| 1 | /***************************************************************************** |
| 2 | * Copyright (C) 2013 x265 project |
| 3 | * |
| 4 | * Authors: Steve Borho <steve@borho.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA. |
| 19 | * |
| 20 | * This program is also available under a commercial proprietary license. |
| 21 | * For more information, contact us at license @ x265.com. |
| 22 | *****************************************************************************/ |
| 23 | |
| 24 | #include "y4m.h" |
| 25 | #include "common.h" |
| 26 | |
| 27 | #include <iostream> |
| 28 | |
| 29 | #define ENABLE_THREADING 1 |
| 30 | |
| 31 | #if _WIN32 |
| 32 | #include <io.h> |
| 33 | #include <fcntl.h> |
| 34 | #if defined(_MSC_VER) |
| 35 | #pragma warning(disable: 4996) // POSIX setmode and fileno deprecated |
| 36 | #endif |
| 37 | #endif |
| 38 | |
| 39 | using namespace x265; |
| 40 | using namespace std; |
| 41 | |
| 42 | static const char header[] = "FRAME"; |
| 43 | |
| 44 | Y4MInput::Y4MInput(InputFileInfo& info) |
| 45 | { |
| 46 | for (int i = 0; i < QUEUE_SIZE; i++) |
| 47 | buf[i] = NULL; |
| 48 | |
| 49 | readCount.set(0); |
| 50 | writeCount.set(0); |
| 51 | |
| 52 | threadActive = false; |
| 53 | colorSpace = info.csp; |
| 54 | sarWidth = info.sarWidth; |
| 55 | sarHeight = info.sarHeight; |
| 56 | width = info.width; |
| 57 | height = info.height; |
| 58 | rateNum = info.fpsNum; |
| 59 | rateDenom = info.fpsDenom; |
| 60 | depth = info.depth; |
| 61 | framesize = 0; |
| 62 | |
| 63 | ifs = NULL; |
| 64 | if (!strcmp(info.filename, "-")) |
| 65 | { |
| 66 | ifs = &cin; |
| 67 | #if _WIN32 |
| 68 | setmode(fileno(stdin), O_BINARY); |
| 69 | #endif |
| 70 | } |
| 71 | else |
| 72 | ifs = new ifstream(info.filename, ios::binary | ios::in); |
| 73 | |
| 74 | if (ifs && ifs->good() && parseHeader()) |
| 75 | { |
| 76 | int pixelbytes = depth > 8 ? 2 : 1; |
| 77 | for (int i = 0; i < x265_cli_csps[colorSpace].planes; i++) |
| 78 | { |
| 79 | int stride = (width >> x265_cli_csps[colorSpace].width[i]) * pixelbytes; |
| 80 | framesize += (stride * (height >> x265_cli_csps[colorSpace].height[i])); |
| 81 | } |
| 82 | |
| 83 | threadActive = true; |
| 84 | for (int q = 0; q < QUEUE_SIZE; q++) |
| 85 | { |
| 86 | buf[q] = X265_MALLOC(char, framesize); |
| 87 | if (!buf[q]) |
| 88 | { |
| 89 | x265_log(NULL, X265_LOG_ERROR, "y4m: buffer allocation failure, aborting"); |
| 90 | threadActive = false; |
| 91 | break; |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | if (!threadActive) |
| 96 | { |
| 97 | if (ifs && ifs != &cin) |
| 98 | delete ifs; |
| 99 | ifs = NULL; |
| 100 | return; |
| 101 | } |
| 102 | |
| 103 | info.width = width; |
| 104 | info.height = height; |
| 105 | info.sarHeight = sarHeight; |
| 106 | info.sarWidth = sarWidth; |
| 107 | info.fpsNum = rateNum; |
| 108 | info.fpsDenom = rateDenom; |
| 109 | info.csp = colorSpace; |
| 110 | info.depth = depth; |
| 111 | info.frameCount = -1; |
| 112 | |
