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// Copyright 2019 The libgav1 Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/buffer_pool.h"
#include <cassert>
#include <cstring>
#include "src/utils/common.h"
#include "src/utils/constants.h"
#include "src/utils/logging.h"
namespace libgav1 {
namespace {
// Copies the feature_enabled, feature_data, segment_id_pre_skip, and
// last_active_segment_id fields of Segmentation.
void CopySegmentationParameters(const Segmentation& from, Segmentation* to) {
memcpy(to->feature_enabled, from.feature_enabled,
sizeof(to->feature_enabled));
memcpy(to->feature_data, from.feature_data, sizeof(to->feature_data));
to->segment_id_pre_skip = from.segment_id_pre_skip;
to->last_active_segment_id = from.last_active_segment_id;
}
} // namespace
RefCountedBuffer::RefCountedBuffer() = default;
RefCountedBuffer::~RefCountedBuffer() = default;
bool RefCountedBuffer::Realloc(int bitdepth, bool is_monochrome, int width,
int height, int subsampling_x, int subsampling_y,
int left_border, int right_border,
int top_border, int bottom_border) {
// The YuvBuffer::Realloc() could call the get frame buffer callback which
// will need to be thread safe. So we ensure that we only call Realloc() once
// at any given time.
std::lock_guard<std::mutex> lock(pool_->mutex_);
assert(!buffer_private_data_valid_);
if (!yuv_buffer_.Realloc(
bitdepth, is_monochrome, width, height, subsampling_x, subsampling_y,
left_border, right_border, top_border, bottom_border,
pool_->get_frame_buffer_, pool_->callback_private_data_,
&buffer_private_data_)) {
return false;
}
buffer_private_data_valid_ = true;
return true;
}
bool RefCountedBuffer::SetFrameDimensions(const ObuFrameHeader& frame_header) {
upscaled_width_ = frame_header.upscaled_width;
frame_width_ = frame_header.width;
frame_height_ = frame_header.height;
render_width_ = frame_header.render_width;
render_height_ = frame_header.render_height;
rows4x4_ = frame_header.rows4x4;
columns4x4_ = frame_header.columns4x4;
if (frame_header.refresh_frame_flags != 0 &&
!IsIntraFrame(frame_header.frame_type)) {
const int rows4x4_half = DivideBy2(rows4x4_);
const int columns4x4_half = DivideBy2(columns4x4_);
if (!reference_info_.Reset(rows4x4_half, columns4x4_half)) {
return false;
}
}
return segmentation_map_.Allocate(rows4x4_, columns4x4_);
}
void RefCountedBuffer::SetGlobalMotions(
const std::array<GlobalMotion, kNumReferenceFrameTypes>& global_motions) {
for (int ref = kReferenceFrameLast; ref <= kReferenceFrameAlternate; ++ref) {
static_assert(sizeof(global_motion_[ref].params) ==
sizeof(global_motions[ref].params),
"");
memcpy(global_motion_[ref].params, global_motions[ref].params,
sizeof(global_motion_[ref].params));
}
}
void RefCountedBuffer::SetFrameContext(const SymbolDecoderContext& context) {
frame_context_ = context;
frame_context_.ResetIntraFrameYModeCdf();
frame_context_.ResetCounters();
}
void RefCountedBuffer::GetSegmentationParameters(
Segmentation* segmentation) const {
CopySegmentationParameters(/*from=*/segmentation_, /*to=*/segmentation);
}
void RefCountedBuffer::SetSegmentationParameters(
const Segmentation& segmentation) {
CopySegmentationParameters(/*from=*/segmentation, /*to=*/&segmentation_);
}
void RefCountedBuffer::SetBufferPool(BufferPool* pool) { pool_ = pool; }
void RefCountedBuffer::ReturnToBufferPool(RefCountedBuffer* ptr) {
ptr->pool_->ReturnUnusedBuffer(ptr);
}
BufferPool::BufferPool(
FrameBufferSizeChangedCallback on_frame_buffer_size_changed,
GetFrameBufferCallback get_frame_buffer,
ReleaseFrameBufferCallback release_frame_buffer,
void* callback_private_data) {
if (get_frame_buffer != nullptr) {
// on_frame_buffer_size_changed may be null.
assert(release_frame_buffer != nullptr);
on_frame_buffer_size_changed_ = on_frame_buffer_size_changed;
get_frame_buffer_ = get_frame_buffer;
release_frame_buffer_ = release_frame_buffer;
callback_private_data_ = callback_private_data;
} else {
on_frame_buffer_size_changed_ = OnInternalFrameBufferSizeChanged;
get_frame_buffer_ = GetInternalFrameBuffer;
release_frame_buffer_ = ReleaseInternalFrameBuffer;
callback_private_data_ = &internal_frame_buffers_;
}
}
BufferPool::~BufferPool() {
for (const auto* buffer : buffers_) {
if (buffer->in_use_) {
assert(false && "RefCountedBuffer still in use at destruction time.");
LIBGAV1_DLOG(ERROR, "RefCountedBuffer still in use at destruction time.");
}
delete buffer;
}
}
bool BufferPool::OnFrameBufferSizeChanged(int bitdepth,
Libgav1ImageFormat image_format,
int width, int height,
int left_border, int right_border,
int top_border, int bottom_border) {
if (on_frame_buffer_size_changed_ == nullptr) return true;
return on_frame_buffer_size_changed_(callback_private_data_, bitdepth,
image_format, width, height, left_border,
right_border, top_border, bottom_border,
/*stride_alignment=*/16) == kStatusOk;
}
RefCountedBufferPtr BufferPool::GetFreeBuffer() {
std::unique_lock<std::mutex> lock(mutex_);
for (auto buffer : buffers_) {
if (!buffer->in_use_) {
buffer->in_use_ = true;
buffer->progress_row_ = -1;
buffer->frame_state_ = kFrameStateUnknown;
buffer->hdr_cll_set_ = false;
buffer->hdr_mdcv_set_ = false;
buffer->itut_t35_set_ = false;
lock.unlock();
return RefCountedBufferPtr(buffer, RefCountedBuffer::ReturnToBufferPool);
}
}
lock.unlock();
auto* const buffer = new (std::nothrow) RefCountedBuffer();
if (buffer == nullptr) {
LIBGAV1_DLOG(ERROR, "Failed to allocate a new reference counted buffer.");
return RefCountedBufferPtr();
}
buffer->SetBufferPool(this);
buffer->in_use_ = true;
buffer->progress_row_ = -1;
buffer->frame_state_ = kFrameStateUnknown;
lock.lock();
const bool ok = buffers_.push_back(buffer);
lock.unlock();
if (!ok) {
LIBGAV1_DLOG(
ERROR,
"Failed to push the new reference counted buffer into the vector.");
delete buffer;
return RefCountedBufferPtr();
}
return RefCountedBufferPtr(buffer, RefCountedBuffer::ReturnToBufferPool);
}
void BufferPool::Abort() {
std::unique_lock<std::mutex> lock(mutex_);
for (auto buffer : buffers_) {
if (buffer->in_use_) {
buffer->Abort();
}
}
}
void BufferPool::ReturnUnusedBuffer(RefCountedBuffer* buffer) {
std::lock_guard<std::mutex> lock(mutex_);
assert(buffer->in_use_);
buffer->in_use_ = false;
if (buffer->buffer_private_data_valid_) {
release_frame_buffer_(callback_private_data_, buffer->buffer_private_data_);
buffer->buffer_private_data_valid_ = false;
}
}
} // namespace libgav1
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