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1 /* | 1 /* |
2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #ifndef WEBRTC_COMMON_AUDIO_AUDIO_CONVERTER_H_ | 11 #ifndef WEBRTC_COMMON_AUDIO_AUDIO_CONVERTER_H_ |
12 #define WEBRTC_COMMON_AUDIO_AUDIO_CONVERTER_H_ | 12 #define WEBRTC_COMMON_AUDIO_AUDIO_CONVERTER_H_ |
13 | 13 |
| 14 #include <memory> |
| 15 |
14 #include "webrtc/base/constructormagic.h" | 16 #include "webrtc/base/constructormagic.h" |
15 #include "webrtc/base/scoped_ptr.h" | |
16 | 17 |
17 namespace webrtc { | 18 namespace webrtc { |
18 | 19 |
19 // Format conversion (remixing and resampling) for audio. Only simple remixing | 20 // Format conversion (remixing and resampling) for audio. Only simple remixing |
20 // conversions are supported: downmix to mono (i.e. |dst_channels| == 1) or | 21 // conversions are supported: downmix to mono (i.e. |dst_channels| == 1) or |
21 // upmix from mono (i.e. |src_channels == 1|). | 22 // upmix from mono (i.e. |src_channels == 1|). |
22 // | 23 // |
23 // The source and destination chunks have the same duration in time; specifying | 24 // The source and destination chunks have the same duration in time; specifying |
24 // the number of frames is equivalent to specifying the sample rates. | 25 // the number of frames is equivalent to specifying the sample rates. |
25 class AudioConverter { | 26 class AudioConverter { |
26 public: | 27 public: |
27 // Returns a new AudioConverter, which will use the supplied format for its | 28 // Returns a new AudioConverter, which will use the supplied format for its |
28 // lifetime. Caller is responsible for the memory. | 29 // lifetime. Caller is responsible for the memory. |
29 static rtc::scoped_ptr<AudioConverter> Create(size_t src_channels, | 30 static std::unique_ptr<AudioConverter> Create(size_t src_channels, |
30 size_t src_frames, | 31 size_t src_frames, |
31 size_t dst_channels, | 32 size_t dst_channels, |
32 size_t dst_frames); | 33 size_t dst_frames); |
33 virtual ~AudioConverter() {}; | 34 virtual ~AudioConverter() {}; |
34 | 35 |
35 // Convert |src|, containing |src_size| samples, to |dst|, having a sample | 36 // Convert |src|, containing |src_size| samples, to |dst|, having a sample |
36 // capacity of |dst_capacity|. Both point to a series of buffers containing | 37 // capacity of |dst_capacity|. Both point to a series of buffers containing |
37 // the samples for each channel. The sizes must correspond to the format | 38 // the samples for each channel. The sizes must correspond to the format |
38 // passed to Create(). | 39 // passed to Create(). |
39 virtual void Convert(const float* const* src, size_t src_size, | 40 virtual void Convert(const float* const* src, size_t src_size, |
(...skipping 17 matching lines...) Expand all Loading... |
57 const size_t src_frames_; | 58 const size_t src_frames_; |
58 const size_t dst_channels_; | 59 const size_t dst_channels_; |
59 const size_t dst_frames_; | 60 const size_t dst_frames_; |
60 | 61 |
61 RTC_DISALLOW_COPY_AND_ASSIGN(AudioConverter); | 62 RTC_DISALLOW_COPY_AND_ASSIGN(AudioConverter); |
62 }; | 63 }; |
63 | 64 |
64 } // namespace webrtc | 65 } // namespace webrtc |
65 | 66 |
66 #endif // WEBRTC_COMMON_AUDIO_AUDIO_CONVERTER_H_ | 67 #endif // WEBRTC_COMMON_AUDIO_AUDIO_CONVERTER_H_ |
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