| /* |
| * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "api/video/video_content_type.h" |
| |
| #include "rtc_base/checks.h" |
| |
| namespace webrtc { |
| namespace videocontenttypehelpers { |
| |
| namespace { |
| static constexpr uint8_t kScreenshareBitsSize = 1; |
| static constexpr uint8_t kScreenshareBitsMask = |
| (1u << kScreenshareBitsSize) - 1; |
| } // namespace |
| |
| bool IsScreenshare(const VideoContentType& content_type) { |
| // Ensure no bits apart from the screenshare bit is set. |
| // This CHECK is a temporary measure to detect code that introduces |
| // values according to old versions. |
| RTC_CHECK((static_cast<uint8_t>(content_type) & !kScreenshareBitsMask) == 0); |
| return (static_cast<uint8_t>(content_type) & kScreenshareBitsMask) > 0; |
| } |
| |
| bool IsValidContentType(uint8_t value) { |
| // Only the screenshare bit is allowed. |
| // However, due to previous usage of the next 5 bits, we allow |
| // the lower 6 bits to be set. |
| return value < (1 << 6); |
| } |
| |
| const char* ToString(const VideoContentType& content_type) { |
| return IsScreenshare(content_type) ? "screen" : "realtime"; |
| } |
| } // namespace videocontenttypehelpers |
| } // namespace webrtc |