mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-19 14:37:32 +00:00
121 lines
4.6 KiB
C++
121 lines
4.6 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_AUDIO_VECTOR_H_
|
|
#define WEBRTC_MODULES_AUDIO_CODING_NETEQ_AUDIO_VECTOR_H_
|
|
|
|
#include <string.h> // Access to size_t.
|
|
|
|
#include "webrtc/base/constructormagic.h"
|
|
#include "webrtc/system_wrappers/interface/scoped_ptr.h"
|
|
#include "webrtc/typedefs.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class AudioVector {
|
|
public:
|
|
// Creates an empty AudioVector.
|
|
AudioVector()
|
|
: array_(new int16_t[kDefaultInitialSize]),
|
|
first_free_ix_(0),
|
|
capacity_(kDefaultInitialSize) {}
|
|
|
|
// Creates an AudioVector with an initial size.
|
|
explicit AudioVector(size_t initial_size)
|
|
: array_(new int16_t[initial_size]),
|
|
first_free_ix_(initial_size),
|
|
capacity_(initial_size) {
|
|
memset(array_.get(), 0, initial_size * sizeof(int16_t));
|
|
}
|
|
|
|
virtual ~AudioVector() {}
|
|
|
|
// Deletes all values and make the vector empty.
|
|
virtual void Clear();
|
|
|
|
// Copies all values from this vector to |copy_to|. Any contents in |copy_to|
|
|
// are deleted before the copy operation. After the operation is done,
|
|
// |copy_to| will be an exact replica of this object.
|
|
virtual void CopyFrom(AudioVector* copy_to) const;
|
|
|
|
// Prepends the contents of AudioVector |prepend_this| to this object. The
|
|
// length of this object is increased with the length of |prepend_this|.
|
|
virtual void PushFront(const AudioVector& prepend_this);
|
|
|
|
// Same as above, but with an array |prepend_this| with |length| elements as
|
|
// source.
|
|
virtual void PushFront(const int16_t* prepend_this, size_t length);
|
|
|
|
// Same as PushFront but will append to the end of this object.
|
|
virtual void PushBack(const AudioVector& append_this);
|
|
|
|
// Same as PushFront but will append to the end of this object.
|
|
virtual void PushBack(const int16_t* append_this, size_t length);
|
|
|
|
// Removes |length| elements from the beginning of this object.
|
|
virtual void PopFront(size_t length);
|
|
|
|
// Removes |length| elements from the end of this object.
|
|
virtual void PopBack(size_t length);
|
|
|
|
// Extends this object with |extra_length| elements at the end. The new
|
|
// elements are initialized to zero.
|
|
virtual void Extend(size_t extra_length);
|
|
|
|
// Inserts |length| elements taken from the array |insert_this| and insert
|
|
// them at |position|. The length of the AudioVector is increased by |length|.
|
|
// |position| = 0 means that the new values are prepended to the vector.
|
|
// |position| = Size() means that the new values are appended to the vector.
|
|
virtual void InsertAt(const int16_t* insert_this, size_t length,
|
|
size_t position);
|
|
|
|
// Like InsertAt, but inserts |length| zero elements at |position|.
|
|
virtual void InsertZerosAt(size_t length, size_t position);
|
|
|
|
// Overwrites |length| elements of this AudioVector with values taken from the
|
|
// array |insert_this|, starting at |position|. The definition of |position|
|
|
// is the same as for InsertAt(). If |length| and |position| are selected
|
|
// such that the new data extends beyond the end of the current AudioVector,
|
|
// the vector is extended to accommodate the new data.
|
|
virtual void OverwriteAt(const int16_t* insert_this,
|
|
size_t length,
|
|
size_t position);
|
|
|
|
// Appends |append_this| to the end of the current vector. Lets the two
|
|
// vectors overlap by |fade_length| samples, and cross-fade linearly in this
|
|
// region.
|
|
virtual void CrossFade(const AudioVector& append_this, size_t fade_length);
|
|
|
|
// Returns the number of elements in this AudioVector.
|
|
virtual size_t Size() const { return first_free_ix_; }
|
|
|
|
// Returns true if this AudioVector is empty.
|
|
virtual bool Empty() const { return (first_free_ix_ == 0); }
|
|
|
|
// Accesses and modifies an element of AudioVector.
|
|
const int16_t& operator[](size_t index) const;
|
|
int16_t& operator[](size_t index);
|
|
|
|
private:
|
|
static const size_t kDefaultInitialSize = 10;
|
|
|
|
void Reserve(size_t n);
|
|
|
|
scoped_ptr<int16_t[]> array_;
|
|
size_t first_free_ix_; // The first index after the last sample in array_.
|
|
// Note that this index may point outside of array_.
|
|
size_t capacity_; // Allocated number of samples in the array.
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(AudioVector);
|
|
};
|
|
|
|
} // namespace webrtc
|
|
#endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_AUDIO_VECTOR_H_
|