1 /* 2 * Copyright (c) 2012 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_NETEQ_NORMAL_H_ 12 #define WEBRTC_MODULES_AUDIO_CODING_NETEQ_NORMAL_H_ 13 14 #include <string.h> // Access to size_t. 15 16 #include <vector> 17 18 #include "webrtc/base/constructormagic.h" 19 #include "webrtc/modules/audio_coding/neteq/audio_multi_vector.h" 20 #include "webrtc/modules/audio_coding/neteq/defines.h" 21 #include "webrtc/typedefs.h" 22 23 namespace webrtc { 24 25 // Forward declarations. 26 class BackgroundNoise; 27 class DecoderDatabase; 28 class Expand; 29 30 // This class provides the "Normal" DSP operation, that is performed when 31 // there is no data loss, no need to stretch the timing of the signal, and 32 // no other "special circumstances" are at hand. 33 class Normal { 34 public: Normal(int fs_hz,DecoderDatabase * decoder_database,const BackgroundNoise & background_noise,Expand * expand)35 Normal(int fs_hz, DecoderDatabase* decoder_database, 36 const BackgroundNoise& background_noise, 37 Expand* expand) 38 : fs_hz_(fs_hz), 39 decoder_database_(decoder_database), 40 background_noise_(background_noise), 41 expand_(expand) { 42 } 43 ~Normal()44 virtual ~Normal() {} 45 46 // Performs the "Normal" operation. The decoder data is supplied in |input|, 47 // having |length| samples in total for all channels (interleaved). The 48 // result is written to |output|. The number of channels allocated in 49 // |output| defines the number of channels that will be used when 50 // de-interleaving |input|. |last_mode| contains the mode used in the previous 51 // GetAudio call (i.e., not the current one), and |external_mute_factor| is 52 // a pointer to the mute factor in the NetEqImpl class. 53 int Process(const int16_t* input, size_t length, 54 Modes last_mode, 55 int16_t* external_mute_factor_array, 56 AudioMultiVector* output); 57 58 private: 59 int fs_hz_; 60 DecoderDatabase* decoder_database_; 61 const BackgroundNoise& background_noise_; 62 Expand* expand_; 63 64 RTC_DISALLOW_COPY_AND_ASSIGN(Normal); 65 }; 66 67 } // namespace webrtc 68 #endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_NORMAL_H_ 69