/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2005 by Miika Pekkarinen * * 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 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_MIX_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(void); size_t pcmbuf_init(unsigned char *bufend); /* Size in bytes used by the pcmbuffer */ size_t pcmbuf_get_bufsize(void); #ifdef ROCKBOX_HAS_LOGF /* just used for logging for now */ unsigned char * pcmbuf_get_meminfo(size_t *length); #endif 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) 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)); size_t pcmbuf_free(void); unsigned int pcmbuf_get_latency(void); void pcmbuf_set_low_latency(bool state); void * pcmbuf_request_buffer(int *count); void pcmbuf_write_complete(int count); void * pcmbuf_request_voice_buffer(int *count); void pcmbuf_write_voice_complete(int count); bool pcmbuf_is_crossfade_enabled(void); void pcmbuf_crossfade_enable(bool on_off); void pcmbuf_crossfade_enable_finished(void); int pcmbuf_usage(void); int pcmbuf_mix_free(void); void pcmbuf_beep(unsigned int frequency, size_t duration, int amplitude); int pcmbuf_used_descs(void); int pcmbuf_descs(void); void pcmbuf_play_remainder(void); void pcmbuf_flush_limiter_buffer(void); #endif