mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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1299 lines
37 KiB
Objective-C
1299 lines
37 KiB
Objective-C
/*
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* Copyright (C) 2010 Ole André Vadla Ravnås <oleavr@soundrop.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "avfvideosrc.h"
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#import <AVFoundation/AVFoundation.h>
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#include <gst/video/video.h>
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#include <gst/gl/gstglcontext.h>
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#include "coremediabuffer.h"
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#include "corevideotexturecache.h"
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#define DEFAULT_DEVICE_INDEX -1
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#define DEFAULT_DO_STATS FALSE
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#define DEVICE_FPS_N 25
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#define DEVICE_FPS_D 1
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#define BUFFER_QUEUE_SIZE 2
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GST_DEBUG_CATEGORY (gst_avf_video_src_debug);
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#define GST_CAT_DEFAULT gst_avf_video_src_debug
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw, "
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"format = (string) { NV12, UYVY, YUY2 }, "
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"framerate = " GST_VIDEO_FPS_RANGE ", "
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"width = " GST_VIDEO_SIZE_RANGE ", "
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"height = " GST_VIDEO_SIZE_RANGE "; "
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"video/x-raw, "
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"format = (string) BGRA, "
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"framerate = " GST_VIDEO_FPS_RANGE ", "
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"width = " GST_VIDEO_SIZE_RANGE ", "
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"height = " GST_VIDEO_SIZE_RANGE "; "
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GST_VIDEO_CAPS_MAKE_WITH_FEATURES
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(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
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"RGBA") "; "
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));
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typedef enum _QueueState {
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NO_BUFFERS = 1,
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HAS_BUFFER_OR_STOP_REQUEST,
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} QueueState;
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#define gst_avf_video_src_parent_class parent_class
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G_DEFINE_TYPE (GstAVFVideoSrc, gst_avf_video_src, GST_TYPE_PUSH_SRC);
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@interface GstAVFVideoSrcImpl : NSObject <AVCaptureVideoDataOutputSampleBufferDelegate> {
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GstElement *element;
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GstBaseSrc *baseSrc;
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GstPushSrc *pushSrc;
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gint deviceIndex;
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BOOL doStats;
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#if !HAVE_IOS
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CGDirectDisplayID displayId;
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#endif
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AVCaptureSession *session;
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AVCaptureInput *input;
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AVCaptureVideoDataOutput *output;
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AVCaptureDevice *device;
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CMClockRef inputClock;
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dispatch_queue_t mainQueue;
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dispatch_queue_t workerQueue;
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NSConditionLock *bufQueueLock;
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NSMutableArray *bufQueue;
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BOOL stopRequest;
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GstCaps *caps;
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GstVideoFormat format;
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gint width, height;
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GstClockTime latency;
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guint64 offset;
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GstClockTime startAVFTimestamp;
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GstClockTime startTimestamp;
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GstClockTime lastSampling;
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guint count;
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gint fps;
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BOOL captureScreen;
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BOOL captureScreenCursor;
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BOOL captureScreenMouseClicks;
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BOOL useVideoMeta;
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GstCoreVideoTextureCache *textureCache;
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}
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- (id)init;
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- (id)initWithSrc:(GstPushSrc *)src;
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- (void)finalize;
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@property int deviceIndex;
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@property BOOL doStats;
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@property int fps;
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@property BOOL captureScreen;
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@property BOOL captureScreenCursor;
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@property BOOL captureScreenMouseClicks;
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- (BOOL)openScreenInput;
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- (BOOL)openDeviceInput;
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- (BOOL)openDevice;
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- (void)closeDevice;
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- (GstVideoFormat)getGstVideoFormat:(NSNumber *)pixel_format;
