media/filters/vpx_video_decoder.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/filters/vpx_video_decoder.h"
   6
   7 #include <algorithm>
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/bind.h"
  12 #include "base/callback_helpers.h"
  13 #include "base/command_line.h"
  14 #include "base/location.h"
  15 #include "base/logging.h"
  16 #include "base/single_thread_task_runner.h"
  17 #include "base/stl_util.h"
  18 #include "base/strings/string_number_conversions.h"
  19 #include "base/sys_byteorder.h"
  20 #include "base/sys_info.h"
  21 #include "base/trace_event/memory_allocator_dump.h"
  22 #include "base/trace_event/memory_dump_manager.h"
  23 #include "base/trace_event/memory_dump_provider.h"
  24 #include "base/trace_event/process_memory_dump.h"
  25 #include "base/trace_event/trace_event.h"
  26 #include "media/base/bind_to_current_loop.h"
  27 #include "media/base/decoder_buffer.h"
  28 #include "media/base/limits.h"
  29 #include "media/base/media_switches.h"
  30 #include "media/base/pipeline.h"
  31 #include "media/base/video_util.h"
  32
  33 // Include libvpx header files.
  34 // VPX_CODEC_DISABLE_COMPAT excludes parts of the libvpx API that provide
  35 // backwards compatibility for legacy applications using the library.
  36 #define VPX_CODEC_DISABLE_COMPAT 1
  37 extern "C" {
  38 #include "third_party/libvpx/source/libvpx/vpx/vpx_decoder.h"
  39 #include "third_party/libvpx/source/libvpx/vpx/vpx_frame_buffer.h"
  40 #include "third_party/libvpx/source/libvpx/vpx/vp8dx.h"
  41 }
  42
  43 namespace media {
  44
  45 // Always try to use three threads for video decoding.  There is little reason
  46 // not to since current day CPUs tend to be multi-core and we measured
  47 // performance benefits on older machines such as P4s with hyperthreading.
  48 static const int kDecodeThreads = 2;
  49 static const int kMaxDecodeThreads = 16;
  50
  51 // Returns the number of threads.
  52 static int GetThreadCount(const VideoDecoderConfig& config) {
  53   // Refer to http://crbug.com/93932 for tsan suppressions on decoding.
  54   int decode_threads = kDecodeThreads;
  55
  56   const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
  57   std::string threads(cmd_line->GetSwitchValueASCII(switches::kVideoThreads));
  58   if (threads.empty() || !base::StringToInt(threads, &decode_threads)) {
  59     if (config.codec() == kCodecVP9) {
  60       // For VP9 decode when using the default thread count, increase the number
  61       // of decode threads to equal the maximum number of tiles possible for
  62       // higher resolution streams.
  63       if (config.coded_size().width() >= 2048)
  64         decode_threads = 8;
  65       else if (config.coded_size().width() >= 1024)
  66         decode_threads = 4;
  67     }
  68
  69     decode_threads = std::min(decode_threads,
  70                               base::SysInfo::NumberOfProcessors());
  71     return decode_threads;
  72   }
  73
  74   decode_threads = std::max(decode_threads, 0);
  75   decode_threads = std::min(decode_threads, kMaxDecodeThreads);
  76   return decode_threads;
  77 }
  78
  79 class VpxVideoDecoder::MemoryPool
  80     : public base::RefCountedThreadSafe<VpxVideoDecoder::MemoryPool>,
  81       public base::trace_event::MemoryDumpProvider {
  82  public:
  83   MemoryPool();
  84
  85   // Callback that will be called by libvpx when it needs a frame buffer.
  86   // Parameters:
  87   // |user_priv|  Private data passed to libvpx (pointer to memory pool).
  88   // |min_size|   Minimum size needed by libvpx to decompress the next frame.
  89   // |fb|         Pointer to the frame buffer to update.
  90   // Returns 0 on success. Returns < 0 on failure.
  91   static int32 GetVP9FrameBuffer(void* user_priv, size_t min_size,
  92                                  vpx_codec_frame_buffer* fb);
  93
  94   // Callback that will be called by libvpx when the frame buffer is no longer
  95   // being used by libvpx. Parameters:
  96   // |user_priv|  Private data passed to libvpx (pointer to memory pool).
  97   // |fb|         Pointer to the frame buffer that's being released.
