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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
#include "config.h"
#ifdef HAVE_SW_VOLUME_CONTROL
/* Default settings - architecture may have other optimal values */
#ifndef PCM_SW_VOLUME_FRACBITS
/* Allows -73 to +6dB gain, sans large integer math */
#define PCM_SW_VOLUME_FRACBITS (15)
#endif
/* Constants selected based on integer math overflow avoidance */
#if PCM_SW_VOLUME_FRACBITS <= 16
#define PCM_FACTOR_MAX 0x00010000u
#define PCM_FACTOR_UNITY (1u << PCM_SW_VOLUME_FRACBITS)
#elif PCM_SW_VOLUME_FRACBITS <= 31
#define PCM_FACTOR_MAX 0x80000000u
#define PCM_FACTOR_UNITY (1u << PCM_SW_VOLUME_FRACBITS)
#endif /* PCM_SW_VOLUME_FRACBITS */
#ifdef PCM_SW_VOLUME_UNBUFFERED
/* Copies buffer with volume scaling applied */
void pcm_sw_volume_copy_buffer(void *dst, const void *src, size_t size);
#define pcm_copy_buffer pcm_sw_volume_copy_buffer
#else /* !PCM_SW_VOLUME_UNBUFFERED */
#ifdef HAVE_SDL_AUDIO
#define pcm_copy_buffer memcpy
#endif
#ifndef PCM_PLAY_DBL_BUF_SAMPLES
#define PCM_PLAY_DBL_BUF_SAMPLES 1024 /* Max 4KByte chunks */
#endif
#ifndef PCM_DBL_BUF_BSS
#define PCM_DBL_BUF_BSS /* In DRAM, uncached may be better */
#endif
#endif /* PCM_SW_VOLUME_UNBUFFERED */
void pcm_sync_pcm_factors(void);
#endif /* HAVE_SW_VOLUME_CONTROL */
#define PCM_SAMPLE_SIZE (2 * sizeof (int16_t))
/* Cheapo buffer align macro to align to the 16-16 PCM size */
#define ALIGN_AUDIOBUF(start, size) \
({ (start) = (void *)(((uintptr_t)(start) + 3) & ~3); \
(size) &= ~3; })
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 **/
/* Call registered callback to obtain next buffer */
static inline bool pcm_get_more_int(const void **addr, size_t *size)
{
extern volatile pcm_play_callback_type pcm_callback_for_more;
pcm_play_callback_type get_more = pcm_callback_for_more;
if (UNLIKELY(!get_more))
return false;
*addr = NULL;
*size = 0;
get_more(addr, size);
ALIGN_AUDIOBUF(*addr, *size);
return *addr && *size;
}
static FORCE_INLINE enum pcm_dma_status pcm_call_status_cb(
pcm_status_callback_type callback, enum pcm_dma_status status)
{
if (!callback)
return status;
return callback(status);
}
static FORCE_INLINE enum pcm_dma_status pcm_play_call_status_cb(
enum pcm_dma_status status)
{
extern enum pcm_dma_status
(* volatile pcm_play_status_callback)(enum pcm_dma_status);
return pcm_call_status_cb(pcm_play_status_callback, status);
}
static FORCE_INLINE enum pcm_dma_status
pcm_play_dma_status_callback(enum pcm_dma_status status)
{
#if defined(HAVE_SW_VOLUME_CONTROL) && !defined(PCM_SW_VOLUME_UNBUFFERED)
extern enum pcm_dma_status
pcm_play_dma_status_callback_int(enum pcm_dma_status status);
return pcm_play_dma_status_callback_int(status);
#else
return pcm_play_call_status_cb(status);
#endif /* HAVE_SW_VOLUME_CONTROL && !PCM_SW_VOLUME_UNBUFFERED */
}
#if defined(HAVE_SW_VOLUME_CONTROL) && !defined(PCM_SW_VOLUME_UNBUFFERED)
void pcm_play_dma_start_int(const void *addr, size_t size);
void pcm_play_dma_pause_int(bool pause);
void pcm_play_dma_stop_int(void);
void pcm_play_stop_int(void);
const void *pcm_play_dma_get_peak_buffer_int(int *count);
#endif /* HAVE_SW_VOLUME_CONTROL && !PCM_SW_VOLUME_UNBUFFERED */
/* Called by the bottom layer ISR when more data is needed. Returns true
* if a new buffer is available, false otherwise. */
bool pcm_play_dma_complete_callback(enum pcm_dma_status status,
const void **addr, size_t *size);
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_postinit(void);
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_stop(void);
const void * pcm_rec_dma_get_peak_buffer(void);
static FORCE_INLINE enum pcm_dma_status
pcm_rec_dma_status_callback(enum pcm_dma_status status)
{
extern enum pcm_dma_status
(* volatile pcm_rec_status_callback)(enum pcm_dma_status);
return pcm_call_status_cb(pcm_rec_status_callback, status);
}
/* Called by the bottom layer ISR when more data is needed. Returns true
* if a new buffer is available, false otherwise. */
bool pcm_rec_dma_complete_callback(enum pcm_dma_status status,
void **addr, size_t *size);
#ifdef HAVE_PCM_REC_DMA_ADDRESS
#define pcm_rec_dma_addr(addr) pcm_dma_addr(addr)
#else
#define pcm_rec_dma_addr(addr) addr
#endif
#endif /* HAVE_RECORDING */
#endif /* PCM_INTERNAL_H */
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