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- (BOOL)getDeviceCaps:(GstCaps *)result;
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- (BOOL)setDeviceCaps:(GstVideoInfo *)info;
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- (BOOL)getSessionPresetCaps:(GstCaps *)result;
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- (BOOL)setSessionPresetCaps:(GstVideoInfo *)info;
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- (GstCaps *)getCaps;
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- (BOOL)setCaps:(GstCaps *)new_caps;
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- (BOOL)start;
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- (BOOL)stop;
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- (BOOL)unlock;
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- (BOOL)unlockStop;
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- (BOOL)query:(GstQuery *)query;
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- (GstStateChangeReturn)changeState:(GstStateChange)transition;
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- (GstFlowReturn)create:(GstBuffer **)buf;
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- (void)updateStatistics;
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- (void)captureOutput:(AVCaptureOutput *)captureOutput
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didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
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fromConnection:(AVCaptureConnection *)connection;
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@end
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@implementation GstAVFVideoSrcImpl
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@synthesize deviceIndex, doStats, fps, captureScreen,
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captureScreenCursor, captureScreenMouseClicks;
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- (id)init
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{
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return [self initWithSrc:NULL];
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}
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- (id)initWithSrc:(GstPushSrc *)src
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{
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if ((self = [super init])) {
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element = GST_ELEMENT_CAST (src);
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baseSrc = GST_BASE_SRC_CAST (src);
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pushSrc = src;
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deviceIndex = DEFAULT_DEVICE_INDEX;
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captureScreen = NO;
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captureScreenCursor = NO;
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captureScreenMouseClicks = NO;
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useVideoMeta = NO;
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textureCache = NULL;
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#if !HAVE_IOS
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displayId = kCGDirectMainDisplay;
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#endif
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mainQueue =
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dispatch_queue_create ("org.freedesktop.gstreamer.avfvideosrc.main", NULL);
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workerQueue =
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dispatch_queue_create ("org.freedesktop.gstreamer.avfvideosrc.output", NULL);
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gst_base_src_set_live (baseSrc, TRUE);
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gst_base_src_set_format (baseSrc, GST_FORMAT_TIME);
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}
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return self;
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}
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- (void)finalize
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{
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dispatch_release (mainQueue);
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mainQueue = NULL;
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dispatch_release (workerQueue);
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workerQueue = NULL;
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[super finalize];
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}
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- (BOOL)openDeviceInput
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{
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NSString *mediaType = AVMediaTypeVideo;
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NSError *err;
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if (deviceIndex == -1) {
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device = [AVCaptureDevice defaultDeviceWithMediaType:mediaType];
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if (device == nil) {
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GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
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("No video capture devices found"), (NULL));
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return NO;
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}
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} else {
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NSArray *devices = [AVCaptureDevice devicesWithMediaType:mediaType];
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if (deviceIndex >= [devices count]) {
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GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
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("Invalid video capture device index"), (NULL));
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return NO;
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}
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device = [devices objectAtIndex:deviceIndex];
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}
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g_assert (device != nil);
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[device retain];
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GST_INFO ("Opening '%s'", [[device localizedName] UTF8String]);
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input = [AVCaptureDeviceInput deviceInputWithDevice:device
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error:&err];
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if (input == nil) {
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GST_ELEMENT_ERROR (element, RESOURCE, BUSY,
