04dbb34d51
This CL adds support in RTCEAGLVideoView for rendering CVPixelBuffers as OpenGL ES textures directly, compared to the current code that first converts the CVPixelBuffers to I420, and then reuploads them as textures. This is only supported on iOS with the use of a CVOpenGLESTextureCache. The I420 rendering and native rendering are separated in two different implementations of a simple shader interface: @protocol Shader - (BOOL)drawFrame:(RTCVideoFrame*)frame; @end GL resources are allocated when the shader is instantiated and released when the shader is destroyed. RTCEAGLVideoView will lazily instantiate the necessary shader when it receives the first frame of that kind. This is primarily done to avoid allocating GL resources for both I420 and native rendering. Some other changes are: - Print GL shader compilation errors. - Remove updateTextureSizesForFrame() function. The textures will resize automatically anyway when the texture data is uploaded with glTexImage2D(). patch from issue 2154243002 at patchset 140001 (http://crrev.com/2154243002#ps140001) Continuing magjed@'s work since he is OOO this week. BUG= Review-Url: https://codereview.webrtc.org/2202823004 Cr-Commit-Position: refs/heads/master@{#13668}
44 lines
1.2 KiB
Objective-C
44 lines
1.2 KiB
Objective-C
/*
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* Copyright 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#import "RTCOpenGLDefines.h"
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@class RTCVideoFrame;
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@protocol RTCShader <NSObject>
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- (BOOL)drawFrame:(RTCVideoFrame *)frame;
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@end
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// Shader for non-native I420 frames.
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@interface RTCI420Shader : NSObject <RTCShader>
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- (instancetype)init NS_UNAVAILABLE;
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- (instancetype)initWithContext:(GlContextType *)context NS_DESIGNATED_INITIALIZER;
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- (BOOL)drawFrame:(RTCVideoFrame *)frame;
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@end
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// Native CVPixelBufferRef rendering is only supported on iPhone because it
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// depends on CVOpenGLESTextureCacheCreate.
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#if TARGET_OS_IPHONE
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// Shader for native NV12 frames.
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@interface RTCNativeNV12Shader : NSObject <RTCShader>
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- (instancetype)init NS_UNAVAILABLE;
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- (instancetype)initWithContext:(GlContextType *)context NS_DESIGNATED_INITIALIZER;
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- (BOOL)drawFrame:(RTCVideoFrame *)frame;
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@end
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#endif // TARGET_OS_IPHONE
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