diff options
Diffstat (limited to 'third_party/libwebrtc/modules/audio_coding/codecs/opus/audio_coder_opus_common.cc')
-rw-r--r-- | third_party/libwebrtc/modules/audio_coding/codecs/opus/audio_coder_opus_common.cc | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/opus/audio_coder_opus_common.cc b/third_party/libwebrtc/modules/audio_coding/codecs/opus/audio_coder_opus_common.cc new file mode 100644 index 0000000000..03c02186d0 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/codecs/opus/audio_coder_opus_common.cc @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2019 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 "modules/audio_coding/codecs/opus/audio_coder_opus_common.h" + +#include "absl/strings/string_view.h" + +namespace webrtc { + +absl::optional<std::string> GetFormatParameter(const SdpAudioFormat& format, + absl::string_view param) { + auto it = format.parameters.find(std::string(param)); + if (it == format.parameters.end()) + return absl::nullopt; + + return it->second; +} + +// Parses a comma-separated string "1,2,0,6" into a std::vector<unsigned char>. +template <> +absl::optional<std::vector<unsigned char>> GetFormatParameter( + const SdpAudioFormat& format, + absl::string_view param) { + std::vector<unsigned char> result; + const std::string comma_separated_list = + GetFormatParameter(format, param).value_or(""); + size_t pos = 0; + while (pos < comma_separated_list.size()) { + const size_t next_comma = comma_separated_list.find(',', pos); + const size_t distance_to_next_comma = next_comma == std::string::npos + ? std::string::npos + : (next_comma - pos); + auto substring_with_number = + comma_separated_list.substr(pos, distance_to_next_comma); + auto conv = rtc::StringToNumber<int>(substring_with_number); + if (!conv.has_value()) { + return absl::nullopt; + } + result.push_back(*conv); + pos += substring_with_number.size() + 1; + } + return result; +} + +} // namespace webrtc |