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| 1 /* | |
| 2 * Copyright (c) 2012 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 #if !defined(__has_feature) || !__has_feature(objc_arc) | |
| 12 #error "This file requires ARC support." | |
| 13 #endif | |
| 14 | |
| 15 // This files is mostly copied from | |
| 16 // webrtc/modules/video_render/android/video_render_opengles20.h | |
| 17 | |
| 18 // TODO(sjlee): unify this copy with the android one. | |
| 19 #include "webrtc/modules/video_render/ios/open_gles20.h" | |
| 20 #include "webrtc/system_wrappers/include/trace.h" | |
| 21 | |
| 22 using namespace webrtc; | |
| 23 | |
| 24 const char OpenGles20::indices_[] = {0, 3, 2, 0, 2, 1}; | |
| 25 | |
| 26 const char OpenGles20::vertext_shader_[] = { | |
| 27 "attribute vec4 aPosition;\n" | |
| 28 "attribute vec2 aTextureCoord;\n" | |
| 29 "varying vec2 vTextureCoord;\n" | |
| 30 "void main() {\n" | |
| 31 " gl_Position = aPosition;\n" | |
| 32 " vTextureCoord = aTextureCoord;\n" | |
| 33 "}\n"}; | |
| 34 | |
| 35 // The fragment shader. | |
| 36 // Do YUV to RGB565 conversion. | |
| 37 const char OpenGles20::fragment_shader_[] = { | |
| 38 "precision mediump float;\n" | |
| 39 "uniform sampler2D Ytex;\n" | |
| 40 "uniform sampler2D Utex,Vtex;\n" | |
| 41 "varying vec2 vTextureCoord;\n" | |
| 42 "void main(void) {\n" | |
| 43 " float nx,ny,r,g,b,y,u,v;\n" | |
| 44 " mediump vec4 txl,ux,vx;" | |
| 45 " nx=vTextureCoord[0];\n" | |
| 46 " ny=vTextureCoord[1];\n" | |
| 47 " y=texture2D(Ytex,vec2(nx,ny)).r;\n" | |
| 48 " u=texture2D(Utex,vec2(nx,ny)).r;\n" | |
| 49 " v=texture2D(Vtex,vec2(nx,ny)).r;\n" | |
| 50 " y=1.1643*(y-0.0625);\n" | |
| 51 " u=u-0.5;\n" | |
| 52 " v=v-0.5;\n" | |
| 53 " r=y+1.5958*v;\n" | |
| 54 " g=y-0.39173*u-0.81290*v;\n" | |
| 55 " b=y+2.017*u;\n" | |
| 56 " gl_FragColor=vec4(r,g,b,1.0);\n" | |
| 57 "}\n"}; | |
| 58 | |
| 59 OpenGles20::OpenGles20() : texture_width_(-1), texture_height_(-1) { | |
| 60 texture_ids_[0] = 0; | |
| 61 texture_ids_[1] = 0; | |
| 62 texture_ids_[2] = 0; | |
| 63 | |
| 64 program_ = 0; | |
| 65 | |
| 66 const GLfloat vertices[20] = { | |
| 67 // X, Y, Z, U, V | |
| 68 -1, -1, 0, 0, 1, // Bottom Left | |
| 69 1, -1, 0, 1, 1, // Bottom Right | |
| 70 1, 1, 0, 1, 0, // Top Right | |
| 71 -1, 1, 0, 0, 0}; // Top Left | |
| 72 | |
| 73 memcpy(vertices_, vertices, sizeof(vertices_)); | |
| 74 } | |
| 75 | |
| 76 OpenGles20::~OpenGles20() { | |
| 77 if (program_) { | |
| 78 glDeleteTextures(3, texture_ids_); | |
| 79 glDeleteProgram(program_); | |
| 80 } | |
| 81 } | |
| 82 | |
| 83 bool OpenGles20::Setup(int32_t width, int32_t height) { | |
| 84 program_ = CreateProgram(vertext_shader_, fragment_shader_); | |
| 85 if (!program_) { | |
| 86 return false; | |
| 87 } | |
| 88 | |
| 89 int position_handle = glGetAttribLocation(program_, "aPosition"); | |
