// Copyright 2019 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 "media/gpu/chromeos/image_processor_backend.h"

#include <memory>
#include <ostream>
#include <sstream>

#include "base/bind.h"
#include "base/strings/stringprintf.h"
#include "base/task/post_task.h"
#include "base/task/task_traits.h"
#include "media/gpu/macros.h"

namespace media {

namespace {

template <class T>
std::string VectorToString(const std::vector<T>& vec) {
  std::ostringstream result;
  std::string delim;
  result << "[";
  for (const T& v : vec) {
    result << delim << v;
    if (delim.size() == 0)
      delim = ", ";
  }
  result << "]";
  return result.str();
}

}  // namespace

ImageProcessorBackend::PortConfig::PortConfig(const PortConfig&) = default;

ImageProcessorBackend::PortConfig::PortConfig(
    Fourcc fourcc,
    const gfx::Size& size,
    const std::vector<ColorPlaneLayout>& planes,
    const gfx::Rect& visible_rect,
    const std::vector<VideoFrame::StorageType>& preferred_storage_types)
    : fourcc(fourcc),
      size(size),
      planes(planes),
      visible_rect(visible_rect),
      preferred_storage_types(preferred_storage_types) {}

ImageProcessorBackend::PortConfig::~PortConfig() = default;

std::string ImageProcessorBackend::PortConfig::ToString() const {
  return base::StringPrintf(
      "PortConfig(format:%s, size:%s, planes: %s, visible_rect:%s, "
      "storage_types:%s)",
      fourcc.ToString().c_str(), size.ToString().c_str(),
      VectorToString(planes).c_str(), visible_rect.ToString().c_str(),
      VectorToString(preferred_storage_types).c_str());
}

ImageProcessorBackend::ImageProcessorBackend(
    const PortConfig& input_config,
    const PortConfig& output_config,
    OutputMode output_mode,
    VideoRotation relative_rotation,
    ErrorCB error_cb,
    scoped_refptr<base::SequencedTaskRunner> backend_task_runner)
    : input_config_(input_config),
      output_config_(output_config),
      output_mode_(output_mode),
      relative_rotation_(relative_rotation),
      error_cb_(error_cb),
      backend_task_runner_(std::move(backend_task_runner)) {
  DETACH_FROM_SEQUENCE(backend_sequence_checker_);
}

ImageProcessorBackend::~ImageProcessorBackend() = default;

void ImageProcessorBackend::Destroy() {
  DCHECK_CALLED_ON_VALID_SEQUENCE(backend_sequence_checker_);

  delete this;
}

void ImageProcessorBackend::ProcessLegacy(scoped_refptr<VideoFrame> frame,
                                          LegacyFrameReadyCB cb) {
  DCHECK_CALLED_ON_VALID_SEQUENCE(backend_sequence_checker_);

  NOTIMPLEMENTED();
}

void ImageProcessorBackend::Reset() {
  DVLOGF(3);
  DCHECK_CALLED_ON_VALID_SEQUENCE(backend_sequence_checker_);
  // Do nothing as the default action.
}

}  // namespace media

namespace std {

void default_delete<media::ImageProcessorBackend>::operator()(
    media::ImageProcessorBackend* ptr) const {
  ptr->Destroy();
}

}  // namespace std