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("Failed to open device: %s",
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[[err localizedDescription] UTF8String]),
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(NULL));
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[device release];
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device = nil;
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return NO;
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}
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[input retain];
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return YES;
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}
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- (BOOL)openScreenInput
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{
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#if HAVE_IOS
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return NO;
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#else
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GST_DEBUG_OBJECT (element, "Opening screen input");
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AVCaptureScreenInput *screenInput =
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[[AVCaptureScreenInput alloc] initWithDisplayID:displayId];
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@try {
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[screenInput setValue:[NSNumber numberWithBool:captureScreenCursor]
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forKey:@"capturesCursor"];
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} @catch (NSException *exception) {
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if (![[exception name] isEqualToString:NSUndefinedKeyException]) {
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GST_WARNING ("An unexpected error occured: %s",
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[[exception reason] UTF8String]);
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}
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GST_WARNING ("Capturing cursor is only supported in OS X >= 10.8");
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}
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screenInput.capturesMouseClicks = captureScreenMouseClicks;
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input = screenInput;
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[input retain];
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return YES;
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#endif
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}
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- (BOOL)openDevice
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{
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BOOL success = NO, *successPtr = &success;
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GST_DEBUG_OBJECT (element, "Opening device");
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dispatch_sync (mainQueue, ^{
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BOOL ret;
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if (captureScreen)
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ret = [self openScreenInput];
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else
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ret = [self openDeviceInput];
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if (!ret)
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return;
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output = [[AVCaptureVideoDataOutput alloc] init];
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[output setSampleBufferDelegate:self
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queue:workerQueue];
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output.alwaysDiscardsLateVideoFrames = YES;
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output.videoSettings = nil; /* device native format */
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session = [[AVCaptureSession alloc] init];
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[session addInput:input];
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[session addOutput:output];
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*successPtr = YES;
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});
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GST_DEBUG_OBJECT (element, "Opening device %s", success ? "succeed" : "failed");
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return success;
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}
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- (void)closeDevice
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{
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GST_DEBUG_OBJECT (element, "Closing device");
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dispatch_sync (mainQueue, ^{
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g_assert (![session isRunning]);
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[session removeInput:input];
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[session removeOutput:output];
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[session release];
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session = nil;
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[input release];
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input = nil;
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[output release];
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output = nil;
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if (!captureScreen) {
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[device release];
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device = nil;
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}
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if (caps)
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gst_caps_unref (caps);
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});
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}
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#define GST_AVF_CAPS_NEW(format, w, h, fps_n, fps_d) \
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(gst_caps_new_simple ("video/x-raw", \
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"width", G_TYPE_INT, w, \
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"height", G_TYPE_INT, h, \
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"format", G_TYPE_STRING, gst_video_format_to_string (format), \
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"framerate", GST_TYPE_FRACTION, (fps_n), (fps_d), \
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NULL))
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- (GstVideoFormat)getGstVideoFormat:(NSNumber *)pixel_format
