2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
11 #ifndef WEBRTC_COMMON_AUDIO_RESAMPLER_INCLUDE_PUSH_RESAMPLER_H_
12 #define WEBRTC_COMMON_AUDIO_RESAMPLER_INCLUDE_PUSH_RESAMPLER_H_
14 #include "webrtc/system_wrappers/interface/scoped_ptr.h"
15 #include "webrtc/typedefs.h"
19 class PushSincResampler;
21 // Wraps PushSincResampler to provide stereo support.
22 // TODO(ajm): add support for an arbitrary number of channels.
27 virtual ~PushResampler();
29 // Must be called whenever the parameters change. Free to be called at any
30 // time as it is a no-op if parameters have not changed since the last call.
31 int InitializeIfNeeded(int src_sample_rate_hz, int dst_sample_rate_hz,
34 // Returns the total number of samples provided in destination (e.g. 32 kHz,
35 // 2 channel audio gives 640 samples).
36 int Resample(const T* src, int src_length, T* dst, int dst_capacity);
39 scoped_ptr<PushSincResampler> sinc_resampler_;
40 scoped_ptr<PushSincResampler> sinc_resampler_right_;
41 int src_sample_rate_hz_;
42 int dst_sample_rate_hz_;
44 scoped_ptr<T[]> src_left_;
45 scoped_ptr<T[]> src_right_;
46 scoped_ptr<T[]> dst_left_;
47 scoped_ptr<T[]> dst_right_;
52 #endif // WEBRTC_COMMON_AUDIO_RESAMPLER_INCLUDE_PUSH_RESAMPLER_H_