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gstreamer/sys/applemedia/avfvideosrc.m
Alessandro Decina bf86d7fef1 applemedia: avfvideosrc: output at highest fps/resolution by default 
Fixate to the highest possible resolution and fps. Otherwise by default we end
up fixating at 2fps and the lowest supported resolution, which is hardly what
someone who bought an overpriced smartphone wants.
2015-12-29 10:57:36 +11:00

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/*
* Copyright (C) 2010 Ole André Vadla Ravnås <oleavr@soundrop.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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "avfvideosrc.h"
#import <AVFoundation/AVFoundation.h>
#if !HAVE_IOS
#import <AppKit/AppKit.h>
#endif
#include <gst/video/video.h>
#include <gst/gl/gstglcontext.h>
#include "coremediabuffer.h"
#include "videotexturecache.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
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (
#if !HAVE_IOS
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
"UYVY") ", "
"texture-target = " GST_GL_TEXTURE_TARGET_RECTANGLE_STR ";"
#else
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
"BGRA") ", "
"texture-target = " GST_GL_TEXTURE_TARGET_2D_STR "; "
#endif
"video/x-raw, "
"format = (string) { NV12, UYVY, YUY2 }, "
"framerate = " GST_VIDEO_FPS_RANGE ", "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE "; "
"video/x-raw, "
"format = (string) BGRA, "
"framerate = " GST_VIDEO_FPS_RANGE ", "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE "; "
));
typedef enum _QueueState {
NO_BUFFERS = 1,
HAS_BUFFER_OR_STOP_REQUEST,
} QueueState;
#define gst_avf_video_src_parent_class parent_class
G_DEFINE_TYPE (GstAVFVideoSrc, gst_avf_video_src, GST_TYPE_PUSH_SRC);
@interface GstAVFVideoSrcImpl : NSObject <AVCaptureVideoDataOutputSampleBufferDelegate> {
GstElement *element;
GstBaseSrc *baseSrc;
GstPushSrc *pushSrc;
gint deviceIndex;
BOOL doStats;
AVCaptureSession *session;
AVCaptureInput *input;
AVCaptureVideoDataOutput *output;
AVCaptureDevice *device;
AVCaptureConnection *connection;
CMClockRef inputClock;
dispatch_queue_t mainQueue;
dispatch_queue_t workerQueue;
NSConditionLock *bufQueueLock;
NSMutableArray *bufQueue;
BOOL stopRequest;
GstCaps *caps;
GstVideoFormat format;
gint width, height;
GstClockTime latency;
guint64 offset;
GstClockTime lastSampling;
guint count;
gint fps;
BOOL captureScreen;
BOOL captureScreenCursor;
BOOL captureScreenMouseClicks;
BOOL useVideoMeta;
GstVideoTextureCache *textureCache;
}
- (id)init;
- (id)initWithSrc:(GstPushSrc *)src;
- (void)finalize;
@property int deviceIndex;
@property BOOL doStats;
@property int fps;
@property BOOL captureScreen;
@property BOOL captureScreenCursor;
@property BOOL captureScreenMouseClicks;
- (BOOL)openScreenInput;
- (BOOL)openDeviceInput;
- (BOOL)openDevice;
- (void)closeDevice;
- (GstVideoFormat)getGstVideoFormat:(NSNumber *)pixel_format;
#if !HAVE_IOS
- (CGDirectDisplayID)getDisplayIdFromDeviceIndex;
#endif
- (GstCaps *)getDeviceCaps;
- (BOOL)setDeviceCaps:(GstVideoInfo *)info;
- (BOOL)getSessionPresetCaps:(GstCaps *)result;
- (BOOL)setSessionPresetCaps:(GstVideoInfo *)info;
- (GstCaps *)getCaps;
- (BOOL)setCaps:(GstCaps *)new_caps;
- (BOOL)start;
- (BOOL)stop;
- (BOOL)unlock;
- (BOOL)unlockStop;
- (BOOL)query:(GstQuery *)query;
- (GstStateChangeReturn)changeState:(GstStateChange)transition;
- (GstFlowReturn)create:(GstBuffer **)buf;
- (GstCaps *)fixate:(GstCaps *)caps;
- (void)updateStatistics;
- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
