1 /* 2 * Copyright (c) 2014 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 MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_ 12 #define MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_ 13 14 #include <stddef.h> 15 #include <stdint.h> 16 17 #include <utility> 18 19 #include "absl/types/optional.h" 20 #include "api/audio_codecs/audio_encoder.h" 21 #include "api/audio_codecs/ilbc/audio_encoder_ilbc_config.h" 22 #include "api/units/time_delta.h" 23 #include "modules/audio_coding/codecs/ilbc/ilbc.h" 24 25 namespace webrtc { 26 27 class AudioEncoderIlbcImpl final : public AudioEncoder { 28 public: 29 AudioEncoderIlbcImpl(const AudioEncoderIlbcConfig& config, int payload_type); 30 ~AudioEncoderIlbcImpl() override; 31 32 AudioEncoderIlbcImpl(const AudioEncoderIlbcImpl&) = delete; 33 AudioEncoderIlbcImpl& operator=(const AudioEncoderIlbcImpl&) = delete; 34 35 int SampleRateHz() const override; 36 size_t NumChannels() const override; 37 size_t Num10MsFramesInNextPacket() const override; 38 size_t Max10MsFramesInAPacket() const override; 39 int GetTargetBitrate() const override; 40 EncodedInfo EncodeImpl(uint32_t rtp_timestamp, 41 rtc::ArrayView<const int16_t> audio, 42 rtc::Buffer* encoded) override; 43 void Reset() override; 44 absl::optional<std::pair<TimeDelta, TimeDelta>> GetFrameLengthRange() 45 const override; 46 47 private: 48 size_t RequiredOutputSizeBytes() const; 49 50 static constexpr size_t kMaxSamplesPerPacket = 480; 51 const int frame_size_ms_; 52 const int payload_type_; 53 const size_t num_10ms_frames_per_packet_; 54 size_t num_10ms_frames_buffered_; 55 uint32_t first_timestamp_in_buffer_; 56 int16_t input_buffer_[kMaxSamplesPerPacket]; 57 IlbcEncoderInstance* encoder_; 58 }; 59 60 } // namespace webrtc 61 #endif // MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_ 62