Functionnal API header, just missing everything else :)

modules/sample_module/libsample_module.so

+libsample_module.so.1.0.0
\ No newline at end of file

modules/sample_module/libsample_module.so.1

+libsample_module.so.1.0.0
\ No newline at end of file

modules/sample_module/libsample_module.so.1.0

+libsample_module.so.1.0.0
\ No newline at end of file

modules/sample_module/main.cpp

+#include "../../src/API/vlmc_module.h"
+
+vlmc_module_begin()
+vlmc_module_end()
+
+static  vlmc_return_type_t  Open( void* pv_module )
+{
+
+}
+

modules/sample_module/sample_module.pro

+QT       -= core gui
+
+TARGET = sample_module
+CONFIG   += dll
+CONFIG   -= app_bundle
+
+TEMPLATE = lib
+DEFINES += VLMC_MODULE
+
+
+SOURCES += main.cpp

src/API/vlmc_module.h

+/*****************************************************************************
+ * vlcm_module.h: Header to be used by effects modules
+ *****************************************************************************
+ * Copyright (C) 2008-2009 the VLMC team
+ *
+ * Authors: Hugo Beauzee-Luyssen <hugo@vlmc.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifndef VLMC_MODULE_H
+#define VLMC_MODULE_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+typedef struct
+{
+    /* Output buffer */
+    unsigned char*      p_buffer;
+    /* Output width */
+    unsigned int        i_width;
+    /* Output height */
+    unsigned int        i_height;
+}   vlmc_output_t;
+
+enum        vlmc_return_type_t
+{
+    VLMC_SUCCESS = 0,
+    VLMC_INVALID_INPUT_PARAMETER,
+    VLMC_OUT_OF_MEMORY,
+    VLMC_UNEXPECTED_ERROR,
+};
+
+typedef     vlmc_return_type_t  (*open_callback_t)( void* );
+typedef     vlmc_return_type_t  (*close_callback_t)( void* );
+typedef     vlmc_return_type_t  (*process_callback_t)( unsigned char*, unsigned int );
+
+typedef struct
+{
+    open_callback_t     pf_open;
+    close_callback_t    pf_close;
+    process_callback_t  pf_process;
+}   vlmc_callback_t;
+
+typedef struct
+{
+    char*               psz_name;
+    float               f_ratio;
+    vlmc_output_t*      p_output;
+    vlmc_callback_t*    p_callbacks;
+}   vlmc_module_t;
+
+#define CPP_CONCATENACK( a, b )  y##__##z
+#define CONCATENATE( a, b ) CPP_CONCATENACK( a, b )
+
+#if defined(VLMC_MODULE) && defined( WIN32 )
+#define VLMC_EXPORT     __declspec(dllexport)
+#else
+    #define VLMC_EXPORT
+#endif
+
+#define     vlmc_module_begin()                                                             \
+    VLMC_EXPORT vlmc_return_type_t vlmc_module_entrypoint( vlmc_module_t* p_module )        \
+    {
+
+#define     vlmc_module_end()           \
+    return VLMC_SUCCESS;                \
+    }
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif // VLMC_MODULE_H

src/gui/PreviewWidget.cpp

@@ -236,12 +236,12 @@ void    PreviewWidget::changedTab( int tabId )
 
 void        PreviewWidget::on_pushButtonNextFrame_clicked()
 {
-    if ( m_previewStopped == false )
+    if ( m_previewStopped == true )
         m_currentPreviewRenderer->nextFrame();
 }
 
 void        PreviewWidget::on_pushButtonPreviousFrame_clicked()
 {
-    if ( m_previewStopped == false )
+    if ( m_previewStopped == true )
         m_currentPreviewRenderer->previousFrame();
 }

vlmc.pro

@@ -77,7 +77,8 @@ HEADERS += src/gui/MainWindow.h \
     src/gui/PreviewWidget.h \
     src/gui/RenderPreviewWidget.h \
     src/gui/GenericPreviewWidget.h \
-    src/tools/Toggleable.hpp
+    src/tools/Toggleable.hpp \
+    src/API/vlmc_module.h
 FORMS += src/gui/ui/MainWindow.ui \
     src/gui/ui/PreviewWidget.ui \
     src/gui/ui/Preferences.ui \
@@ -97,5 +98,7 @@ INCLUDEPATH += src/LibVLCpp \
     src
 LIBS = -L/usr/local/lib \
     -lvlc
+SUBDIRS +=  modules
+
 CODECFORTR = UTF-8
 include(locale.pri)