tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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vp9_profile.cc (2103B)

      1 /*
      2 *  Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
      3 *
      4 *  Use of this source code is governed by a BSD-style license
      5 *  that can be found in the LICENSE file in the root of the source
      6 *  tree. An additional intellectual property rights grant can be found
      7 *  in the file PATENTS.  All contributing project authors may
      8 *  be found in the AUTHORS file in the root of the source tree.
      9 */
     10 
     11 #include "api/video_codecs/vp9_profile.h"
     12 
     13 #include <map>
     14 #include <optional>
     15 #include <string>
     16 
     17 #include "api/rtp_parameters.h"
     18 #include "rtc_base/string_to_number.h"
     19 
     20 namespace webrtc {
     21 
     22 // Profile information for VP9 video.
     23 const char kVP9FmtpProfileId[] = "profile-id";
     24 
     25 std::string VP9ProfileToString(VP9Profile profile) {
     26  switch (profile) {
     27    case VP9Profile::kProfile0:
     28      return "0";
     29    case VP9Profile::kProfile1:
     30      return "1";
     31    case VP9Profile::kProfile2:
     32      return "2";
     33    case VP9Profile::kProfile3:
     34      return "3";
     35  }
     36  return "0";
     37 }
     38 
     39 std::optional<VP9Profile> StringToVP9Profile(const std::string& str) {
     40  const std::optional<int> i = StringToNumber<int>(str);
     41  if (!i.has_value())
     42    return std::nullopt;
     43 
     44  switch (i.value()) {
     45    case 0:
     46      return VP9Profile::kProfile0;
     47    case 1:
     48      return VP9Profile::kProfile1;
     49    case 2:
     50      return VP9Profile::kProfile2;
     51    case 3:
     52      return VP9Profile::kProfile3;
     53    default:
     54      return std::nullopt;
     55  }
     56 }
     57 
     58 std::optional<VP9Profile> ParseSdpForVP9Profile(
     59    const CodecParameterMap& params) {
     60  const auto profile_it = params.find(kVP9FmtpProfileId);
     61  if (profile_it == params.end())
     62    return VP9Profile::kProfile0;
     63  const std::string& profile_str = profile_it->second;
     64  return StringToVP9Profile(profile_str);
     65 }
     66 
     67 bool VP9IsSameProfile(const CodecParameterMap& params1,
     68                      const CodecParameterMap& params2) {
     69  const std::optional<VP9Profile> profile = ParseSdpForVP9Profile(params1);
     70  const std::optional<VP9Profile> other_profile =
     71      ParseSdpForVP9Profile(params2);
     72  return profile && other_profile && profile == other_profile;
     73 }
     74 
     75 }  // namespace webrtc