Add accelerated video decoder interface, VP8 and H.264 implementations and hook up to V4L2SVDA.

content/common/gpu/media/h264_dpb.cc

 // Copyright (c) 2012 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 <algorithm>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "content/common/gpu/media/h264_dpb.h"
 
 namespace content {
 
+H264PictureBase::H264PictureBase() {
+  memset(this, 0, sizeof(*this));
+}
+
 H264DPB::H264DPB() : max_num_pics_(0) {}
 H264DPB::~H264DPB() {}
 
 void H264DPB::Clear() {
   pics_.clear();
 }
 
 void H264DPB::set_max_num_pics(size_t max_num_pics) {
   DCHECK_LE(max_num_pics, kDPBMaxSize);
   max_num_pics_ = max_num_pics;
   if (pics_.size() > max_num_pics_)
     pics_.resize(max_num_pics_);
 }
 
+void H264DPB::UpdatePicPositions() {
+  size_t i = 0;
+  for (auto& pic : pics_) {
+    pic->dpb_position = i;
+    ++i;
+  }
+}
+
 void H264DPB::DeleteByPOC(int poc) {
-  for (Pictures::iterator it = pics_.begin(); it != pics_.end(); ++it) {
+  for (H264Picture::Vector::iterator it = pics_.begin();
+       it != pics_.end(); ++it) {
     if ((*it)->pic_order_cnt == poc) {
       pics_.erase(it);
+      UpdatePicPositions();
       return;
     }
   }
   NOTREACHED() << "Missing POC: " << poc;
 }
 
 void H264DPB::DeleteUnused() {
-  for (Pictures::iterator it = pics_.begin(); it != pics_.end(); ) {
+  for (H264Picture::Vector::iterator it = pics_.begin(); it != pics_.end(); ) {
     if ((*it)->outputted && !(*it)->ref)
       it = pics_.erase(it);
     else
       ++it;
   }
+  UpdatePicPositions();
 }
 
-void H264DPB::StorePic(H264Picture* pic) {
+void H264DPB::StorePic(const scoped_refptr<H264Picture>& pic) {
   DCHECK_LT(pics_.size(), max_num_pics_);
   DVLOG(3) << "Adding PicNum: " << pic->pic_num << " ref: " << (int)pic->ref
            << " longterm: " << (int)pic->long_term << " to DPB";
+  pic->dpb_position = pics_.size();
   pics_.push_back(pic);
 }
 
 int H264DPB::CountRefPics() {
   int ret = 0;
   for (size_t i = 0; i < pics_.size(); ++i) {
     if (pics_[i]->ref)
       ++ret;
   }
   return ret;
 }
 
 void H264DPB::MarkAllUnusedForRef() {
   for (size_t i = 0; i < pics_.size(); ++i)
     pics_[i]->ref = false;
 }
 
-H264Picture* H264DPB::GetShortRefPicByPicNum(int pic_num) {
-  for (size_t i = 0; i < pics_.size(); ++i) {
-    H264Picture* pic = pics_[i];
+scoped_refptr<H264Picture> H264DPB::GetShortRefPicByPicNum(int pic_num) {
+  for (const auto& pic : pics_) {
     if (pic->ref && !pic->long_term && pic->pic_num == pic_num)
       return pic;
   }
 
   DVLOG(1) << "Missing short ref pic num: " << pic_num;
-  return NULL;
+  return nullptr;
 }
 
-H264Picture* H264DPB::GetLongRefPicByLongTermPicNum(int pic_num) {
-  for (size_t i = 0; i < pics_.size(); ++i) {
-    H264Picture* pic = pics_[i];
+scoped_refptr<H264Picture> H264DPB::GetLongRefPicByLongTermPicNum(int pic_num) {
+  for (const auto& pic : pics_) {
     if (pic->ref && pic->long_term && pic->long_term_pic_num == pic_num)
       return pic;
   }
 
   DVLOG(1) << "Missing long term pic num: " << pic_num;
-  return NULL;
+  return nullptr;
 }
 
-H264Picture* H264DPB::GetLowestFrameNumWrapShortRefPic() {
-  H264Picture* ret = NULL;
-  for (size_t i = 0; i < pics_.size(); ++i) {
-    H264Picture* pic = pics_[i];
+scoped_refptr<H264Picture> H264DPB::GetLowestFrameNumWrapShortRefPic() {
+  scoped_refptr<H264Picture> ret;
+  for (const auto& pic : pics_) {
     if (pic->ref && !pic->long_term &&
         (!ret || pic->frame_num_wrap < ret->frame_num_wrap))
       ret = pic;
   }
   return ret;
 }
 
-void H264DPB::GetNotOutputtedPicsAppending(H264Picture::PtrVector& out) {
-  for (size_t i = 0; i < pics_.size(); ++i) {
-    H264Picture* pic = pics_[i];
+void H264DPB::GetNotOutputtedPicsAppending(H264Picture::Vector* out) {
+  for (const auto& pic : pics_) {
     if (!pic->outputted)
-      out.push_back(pic);
+      out->push_back(pic);
   }
 }
 
-void H264DPB::GetShortTermRefPicsAppending(H264Picture::PtrVector& out) {
-  for (size_t i = 0; i < pics_.size(); ++i) {
-    H264Picture* pic = pics_[i];
+void H264DPB::GetShortTermRefPicsAppending(H264Picture::Vector* out) {
+  for (const auto& pic : pics_) {
     if (pic->ref && !pic->long_term)
-      out.push_back(pic);
+      out->push_back(pic);
   }
 }
 
-void H264DPB::GetLongTermRefPicsAppending(H264Picture::PtrVector& out) {
-  for (size_t i = 0; i < pics_.size(); ++i) {
-    H264Picture* pic = pics_[i];
+void H264DPB::GetLongTermRefPicsAppending(H264Picture::Vector* out) {
+  for (const auto& pic : pics_) {
     if (pic->ref && pic->long_term)
-      out.push_back(pic);
+      out->push_back(pic);
   }
 }
 
 }  // namespace content