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| 1 /* | |
| 2 * libjingle | |
| 3 * Copyright 2004--2014 Google Inc. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright notice, | |
| 9 * this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 11 * this list of conditions and the following disclaimer in the documentation | |
| 12 * and/or other materials provided with the distribution. | |
| 13 * 3. The name of the author may not be used to endorse or promote products | |
| 14 * derived from this software without specific prior written permission. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
| 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
| 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
| 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
| 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
| 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
| 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #include "talk/media/base/yuvframegenerator.h" | |
| 29 | |
| 30 #include <string.h> | |
| 31 #include <sstream> | |
| 32 | |
| 33 #include "webrtc/base/basictypes.h" | |
| 34 #include "webrtc/base/common.h" | |
| 35 | |
| 36 namespace cricket { | |
| 37 | |
| 38 // These values were figured out by trial and error. If you change any | |
| 39 // basic parameters e.g. unit-bar size or bars-x-offset, you may need to change | |
| 40 // background-width/background-height. | |
| 41 const int kBarcodeBackgroundWidth = 160; | |
| 42 const int kBarcodeBackgroundHeight = 100; | |
| 43 const int kBarsXOffset = 12; | |
| 44 const int kBarsYOffset = 4; | |
| 45 const int kUnitBarSize = 2; | |
| 46 const int kBarcodeNormalBarHeight = 80; | |
| 47 const int kBarcodeGuardBarHeight = 96; | |
| 48 const int kBarcodeMaxEncodableDigits = 7; | |
| 49 | |
| 50 YuvFrameGenerator::YuvFrameGenerator(int width, int height, | |
| 51 bool enable_barcode) { | |
| 52 width_ = width; | |
| 53 height_ = height; | |
| 54 frame_index_ = 0; | |
| 55 int size = width_ * height_; | |
| 56 int qsize = size / 4; | |
| 57 frame_data_size_ = size + 2 * qsize; | |
| 58 y_data_ = new uint8_t[size]; | |
| 59 u_data_ = new uint8_t[qsize]; | |
| 60 v_data_ = new uint8_t[qsize]; | |
| 61 if (enable_barcode) { | |
| 62 ASSERT(width_ >= kBarcodeBackgroundWidth); | |
| 63 ASSERT(height_>= kBarcodeBackgroundHeight); | |
| 64 barcode_start_x_ = 0; | |
| 65 barcode_start_y_ = height_ - kBarcodeBackgroundHeight; | |
| 66 } else { | |
| 67 barcode_start_x_ = -1; | |
| 68 barcode_start_y_ = -1; | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 YuvFrameGenerator::~YuvFrameGenerator() { | |
| 73 delete y_data_; | |
| 74 delete u_data_; | |
| 75 delete v_data_; | |
| 76 } | |
| 77 | |
| 78 void YuvFrameGenerator::GenerateNextFrame(uint8_t* frame_buffer, | |
| 79 int32_t barcode_value) { | |
| 80 int size = width_ * height_; | |
| 81 int qsize = size / 4; | |
| 82 memset(y_data_, 0, size); | |
| 83 memset(u_data_, 0, qsize); | |
| 84 memset(v_data_, 0, qsize); | |
| 85 | |
| 86 DrawLandscape(y_data_, width_, height_); | |
| 87 DrawGradientX(u_data_, width_/2, height_/2); | |
| 88 DrawGradientY(v_data_, width_/2, height_/2); | |
| 89 DrawMovingLineX(u_data_, width_/2, height_/2, frame_index_); | |
| 90 DrawMovingLineY(v_data_, width_/2, height_/2, frame_index_); | |
| 91 DrawBouncingCube(y_data_, width_, height_, frame_index_); | |
| 92 | |
| 93 if (barcode_value >= 0) { | |
| 94 ASSERT(barcode_start_x_ != -1); | |
| 95 DrawBarcode(barcode_value); | |
| 96 } | |
| 97 | |
| 98 memcpy(frame_buffer, y_data_, size); | |
| 99 frame_buffer += size; | |
| 100 memcpy(frame_buffer, u_data_, qsize); | |
| 101 frame_buffer += qsize; | |
