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 WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_ 12 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_ 13 14 #include "webrtc/base/scoped_ptr.h" 15 #include "webrtc/modules/audio_coding/codecs/audio_encoder.h" 16 #include "webrtc/modules/audio_coding/codecs/ilbc/ilbc.h" 17 18 namespace webrtc { 19 20 struct CodecInst; 21 22 class AudioEncoderIlbc final : public AudioEncoder { 23 public: 24 struct Config { 25 bool IsOk() const; 26 27 int payload_type = 102; 28 int frame_size_ms = 30; // Valid values are 20, 30, 40, and 60 ms. 29 // Note that frame size 40 ms produces encodings with two 20 ms frames in 30 // them, and frame size 60 ms consists of two 30 ms frames. 31 }; 32 33 explicit AudioEncoderIlbc(const Config& config); 34 explicit AudioEncoderIlbc(const CodecInst& codec_inst); 35 ~AudioEncoderIlbc() override; 36 37 size_t MaxEncodedBytes() const override; 38 int SampleRateHz() const override; 39 size_t NumChannels() const override; 40 size_t Num10MsFramesInNextPacket() const override; 41 size_t Max10MsFramesInAPacket() const override; 42 int GetTargetBitrate() const override; 43 EncodedInfo EncodeInternal(uint32_t rtp_timestamp, 44 rtc::ArrayView<const int16_t> audio, 45 size_t max_encoded_bytes, 46 uint8_t* encoded) override; 47 void Reset() override; 48 49 private: 50 size_t RequiredOutputSizeBytes() const; 51 52 static const size_t kMaxSamplesPerPacket = 480; 53 const Config config_; 54 const size_t num_10ms_frames_per_packet_; 55 size_t num_10ms_frames_buffered_; 56 uint32_t first_timestamp_in_buffer_; 57 int16_t input_buffer_[kMaxSamplesPerPacket]; 58 IlbcEncoderInstance* encoder_; 59 RTC_DISALLOW_COPY_AND_ASSIGN(AudioEncoderIlbc); 60 }; 61 62 } // namespace webrtc 63 #endif // WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_ 64