baa070cca6
This enables the ability to allocate (and free) memory dynamically without fragmentation, through compaction. This means allocations can move and fragmentation be reduced. Most changes are preparing Rockbox for this, which many times means adding a move callback which can temporarily disable movement when the corresponding code is in a critical section. For now, the audio buffer allocation has a central role, because it's the one having allocated most. This buffer is able to shrink itself, for which it needs to stop playback for a very short moment. For this, audio_buffer_available() returns the size of the audio buffer which can possibly be used by other allocations because the audio buffer can shrink. lastfm scrobbling and timestretch can now be toggled at runtime without requiring a reboot. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30381 a1c6a512-1295-4272-9138-f99709370657
49 lines
1.9 KiB
C
49 lines
1.9 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) 2006 by Nicolas Pitre <nico@cam.org>
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* Copyright (C) 2006-2007 by Stéphane Doyon <s.doyon@videotron.ca>
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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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#ifndef _TDSPEED_H
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#define _TDSPEED_H
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#include "dsp.h"
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#define TDSPEED_OUTBUFSIZE 4096
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/* some #define functions to get the pitch, stretch and speed values based on */
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/* two known values. Remember that params are alphabetical. */
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#define GET_SPEED(pitch, stretch) \
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((pitch * stretch + PITCH_SPEED_100 / 2L) / PITCH_SPEED_100)
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#define GET_PITCH(speed, stretch) \
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((speed * PITCH_SPEED_100 + stretch / 2L) / stretch)
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#define GET_STRETCH(pitch, speed) \
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((speed * PITCH_SPEED_100 + pitch / 2L) / pitch)
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void tdspeed_init(void);
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void tdspeed_finish(void);
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bool tdspeed_config(int samplerate, bool stereo, int32_t factor);
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long tdspeed_est_output_size(void);
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long tdspeed_est_input_size(long size);
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int tdspeed_doit(int32_t *src[], int count);
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#define STRETCH_MAX (250L * PITCH_SPEED_PRECISION) /* 250% */
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#define STRETCH_MIN (35L * PITCH_SPEED_PRECISION) /* 35% */
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#endif
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