c2b785df5d
(This is a re-land---without the real_fourier.h changes---of 11716, which was reverted in 11726.) BUG=webrtc:5520 Review URL: https://codereview.webrtc.org/1731153002 Cr-Commit-Position: refs/heads/master@{#11742}
54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
/*
|
|
* 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_COMMON_AUDIO_RESAMPLER_INCLUDE_PUSH_RESAMPLER_H_
|
|
#define WEBRTC_COMMON_AUDIO_RESAMPLER_INCLUDE_PUSH_RESAMPLER_H_
|
|
|
|
#include <memory>
|
|
|
|
#include "webrtc/typedefs.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class PushSincResampler;
|
|
|
|
// Wraps PushSincResampler to provide stereo support.
|
|
// TODO(ajm): add support for an arbitrary number of channels.
|
|
template <typename T>
|
|
class PushResampler {
|
|
public:
|
|
PushResampler();
|
|
virtual ~PushResampler();
|
|
|
|
// Must be called whenever the parameters change. Free to be called at any
|
|
// time as it is a no-op if parameters have not changed since the last call.
|
|
int InitializeIfNeeded(int src_sample_rate_hz, int dst_sample_rate_hz,
|
|
size_t num_channels);
|
|
|
|
// Returns the total number of samples provided in destination (e.g. 32 kHz,
|
|
// 2 channel audio gives 640 samples).
|
|
int Resample(const T* src, size_t src_length, T* dst, size_t dst_capacity);
|
|
|
|
private:
|
|
std::unique_ptr<PushSincResampler> sinc_resampler_;
|
|
std::unique_ptr<PushSincResampler> sinc_resampler_right_;
|
|
int src_sample_rate_hz_;
|
|
int dst_sample_rate_hz_;
|
|
size_t num_channels_;
|
|
std::unique_ptr<T[]> src_left_;
|
|
std::unique_ptr<T[]> src_right_;
|
|
std::unique_ptr<T[]> dst_left_;
|
|
std::unique_ptr<T[]> dst_right_;
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // WEBRTC_COMMON_AUDIO_RESAMPLER_INCLUDE_PUSH_RESAMPLER_H_
|