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avfvideosrc: update caps if frame size has changed

Browse source 
On OSX, setting the pixel format on the output reset the capture device
to its native resolution, so we need to update the caps if the output
frame size has changed before a proper solution is found.
This commit is contained in:
Matthieu Bouron 2013-10-29 15:37:16 +00:00 committed by Andoni Morales Alastruey
parent fae79751ad
commit 35587efdc9
1 changed files with 32 additions and 3 deletions
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35
sys/applemedia/avfvideosrc.m
View file

@ -98,6 +98,7 @@ G_DEFINE_TYPE (GstAVFVideoSrc, gst_avf_video_src, GST_TYPE_PUSH_SRC);
NSMutableArray *bufQueue;
BOOL stopRequest;
GstCaps *caps;
GstVideoFormat format;
gint width, height;
GstClockTime duration;
@ -119,7 +120,7 @@ G_DEFINE_TYPE (GstAVFVideoSrc, gst_avf_video_src, GST_TYPE_PUSH_SRC);
- (BOOL)openDevice;
- (void)closeDevice;
- (GstCaps *)getCaps;
- (BOOL)setCaps:(GstCaps *)caps;
- (BOOL)setCaps:(GstCaps *)new_caps;
- (BOOL)start;
- (BOOL)stop;
- (BOOL)unlock;
@ -252,6 +253,9 @@ didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
[device release];
device = nil;
if (caps)
gst_caps_unref (caps);
});
}
@ -314,12 +318,12 @@ didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
return result;
}
- (BOOL)setCaps:(GstCaps *)caps
- (BOOL)setCaps:(GstCaps *)new_caps
{
GstVideoInfo info;
gst_video_info_init (&info);
gst_video_info_from_caps (&info, caps);
gst_video_info_from_caps (&info, new_caps);
width = info.width;
height = info.height;
@ -379,6 +383,7 @@ didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
output.videoSettings = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:newformat] forKey:(NSString*)kCVPixelBufferPixelFormatTypeKey];
caps = gst_caps_copy (new_caps);
[session startRunning];
});
@ -495,6 +500,9 @@ didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
- (GstFlowReturn)create:(GstBuffer **)buf
{
CMSampleBufferRef sbuf;
CVImageBufferRef image_buf;
CVPixelBufferRef pixel_buf;
size_t cur_width, cur_height;
[bufQueueLock lockWhenCondition:HAS_BUFFER_OR_STOP_REQUEST];
if (stopRequest) {
@ -508,6 +516,27 @@ didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
[bufQueueLock unlockWithCondition:
([bufQueue count] == 0) ? NO_BUFFERS : HAS_BUFFER_OR_STOP_REQUEST];
/* Check output frame size dimensions */
image_buf = CMSampleBufferGetImageBuffer (sbuf);
if (image_buf) {
pixel_buf = (CVPixelBufferRef) image_buf;
cur_width = CVPixelBufferGetWidth (pixel_buf);
cur_height = CVPixelBufferGetHeight (pixel_buf);
if (width != cur_width || height != cur_height) {
/* Set new caps according to current frame dimensions */
GST_WARNING ("Output frame size has changed %dx%d -> %dx%d, updating caps",
width, height, (int)cur_width, (int)cur_height);
width = cur_width;
height = cur_height;
gst_caps_set_simple (caps,
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
NULL);
gst_pad_push_event (GST_BASE_SINK_PAD (baseSrc), gst_event_new_caps (caps));
}
}
*buf = gst_core_media_buffer_new (sbuf);
CFRelease (sbuf);