY_READ_TYPE);
 
+#elif defined(UNIX_PIPE_TO_PROCESSES)
+
+		int p[2];
+
+		if (pipe(p)) {
+			cerr<<"Unable to open pipe to ffmpeg"<<endl;
+			return false;
+		};
+
+		pid = fork();
+
+		if (pid == -1) {
+			cerr<<"Unable to open pipe to ffmpeg"<<endl;
+			return false;
+		}
+
+		if (pid == 0){
+			// Child process
+			// Close pipein, not needed
+			close(p[0]);
+			// Dup pipein to stdout
+			if( dup2( p[1], STDOUT_FILENO ) == -1 ){
+				cerr<<"Unable to open pipe to ffmpeg"<<endl;
+				return false;
+			}
+			// Close the unneeded pipein
+			close(p[1]);
+			string time = strprintf("00:00:00.%d",frame);
+			execlp("ffmpeg", "ffmpeg", "-ss", time.c_str(), "-i", filename.c_str(), "-an", "-f", "image2pipe", "-vcodec", "ppm", "-", (const char *)NULL);
+			// We should never reach here unless the exec failed
+			cerr<<"Unable to open pipe to ffmpeg"<<endl;
+			_exit(1);
+		} else {
+			// Parent process
+			// Close pipeout, not needed
+			close(p[1]);
+			// Save pipein to file handle, will read from it later
+			file = fdopen(p[0], "rb");
+		}
+
+#else
+	#error There are no known APIs for creating child processes
+#endif
+
 		if(!file)
 		{
 			cerr<<"Unable to open pipe to ffmpeg"<<endl;
@@ -101,6 +179,10 @@ ffmpeg_mptr::grab_frame(void)
 	float divisor;
 	char cookie[2];
 	cookie[0]=fgetc(file);
+
+	if(feof(file))
+		return false;
+
 	cookie[1]=fgetc(file);
 
 	if(cookie[0]!='P' || cookie[1]!='6')
@@ -148,6 +230,7 @@ ffmpeg_mptr::grab_frame(void)
 
 ffmpeg_mptr::ffmpeg_mptr(const char *f)
 {
+	pid=-1;
 #ifdef HAVE_TERMIOS_H
 	tcgetattr (0, &oldtty);
 #endif
@@ -160,7 +243,15 @@ ffmpeg_mptr::ffmpeg_mptr(const char *f)
 ffmpeg_mptr::~ffmpeg_mptr()
 {
 	if(file)
+	{
+#if defined(WIN32_PIPE_TO_PROCESSES)
 		pclose(file);
+#elif defined(UNIX_PIPE_TO_PROCESSES)
+		fclose(file);
+		int status;
+		waitpid(pid,&status,0);
+#endif
+	}
 #ifdef HAVE_TERMIOS_H
 	tcsetattr(0,TCSANOW,&oldtty);
 #endif
@@ -174,10 +265,10 @@ ffmpeg_mptr::get_frame(synfig::Surface &surface,Time time, synfig::ProgressCallb
 	{
 		if(!seek_to(i))
 			return false;
-		if(!grab_frame());
+		if(!grab_frame())
 			return false;
 	}
 
 	surface=frame;
-	return false;
+	return true;
 }