src/media/base/video_frame.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/base/video_frame.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/bind.h"
  10 #include "base/callback_helpers.h"
  11 #include "base/logging.h"
  12 #include "base/memory/aligned_memory.h"
  13 #include "base/strings/string_piece.h"
  14 #include "gpu/command_buffer/common/mailbox_holder.h"
  15 #include "media/base/limits.h"
  16 #include "media/base/video_util.h"
  17 #include "third_party/skia/include/core/SkBitmap.h"
  18
  19 namespace media {
  20
  21 static inline size_t RoundUp(size_t value, size_t alignment) {
  22   // Check that |alignment| is a power of 2.
  23   DCHECK((alignment + (alignment - 1)) == (alignment | (alignment - 1)));
  24   return ((value + (alignment - 1)) & ~(alignment - 1));
  25 }
  26
  27 // Rounds up |coded_size| if necessary for |format|.
  28 static gfx::Size AdjustCodedSize(VideoFrame::Format format,
  29                                  const gfx::Size& coded_size) {
  30   gfx::Size new_coded_size(coded_size);
  31   switch (format) {
  32     case VideoFrame::YV12:
  33     case VideoFrame::YV12A:
  34     case VideoFrame::I420:
  35     case VideoFrame::YV12J:
  36       new_coded_size.set_height(RoundUp(new_coded_size.height(), 2));
  37     // Fallthrough.
  38     case VideoFrame::YV16:
  39       new_coded_size.set_width(RoundUp(new_coded_size.width(), 2));
  40       break;
  41     default:
  42       break;
  43   }
  44   return new_coded_size;
  45 }
  46
  47 // static
  48 scoped_refptr<VideoFrame> VideoFrame::CreateFrame(
  49     VideoFrame::Format format,
  50     const gfx::Size& coded_size,
  51     const gfx::Rect& visible_rect,
  52     const gfx::Size& natural_size,
  53     base::TimeDelta timestamp) {
  54   DCHECK(format != VideoFrame::UNKNOWN &&
  55          format != VideoFrame::NV12 &&
  56          format != VideoFrame::NATIVE_TEXTURE);
  57 #if defined(VIDEO_HOLE)
  58   DCHECK(format != VideoFrame::HOLE);
  59 #endif  // defined(VIDEO_HOLE)
  60
  61   // Since we're creating a new YUV frame (and allocating memory for it
  62   // ourselves), we can pad the requested |coded_size| if necessary if the
  63   // request does not line up on sample boundaries.
  64   gfx::Size new_coded_size = AdjustCodedSize(format, coded_size);
  65   DCHECK(IsValidConfig(format, new_coded_size, visible_rect, natural_size));
  66
  67   scoped_refptr<VideoFrame> frame(
  68       new VideoFrame(format,
  69                      new_coded_size,
  70                      visible_rect,
  71                      natural_size,
  72                      scoped_ptr<gpu::MailboxHolder>(),
  73                      timestamp,
  74                      false));
  75   frame->AllocateYUV();
  76   return frame;
  77 }
  78
  79 // static
  80 std::string VideoFrame::FormatToString(VideoFrame::Format format) {
  81   switch (format) {
  82     case VideoFrame::UNKNOWN:
  83       return "UNKNOWN";
  84     case VideoFrame::YV12:
  85       return "YV12";
  86     case VideoFrame::YV16:
  87       return "YV16";
  88     case VideoFrame::I420:
  89       return "I420";
  90     case VideoFrame::NATIVE_TEXTURE:
  91       return "NATIVE_TEXTURE";
  92 #if defined(VIDEO_HOLE)
  93     case VideoFrame::HOLE:
  94       return "HOLE";
  95 #endif  // defined(VIDEO_HOLE)
  96     case VideoFrame::YV12A:
  97       return "YV12A";
  98     case VideoFrame::YV12J:
  99       return "YV12J";
 100     case VideoFrame::NV12:
 101       return "NV12";
 102     case VideoFrame::YV24:
 103       return "YV24";
 104   }
 105   NOTREACHED() << "Invalid videoframe format provided: " << format;
 106   return "";
 107 }
 108
 109 // static
 110 bool VideoFrame::IsValidConfig(VideoFrame::Format format,
 111                                const gfx::Size& coded_size,
 112                                const gfx::Rect& visible_rect,
 113                                const gfx::Size& natural_size) {
 114   // Check maximum limits for all formats.
