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1 /* | 1 /* |
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 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 /* | 11 /* |
12 * Contains functions often used by different parts of VoiceEngine. | 12 * Contains functions often used by different parts of VoiceEngine. |
13 */ | 13 */ |
14 | 14 |
15 #ifndef WEBRTC_VOICE_ENGINE_UTILITY_H_ | 15 #ifndef WEBRTC_VOICE_ENGINE_UTILITY_H_ |
16 #define WEBRTC_VOICE_ENGINE_UTILITY_H_ | 16 #define WEBRTC_VOICE_ENGINE_UTILITY_H_ |
17 | 17 |
18 #include "webrtc/common_audio/resampler/include/push_resampler.h" | 18 #include "webrtc/common_audio/resampler/include/push_resampler.h" |
19 #include "webrtc/typedefs.h" | 19 #include "webrtc/typedefs.h" |
20 | 20 |
21 namespace webrtc { | 21 namespace webrtc { |
22 | 22 |
23 class AudioFrame; | 23 class AudioFrame; |
24 | 24 |
25 namespace voe { | 25 namespace voe { |
26 | 26 |
27 // Upmix or downmix and resample the audio in |src_frame| to |dst_frame|. | 27 // Upmix or downmix and resample the audio in |src_frame| to |dst_frame|. |
28 // Expects |dst_frame| to have its sample rate and channels members set to the | 28 // Expects |dst_frame| to have its sample rate and channels members set to the |
29 // desired values. Updates the samples per channel member accordingly. No other | 29 // desired values. Updates the |samples_per_channel_|, |timestamp_|, |
30 // members will be changed. | 30 // |elapsed_time_ms_| and |ntp_time_ms_| members accordingly. |
31 void RemixAndResample(const AudioFrame& src_frame, | 31 void RemixAndResample(const AudioFrame& src_frame, |
32 PushResampler<int16_t>* resampler, | 32 PushResampler<int16_t>* resampler, |
33 AudioFrame* dst_frame); | 33 AudioFrame* dst_frame); |
34 | 34 |
35 // Downmix and downsample the audio in |src_data| to |dst_af| as necessary, | 35 // Upmix or downmix and resample the audio in |src_data| to |dst_frame|. Expects |
36 // specified by |codec_num_channels| and |codec_rate_hz|. |mono_buffer| is | 36 // dst_frame| to have its sample rate and channels members set to the desired |
Andrew MacDonald
2015/09/23 17:31:47
Rather than repeating the comments please write th
aluebs-webrtc
2015/09/23 19:48:54
Done.
| |
37 // temporary space and must be of sufficient size to hold the downmixed source | 37 // values. Updates the |samples_per_channel_| members accordingly. |
38 // audio (recommend using a size of kMaxMonoDataSizeSamples). | 38 void RemixAndResample(const int16_t* src_data, |
39 // | 39 size_t samples_per_channel, |
40 // |dst_af| will have its data and format members (sample rate, channels and | 40 int num_channels, |
41 // samples per channel) set appropriately. No other members will be changed. | 41 int sample_rate_hz, |
42 // TODO(ajm): For now, this still calls Reset() on |dst_af|. Remove this, as | 42 PushResampler<int16_t>* resampler, |
43 // it shouldn't be needed. | 43 AudioFrame* dst_frame); |
44 void DownConvertToCodecFormat(const int16_t* src_data, | |
45 size_t samples_per_channel, | |
46 int num_channels, | |
47 int sample_rate_hz, | |
48 int codec_num_channels, | |
49 int codec_rate_hz, | |
50 int16_t* mono_buffer, | |
51 PushResampler<int16_t>* resampler, | |
52 AudioFrame* dst_af); | |
53 | 44 |
54 void MixWithSat(int16_t target[], | 45 void MixWithSat(int16_t target[], |
55 int target_channel, | 46 int target_channel, |
56 const int16_t source[], | 47 const int16_t source[], |
57 int source_channel, | 48 int source_channel, |
58 size_t source_len); | 49 size_t source_len); |
59 | 50 |
60 } // namespace voe | 51 } // namespace voe |
61 } // namespace webrtc | 52 } // namespace webrtc |
62 | 53 |
63 #endif // WEBRTC_VOICE_ENGINE_UTILITY_H_ | 54 #endif // WEBRTC_VOICE_ENGINE_UTILITY_H_ |
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