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{
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GstVideoFormat gst_format = GST_VIDEO_FORMAT_UNKNOWN;
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switch ([pixel_format integerValue]) {
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case kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange: /* 420v */
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gst_format = GST_VIDEO_FORMAT_NV12;
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break;
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case kCVPixelFormatType_422YpCbCr8: /* 2vuy */
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gst_format = GST_VIDEO_FORMAT_UYVY;
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break;
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case kCVPixelFormatType_32BGRA: /* BGRA */
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gst_format = GST_VIDEO_FORMAT_BGRA;
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break;
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case kCVPixelFormatType_32RGBA: /* RGBA */
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gst_format = GST_VIDEO_FORMAT_RGBA;
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break;
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case kCVPixelFormatType_422YpCbCr8_yuvs: /* yuvs */
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gst_format = GST_VIDEO_FORMAT_YUY2;
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break;
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default:
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GST_LOG_OBJECT (element, "Pixel format %s is not handled by avfvideosrc",
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[[pixel_format stringValue] UTF8String]);
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break;
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}
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return gst_format;
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}
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- (BOOL)getDeviceCaps:(GstCaps *)result
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{
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NSArray *formats = [device valueForKey:@"formats"];
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NSArray *pixel_formats = output.availableVideoCVPixelFormatTypes;
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GST_DEBUG_OBJECT (element, "Getting device caps");
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/* Do not use AVCaptureDeviceFormat or AVFrameRateRange only
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* available in iOS >= 7.0. We use a dynamic approach with key-value
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* coding or performSelector */
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for (NSObject *f in [formats reverseObjectEnumerator]) {
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CMFormatDescriptionRef formatDescription;
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CMVideoDimensions dimensions;
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/* formatDescription can't be retrieved with valueForKey so use a selector here */
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formatDescription = (CMFormatDescriptionRef) [f performSelector:@selector(formatDescription)];
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dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
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for (NSObject *rate in [f valueForKey:@"videoSupportedFrameRateRanges"]) {
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int fps_n, fps_d;
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gdouble max_fps;
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[[rate valueForKey:@"maxFrameRate"] getValue:&max_fps];
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gst_util_double_to_fraction (max_fps, &fps_n, &fps_d);
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for (NSNumber *pixel_format in pixel_formats) {
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GstVideoFormat gst_format = [self getGstVideoFormat:pixel_format];
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if (gst_format != GST_VIDEO_FORMAT_UNKNOWN)
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gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, dimensions.width, dimensions.height, fps_n, fps_d));
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if (gst_format == GST_VIDEO_FORMAT_BGRA) {
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GstCaps *rgba_caps = GST_AVF_CAPS_NEW (GST_VIDEO_FORMAT_RGBA, dimensions.width, dimensions.height, fps_n, fps_d);
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gst_caps_set_features (rgba_caps, 0, gst_caps_features_new (GST_CAPS_FEATURE_MEMORY_GL_MEMORY, NULL));
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gst_caps_append (result, rgba_caps);
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}
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}
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}
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}
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GST_LOG_OBJECT (element, "Device returned the following caps %" GST_PTR_FORMAT, result);
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return YES;
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}
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- (BOOL)setDeviceCaps:(GstVideoInfo *)info
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{
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double framerate;
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gboolean found_format = FALSE, found_framerate = FALSE;
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NSArray *formats = [device valueForKey:@"formats"];
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gst_util_fraction_to_double (info->fps_n, info->fps_d, &framerate);
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GST_DEBUG_OBJECT (element, "Setting device caps");
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if ([device lockForConfiguration:NULL] == YES) {
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for (NSObject *f in formats) {
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CMFormatDescriptionRef formatDescription;
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CMVideoDimensions dimensions;
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formatDescription = (CMFormatDescriptionRef) [f performSelector:@selector(formatDescription)];
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dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
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if (dimensions.width == info->width && dimensions.height == info->height) {