 115   if (coded_size.GetArea() > limits::kMaxCanvas ||
 116       coded_size.width() > limits::kMaxDimension ||
 117       coded_size.height() > limits::kMaxDimension ||
 118       visible_rect.x() < 0 || visible_rect.y() < 0 ||
 119       visible_rect.right() > coded_size.width() ||
 120       visible_rect.bottom() > coded_size.height() ||
 121       natural_size.GetArea() > limits::kMaxCanvas ||
 122       natural_size.width() > limits::kMaxDimension ||
 123       natural_size.height() > limits::kMaxDimension)
 124     return false;
 125
 126   // Check format-specific width/height requirements.
 127   switch (format) {
 128     case VideoFrame::UNKNOWN:
 129       return (coded_size.IsEmpty() && visible_rect.IsEmpty() &&
 130               natural_size.IsEmpty());
 131     case VideoFrame::YV24:
 132       break;
 133     case VideoFrame::YV12:
 134     case VideoFrame::YV12J:
 135     case VideoFrame::I420:
 136     case VideoFrame::YV12A:
 137     case VideoFrame::NV12:
 138       // Subsampled YUV formats have width/height requirements.
 139       if (static_cast<size_t>(coded_size.height()) <
 140           RoundUp(visible_rect.bottom(), 2))
 141         return false;
 142     // Fallthrough.
 143     case VideoFrame::YV16:
 144       if (static_cast<size_t>(coded_size.width()) <
 145           RoundUp(visible_rect.right(), 2))
 146         return false;
 147       break;
 148     case VideoFrame::NATIVE_TEXTURE:
 149 #if defined(VIDEO_HOLE)
 150     case VideoFrame::HOLE:
 151 #endif  // defined(VIDEO_HOLE)
 152       // NATIVE_TEXTURE and HOLE have no software-allocated buffers and are
 153       // allowed to skip the below check and be empty.
 154       return true;
 155   }
 156
 157   // Check that software-allocated buffer formats are not empty.
 158   return (!coded_size.IsEmpty() && !visible_rect.IsEmpty() &&
 159           !natural_size.IsEmpty());
 160 }
 161
 162 // static
 163 scoped_refptr<VideoFrame> VideoFrame::WrapNativeTexture(
 164     scoped_ptr<gpu::MailboxHolder> mailbox_holder,
 165     const ReleaseMailboxCB& mailbox_holder_release_cb,
 166     const gfx::Size& coded_size,
 167     const gfx::Rect& visible_rect,
 168     const gfx::Size& natural_size,
 169     base::TimeDelta timestamp,
 170     const ReadPixelsCB& read_pixels_cb) {
 171   scoped_refptr<VideoFrame> frame(new VideoFrame(NATIVE_TEXTURE,
 172                                                  coded_size,
 173                                                  visible_rect,
 174                                                  natural_size,
 175                                                  mailbox_holder.Pass(),
 176                                                  timestamp,
 177                                                  false));
 178   frame->mailbox_holder_release_cb_ = mailbox_holder_release_cb;
 179   frame->read_pixels_cb_ = read_pixels_cb;
 180
 181   return frame;
 182 }
 183
 184 void VideoFrame::ReadPixelsFromNativeTexture(const SkBitmap& pixels) {
 185   DCHECK_EQ(format_, NATIVE_TEXTURE);
 186   if (!read_pixels_cb_.is_null())
 187     read_pixels_cb_.Run(pixels);
 188 }
 189
 190 // static
 191 scoped_refptr<VideoFrame> VideoFrame::WrapExternalPackedMemory(
 192     Format format,
 193     const gfx::Size& coded_size,
 194     const gfx::Rect& visible_rect,
 195     const gfx::Size& natural_size,
 196     uint8* data,
 197     size_t data_size,
 198     base::SharedMemoryHandle handle,
 199     base::TimeDelta timestamp,
 200     const base::Closure& no_longer_needed_cb) {
 201   gfx::Size new_coded_size = AdjustCodedSize(format, coded_size);
 202
 203   if (!IsValidConfig(format, new_coded_size, visible_rect, natural_size))
 204     return NULL;
 205   if (data_size < AllocationSize(format, new_coded_size))
 206     return NULL;
 207
 208   switch (format) {
 209     case VideoFrame::I420: {
 210       scoped_refptr<VideoFrame> frame(
 211           new VideoFrame(format,
 212                          new_coded_size,
 213                          visible_rect,
 214                          natural_size,
