55805e13a4
This allows the user to make use of the DAC's power-saving abilities. The two modes are "high performance" and "battery saver". This feature is supported by the AK4376 DAC in the upcoming FiiO M3K port. The setting is only a manual toggle right now, but in the future it could be hooked up to the battery level (via another setting) so it can be toggled automatically when the battery gets too low. Change-Id: I482af6e2f969fcbdeb3411bd3ff91f866b12d027
132 lines
4 KiB
C
132 lines
4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright © 2010 Thomas Martitz
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <SDL_audio.h>
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#include "config.h"
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#include "sound.h"
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#include "pcm_sampr.h"
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#ifdef HAVE_SW_VOLUME_CONTROL
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#include "pcm_sw_volume.h"
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#include "fixedpoint.h"
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#endif
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/**
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* Audio Hardware api. Make some of them do nothing as we cannot properly
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* simulate with SDL. if we used DSP we would run code that doesn't actually
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* run on the target
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**/
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#ifdef HAVE_SW_VOLUME_CONTROL
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static int sdl_volume_level(int volume)
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{
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int shift = (1 - sound_numdecimals(SOUND_VOLUME)) << 16;
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int minvol = fp_mul(sound_min(SOUND_VOLUME), fp_exp10(shift, 16), 16);
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return volume <= minvol ? INT_MIN : volume;
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}
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#endif /* HAVE_SW_VOLUME_CONTROL */
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#if defined(AUDIOHW_HAVE_MONO_VOLUME)
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void audiohw_set_volume(int volume)
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{
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#ifdef HAVE_SW_VOLUME_CONTROL
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volume = sdl_volume_level(volume);
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pcm_set_master_volume(volume, volume);
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#else
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extern void pcm_set_mixer_volume(int volume);
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pcm_set_mixer_volume(volume);
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#endif
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(void)volume;
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}
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#else /* !AUDIOHW_HAVE_MONO_VOLUME */
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void audiohw_set_volume(int vol_l, int vol_r)
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{
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#ifdef HAVE_SW_VOLUME_CONTROL
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vol_l = sdl_volume_level(vol_l);
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vol_r = sdl_volume_level(vol_r);
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pcm_set_master_volume(vol_l, vol_r);
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#endif
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(void)vol_l; (void)vol_r;
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}
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#endif /* AUDIOHW_HAVE_MONO_VOLUME */
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#if defined(AUDIOHW_HAVE_PRESCALER)
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void audiohw_set_prescaler(int value)
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{
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#ifdef HAVE_SW_VOLUME_CONTROL
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pcm_set_prescaler(value);
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#endif
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(void)value;
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}
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#endif /* AUDIOHW_HAVE_PRESCALER */
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#if defined(AUDIOHW_HAVE_BALANCE)
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void audiohw_set_balance(int value) { (void)value; }
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#endif
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#ifndef HAVE_SW_TONE_CONTROLS
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#if defined(AUDIOHW_HAVE_BASS)
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void audiohw_set_bass(int value) { (void)value; }
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#endif
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#if defined(AUDIOHW_HAVE_TREBLE)
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void audiohw_set_treble(int value) { (void)value; }
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#endif
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#endif /* HAVE_SW_TONE_CONTROLS */
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#if defined(AUDIOHW_HAVE_BASS_CUTOFF)
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void audiohw_set_bass_cutoff(int value) { (void)value; }
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#endif
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#if defined(AUDIOHW_HAVE_TREBLE_CUTOFF)
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void audiohw_set_treble_cutoff(int value){ (void)value; }
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#endif
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/* EQ-based tone controls */
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#if defined(AUDIOHW_HAVE_EQ)
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void audiohw_set_eq_band_gain(unsigned int band, int value)
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{ (void)band; (void)value; }
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#endif
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#if defined(AUDIOHW_HAVE_EQ_FREQUENCY)
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void audiohw_set_eq_band_frequency(unsigned int band, int value)
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{ (void)band; (void)value; }
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#endif
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#if defined(AUDIOHW_HAVE_EQ_WIDTH)
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void audiohw_set_eq_band_width(unsigned int band, int value)
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{ (void)band; (void)value; }
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#endif
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#if defined(AUDIOHW_HAVE_DEPTH_3D)
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void audiohw_set_depth_3d(int value)
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{ (void)value; }
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#endif
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#if defined(AUDIOHW_HAVE_LINEOUT)
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void audiohw_set_lineout_volume(int vol_l, int vol_r)
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{ (void)vol_l; (void)vol_r; }
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#endif
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#if defined(AUDIOHW_HAVE_FILTER_ROLL_OFF)
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void audiohw_set_filter_roll_off(int value)
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{ (void)value; }
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#endif
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#if defined(AUDIOHW_HAVE_POWER_MODE)
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void audiohw_set_power_mode(int value)
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{ (void)value; }
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#endif
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void audiohw_close(void) {}
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#ifdef CONFIG_SAMPR_TYPES
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unsigned int pcm_sampr_to_hw_sampr(unsigned int samplerate,
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unsigned int type)
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{ return samplerate; (void)type; }
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#endif /* CONFIG_SAMPR_TYPES */
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