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rockbox/lib/rbcodec/dsp/tdspeed.h

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FS#8894 - Add time stretching feature to all SWCODEC targets - the current algorithm is best for spoken word. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21258 a1c6a512-1295-4272-9138-f99709370657
2009-06-12 07:20:50 +00:00
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Nicolas Pitre <nico@cam.org>
* Copyright (C) 2006-2007 by St<EFBFBD>phane Doyon <s.doyon@videotron.ca>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _TDSPEED_H
#define _TDSPEED_H
Fundamentally rewrite much of the audio DSP. 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>
2012-03-27 23:52:15 +00:00
/* some #define functions to get the pitch, stretch and speed values based
* upon two known values. Remember that params are alphabetical. */
Improvements to the pitch screen UI (FS#10359 by David Johnston) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21781 a1c6a512-1295-4272-9138-f99709370657
2009-07-11 16:46:19 +00:00
#define GET_SPEED(pitch, stretch) \
((pitch * stretch + PITCH_SPEED_100 / 2L) / PITCH_SPEED_100)
#define GET_PITCH(speed, stretch) \
((speed * PITCH_SPEED_100 + stretch / 2L) / stretch)
#define GET_STRETCH(pitch, speed) \
((speed * PITCH_SPEED_100 + pitch / 2L) / pitch)
#define STRETCH_MAX (250L * PITCH_SPEED_PRECISION) /* 250% */
#define STRETCH_MIN (35L * PITCH_SPEED_PRECISION) /* 35% */
FS#8894 - Add time stretching feature to all SWCODEC targets - the current algorithm is best for spoken word. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21258 a1c6a512-1295-4272-9138-f99709370657
2009-06-12 07:20:50 +00:00
Fundamentally rewrite much of the audio DSP. 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>
2012-03-27 23:52:15 +00:00
void dsp_timestretch_enable(bool enable);
void dsp_set_timestretch(int32_t percent);
int32_t dsp_get_timestretch(void);
bool dsp_timestretch_available(void);
rbcodec: abstract tdspeed buffer allocation Move code dealing with rockbox specific buflib allocations into a rockbox specific file and implement buffer allocation with malloc/free for warble/stand alone lib. Based on patch by Sean Bartell. Change-Id: I8cb85dad5890fbd34c1bb26abbb89c0b0f6b55cf Reviewed-on: http://gerrit.rockbox.org/144 Tested-by: Nils Wallménius <nils@rockbox.org> Reviewed-by: Michael Sevakis <jethead71@rockbox.org> Reviewed-by: Nils Wallménius <nils@rockbox.org>
2012-05-06 10:22:09 +00:00
void tdspeed_move(int i, void* current, void* new);
Fundamentally rewrite much of the audio DSP. 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>
2012-03-27 23:52:15 +00:00
#endif /* _TDSPEED_H */
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