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found_format = TRUE;
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[device setValue:f forKey:@"activeFormat"];
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for (NSObject *rate in [f valueForKey:@"videoSupportedFrameRateRanges"]) {
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gdouble max_frame_rate;
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[[rate valueForKey:@"maxFrameRate"] getValue:&max_frame_rate];
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if (abs (framerate - max_frame_rate) < 0.00001) {
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NSValue *min_frame_duration, *max_frame_duration;
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found_framerate = TRUE;
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min_frame_duration = [rate valueForKey:@"minFrameDuration"];
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max_frame_duration = [rate valueForKey:@"maxFrameDuration"];
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[device setValue:min_frame_duration forKey:@"activeVideoMinFrameDuration"];
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@try {
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/* Only available on OSX >= 10.8 and iOS >= 7.0 */
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[device setValue:max_frame_duration forKey:@"activeVideoMaxFrameDuration"];
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} @catch (NSException *exception) {
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if (![[exception name] isEqualToString:NSUndefinedKeyException]) {
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GST_WARNING ("An unexcepted error occured: %s",
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[exception.reason UTF8String]);
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}
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}
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break;
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}
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}
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}
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}
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if (!found_format) {
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GST_WARNING ("Unsupported capture dimensions %dx%d", info->width, info->height);
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return NO;
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}
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if (!found_framerate) {
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GST_WARNING ("Unsupported capture framerate %d/%d", info->fps_n, info->fps_d);
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return NO;
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}
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} else {
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GST_WARNING ("Couldn't lock device for configuration");
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return NO;
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}
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return YES;
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}
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- (BOOL)getSessionPresetCaps:(GstCaps *)result
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{
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NSArray *pixel_formats = output.availableVideoCVPixelFormatTypes;
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for (NSNumber *pixel_format in pixel_formats) {
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GstVideoFormat gst_format = [self getGstVideoFormat:pixel_format];
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if (gst_format == GST_VIDEO_FORMAT_UNKNOWN)
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continue;
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#if HAVE_IOS
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if ([session canSetSessionPreset:AVCaptureSessionPreset1920x1080])
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gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 1920, 1080, DEVICE_FPS_N, DEVICE_FPS_D));
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#endif
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if ([session canSetSessionPreset:AVCaptureSessionPreset1280x720])
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gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 1280, 720, DEVICE_FPS_N, DEVICE_FPS_D));
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if ([session canSetSessionPreset:AVCaptureSessionPreset640x480])
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gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 640, 480, DEVICE_FPS_N, DEVICE_FPS_D));
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if ([session canSetSessionPreset:AVCaptureSessionPresetMedium])
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gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 480, 360, DEVICE_FPS_N, DEVICE_FPS_D));
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if ([session canSetSessionPreset:AVCaptureSessionPreset352x288])
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gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 352, 288, DEVICE_FPS_N, DEVICE_FPS_D));
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if ([session canSetSessionPreset:AVCaptureSessionPresetLow])
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gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 192, 144, DEVICE_FPS_N, DEVICE_FPS_D));
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}
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GST_LOG_OBJECT (element, "Session presets returned the following caps %" GST_PTR_FORMAT, result);
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return YES;
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}
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- (BOOL)setSessionPresetCaps:(GstVideoInfo *)info;
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{
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GST_DEBUG_OBJECT (element, "Setting session presset caps");
|
|
|
|
if ([device lockForConfiguration:NULL] != YES) {
|
|
GST_WARNING ("Couldn't lock device for configuration");
|
|
return NO;
|
|
}
|
|
|
|
switch (info->width) {
|
|
case 192:
|
|
session.sessionPreset = AVCaptureSessionPresetLow;
|
|
break;
|
|
case 352:
|
|
session.sessionPreset = AVCaptureSessionPreset352x288;
|
|
break;
|
|
case 480:
|
|
session.sessionPreset = AVCaptureSessionPresetMedium;
|
|
break;
|
|
case 640:
|
|
session.sessionPreset = AVCaptureSessionPreset640x480;
|
|
break;
|
|
case 1280:
|
|
session.sessionPreset = AVCaptureSessionPreset1280x720;
|
|
break;
|
|
#if HAVE_IOS
|
|
case 1920:
|
|
session.sessionPreset = AVCaptureSessionPreset1920x1080;
|