fromConnection:(AVCaptureConnection *)connection;
@end
@implementation GstAVFVideoSrcImpl
@synthesize deviceIndex, doStats, fps, captureScreen,
captureScreenCursor, captureScreenMouseClicks;
- (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;
captureScreen = NO;
captureScreenCursor = NO;
captureScreenMouseClicks = NO;
useVideoMeta = NO;
textureCache = NULL;
mainQueue =
dispatch_queue_create ("org.freedesktop.gstreamer.avfvideosrc.main", NULL);
workerQueue =
dispatch_queue_create ("org.freedesktop.gstreamer.avfvideosrc.output", NULL);
gst_base_src_set_live (baseSrc, TRUE);
gst_base_src_set_format (baseSrc, GST_FORMAT_TIME);
}
return self;
}
- (void)finalize
{
dispatch_release (mainQueue);
mainQueue = NULL;
dispatch_release (workerQueue);
workerQueue = NULL;
[super finalize];
}
- (BOOL)openDeviceInput
{
NSString *mediaType = AVMediaTypeVideo;
NSError *err;
if (deviceIndex == DEFAULT_DEVICE_INDEX) {
device = [AVCaptureDevice defaultDeviceWithMediaType:mediaType];
if (device == nil) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("No video capture devices found"), (NULL));
return NO;
}
} else {
NSArray *devices = [AVCaptureDevice devicesWithMediaType:mediaType];
if (deviceIndex >= [devices count]) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("Invalid video capture device index"), (NULL));
return NO;
}
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 NO;
}
[input retain];
return YES;
}
- (BOOL)openScreenInput
{
#if HAVE_IOS
return NO;
#else
CGDirectDisplayID displayId;
GST_DEBUG_OBJECT (element, "Opening screen input");
displayId = [self getDisplayIdFromDeviceIndex];
if (displayId == 0)
return NO;
AVCaptureScreenInput *screenInput =
[[AVCaptureScreenInput alloc] initWithDisplayID:displayId];
@try {
[screenInput setValue:[NSNumber numberWithBool:captureScreenCursor]
forKey:@"capturesCursor"];
} @catch (NSException *exception) {
if (![[exception name] isEqualToString:NSUndefinedKeyException]) {
GST_WARNING ("An unexpected error occured: %s",
[[exception reason] UTF8String]);
}
GST_WARNING ("Capturing cursor is only supported in OS X >= 10.8");
}
screenInput.capturesMouseClicks = captureScreenMouseClicks;
input = screenInput;
[input retain];
return YES;
#endif
}
- (BOOL)openDevice
{
BOOL success = NO, *successPtr = &success;
GST_DEBUG_OBJECT (element, "Opening device");
dispatch_sync (mainQueue, ^{
BOOL ret;
if (captureScreen)
ret = [self openScreenInput];
else
ret = [self openDeviceInput];
if (!ret)
return;
output = [[AVCaptureVideoDataOutput alloc] init];
[output setSampleBufferDelegate:self
queue:workerQueue];
output.alwaysDiscardsLateVideoFrames = YES;
output.videoSettings = nil; /* device native format */
session = [[AVCaptureSession alloc] init];
[session addInput:input];
[session addOutput:output];
/* retained by session */
connection = [[output connections] firstObject];
inputClock = ((AVCaptureInputPort *)connection.inputPorts[0]).clock;
*successPtr = YES;
});
GST_DEBUG_OBJECT (element, "Opening device %s", success ? "succeed" : "failed");
return success;
}
- (void)closeDevice
{
GST_DEBUG_OBJECT (element, "Closing device");
dispatch_sync (mainQueue, ^{
g_assert (![session isRunning]);
connection = nil;
inputClock = nil;
[session removeInput:input];
[session removeOutput:output];
[session release];
session = nil;
[input release];
input = nil;
[output release];
output = nil;
if (!captureScreen) {
[device release];
device = nil;
}
if (caps)
gst_caps_unref (caps);
caps = NULL;
});
}
#define GST_AVF_CAPS_NEW(format, w, h, fps_n, fps_d) \