| 90 int texture_handle = glGetAttribLocation(program_, "aTextureCoord"); | |
| 91 | |
| 92 // set the vertices array in the shader | |
| 93 // vertices_ contains 4 vertices with 5 coordinates. | |
| 94 // 3 for (xyz) for the vertices and 2 for the texture | |
| 95 glVertexAttribPointer( | |
| 96 position_handle, 3, GL_FLOAT, false, 5 * sizeof(GLfloat), vertices_); | |
| 97 | |
| 98 glEnableVertexAttribArray(position_handle); | |
| 99 | |
| 100 // set the texture coordinate array in the shader | |
| 101 // vertices_ contains 4 vertices with 5 coordinates. | |
| 102 // 3 for (xyz) for the vertices and 2 for the texture | |
| 103 glVertexAttribPointer( | |
| 104 texture_handle, 2, GL_FLOAT, false, 5 * sizeof(GLfloat), &vertices_[3]); | |
| 105 glEnableVertexAttribArray(texture_handle); | |
| 106 | |
| 107 glUseProgram(program_); | |
| 108 int i = glGetUniformLocation(program_, "Ytex"); | |
| 109 glUniform1i(i, 0); /* Bind Ytex to texture unit 0 */ | |
| 110 | |
| 111 i = glGetUniformLocation(program_, "Utex"); | |
| 112 glUniform1i(i, 1); /* Bind Utex to texture unit 1 */ | |
| 113 | |
| 114 i = glGetUniformLocation(program_, "Vtex"); | |
| 115 glUniform1i(i, 2); /* Bind Vtex to texture unit 2 */ | |
| 116 | |
| 117 glViewport(0, 0, width, height); | |
| 118 return true; | |
| 119 } | |
| 120 | |
| 121 bool OpenGles20::SetCoordinates(const float z_order, | |
| 122 const float left, | |
| 123 const float top, | |
| 124 const float right, | |
| 125 const float bottom) { | |
| 126 if (top > 1 || top < 0 || right > 1 || right < 0 || bottom > 1 || | |
| 127 bottom < 0 || left > 1 || left < 0) { | |
| 128 return false; | |
| 129 } | |
| 130 | |
| 131 // Bottom Left | |
| 132 vertices_[0] = (left * 2) - 1; | |
| 133 vertices_[1] = -1 * (2 * bottom) + 1; | |
| 134 vertices_[2] = z_order; | |
| 135 | |
| 136 // Bottom Right | |
| 137 vertices_[5] = (right * 2) - 1; | |
| 138 vertices_[6] = -1 * (2 * bottom) + 1; | |
| 139 vertices_[7] = z_order; | |
| 140 | |
| 141 // Top Right | |
| 142 vertices_[10] = (right * 2) - 1; | |
| 143 vertices_[11] = -1 * (2 * top) + 1; | |
| 144 vertices_[12] = z_order; | |
| 145 | |
| 146 // Top Left | |
| 147 vertices_[15] = (left * 2) - 1; | |
| 148 vertices_[16] = -1 * (2 * top) + 1; | |
| 149 vertices_[17] = z_order; | |
| 150 | |
| 151 return true; | |
| 152 } | |
| 153 | |
| 154 bool OpenGles20::Render(const VideoFrame& frame) { | |
| 155 if (texture_width_ != (GLsizei)frame.width() || | |
| 156 texture_height_ != (GLsizei)frame.height()) { | |
| 157 SetupTextures(frame); | |
| 158 } | |
| 159 UpdateTextures(frame); | |
| 160 | |
| 161 glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, indices_); | |
| 162 | |
| 163 return true; | |
| 164 } | |
| 165 | |
| 166 GLuint OpenGles20::LoadShader(GLenum shader_type, const char* shader_source) { | |
| 167 GLuint shader = glCreateShader(shader_type); | |
| 168 if (shader) { | |
