Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 1 | /* |
Sébastien Blin | 029ffa8 | 2019-01-02 17:43:48 -0500 | [diff] [blame] | 2 | * Copyright (C) 2017-2019 Savoir-faire Linux Inc. |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 3 | * Author: Anthony Léonard <anthony.leonard@savoirfairelinux.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 3 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | */ |
| 19 | |
| 20 | #import "CallLayer.h" |
| 21 | #import <OpenGL/gl3.h> |
| 22 | |
| 23 | static const GLchar* vShaderSrc = R"glsl( |
| 24 | #version 150 |
| 25 | |
| 26 | in vec2 in_Pos; |
| 27 | in vec2 in_TexCoord; |
| 28 | uniform vec2 in_Scaling; |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 29 | uniform mat4 in_rotationMatrix; |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 30 | |
| 31 | out vec2 texCoord; |
| 32 | |
| 33 | void main() |
| 34 | { |
| 35 | texCoord = in_TexCoord; |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 36 | gl_Position = in_rotationMatrix * vec4(in_Pos.x*in_Scaling.x, in_Pos.y*in_Scaling.y, 0.0, 1.0); |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 37 | } |
| 38 | )glsl"; |
| 39 | |
| 40 | static const GLchar* fShaderSrc = R"glsl( |
| 41 | #version 150 |
| 42 | |
| 43 | out vec4 fragColor; |
| 44 | in vec2 texCoord; |
| 45 | |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 46 | uniform sampler2D tex_y, tex_uv; |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 47 | |
| 48 | void main() |
| 49 | { |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 50 | mediump vec3 yuv, rgb; |
| 51 | yuv.x = (texture(tex_y, texCoord).r); |
| 52 | yuv.yz = (texture(tex_uv, texCoord).rg - vec2(0.5, 0.5)); |
| 53 | rgb = mat3( 1, 1, 1, |
| 54 | 0, -0.3441, 1.7720, |
| 55 | 1.4020, -0.7141, 0) * yuv; |
| 56 | fragColor = vec4(rgb, 1); |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 57 | } |
| 58 | )glsl"; |
| 59 | |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 60 | @interface CallLayer() |
| 61 | |
| 62 | @property BOOL currentFrameDisplayed; |
| 63 | @property NSLock* currentFrameLk; |
| 64 | @property CGFloat currentWidth; |
| 65 | @property CGFloat currentHeight; |
| 66 | @property CGFloat currentAngle; |
| 67 | @property CVPixelBufferRef currentFrame; |
| 68 | |
| 69 | @end |
| 70 | |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 71 | @implementation CallLayer |
| 72 | |
| 73 | // OpenGL handlers |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 74 | GLuint textureY, textureUV, textureUniformY, textureUniformUV, vbo, vShader, fShader, sProg, vao; |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 75 | |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 76 | @synthesize currentAngle, currentFrameDisplayed, currentFrameLk, currentWidth, currentHeight, currentFrame, videoRunning; |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 77 | |
| 78 | - (id) init |
| 79 | { |
| 80 | self = [super init]; |
| 81 | if (self) { |
| 82 | currentFrameLk = [[NSLock alloc] init]; |
| 83 | [self setVideoRunning:NO]; |
| 84 | } |
| 85 | return self; |
| 86 | } |
| 87 | |
| 88 | // This setter is redefined so we can initialize the OpenGL context when this one is |
| 89 | // setup by the UI (which seems to be done just before the first draw attempt and not in init method); |
| 90 | - (void)setOpenGLContext:(NSOpenGLContext *)openGLContext |
| 91 | { |
| 92 | [super setOpenGLContext:openGLContext]; |
| 93 | |
| 94 | if (openGLContext) { |
| 95 | GLfloat vertices[] = { |
| 96 | -1.0, 1.0, 0.0, 0.0, // Top-left |
| 97 | 1.0, 1.0, 1.0, 0.0, // Top-right |
| 98 | -1.0, -1.0, 0.0, 1.0, // Bottom-left |
| 99 | 1.0, -1.0, 1.0, 1.0 // Bottom-right |
| 100 | }; |
| 101 | |
| 102 | [openGLContext makeCurrentContext]; |
| 103 | |
| 104 | // VAO |
| 105 | glGenVertexArrays(1, &vao); |
| 106 | glBindVertexArray(vao); |
| 107 | |
| 108 | // VBO |
| 109 | glGenBuffers(1, &vbo); |
| 110 | glBindBuffer(GL_ARRAY_BUFFER, vbo); |
| 111 | glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); |
| 112 | |
| 113 | // Vertex shader |
| 114 | vShader = glCreateShader(GL_VERTEX_SHADER); |
| 115 | glShaderSource(vShader, 1, &vShaderSrc, NULL); |
| 116 | glCompileShader(vShader); |
| 117 | |
| 118 | // Fragment shader |
| 119 | fShader = glCreateShader(GL_FRAGMENT_SHADER); |