(gst_caps_new_simple ("video/x-raw", \
"width", G_TYPE_INT, w, \
"height", G_TYPE_INT, h, \
"format", G_TYPE_STRING, gst_video_format_to_string (format), \
"framerate", GST_TYPE_FRACTION, (fps_n), (fps_d), \
NULL))
#define GST_AVF_FPS_RANGE_CAPS_NEW(format, w, h, min_fps_n, min_fps_d, max_fps_n, max_fps_d) \
(gst_caps_new_simple ("video/x-raw", \
"width", G_TYPE_INT, w, \
"height", G_TYPE_INT, h, \
"format", G_TYPE_STRING, gst_video_format_to_string (format), \
"framerate", GST_TYPE_FRACTION_RANGE, (min_fps_n), (min_fps_d), (max_fps_n), (max_fps_d), \
NULL))
- (GstVideoFormat)getGstVideoFormat:(NSNumber *)pixel_format
{
GstVideoFormat gst_format = GST_VIDEO_FORMAT_UNKNOWN;
switch ([pixel_format integerValue]) {
case kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange: /* 420v */
gst_format = GST_VIDEO_FORMAT_NV12;
break;
case kCVPixelFormatType_422YpCbCr8: /* 2vuy */
gst_format = GST_VIDEO_FORMAT_UYVY;
break;
case kCVPixelFormatType_32BGRA: /* BGRA */
gst_format = GST_VIDEO_FORMAT_BGRA;
break;
case kCVPixelFormatType_422YpCbCr8_yuvs: /* yuvs */
gst_format = GST_VIDEO_FORMAT_YUY2;
break;
default:
GST_LOG_OBJECT (element, "Pixel format %s is not handled by avfvideosrc",
[[pixel_format stringValue] UTF8String]);
break;
}
return gst_format;
}
#if !HAVE_IOS
- (CGDirectDisplayID)getDisplayIdFromDeviceIndex
{
NSDictionary *description;
NSNumber *displayId;
NSArray *screens = [NSScreen screens];
if (deviceIndex == DEFAULT_DEVICE_INDEX)
return kCGDirectMainDisplay;
if (deviceIndex >= [screens count]) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("Invalid screen capture device index"), (NULL));
return 0;
}
description = [[screens objectAtIndex:deviceIndex] deviceDescription];
displayId = [description objectForKey:@"NSScreenNumber"];
return [displayId unsignedIntegerValue];
}
#endif
- (GstCaps *)getDeviceCaps
{
NSArray *formats = [device valueForKey:@"formats"];
NSArray *pixel_formats = output.availableVideoCVPixelFormatTypes;
GstCaps *result_caps, *result_gl_caps;
#if !HAVE_IOS
GstVideoFormat gl_format = GST_VIDEO_FORMAT_UYVY;
#else
GstVideoFormat gl_format = GST_VIDEO_FORMAT_BGRA;
#endif
GST_DEBUG_OBJECT (element, "Getting device caps");
result_caps = gst_caps_new_empty ();
result_gl_caps = gst_caps_new_empty ();
/* Do not use AVCaptureDeviceFormat or AVFrameRateRange only
* available in iOS >= 7.0. We use a dynamic approach with key-value
* coding or performSelector */
for (NSObject *f in [formats reverseObjectEnumerator]) {
CMFormatDescriptionRef formatDescription;
CMVideoDimensions dimensions;
/* formatDescription can't be retrieved with valueForKey so use a selector here */
formatDescription = (CMFormatDescriptionRef) [f performSelector:@selector(formatDescription)];
dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
for (NSObject *rate in [f valueForKey:@"videoSupportedFrameRateRanges"]) {
int min_fps_n, min_fps_d, max_fps_n, max_fps_d;
gdouble min_fps, max_fps;
[[rate valueForKey:@"minFrameRate"] getValue:&min_fps];
gst_util_double_to_fraction (min_fps, &min_fps_n, &min_fps_d);
[[rate valueForKey:@"maxFrameRate"] getValue:&max_fps];
gst_util_double_to_fraction (max_fps, &max_fps_n, &max_fps_d);
for (NSNumber *pixel_format in pixel_formats) {
GstVideoFormat gst_format = [self getGstVideoFormat:pixel_format];
if (gst_format != GST_VIDEO_FORMAT_UNKNOWN) {
if (min_fps != max_fps)
gst_caps_append (result_caps, GST_AVF_FPS_RANGE_CAPS_NEW (gst_format, dimensions.width, dimensions.height, min_fps_n, min_fps_d, max_fps_n, max_fps_d));
