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gstreamer/sys/applemedia/avfvideosrc.m
Tim-Philipp Müller 9e1b75fda3 Fix FSF address 
https://bugzilla.gnome.org/show_bug.cgi?id=687520
2012-11-04 00:09:59 +00:00

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/*
* Copyright (C) 2010 Ole André Vadla Ravnås <oravnas@cisco.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "avfvideosrc.h"
#import "bufferfactory.h"
#import <AVFoundation/AVFoundation.h>
#include <gst/video/video.h>
#define DEFAULT_DEVICE_INDEX -1
#define DEFAULT_DO_STATS FALSE
#define DEVICE_FPS_N 25
#define DEVICE_FPS_D 1
#define BUFFER_QUEUE_SIZE 2
GST_DEBUG_CATEGORY (gst_avf_video_src_debug);
#define GST_CAT_DEFAULT gst_avf_video_src_debug
#define VIDEO_CAPS_YUV(width, height) "video/x-raw-yuv, " \
"format = (fourcc) { NV12, UYVY, YUY2 }, " \
"framerate = " GST_VIDEO_FPS_RANGE ", " \
"width = (int) " G_STRINGIFY (width) ", height = (int) " G_STRINGIFY (height)
#define VIDEO_CAPS_BGRA(width, height) "video/x-raw-rgb, " \
"bpp = (int) 32, " \
"depth = (int) 32, " \
"endianness = (int) BIG_ENDIAN, " \
"red_mask = (int) " GST_VIDEO_BYTE3_MASK_32 ", " \
"green_mask = (int) " GST_VIDEO_BYTE2_MASK_32 ", " \
"blue_mask = (int) " GST_VIDEO_BYTE1_MASK_32 ", " \
"alpha_mask = (int) " GST_VIDEO_BYTE4_MASK_32 ", " \
"width = (int) " G_STRINGIFY (width) ", height = (int) " G_STRINGIFY (height)
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (VIDEO_CAPS_YUV (192, 144) ";"
VIDEO_CAPS_YUV (480, 360) ";"
VIDEO_CAPS_YUV (352, 288) ";"
VIDEO_CAPS_YUV (640, 480) ";"
VIDEO_CAPS_YUV (1280, 720) ";"
VIDEO_CAPS_YUV (1920, 1280) ";"
VIDEO_CAPS_BGRA (192, 144) ";"
VIDEO_CAPS_BGRA (480, 360) ";"
VIDEO_CAPS_BGRA (352, 288) ";"
VIDEO_CAPS_BGRA (640, 480) ";"
VIDEO_CAPS_BGRA (1280, 720) ";"
VIDEO_CAPS_BGRA (1920, 1280))
);
typedef enum _QueueState {
NO_BUFFERS = 1,
HAS_BUFFER_OR_STOP_REQUEST,
} QueueState;
static GstPushSrcClass * parent_class;
@interface GstAVFVideoSrcImpl : NSObject <AVCaptureVideoDataOutputSampleBufferDelegate> {
GstElement *element;
GstBaseSrc *baseSrc;
GstPushSrc *pushSrc;
gint deviceIndex;
BOOL doStats;
GstAMBufferFactory *bufferFactory;
AVCaptureSession *session;
AVCaptureDeviceInput *input;
AVCaptureVideoDataOutput *output;
AVCaptureDevice *device;
dispatch_queue_t mainQueue;
dispatch_queue_t workerQueue;
NSConditionLock *bufQueueLock;
NSMutableArray *bufQueue;
BOOL stopRequest;
GstVideoFormat format;
gint width, height;
GstClockTime duration;
guint64 offset;
GstClockTime lastSampling;
guint count;
gint fps;
}
- (id)init;
- (id)initWithSrc:(GstPushSrc *)src;
- (void)finalize;
@property int deviceIndex;
@property BOOL doStats;
@property int fps;
- (BOOL)openDevice;
- (void)closeDevice;
- (GstCaps *)getCaps;
- (BOOL)setCaps:(GstCaps *)caps;
- (BOOL)start;
- (BOOL)stop;
- (BOOL)unlock;
- (BOOL)unlockStop;
- (BOOL)query:(GstQuery *)query;
- (GstStateChangeReturn)changeState:(GstStateChange)transition;
- (GstFlowReturn)create:(GstBuffer **)buf;
- (void)timestampBuffer:(GstBuffer *)buf;
- (void)updateStatistics;
- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
fromConnection:(AVCaptureConnection *)connection;
- (void)waitForMainQueueToDrain;
- (void)waitForWorkerQueueToDrain;
- (void)waitForQueueToDrain:(dispatch_queue_t)dispatchQueue;
@end
@implementation GstAVFVideoSrcImpl
- (id)init
{
return [self initWithSrc:NULL];
}
- (id)initWithSrc:(GstPushSrc *)src
{
if ((self = [super init])) {
element = GST_ELEMENT_CAST (src);
baseSrc = GST_BASE_SRC_CAST (src);
pushSrc = src;
deviceIndex = DEFAULT_DEVICE_INDEX;
mainQueue = dispatch_get_main_queue ();
workerQueue =
dispatch_queue_create ("org.freedesktop.gstreamer.avfvideosrc", NULL);
gst_base_src_set_live (baseSrc, TRUE);
gst_base_src_set_format (baseSrc, GST_FORMAT_TIME);
}
return self;
}
- (void)finalize
{
mainQueue = NULL;
dispatch_release (workerQueue);
workerQueue = NULL;
[super finalize];
}
@synthesize deviceIndex, doStats, fps;
- (BOOL)openDevice
{
BOOL success = NO, *successPtr = &success;
GError *error;
bufferFactory = [[GstAMBufferFactory alloc] initWithError:&error];
