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/*
* 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_NORMAL_H_
#define WEBRTC_MODULES_AUDIO_CODING_NETEQ_NORMAL_H_
#include <string.h> // Access to size_t.
#include <vector>
#include "webrtc/base/constructormagic.h"
#include "webrtc/modules/audio_coding/neteq/audio_multi_vector.h"
#include "webrtc/modules/audio_coding/neteq/defines.h"
#include "webrtc/typedefs.h"
namespace webrtc {
// Forward declarations.
class BackgroundNoise;
class DecoderDatabase;
class Expand;
// This class provides the "Normal" DSP operation, that is performed when
// there is no data loss, no need to stretch the timing of the signal, and
// no other "special circumstances" are at hand.
class Normal {
public:
Normal(int fs_hz, DecoderDatabase* decoder_database,
const BackgroundNoise& background_noise,
Expand* expand)
: fs_hz_(fs_hz),
decoder_database_(decoder_database),
background_noise_(background_noise),
expand_(expand) {
}
virtual ~Normal() {}
// Performs the "Normal" operation. The decoder data is supplied in |input|,
// having |length| samples in total for all channels (interleaved). The
// result is written to |output|. The number of channels allocated in
// |output| defines the number of channels that will be used when
// de-interleaving |input|. |last_mode| contains the mode used in the previous
// GetAudio call (i.e., not the current one), and |external_mute_factor| is
// a pointer to the mute factor in the NetEqImpl class.
int Process(const int16_t* input, size_t length,
Modes last_mode,
int16_t* external_mute_factor_array,
AudioMultiVector* output);
private:
int fs_hz_;
DecoderDatabase* decoder_database_;
const BackgroundNoise& background_noise_;
Expand* expand_;
DISALLOW_COPY_AND_ASSIGN(Normal);
};
} // namespace webrtc
#endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_NORMAL_H_
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