| 120 | glShaderSource(fShader, 1, &fShaderSrc, NULL); |
| 121 | glCompileShader(fShader); |
| 122 | |
| 123 | // Program |
| 124 | sProg = glCreateProgram(); |
| 125 | glAttachShader(sProg, vShader); |
| 126 | glAttachShader(sProg, fShader); |
| 127 | glBindFragDataLocation(sProg, 0, "fragColor"); |
| 128 | glLinkProgram(sProg); |
| 129 | glUseProgram(sProg); |
| 130 | |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 131 | textureUniformY = glGetUniformLocation(sProg, "tex_y"); |
| 132 | textureUniformUV = glGetUniformLocation(sProg, "tex_uv"); |
| 133 | |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 134 | // Vertices position attrib |
| 135 | GLuint inPosAttrib = glGetAttribLocation(sProg, "in_Pos"); |
| 136 | glEnableVertexAttribArray(inPosAttrib); |
| 137 | glVertexAttribPointer(inPosAttrib, 2, GL_FLOAT, GL_FALSE, 4*sizeof(GLfloat), 0); |
| 138 | |
| 139 | // Texture position attrib |
| 140 | GLuint inTexCoordAttrib = glGetAttribLocation(sProg, "in_TexCoord"); |
| 141 | glEnableVertexAttribArray(inTexCoordAttrib); |
| 142 | glVertexAttribPointer(inTexCoordAttrib, 2, GL_FLOAT, GL_FALSE, 4*sizeof(GLfloat), (void*)(2*sizeof(GLfloat))); |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 143 | // TextureY |
| 144 | glActiveTexture(GL_TEXTURE0); |
| 145 | glGenTextures(1, &textureY); |
| 146 | glBindTexture(GL_TEXTURE_2D, textureY); |
| 147 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
| 148 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
| 149 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER); |
| 150 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER); |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 151 | |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 152 | // TextureUV |
| 153 | glActiveTexture(GL_TEXTURE1); |
| 154 | glGenTextures(1, &textureUV); |
| 155 | glBindTexture(GL_TEXTURE_2D, textureUV); |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 156 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
| 157 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
| 158 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER); |
| 159 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER); |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | - (NSOpenGLPixelFormat *)openGLPixelFormatForDisplayMask:(uint32_t)mask |
| 164 | { |
| 165 | NSOpenGLPixelFormatAttribute attrs[] = { |
| 166 | NSOpenGLPFANoRecovery, |
| 167 | NSOpenGLPFAColorSize, 24, |
| 168 | NSOpenGLPFAAlphaSize, 8, |
| 169 | NSOpenGLPFADoubleBuffer, |
| 170 | NSOpenGLPFAScreenMask, |
| 171 | mask, |
| 172 | NSOpenGLPFAAccelerated, |
| 173 | NSOpenGLPFAOpenGLProfile, |
| 174 | NSOpenGLProfileVersion3_2Core, |
| 175 | 0 |
| 176 | }; |
| 177 | |
| 178 | NSOpenGLPixelFormat* pixelFormat = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs]; |
| 179 | |
| 180 | return pixelFormat; |
| 181 | } |
| 182 | |
| 183 | - (BOOL)isAsynchronous |
| 184 | { |
| 185 | return YES; |
| 186 | } |
| 187 | |
| 188 | - (void)drawInOpenGLContext:(NSOpenGLContext *)context pixelFormat:(NSOpenGLPixelFormat *)pixelFormat forLayerTime:(CFTimeInterval)t displayTime:(const CVTimeStamp *)ts |
| 189 | { |
| 190 | GLenum errEnum; |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 191 | [currentFrameLk lock]; |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 192 | if(!currentFrameDisplayed && currentFrame) { |
| 193 | CVPixelBufferLockBaseAddress(currentFrame, 0); |
| 194 | [self configureTexture:textureY |
| 195 | index:0 |
| 196 | uniform:textureUniformY |
| 197 | activeTexture:GL_TEXTURE0 |
| 198 | format:GL_RED |
| 199 | fullPlane: YES]; |
| 200 | [self configureTexture:textureUV |
| 201 | index:1 |
| 202 | uniform:textureUniformUV |
| 203 | activeTexture:GL_TEXTURE1 |
| 204 | format:GL_RG |
| 205 | fullPlane: NO]; |
| 206 | CVPixelBufferUnlockBaseAddress(currentFrame, 0); |
| 207 | CVPixelBufferRelease(currentFrame); |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 208 | currentFrameDisplayed = YES; |
| 209 | } |
| 210 | // To ensure that we will not divide by zero |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 211 | if (currentFrame && currentWidth && currentHeight) { |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 212 | // Compute scaling factor to keep the original aspect ratio of the video |
