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ea570c5728
* pcm_play_data * pcm_play_stop * pcm_play_stop_int * pcm_is_playing * pcm_set_frequency * pcm_get_frequency * pcm_apply_settings Now, the only user of these functions are the mixer and recording layers that provide a higher-level API to plugins and the main [playback] application. Outside of the PCM core, pcm_apply_settings() was only used immediately following a call to mixer_set_frequency(), so the latter function now always calls the former. Change-Id: I61c3144dc156b9de9b7963160b525c6d10c6ad4b
112 lines
3.5 KiB
C
112 lines
3.5 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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*
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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_PLAYBACK_H
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#define PCM_PLAYBACK_H
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#include <string.h> /* size_t */
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#include <inttypes.h> /* uint32_t */
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#include <stdbool.h>
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#include "config.h"
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enum pcm_dma_status
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{
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#ifdef HAVE_SPDIF_REC
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PCM_DMAST_ERR_SPDIF = -2,
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#endif
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PCM_DMAST_ERR_DMA = -1,
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PCM_DMAST_OK = 0,
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PCM_DMAST_STARTED = 1,
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};
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/** RAW PCM routines used with playback and recording **/
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/* Typedef for registered data callback */
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typedef void (*pcm_play_callback_type)(const void **start, size_t *size);
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/* Typedef for registered status callback */
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typedef enum pcm_dma_status (*pcm_status_callback_type)(enum pcm_dma_status status);
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/* set the pcm frequency - use values in hw_sampr_list
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* when CONFIG_SAMPR_TYPES is #defined, or-in SAMPR_TYPE_* fields with
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* frequency value. SAMPR_TYPE_PLAY is 0 and the default if none is
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* specified. */
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#ifdef CONFIG_SAMPR_TYPES
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#ifdef SAMPR_TYPE_REC
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unsigned int pcm_sampr_type_rec_to_play(unsigned int samplerate);
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#endif
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#endif /* CONFIG_SAMPR_TYPES */
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/* Reenterable locks for locking and unlocking the playback interrupt */
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void pcm_play_lock(void);
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void pcm_play_unlock(void);
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void pcm_init(void) INIT_ATTR;
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void pcm_postinit(void);
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bool pcm_is_initialized(void);
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enum pcm_sink_ids pcm_current_sink(void);
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const struct pcm_sink_caps* pcm_sink_caps(enum pcm_sink_ids sink);
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/* shortcut for plugins */
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const struct pcm_sink_caps* pcm_current_sink_caps(void);
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/* Kept internally for global PCM and used by mixer's verion of peak
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calculation */
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struct pcm_peaks
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{
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uint32_t left; /* Left peak value */
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uint32_t right; /* Right peak value */
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long period; /* For tracking calling period */
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long tick; /* Last tick called */
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};
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#ifdef HAVE_RECORDING
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/** RAW PCM recording routines **/
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/* Typedef for registered data callback */
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typedef void (*pcm_rec_callback_type)(void **start, size_t *size);
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/* Reenterable locks for locking and unlocking the recording interrupt */
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void pcm_rec_lock(void);
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void pcm_rec_unlock(void);
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/* Initialize pcm recording interface */
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void pcm_init_recording(void);
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/* Uninitialize pcm recording interface */
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void pcm_close_recording(void);
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/* Start recording "raw" PCM data */
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void pcm_record_data(pcm_rec_callback_type more_ready,
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pcm_status_callback_type status_cb,
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void *start, size_t size);
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/* Stop tranferring data into supplied buffer */
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void pcm_stop_recording(void);
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/* Is pcm currently recording? */
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bool pcm_is_recording(void);
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void pcm_calculate_rec_peaks(int *left, int *right);
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#endif /* HAVE_RECORDING */
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#endif /* PCM_PLAYBACK_H */
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