| 169 glShaderSource(shader, 1, &shader_source, NULL); | |
| 170 glCompileShader(shader); | |
| 171 | |
| 172 GLint compiled = 0; | |
| 173 glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled); | |
| 174 if (!compiled) { | |
| 175 GLint info_len = 0; | |
| 176 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &info_len); | |
| 177 if (info_len) { | |
| 178 char* buf = (char*)malloc(info_len); | |
| 179 glGetShaderInfoLog(shader, info_len, NULL, buf); | |
| 180 WEBRTC_TRACE(kTraceError, | |
| 181 kTraceVideoRenderer, | |
| 182 0, | |
| 183 "%s: Could not compile shader %d: %s", | |
| 184 __FUNCTION__, | |
| 185 shader_type, | |
| 186 buf); | |
| 187 free(buf); | |
| 188 } | |
| 189 glDeleteShader(shader); | |
| 190 shader = 0; | |
| 191 } | |
| 192 } | |
| 193 return shader; | |
| 194 } | |
| 195 | |
| 196 GLuint OpenGles20::CreateProgram(const char* vertex_source, | |
| 197 const char* fragment_source) { | |
| 198 GLuint vertex_shader = LoadShader(GL_VERTEX_SHADER, vertex_source); | |
| 199 if (!vertex_shader) { | |
| 200 return -1; | |
| 201 } | |
| 202 | |
| 203 GLuint fragment_shader = LoadShader(GL_FRAGMENT_SHADER, fragment_source); | |
| 204 if (!fragment_shader) { | |
| 205 return -1; | |
| 206 } | |
| 207 | |
| 208 GLuint program = glCreateProgram(); | |
| 209 if (program) { | |
| 210 glAttachShader(program, vertex_shader); | |
| 211 glAttachShader(program, fragment_shader); | |
| 212 glLinkProgram(program); | |
| 213 GLint link_status = GL_FALSE; | |
| 214 glGetProgramiv(program, GL_LINK_STATUS, &link_status); | |
| 215 if (link_status != GL_TRUE) { | |
| 216 GLint info_len = 0; | |
| 217 glGetProgramiv(program, GL_INFO_LOG_LENGTH, &info_len); | |
| 218 if (info_len) { | |
| 219 char* buf = (char*)malloc(info_len); | |
| 220 glGetProgramInfoLog(program, info_len, NULL, buf); | |
| 221 WEBRTC_TRACE(kTraceError, | |
| 222 kTraceVideoRenderer, | |
| 223 0, | |
| 224 "%s: Could not link program: %s", | |
| 225 __FUNCTION__, | |
| 226 buf); | |
| 227 free(buf); | |
| 228 } | |
| 229 glDeleteProgram(program); | |
| 230 program = 0; | |
| 231 } | |
| 232 } | |
| 233 | |
| 234 if (vertex_shader) { | |
| 235 glDeleteShader(vertex_shader); | |
| 236 } | |
| 237 | |
| 238 if (fragment_shader) { | |
| 239 glDeleteShader(fragment_shader); | |
| 240 } | |
| 241 | |
| 242 return program; | |
| 243 } | |
| 244 | |
| 245 static void InitializeTexture(int name, int id, int width, int height) { | |
| 246 glActiveTexture(name); | |
| 247 glBindTexture(GL_TEXTURE_2D, id); | |
| 248 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); | |
| 249 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); | |
| 250 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); | |
| 251 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); | |
| 252 glPixelStorei(GL_UNPACK_ALIGNMENT, 1); | |
| 253 glTexImage2D(GL_TEXTURE_2D, | |
