1 | /* |
2 | Copyright 2018 Google Inc. All Rights Reserved. |
3 | |
4 | Licensed under the Apache License, Version 2.0 (the "License"); |
5 | you may not use this file except in compliance with the License. |
6 | You may obtain a copy of the License at |
7 | |
8 | http://www.apache.org/licenses/LICENSE-2.0 |
9 | |
10 | Unless required by applicable law or agreed to in writing, software |
11 | distributed under the License is distributed on an "AS-IS" BASIS, |
12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | See the License for the specific language governing permissions and |
14 | limitations under the License. |
15 | */ |
16 | |
17 | #include "dsp/channel_converter.h" |
18 | |
19 | #include <cmath> |
20 | |
21 | #include "base/constants_and_types.h" |
22 | #include "base/logging.h" |
23 | #include "base/simd_utils.h" |
24 | |
25 | namespace vraudio { |
26 | |
27 | void ConvertStereoFromMono(const AudioBuffer& input, AudioBuffer* output) { |
28 | DCHECK(output); |
29 | DCHECK_EQ(input.num_channels(), kNumMonoChannels); |
30 | DCHECK_EQ(output->num_channels(), kNumStereoChannels); |
31 | DCHECK_EQ(input.num_frames(), output->num_frames()); |
32 | StereoFromMonoSimd(length: input.num_frames(), mono: &input[0][0], left: &(*output)[0][0], |
33 | right: &(*output)[1][0]); |
34 | } |
35 | |
36 | void ConvertMonoFromStereo(const AudioBuffer& input, AudioBuffer* output) { |
37 | DCHECK(output); |
38 | DCHECK_EQ(input.num_channels(), kNumStereoChannels); |
39 | DCHECK_EQ(output->num_channels(), kNumMonoChannels); |
40 | DCHECK_EQ(input.num_frames(), output->num_frames()); |
41 | MonoFromStereoSimd(length: input.num_frames(), left: &input[0][0], right: &input[1][0], |
42 | mono: &(*output)[0][0]); |
43 | } |
44 | |
45 | } // namespace vraudio |
46 | |