Delete talk directory, and references from build_ios_libs.sh.

talk/app/webrtc/objc/RTCEAGLVideoView.m

-/*
- * libjingle
- * Copyright 2014 Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *  1. Redistributions of source code must retain the above copyright notice,
- *     this list of conditions and the following disclaimer.
- *  2. Redistributions in binary form must reproduce the above copyright notice,
- *     this list of conditions and the following disclaimer in the documentation
- *     and/or other materials provided with the distribution.
- *  3. The name of the author may not be used to endorse or promote products
- *     derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-#import "RTCEAGLVideoView.h"
-
-#import <GLKit/GLKit.h>
-
-#import "RTCI420Frame.h"
-#import "RTCOpenGLVideoRenderer.h"
-
-// RTCDisplayLinkTimer wraps a CADisplayLink and is set to fire every two screen
-// refreshes, which should be 30fps. We wrap the display link in order to avoid
-// a retain cycle since CADisplayLink takes a strong reference onto its target.
-// The timer is paused by default.
-@interface RTCDisplayLinkTimer : NSObject
-
-@property(nonatomic) BOOL isPaused;
-
-- (instancetype)initWithTimerHandler:(void (^)(void))timerHandler;
-- (void)invalidate;
-
-@end
-
-@implementation RTCDisplayLinkTimer {
-  CADisplayLink* _displayLink;
-  void (^_timerHandler)(void);
-}
-
-- (instancetype)initWithTimerHandler:(void (^)(void))timerHandler {
-  NSParameterAssert(timerHandler);
-  if (self = [super init]) {
-    _timerHandler = timerHandler;
-    _displayLink =
-        [CADisplayLink displayLinkWithTarget:self
-                                    selector:@selector(displayLinkDidFire:)];
-    _displayLink.paused = YES;
-    // Set to half of screen refresh, which should be 30fps.
-    [_displayLink setFrameInterval:2];
-    [_displayLink addToRunLoop:[NSRunLoop currentRunLoop]
-                       forMode:NSRunLoopCommonModes];
-  }
-  return self;
-}
-
-- (void)dealloc {
-  [self invalidate];
-}
-
-- (BOOL)isPaused {
-  return _displayLink.paused;
-}
-
-- (void)setIsPaused:(BOOL)isPaused {
-  _displayLink.paused = isPaused;
-}
-
-- (void)invalidate {
-  [_displayLink invalidate];
-}
-
-- (void)displayLinkDidFire:(CADisplayLink*)displayLink {
-  _timerHandler();
-}
-
-@end
-
-// RTCEAGLVideoView wraps a GLKView which is setup with
-// enableSetNeedsDisplay = NO for the purpose of gaining control of
-// exactly when to call -[GLKView display]. This need for extra
-// control is required to avoid triggering method calls on GLKView
-// that results in attempting to bind the underlying render buffer
-// when the drawable size would be empty which would result in the
-// error GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT. -[GLKView display] is
-// the method that will trigger the binding of the render
-// buffer. Because the standard behaviour of -[UIView setNeedsDisplay]
-// is disabled for the reasons above, the RTCEAGLVideoView maintains
-// its own |isDirty| flag.
-
-@interface RTCEAGLVideoView () <GLKViewDelegate>
-// |i420Frame| is set when we receive a frame from a worker thread and is read
-// from the display link callback so atomicity is required.
-@property(atomic, strong) RTCI420Frame* i420Frame;
-@property(nonatomic, readonly) GLKView* glkView;
-@property(nonatomic, readonly) RTCOpenGLVideoRenderer* glRenderer;
-@end
-
-@implementation RTCEAGLVideoView {
-  RTCDisplayLinkTimer* _timer;
-  GLKView* _glkView;
-  RTCOpenGLVideoRenderer* _glRenderer;
-  // This flag should only be set and read on the main thread (e.g. by
-  // setNeedsDisplay)
-  BOOL _isDirty;
-}
-
-- (instancetype)initWithFrame:(CGRect)frame {
-  if (self = [super initWithFrame:frame]) {
-    [self configure];
-  }
-  return self;
-}
-
-- (instancetype)initWithCoder:(NSCoder *)aDecoder {
-  if (self = [super initWithCoder:aDecoder]) {
-    [self configure];
-  }
-  return self;
-}
-
-- (void)configure {
-  EAGLContext* glContext =
-    [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES3];
-  if (!glContext) {
-    glContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
-  }
-  _glRenderer = [[RTCOpenGLVideoRenderer alloc] initWithContext:glContext];
-
-  // GLKView manages a framebuffer for us.