 215                          scoped_ptr<gpu::MailboxHolder>(),
 216                          timestamp,
 217                          false));
 218       frame->shared_memory_handle_ = handle;
 219       frame->strides_[kYPlane] = new_coded_size.width();
 220       frame->strides_[kUPlane] = new_coded_size.width() / 2;
 221       frame->strides_[kVPlane] = new_coded_size.width() / 2;
 222       frame->data_[kYPlane] = data;
 223       frame->data_[kUPlane] = data + new_coded_size.GetArea();
 224       frame->data_[kVPlane] = data + (new_coded_size.GetArea() * 5 / 4);
 225       frame->no_longer_needed_cb_ = no_longer_needed_cb;
 226       return frame;
 227     }
 228     default:
 229       NOTIMPLEMENTED();
 230       return NULL;
 231   }
 232 }
 233
 234 #if defined(OS_POSIX)
 235 // static
 236 scoped_refptr<VideoFrame> VideoFrame::WrapExternalDmabufs(
 237     Format format,
 238     const gfx::Size& coded_size,
 239     const gfx::Rect& visible_rect,
 240     const gfx::Size& natural_size,
 241     const std::vector<int> dmabuf_fds,
 242     base::TimeDelta timestamp,
 243     const base::Closure& no_longer_needed_cb) {
 244   if (!IsValidConfig(format, coded_size, visible_rect, natural_size))
 245     return NULL;
 246
 247   if (dmabuf_fds.size() != NumPlanes(format)) {
 248     LOG(FATAL) << "Not enough dmabuf fds provided!";
 249     return NULL;
 250   }
 251
 252   scoped_refptr<VideoFrame> frame(
 253       new VideoFrame(format,
 254                      coded_size,
 255                      visible_rect,
 256                      natural_size,
 257                      scoped_ptr<gpu::MailboxHolder>(),
 258                      timestamp,
 259                      false));
 260
 261   for (size_t i = 0; i < dmabuf_fds.size(); ++i) {
 262     int duped_fd = HANDLE_EINTR(dup(dmabuf_fds[i]));
 263     if (duped_fd == -1) {
 264       // The already-duped in previous iterations fds will be closed when
 265       // the partially-created frame drops out of scope here.
 266       DLOG(ERROR) << "Failed duplicating a dmabuf fd";
 267       return NULL;
 268     }
 269
 270     frame->dmabuf_fds_[i].reset(duped_fd);
 271     // Data is accessible only via fds.
 272     frame->data_[i] = NULL;
 273     frame->strides_[i] = 0;
 274   }
 275
 276   frame->no_longer_needed_cb_ = no_longer_needed_cb;
 277   return frame;
 278 }
 279 #endif
 280
 281 // static
 282 scoped_refptr<VideoFrame> VideoFrame::WrapExternalYuvData(
 283     Format format,
 284     const gfx::Size& coded_size,
 285     const gfx::Rect& visible_rect,
 286     const gfx::Size& natural_size,
 287     int32 y_stride,
 288     int32 u_stride,
 289     int32 v_stride,
 290     uint8* y_data,
 291     uint8* u_data,
 292     uint8* v_data,
 293     base::TimeDelta timestamp,
 294     const base::Closure& no_longer_needed_cb) {
 295   gfx::Size new_coded_size = AdjustCodedSize(format, coded_size);
 296   CHECK(IsValidConfig(format, new_coded_size, visible_rect, natural_size));
 297
 298   scoped_refptr<VideoFrame> frame(
 299       new VideoFrame(format,
 300                      new_coded_size,
 301                      visible_rect,
 302                      natural_size,
 303                      scoped_ptr<gpu::MailboxHolder>(),
 304                      timestamp,
 305                      false));
 306   frame->strides_[kYPlane] = y_stride;
 307   frame->strides_[kUPlane] = u_stride;
 308   frame->strides_[kVPlane] = v_stride;
 309   frame->data_[kYPlane] = y_data;
 310   frame->data_[kUPlane] = u_data;
 311   frame->data_[kVPlane] = v_data;
 312   frame->no_longer_needed_cb_ = no_longer_needed_cb;
 313   return frame;
 314 }
 315
 316 // static
 317 scoped_refptr<VideoFrame> VideoFrame::WrapVideoFrame(
 318       const scoped_refptr<VideoFrame>& frame,
 319       const gfx::Rect& visible_rect,
 320       const gfx::Size& natural_size,
 321       const base::Closure& no_longer_needed_cb) {
 322   // NATIVE_TEXTURE frames need mailbox info propagated, and there's no support
 323   // for that here yet, see http://crbug/362521.
