4db3e89652
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30403 a1c6a512-1295-4272-9138-f99709370657
92 lines
3 KiB
C
92 lines
3 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 Linus Nielsen Feltzing
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* Copyright (C) 2011 by 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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#ifndef PCM_INTERNAL_H
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#define PCM_INTERNAL_H
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struct pcm_peaks
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{
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long period;
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long tick;
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uint16_t val[2];
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};
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void pcm_do_peak_calculation(struct pcm_peaks *peaks, bool active,
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const void *addr, int count);
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/** The following are for internal use between pcm.c and target-
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specific portion **/
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/* Called by the bottom layer ISR when more data is needed. Returns non-
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* zero size if more data is to be played. Setting start to NULL
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* forces stop. */
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void pcm_play_get_more_callback(void **start, size_t *size);
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/* Called by the bottom layer ISR after next transfer has begun in order
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to fill more data for next "get more" callback to implement double-buffered
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callbacks - except for a couple ASM handlers, help drivers to implement
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this functionality with minimal overhead */
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static FORCE_INLINE void pcm_play_dma_started_callback(void)
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{
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extern void (* pcm_play_dma_started)(void);
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void (* callback)(void) = pcm_play_dma_started;
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if (callback)
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callback();
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}
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extern unsigned long pcm_curr_sampr;
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extern unsigned long pcm_sampr;
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extern int pcm_fsel;
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#ifdef HAVE_PCM_DMA_ADDRESS
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void * pcm_dma_addr(void *addr);
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#endif
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extern volatile bool pcm_playing;
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extern volatile bool pcm_paused;
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void pcm_play_dma_lock(void);
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void pcm_play_dma_unlock(void);
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void pcm_play_dma_init(void) INIT_ATTR;
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void pcm_play_dma_postinit(void);
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void pcm_play_dma_start(const void *addr, size_t size);
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void pcm_play_dma_stop(void);
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void pcm_play_dma_pause(bool pause);
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const void * pcm_play_dma_get_peak_buffer(int *count);
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void pcm_dma_apply_settings(void);
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#ifdef HAVE_RECORDING
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/* DMA transfer in is currently active */
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extern volatile bool pcm_recording;
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/* APIs implemented in the target-specific portion */
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void pcm_rec_dma_init(void);
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void pcm_rec_dma_close(void);
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void pcm_rec_dma_start(void *addr, size_t size);
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void pcm_rec_dma_record_more(void *start, size_t size);
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void pcm_rec_dma_stop(void);
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const void * pcm_rec_dma_get_peak_buffer(void);
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#endif /* HAVE_RECORDING */
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#endif /* PCM_INTERNAL_H */
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