-  _glkView = [[GLKView alloc] initWithFrame:CGRectZero
-                                    context:glContext];
-  _glkView.drawableColorFormat = GLKViewDrawableColorFormatRGBA8888;
-  _glkView.drawableDepthFormat = GLKViewDrawableDepthFormatNone;
-  _glkView.drawableStencilFormat = GLKViewDrawableStencilFormatNone;
-  _glkView.drawableMultisample = GLKViewDrawableMultisampleNone;
-  _glkView.delegate = self;
-  _glkView.layer.masksToBounds = YES;
-  _glkView.enableSetNeedsDisplay = NO;
-  [self addSubview:_glkView];
-
-  // Listen to application state in order to clean up OpenGL before app goes
-  // away.
-  NSNotificationCenter* notificationCenter =
-    [NSNotificationCenter defaultCenter];
-  [notificationCenter addObserver:self
-                         selector:@selector(willResignActive)
-                             name:UIApplicationWillResignActiveNotification
-                           object:nil];
-  [notificationCenter addObserver:self
-                         selector:@selector(didBecomeActive)
-                             name:UIApplicationDidBecomeActiveNotification
-                           object:nil];
-
-  // Frames are received on a separate thread, so we poll for current frame
-  // using a refresh rate proportional to screen refresh frequency. This
-  // occurs on the main thread.
-  __weak RTCEAGLVideoView* weakSelf = self;
-  _timer = [[RTCDisplayLinkTimer alloc] initWithTimerHandler:^{
-      RTCEAGLVideoView* strongSelf = weakSelf;
-      [strongSelf displayLinkTimerDidFire];
-    }];
-  [self setupGL];
-}
-
-- (void)dealloc {
-  [[NSNotificationCenter defaultCenter] removeObserver:self];
-  UIApplicationState appState =
-      [UIApplication sharedApplication].applicationState;
-  if (appState == UIApplicationStateActive) {
-    [self teardownGL];
-  }
-  [_timer invalidate];
-}
-
-#pragma mark - UIView
-
-- (void)setNeedsDisplay {
-  [super setNeedsDisplay];
-  _isDirty = YES;
-}
-
-- (void)setNeedsDisplayInRect:(CGRect)rect {
-  [super setNeedsDisplayInRect:rect];
-  _isDirty = YES;
-}
-
-- (void)layoutSubviews {
-  [super layoutSubviews];
-  _glkView.frame = self.bounds;
-}
-
-#pragma mark - GLKViewDelegate
-
-// This method is called when the GLKView's content is dirty and needs to be
-// redrawn. This occurs on main thread.
-- (void)glkView:(GLKView*)view drawInRect:(CGRect)rect {
-  // The renderer will draw the frame to the framebuffer corresponding to the
-  // one used by |view|.
-  [_glRenderer drawFrame:self.i420Frame];
-}
-
-#pragma mark - RTCVideoRenderer
-
-// These methods may be called on non-main thread.
-- (void)setSize:(CGSize)size {
-  __weak RTCEAGLVideoView* weakSelf = self;
-  dispatch_async(dispatch_get_main_queue(), ^{
-    RTCEAGLVideoView* strongSelf = weakSelf;
-    [strongSelf.delegate videoView:strongSelf didChangeVideoSize:size];
-  });
-}
-
-- (void)renderFrame:(RTCI420Frame*)frame {
-  self.i420Frame = frame;
-}
-
-#pragma mark - Private
-
-- (void)displayLinkTimerDidFire {
-  // Don't render unless video frame have changed or the view content
-  // has explicitly been marked dirty.
-  if (!_isDirty && _glRenderer.lastDrawnFrame == self.i420Frame) {
-    return;
-  }
-
-  // Always reset isDirty at this point, even if -[GLKView display]
-  // won't be called in the case the drawable size is empty.
-  _isDirty = NO;
-
-  // Only call -[GLKView display] if the drawable size is
-  // non-empty. Calling display will make the GLKView setup its
-  // render buffer if necessary, but that will fail with error
-  // GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT if size is empty.
-  if (self.bounds.size.width > 0 && self.bounds.size.height > 0) {
-    [_glkView display];
-  }
-}
-
-- (void)setupGL {
-  self.i420Frame = nil;
-  [_glRenderer setupGL];
-  _timer.isPaused = NO;
-}
-
-- (void)teardownGL {
-  self.i420Frame = nil;
-  _timer.isPaused = YES;
-  [_glkView deleteDrawable];
-  [_glRenderer teardownGL];
-}
-
-- (void)didBecomeActive {
-  [self setupGL];
-}
-
-- (void)willResignActive {
-  [self teardownGL];
-}
-
-@end