 324   CHECK_NE(frame->format(), NATIVE_TEXTURE);
 325
 326   DCHECK(frame->visible_rect().Contains(visible_rect));
 327   scoped_refptr<VideoFrame> wrapped_frame(
 328       new VideoFrame(frame->format(),
 329                      frame->coded_size(),
 330                      visible_rect,
 331                      natural_size,
 332                      scoped_ptr<gpu::MailboxHolder>(),
 333                      frame->timestamp(),
 334                      frame->end_of_stream()));
 335
 336   for (size_t i = 0; i < NumPlanes(frame->format()); ++i) {
 337     wrapped_frame->strides_[i] = frame->stride(i);
 338     wrapped_frame->data_[i] = frame->data(i);
 339   }
 340
 341   wrapped_frame->no_longer_needed_cb_ = no_longer_needed_cb;
 342   return wrapped_frame;
 343 }
 344
 345 // static
 346 scoped_refptr<VideoFrame> VideoFrame::CreateEOSFrame() {
 347   return new VideoFrame(VideoFrame::UNKNOWN,
 348                         gfx::Size(),
 349                         gfx::Rect(),
 350                         gfx::Size(),
 351                         scoped_ptr<gpu::MailboxHolder>(),
 352                         kNoTimestamp(),
 353                         true);
 354 }
 355
 356 // static
 357 scoped_refptr<VideoFrame> VideoFrame::CreateColorFrame(
 358     const gfx::Size& size,
 359     uint8 y, uint8 u, uint8 v,
 360     base::TimeDelta timestamp) {
 361   scoped_refptr<VideoFrame> frame = VideoFrame::CreateFrame(
 362       VideoFrame::YV12, size, gfx::Rect(size), size, timestamp);
 363   FillYUV(frame.get(), y, u, v);
 364   return frame;
 365 }
 366
 367 // static
 368 scoped_refptr<VideoFrame> VideoFrame::CreateBlackFrame(const gfx::Size& size) {
 369   const uint8 kBlackY = 0x00;
 370   const uint8 kBlackUV = 0x80;
 371   const base::TimeDelta kZero;
 372   return CreateColorFrame(size, kBlackY, kBlackUV, kBlackUV, kZero);
 373 }
 374
 375 // static
 376 scoped_refptr<VideoFrame> VideoFrame::CreateTransparentFrame(
 377     const gfx::Size& size) {
 378   const uint8 kBlackY = 0x00;
 379   const uint8 kBlackUV = 0x00;
 380   const uint8 kTransparentA = 0x00;
 381   const base::TimeDelta kZero;
 382   scoped_refptr<VideoFrame> frame = VideoFrame::CreateFrame(
 383       VideoFrame::YV12A, size, gfx::Rect(size), size, kZero);
 384   FillYUVA(frame, kBlackY, kBlackUV, kBlackUV, kTransparentA);
 385   return frame;
 386 }
 387
 388 #if defined(VIDEO_HOLE)
 389 // This block and other blocks wrapped around #if defined(VIDEO_HOLE) is not
 390 // maintained by the general compositor team. Please contact the following
 391 // people instead:
 392 //
 393 // wonsik@chromium.org
 394 // ycheo@chromium.org
 395
 396 // static
 397 scoped_refptr<VideoFrame> VideoFrame::CreateHoleFrame(
 398     const gfx::Size& size) {
 399   DCHECK(IsValidConfig(VideoFrame::HOLE, size, gfx::Rect(size), size));
 400   scoped_refptr<VideoFrame> frame(
 401       new VideoFrame(VideoFrame::HOLE,
 402                      size,
 403                      gfx::Rect(size),
 404                      size,
 405                      scoped_ptr<gpu::MailboxHolder>(),
 406                      base::TimeDelta(),
 407                      false));
 408   return frame;
 409 }
 410 #endif  // defined(VIDEO_HOLE)
 411
 412 // static
 413 size_t VideoFrame::NumPlanes(Format format) {
 414   switch (format) {
 415     case VideoFrame::NATIVE_TEXTURE:
 416 #if defined(VIDEO_HOLE)
 417     case VideoFrame::HOLE:
 418 #endif  // defined(VIDEO_HOLE)
 419       return 0;
 420     case VideoFrame::NV12:
 421       return 2;