|
break;
|
|
#endif
|
|
default:
|
|
GST_WARNING ("Unsupported capture dimensions %dx%d", info->width, info->height);
|
|
return NO;
|
|
}
|
|
return YES;
|
|
}
|
|
|
|
- (GstCaps *)getCaps
|
|
{
|
|
GstCaps *result;
|
|
NSArray *pixel_formats;
|
|
|
|
if (session == nil)
|
|
return NULL; /* BaseSrc will return template caps */
|
|
|
|
result = gst_caps_new_empty ();
|
|
pixel_formats = output.availableVideoCVPixelFormatTypes;
|
|
|
|
if (captureScreen) {
|
|
#if !HAVE_IOS
|
|
CGRect rect = CGDisplayBounds (displayId);
|
|
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,
|
|
"format", G_TYPE_STRING, gst_video_format_to_string (gst_format),
|
|
NULL));
|
|
}
|
|
#else
|
|
GST_WARNING ("Screen capture is not supported by iOS");
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
@try {
|
|
|
|
[self getDeviceCaps:result];
|
|
|
|
} @catch (NSException *exception) {
|
|
|
|
if (![[exception name] isEqualToString:NSUndefinedKeyException]) {
|
|
GST_WARNING ("An unexcepted error occured: %s", [exception.reason UTF8String]);
|
|
return result;
|
|
}
|
|
|
|
/* Fallback on session presets API for iOS < 7.0 */
|
|
[self getSessionPresetCaps:result];
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
- (BOOL)setCaps:(GstCaps *)new_caps
|
|
{
|
|
GstVideoInfo info;
|
|
BOOL success = YES, *successPtr = &success;
|
|
|
|
gst_video_info_init (&info);
|
|
gst_video_info_from_caps (&info, new_caps);
|
|
|
|
width = info.width;
|
|
height = info.height;
|
|
format = info.finfo->format;
|
|
latency = gst_util_uint64_scale (GST_SECOND, info.fps_d, info.fps_n);
|
|
|
|
dispatch_sync (mainQueue, ^{
|
|
int newformat;
|
|
|
|
g_assert (![session isRunning]);
|
|
|
|
if (captureScreen) {
|
|
#if !HAVE_IOS
|
|
AVCaptureScreenInput *screenInput = (AVCaptureScreenInput *)input;
|
|
screenInput.minFrameDuration = CMTimeMake(info.fps_d, info.fps_n);
|
|
#else
|
|
GST_WARNING ("Screen capture is not supported by iOS");
|
|
*successPtr = NO;
|
|
return;
|
|
#endif
|
|
} else {
|
|
@try {
|
|
|
|
/* formats and activeFormat keys are only available on OSX >= 10.7 and iOS >= 7.0 */
|
|
*successPtr = [self setDeviceCaps:(GstVideoInfo *)&info];
|
|
if (*successPtr != YES)
|
|
return;
|
|
|
|
} @catch (NSException *exception) {
|
|
|
|
if (![[exception name] isEqualToString:NSUndefinedKeyException]) {
|
|
GST_WARNING ("An unexcepted error occured: %s", [exception.reason UTF8String]);
|
|
*successPtr = NO;
|
|
return;
|
|
}
|
|
|
|
/* Fallback on session presets API for iOS < 7.0 */
|
|
*successPtr = [self setSessionPresetCaps:(GstVideoInfo *)&info];
|
|
if (*successPtr != YES)
|
|
return;
|
|
}
|
|
}
|
|
|
|
switch (format) {
|
|
case GST_VIDEO_FORMAT_NV12:
|
|
newformat = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
|
|
break;
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
newformat = kCVPixelFormatType_422YpCbCr8;
|
|
break;
|
|
case GST_VIDEO_FORMAT_YUY2:
|
|
newformat = kCVPixelFormatType_422YpCbCr8_yuvs;
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBA:
|
|
/* In order to do RGBA, we negotiate BGRA (since RGBA is not supported
|
|
* if not in textures) and then we get RGBA textures via
|
|
* CVOpenGL*TextureCacheCreateTextureFromImage. Computers. */
|
|
case GST_VIDEO_FORMAT_BGRA:
|
|
newformat = kCVPixelFormatType_32BGRA;
|
|
break;
|
|
default:
|
|
*successPtr = NO;
|
|
GST_WARNING ("Unsupported output format %s",
|
|
gst_video_format_to_string (format));
|
|
return;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT(element,
|
|
"Width: %d Height: %d Format: %" GST_FOURCC_FORMAT,
|
|
width, height,
|
|
GST_FOURCC_ARGS (gst_video_format_to_fourcc (format)));
|
|
|
|
output.videoSettings = [NSDictionary
|
|
dictionaryWithObject:[NSNumber numberWithInt:newformat]
|
|
forKey:(NSString*)kCVPixelBufferPixelFormatTypeKey];
|
|
|
|
caps = gst_caps_copy (new_caps);
|
|
[session startRunning];
|
|
|
|
/* Unlock device configuration only after session is started so the session
|
|
* won't reset the capture formats */
|
|
[device unlockForConfiguration];
|
|
});
|
|
|
|
return success;
|
|
}
|
|
|
|
- (BOOL)start
|
|
{
|
|
bufQueueLock = [[NSConditionLock alloc] initWithCondition:NO_BUFFERS];
|
|
bufQueue = [[NSMutableArray alloc] initWithCapacity:BUFFER_QUEUE_SIZE];
|
|
stopRequest = NO;
|
|
|
|
offset = 0;
|
|
latency = GST_CLOCK_TIME_NONE;
|
|
startAVFTimestamp = GST_CLOCK_TIME_NONE;
|
|
startTimestamp = GST_CLOCK_TIME_NONE;
|
|
inputClock = nil;
|
|
|
|
lastSampling = GST_CLOCK_TIME_NONE;
|
|
count = 0;
|
|
fps = -1;
|
|
|
|
return YES;
|
|
}
|
|
|
|
- (BOOL)stop
|
|
{
|
|
dispatch_sync (mainQueue, ^{ [session stopRunning]; });
|
|
dispatch_sync (workerQueue, ^{});
|
|
|
|
[bufQueueLock release];
|
|
bufQueueLock = nil;
|
|
[bufQueue release];
|
|
bufQueue = nil;
|
|
inputClock = nil;
|
|
|
|
if (textureCache)
|
|
gst_core_video_texture_cache_free (textureCache);
|
|
textureCache = NULL;
|
|
|
|
return YES;
|
|
}
|
|
|
|
- (BOOL)query:(GstQuery *)query
|
|
{
|
|
BOOL result = NO;
|
|
|
|
if (GST_QUERY_TYPE (query) == GST_QUERY_LATENCY) {
|
|
if (device != nil) {
|
|
GstClockTime min_latency, max_latency;
|
|
|
|
min_latency = max_latency = latency;
|
|
result = YES;
|
|
|
|
GST_DEBUG_OBJECT (element, "reporting latency of min %" GST_TIME_FORMAT
|
|
" max %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
|
|
gst_query_set_latency (query, TRUE, min_latency, max_latency);
|
|
}
|
|
} else {
|
|
result = GST_BASE_SRC_CLASS (parent_class)->query (baseSrc, query);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
- (BOOL)decideAllocation:(GstQuery *)query
|
|
{
|
|
useVideoMeta = gst_query_find_allocation_meta (query,
|
|
GST_VIDEO_META_API_TYPE, NULL);
|
|
|
|
guint idx;
|
|
if (gst_query_find_allocation_meta (query,
|
|
GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, &idx)) {
|
|
GstGLContext *context;
|
|
const GstStructure *upload_meta_params;
|
|
|
|
gst_query_parse_nth_allocation_meta (query, idx, &upload_meta_params);
|
|
if (gst_structure_get (upload_meta_params, "gst.gl.GstGLContext",
|
|
GST_GL_TYPE_CONTEXT, &context, NULL) && context) {
|
|
GstCaps *query_caps;
|
|
GstCapsFeatures *features;
|
|
|
|
gst_query_parse_allocation (query, &query_caps, NULL);
|
|
features = gst_caps_get_features (query_caps, 0);
|
|
if (gst_caps_features_contains (features, GST_CAPS_FEATURE_MEMORY_GL_MEMORY)) {
|
|
textureCache = gst_core_video_texture_cache_new (context);
|
|
gst_core_video_texture_cache_set_format (textureCache,
|
|
"NV12", query_caps);
|
|
}
|
|
gst_object_unref (context);
|
|
}
|
|
}
|
|
|
|
return YES;
|
|
}
|
|
|
|
- (BOOL)unlock
|
|
{
|
|
[bufQueueLock lock];
|
|
stopRequest = YES;
|
|
[bufQueueLock unlockWithCondition:HAS_BUFFER_OR_STOP_REQUEST];
|
|
|
|
return YES;
|
|
}
|
|
|
|
- (BOOL)unlockStop
|
|
{
|
|
[bufQueueLock lock];
|
|
stopRequest = NO;
|
|
[bufQueueLock unlock];
|
|
|
|
return YES;
|
|
}
|
|
|
|
- (GstStateChangeReturn)changeState:(GstStateChange)transition
