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Mac Hack to get list of supported resolutions from negotiated caps.

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This commit is contained in:
codeanticode
2012-08-28 22:41:02 +00:00
parent 60e11e02e5
commit 54e0b8399d
1 changed files with 51 additions and 34 deletions
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java/libraries/video/src/processing/video/Capture.java
+51 -34
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@@ -54,10 +54,10 @@ import org.gstreamer.interfaces.Property;
* @webref video
* @usage application
*/
public class Capture extends PImage implements PConstants {
public static String sourceElementName;
public static String devicePropertyName;
public static String indexPropertyName;
public class Capture extends PImage implements PConstants {
protected static String sourceElementName;
protected static String devicePropertyName;
protected static String indexPropertyName;
// Default gstreamer capture plugin for each platform, and property names.
static {
if (PApplet.platform == MACOSX) {
@@ -77,6 +77,8 @@ public class Capture extends PImage implements PConstants {
indexPropertyName = "device-fd";
} else {}
}
protected static boolean useResMacHack = true;
public float frameRate;
public Pipeline pipeline;
@@ -85,8 +87,6 @@ public class Capture extends PImage implements PConstants {
protected String frameRateString;
protected int bufWidth;
protected int bufHeight;
protected String deviceIdName;
protected Object deviceIdValue;
protected String sourceName;
protected Element sourceElement;
@@ -513,7 +513,7 @@ public class Capture extends PImage implements PConstants {
testPipeline.getState();
ArrayList<String> resolutions = new ArrayList<String>();
addResFromSource(resolutions, source, propertyName, propertyValue);
addResFromSource(resolutions, source);
testPipeline.stop();
testPipeline.getState();
@@ -529,32 +529,21 @@ public class Capture extends PImage implements PConstants {
}
static protected void addResFromSource(ArrayList<String> res, Element src,
String propertyName, Object propertyValue) {
static protected void addResFromSource(ArrayList<String> res, Element src) {
if (PApplet.platform == MACOSX && useResMacHack) {
addResFromSourceMacHack(res, src);
} else {
addResFromSourceImpl(res, src);
}
}
static protected void addResFromSourceImpl(ArrayList<String> res, Element src) {
for (Pad pad : src.getPads()) {
//Caps caps = pad.getCaps();
//Caps caps = pad.getNegotiatedCaps();
Caps caps = pad.getNegotiatedCaps();
Caps caps = pad.getCaps();
int n = caps.size();
for (int i = 0; i < n; i++) {
Structure str = caps.getStructure(i);
PApplet.println(str);
if (propertyName != null && str.hasField(propertyName)) {
Object value = str.getValue(propertyName);
if (value instanceof String) {
String strValue = (String)value;
String checkValue = (String)propertyValue;
if (!strValue.equals(checkValue)) continue;
} else if (value instanceof Integer) {
Integer intValue = (Integer)value;
Integer checkValue = (Integer)propertyValue;
if (intValue != checkValue) continue;
}
}
if (!str.hasIntField("width") || !str.hasIntField("height")) continue;
@@ -568,12 +557,42 @@ public class Capture extends PImage implements PConstants {
addResFromString(res, str.toString(), w, h);
} else {
addResFromStructure(res, str, w, h);
}
}
}
}
}
// The problem on OSX, at least when using qtkitvideosrc, is that it is only
// possible to obtain a single supported caps, the native maximum, using
// getNegotiatedCaps. getCaps() just gives the maximum possible ranges that
// are useless to build a list of supported resolutions. Using the fact that
// QTKit allows to capture streams at arbitrary resolutions, then the list is
// faked by repeatedly dividing the maximum by 2 until the width becomes too
// small (or not divisible by 2).
static protected void addResFromSourceMacHack(ArrayList<String> res, Element src) {
for (Pad pad : src.getPads()) {
Caps caps = pad.getNegotiatedCaps();
int n = caps.size();
if (0 < n) {
Structure str = caps.getStructure(0);
if (!str.hasIntField("width") || !str.hasIntField("height")) return;
int w = ((Integer)str.getValue("width")).intValue();
int h = ((Integer)str.getValue("height")).intValue();
while (80 <= w) {
addResFromStructure(res, str, w, h);
if (w % 2 == 0 && h % 2 == 0) {
w /= 2;
h /= 2;
} else {
break;
}
}
}
}
}
static protected void addResFromString(ArrayList<String> res, String str, int w, int h) {
int n0 = str.indexOf("framerate=(fraction)");
@@ -668,7 +687,7 @@ public class Capture extends PImage implements PConstants {
protected void checkResIsValid() {
ArrayList<String> resolutions = new ArrayList<String>();
addResFromSource(resolutions, sourceElement, deviceIdName, deviceIdValue);
addResFromSource(resolutions, sourceElement);
boolean valid = resolutions.size() == 0;
for (String res: resolutions) {
@@ -758,8 +777,6 @@ public class Capture extends PImage implements PConstants {
if (idName != null && !idName.equals("")) {
sourceElement.set(idName, idValue);
deviceIdName = idName;
deviceIdValue = idValue;
}
bufWidth = bufHeight = 0;