 422     case VideoFrame::YV12:
 423     case VideoFrame::YV16:
 424     case VideoFrame::I420:
 425     case VideoFrame::YV12J:
 426     case VideoFrame::YV24:
 427       return 3;
 428     case VideoFrame::YV12A:
 429       return 4;
 430     case VideoFrame::UNKNOWN:
 431       break;
 432   }
 433   NOTREACHED() << "Unsupported video frame format: " << format;
 434   return 0;
 435 }
 436
 437
 438 // static
 439 size_t VideoFrame::AllocationSize(Format format, const gfx::Size& coded_size) {
 440   size_t total = 0;
 441   for (size_t i = 0; i < NumPlanes(format); ++i)
 442     total += PlaneAllocationSize(format, i, coded_size);
 443   return total;
 444 }
 445
 446 // static
 447 gfx::Size VideoFrame::PlaneSize(Format format,
 448                                 size_t plane,
 449                                 const gfx::Size& coded_size) {
 450   // Align to multiple-of-two size overall. This ensures that non-subsampled
 451   // planes can be addressed by pixel with the same scaling as the subsampled
 452   // planes.
 453   const int width = RoundUp(coded_size.width(), 2);
 454   const int height = RoundUp(coded_size.height(), 2);
 455   switch (format) {
 456     case VideoFrame::YV24:
 457       switch (plane) {
 458         case VideoFrame::kYPlane:
 459         case VideoFrame::kUPlane:
 460         case VideoFrame::kVPlane:
 461           return gfx::Size(width, height);
 462         default:
 463           break;
 464       }
 465       break;
 466     case VideoFrame::YV12:
 467     case VideoFrame::YV12J:
 468     case VideoFrame::I420:
 469       switch (plane) {
 470         case VideoFrame::kYPlane:
 471           return gfx::Size(width, height);
 472         case VideoFrame::kUPlane:
 473         case VideoFrame::kVPlane:
 474           return gfx::Size(width / 2, height / 2);
 475         default:
 476           break;
 477       }
 478       break;
 479     case VideoFrame::YV12A:
 480       switch (plane) {
 481         case VideoFrame::kYPlane:
 482         case VideoFrame::kAPlane:
 483           return gfx::Size(width, height);
 484         case VideoFrame::kUPlane:
 485         case VideoFrame::kVPlane:
 486           return gfx::Size(width / 2, height / 2);
 487         default:
 488           break;
 489       }
 490       break;
 491     case VideoFrame::YV16:
 492       switch (plane) {
 493         case VideoFrame::kYPlane:
 494           return gfx::Size(width, height);
 495         case VideoFrame::kUPlane:
 496         case VideoFrame::kVPlane:
 497           return gfx::Size(width / 2, height);
 498         default:
 499           break;
 500       }
 501       break;
 502     case VideoFrame::NV12:
 503       switch (plane) {
 504         case VideoFrame::kYPlane:
 505           return gfx::Size(width, height);
 506         case VideoFrame::kUVPlane:
 507           return gfx::Size(width, height / 2);
 508         default:
 509           break;
 510       }
 511       break;
 512     case VideoFrame::UNKNOWN:
 513     case VideoFrame::NATIVE_TEXTURE:
 514 #if defined(VIDEO_HOLE)
 515     case VideoFrame::HOLE:
 516 #endif  // defined(VIDEO_HOLE)
 517       break;
 518   }
 519   NOTREACHED() << "Unsupported video frame format/plane: "
 520                << format << "/" << plane;
 521   return gfx::Size();
 522 }
 523
 524 size_t VideoFrame::PlaneAllocationSize(Format format,
 525                                        size_t plane,
 526                                        const gfx::Size& coded_size) {
 527   // VideoFrame formats are (so far) all YUV and 1 byte per sample.
