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Diffstat (limited to 'firmware/target/hosted/ibasso/dx50/codec-dx50.h')
-rw-r--r-- | firmware/target/hosted/ibasso/dx50/codec-dx50.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/firmware/target/hosted/ibasso/dx50/codec-dx50.h b/firmware/target/hosted/ibasso/dx50/codec-dx50.h new file mode 100644 index 0000000000..89a1a3f1c4 --- /dev/null +++ b/firmware/target/hosted/ibasso/dx50/codec-dx50.h | |||
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1 | /*************************************************************************** | ||
2 | * __________ __ ___ | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * | ||
9 | * Copyright (C) 2014 by Ilia Sergachev: Initial Rockbox port to iBasso DX50 | ||
10 | * Copyright (C) 2014 by Mario Basister: iBasso DX90 port | ||
11 | * Copyright (C) 2014 by Simon Rothen: Initial Rockbox repository submission, additional features | ||
12 | * Copyright (C) 2014 by Udo Schläpfer: Code clean up, additional features | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or | ||
15 | * modify it under the terms of the GNU General Public License | ||
16 | * as published by the Free Software Foundation; either version 2 | ||
17 | * of the License, or (at your option) any later version. | ||
18 | * | ||
19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
20 | * KIND, either express or implied. | ||
21 | * | ||
22 | ****************************************************************************/ | ||
23 | |||
24 | |||
25 | #ifndef _CODEC_DX50_H_ | ||
26 | #define _CODEC_DX50_H_ | ||
27 | |||
28 | |||
29 | #define AUDIOHW_CAPS MONO_VOL_CAP | ||
30 | |||
31 | |||
32 | /* | ||
33 | http://www.wolfsonmicro.com/media/76425/WM8740.pdf | ||
34 | |||
35 | 0.5 * ( x - 255 ) = ydB 1 <= x <= 255 | ||
36 | mute x = 0 | ||
37 | |||
38 | x = 255 -> 0dB | ||
39 | . | ||
40 | . | ||
41 | . | ||
42 | x = 2 -> -126.5dB | ||
43 | x = 1 -> -127dB | ||
44 | x = 0 -> -128dB | ||
45 | |||
46 | See audiohw.h, sound.c. | ||
47 | */ | ||
48 | AUDIOHW_SETTING(VOLUME, "dB", 0, 1, -128, 0, -30) | ||
49 | |||
50 | |||
51 | #endif | ||