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avfvideosrc: account for retina displays when capturing screens

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Fixes: https://bugzilla.gnome.org/show_bug.cgi?id=770030
This commit is contained in:
Florian Zwoch 2016-08-19 19:46:24 +10:00 committed by Alessandro Decina
parent c42eb9932e
commit 6de83e0515
1 changed files with 18 additions and 2 deletions
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20
sys/applemedia/avfvideosrc.m
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@ -138,6 +138,7 @@ G_DEFINE_TYPE (GstAVFVideoSrc, gst_avf_video_src, GST_TYPE_PUSH_SRC);
- (GstVideoFormat)getGstVideoFormat:(NSNumber *)pixel_format;
#if !HAVE_IOS
- (CGDirectDisplayID)getDisplayIdFromDeviceIndex;
- (float)getScaleFactorFromDeviceIndex;
#endif
- (GstCaps *)getDeviceCaps;
- (BOOL)setDeviceCaps:(GstVideoInfo *)info;
@ -416,6 +417,20 @@ didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
displayId = [description objectForKey:@"NSScreenNumber"];
return [displayId unsignedIntegerValue];
}
- (float)getScaleFactorFromDeviceIndex
{
NSArray *screens = [NSScreen screens];
if (deviceIndex == DEFAULT_DEVICE_INDEX)
return [[NSScreen mainScreen] backingScaleFactor];
if (deviceIndex >= [screens count]) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("Invalid screen capture device index"), (NULL));
return 1.0;
}
return [[screens objectAtIndex:deviceIndex] backingScaleFactor];
}
#endif
- (GstCaps *)getDeviceCaps
@ -648,12 +663,13 @@ didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
if (captureScreen) {
#if !HAVE_IOS
CGRect rect = CGDisplayBounds ([self getDisplayIdFromDeviceIndex]);
float scale = [self getScaleFactorFromDeviceIndex];
for (NSNumber *pixel_format in pixel_formats) {
GstVideoFormat gst_format = [self getGstVideoFormat:pixel_format];
if (gst_format != GST_VIDEO_FORMAT_UNKNOWN)
gst_caps_append (result, gst_caps_new_simple ("video/x-raw",
"width", G_TYPE_INT, (int)rect.size.width,
"height", G_TYPE_INT, (int)rect.size.height,
"width", G_TYPE_INT, (int)(rect.size.width * scale),
"height", G_TYPE_INT, (int)(rect.size.height * scale),
"format", G_TYPE_STRING, gst_video_format_to_string (gst_format),
NULL));
}