|
|
{
|
|
GstStateChangeReturn ret;
|
|
|
|
if (transition == GST_STATE_CHANGE_NULL_TO_READY) {
|
|
if (![self openDevice])
|
|
return GST_STATE_CHANGE_FAILURE;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
if (transition == GST_STATE_CHANGE_READY_TO_NULL)
|
|
[self closeDevice];
|
|
|
|
return ret;
|
|
}
|
|
|
|
- (void)captureOutput:(AVCaptureOutput *)captureOutput
|
|
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
|
|
fromConnection:(AVCaptureConnection *)connection
|
|
{
|
|
GstClockTime timestamp, duration;
|
|
|
|
[bufQueueLock lock];
|
|
|
|
if (stopRequest) {
|
|
[bufQueueLock unlock];
|
|
return;
|
|
}
|
|
|
|
if (inputClock == nil)
|
|
inputClock = ((AVCaptureInputPort *)connection.inputPorts[0]).clock;
|
|
[self getSampleBuffer:sampleBuffer timestamp:×tamp duration:&duration];
|
|
|
|
if ([bufQueue count] == BUFFER_QUEUE_SIZE)
|
|
[bufQueue removeLastObject];
|
|
|
|
[bufQueue insertObject:@{@"sbuf": (id)sampleBuffer,
|
|
@"timestamp": @(timestamp),
|
|
@"duration": @(duration)}
|
|
atIndex:0];
|
|
|
|
[bufQueueLock unlockWithCondition:HAS_BUFFER_OR_STOP_REQUEST];
|
|
}
|
|
|
|
- (GstFlowReturn)create:(GstBuffer **)buf
|
|
{
|
|
CMSampleBufferRef sbuf;
|
|
CVImageBufferRef image_buf;
|
|
CVPixelBufferRef pixel_buf;
|
|
size_t cur_width, cur_height;
|
|
GstClockTime timestamp, duration;
|
|
|
|
[bufQueueLock lockWhenCondition:HAS_BUFFER_OR_STOP_REQUEST];
|
|
if (stopRequest) {
|
|
[bufQueueLock unlock];
|
|
return GST_FLOW_FLUSHING;
|
|
}
|
|
|
|
NSDictionary *dic = (NSDictionary *) [bufQueue lastObject];
|
|
sbuf = (CMSampleBufferRef) dic[@"sbuf"];
|
|
timestamp = (GstClockTime) [dic[@"timestamp"] longLongValue];
|
|
duration = (GstClockTime) [dic[@"duration"] longLongValue];
|
|
CFRetain (sbuf);
|
|
[bufQueue removeLastObject];
|
|
[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, useVideoMeta, textureCache == NULL);
|
|
if (format == GST_VIDEO_FORMAT_RGBA) {
|
|
/* So now buf contains BGRA data (!) . Since downstream is actually going to
|
|
* use the GL upload meta to get RGBA textures (??), we need to override the
|
|
* VideoMeta format (!!!). Yes this is confusing, see setCaps: */
|
|
GstVideoMeta *video_meta = gst_buffer_get_video_meta (*buf);
|
|
if (video_meta) {
|
|
video_meta->format = format;
|
|
}
|
|
}
|
|
CFRelease (sbuf);
|
|
|
|
if (textureCache != NULL)
|
|
*buf = gst_core_video_texture_cache_get_gl_buffer (textureCache, *buf);
|
|
|
|
GST_BUFFER_OFFSET (*buf) = offset++;
|
|
GST_BUFFER_OFFSET_END (*buf) = GST_BUFFER_OFFSET (buf) + 1;
|
|
GST_BUFFER_TIMESTAMP (*buf) = timestamp;
|
|
GST_BUFFER_DURATION (*buf) = duration;
|
|
|
|
if (doStats)
|
|
[self updateStatistics];
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
- (void)getSampleBuffer:(CMSampleBufferRef)sbuf
|
|
timestamp:(GstClockTime *)outTimestamp
|
|
duration:(GstClockTime *)outDuration
|
|
{
|
|
CMSampleTimingInfo time_info;
|
|
GstClockTime timestamp, duration, inputClockNow, running_time;
|
|
CMItemCount num_timings;
|
|
GstClock *clock;
|
|
CMTime now;
|
|
|
|
timestamp = GST_CLOCK_TIME_NONE;
|
|
duration = GST_CLOCK_TIME_NONE;
|
|
if (CMSampleBufferGetOutputSampleTimingInfoArray(sbuf, 1, &time_info, &num_timings) == noErr) {
|
|
timestamp = gst_util_uint64_scale (GST_SECOND,
|
|
time_info.presentationTimeStamp.value, time_info.presentationTimeStamp.timescale);
|
|
|
|
if (CMTIME_IS_VALID (time_info.duration) && time_info.duration.timescale != 0)
|
|
duration = gst_util_uint64_scale (GST_SECOND,
|
|
time_info.duration.value, time_info.duration.timescale);
|
|
|
|
now = CMClockGetTime(inputClock);
|
|
inputClockNow = gst_util_uint64_scale (GST_SECOND,
|
|
now.value, now.timescale);
|
|
|
|
GST_OBJECT_LOCK (element);
|
|
clock = GST_ELEMENT_CLOCK (element);
|
|
running_time = gst_clock_get_time (clock) - element->base_time;
|
|
timestamp = running_time + (inputClockNow - timestamp);
|
|
GST_OBJECT_UNLOCK (element);
|
|
}
|
|
|
|
*outTimestamp = timestamp;
|
|
*outDuration = duration;
|
|
}
|
|
|
|
- (void)updateStatistics
|
|
{
|
|
GstClock *clock;
|
|
|
|
GST_OBJECT_LOCK (element);
|
|
clock = GST_ELEMENT_CLOCK (element);
|
|
if (clock != NULL)
|
|
gst_object_ref (clock);
|
|
GST_OBJECT_UNLOCK (element);
|
|
|
|
if (clock != NULL) {
|
|
GstClockTime now = gst_clock_get_time (clock);
|
|
gst_object_unref (clock);
|
|
|
|
count++;
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (lastSampling)) {
|
|
if (now - lastSampling >= GST_SECOND) {
|
|
GST_OBJECT_LOCK (element);
|
|
fps = count;
|
|
GST_OBJECT_UNLOCK (element);
|
|
|
|
g_object_notify (G_OBJECT (element), "fps");
|
|
|
|
lastSampling = now;
|
|
count = 0;
|
|
}
|
|
} else {
|
|
lastSampling = now;
|
|
}
|
|
}
|
|
}
|
|
|
|
@end
|
|
|
|
/*
|
|
* Glue code
|
|
*/
|
|
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_DEVICE_INDEX,
|
|
PROP_DO_STATS,
|
|
PROP_FPS,
|
|
#if !HAVE_IOS
|
|
PROP_CAPTURE_SCREEN,
|
|
PROP_CAPTURE_SCREEN_CURSOR,
|
|
PROP_CAPTURE_SCREEN_MOUSE_CLICKS,
|
|
#endif
|
|
};
|
|
|
|
|
|
static void gst_avf_video_src_finalize (GObject * obj);
|
|
static void gst_avf_video_src_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec);
|
|
static void gst_avf_video_src_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec);
|
|
static GstStateChangeReturn gst_avf_video_src_change_state (
|
|
GstElement * element, GstStateChange transition);
|
|
static GstCaps * gst_avf_video_src_get_caps (GstBaseSrc * basesrc,
|
|
GstCaps * filter);
|
|
static gboolean gst_avf_video_src_set_caps (GstBaseSrc * basesrc,
|
|
GstCaps * caps);
|
|
static gboolean gst_avf_video_src_start (GstBaseSrc * basesrc);
|
|
static gboolean gst_avf_video_src_stop (GstBaseSrc * basesrc);
|
|
static gboolean gst_avf_video_src_query (GstBaseSrc * basesrc,
|
|
GstQuery * query);
|
|
static gboolean gst_avf_video_src_decide_allocation (GstBaseSrc * basesrc,
|
|
GstQuery * query);
|
|
static gboolean gst_avf_video_src_unlock (GstBaseSrc * basesrc);
|
|
static gboolean gst_avf_video_src_unlock_stop (GstBaseSrc * basesrc);
|
|
static GstFlowReturn gst_avf_video_src_create (GstPushSrc * pushsrc,
|
|
GstBuffer ** buf);
|
|
static gboolean gst_avf_video_src_negotiate (GstBaseSrc * basesrc);
|
|
|
|
|
|
static void
|
|
gst_avf_video_src_class_init (GstAVFVideoSrcClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
GstBaseSrcClass *gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
|
|
GstPushSrcClass *gstpushsrc_class = GST_PUSH_SRC_CLASS (klass);
|
|
|
|
gobject_class->finalize = gst_avf_video_src_finalize;
|
|
gobject_class->get_property = gst_avf_video_src_get_property;
|
|
gobject_class->set_property = gst_avf_video_src_set_property;
|
|
|
|
gstelement_class->change_state = gst_avf_video_src_change_state;
|
|
|
|
gstbasesrc_class->get_caps = gst_avf_video_src_get_caps;
|
|
gstbasesrc_class->set_caps = gst_avf_video_src_set_caps;
|
|
gstbasesrc_class->start = gst_avf_video_src_start;
|
|