| 113 | size_t estFrameSize = framesize + strlen(header) + 1; /* assume basic FRAME\n headers */ |
| 114 | |
| 115 | /* try to estimate frame count, if this is not stdin */ |
| 116 | if (ifs != &cin) |
| 117 | { |
| 118 | istream::pos_type cur = ifs->tellg(); |
| 119 | |
| 120 | #if defined(_MSC_VER) && _MSC_VER < 1700 |
| 121 | /* Older MSVC versions cannot handle 64bit file sizes properly, so go native */ |
| 122 | HANDLE hFile = CreateFileA(info.filename, GENERIC_READ, |
| 123 | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, |
| 124 | FILE_ATTRIBUTE_NORMAL, NULL); |
| 125 | if (hFile != INVALID_HANDLE_VALUE) |
| 126 | { |
| 127 | LARGE_INTEGER size; |
| 128 | if (GetFileSizeEx(hFile, &size)) |
| 129 | info.frameCount = (int)((size.QuadPart - (int64_t)cur) / estFrameSize); |
| 130 | CloseHandle(hFile); |
| 131 | } |
| 132 | #else // if defined(_MSC_VER) && _MSC_VER < 1700 |
| 133 | if (cur >= 0) |
| 134 | { |
| 135 | ifs->seekg(0, ios::end); |
| 136 | istream::pos_type size = ifs->tellg(); |
| 137 | ifs->seekg(cur, ios::beg); |
| 138 | if (size > 0) |
| 139 | info.frameCount = (int)((size - cur) / estFrameSize); |
| 140 | } |
| 141 | #endif // if defined(_MSC_VER) && _MSC_VER < 1700 |
| 142 | } |
| 143 | |
| 144 | if (info.skipFrames) |
| 145 | { |
| 146 | #if X86_64 |
| 147 | ifs->seekg((uint64_t)estFrameSize * info.skipFrames, ios::cur); |
| 148 | #else |
| 149 | for (int i = 0; i < info.skipFrames; i++) |
| 150 | ifs->ignore(estFrameSize); |
| 151 | #endif |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | Y4MInput::~Y4MInput() |
| 156 | { |
| 157 | if (ifs && ifs != &cin) |
| 158 | delete ifs; |
| 159 | |
| 160 | for (int i = 0; i < QUEUE_SIZE; i++) |
| 161 | X265_FREE(buf[i]); |
| 162 | } |
| 163 | |
| 164 | void Y4MInput::release() |
| 165 | { |
| 166 | threadActive = false; |
| 167 | readCount.set(readCount.get()); // unblock file reader |
| 168 | stop(); |
| 169 | delete this; |
| 170 | } |
| 171 | |
| 172 | bool Y4MInput::parseHeader() |
| 173 | { |
| 174 | if (!ifs) |
| 175 | return false; |
| 176 | |
| 177 | int csp = 0; |
| 178 | int d = 0; |
| 179 | |
| 180 | while (!ifs->eof()) |
| 181 | { |
| 182 | // Skip Y4MPEG string |
| 183 | int c = ifs->get(); |
| 184 | while (!ifs->eof() && (c != ' ') && (c != '\n')) |
| 185 | { |
| 186 | c = ifs->get(); |
| 187 | } |
| 188 | |
| 189 | while (c == ' ' && !ifs->eof()) |
| 190 | { |
| 191 | // read parameter identifier |
| 192 | switch (ifs->get()) |
| 193 | { |
| 194 | case 'W': |
| 195 | width = 0; |
| 196 | while (!ifs->eof()) |
| 197 | { |
| 198 | c = ifs->get(); |
| 199 | |
| 200 | if (c == ' ' || c == '\n') |
| 201 | { |
| 202 | break; |
| 203 | } |
| 204 | else |
| 205 | { |
| 206 | width = width * 10 + (c - '0'); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | break; |
| 211 | |
| 212 | case 'H': |
| 213 | height = 0; |
| 214 | while (!ifs->eof()) |
| 215 | { |
| 216 | c = ifs->get(); |
| 217 | if (c == ' ' || c == '\n') |
| 218 | { |
| 219 | break; |
| 220 | } |
| 221 | else |
| 222 | { |
