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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Linus Nielsen Feltzing
* Copyright (C) 2011 by Michael Sevakis
*
* 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 PCM_INTERNAL_H
#define PCM_INTERNAL_H
struct pcm_peaks
{
long period;
long tick;
uint16_t val[2];
};
void pcm_do_peak_calculation(struct pcm_peaks *peaks, bool active,
const void *addr, int count);
/** The following are for internal use between pcm.c and target-
specific portion **/
/* Called by the bottom layer ISR when more data is needed. Returns non-
* zero size if more data is to be played. Setting start to NULL
* forces stop. */
void pcm_play_get_more_callback(void **start, size_t *size);
/* Called by the bottom layer ISR after next transfer has begun in order
to fill more data for next "get more" callback to implement double-buffered
callbacks - except for a couple ASM handlers, help drivers to implement
this functionality with minimal overhead */
static FORCE_INLINE void pcm_play_dma_started_callback(void)
{
extern void (* pcm_play_dma_started)(void);
void (* callback)(void) = pcm_play_dma_started;
if (callback)
callback();
}
extern unsigned long pcm_curr_sampr;
extern unsigned long pcm_sampr;
extern int pcm_fsel;
#ifdef HAVE_PCM_DMA_ADDRESS
void * pcm_dma_addr(void *addr);
#endif
extern volatile bool pcm_playing;
extern volatile bool pcm_paused;
void pcm_play_dma_lock(void);
void pcm_play_dma_unlock(void);
void pcm_play_dma_init(void) INIT_ATTR;
void pcm_play_dma_start(const void *addr, size_t size);
void pcm_play_dma_stop(void);
void pcm_play_dma_pause(bool pause);
const void * pcm_play_dma_get_peak_buffer(int *count);
void pcm_dma_apply_settings(void);
#ifdef HAVE_RECORDING
/* DMA transfer in is currently active */
extern volatile bool pcm_recording;
/* APIs implemented in the target-specific portion */
void pcm_rec_dma_init(void);
void pcm_rec_dma_close(void);
void pcm_rec_dma_start(void *addr, size_t size);
void pcm_rec_dma_record_more(void *start, size_t size);
void pcm_rec_dma_stop(void);
const void * pcm_rec_dma_get_peak_buffer(void);
#endif /* HAVE_RECORDING */
#endif /* PCM_INTERNAL_H */
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