if (bufferFactory == nil) {
GST_ELEMENT_ERROR (element, RESOURCE, FAILED, ("API error"),
("%s", error->message));
g_clear_error (&error);
return NO;
}
dispatch_async (mainQueue, ^{
NSString *mediaType = AVMediaTypeVideo;
NSError *err;
if (deviceIndex == -1) {
device = [AVCaptureDevice defaultDeviceWithMediaType:mediaType];
if (device == nil) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("No video capture devices found"), (NULL));
return;
}
} else {
NSArray *devices = [AVCaptureDevice devicesWithMediaType:mediaType];
if (deviceIndex >= [devices count]) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("Invalid video capture device index"), (NULL));
return;
}
device = [devices objectAtIndex:deviceIndex];
}
g_assert (device != nil);
[device retain];
GST_INFO ("Opening '%s'", [[device localizedName] UTF8String]);
input = [AVCaptureDeviceInput deviceInputWithDevice:device
error:&err];
if (input == nil) {
GST_ELEMENT_ERROR (element, RESOURCE, BUSY,
("Failed to open device: %s",
[[err localizedDescription] UTF8String]),
(NULL));
[device release];
device = nil;
return;
}
[input retain];
output = [[AVCaptureVideoDataOutput alloc] init];
[output setSampleBufferDelegate:self
queue:workerQueue];
output.alwaysDiscardsLateVideoFrames = YES;
output.minFrameDuration = kCMTimeZero; /* unlimited */
output.videoSettings = nil; /* device native format */
session = [[AVCaptureSession alloc] init];
[session addInput:input];
[session addOutput:output];
*successPtr = YES;
});
[self waitForMainQueueToDrain];
if (!success) {
[bufferFactory release];
bufferFactory = nil;
}
return success;
}
- (void)closeDevice
{
dispatch_async (mainQueue, ^{
g_assert (![session isRunning]);
[session removeInput:input];
[session removeOutput:output];
[session release];
session = nil;
[input release];
input = nil;
[output release];
output = nil;
[device release];
device = nil;
});
[self waitForMainQueueToDrain];
[bufferFactory release];
bufferFactory = nil;
}
#define GST_AVF_CAPS_NEW(format, w, h) \
(gst_video_format_new_caps (format, w, h, \
DEVICE_FPS_N, DEVICE_FPS_D, 1, 1))
- (GstCaps *)getCaps
{
GstCaps *result;
NSArray *formats;
if (session == nil)
return NULL; /* BaseSrc will return template caps */
result = gst_caps_new_empty ();
formats = output.availableVideoCVPixelFormatTypes;
for (id object in formats) {
NSNumber *nsformat = object;
GstVideoFormat gstformat = GST_VIDEO_FORMAT_UNKNOWN;
switch ([nsformat integerValue]) {
case kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange: /* 420v */
gstformat = GST_VIDEO_FORMAT_NV12;
break;
case kCVPixelFormatType_422YpCbCr8: /* 2vuy */
gstformat = GST_VIDEO_FORMAT_UYVY;
break;
case kCVPixelFormatType_32BGRA: /* BGRA */
gstformat = GST_VIDEO_FORMAT_BGRA;
break;
case kCVPixelFormatType_422YpCbCr8_yuvs: /* yuvs */
gstformat = GST_VIDEO_FORMAT_YUY2;
break;
default:
continue;
}
gst_caps_append (result, GST_AVF_CAPS_NEW (gstformat, 192, 144));
if ([session canSetSessionPreset:AVCaptureSessionPreset352x288])
gst_caps_append (result, GST_AVF_CAPS_NEW (gstformat, 352, 288));
if ([session canSetSessionPreset:AVCaptureSessionPresetMedium])
gst_caps_append (result, GST_AVF_CAPS_NEW (gstformat, 480, 360));
if ([session canSetSessionPreset:AVCaptureSessionPreset640x480])
gst_caps_append (result, GST_AVF_CAPS_NEW (gstformat, 640, 480));
if ([session canSetSessionPreset:AVCaptureSessionPreset1280x720])
gst_caps_append (result, GST_AVF_CAPS_NEW (gstformat, 1280, 720));
if ([session canSetSessionPreset:AVCaptureSessionPreset1920x1080])
gst_caps_append (result, GST_AVF_CAPS_NEW (gstformat, 1920, 1080));
}
return result;
}
- (BOOL)setCaps:(GstCaps *)caps
{
gst_video_format_parse_caps (caps, &format, &width, &height);
dispatch_async (mainQueue, ^{
int newformat;
g_assert (![session isRunning]);
switch (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;
case 1920:
session.sessionPreset = AVCaptureSessionPreset1920x1080;
break;
default:
g_assert_not_reached ();
}
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_BGRA:
newformat = kCVPixelFormatType_32BGRA;
break;
default:
g_assert_not_reached ();
}
GST_DEBUG_OBJECT(element,
"Width: %d Height: %d Format: %" GST_FOURCC_FORMAT,
width, height,
GST_FOURCC_ARGS (gst_video_format_to_fourc(format)));
output.videoSettings = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:newformat] forKey:(NSString*)kCVPixelBu
[session startRunning];
});
[self waitForMainQueueToDrain];
return YES;
}
- (BOOL)start
{
bufQueueLock = [[NSConditionLock alloc] initWithCondition:NO_BUFFERS];
bufQueue = [[NSMutableArray alloc] initWithCapacity:BUFFER_QUEUE_SIZE];
stopRequest = NO;
duration = gst_util_uint64_scale (GST_SECOND, DEVICE_FPS_D, DEVICE_FPS_N);
offset = 0;
lastSampling = GST_CLOCK_TIME_NONE;
count = 0;
fps = -1;
return YES;
}
- (BOOL)stop
{
dispatch_async (mainQueue, ^{ [session stopRunning]; });
[self waitForMainQueueToDrain];
[self waitForWorkerQueueToDrain];
[bufQueueLock release];
bufQueueLock = nil;
[bufQueue release];
bufQueue = nil;
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 = duration; /* for now */
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)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
{
[bufQueueLock lock];
if (stopRequest) {
[bufQueueLock unlock];
return;
}
if ([bufQueue count] == BUFFER_QUEUE_SIZE)
[bufQueue removeLastObject];
[bufQueue insertObject:(id)sampleBuffer
atIndex:0];
[bufQueueLock unlockWithCondition:HAS_BUFFER_OR_STOP_REQUEST];
}
- (GstFlowReturn)create:(GstBuffer **)buf
{
CMSampleBufferRef sbuf;
[bufQueueLock lockWhenCondition:HAS_BUFFER_OR_STOP_REQUEST];
if (stopRequest) {
[bufQueueLock unlock];
return GST_FLOW_FLUSHING;
}
sbuf = (CMSampleBufferRef) [bufQueue lastObject];
CFRetain (sbuf);
[bufQueue removeLastObject];
[bufQueueLock unlockWithCondition:
([bufQueue count] == 0) ? NO_BUFFERS : HAS_BUFFER_OR_STOP_REQUEST];
*buf = [bufferFactory createGstBufferForSampleBuffer:sbuf];
CFRelease (sbuf);
[self timestampBuffer:*buf];
if (doStats)
[self updateStatistics];
return GST_FLOW_OK;
}
- (void)timestampBuffer:(GstBuffer *)buf
{
GstClock *clock;
GstClockTime timestamp;
GST_OBJECT_LOCK (element);
clock = GST_ELEMENT_CLOCK (element);
if (clock != NULL) {
gst_object_ref (clock);
timestamp = element->base_time;
} else {
timestamp = GST_CLOCK_TIME_NONE;
}
GST_OBJECT_UNLOCK (element);
if (clock != NULL) {
timestamp = gst_clock_get_time (clock) - timestamp;
if (timestamp > duration)
timestamp -= duration;
else
timestamp = 0;
gst_object_unref (clock);
clock = NULL;
}
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;
}
- (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;
}
}
}
- (void)waitForMainQueueToDrain
{
[self waitForQueueToDrain:mainQueue];
}
- (void)waitForWorkerQueueToDrain
{
[self waitForQueueToDrain:workerQueue];
}
- (void)waitForQueueToDrain:(dispatch_queue_t)dispatchQueue
{
dispatch_sync (dispatchQueue, ^{});
}
@end
/*
* Glue code
*/
enum
{
PROP_0,
PROP_DEVICE_INDEX,
PROP_DO_STATS,
PROP_FPS
};
GST_BOILERPLATE (GstAVFVideoSrc, gst_avf_video_src, GstPushSrc,
GST_TYPE_PUSH_SRC);
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);
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_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 void
gst_avf_video_src_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_set_metadata (element_class,
"Video Source (AVFoundation)", "Source/Video",
"Reads frames from an iOS AVFoundation device",
"Ole André Vadla Ravnås <oravnas@cisco.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
}
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;
gstpushsrc_class->create = gst_avf_video_src_create;
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));
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, GstAVFVideoSrcClass * gclass)
{
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) {
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) {
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 *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_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;
}
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