  98   static int32 ReleaseVP9FrameBuffer(void *user_priv,
  99                                      vpx_codec_frame_buffer *fb);
 100
 101   // Generates a "no_longer_needed" closure that holds a reference
 102   // to this pool.
 103   base::Closure CreateFrameCallback(void* fb_priv_data);
 104
 105   bool OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd) override;
 106
 107  private:
 108   friend class base::RefCountedThreadSafe<VpxVideoDecoder::MemoryPool>;
 109   ~MemoryPool() override;
 110
 111   // Reference counted frame buffers used for VP9 decoding. Reference counting
 112   // is done manually because both chromium and libvpx has to release this
 113   // before a buffer can be re-used.
 114   struct VP9FrameBuffer {
 115     VP9FrameBuffer() : ref_cnt(0) {}
 116     std::vector<uint8> data;
 117     uint32 ref_cnt;
 118   };
 119
 120   // Gets the next available frame buffer for use by libvpx.
 121   VP9FrameBuffer* GetFreeFrameBuffer(size_t min_size);
 122
 123   // Method that gets called when a VideoFrame that references this pool gets
 124   // destroyed.
 125   void OnVideoFrameDestroyed(VP9FrameBuffer* frame_buffer);
 126
 127   // Frame buffers to be used by libvpx for VP9 Decoding.
 128   std::vector<VP9FrameBuffer*> frame_buffers_;
 129
 130   DISALLOW_COPY_AND_ASSIGN(MemoryPool);
 131 };
 132
 133 VpxVideoDecoder::MemoryPool::MemoryPool() {}
 134
 135 VpxVideoDecoder::MemoryPool::~MemoryPool() {
 136   STLDeleteElements(&frame_buffers_);
 137 }
 138
 139 VpxVideoDecoder::MemoryPool::VP9FrameBuffer*
 140     VpxVideoDecoder::MemoryPool::GetFreeFrameBuffer(size_t min_size) {
 141   // Check if a free frame buffer exists.
 142   size_t i = 0;
 143   for (; i < frame_buffers_.size(); ++i) {
 144     if (frame_buffers_[i]->ref_cnt == 0)
 145       break;
 146   }
 147
 148   if (i == frame_buffers_.size()) {
 149     // Create a new frame buffer.
 150     frame_buffers_.push_back(new VP9FrameBuffer());
 151   }
 152
 153   // Resize the frame buffer if necessary.
 154   if (frame_buffers_[i]->data.size() < min_size)
 155     frame_buffers_[i]->data.resize(min_size);
 156   return frame_buffers_[i];
 157 }
 158
 159 int32 VpxVideoDecoder::MemoryPool::GetVP9FrameBuffer(
 160     void* user_priv, size_t min_size, vpx_codec_frame_buffer* fb) {
 161   DCHECK(user_priv);
 162   DCHECK(fb);
 163
 164   VpxVideoDecoder::MemoryPool* memory_pool =
 165       static_cast<VpxVideoDecoder::MemoryPool*>(user_priv);
 166
 167   VP9FrameBuffer* fb_to_use = memory_pool->GetFreeFrameBuffer(min_size);
 168   if (fb_to_use == NULL)
 169     return -1;
 170
 171   fb->data = &fb_to_use->data[0];
 172   fb->size = fb_to_use->data.size();
 173   ++fb_to_use->ref_cnt;
 174
 175   // Set the frame buffer's private data to point at the external frame buffer.
