| /*************************************************************************** |
| * __________ __ ___. |
| * 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_start_track_change(void); |
| 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); |
| |
| #endif |