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_G711_AUDIO_ENCODER_G711_H_ 12 #define API_AUDIO_CODECS_G711_AUDIO_ENCODER_G711_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_encoder.h" 20 #include "api/audio_codecs/audio_format.h" 21 #include "rtc_base/system/rtc_export.h" 22 23 namespace webrtc { 24 25 // G711 encoder API for use as a template parameter to 26 // CreateAudioEncoderFactory<...>(). 27 struct RTC_EXPORT AudioEncoderG711 { 28 struct Config { 29 enum class Type { kPcmU, kPcmA }; IsOkAudioEncoderG711::Config30 bool IsOk() const { 31 return (type == Type::kPcmU || type == Type::kPcmA) && 32 frame_size_ms > 0 && frame_size_ms % 10 == 0 && num_channels >= 1; 33 } 34 Type type = Type::kPcmU; 35 int num_channels = 1; 36 int frame_size_ms = 20; 37 }; 38 static absl::optional<AudioEncoderG711::Config> SdpToConfig( 39 const SdpAudioFormat& audio_format); 40 static void AppendSupportedEncoders(std::vector<AudioCodecSpec>* specs); 41 static AudioCodecInfo QueryAudioEncoder(const Config& config); 42 static std::unique_ptr<AudioEncoder> MakeAudioEncoder( 43 const Config& config, 44 int payload_type, 45 absl::optional<AudioCodecPairId> codec_pair_id = absl::nullopt); 46 }; 47 48 } // namespace webrtc 49 50 #endif // API_AUDIO_CODECS_G711_AUDIO_ENCODER_G711_H_ 51