 176   fb->priv = static_cast<void*>(fb_to_use);
 177   return 0;
 178 }
 179
 180 int32 VpxVideoDecoder::MemoryPool::ReleaseVP9FrameBuffer(
 181     void *user_priv, vpx_codec_frame_buffer *fb) {
 182   VP9FrameBuffer* frame_buffer = static_cast<VP9FrameBuffer*>(fb->priv);
 183   --frame_buffer->ref_cnt;
 184   return 0;
 185 }
 186
 187 base::Closure VpxVideoDecoder::MemoryPool::CreateFrameCallback(
 188     void* fb_priv_data) {
 189   VP9FrameBuffer* frame_buffer = static_cast<VP9FrameBuffer*>(fb_priv_data);
 190   ++frame_buffer->ref_cnt;
 191   return BindToCurrentLoop(
 192              base::Bind(&MemoryPool::OnVideoFrameDestroyed, this,
 193                         frame_buffer));
 194 }
 195
 196 bool VpxVideoDecoder::MemoryPool::OnMemoryDump(
 197     base::trace_event::ProcessMemoryDump* pmd) {
 198   base::trace_event::MemoryAllocatorDump* memory_dump =
 199       pmd->CreateAllocatorDump("media/vpx/memory_pool");
 200   base::trace_event::MemoryAllocatorDump* used_memory_dump =
 201       pmd->CreateAllocatorDump("media/vpx/memory_pool/used");
 202
 203   pmd->AddSuballocation(memory_dump->guid(),
 204                         base::trace_event::MemoryDumpManager::GetInstance()
 205                             ->system_allocator_pool_name());
 206   size_t bytes_used = 0;
 207   size_t bytes_reserved = 0;
 208   for (const VP9FrameBuffer* frame_buffer : frame_buffers_) {
 209     if (frame_buffer->ref_cnt) {
 210       bytes_used += frame_buffer->data.size();
 211     }
 212     bytes_reserved += frame_buffer->data.size();
 213   }
 214
 215   memory_dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
 216                          base::trace_event::MemoryAllocatorDump::kUnitsBytes,
 217                          bytes_reserved);
 218   used_memory_dump->AddScalar(
 219       base::trace_event::MemoryAllocatorDump::kNameSize,
 220       base::trace_event::MemoryAllocatorDump::kUnitsBytes, bytes_used);
 221
 222   return true;
 223 }
 224
 225 void VpxVideoDecoder::MemoryPool::OnVideoFrameDestroyed(
 226     VP9FrameBuffer* frame_buffer) {
 227   --frame_buffer->ref_cnt;
 228 }
 229
 230 VpxVideoDecoder::VpxVideoDecoder(
 231     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
 232     : task_runner_(task_runner),
 233       state_(kUninitialized),
 234       vpx_codec_(NULL),
 235       vpx_codec_alpha_(NULL) {}
 236
 237 VpxVideoDecoder::~VpxVideoDecoder() {
 238   DCHECK(task_runner_->BelongsToCurrentThread());
 239   CloseDecoder();
 240 }
 241
 242 std::string VpxVideoDecoder::GetDisplayName() const {
 243   return "VpxVideoDecoder";
 244 }
 245
 246 void VpxVideoDecoder::Initialize(const VideoDecoderConfig& config,
 247                                  bool low_delay,
 248                                  const InitCB& init_cb,
 249                                  const OutputCB& output_cb) {
 250   DCHECK(task_runner_->BelongsToCurrentThread());
 251   DCHECK(config.IsValidConfig());
 252   DCHECK(!config.is_encrypted());
 253   DCHECK(decode_cb_.is_null());
 254
 255   InitCB bound_init_cb = BindToCurrentLoop(init_cb);
 256
 257   if (!ConfigureDecoder(config)) {
 258     bound_init_cb.Run(false);
 259     return;
 260   }
 261
 262   // Success!
 263   config_ = config;
 264   state_ = kNormal;
 265   output_cb_ = BindToCurrentLoop(output_cb);
 266   bound_init_cb.Run(true);
 267 }
 268
 269 static vpx_codec_ctx* InitializeVpxContext(vpx_codec_ctx* context,
 270                                            const VideoDecoderConfig& config) {
 271   context = new vpx_codec_ctx();
 272   vpx_codec_dec_cfg_t vpx_config = {0};
 273   vpx_config.w = config.coded_size().width();
 274   vpx_config.h = config.coded_size().height();
 275   vpx_config.threads = GetThreadCount(config);
 276
 277   vpx_codec_err_t status = vpx_codec_dec_init(context,
 278                                               config.codec() == kCodecVP9 ?
 279                                                   vpx_codec_vp9_dx() :
 280                                                   vpx_codec_vp8_dx(),
 281                                               &vpx_config,
 282                                               0);
 283   if (status != VPX_CODEC_OK) {
 284     LOG(ERROR) << "vpx_codec_dec_init failed, status=" << status;
 285     delete context;
 286     return NULL;
 287   }
 288   return context;
 289 }
 290
 291 bool VpxVideoDecoder::ConfigureDecoder(const VideoDecoderConfig& config) {
 292   if (config.codec() != kCodecVP8 && config.codec() != kCodecVP9)
 293     return false;
 294
 295   // In VP8 videos, only those with alpha are handled by VpxVideoDecoder. All
 296   // other VP8 videos go to FFmpegVideoDecoder.
