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