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3719602c PC |
1 | /* Copyright (C) 2010-2023 The RetroArch team |
2 | * | |
3 | * --------------------------------------------------------------------------------------- | |
4 | * The following license statement only applies to this file (mono_to_stereo.c). | |
5 | * --------------------------------------------------------------------------------------- | |
6 | * | |
7 | * Permission is hereby granted, free of charge, | |
8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation the rights to | |
10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, | |
11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
21 | */ | |
22 | #include <stdint.h> | |
23 | #include <stddef.h> | |
24 | ||
25 | #include <audio/conversion/dual_mono.h> | |
26 | ||
27 | /* TODO: Use SIMD instructions to make this faster (or show that it's not needed) */ | |
28 | void convert_to_mono_float_left(float *out, const float *in, size_t frames) | |
29 | { | |
30 | unsigned i = 0; | |
31 | ||
32 | if (!out || !in || !frames) | |
33 | return; | |
34 | ||
35 | for (; i < frames; i++) | |
36 | { | |
37 | out[i] = in[i * 2]; | |
38 | } | |
39 | } | |
40 | ||
41 | /* Why is there no equivalent for int16_t samples? | |
42 | * No inherent reason, I just didn't need one. | |
43 | * If you do, open a pull request. | |
44 | * Same goes for the lack of a convert_to_mono_float_right; | |
45 | * I didn't need one, so I didn't write one. */ |