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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 (s16_to_float.h). | |
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 | #ifndef __LIBRETRO_SDK_CONVERSION_DUAL_MONO__ | |
23 | #define __LIBRETRO_SDK_CONVERSION_DUAL_MONO__ | |
24 | ||
25 | #include <stdint.h> | |
26 | #include <stddef.h> | |
27 | ||
28 | #include <retro_common_api.h> | |
29 | ||
30 | RETRO_BEGIN_DECLS | |
31 | ||
32 | /** | |
33 | * Duplicates 1-channel (mono) frames into 2-channel (stereo) frames. | |
34 | * The resulting array is suitable for use in the resampler, | |
35 | * or for any use case that demands stereo input. | |
36 | * This version operates on 32-bit floating-point samples. | |
37 | * | |
38 | * May use SIMD intrinsics on supported platforms, | |
39 | * but will work without them. | |
40 | * | |
41 | * Will do nothing if \c out or \c in are \c NULL. | |
42 | * | |
43 | * @param[out] out The location in which the converted frames will be stored. | |
44 | * Must have enough room for twice the value of \c frames. | |
45 | * @param[in] in The location of the frames to convert. | |
46 | * @param[in] frames The number of frames to convert. | |
47 | */ | |
48 | void convert_to_dual_mono_float(float *out, const float *in, size_t frames); | |
49 | ||
50 | /** | |
51 | * Downmixes 2-channel (stereo) frames into 1-channel (mono) frames. | |
52 | * This is intended for dual-mono audio (i.e. where both channels are identical), | |
53 | * but it will work if both channels are different. | |
54 | * | |
55 | * This version operates on 32-bit floating-point samples. | |
56 | * It preserves the left channel and ignores the right channel. | |
57 | * | |
58 | * Will do nothing if \c out or \c in are \c NULL. | |
59 | * | |
60 | * @param[out] out The location in which the converted frames will be stored. | |
61 | * Must have enough room for half the value of <code>frames * sizeof(float)</code>. | |
62 | * @param[in] in The location of the frames to convert. | |
63 | * @param[in] frames The number of frames to convert. | |
64 | */ | |
65 | void convert_to_mono_float_left(float *out, const float *in, size_t frames); | |
66 | ||
67 | RETRO_END_DECLS | |
68 | ||
69 | #endif |