 528   return PlaneSize(format, plane, coded_size).GetArea();
 529 }
 530
 531 // static
 532 int VideoFrame::PlaneHorizontalBitsPerPixel(Format format, size_t plane) {
 533   switch (format) {
 534     case VideoFrame::YV24:
 535       switch (plane) {
 536         case kYPlane:
 537         case kUPlane:
 538         case kVPlane:
 539           return 8;
 540         default:
 541           break;
 542       }
 543       break;
 544     case VideoFrame::YV12:
 545     case VideoFrame::YV16:
 546     case VideoFrame::I420:
 547     case VideoFrame::YV12J:
 548       switch (plane) {
 549         case kYPlane:
 550           return 8;
 551         case kUPlane:
 552         case kVPlane:
 553           return 2;
 554         default:
 555           break;
 556       }
 557       break;
 558     case VideoFrame::YV12A:
 559       switch (plane) {
 560         case kYPlane:
 561         case kAPlane:
 562           return 8;
 563         case kUPlane:
 564         case kVPlane:
 565           return 2;
 566         default:
 567           break;
 568       }
 569       break;
 570     case VideoFrame::NV12:
 571       switch (plane) {
 572         case kYPlane:
 573           return 8;
 574         case kUVPlane:
 575           return 4;
 576         default:
 577           break;
 578       }
 579       break;
 580     case VideoFrame::UNKNOWN:
 581 #if defined(VIDEO_HOLE)
 582     case VideoFrame::HOLE:
 583 #endif  // defined(VIDEO_HOLE)
 584     case VideoFrame::NATIVE_TEXTURE:
 585       break;
 586   }
 587   NOTREACHED() << "Unsupported video frame format/plane: "
 588                << format << "/" << plane;
 589   return 0;
 590 }
 591
 592 // Release data allocated by AllocateYUV().
 593 static void ReleaseData(uint8* data) {
 594   DCHECK(data);
 595   base::AlignedFree(data);
 596 }
 597
 598 void VideoFrame::AllocateYUV() {
 599   DCHECK(format_ == VideoFrame::YV12 || format_ == VideoFrame::YV16 ||
 600          format_ == VideoFrame::YV12A || format_ == VideoFrame::I420 ||
 601          format_ == VideoFrame::YV12J || format_ == VideoFrame::YV24);
 602   // Align Y rows at least at 16 byte boundaries.  The stride for both
 603   // YV12 and YV16 is 1/2 of the stride of Y.  For YV12, every row of bytes for
 604   // U and V applies to two rows of Y (one byte of UV for 4 bytes of Y), so in
 605   // the case of YV12 the strides are identical for the same width surface, but
 606   // the number of bytes allocated for YV12 is 1/2 the amount for U & V as
 607   // YV16. We also round the height of the surface allocated to be an even
 608   // number to avoid any potential of faulting by code that attempts to access
 609   // the Y values of the final row, but assumes that the last row of U & V
 610   // applies to a full two rows of Y. YV12A is the same as YV12, but with an
 611   // additional alpha plane that has the same size and alignment as the Y plane.
 612   size_t y_stride = RoundUp(row_bytes(VideoFrame::kYPlane),
 613                             kFrameSizeAlignment);
 614   size_t uv_stride = RoundUp(row_bytes(VideoFrame::kUPlane),
 615                              kFrameSizeAlignment);
 616
 617   // The *2 here is because some formats (e.g. h264) allow interlaced coding,
 618   // and then the size needs to be a multiple of two macroblocks (vertically).
 619   // See libavcodec/utils.c:avcodec_align_dimensions2().
 620   size_t y_height = RoundUp(coded_size_.height(), kFrameSizeAlignment * 2);
 621   size_t uv_height =
 622       (format_ == VideoFrame::YV12 || format_ == VideoFrame::YV12A ||
 623        format_ == VideoFrame::I420)
 624           ? y_height / 2
 625           : y_height;
 626   size_t y_bytes = y_height * y_stride;
 627   size_t uv_bytes = uv_height * uv_stride;
 628   size_t a_bytes = format_ == VideoFrame::YV12A ? y_bytes : 0;
 629
 630   // The extra line of UV being allocated is because h264 chroma MC
 631   // overreads by one line in some cases, see libavcodec/utils.c:
 632   // avcodec_align_dimensions2() and libavcodec/x86/h264_chromamc.asm:
 633   // put_h264_chroma_mc4_ssse3().
