d37bf24d90
Replaces the NATIVE_FREQUENCY constant with a configurable frequency. The user may select 48000Hz if the hardware supports it. The default is still 44100Hz and the minimum is 44100Hz. The setting is located in the playback settings, under "Frequency". "Frequency" was duplicated in english.lang for now to avoid having to fix every .lang file for the moment and throwing everything out of sync because of the new play_frequency feature in features.txt. The next cleanup should combine it with the one included for recording and generalize the ID label. If the hardware doesn't support 48000Hz, no setting will be available. On particular hardware where very high rates are practical and desireable, the upper bound can be extended by patching. The PCM mixer can be configured to play at the full hardware frequency range. The DSP core can configure to the hardware minimum up to the maximum playback setting (some buffers must be reserved according to the maximum rate). If only 44100Hz is supported or possible on a given target for playback, using the DSP and mixer at other samperates is possible if the hardware offers them. Change-Id: I6023cf0c0baa8bc6292b6919b4dd3618a6a25622 Reviewed-on: http://gerrit.rockbox.org/479 Reviewed-by: Michael Sevakis <jethead71@rockbox.org> Tested-by: Michael Sevakis <jethead71@rockbox.org>
57 lines
2.4 KiB
C
57 lines
2.4 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 (C) 2012 Michael Sevakis
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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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/****************************************************************************
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* -_-~-_-~-_-~-_-~-_-~-_- Main database of effects _-~-_-~-_-~-_-~-_-~-_-~-
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*
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* Order is not particularly relevant and has no intended correlation with
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* IDs.
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*
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* Notable exceptions in ordering:
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* * Sample input: which is first in line and has special responsibilities
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* (not an effect per se).
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* * Anything that depends on the native sample rate must go after the
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* resampling stage.
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* * Some bizarre dependency I didn't think of but you decided to implement.
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* * Sample output: Naturally, this takes the final result and converts it
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* to the target PCM format (not an effect per se).
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*/
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DSP_PROC_DB_START
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DSP_PROC_DB_ITEM(MISC_HANDLER) /* misc stuff (null stage) */
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DSP_PROC_DB_ITEM(PGA) /* pre-gain amp */
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#ifdef HAVE_PITCHCONTROL
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DSP_PROC_DB_ITEM(TIMESTRETCH) /* time-stretching */
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#endif
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DSP_PROC_DB_ITEM(RESAMPLE) /* resampler providing output frequency */
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DSP_PROC_DB_ITEM(CROSSFEED) /* stereo crossfeed */
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DSP_PROC_DB_ITEM(EQUALIZER) /* n-band equalizer */
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#ifdef HAVE_SW_TONE_CONTROLS
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DSP_PROC_DB_ITEM(TONE_CONTROLS) /* bass and treble */
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#endif
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DSP_PROC_DB_ITEM(CHANNEL_MODE) /* channel modes */
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DSP_PROC_DB_ITEM(COMPRESSOR) /* dynamic-range compressor */
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DSP_PROC_DB_STOP
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/* This file is included multiple times with different macro definitions so
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clean up the current ones */
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#undef DSP_PROC_DB_START
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#undef DSP_PROC_DB_ITEM
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#undef DSP_PROC_DB_STOP
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