 297   if (config.codec() == kCodecVP8 && config.format() != PIXEL_FORMAT_YV12A)
 298     return false;
 299
 300   CloseDecoder();
 301
 302   vpx_codec_ = InitializeVpxContext(vpx_codec_, config);
 303   if (!vpx_codec_)
 304     return false;
 305
 306   // We use our own buffers for VP9 so that there is no need to copy data after
 307   // decoding.
 308   if (config.codec() == kCodecVP9) {
 309     memory_pool_ = new MemoryPool();
 310     base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
 311         memory_pool_.get(), task_runner_);
 312     if (vpx_codec_set_frame_buffer_functions(vpx_codec_,
 313                                              &MemoryPool::GetVP9FrameBuffer,
 314                                              &MemoryPool::ReleaseVP9FrameBuffer,
 315                                              memory_pool_.get())) {
 316       LOG(ERROR) << "Failed to configure external buffers.";
 317       return false;
 318     }
 319   }
 320
 321   if (config.format() == PIXEL_FORMAT_YV12A) {
 322     vpx_codec_alpha_ = InitializeVpxContext(vpx_codec_alpha_, config);
 323     if (!vpx_codec_alpha_)
 324       return false;
 325   }
 326
 327   return true;
 328 }
 329
 330 void VpxVideoDecoder::CloseDecoder() {
 331   if (vpx_codec_) {
 332     vpx_codec_destroy(vpx_codec_);
 333     delete vpx_codec_;
 334     vpx_codec_ = NULL;
 335     base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
 336         memory_pool_.get());
 337     memory_pool_ = NULL;
 338   }
 339   if (vpx_codec_alpha_) {
 340     vpx_codec_destroy(vpx_codec_alpha_);
 341     delete vpx_codec_alpha_;
 342     vpx_codec_alpha_ = NULL;
 343   }
 344 }
 345
 346 void VpxVideoDecoder::Decode(const scoped_refptr<DecoderBuffer>& buffer,
 347                              const DecodeCB& decode_cb) {
 348   DCHECK(task_runner_->BelongsToCurrentThread());
 349   DCHECK(!decode_cb.is_null());
 350   CHECK_NE(state_, kUninitialized);
 351   CHECK(decode_cb_.is_null()) << "Overlapping decodes are not supported.";
 352
 353   decode_cb_ = BindToCurrentLoop(decode_cb);
 354
 355   if (state_ == kError) {
 356     base::ResetAndReturn(&decode_cb_).Run(kDecodeError);
 357     return;
 358   }
 359
 360   // Return empty frames if decoding has finished.
 361   if (state_ == kDecodeFinished) {
 362     base::ResetAndReturn(&decode_cb_).Run(kOk);
 363     return;
 364   }
 365
 366   DecodeBuffer(buffer);
 367 }
 368
 369 void VpxVideoDecoder::Reset(const base::Closure& closure) {
 370   DCHECK(task_runner_->BelongsToCurrentThread());
 371   DCHECK(decode_cb_.is_null());
 372
 373   state_ = kNormal;
 374   task_runner_->PostTask(FROM_HERE, closure);
 375 }
 376
 377 void VpxVideoDecoder::DecodeBuffer(const scoped_refptr<DecoderBuffer>& buffer) {
 378   DCHECK(task_runner_->BelongsToCurrentThread());
 379   DCHECK_NE(state_, kUninitialized);
 380   DCHECK_NE(state_, kDecodeFinished);
 381   DCHECK_NE(state_, kError);
 382   DCHECK(!decode_cb_.is_null());
 383   DCHECK(buffer.get());
 384
 385   // Transition to kDecodeFinished on the first end of stream buffer.
 386   if (state_ == kNormal && buffer->end_of_stream()) {
 387     state_ = kDecodeFinished;
 388     base::ResetAndReturn(&decode_cb_).Run(kOk);
 389     return;
 390   }
 391
 392   scoped_refptr<VideoFrame> video_frame;
 393   if (!VpxDecode(buffer, &video_frame)) {
 394     state_ = kError;
 395     base::ResetAndReturn(&decode_cb_).Run(kDecodeError);
 396     return;
 397   }
 398
 399   if (video_frame.get())
 400     output_cb_.Run(video_frame);
 401
 402   // VideoDecoderShim expects that |decode_cb| is called only after
 403   // |output_cb_|.
