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1 /* | |
2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. | |
3 * | |
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. | |
9 */ | |
10 | |
11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_BEAMFORMER_H_ | |
12 #define WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_BEAMFORMER_H_ | |
13 | |
14 #include "webrtc/common_audio/channel_buffer.h" | |
15 #include "webrtc/modules/audio_processing/beamformer/array_util.h" | |
16 | |
17 namespace webrtc { | |
18 | |
19 template<typename T> | |
20 class Beamformer { | |
21 public: | |
22 virtual ~Beamformer() {} | |
23 | |
24 // Process one time-domain chunk of audio. The audio is expected to be split | |
25 // into frequency bands inside the ChannelBuffer. The number of frames and | |
26 // channels must correspond to the constructor parameters. The same | |
27 // ChannelBuffer can be passed in as |input| and |output|. | |
28 virtual void ProcessChunk(const ChannelBuffer<T>& input, | |
29 ChannelBuffer<T>* output) = 0; | |
30 | |
31 // Sample rate corresponds to the lower band. | |
32 // Needs to be called before the the Beamformer can be used. | |
33 virtual void Initialize(int chunk_size_ms, int sample_rate_hz) = 0; | |
34 | |
35 // Aim the beamformer at a point in space. | |
36 virtual void AimAt(const SphericalPointf& spherical_point) = 0; | |
37 | |
38 // Indicates whether a given point is inside of the beam. | |
39 virtual bool IsInBeam(const SphericalPointf& spherical_point) { return true; } | |
40 | |
41 // Returns true if the current data contains the target signal. | |
42 // Which signals are considered "targets" is implementation dependent. | |
43 virtual bool is_target_present() = 0; | |
44 }; | |
45 | |
46 } // namespace webrtc | |
47 | |
48 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_BEAMFORMER_H_ | |
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