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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/image_decoder/image_decoder.h"
#include <utility>
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "build/build_config.h"
#include "ipc/ipc_channel.h"
#include "services/data_decoder/public/cpp/data_decoder.h"
#include "services/data_decoder/public/cpp/decode_image.h"
#include "third_party/skia/include/core/SkBitmap.h"
namespace {
const int64_t kMaxImageSizeInBytes =
static_cast<int64_t>(IPC::Channel::kMaximumMessageSize);
// Note that this is always called on the thread which initiated the
// corresponding data_decoder::DecodeImage request.
void OnDecodeImageDone(
base::OnceCallback<void(int)> fail_callback,
base::OnceCallback<void(const SkBitmap&, int)> success_callback,
int request_id,
const SkBitmap& image) {
if (!image.isNull() && !image.empty())
std::move(success_callback).Run(image, request_id);
else
std::move(fail_callback).Run(request_id);
}
void RunDecodeCallbackOnTaskRunner(
data_decoder::DecodeImageCallback callback,
scoped_refptr<base::SequencedTaskRunner> task_runner,
const SkBitmap& image) {
task_runner->PostTask(FROM_HERE, base::BindOnce(std::move(callback), image));
}
template <typename ImageDataType>
void DecodeImage(ImageDataType image_data,
data_decoder::mojom::ImageCodec codec,
bool shrink_to_fit,
const gfx::Size& desired_image_frame_size,
data_decoder::DecodeImageCallback callback,
scoped_refptr<base::SequencedTaskRunner> callback_task_runner,
data_decoder::DataDecoder* data_decoder) {
base::span<const uint8_t> image_data_span(base::as_byte_span(image_data));
if (data_decoder) {
data_decoder::DecodeImage(
data_decoder, image_data_span, codec, shrink_to_fit,
kMaxImageSizeInBytes, desired_image_frame_size,
base::BindOnce(&RunDecodeCallbackOnTaskRunner, std::move(callback),
std::move(callback_task_runner)));
} else {
data_decoder::DecodeImageIsolated(
image_data_span, codec, shrink_to_fit, kMaxImageSizeInBytes,
desired_image_frame_size,
base::BindOnce(&RunDecodeCallbackOnTaskRunner, std::move(callback),
std::move(callback_task_runner)));
}
}
} // namespace
ImageDecoder::ImageRequest::ImageRequest()
: task_runner_(base::SingleThreadTaskRunner::GetCurrentDefault()) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
ImageDecoder::ImageRequest::ImageRequest(
const scoped_refptr<base::SequencedTaskRunner>& task_runner)
: task_runner_(task_runner) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
ImageDecoder::ImageRequest::ImageRequest(
data_decoder::DataDecoder* data_decoder)
: task_runner_(base::SingleThreadTaskRunner::GetCurrentDefault()),
data_decoder_(data_decoder) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
ImageDecoder::ImageRequest::~ImageRequest() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
ImageDecoder::Cancel(this);
}
// static
ImageDecoder* ImageDecoder::GetInstance() {
static base::NoDestructor<ImageDecoder> image_decoder;
return image_decoder.get();
}
// static
template <typename ImageDataType>
void ImageDecoder::Start(ImageRequest* image_request,
ImageDataType image_data) {
StartWithOptions(image_request, std::move(image_data));
}
template void ImageDecoder::Start(ImageRequest*, std::vector<uint8_t>);
template void ImageDecoder::Start(ImageRequest*, std::string);
// static
template <typename ImageDataType>
void ImageDecoder::StartWithOptions(ImageRequest* image_request,
ImageDataType image_data,
ImageCodec image_codec,
bool shrink_to_fit,
const gfx::Size& desired_image_frame_size) {
ImageDecoder::GetInstance()->StartWithOptionsImpl(
image_request, std::move(image_data), image_codec, shrink_to_fit,
desired_image_frame_size);
}
template void ImageDecoder::StartWithOptions(ImageRequest*,
std::vector<uint8_t>,
ImageCodec,
bool,
const gfx::Size&);
template void ImageDecoder::StartWithOptions(ImageRequest*,
std::string,
ImageCodec,
bool,
const gfx::Size&);
ImageDecoder::ImageDecoder() : image_request_id_counter_(0) {}
template <typename ImageDataType>
void ImageDecoder::StartWithOptionsImpl(
ImageRequest* image_request,
ImageDataType image_data,
ImageCodec image_codec,
bool shrink_to_fit,
const gfx::Size& desired_image_frame_size) {
DCHECK(image_request);
DCHECK(image_request->task_runner());
int request_id;
{
base::AutoLock lock(map_lock_);
request_id = image_request_id_counter_++;
image_request_id_map_.insert(std::make_pair(request_id, image_request));
}
data_decoder::mojom::ImageCodec codec =
data_decoder::mojom::ImageCodec::kDefault;
#if BUILDFLAG(IS_CHROMEOS)
if (image_codec == PNG_CODEC)
codec = data_decoder::mojom::ImageCodec::kPng;
#endif // BUILDFLAG(IS_CHROMEOS)
auto callback =
base::BindOnce(&OnDecodeImageDone,
base::BindOnce(&ImageDecoder::OnDecodeImageFailed,
base::Unretained(this)),
base::BindOnce(&ImageDecoder::OnDecodeImageSucceeded,
base::Unretained(this)),
request_id);
DecodeImage<ImageDataType>(std::move(image_data), codec, shrink_to_fit,
desired_image_frame_size, std::move(callback),
image_request->task_runner(),
image_request->data_decoder());
}
template void ImageDecoder::StartWithOptionsImpl(ImageRequest*,
std::vector<uint8_t>,
ImageCodec,
bool,
const gfx::Size&);
template void ImageDecoder::StartWithOptionsImpl(ImageRequest*,
std::string,
ImageCodec,
bool,
const gfx::Size&);
// static
void ImageDecoder::Cancel(ImageRequest* image_request) {
DCHECK(image_request);
ImageDecoder::GetInstance()->CancelImpl(image_request);
}
void ImageDecoder::CancelImpl(ImageRequest* image_request) {
base::AutoLock lock(map_lock_);
for (auto it = image_request_id_map_.begin();
it != image_request_id_map_.end();) {
if (it->second == image_request) {
image_request_id_map_.erase(it++);
} else {
++it;
}
}
}
void ImageDecoder::OnDecodeImageSucceeded(const SkBitmap& decoded_image,
int request_id) {
ImageRequest* image_request;
{
base::AutoLock lock(map_lock_);
auto it = image_request_id_map_.find(request_id);
if (it == image_request_id_map_.end())
return;
image_request = it->second;
image_request_id_map_.erase(it);
}
DCHECK(image_request->task_runner()->RunsTasksInCurrentSequence());
image_request->OnImageDecoded(decoded_image);
}
void ImageDecoder::OnDecodeImageFailed(int request_id) {
ImageRequest* image_request;
{
base::AutoLock lock(map_lock_);
auto it = image_request_id_map_.find(request_id);
if (it == image_request_id_map_.end())
return;
image_request = it->second;
image_request_id_map_.erase(it);
}
DCHECK(image_request->task_runner()->RunsTasksInCurrentSequence());
image_request->OnDecodeImageFailed();
}
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