 634   const size_t data_size =
 635       y_bytes + (uv_bytes * 2 + uv_stride) + a_bytes + kFrameSizePadding;
 636   uint8* data = reinterpret_cast<uint8*>(
 637       base::AlignedAlloc(data_size, kFrameAddressAlignment));
 638   // FFmpeg expects the initialize allocation to be zero-initialized.  Failure
 639   // to do so can lead to unitialized value usage.  See http://crbug.com/390941
 640   memset(data, 0, data_size);
 641   no_longer_needed_cb_ = base::Bind(&ReleaseData, data);
 642   COMPILE_ASSERT(0 == VideoFrame::kYPlane, y_plane_data_must_be_index_0);
 643   data_[VideoFrame::kYPlane] = data;
 644   data_[VideoFrame::kUPlane] = data + y_bytes;
 645   data_[VideoFrame::kVPlane] = data + y_bytes + uv_bytes;
 646   strides_[VideoFrame::kYPlane] = y_stride;
 647   strides_[VideoFrame::kUPlane] = uv_stride;
 648   strides_[VideoFrame::kVPlane] = uv_stride;
 649   if (format_ == YV12A) {
 650     data_[VideoFrame::kAPlane] = data + y_bytes + (2 * uv_bytes);
 651     strides_[VideoFrame::kAPlane] = y_stride;
 652   }
 653 }
 654
 655 VideoFrame::VideoFrame(VideoFrame::Format format,
 656                        const gfx::Size& coded_size,
 657                        const gfx::Rect& visible_rect,
 658                        const gfx::Size& natural_size,
 659                        scoped_ptr<gpu::MailboxHolder> mailbox_holder,
 660                        base::TimeDelta timestamp,
 661                        bool end_of_stream)
 662     : format_(format),
 663       coded_size_(coded_size),
 664       visible_rect_(visible_rect),
 665       natural_size_(natural_size),
 666       mailbox_holder_(mailbox_holder.Pass()),
 667       shared_memory_handle_(base::SharedMemory::NULLHandle()),
 668       timestamp_(timestamp),
 669       release_sync_point_(0),
 670       end_of_stream_(end_of_stream) {
 671   DCHECK(IsValidConfig(format_, coded_size_, visible_rect_, natural_size_));
 672
 673   memset(&strides_, 0, sizeof(strides_));
 674   memset(&data_, 0, sizeof(data_));
 675 }
 676
 677 VideoFrame::~VideoFrame() {
 678   if (!mailbox_holder_release_cb_.is_null()) {
 679     uint32 release_sync_point;
 680     {
 681       // To ensure that changes to |release_sync_point_| are visible on this
 682       // thread (imply a memory barrier).
 683       base::AutoLock locker(release_sync_point_lock_);
 684       release_sync_point = release_sync_point_;
 685     }
 686     base::ResetAndReturn(&mailbox_holder_release_cb_).Run(release_sync_point);
 687   }
 688   if (!no_longer_needed_cb_.is_null())
 689     base::ResetAndReturn(&no_longer_needed_cb_).Run();
 690 }
 691
 692 bool VideoFrame::IsValidPlane(size_t plane) const {
 693   return (plane < NumPlanes(format_));
 694 }
 695
 696 int VideoFrame::stride(size_t plane) const {
 697   DCHECK(IsValidPlane(plane));
 698   return strides_[plane];
 699 }
 700
 701 int VideoFrame::row_bytes(size_t plane) const {
 702   DCHECK(IsValidPlane(plane));
 703   int width = coded_size_.width();
 704   switch (format_) {
 705     case VideoFrame::YV24:
 706       switch (plane) {
 707         case kYPlane:
 708         case kUPlane:
 709         case kVPlane:
 710           return width;
 711         default:
 712           break;
 713       }
 714       break;
 715     case VideoFrame::YV12:
 716     case VideoFrame::YV16:
 717     case VideoFrame::I420:
 718     case VideoFrame::YV12J:
 719       switch (plane) {
 720         case kYPlane:
 721           return width;
 722         case kUPlane:
 723         case kVPlane:
 724           return RoundUp(width, 2) / 2;
 725         default:
 726           break;
 727       }
 728       break;
 729     case VideoFrame::YV12A:
 730       switch (plane) {
 731         case kYPlane:
 732         case kAPlane:
 733           return width;
 734         case kUPlane:
 735         case kVPlane:
 736           return RoundUp(width, 2) / 2;
 737         default:
