1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
/*
* Copyright 2023 LiveKit
*
* Licensed under the Apache License, Version 2.0 (the “License”);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an “AS IS” BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "livekit/audio_resampler.h"
#include <memory>
#include "audio/remix_resample.h"
namespace livekit {
size_t AudioResampler::remix_and_resample(const int16_t* src,
size_t samples_per_channel,
size_t num_channels,
int sample_rate,
size_t dest_num_channels,
int dest_sample_rate) {
frame_.num_channels_ = dest_num_channels;
frame_.sample_rate_hz_ = dest_sample_rate;
webrtc::voe::RemixAndResample(src, samples_per_channel, num_channels,
sample_rate, &resampler_, &frame_);
return frame_.num_channels() * frame_.samples_per_channel() * sizeof(int16_t);
}
const int16_t* AudioResampler::data() const {
return frame_.data();
}
std::unique_ptr<AudioResampler> create_audio_resampler() {
return std::make_unique<AudioResampler>();
}
} // namespace livekit