else
gst_caps_append (result_caps, GST_AVF_CAPS_NEW (gst_format, dimensions.width, dimensions.height, max_fps_n, max_fps_d));
}
if (gst_format == gl_format) {
GstCaps *gl_caps;
if (min_fps != max_fps) {
gl_caps = GST_AVF_FPS_RANGE_CAPS_NEW (gl_format,
dimensions.width, dimensions.height,
min_fps_n, min_fps_d,
max_fps_n, max_fps_d);
} else {
gl_caps = GST_AVF_CAPS_NEW (gl_format,
dimensions.width, dimensions.height,
max_fps_n, max_fps_d);
}
gst_caps_set_features (gl_caps, 0,
gst_caps_features_new (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
NULL));
gst_caps_set_simple (gl_caps,
"texture-target", G_TYPE_STRING,
#if !HAVE_IOS
GST_GL_TEXTURE_TARGET_RECTANGLE_STR,
#else
GST_GL_TEXTURE_TARGET_2D_STR,
#endif
NULL);
gst_caps_append (result_gl_caps, gl_caps);
}
}
}
}
result_gl_caps = gst_caps_simplify (gst_caps_merge (result_gl_caps, result_caps));
GST_INFO_OBJECT (element, "Device returned the following caps %" GST_PTR_FORMAT, result_gl_caps);
return result_gl_caps;
}
- (BOOL)setDeviceCaps:(GstVideoInfo *)info
{
double framerate;
gboolean found_format = FALSE, found_framerate = FALSE;
NSArray *formats = [device valueForKey:@"formats"];
gst_util_fraction_to_double (info->fps_n, info->fps_d, &framerate);
GST_DEBUG_OBJECT (element, "Setting device caps");
if ([device lockForConfiguration:NULL] == YES) {
for (NSObject *f in formats) {
CMFormatDescriptionRef formatDescription;
CMVideoDimensions dimensions;
formatDescription = (CMFormatDescriptionRef) [f performSelector:@selector(formatDescription)];
dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
if (dimensions.width == info->width && dimensions.height == info->height) {
found_format = TRUE;
[device setValue:f forKey:@"activeFormat"];
for (NSObject *rate in [f valueForKey:@"videoSupportedFrameRateRanges"]) {
gdouble min_frame_rate, max_frame_rate;
[[rate valueForKey:@"minFrameRate"] getValue:&min_frame_rate];
[[rate valueForKey:@"maxFrameRate"] getValue:&max_frame_rate];
if ((framerate >= min_frame_rate - 0.00001) &&
(framerate <= max_frame_rate + 0.00001)) {
NSValue *min_frame_duration, *max_frame_duration;
found_framerate = TRUE;
min_frame_duration = [rate valueForKey:@"minFrameDuration"];
max_frame_duration = [rate valueForKey:@"maxFrameDuration"];
[device setValue:min_frame_duration forKey:@"activeVideoMinFrameDuration"];
@try {
/* Only available on OSX >= 10.8 and iOS >= 7.0 */
// Restrict activeVideoMaxFrameDuration to the minimum value so we get a better capture frame rate
[device setValue:min_frame_duration forKey:@"activeVideoMaxFrameDuration"];
} @catch (NSException *exception) {
if (![[exception name] isEqualToString:NSUndefinedKeyException]) {
GST_WARNING ("An unexcepted error occured: %s",
[exception.reason UTF8String]);
}
}
break;
}
}
}
}
if (!found_format) {
GST_WARNING ("Unsupported capture dimensions %dx%d", info->width, info->height);
return NO;
}
if (!found_framerate) {
GST_WARNING ("Unsupported capture framerate %d/%d", info->fps_n, info->fps_d);
return NO;
}
} else {
GST_WARNING ("Couldn't lock device for configuration");
return NO;
}
return YES;
}
- (BOOL)getSessionPresetCaps:(GstCaps *)result
{
NSArray *pixel_formats = output.availableVideoCVPixelFormatTypes;
for (NSNumber *pixel_format in pixel_formats) {
GstVideoFormat gst_format = [self getGstVideoFormat:pixel_format];
if (gst_format == GST_VIDEO_FORMAT_UNKNOWN)
continue;
#if HAVE_IOS
if ([session canSetSessionPreset:AVCaptureSessionPreset1920x1080])
gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 1920, 1080, DEVICE_FPS_N, DEVICE_FPS_D));
