mirror of
https://github.com/oxen-io/session-android.git
synced 2024-11-30 21:45:20 +00:00
74 lines
2.3 KiB
C++
74 lines
2.3 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 WEBRTC_MODULES_AUDIO_CODING_NETEQ_COMFORT_NOISE_H_
|
|
#define WEBRTC_MODULES_AUDIO_CODING_NETEQ_COMFORT_NOISE_H_
|
|
|
|
#include "webrtc/base/constructormagic.h"
|
|
#include "webrtc/modules/audio_coding/neteq/audio_multi_vector.h"
|
|
#include "webrtc/typedefs.h"
|
|
|
|
namespace webrtc {
|
|
|
|
// Forward declarations.
|
|
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),
|
|
internal_error_code_(0) {
|
|
}
|
|
|
|
// Resets the state. Should be called before each new comfort noise period.
|
|
void Reset();
|
|
|
|
// Update the comfort noise generator with the parameters in |packet|.
|
|
// Will delete the packet.
|
|
int UpdateParameters(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_;
|
|
DISALLOW_COPY_AND_ASSIGN(ComfortNoise);
|
|
};
|
|
|
|
} // namespace webrtc
|
|
#endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_COMFORT_NOISE_H_
|