 404   base::ResetAndReturn(&decode_cb_).Run(kOk);
 405 }
 406
 407 bool VpxVideoDecoder::VpxDecode(const scoped_refptr<DecoderBuffer>& buffer,
 408                                 scoped_refptr<VideoFrame>* video_frame) {
 409   DCHECK(video_frame);
 410   DCHECK(!buffer->end_of_stream());
 411
 412   // Pass |buffer| to libvpx.
 413   int64 timestamp = buffer->timestamp().InMicroseconds();
 414   void* user_priv = reinterpret_cast<void*>(&timestamp);
 415
 416   {
 417     TRACE_EVENT1("video", "vpx_codec_decode", "timestamp", timestamp);
 418     vpx_codec_err_t status = vpx_codec_decode(vpx_codec_,
 419                                               buffer->data(),
 420                                               buffer->data_size(),
 421                                               user_priv,
 422                                               0);
 423     if (status != VPX_CODEC_OK) {
 424       LOG(ERROR) << "vpx_codec_decode() failed, status=" << status;
 425       return false;
 426     }
 427   }
 428
 429   // Gets pointer to decoded data.
 430   vpx_codec_iter_t iter = NULL;
 431   const vpx_image_t* vpx_image = vpx_codec_get_frame(vpx_codec_, &iter);
 432   if (!vpx_image) {
 433     *video_frame = NULL;
 434     return true;
 435   }
 436
 437   if (vpx_image->user_priv != reinterpret_cast<void*>(&timestamp)) {
 438     LOG(ERROR) << "Invalid output timestamp.";
 439     return false;
 440   }
 441
 442   const vpx_image_t* vpx_image_alpha = NULL;
 443   if (vpx_codec_alpha_ && buffer->side_data_size() >= 8) {
 444     // Pass alpha data to libvpx.
 445     int64 timestamp_alpha = buffer->timestamp().InMicroseconds();
 446     void* user_priv_alpha = reinterpret_cast<void*>(&timestamp_alpha);
 447
 448     // First 8 bytes of side data is side_data_id in big endian.
 449     const uint64 side_data_id = base::NetToHost64(
 450         *(reinterpret_cast<const uint64*>(buffer->side_data())));
 451     if (side_data_id == 1) {
 452       {
 453         TRACE_EVENT1("video", "vpx_codec_decode_alpha",
 454                      "timestamp_alpha", timestamp_alpha);
 455         vpx_codec_err_t status = vpx_codec_decode(vpx_codec_alpha_,
 456                                                   buffer->side_data() + 8,
 457                                                   buffer->side_data_size() - 8,
 458                                                   user_priv_alpha,
 459                                                   0);
 460         if (status != VPX_CODEC_OK) {
 461           LOG(ERROR) << "vpx_codec_decode() failed on alpha, status=" << status;
 462           return false;
 463         }
 464       }
 465
 466       // Gets pointer to decoded data.
 467       vpx_codec_iter_t iter_alpha = NULL;
 468       vpx_image_alpha = vpx_codec_get_frame(vpx_codec_alpha_, &iter_alpha);
 469       if (!vpx_image_alpha) {
 470         *video_frame = NULL;
 471         return true;
 472       }
 473
 474       if (vpx_image_alpha->user_priv !=
 475           reinterpret_cast<void*>(&timestamp_alpha)) {
 476         LOG(ERROR) << "Invalid output timestamp on alpha.";
 477         return false;
 478       }
 479
 480       if (vpx_image_alpha->d_h != vpx_image->d_h ||
 481           vpx_image_alpha->d_w != vpx_image->d_w) {
 482         LOG(ERROR) << "The alpha plane dimensions are not the same as the "
 483                       "image dimensions.";
 484         return false;
 485       }
 486     }
 487   }
 488
 489   CopyVpxImageTo(vpx_image, vpx_image_alpha, video_frame);
 490   (*video_frame)->set_timestamp(base::TimeDelta::FromMicroseconds(timestamp));
 491   return true;
 492 }
 493
 494 void VpxVideoDecoder::CopyVpxImageTo(const vpx_image* vpx_image,
 495                                      const struct vpx_image* vpx_image_alpha,
 496                                      scoped_refptr<VideoFrame>* video_frame) {
 497   CHECK(vpx_image);
 498   CHECK(vpx_image->fmt == VPX_IMG_FMT_I420 ||
 499         vpx_image->fmt == VPX_IMG_FMT_YV12 ||
 500         vpx_image->fmt == VPX_IMG_FMT_I444);
 501
 502   VideoPixelFormat codec_format = PIXEL_FORMAT_YV12;
 503   int uv_rows = (vpx_image->d_h + 1) / 2;
 504
 505   if (vpx_image->fmt == VPX_IMG_FMT_I444) {
 506     CHECK(!vpx_codec_alpha_);
 507     codec_format = PIXEL_FORMAT_YV24;
 508     uv_rows = vpx_image->d_h;
 509   } else if (vpx_codec_alpha_) {
 510     codec_format = PIXEL_FORMAT_YV12A;
 511   }
 512
 513   // Default to the color space from the config, but if the bistream specifies
 514   // one, prefer that instead.
