devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

pcmbuf: clarify and simplify crossfade code, etc.

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23538 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jeffrey Goode 2009-11-05 21:59:36 +00:00
parent 013fe35992
commit 04b01e1831
5 changed files with 180 additions and 181 deletions
Download patch file Download diff file Expand all files Collapse all files

75
apps/pcmbuf.h
View file

@ -21,58 +21,37 @@
#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);
/* playback */
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 long pcmbuf_get_latency(void);
void pcmbuf_set_low_latency(bool state);
void * pcmbuf_request_buffer(int *count);
void pcmbuf_play_stop(void);
void pcmbuf_pause(bool pause);
void pcmbuf_start_track_change(bool manual_skip);
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);
/* crossfade */
bool pcmbuf_is_crossfade_active(void);
void pcmbuf_request_crossfade_enable(bool on_off);
bool pcmbuf_is_same_size(void);
/* voice */
void *pcmbuf_request_voice_buffer(int *count);
void pcmbuf_write_voice_complete(int count);
/* debug menu, other metrics */
size_t pcmbuf_free(void);
size_t pcmbuf_get_bufsize(void);
int pcmbuf_descs(void);
int pcmbuf_used_descs(void);
#ifdef ROCKBOX_HAS_LOGF
unsigned char *pcmbuf_get_meminfo(size_t *length);
#endif
/* misc */
void pcmbuf_beep(unsigned int frequency, size_t duration, int amplitude);
bool pcmbuf_is_lowdata(void);
void pcmbuf_set_low_latency(bool state);
unsigned long pcmbuf_get_latency(void);
#endif