gstbasesrc_class->stop = gst_avf_video_src_stop;
|
|
gstbasesrc_class->query = gst_avf_video_src_query;
|
|
gstbasesrc_class->unlock = gst_avf_video_src_unlock;
|
|
gstbasesrc_class->unlock_stop = gst_avf_video_src_unlock_stop;
|
|
gstbasesrc_class->decide_allocation = gst_avf_video_src_decide_allocation;
|
|
gstbasesrc_class->negotiate = gst_avf_video_src_negotiate;
|
|
|
|
gstpushsrc_class->create = gst_avf_video_src_create;
|
|
|
|
gst_element_class_set_metadata (gstelement_class,
|
|
"Video Source (AVFoundation)", "Source/Video",
|
|
"Reads frames from an iOS AVFoundation device",
|
|
"Ole André Vadla Ravnås <oleavr@soundrop.com>");
|
|
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&src_template));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_DEVICE_INDEX,
|
|
g_param_spec_int ("device-index", "Device Index",
|
|
"The zero-based device index",
|
|
-1, G_MAXINT, DEFAULT_DEVICE_INDEX,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_DO_STATS,
|
|
g_param_spec_boolean ("do-stats", "Enable statistics",
|
|
"Enable logging of statistics", DEFAULT_DO_STATS,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_FPS,
|
|
g_param_spec_int ("fps", "Frames per second",
|
|
"Last measured framerate, if statistics are enabled",
|
|
-1, G_MAXINT, -1, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
|
|
#if !HAVE_IOS
|
|
g_object_class_install_property (gobject_class, PROP_CAPTURE_SCREEN,
|
|
g_param_spec_boolean ("capture-screen", "Enable screen capture",
|
|
"Enable screen capture functionality", FALSE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_CAPTURE_SCREEN_CURSOR,
|
|
g_param_spec_boolean ("capture-screen-cursor", "Capture screen cursor",
|
|
"Enable cursor capture while capturing screen", FALSE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_CAPTURE_SCREEN_MOUSE_CLICKS,
|
|
g_param_spec_boolean ("capture-screen-mouse-clicks", "Enable mouse clicks capture",
|
|
"Enable mouse clicks capture while capturing screen", FALSE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
#endif
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_avf_video_src_debug, "avfvideosrc",
|
|
0, "iOS AVFoundation video source");
|
|
}
|
|
|
|
#define OBJC_CALLOUT_BEGIN() \
|
|
NSAutoreleasePool *pool; \
|
|
\
|
|
pool = [[NSAutoreleasePool alloc] init]
|
|
#define OBJC_CALLOUT_END() \
|
|
[pool release]
|
|
|
|
|
|
static void
|
|
gst_avf_video_src_init (GstAVFVideoSrc * src)
|
|
{
|
|
OBJC_CALLOUT_BEGIN ();
|
|
src->impl = [[GstAVFVideoSrcImpl alloc] initWithSrc:GST_PUSH_SRC (src)];
|
|
OBJC_CALLOUT_END ();
|
|
}
|
|
|
|
static void
|
|
gst_avf_video_src_finalize (GObject * obj)
|
|
{
|
|
OBJC_CALLOUT_BEGIN ();
|
|
[GST_AVF_VIDEO_SRC_IMPL (obj) release];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (obj);
|
|
}
|
|
|
|
static void
|
|
gst_avf_video_src_get_property (GObject * object, guint prop_id, GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstAVFVideoSrcImpl *impl = GST_AVF_VIDEO_SRC_IMPL (object);
|
|
|
|
switch (prop_id) {
|
|
#if !HAVE_IOS
|
|
case PROP_CAPTURE_SCREEN:
|
|
g_value_set_boolean (value, impl.captureScreen);
|
|
break;
|
|
case PROP_CAPTURE_SCREEN_CURSOR:
|
|
g_value_set_boolean (value, impl.captureScreenCursor);
|
|
break;
|
|
case PROP_CAPTURE_SCREEN_MOUSE_CLICKS:
|
|
g_value_set_boolean (value, impl.captureScreenMouseClicks);
|
|
break;
|
|
#endif
|
|
case PROP_DEVICE_INDEX:
|
|
g_value_set_int (value, impl.deviceIndex);
|
|
break;
|
|
case PROP_DO_STATS:
|
|
g_value_set_boolean (value, impl.doStats);
|
|
break;
|
|
case PROP_FPS:
|
|
GST_OBJECT_LOCK (object);
|
|
g_value_set_int (value, impl.fps);
|
|
GST_OBJECT_UNLOCK (object);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_avf_video_src_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstAVFVideoSrcImpl *impl = GST_AVF_VIDEO_SRC_IMPL (object);
|
|
|
|
switch (prop_id) {
|
|
#if !HAVE_IOS
|
|
case PROP_CAPTURE_SCREEN:
|
|
impl.captureScreen = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_CAPTURE_SCREEN_CURSOR:
|
|
impl.captureScreenCursor = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_CAPTURE_SCREEN_MOUSE_CLICKS:
|
|
impl.captureScreenMouseClicks = g_value_get_boolean (value);
|
|
break;
|
|
#endif
|
|
case PROP_DEVICE_INDEX:
|
|
impl.deviceIndex = g_value_get_int (value);
|
|
break;
|
|
case PROP_DO_STATS:
|
|
impl.doStats = g_value_get_boolean (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_avf_video_src_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret;
|
|
|
|
OBJC_CALLOUT_BEGIN ();
|
|
ret = [GST_AVF_VIDEO_SRC_IMPL (element) changeState: transition];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_avf_video_src_get_caps (GstBaseSrc * basesrc, GstCaps * filter)
|
|
{
|
|
GstCaps *ret;
|
|
|
|
OBJC_CALLOUT_BEGIN ();
|
|
ret = [GST_AVF_VIDEO_SRC_IMPL (basesrc) getCaps];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_avf_video_src_set_caps (GstBaseSrc * basesrc, GstCaps * caps)
|
|
{
|
|
gboolean ret;
|
|
|
|
OBJC_CALLOUT_BEGIN ();
|
|
ret = [GST_AVF_VIDEO_SRC_IMPL (basesrc) setCaps:caps];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_avf_video_src_start (GstBaseSrc * basesrc)
|
|
{
|
|
gboolean ret;
|
|
|
|
OBJC_CALLOUT_BEGIN ();
|
|
ret = [GST_AVF_VIDEO_SRC_IMPL (basesrc) start];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_avf_video_src_stop (GstBaseSrc * basesrc)
|
|
{
|
|
gboolean ret;
|
|
|
|
OBJC_CALLOUT_BEGIN ();
|
|
ret = [GST_AVF_VIDEO_SRC_IMPL (basesrc) stop];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_avf_video_src_query (GstBaseSrc * basesrc, GstQuery * query)
|
|
{
|
|
gboolean ret;
|
|
|
|
OBJC_CALLOUT_BEGIN ();
|
|
ret = [GST_AVF_VIDEO_SRC_IMPL (basesrc) query:query];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_avf_video_src_decide_allocation (GstBaseSrc * basesrc, GstQuery * query)
|
|
{
|
|
gboolean ret;
|
|
|
|
OBJC_CALLOUT_BEGIN ();
|
|
ret = [GST_AVF_VIDEO_SRC_IMPL (basesrc) decideAllocation:query];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_avf_video_src_unlock (GstBaseSrc * basesrc)
|
|
{
|
|
gboolean ret;
|
|
|
|
OBJC_CALLOUT_BEGIN ();
|
|
ret = [GST_AVF_VIDEO_SRC_IMPL (basesrc) unlock];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_avf_video_src_unlock_stop (GstBaseSrc * basesrc)
|
|
{
|
|
gboolean ret;
|
|
|
|
OBJC_CALLOUT_BEGIN ();
|
|
ret = [GST_AVF_VIDEO_SRC_IMPL (basesrc) unlockStop];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_avf_video_src_create (GstPushSrc * pushsrc, GstBuffer ** buf)
|
|
{
|
|
GstFlowReturn ret;
|
|
|
|
OBJC_CALLOUT_BEGIN ();
|
|
ret = [GST_AVF_VIDEO_SRC_IMPL (pushsrc) create: buf];
|
|
OBJC_CALLOUT_END ();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_avf_video_src_negotiate (GstBaseSrc * basesrc)
|
|
{
|
|
/* FIXME: We don't support reconfiguration yet */
|
|
if (gst_pad_has_current_caps (GST_BASE_SRC_PAD (basesrc)))
|
|
return TRUE;
|
|
|
|
return GST_BASE_SRC_CLASS (parent_class)->negotiate (basesrc);
|
|
}
|
|
|