1 /* 2 * Copyright (c) 2017 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 #ifndef API_AUDIO_CODECS_G722_AUDIO_DECODER_G722_H_ 12 #define API_AUDIO_CODECS_G722_AUDIO_DECODER_G722_H_ 13 14 #include <memory> 15 #include <vector> 16 17 #include "absl/types/optional.h" 18 #include "api/audio_codecs/audio_codec_pair_id.h" 19 #include "api/audio_codecs/audio_decoder.h" 20 #include "api/audio_codecs/audio_format.h" 21 #include "rtc_base/system/rtc_export.h" 22 23 namespace webrtc { 24 25 // G722 decoder API for use as a template parameter to 26 // CreateAudioDecoderFactory<...>(). 27 struct RTC_EXPORT AudioDecoderG722 { 28 struct Config { IsOkAudioDecoderG722::Config29 bool IsOk() const { return num_channels == 1 || num_channels == 2; } 30 int num_channels; 31 }; 32 static absl::optional<Config> SdpToConfig(const SdpAudioFormat& audio_format); 33 static void AppendSupportedDecoders(std::vector<AudioCodecSpec>* specs); 34 static std::unique_ptr<AudioDecoder> MakeAudioDecoder( 35 Config config, 36 absl::optional<AudioCodecPairId> codec_pair_id = absl::nullopt); 37 }; 38 39 } // namespace webrtc 40 41 #endif // API_AUDIO_CODECS_G722_AUDIO_DECODER_G722_H_ 42