#endif
if ([session canSetSessionPreset:AVCaptureSessionPreset1280x720])
gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 1280, 720, DEVICE_FPS_N, DEVICE_FPS_D));
if ([session canSetSessionPreset:AVCaptureSessionPreset640x480])
gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 640, 480, DEVICE_FPS_N, DEVICE_FPS_D));
if ([session canSetSessionPreset:AVCaptureSessionPresetMedium])
gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 480, 360, DEVICE_FPS_N, DEVICE_FPS_D));
if ([session canSetSessionPreset:AVCaptureSessionPreset352x288])
gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 352, 288, DEVICE_FPS_N, DEVICE_FPS_D));
if ([session canSetSessionPreset:AVCaptureSessionPresetLow])
gst_caps_append (result, GST_AVF_CAPS_NEW (gst_format, 192, 144, DEVICE_FPS_N, DEVICE_FPS_D));
}
GST_LOG_OBJECT (element, "Session presets returned the following caps %" GST_PTR_FORMAT, result);
return YES;
}
- (BOOL)setSessionPresetCaps:(GstVideoInfo *)info;
{
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 ([self getDisplayIdFromDeviceIndex]);
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 {
result = gst_caps_merge (result, [self getDeviceCaps]);
} @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_BGRA:
newformat = kCVPixelFormatType_32BGRA;
break;
default:
*successPtr = NO;
GST_WARNING ("Unsupported output format %s",
gst_video_format_to_string (format));
return;
}
GST_INFO_OBJECT (element,
"width: %d height: %d format: %s", width, height,
gst_video_format_to_string (format));
output.videoSettings = [NSDictionary
dictionaryWithObject:[NSNumber numberWithInt:newformat]
forKey:(NSString*)kCVPixelBufferPixelFormatTypeKey];
if (caps)
gst_caps_unref (caps);
caps = gst_caps_copy (new_caps);
if (textureCache)
gst_video_texture_cache_free (textureCache);
textureCache = NULL;
GstCapsFeatures *features = gst_caps_get_features (caps, 0);
if (gst_caps_features_contains (features, GST_CAPS_FEATURE_MEMORY_GL_MEMORY)) {
GstGLContext *context = query_gl_context (GST_BASE_SRC_PAD (baseSrc));
textureCache = gst_video_texture_cache_new (context);
gst_video_texture_cache_set_format (textureCache, format, caps);
gst_object_unref (context);
}
GST_INFO_OBJECT (element, "configured caps %"GST_PTR_FORMAT
", pushing textures %d", caps, textureCache != NULL);
[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;
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;
if (textureCache)
gst_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 && caps != NULL) {
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)unlock
{
[bufQueueLock lock];
stopRequest = YES;
[bufQueueLock unlockWithCondition:HAS_BUFFER_OR_STOP_REQUEST];
return YES;
}
- (BOOL)unlockStop
{
[bufQueueLock lock];
stopRequest = NO;
[bufQueueLock unlockWithCondition:([bufQueue count] == 0) ? NO_BUFFERS : HAS_BUFFER_OR_STOP_REQUEST];
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 *)aConnection
{
GstClockTime timestamp, duration;
[bufQueueLock lock];
if (stopRequest) {
[bufQueueLock unlock];
return;
}
[self getSampleBuffer:sampleBuffer timestamp:&timestamp duration:&duration];
if (timestamp == GST_CLOCK_TIME_NONE) {
[bufQueueLock unlockWithCondition:([bufQueue count] == 0) ? NO_BUFFERS : HAS_BUFFER_OR_STOP_REQUEST];
return;
}
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 (*buf == NULL) {
CFRelease (sbuf);
return GST_FLOW_ERROR;
}
CFRelease (sbuf);
if (textureCache != NULL) {
*buf = gst_video_texture_cache_get_gl_buffer (textureCache, *buf);
if (*buf == NULL)