 515   ColorSpace color_space = config_.color_space();
 516   if (vpx_image->cs == VPX_CS_BT_709)
 517     color_space = COLOR_SPACE_HD_REC709;
 518   else if (vpx_image->cs == VPX_CS_BT_601)
 519     color_space = COLOR_SPACE_SD_REC601;
 520
 521   // The mixed |w|/|d_h| in |coded_size| is intentional. Setting the correct
 522   // coded width is necessary to allow coalesced memory access, which may avoid
 523   // frame copies. Setting the correct coded height however does not have any
 524   // benefit, and only risk copying too much data.
 525   const gfx::Size coded_size(vpx_image->w, vpx_image->d_h);
 526   const gfx::Size visible_size(vpx_image->d_w, vpx_image->d_h);
 527
 528   if (!vpx_codec_alpha_ && memory_pool_.get()) {
 529     *video_frame = VideoFrame::WrapExternalYuvData(
 530         codec_format,
 531         coded_size, gfx::Rect(visible_size), config_.natural_size(),
 532         vpx_image->stride[VPX_PLANE_Y],
 533         vpx_image->stride[VPX_PLANE_U],
 534         vpx_image->stride[VPX_PLANE_V],
 535         vpx_image->planes[VPX_PLANE_Y],
 536         vpx_image->planes[VPX_PLANE_U],
 537         vpx_image->planes[VPX_PLANE_V],
 538         kNoTimestamp());
 539     video_frame->get()->AddDestructionObserver(
 540         memory_pool_->CreateFrameCallback(vpx_image->fb_priv));
 541     video_frame->get()->metadata()->SetInteger(VideoFrameMetadata::COLOR_SPACE,
 542                                                color_space);
 543     return;
 544   }
 545
 546   *video_frame = frame_pool_.CreateFrame(
 547       codec_format,
 548       visible_size,
 549       gfx::Rect(visible_size),
 550       config_.natural_size(),
 551       kNoTimestamp());
 552   video_frame->get()->metadata()->SetInteger(VideoFrameMetadata::COLOR_SPACE,
 553                                              color_space);
 554
 555   CopyYPlane(vpx_image->planes[VPX_PLANE_Y],
 556              vpx_image->stride[VPX_PLANE_Y],
 557              vpx_image->d_h,
 558              video_frame->get());
 559   CopyUPlane(vpx_image->planes[VPX_PLANE_U],
 560              vpx_image->stride[VPX_PLANE_U],
 561              uv_rows,
 562              video_frame->get());
 563   CopyVPlane(vpx_image->planes[VPX_PLANE_V],
 564              vpx_image->stride[VPX_PLANE_V],
 565              uv_rows,
 566              video_frame->get());
 567   if (!vpx_codec_alpha_)
 568     return;
 569   if (!vpx_image_alpha) {
 570     MakeOpaqueAPlane(
 571         vpx_image->stride[VPX_PLANE_Y], vpx_image->d_h, video_frame->get());
 572     return;
 573   }
 574   CopyAPlane(vpx_image_alpha->planes[VPX_PLANE_Y],
 575              vpx_image_alpha->stride[VPX_PLANE_Y],
 576              vpx_image_alpha->d_h,
 577              video_frame->get());
 578 }
 579
 580 }  // namespace media