| magjed | 15f0c68 | 2017-04-27 01:26:33 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #import "RTCNV12TextureCache.h" |
| 12 | |
| 13 | #import "WebRTC/RTCVideoFrame.h" |
| 14 | |
| 15 | @implementation RTCNV12TextureCache { |
| 16 | CVOpenGLESTextureCacheRef _textureCache; |
| 17 | CVOpenGLESTextureRef _yTextureRef; |
| 18 | CVOpenGLESTextureRef _uvTextureRef; |
| 19 | } |
| 20 | |
| 21 | - (GLuint)yTexture { |
| 22 | return CVOpenGLESTextureGetName(_yTextureRef); |
| 23 | } |
| 24 | |
| 25 | - (GLuint)uvTexture { |
| 26 | return CVOpenGLESTextureGetName(_uvTextureRef); |
| 27 | } |
| 28 | |
| 29 | - (instancetype)initWithContext:(EAGLContext *)context { |
| 30 | if (self = [super init]) { |
| 31 | CVReturn ret = CVOpenGLESTextureCacheCreate( |
| 32 | kCFAllocatorDefault, NULL, |
| 33 | #if COREVIDEO_USE_EAGLCONTEXT_CLASS_IN_API |
| 34 | context, |
| 35 | #else |
| 36 | (__bridge void *)context, |
| 37 | #endif |
| 38 | NULL, &_textureCache); |
| 39 | if (ret != kCVReturnSuccess) { |
| 40 | self = nil; |
| 41 | } |
| 42 | } |
| 43 | return self; |
| 44 | } |
| 45 | |
| 46 | - (BOOL)loadTexture:(CVOpenGLESTextureRef *)textureOut |
| 47 | pixelBuffer:(CVPixelBufferRef)pixelBuffer |
| 48 | planeIndex:(int)planeIndex |
| 49 | pixelFormat:(GLenum)pixelFormat { |
| 50 | const int width = CVPixelBufferGetWidthOfPlane(pixelBuffer, planeIndex); |
| 51 | const int height = CVPixelBufferGetHeightOfPlane(pixelBuffer, planeIndex); |
| 52 | |
| 53 | if (*textureOut) { |
| 54 | CFRelease(*textureOut); |
| 55 | *textureOut = nil; |
| 56 | } |
| 57 | CVReturn ret = CVOpenGLESTextureCacheCreateTextureFromImage( |
| 58 | kCFAllocatorDefault, _textureCache, pixelBuffer, NULL, GL_TEXTURE_2D, pixelFormat, width, |
| 59 | height, pixelFormat, GL_UNSIGNED_BYTE, planeIndex, textureOut); |
| 60 | if (ret != kCVReturnSuccess) { |
| 61 | CFRelease(*textureOut); |
| 62 | *textureOut = nil; |
| 63 | return NO; |
| 64 | } |
| 65 | NSAssert(CVOpenGLESTextureGetTarget(*textureOut) == GL_TEXTURE_2D, |
| 66 | @"Unexpected GLES texture target"); |
| 67 | glBindTexture(GL_TEXTURE_2D, CVOpenGLESTextureGetName(*textureOut)); |
| 68 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
| 69 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| 70 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); |
| 71 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); |
| 72 | return YES; |
| 73 | } |
| 74 | |
| 75 | - (BOOL)uploadFrameToTextures:(RTCVideoFrame *)frame { |
| 76 | CVPixelBufferRef pixelBuffer = frame.nativeHandle; |
| 77 | NSParameterAssert(pixelBuffer); |
| 78 | return [self loadTexture:&_yTextureRef |
| 79 | pixelBuffer:pixelBuffer |
| 80 | planeIndex:0 |
| 81 | pixelFormat:GL_LUMINANCE] && |
| 82 | [self loadTexture:&_uvTextureRef |
| 83 | pixelBuffer:pixelBuffer |
| 84 | planeIndex:1 |
| 85 | pixelFormat:GL_LUMINANCE_ALPHA]; |
| 86 | } |
| 87 | |
| 88 | - (void)releaseTextures { |
| 89 | if (_uvTextureRef) { |
| 90 | CFRelease(_uvTextureRef); |
| 91 | _uvTextureRef = nil; |
| 92 | } |
| 93 | if (_yTextureRef) { |
| 94 | CFRelease(_yTextureRef); |
| 95 | _yTextureRef = nil; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | - (void)dealloc { |
| 100 | [self releaseTextures]; |
| 101 | if (_textureCache) { |
| 102 | CFRelease(_textureCache); |
| 103 | _textureCache = nil; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | @end |
| 108 | |