processing/java/libraries/video/src/processing/video/Video.java at master · wntd/processing · GitHub

Repository navigation

History

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */

Part of the Processing project - http://processing.org

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library 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

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General

Public License along with this library; if not, write to the

Free Software Foundation, Inc., 59 Temple Place, Suite 330,

Boston, MA 02111-1307 USA

package processing.video;

import org.gstreamer.*;

import processing.core.PApplet;

import processing.core.PConstants;

import java.io.File;

import java.nio.ByteOrder;

import java.util.List;

/**

* This class contains some basic functions used by the rest of the classes in

* this library.

public class Video implements PConstants {

// Path that the video library will use to load the GStreamer base libraries

// and plugins from. They can be passed from the application using the

// gstreamer.library.path and gstreamer.plugin.path system variables (see

// comments in initImpl() below).

protected static String gstreamerLibPath = "";

protected static String gstreamerPluginPath = "";

// Direct buffer pass enabled by default. With this mode enabled, no new

// buffers are created and disposed by the GC in each frame (thanks to Octavi

// Estape for suggesting this improvement) which should help performance in

// most situations.

protected static boolean passDirectBuffer = true;

// OpenGL texture used as buffer sink by default, when the renderer is

// GL-based. This can improve performance significantly, since the video

// frames are automatically copied into the texture without passing through

// the pixels arrays, as well as having the color conversion into RGBA handled

// natively by GStreamer.

protected static boolean useGLBufferSink = true;

protected static boolean defaultGLibContext = false;

protected static long INSTANCES_COUNT = 0;

protected static int bitsJVM;

static {

bitsJVM = PApplet.parseInt(System.getProperty("sun.arch.data.model"));

}

static protected void init() {

if (INSTANCES_COUNT == 0) {

initImpl();

}

INSTANCES_COUNT++;

}

static protected void restart() {

removePlugins();

Gst.deinit();

initImpl();

}

static protected void initImpl() {

// The location of the GStreamer base libraries can be passed from the

// application to the vide library via a system variable. In Eclipse, add to

// "VM Arguments" in "Run Configurations" the following line:

// -Dgstreamer.library.path=path

String libPath = System.getProperty("gstreamer.library.path");

if (libPath != null) {

gstreamerLibPath = libPath;

// If the GStreamer installation referred by gstreamer.library.path is not

// a system installation, then the path containing the plugins needs to be

// specified separately, otherwise the plugins will be automatically

// loaded from the default location. The system property for the plugin

// path is "gstreamer.plugin.path"

String pluginPath = System.getProperty("gstreamer.plugin.path");

if (pluginPath != null) {

gstreamerPluginPath = pluginPath;

}

} else {

// Paths are build automatically from the curren location of the video

// library.

if (PApplet.platform == LINUX) {

buildLinuxPaths();

} else if (PApplet.platform == WINDOWS) {

buildWindowsPaths();

} else if (PApplet.platform == MACOSX) {

buildMacOSXPaths();

}

if (!gstreamerLibPath.equals("")) {

System.setProperty("jna.library.path", gstreamerLibPath);

}

if (PApplet.platform == WINDOWS) {

LibraryLoader loader = LibraryLoader.getInstance();

if (loader == null) {

System.err.println("Cannot load local version of GStreamer libraries.");

}

String[] args = { "" };

Gst.setUseDefaultContext(defaultGLibContext);

Gst.init("Processing core video", args);

addPlugins();

}

static protected void addPlugins() {

if (!gstreamerPluginPath.equals("")) {

Registry reg = Registry.getDefault();

boolean res;

res = reg.scanPath(gstreamerPluginPath);

if (!res) {

System.err.println("Cannot load GStreamer plugins from " +

gstreamerPluginPath);

}

static protected void removePlugins() {

Registry reg = Registry.getDefault();

List<Plugin> list = reg.getPluginList();

for (Plugin plg : list) {

reg.removePlugin(plg);

}

static protected void buildLinuxPaths() {

gstreamerLibPath = "";

gstreamerPluginPath = "";

}

static protected void buildWindowsPaths() {

LibraryPath libPath = new LibraryPath();

String path = libPath.get();

gstreamerLibPath = buildGStreamerLibPath(path, "\\windows" + bitsJVM);

gstreamerPluginPath = gstreamerLibPath + "\\plugins";

}

static protected void buildMacOSXPaths() {

LibraryPath libPath = new LibraryPath();

String path = libPath.get();

gstreamerLibPath = buildGStreamerLibPath(path, "/macosx" + bitsJVM);

gstreamerPluginPath = gstreamerLibPath + "/plugins";

}

static protected String buildGStreamerLibPath(String base, String os) {

File path = new File(base + os);

if (path.exists()) {

return base + os;

} else {

return base;

}

static protected float nanoSecToSecFrac(float nanosec) {

for (int i = 0; i < 3; i++)

nanosec /= 1E3;

return nanosec;

}

static protected long secToNanoLong(float sec) {

Float f = new Float(sec * 1E9);

return f.longValue();

}

/**

* Reorders an OpenGL pixel array (RGBA) into ARGB. The array must be

* of size width * height.

* @param pixels int[]

static protected void convertToARGB(int[] pixels, int width, int height) {

int t = 0;

int p = 0;

if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN) {

// RGBA to ARGB conversion: shifting RGB 8 bits to the right,

// and placing A 24 bits to the left.

for (int y = 0; y < height; y++) {

for (int x = 0; x < width; x++) {

int pixel = pixels[p++];

pixels[t++] = (pixel >>> 8) | ((pixel << 24) & 0xFF000000);

}

} else {

// We have to convert ABGR into ARGB, so R and B must be swapped,

// A and G just brought back in.

for (int y = 0; y < height; y++) {

for (int x = 0; x < width; x++) {

int pixel = pixels[p++];

pixels[t++] = ((pixel & 0xFF) << 16) | ((pixel & 0xFF0000) >> 16) |

(pixel & 0xFF00FF00);

}

processing/java/libraries/video/src/processing/video/Video.java at master · wntd/processing · GitHub

Repository navigation

Expand file tree

Breadcrumbs

Video.java

Latest commit

History

Breadcrumbs

Video.java

File metadata and controls