mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-13 05:40:42 +01:00
604fd2f1ab
Bug: webrtc:13555, webrtc:13082 Change-Id: I2c2cbcbd918f0cfa970c1a964893220ba11d4b41 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/247960 Reviewed-by: Artem Titov <titovartem@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: (Daniel.L) Byoungchan Lee <daniel.l@hpcnt.com> Cr-Commit-Position: refs/heads/main@{#35771}
72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/*
|
|
* Copyright (c) 2012 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 MODULES_AUDIO_CODING_NETEQ_COMFORT_NOISE_H_
|
|
#define MODULES_AUDIO_CODING_NETEQ_COMFORT_NOISE_H_
|
|
|
|
#include <stddef.h>
|
|
|
|
namespace webrtc {
|
|
|
|
// Forward declarations.
|
|
class AudioMultiVector;
|
|
class DecoderDatabase;
|
|
class SyncBuffer;
|
|
struct Packet;
|
|
|
|
// This class acts as an interface to the CNG generator.
|
|
class ComfortNoise {
|
|
public:
|
|
enum ReturnCodes {
|
|
kOK = 0,
|
|
kUnknownPayloadType,
|
|
kInternalError,
|
|
kMultiChannelNotSupported
|
|
};
|
|
|
|
ComfortNoise(int fs_hz,
|
|
DecoderDatabase* decoder_database,
|
|
SyncBuffer* sync_buffer)
|
|
: fs_hz_(fs_hz),
|
|
first_call_(true),
|
|
overlap_length_(5 * fs_hz_ / 8000),
|
|
decoder_database_(decoder_database),
|
|
sync_buffer_(sync_buffer) {}
|
|
|
|
ComfortNoise(const ComfortNoise&) = delete;
|
|
ComfortNoise& operator=(const ComfortNoise&) = delete;
|
|
|
|
// Resets the state. Should be called before each new comfort noise period.
|
|
void Reset();
|
|
|
|
// Update the comfort noise generator with the parameters in `packet`.
|
|
int UpdateParameters(const Packet& packet);
|
|
|
|
// Generates `requested_length` samples of comfort noise and writes to
|
|
// `output`. If this is the first in call after Reset (or first after creating
|
|
// the object), it will also mix in comfort noise at the end of the
|
|
// SyncBuffer object provided in the constructor.
|
|
int Generate(size_t requested_length, AudioMultiVector* output);
|
|
|
|
// Returns the last error code that was produced by the comfort noise
|
|
// decoder. Returns 0 if no error has been encountered since the last reset.
|
|
int internal_error_code() { return internal_error_code_; }
|
|
|
|
private:
|
|
int fs_hz_;
|
|
bool first_call_;
|
|
size_t overlap_length_;
|
|
DecoderDatabase* decoder_database_;
|
|
SyncBuffer* sync_buffer_;
|
|
int internal_error_code_;
|
|
};
|
|
|
|
} // namespace webrtc
|
|
#endif // MODULES_AUDIO_CODING_NETEQ_COMFORT_NOISE_H_
|