| 223 | height = height * 10 + (c - '0'); |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | break; |
| 228 | |
| 229 | case 'F': |
| 230 | rateNum = 0; |
| 231 | rateDenom = 0; |
| 232 | while (!ifs->eof()) |
| 233 | { |
| 234 | c = ifs->get(); |
| 235 | if (c == '.') |
| 236 | { |
| 237 | rateDenom = 1; |
| 238 | while (!ifs->eof()) |
| 239 | { |
| 240 | c = ifs->get(); |
| 241 | if (c == ' ' || c == '\n') |
| 242 | { |
| 243 | break; |
| 244 | } |
| 245 | else |
| 246 | { |
| 247 | rateNum = rateNum * 10 + (c - '0'); |
| 248 | rateDenom = rateDenom * 10; |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | break; |
| 253 | } |
| 254 | else if (c == ':') |
| 255 | { |
| 256 | while (!ifs->eof()) |
| 257 | { |
| 258 | c = ifs->get(); |
| 259 | if (c == ' ' || c == '\n') |
| 260 | { |
| 261 | break; |
| 262 | } |
| 263 | else |
| 264 | rateDenom = rateDenom * 10 + (c - '0'); |
| 265 | } |
| 266 | |
| 267 | break; |
| 268 | } |
| 269 | else |
| 270 | { |
| 271 | rateNum = rateNum * 10 + (c - '0'); |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | break; |
| 276 | |
| 277 | case 'A': |
| 278 | sarWidth = 0; |
| 279 | sarHeight = 0; |
| 280 | while (!ifs->eof()) |
| 281 | { |
| 282 | c = ifs->get(); |
| 283 | if (c == ':') |
| 284 | { |
| 285 | while (!ifs->eof()) |
| 286 | { |
| 287 | c = ifs->get(); |
| 288 | if (c == ' ' || c == '\n') |
| 289 | { |
| 290 | break; |
| 291 | } |
| 292 | else |
| 293 | sarHeight = sarHeight * 10 + (c - '0'); |
| 294 | } |
| 295 | |
| 296 | break; |
| 297 | } |
| 298 | else |
| 299 | { |
| 300 | sarWidth = sarWidth * 10 + (c - '0'); |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | break; |
| 305 | |
| 306 | case 'C': |
| 307 | csp = 0; |
| 308 | d = 0; |
| 309 | while (!ifs->eof()) |
| 310 | { |
| 311 | c = ifs->get(); |
| 312 | |
| 313 | if (c <= '9' && c >= '0') |
| 314 | { |
| 315 | csp = csp * 10 + (c - '0'); |
| 316 | } |
| 317 | else if (c == 'p') |
| 318 | { |
| 319 | // example: C420p16 |
| 320 | while (!ifs->eof()) |
| 321 | { |
| 322 | c = ifs->get(); |
| 323 | |
| 324 | if (c <= '9' && c >= '0') |
| 325 | d = d * 10 + (c - '0'); |
| 326 | else |
| 327 | break; |
| 328 | } |
| 329 | break; |
| 330 | } |
| 331 | else |
| 332 | break; |
| 333 | } |
| 334 | |
| 335 | if (d >= 8 && d <= 16) |
| 336 | depth = d; |
| 337 | colorSpace = (csp == 444) ? X265_CSP_I444 : (csp == 422) ? X265_CSP_I422 : X265_CSP_I420; |
| 338 | break; |
| 339 | |
| 340 | default: |
| 341 | while (!ifs->eof()) |
| 342 | { |
| 343 | // consume this unsupported configuration word |
| 344 | c = ifs->get(); |
| 345 | if (c == ' ' || c == '\n') |
| 346 | break; |
| 347 | } |
| 348 | |
| 349 | break; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | if (c == '\n') |
| 354 | { |
| 355 | break; |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | if (width < MIN_FRAME_WIDTH || width > MAX_FRAME_WIDTH || |
| 360 | height < MIN_FRAME_HEIGHT || height > MAX_FRAME_HEIGHT || |
| 361 | (rateNum / rateDenom) < 1 || (rateNum / rateDenom) > MAX_FRAME_RATE || |