| 102 memcpy(frame_buffer, v_data_, qsize); | |
| 103 | |
| 104 frame_index_ = (frame_index_ + 1) & 0x0000FFFF; | |
| 105 } | |
| 106 | |
| 107 void YuvFrameGenerator::DrawLandscape(uint8_t* p, int w, int h) { | |
| 108 int x, y; | |
| 109 for (y = 0; y < h; y++) { | |
| 110 for (x = 0; x < w; x++) { | |
| 111 p[x + y * w] = x % (y+1); | |
| 112 if (((x > w / 2 - (w / 32)) && (x < w / 2 + (w / 32))) || | |
| 113 ((y > h / 2 - (h / 32)) && (y < h / 2 + (h / 32)))) { | |
| 114 p[x + y * w] = (((x + y) / 8 % 2)) ? 255 : 0; | |
| 115 } | |
| 116 } | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 void YuvFrameGenerator::DrawGradientX(uint8_t* p, int w, int h) { | |
| 121 int x, y; | |
| 122 for (y = 0; y < h; y++) { | |
| 123 for (x = 0; x < w; x++) { | |
| 124 p[x + y * w] = (x << 8) / w; | |
| 125 } | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 void YuvFrameGenerator::DrawGradientY(uint8_t* p, int w, int h) { | |
| 130 int x, y; | |
| 131 for (y = 0; y < h; y++) { | |
| 132 for (x = 0; x < w; x++) { | |
| 133 p[x + y * w] = (y << 8) / h; | |
| 134 } | |
| 135 } | |
| 136 } | |
| 137 | |
| 138 void YuvFrameGenerator::DrawMovingLineX(uint8_t* p, int w, int h, int n) { | |
| 139 int x, y; | |
| 140 x = n % (w * 2); | |
| 141 if (x >= w) x = w + w - x - 1; | |
| 142 for (y = 0; y < h; y++) { | |
| 143 p[x + y * w] = 255; | |
| 144 } | |
| 145 } | |
| 146 | |
| 147 void YuvFrameGenerator::DrawMovingLineY(uint8_t* p, int w, int h, int n) { | |
| 148 int x, y; | |
| 149 y = n % (h * 2); | |
| 150 if (y >= h) y = h + h - y - 1; | |
| 151 for (x = 0; x < w; x++) { | |
| 152 p[x + y * w] = 255; | |
| 153 } | |
| 154 } | |
| 155 | |
| 156 void YuvFrameGenerator::DrawBouncingCube(uint8_t* p, int w, int h, int n) { | |
| 157 int x, y, pw, ph, px, py; | |
| 158 pw = w / 16; | |
| 159 ph = h / 16; | |
| 160 px = n % (w * 2); | |
| 161 py = n % (h * 2); | |
| 162 if (px >= w) px = w + w - px - 1; | |
| 163 if (py >= h) py = h + h - py - 1; | |
| 164 for (y = py - ph; y < py + ph; y++) { | |
| 165 if (y >=0 && y < h) { | |
| 166 for (x = px - pw; x < px + pw; x++) { | |
| 167 if (x >= 0 && x < w) { | |
| 168 p[x + y * w] = 255; | |
| 169 } | |
| 170 } | |
| 171 } | |
| 172 } | |
| 173 } | |
| 174 | |
| 175 void YuvFrameGenerator::GetBarcodeBounds(int* top, int* left, | |
| 176 int* width, int* height) { | |
| 177 ASSERT(barcode_start_x_ != -1); | |
| 178 *top = barcode_start_y_; | |
| 179 *left = barcode_start_x_; | |
| 180 *width = kBarcodeBackgroundWidth; | |
| 181 *height = kBarcodeBackgroundHeight; | |
| 182 } | |
| 183 | |
| 184 static void ComputeBarcodeDigits(uint32_t value, std::stringstream* result) { | |
| 185 // Serialize |value| as 7-char string, padded with 0's to the left. | |
| 186 result->width(kBarcodeMaxEncodableDigits); | |
| 187 result->fill('0'); | |
| 188 *result << value; | |
| 189 | |
| 190 // Compute check-digit and append to result. Steps described here: | |
| 191 // http://en.wikipedia.org/wiki/European_Article_Number#Calculation_of_checksu
m_digit | |
| 192 int sum = 0; | |
| 193 for (int pos = 1; pos <= kBarcodeMaxEncodableDigits; pos++) { | |
| 194 char next_char; | |
| 195 result->get(next_char); | |
| 196 uint8_t digit = next_char - '0'; | |
| 197 sum += digit * (pos % 2 ? 3 : 1); | |
| 198 } | |
| 199 uint8_t check_digit = sum % 10; | |
| 200 if (check_digit != 0) { | |
| 201 check_digit = 10 - check_digit; | |
| 202 } | |
| 203 | |
| 204 *result << static_cast<int>(check_digit); | |
| 205 result->seekg(0); | |
| 206 } | |
| 207 | |
| 208 void YuvFrameGenerator::DrawBarcode(uint32_t value) { | |
| 209 std::stringstream value_str_stream; | |
| 210 ComputeBarcodeDigits(value, &value_str_stream); | |