| 213 | CGSize viewSize = self.frame.size; |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 214 | float viewRatio = (currentAngle == 90 || currentAngle == -90) ? |
| 215 | viewSize.height/viewSize.width : viewSize.width/viewSize.height; |
| 216 | float frameRatio = ((float)currentWidth)/((float)currentHeight); |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 217 | float ratio = viewRatio * (1/frameRatio); |
| 218 | |
| 219 | GLint inScalingUniform = glGetUniformLocation(sProg, "in_Scaling"); |
Kateryna Kostiuk | 1004caa | 2018-03-29 13:48:07 -0400 | [diff] [blame] | 220 | float multiplier = MAX(frameRatio, ratio); |
| 221 | if((viewRatio >= 1 && frameRatio >= 1) || |
| 222 | (viewRatio < 1 && frameRatio < 1) || |
| 223 | (ratio > 0.5 && ratio < 1.5) ) { |
| 224 | if (ratio > 1.0) |
| 225 | glUniform2f(inScalingUniform, 1.0, 1.0 * ratio); |
| 226 | else |
| 227 | glUniform2f(inScalingUniform, 1.0/ratio, 1.0); |
| 228 | } else { |
| 229 | if (ratio < 1.0) |
| 230 | glUniform2f(inScalingUniform, 1.0, 1.0 * ratio); |
| 231 | else |
| 232 | glUniform2f(inScalingUniform, 1.0/ratio, 1.0); |
Kateryna Kostiuk | 1004caa | 2018-03-29 13:48:07 -0400 | [diff] [blame] | 233 | } |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 234 | } |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 235 | |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 236 | // apply rotation |
| 237 | float radians = (currentAngle * M_PI) / 180; |
| 238 | float rotation[16] = |
| 239 | { |
| 240 | cos(radians), -sin(radians), 0.0f, 0.0f, |
| 241 | sin(radians), cos(radians), 0.0f, 0.0f, |
| 242 | 0.0f, 0.0f, 1.0f, 0.0f, |
| 243 | 0.0f, 0.0f, 0.0f, 1.0f |
| 244 | }; |
| 245 | GLint location = glGetUniformLocation(sProg, "in_rotationMatrix"); |
| 246 | glUniformMatrix4fv(location, 1, GL_FALSE, rotation); |
| 247 | |
| 248 | [currentFrameLk unlock]; |
| 249 | glClearColor(0.0f, 0.0f, 0.0f, 0.1f); |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 250 | glClear(GL_COLOR_BUFFER_BIT); |
| 251 | |
| 252 | if([self videoRunning]) |
| 253 | glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); |
| 254 | } |
| 255 | |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 256 | -(void)configureTexture:(GLuint)texture index:(int)index |
| 257 | uniform:(GLuint)uniform |
| 258 | activeTexture:(GLenum)activeTexture |
| 259 | format:(GLint)format |
| 260 | fullPlane:(BOOL)fullPlane { |
| 261 | auto plane = CVPixelBufferGetBaseAddressOfPlane(currentFrame, index); |
| 262 | auto width = CVPixelBufferGetWidthOfPlane(currentFrame, index); |
| 263 | auto height = CVPixelBufferGetHeightOfPlane(currentFrame, index); |
| 264 | auto strideWidth = CVPixelBufferGetBytesPerRowOfPlane(currentFrame, index); |
| 265 | strideWidth = fullPlane ? strideWidth : strideWidth * 0.5; |
| 266 | if(strideWidth > width) { |
| 267 | glPixelStorei(GL_UNPACK_ROW_LENGTH, strideWidth); |
| 268 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
| 269 | } else { |
| 270 | glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); |
| 271 | glPixelStorei(GL_UNPACK_ALIGNMENT, 0); |
| 272 | } |
| 273 | glActiveTexture(activeTexture); |
| 274 | glBindTexture(GL_TEXTURE_2D, texture); |
| 275 | glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, plane); |
| 276 | glUniform1i(uniform, index); |
| 277 | } |
| 278 | |
| 279 | -(void)fillWithBlack { |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 280 | [currentFrameLk lock]; |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 281 | if(currentFrame) { |
| 282 | currentFrame = nullptr; |
| 283 | currentFrameDisplayed = YES; |
| 284 | } |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 285 | [currentFrameLk unlock]; |
| 286 | } |
| 287 | |
Kateryna Kostiuk | 0668168 | 2020-05-07 20:50:56 -0400 | [diff] [blame] | 288 | -(void)renderWithPixelBuffer:(CVPixelBufferRef)buffer size:(CGSize)size rotation: (float)rotation fillFrame: (bool)fill { |
| 289 | [currentFrameLk lock]; |
| 290 | currentFrame = buffer; |
| 291 | CFRetain(currentFrame); |
| 292 | currentWidth = size.width; |
| 293 | currentHeight = size.height; |
| 294 | currentAngle = rotation; |
| 295 | currentFrameDisplayed = NO; |
| 296 | videoRunning = YES; |
| 297 | [currentFrameLk unlock]; |
| 298 | } |
| 299 | -(void)setupView { |
| 300 | } |
| 301 | |
Anthony Léonard | 14e7bf3 | 2017-06-08 08:13:16 -0400 | [diff] [blame] | 302 | @end |