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/*
* 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
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