| 211 | |
| 212 // Draw white filled rectangle as background to barcode. | |
| 213 DrawBlockRectangle(y_data_, barcode_start_x_, barcode_start_y_, | |
| 214 kBarcodeBackgroundWidth, kBarcodeBackgroundHeight, | |
| 215 width_, 255); | |
| 216 DrawBlockRectangle(u_data_, barcode_start_x_ / 2, barcode_start_y_ / 2, | |
| 217 kBarcodeBackgroundWidth / 2, kBarcodeBackgroundHeight / 2, | |
| 218 width_ / 2, 128); | |
| 219 DrawBlockRectangle(v_data_, barcode_start_x_ / 2, barcode_start_y_ / 2, | |
| 220 kBarcodeBackgroundWidth / 2, kBarcodeBackgroundHeight / 2, | |
| 221 width_ / 2, 128); | |
| 222 | |
| 223 // Scan through chars (digits) and draw black bars. | |
| 224 int x = barcode_start_x_ + kBarsXOffset; | |
| 225 int y = barcode_start_y_ + kBarsYOffset; | |
| 226 int pos = 0; | |
| 227 x = DrawSideGuardBars(x, y, kBarcodeGuardBarHeight); | |
| 228 while (true) { | |
| 229 char next_char; | |
| 230 value_str_stream.get(next_char); | |
| 231 if (!value_str_stream.good()) { | |
| 232 break; | |
| 233 } | |
| 234 if (pos++ == 4) { | |
| 235 x = DrawMiddleGuardBars(x, y, kBarcodeGuardBarHeight); | |
| 236 } | |
| 237 uint8_t digit = next_char - '0'; | |
| 238 x = DrawEanEncodedDigit(digit, x, y, kBarcodeNormalBarHeight, pos > 4); | |
| 239 } | |
| 240 x = DrawSideGuardBars(x, y, kBarcodeGuardBarHeight); | |
| 241 } | |
| 242 | |
| 243 int YuvFrameGenerator::DrawMiddleGuardBars(int x, int y, int height) { | |
| 244 x += kUnitBarSize; | |
| 245 DrawBlockRectangle(y_data_, x, y, kUnitBarSize, height, width_, 0); | |
| 246 x += (kUnitBarSize * 2); | |
| 247 DrawBlockRectangle(y_data_, x, y, kUnitBarSize, height, width_, 0); | |
| 248 return x + (kUnitBarSize * 2); | |
| 249 } | |
| 250 | |
| 251 int YuvFrameGenerator::DrawSideGuardBars(int x, int y, int height) { | |
| 252 DrawBlockRectangle(y_data_, x, y, kUnitBarSize, height, width_, 0); | |
| 253 x += (kUnitBarSize * 2); | |
| 254 DrawBlockRectangle(y_data_, x, y, kUnitBarSize, height, width_, 0); | |
| 255 return x + kUnitBarSize; | |
| 256 } | |
| 257 | |
| 258 // For each digit: 0-9, |kEanEncodings| contains a bit-mask indicating | |
| 259 // which bars are black (1) and which are blank (0). These are for the L-code | |
| 260 // only. R-code values are bitwise negation of these. Reference: | |
| 261 // http://en.wikipedia.org/wiki/European_Article_Number#Binary_encoding_of_data_
digits_into_EAN-13_barcode // NOLINT | |
| 262 const uint8_t kEanEncodings[] = {13, 25, 19, 61, 35, 49, 47, 59, 55, 11}; | |
| 263 | |
| 264 int YuvFrameGenerator::DrawEanEncodedDigit(int digit, int x, int y, | |
| 265 int height, bool flip) { | |
| 266 uint8_t ean_encoding = kEanEncodings[digit]; | |
| 267 if (flip) { | |
| 268 ean_encoding = ~ean_encoding; | |
| 269 } | |
| 270 uint8_t mask = 0x40; | |
| 271 for (int i = 6; i >= 0; i--, mask >>= 1) { | |
| 272 if (ean_encoding & mask) { | |
| 273 DrawBlockRectangle(y_data_, x, y, kUnitBarSize, height, width_, 0); | |
| 274 } | |
| 275 x += kUnitBarSize; | |
| 276 } | |
| 277 return x; | |
| 278 } | |
| 279 | |
| 280 void YuvFrameGenerator::DrawBlockRectangle(uint8_t* p, | |
| 281 int x_start, | |
| 282 int y_start, | |
| 283 int width, | |
| 284 int height, | |
| 285 int pitch, | |
| 286 uint8_t value) { | |
| 287 for (int x = x_start; x < x_start + width; x++) { | |
| 288 for (int y = y_start; y < y_start + height; y++) { | |
| 289 p[x + y * pitch] = value; | |
| 290 } | |
| 291 } | |
| 292 } | |
| 293 | |
| 294 } // namespace cricket | |
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Chromium Code Reviews
Issue 1587193006:
Move talk/media to webrtc/media (Closed)
Base URL: https://chromium.googlesource.com/external/webrtc.git@master