Migrate content/common/gpu/media code to media/gpu

content/common/gpu/media/vp8_decoder.cc

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/common/gpu/media/vp8_decoder.h"
-#include "media/base/limits.h"
-
-namespace content {
-
-VP8Decoder::VP8Accelerator::VP8Accelerator() {
-}
-
-VP8Decoder::VP8Accelerator::~VP8Accelerator() {
-}
-
-VP8Decoder::VP8Decoder(VP8Accelerator* accelerator)
-    : state_(kNeedStreamMetadata),
-      curr_frame_start_(nullptr),
-      frame_size_(0),
-      accelerator_(accelerator) {
-  DCHECK(accelerator_);
-}
-
-VP8Decoder::~VP8Decoder() {
-}
-
-bool VP8Decoder::Flush() {
-  DVLOG(2) << "Decoder flush";
-  Reset();
-  return true;
-}
-
-void VP8Decoder::SetStream(const uint8_t* ptr, size_t size) {
-  DCHECK(ptr);
-  DCHECK(size);
-
-  curr_frame_start_ = ptr;
-  frame_size_ = size;
-  DVLOG(4) << "New input stream at: " << (void*)ptr << " size: " << size;
-}
-
-void VP8Decoder::Reset() {
-  curr_pic_ = nullptr;
-  curr_frame_hdr_ = nullptr;
-  curr_frame_start_ = nullptr;
-  frame_size_ = 0;
-
-  last_frame_ = nullptr;
-  golden_frame_ = nullptr;
-  alt_frame_ = nullptr;
-
-  if (state_ == kDecoding)
-    state_ = kAfterReset;
-}
-
-VP8Decoder::DecodeResult VP8Decoder::Decode() {
-  if (!curr_frame_start_ || frame_size_ == 0)
-    return kRanOutOfStreamData;
-
-  if (!curr_frame_hdr_) {
-    curr_frame_hdr_.reset(new media::Vp8FrameHeader());
-    if (!parser_.ParseFrame(curr_frame_start_, frame_size_,
-                            curr_frame_hdr_.get())) {
-      DVLOG(1) << "Error during decode";
-      state_ = kError;
-      return kDecodeError;
-    }
-  }
-
-  if (curr_frame_hdr_->IsKeyframe()) {
-    gfx::Size new_pic_size(curr_frame_hdr_->width, curr_frame_hdr_->height);
-    if (new_pic_size.IsEmpty())
-      return kDecodeError;
-
-    if (new_pic_size != pic_size_) {
-      DVLOG(2) << "New resolution: " << new_pic_size.ToString();
-      pic_size_ = new_pic_size;
-
-      DCHECK(!curr_pic_);
-      last_frame_ = nullptr;
-      golden_frame_ = nullptr;
-      alt_frame_ = nullptr;
-
-      return kAllocateNewSurfaces;
-    }
-
-    state_ = kDecoding;
-  } else {
-    if (state_ != kDecoding) {
-      // Need a resume point.
-      curr_frame_hdr_.reset();
-      return kRanOutOfStreamData;
-    }
-  }
-
-  curr_pic_ = accelerator_->CreateVP8Picture();
-  if (!curr_pic_)
-    return kRanOutOfSurfaces;
-
-  if (!DecodeAndOutputCurrentFrame())
-    return kDecodeError;
-
-  return kRanOutOfStreamData;
-}
-
-void VP8Decoder::RefreshReferenceFrames() {
-  if (curr_frame_hdr_->IsKeyframe()) {
-    last_frame_ = curr_pic_;
-    golden_frame_ = curr_pic_;
-    alt_frame_ = curr_pic_;
-    return;
-  }
-
-  // Save current golden since we overwrite it here,
-  // but may have to use it to update alt below.
-  scoped_refptr<VP8Picture> curr_golden = golden_frame_;
-
-  if (curr_frame_hdr_->refresh_golden_frame) {
-    golden_frame_ = curr_pic_;
-  } else {
-    switch (curr_frame_hdr_->copy_buffer_to_golden) {
-      case media::Vp8FrameHeader::COPY_LAST_TO_GOLDEN:
-        DCHECK(last_frame_);
-        golden_frame_ = last_frame_;
-        break;
-
-      case media::Vp8FrameHeader::COPY_ALT_TO_GOLDEN:
-        DCHECK(alt_frame_);
-        golden_frame_ = alt_frame_;
-        break;
-    }
-  }
-
-  if (curr_frame_hdr_->refresh_alternate_frame) {
-    alt_frame_ = curr_pic_;
-  } else {
-    switch (curr_frame_hdr_->copy_buffer_to_alternate) {
-      case media::Vp8FrameHeader::COPY_LAST_TO_ALT:
-        DCHECK(last_frame_);
-        alt_frame_ = last_frame_;
-        break;
-
-      case media::Vp8FrameHeader::COPY_GOLDEN_TO_ALT:
-        DCHECK(curr_golden);
-        alt_frame_ = curr_golden;
-        break;
-    }
-  }
-
-  if (curr_frame_hdr_->refresh_last)
-    last_frame_ = curr_pic_;
-}
-
-bool VP8Decoder::DecodeAndOutputCurrentFrame() {
-  DCHECK(!pic_size_.IsEmpty());
-  DCHECK(curr_pic_);
-  DCHECK(curr_frame_hdr_);
-
-  if (curr_frame_hdr_->IsKeyframe()) {
-    horizontal_scale_ = curr_frame_hdr_->horizontal_scale;
-    vertical_scale_ = curr_frame_hdr_->vertical_scale;
-  } else {
-    // Populate fields from decoder state instead.
-    curr_frame_hdr_->width = pic_size_.width();
-    curr_frame_hdr_->height = pic_size_.height();
-    curr_frame_hdr_->horizontal_scale = horizontal_scale_;
-    curr_frame_hdr_->vertical_scale = vertical_scale_;
-  }
-
-  if (!accelerator_->SubmitDecode(curr_pic_, curr_frame_hdr_.get(), last_frame_,
-                                  golden_frame_, alt_frame_))
-    return false;
-
-  if (curr_frame_hdr_->show_frame)
-    if (!accelerator_->OutputPicture(curr_pic_))
-      return false;
-
-  RefreshReferenceFrames();
-
-  curr_pic_ = nullptr;
-  curr_frame_hdr_ = nullptr;
-  curr_frame_start_ = nullptr;
-  frame_size_ = 0;
-  return true;
-}
-
-gfx::Size VP8Decoder::GetPicSize() const {
-  return pic_size_;
-}
-
-size_t VP8Decoder::GetRequiredNumOfPictures() const {
-  const size_t kVP8NumFramesActive = 4;
-  const size_t kPicsInPipeline = media::limits::kMaxVideoFrames + 2;
-  return kVP8NumFramesActive + kPicsInPipeline;
-}
-
-}  // namespace content