| 362 | colorSpace <= X265_CSP_I400 || colorSpace >= X265_CSP_COUNT) |
| 363 | return false; |
| 364 | |
| 365 | return true; |
| 366 | } |
| 367 | |
| 368 | void Y4MInput::startReader() |
| 369 | { |
| 370 | #if ENABLE_THREADING |
| 371 | if (threadActive) |
| 372 | start(); |
| 373 | #endif |
| 374 | } |
| 375 | |
| 376 | void Y4MInput::threadMain() |
| 377 | { |
| 378 | do |
| 379 | { |
| 380 | if (!populateFrameQueue()) |
| 381 | break; |
| 382 | } |
| 383 | while (threadActive); |
| 384 | |
| 385 | threadActive = false; |
| 386 | writeCount.set(writeCount.get()); // unblock readPicture |
| 387 | } |
| 388 | |
| 389 | bool Y4MInput::populateFrameQueue() |
| 390 | { |
| 391 | if (!ifs || ifs->fail()) |
| 392 | return false; |
| 393 | |
| 394 | /* strip off the FRAME header */ |
| 395 | char hbuf[sizeof(header)]; |
| 396 | |
| 397 | ifs->read(hbuf, strlen(header)); |
| 398 | if (ifs->eof()) |
| 399 | return false; |
| 400 | |
| 401 | if (!ifs->good() || memcmp(hbuf, header, strlen(header))) |
| 402 | { |
| 403 | x265_log(NULL, X265_LOG_ERROR, "y4m: frame header missing\n"); |
| 404 | return false; |
| 405 | } |
| 406 | |
| 407 | /* consume bytes up to line feed */ |
| 408 | int c = ifs->get(); |
| 409 | while (c != '\n' && ifs->good()) |
| 410 | c = ifs->get(); |
| 411 | |
| 412 | /* wait for room in the ring buffer */ |
| 413 | int written = writeCount.get(); |
| 414 | int read = readCount.get(); |
| 415 | while (written - read > QUEUE_SIZE - 2) |
| 416 | { |
| 417 | read = readCount.waitForChange(read); |
| 418 | if (!threadActive) |
| 419 | return false; |
| 420 | } |
| 421 | |
| 422 | ifs->read(buf[written % QUEUE_SIZE], framesize); |
| 423 | if (ifs->good()) |
| 424 | { |
| 425 | writeCount.incr(); |
| 426 | return true; |
| 427 | } |
| 428 | else |
| 429 | return false; |
| 430 | } |
| 431 | |
| 432 | bool Y4MInput::readPicture(x265_picture& pic) |
| 433 | { |
| 434 | int read = readCount.get(); |
| 435 | int written = writeCount.get(); |
| 436 | |
| 437 | #if ENABLE_THREADING |
| 438 | |
| 439 | /* only wait if the read thread is still active */ |
| 440 | while (threadActive && read == written) |
| 441 | written = writeCount.waitForChange(written); |
| 442 | |
| 443 | #else |
| 444 | |
| 445 | populateFrameQueue(); |
| 446 | |
| 447 | #endif // if ENABLE_THREADING |
| 448 | |
| 449 | if (read < written) |
| 450 | { |
| 451 | int pixelbytes = depth > 8 ? 2 : 1; |
| 452 | pic.bitDepth = depth; |
| 453 | pic.colorSpace = colorSpace; |
| 454 | pic.stride[0] = width * pixelbytes; |
| 455 | pic.stride[1] = pic.stride[0] >> x265_cli_csps[colorSpace].width[1]; |
| 456 | pic.stride[2] = pic.stride[0] >> x265_cli_csps[colorSpace].width[2]; |
| 457 | pic.planes[0] = buf[read % QUEUE_SIZE]; |
| 458 | pic.planes[1] = (char*)pic.planes[0] + pic.stride[0] * height; |
| 459 | pic.planes[2] = (char*)pic.planes[1] + pic.stride[1] * (height >> x265_cli_csps[colorSpace].height[1]); |
| 460 | readCount.incr(); |
| 461 | return true; |
| 462 | } |
| 463 | else |
| 464 | return false; |
| 465 | } |
| 466 | |