fe2d52cc7d
Nothing in the core has used it for some time. It's exported to the plugin API but the last plugins to use it were switched to the mixer API back in 2011. This allows us to get rid of pcm_play_dma_pause() from all audio drivers Change-Id: Ic3fa02592316f84963e41d792d1cabb436d1ff6b
187 lines
6.1 KiB
C
187 lines
6.1 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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#include "config.h"
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#ifdef HAVE_SW_VOLUME_CONTROL
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/* Default settings - architecture may have other optimal values */
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#ifndef PCM_SW_VOLUME_FRACBITS
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/* Allows -73 to +6dB gain, sans large integer math */
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#define PCM_SW_VOLUME_FRACBITS (15)
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#endif
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/* Constants selected based on integer math overflow avoidance */
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#if PCM_SW_VOLUME_FRACBITS <= 16
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#define PCM_FACTOR_MAX 0x00010000u
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#define PCM_FACTOR_UNITY (1u << PCM_SW_VOLUME_FRACBITS)
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#elif PCM_SW_VOLUME_FRACBITS <= 31
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#define PCM_FACTOR_MAX 0x80000000u
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#define PCM_FACTOR_UNITY (1u << PCM_SW_VOLUME_FRACBITS)
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#endif /* PCM_SW_VOLUME_FRACBITS */
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#ifdef PCM_SW_VOLUME_UNBUFFERED
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/* Copies buffer with volume scaling applied */
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void pcm_sw_volume_copy_buffer(void *dst, const void *src, size_t size);
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#define pcm_copy_buffer pcm_sw_volume_copy_buffer
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#else /* !PCM_SW_VOLUME_UNBUFFERED */
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#ifdef HAVE_SDL_AUDIO
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#define pcm_copy_buffer memcpy
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#endif
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#ifndef PCM_PLAY_DBL_BUF_SAMPLES
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#define PCM_PLAY_DBL_BUF_SAMPLES 1024 /* Max 4KByte chunks */
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#endif
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#ifndef PCM_DBL_BUF_BSS
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#define PCM_DBL_BUF_BSS /* In DRAM, uncached may be better */
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#endif
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#endif /* PCM_SW_VOLUME_UNBUFFERED */
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void pcm_sync_pcm_factors(void);
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#endif /* HAVE_SW_VOLUME_CONTROL */
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#define PCM_SAMPLE_SIZE (2 * sizeof (int16_t))
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/* Cheapo buffer align macro to align to the 16-16 PCM size */
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#define ALIGN_AUDIOBUF(start, size) \
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({ (start) = (void *)(((uintptr_t)(start) + 3) & ~3); \
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(size) &= ~3; })
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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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/* Call registered callback to obtain next buffer */
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static inline bool pcm_get_more_int(const void **addr, size_t *size)
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{
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extern volatile pcm_play_callback_type pcm_callback_for_more;
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pcm_play_callback_type get_more = pcm_callback_for_more;
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if (UNLIKELY(!get_more))
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return false;
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*addr = NULL;
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*size = 0;
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get_more(addr, size);
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ALIGN_AUDIOBUF(*addr, *size);
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return *addr && *size;
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}
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static FORCE_INLINE enum pcm_dma_status pcm_call_status_cb(
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pcm_status_callback_type callback, enum pcm_dma_status status)
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{
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if (!callback)
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return status;
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return callback(status);
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}
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static FORCE_INLINE enum pcm_dma_status pcm_play_call_status_cb(
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enum pcm_dma_status status)
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{
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extern enum pcm_dma_status
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(* volatile pcm_play_status_callback)(enum pcm_dma_status);
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return pcm_call_status_cb(pcm_play_status_callback, status);
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}
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static FORCE_INLINE enum pcm_dma_status
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pcm_play_dma_status_callback(enum pcm_dma_status status)
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{
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#if defined(HAVE_SW_VOLUME_CONTROL) && !defined(PCM_SW_VOLUME_UNBUFFERED)
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extern enum pcm_dma_status
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pcm_play_dma_status_callback_int(enum pcm_dma_status status);
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return pcm_play_dma_status_callback_int(status);
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#else
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return pcm_play_call_status_cb(status);
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#endif /* HAVE_SW_VOLUME_CONTROL && !PCM_SW_VOLUME_UNBUFFERED */
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}
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#if defined(HAVE_SW_VOLUME_CONTROL) && !defined(PCM_SW_VOLUME_UNBUFFERED)
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void pcm_play_dma_start_int(const void *addr, size_t size);
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void pcm_play_dma_stop_int(void);
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void pcm_play_stop_int(void);
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const void *pcm_play_dma_get_peak_buffer_int(int *count);
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#endif /* HAVE_SW_VOLUME_CONTROL && !PCM_SW_VOLUME_UNBUFFERED */
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/* Called by the bottom layer ISR when more data is needed. Returns true
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* if a new buffer is available, false otherwise. */
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bool pcm_play_dma_complete_callback(enum pcm_dma_status status,
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const void **addr, size_t *size);
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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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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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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_stop(void);
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const void * pcm_rec_dma_get_peak_buffer(void);
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static FORCE_INLINE enum pcm_dma_status
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pcm_rec_dma_status_callback(enum pcm_dma_status status)
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{
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extern enum pcm_dma_status
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(* volatile pcm_rec_status_callback)(enum pcm_dma_status);
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return pcm_call_status_cb(pcm_rec_status_callback, status);
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}
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/* Called by the bottom layer ISR when more data is needed. Returns true
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* if a new buffer is available, false otherwise. */
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bool pcm_rec_dma_complete_callback(enum pcm_dma_status status,
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void **addr, size_t *size);
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#ifdef HAVE_PCM_REC_DMA_ADDRESS
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#define pcm_rec_dma_addr(addr) pcm_dma_addr(addr)
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#else
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#define pcm_rec_dma_addr(addr) addr
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#endif
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#endif /* HAVE_RECORDING */
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#endif /* PCM_INTERNAL_H */
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