| 254 0, | |
| 255 GL_LUMINANCE, | |
| 256 width, | |
| 257 height, | |
| 258 0, | |
| 259 GL_LUMINANCE, | |
| 260 GL_UNSIGNED_BYTE, | |
| 261 NULL); | |
| 262 } | |
| 263 | |
| 264 void OpenGles20::SetupTextures(const VideoFrame& frame) { | |
| 265 const GLsizei width = frame.width(); | |
| 266 const GLsizei height = frame.height(); | |
| 267 | |
| 268 if (!texture_ids_[0]) { | |
| 269 glGenTextures(3, texture_ids_); // Generate the Y, U and V texture | |
| 270 } | |
| 271 | |
| 272 InitializeTexture(GL_TEXTURE0, texture_ids_[0], width, height); | |
| 273 InitializeTexture(GL_TEXTURE1, texture_ids_[1], width / 2, height / 2); | |
| 274 InitializeTexture(GL_TEXTURE2, texture_ids_[2], width / 2, height / 2); | |
| 275 | |
| 276 texture_width_ = width; | |
| 277 texture_height_ = height; | |
| 278 } | |
| 279 | |
| 280 // Uploads a plane of pixel data, accounting for stride != width*bpp. | |
| 281 static void GlTexSubImage2D(GLsizei width, | |
| 282 GLsizei height, | |
| 283 int stride, | |
| 284 const uint8_t* plane) { | |
| 285 if (stride == width) { | |
| 286 // Yay! We can upload the entire plane in a single GL call. | |
| 287 glTexSubImage2D(GL_TEXTURE_2D, | |
| 288 0, | |
| 289 0, | |
| 290 0, | |
| 291 width, | |
| 292 height, | |
| 293 GL_LUMINANCE, | |
| 294 GL_UNSIGNED_BYTE, | |
| 295 static_cast<const GLvoid*>(plane)); | |
| 296 } else { | |
| 297 // Boo! Since GLES2 doesn't have GL_UNPACK_ROW_LENGTH and iOS doesn't | |
| 298 // have GL_EXT_unpack_subimage we have to upload a row at a time. Ick. | |
| 299 for (int row = 0; row < height; ++row) { | |
| 300 glTexSubImage2D(GL_TEXTURE_2D, | |
| 301 0, | |
| 302 0, | |
| 303 row, | |
| 304 width, | |
| 305 1, | |
| 306 GL_LUMINANCE, | |
| 307 GL_UNSIGNED_BYTE, | |
| 308 static_cast<const GLvoid*>(plane + (row * stride))); | |
| 309 } | |
| 310 } | |
| 311 } | |
| 312 | |
| 313 void OpenGles20::UpdateTextures(const VideoFrame& frame) { | |
| 314 const GLsizei width = frame.width(); | |
| 315 const GLsizei height = frame.height(); | |
| 316 | |
| 317 glActiveTexture(GL_TEXTURE0); | |
| 318 glBindTexture(GL_TEXTURE_2D, texture_ids_[0]); | |
| 319 GlTexSubImage2D(width, height, frame.stride(kYPlane), frame.buffer(kYPlane)); | |
| 320 | |
| 321 glActiveTexture(GL_TEXTURE1); | |
| 322 glBindTexture(GL_TEXTURE_2D, texture_ids_[1]); | |
| 323 GlTexSubImage2D( | |
| 324 width / 2, height / 2, frame.stride(kUPlane), frame.buffer(kUPlane)); | |
| 325 | |
| 326 glActiveTexture(GL_TEXTURE2); | |
| 327 glBindTexture(GL_TEXTURE_2D, texture_ids_[2]); | |
| 328 GlTexSubImage2D( | |
| 329 width / 2, height / 2, frame.stride(kVPlane), frame.buffer(kVPlane)); | |
| 330 } | |
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Chromium Code Reviews
Issue 1929223003:
Reland of Delete video_render module. (Closed)
Base URL: https://chromium.googlesource.com/external/webrtc.git@master