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Diffstat (limited to 'chromium/third_party/webrtc/modules/audio_coding/neteq4/decision_logic.h')
| -rw-r--r-- | chromium/third_party/webrtc/modules/audio_coding/neteq4/decision_logic.h | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/chromium/third_party/webrtc/modules/audio_coding/neteq4/decision_logic.h b/chromium/third_party/webrtc/modules/audio_coding/neteq4/decision_logic.h deleted file mode 100644 index aca5ca40559..00000000000 --- a/chromium/third_party/webrtc/modules/audio_coding/neteq4/decision_logic.h +++ /dev/null @@ -1,168 +0,0 @@ -/* - * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. - * - * Use of this source code is governed by a BSD-style license - * that can be found in the LICENSE file in the root of the source - * tree. An additional intellectual property rights grant can be found - * in the file PATENTS. All contributing project authors may - * be found in the AUTHORS file in the root of the source tree. - */ - -#ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ4_DECISION_LOGIC_H_ -#define WEBRTC_MODULES_AUDIO_CODING_NETEQ4_DECISION_LOGIC_H_ - -#include "webrtc/modules/audio_coding/neteq4/defines.h" -#include "webrtc/modules/audio_coding/neteq4/interface/neteq.h" -#include "webrtc/system_wrappers/interface/constructor_magic.h" -#include "webrtc/typedefs.h" - -namespace webrtc { - -// Forward declarations. -class BufferLevelFilter; -class DecoderDatabase; -class DelayManager; -class Expand; -class PacketBuffer; -class SyncBuffer; -struct RTPHeader; - -// This is the base class for the decision tree implementations. Derived classes -// must implement the method GetDecisionSpecialized(). -class DecisionLogic { - public: - // Static factory function which creates different types of objects depending - // on the |playout_mode|. - static DecisionLogic* Create(int fs_hz, - int output_size_samples, - NetEqPlayoutMode playout_mode, - DecoderDatabase* decoder_database, - const PacketBuffer& packet_buffer, - DelayManager* delay_manager, - BufferLevelFilter* buffer_level_filter); - - // Constructor. - DecisionLogic(int fs_hz, - int output_size_samples, - NetEqPlayoutMode playout_mode, - DecoderDatabase* decoder_database, - const PacketBuffer& packet_buffer, - DelayManager* delay_manager, - BufferLevelFilter* buffer_level_filter); - - // Destructor. - virtual ~DecisionLogic() {} - - // Resets object to a clean state. - void Reset(); - - // Resets parts of the state. Typically done when switching codecs. - void SoftReset(); - - // Sets the sample rate and the output block size. - void SetSampleRate(int fs_hz, int output_size_samples); - - // Returns the operation that should be done next. |sync_buffer| and |expand| - // are provided for reference. |decoder_frame_length| is the number of samples - // obtained from the last decoded frame. If there is a packet available, the - // packet header should be supplied in |packet_header|; otherwise it should - // be NULL. The mode resulting form the last call to NetEqImpl::GetAudio is - // supplied in |prev_mode|. If there is a DTMF event to play, |play_dtmf| - // should be set to true. The output variable |reset_decoder| will be set to - // true if a reset is required; otherwise it is left unchanged (i.e., it can - // remain true if it was true before the call). - // This method end with calling GetDecisionSpecialized to get the actual - // return value. - Operations GetDecision(const SyncBuffer& sync_buffer, - const Expand& expand, - int decoder_frame_length, - const RTPHeader* packet_header, - Modes prev_mode, - bool play_dtmf, - bool* reset_decoder); - - // These methods test the |cng_state_| for different conditions. - bool CngRfc3389On() const { return cng_state_ == kCngRfc3389On; } - bool CngOff() const { return cng_state_ == kCngOff; } - - // Resets the |cng_state_| to kCngOff. - void SetCngOff() { cng_state_ = kCngOff; } - - // Reports back to DecisionLogic whether the decision to do expand remains or - // not. Note that this is necessary, since an expand decision can be changed - // to kNormal in NetEqImpl::GetDecision if there is still enough data in the - // sync buffer. - void ExpandDecision(bool is_expand_decision); - - // Adds |value| to |sample_memory_|. - void AddSampleMemory(int32_t value) { - sample_memory_ += value; - } - - // Accessors and mutators. - void set_sample_memory(int32_t value) { sample_memory_ = value; } - int generated_noise_samples() const { return generated_noise_samples_; } - void set_generated_noise_samples(int value) { - generated_noise_samples_ = value; - } - int packet_length_samples() const { return packet_length_samples_; } - void set_packet_length_samples(int value) { - packet_length_samples_ = value; - } - void set_prev_time_scale(bool value) { prev_time_scale_ = value; } - NetEqPlayoutMode playout_mode() const { return playout_mode_; } - - protected: - // The value 6 sets maximum time-stretch rate to about 100 ms/s. - static const int kMinTimescaleInterval = 6; - - enum CngState { - kCngOff, - kCngRfc3389On, - kCngInternalOn - }; - - // Returns the operation that should be done next. |sync_buffer| and |expand| - // are provided for reference. |decoder_frame_length| is the number of samples - // obtained from the last decoded frame. If there is a packet available, the - // packet header should be supplied in |packet_header|; otherwise it should - // be NULL. The mode resulting form the last call to NetEqImpl::GetAudio is - // supplied in |prev_mode|. If there is a DTMF event to play, |play_dtmf| - // should be set to true. The output variable |reset_decoder| will be set to - // true if a reset is required; otherwise it is left unchanged (i.e., it can - // remain true if it was true before the call). - // Should be implemented by derived classes. - virtual Operations GetDecisionSpecialized(const SyncBuffer& sync_buffer, - const Expand& expand, - int decoder_frame_length, - const RTPHeader* packet_header, - Modes prev_mode, - bool play_dtmf, - bool* reset_decoder) = 0; - - // Updates the |buffer_level_filter_| with the current buffer level - // |buffer_size_packets|. - void FilterBufferLevel(int buffer_size_packets, Modes prev_mode); - - DecoderDatabase* decoder_database_; - const PacketBuffer& packet_buffer_; - DelayManager* delay_manager_; - BufferLevelFilter* buffer_level_filter_; - int fs_mult_; - int output_size_samples_; - CngState cng_state_; // Remember if comfort noise is interrupted by other - // event (e.g., DTMF). - int generated_noise_samples_; - int packet_length_samples_; - int sample_memory_; - bool prev_time_scale_; - int timescale_hold_off_; - int num_consecutive_expands_; - const NetEqPlayoutMode playout_mode_; - - private: - DISALLOW_COPY_AND_ASSIGN(DecisionLogic); -}; - -} // namespace webrtc -#endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ4_DECISION_LOGIC_H_ |