 738           break;
 739       }
 740       break;
 741     case VideoFrame::NV12:
 742       switch (plane) {
 743         case kYPlane:
 744         case kUVPlane:
 745           return width;
 746         default:
 747           break;
 748       }
 749       break;
 750     case VideoFrame::UNKNOWN:
 751 #if defined(VIDEO_HOLE)
 752     case VideoFrame::HOLE:
 753 #endif  // defined(VIDEO_HOLE)
 754     case VideoFrame::NATIVE_TEXTURE:
 755       break;
 756   }
 757   NOTREACHED() << "Unsupported video frame format/plane: "
 758                << format_ << "/" << plane;
 759   return 0;
 760 }
 761
 762 int VideoFrame::rows(size_t plane) const {
 763   DCHECK(IsValidPlane(plane));
 764   int height = coded_size_.height();
 765   switch (format_) {
 766     case VideoFrame::YV24:
 767     case VideoFrame::YV16:
 768       switch (plane) {
 769         case kYPlane:
 770         case kUPlane:
 771         case kVPlane:
 772           return height;
 773         default:
 774           break;
 775       }
 776       break;
 777     case VideoFrame::YV12:
 778     case VideoFrame::YV12J:
 779     case VideoFrame::I420:
 780       switch (plane) {
 781         case kYPlane:
 782           return height;
 783         case kUPlane:
 784         case kVPlane:
 785           return RoundUp(height, 2) / 2;
 786         default:
 787           break;
 788       }
 789       break;
 790     case VideoFrame::YV12A:
 791       switch (plane) {
 792         case kYPlane:
 793         case kAPlane:
 794           return height;
 795         case kUPlane:
 796         case kVPlane:
 797           return RoundUp(height, 2) / 2;
 798         default:
 799           break;
 800       }
 801       break;
 802     case VideoFrame::NV12:
 803       switch (plane) {
 804         case kYPlane:
 805           return height;
 806         case kUVPlane:
 807           return RoundUp(height, 2) / 2;
 808         default:
 809           break;
 810       }
 811       break;
 812     case VideoFrame::UNKNOWN:
 813 #if defined(VIDEO_HOLE)
 814     case VideoFrame::HOLE:
 815 #endif  // defined(VIDEO_HOLE)
 816     case VideoFrame::NATIVE_TEXTURE:
 817       break;
 818   }
 819   NOTREACHED() << "Unsupported video frame format/plane: "
 820                << format_ << "/" << plane;
 821   return 0;
 822 }
 823
 824 uint8* VideoFrame::data(size_t plane) const {
 825   DCHECK(IsValidPlane(plane));
 826   return data_[plane];
 827 }
 828
 829 const gpu::MailboxHolder* VideoFrame::mailbox_holder() const {
 830   DCHECK_EQ(format_, NATIVE_TEXTURE);
 831   return mailbox_holder_.get();
 832 }
 833
 834 base::SharedMemoryHandle VideoFrame::shared_memory_handle() const {
 835   return shared_memory_handle_;
 836 }
 837
 838 void VideoFrame::UpdateReleaseSyncPoint(SyncPointClient* client) {
 839   DCHECK_EQ(format_, NATIVE_TEXTURE);
 840   base::AutoLock locker(release_sync_point_lock_);
 841   // Must wait on the previous sync point before inserting a new sync point so
 842   // that |mailbox_holder_release_cb_| guarantees the previous sync point
 843   // occurred when it waits on |release_sync_point_|.
 844   if (release_sync_point_)
 845     client->WaitSyncPoint(release_sync_point_);
 846   release_sync_point_ = client->InsertSyncPoint();
 847 }
 848
 849 #if defined(OS_POSIX)
 850 int VideoFrame::dmabuf_fd(size_t plane) const {
 851   return dmabuf_fds_[plane].get();
 852 }
 853 #endif
 854
 855 void VideoFrame::HashFrameForTesting(base::MD5Context* context) {
 856   for (int plane = 0; plane < kMaxPlanes; ++plane) {
 857     if (!IsValidPlane(plane))
 858       break;
 859     for (int row = 0; row < rows(plane); ++row) {
 860       base::MD5Update(context, base::StringPiece(
 861           reinterpret_cast<char*>(data(plane) + stride(plane) * row),
 862           row_bytes(plane)));
 863     }
 864   }
 865 }
 866
 867 }  // namespace media