c9bcbe202d
Creates a standard buffer passing, local data passing and messaging system for processing stages. Stages can be moved to their own source files to reduce clutter and ease assimilation of new ones. dsp.c becomes dsp_core.c which supports an engine and framework for effects. Formats and change notifications are passed along with the buffer so that they arrive at the correct time at each stage in the chain regardless of the internal delays of a particular one. Removes restrictions on the number of samples that can be processed at a time and it pays attention to destination buffer size restrictions without having to limit input count, which also allows pcmbuf to remain fuller and safely set its own buffer limits as it sees fit. There is no longer a need to query input/output counts given a certain number of input samples; just give it the sizes of the source and destination buffers. Works in harmony with stages that are not deterministic in terms of sample input/output ratio (like both resamplers but most notably the timestretch). As a result it fixes quirks with timestretch hanging up with certain settings and it now operates properly throughout its full settings range. Change-Id: Ib206ec78f6f6c79259c5af9009fe021d68be9734 Reviewed-on: http://gerrit.rockbox.org/200 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_PITCHSCREEN
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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 NATIVE_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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