return GST_FLOW_ERROR;
}
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;
}
static GstGLContext *
query_gl_context (GstPad *srcpad)
{
GstGLContext *gl_context = NULL;
GstContext *context = NULL;
GstQuery *query;
query = gst_query_new_context ("gst.gl.local_context");
if (gst_pad_peer_query (srcpad, query)) {
gst_query_parse_context (query, &context);
if (context) {
const GstStructure *s = gst_context_get_structure (context);
gst_structure_get (s, "context", GST_GL_TYPE_CONTEXT, &gl_context, NULL);
}
}
gst_query_unref (query);
return gl_context;
}
static gboolean
caps_filter_out_gl_memory (GstCapsFeatures * features, GstStructure * structure,
gpointer user_data)
{
return !gst_caps_features_contains (features,
GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
}
- (GstCaps *)fixate:(GstCaps *)new_caps
{
GstGLContext *context;
GstStructure *structure;
new_caps = gst_caps_make_writable (new_caps);
context = query_gl_context (GST_BASE_SRC_PAD (baseSrc));
if (!context)
gst_caps_filter_and_map_in_place (new_caps, caps_filter_out_gl_memory, NULL);
else
gst_object_unref (context);
new_caps = gst_caps_truncate (new_caps);
structure = gst_caps_get_structure (new_caps, 0);
/* crank up to 11. This is what the presets do, but we don't use the presets
* in ios >= 7.0 */
gst_structure_fixate_field_nearest_int (structure, "height", G_MAXINT);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", G_MAXINT, 1);
return gst_caps_fixate (new_caps);
}
- (void)getSampleBuffer:(CMSampleBufferRef)sbuf
timestamp:(GstClockTime *)outTimestamp
duration:(GstClockTime *)outDuration
{
CMSampleTimingInfo time_info;
GstClockTime timestamp, avf_timestamp, duration, input_clock_now, input_clock_diff, 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) {
avf_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);
input_clock_now = gst_util_uint64_scale (GST_SECOND,
now.value, now.timescale);
input_clock_diff = input_clock_now - avf_timestamp;
GST_OBJECT_LOCK (element);
clock = GST_ELEMENT_CLOCK (element);
if (clock) {
running_time = gst_clock_get_time (clock) - element->base_time;
/* We use presentationTimeStamp to determine how much time it took
* between capturing and receiving the frame in our delegate
* (e.g. how long it spent in AVF queues), then we subtract that time
* from our running time to get the actual timestamp.
*/
if (running_time >= input_clock_diff)
timestamp = running_time - input_clock_diff;
else
timestamp = running_time;
GST_DEBUG_OBJECT (element, "AVF clock: %"GST_TIME_FORMAT ", AVF PTS: %"GST_TIME_FORMAT
", AVF clock diff: %"GST_TIME_FORMAT
", running time: %"GST_TIME_FORMAT ", out PTS: %"GST_TIME_FORMAT,
GST_TIME_ARGS (input_clock_now), GST_TIME_ARGS (avf_timestamp),
GST_TIME_ARGS (input_clock_diff),
GST_TIME_ARGS (running_time), GST_TIME_ARGS (timestamp));
} else {
/* no clock, can't set timestamps */
timestamp = GST_CLOCK_TIME_NONE;
}
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_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 GstCaps * gst_avf_video_src_fixate (GstBaseSrc * bsrc,
GstCaps * caps);
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->fixate = gst_avf_video_src_fixate;
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_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);
}
static GstCaps *
gst_avf_video_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstCaps *ret;
OBJC_CALLOUT_BEGIN ();
ret = [GST_AVF_VIDEO_SRC_IMPL (bsrc) fixate:caps];
OBJC_CALLOUT_END ();
return ret;
}
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