blob: b659e8fa4e84dee4ac7301d30f63e0450c6beb6f [file] [log] [blame]
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Miika Pekkarinen
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef PCMBUF_H
#define PCMBUF_H
#define PCMBUF_TARGET_CHUNK 32768 /* This is the target fill size of chunks
on the pcm buffer */
#define PCMBUF_MINAVG_CHUNK 24576 /* This is the minimum average size of
chunks on the pcm buffer (or we run out
of buffer descriptors, which is
non-fatal) */
#define PCMBUF_MIN_CHUNK 4096 /* We try to never feed a chunk smaller than
this to the DMA */
#define PCMBUF_FADE_CHUNK 8192 /* This is the maximum size of one packet
for mixing (crossfade or voice) */
/* Returns true if the buffer needs to change size */
bool pcmbuf_is_same_size(size_t bufsize);
void pcmbuf_init(size_t bufsize);
/* Size in bytes used by the pcmbuffer */
size_t pcmbuf_get_bufsize(void);
size_t get_pcmbuf_descsize(void);
void pcmbuf_pause(bool pause);
void pcmbuf_play_stop(void);
bool pcmbuf_is_crossfade_active(void);
/* These functions are for playing chained buffers of PCM data */
#if defined(HAVE_ADJUSTABLE_CPU_FREQ) && !defined(SIMULATOR)
void pcmbuf_boost(bool state);
void pcmbuf_set_boost_mode(bool state);
#else
#define pcmbuf_boost(state) do { } while(0)
#define pcmbuf_set_boost_mode(state) do { } while(0)
#endif
bool pcmbuf_is_lowdata(void);
void pcmbuf_play_start(void);
bool pcmbuf_crossfade_init(bool manual_skip);
void pcmbuf_set_event_handler(void (*callback)(void));
void pcmbuf_set_position_callback(void (*callback)(size_t size));
unsigned int pcmbuf_get_latency(void);
void pcmbuf_set_low_latency(bool state);
bool pcmbuf_insert_buffer(const char *buf, size_t length);
void pcmbuf_write_complete(size_t length);
void* pcmbuf_request_buffer(size_t length, size_t *realsize);
void* pcmbuf_request_voice_buffer(size_t length, size_t *realsize, bool mix);
bool pcmbuf_is_crossfade_enabled(void);
void pcmbuf_crossfade_enable(bool on_off);
int pcmbuf_usage(void);
int pcmbuf_mix_usage(void);
void pcmbuf_beep(unsigned int frequency, size_t duration, int amplitude);
void pcmbuf_reset_mixpos(void);
void pcmbuf_mix(char *buf, size_t length);
int pcmbuf_used_descs(void);
int pcmbuf_descs(void);
#endif