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>
87 lines
2.8 KiB
C
87 lines
2.8 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) 2005 by Miika Pekkarinen
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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 PCMBUF_H
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#define PCMBUF_H
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#include <sys/types.h>
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/* Commit PCM data */
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void *pcmbuf_request_buffer(int *count);
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void pcmbuf_write_complete(int count, unsigned long elapsed, off_t offset);
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/* Init */
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size_t pcmbuf_init(void *bufend);
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/* Playback */
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void pcmbuf_play_start(void);
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void pcmbuf_play_stop(void);
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void pcmbuf_pause(bool pause);
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/* Track change */
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/* Track change origin type */
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enum pcm_track_change_type
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{
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TRACK_CHANGE_NONE = 0, /* No track change pending */
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TRACK_CHANGE_MANUAL, /* Manual change (from user) */
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TRACK_CHANGE_AUTO, /* Automatic change (from codec) */
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TRACK_CHANGE_END_OF_DATA, /* Expect no more data (from codec) */
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};
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void pcmbuf_monitor_track_change(bool monitor);
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void pcmbuf_start_track_change(enum pcm_track_change_type type);
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/* Crossfade */
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#ifdef HAVE_CROSSFADE
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bool pcmbuf_is_crossfade_active(void);
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void pcmbuf_request_crossfade_enable(int setting);
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bool pcmbuf_is_same_size(void);
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#else
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/* Dummy functions with sensible returns */
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static FORCE_INLINE bool pcmbuf_is_crossfade_active(void)
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{ return false; }
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static FORCE_INLINE void pcmbuf_request_crossfade_enable(bool on_off)
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{ return; (void)on_off; }
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static FORCE_INLINE bool pcmbuf_is_same_size(void)
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{ return true; }
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#endif
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/* Debug menu, other metrics */
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size_t pcmbuf_free(void);
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size_t pcmbuf_get_bufsize(void);
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int pcmbuf_used_descs(void);
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int pcmbuf_descs(void);
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/* Fading and channel volume control */
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void pcmbuf_fade(bool fade, bool in);
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bool pcmbuf_fading(void);
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void pcmbuf_soft_mode(bool shhh);
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/* Time and position */
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unsigned int pcmbuf_get_position_key(void);
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void pcmbuf_sync_position_update(void);
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/* Misc */
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bool pcmbuf_is_lowdata(void);
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void pcmbuf_set_low_latency(bool state);
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void pcmbuf_update_frequency(void);
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unsigned int pcmbuf_get_frequency(void);
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#endif /* PCMBUF_H */
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