blob: 7d728c2a73f16285da79cd973f2f708fa31a6671 [file] [log] [blame]
// 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 "media/capture/video/win/capability_list_win.h"
#include <algorithm>
#include <functional>
#include "base/logging.h"
#include "media/capture/video_capture_types.h"
namespace media {
static bool CompareCapability(const VideoCaptureFormat& requested,
const CapabilityWin& capability_lhs,
const CapabilityWin& capability_rhs) {
const VideoCaptureFormat& lhs = capability_lhs.supported_format;
const VideoCaptureFormat& rhs = capability_rhs.supported_format;
const int diff_height_lhs =
std::abs(lhs.frame_size.height() - requested.frame_size.height());
const int diff_height_rhs =
std::abs(rhs.frame_size.height() - requested.frame_size.height());
if (diff_height_lhs != diff_height_rhs)
return diff_height_lhs < diff_height_rhs;
const int diff_width_lhs =
std::abs(lhs.frame_size.width() - requested.frame_size.width());
const int diff_width_rhs =
std::abs(rhs.frame_size.width() - requested.frame_size.width());
if (diff_width_lhs != diff_width_rhs)
return diff_width_lhs < diff_width_rhs;
const float diff_fps_lhs = std::fabs(lhs.frame_rate - requested.frame_rate);
const float diff_fps_rhs = std::fabs(rhs.frame_rate - requested.frame_rate);
if (diff_fps_lhs != diff_fps_rhs)
return diff_fps_lhs < diff_fps_rhs;
return VideoCaptureFormat::ComparePixelFormatPreference(lhs.pixel_format,
rhs.pixel_format);
}
const CapabilityWin& GetBestMatchedCapability(
const VideoCaptureFormat& requested,
const CapabilityList& capabilities) {
DCHECK(!capabilities.empty());
const CapabilityWin* best_match = &(*capabilities.begin());
for (const CapabilityWin& capability : capabilities) {
if (CompareCapability(requested, capability, *best_match))
best_match = &capability;
}
return *best_match;
}
} // namespace media