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