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rockbox/apps/codecs.h
Dave Chapman 77bf6bf370 iPod: current_tick is now a variable, so we can export it via the plugin and codec APIs 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8225 a1c6a512-1295-4272-9138-f99709370657
2005-12-12 14:05:14 +00:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Björn Stenberg
*
* 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 _CODECS_H_
#define _CODECS_H_
/* instruct simulator code to not redefine any symbols when compiling codecs.
(the CODEC macro is defined in apps/codecs/Makefile) */
#ifdef CODEC
#define NO_REDEFINES_PLEASE
#endif
#ifndef MEM
#define MEM 2
#endif
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include "config.h"
#include "dir.h"
#include "kernel.h"
#include "button.h"
#include "font.h"
#include "system.h"
#include "id3.h"
#include "mpeg.h"
#include "audio.h"
#include "mp3_playback.h"
#if (CONFIG_CODEC == SWCODEC)
#include "dsp.h"
#include "pcm_playback.h"
#include "playback.h"
#endif
#include "settings.h"
#include "thread.h"
#include "playlist.h"
#include "sound.h"
#ifdef CODEC
#if defined(DEBUG) || defined(SIMULATOR)
#undef DEBUGF
#define DEBUGF rb->debugf
#undef LDEBUGF
#define LDEBUGF rb->debugf
#else
#define DEBUGF(...)
#define LDEBUGF(...)
#endif
#ifdef ROCKBOX_HAS_LOGF
#undef LOGF
#define LOGF rb->logf
#else
#define LOGF(...)
#endif
#endif
#ifdef SIMULATOR
#define PREFIX(_x_) sim_ ## _x_
#else
#define PREFIX(_x_) _x_
#endif
/* increase this every time the api struct changes */
#define CODEC_API_VERSION 44
/* update this to latest version if a change to the api struct breaks
backwards compatibility (and please take the opportunity to sort in any
new function which are "waiting" at the end of the function table) */
#define CODEC_MIN_API_VERSION 44
/* codec return codes */
enum codec_status {
CODEC_OK = 0,
CODEC_USB_CONNECTED,
CODEC_WRONG_API_VERSION = -1,
CODEC_WRONG_MODEL = -2,
CODEC_ERROR = -3,
};
/* compatibility test macro */
#define TEST_CODEC_API(_api_) \
do { \
int _rc_ = _api_->codec_test(CODEC_API_VERSION, 1, MEM); \
if (_rc_<0) \
return _rc_; \
} while(0)
/* NOTE: To support backwards compatibility, only add new functions at
the end of the structure. Every time you add a new function,
remember to increase CODEC_API_VERSION. If you make changes to the
existing APIs then also update CODEC_MIN_API_VERSION to current
version
*/
struct codec_api {
/* these two fields must always be first, to ensure
TEST_CODEC_API will always work */
int version;
int (*codec_test)(int api_version, int model, int memsize);
off_t filesize; /* Total file length */
off_t curpos; /* Current buffer position */
/* For gapless mp3 */
struct mp3entry *id3; /* TAG metadata pointer */
bool *taginfo_ready; /* Is metadata read */
/* Codec should periodically check if stop_codec is set to true.
In case it's, codec must return with PLUGIN_OK status immediately. */
bool stop_codec;
/* Codec should periodically check if reload_codec is set to true.
In case it's, codec should reload itself without exiting. */
bool reload_codec;
/* If seek_time != 0, codec should seek to that song position (in ms)
if codec supports seeking. */
int seek_time;
/* Returns buffer to malloc array. Only codeclib should need this. */
void* (*get_codec_memory)(long *size);
/* Insert PCM data into audio buffer for playback. Playback will start
automatically. */
bool (*pcmbuf_insert)(char *data, long length);
bool (*pcmbuf_insert_split)(void *ch1, void *ch2, long length);
/* Set song position in WPS (value in ms). */
void (*set_elapsed)(unsigned int value);
/* Read next <size> amount bytes from file buffer to <ptr>.
Will return number of bytes read or 0 if end of file. */
long (*read_filebuf)(void *ptr, long size);
/* Request pointer to file buffer which can be used to read
<realsize> amount of data. <reqsize> tells the buffer system
how much data it should try to allocate. If <realsize> is 0,
end of file is reached. */
void* (*request_buffer)(long *realsize, long reqsize);
/* Advance file buffer position by <amount> amount of bytes. */
void (*advance_buffer)(long amount);
/* Advance file buffer to a pointer location inside file buffer. */
void (*advance_buffer_loc)(void *ptr);
/* Seek file buffer to position <newpos> beginning of file. */
bool (*seek_buffer)(off_t newpos);
/* Calculate mp3 seek position from given time data in ms. */
off_t (*mp3_get_filepos)(int newtime);
/* Request file change from file buffer. Returns true is next
track is available and changed. If return value is false,
codec should exit immediately with PLUGIN_OK status. */
bool (*request_next_track)(void);
/* Configure different codec buffer parameters. */
void (*configure)(int setting, void *value);
void (*splash)(int ticks, bool center, const unsigned char *fmt, ...);
/* file */
int (*PREFIX(open))(const char* pathname, int flags);
int (*close)(int fd);
ssize_t (*read)(int fd, void* buf, size_t count);
off_t (*PREFIX(lseek))(int fd, off_t offset, int whence);
int (*PREFIX(creat))(const char *pathname, mode_t mode);
ssize_t (*write)(int fd, const void* buf, size_t count);
int (*PREFIX(remove))(const char* pathname);
int (*PREFIX(rename))(const char* path, const char* newname);
int (*PREFIX(ftruncate))(int fd, off_t length);
int (*fdprintf)(int fd, const char *fmt, ...);
int (*read_line)(int fd, char* buffer, int buffer_size);
bool (*settings_parseline)(char* line, char** name, char** value);
#ifndef SIMULATOR
void (*ata_sleep)(void);
#endif
/* dir */
DIR* (*PREFIX(opendir))(const char* name);
int (*PREFIX(closedir))(DIR* dir);
struct dirent* (*PREFIX(readdir))(DIR* dir);
int (*PREFIX(mkdir))(const char *name, int mode);
/* kernel/ system */
void (*PREFIX(sleep))(int ticks);
void (*yield)(void);
long* current_tick;
long (*default_event_handler)(long event);
long (*default_event_handler_ex)(long event, void (*callback)(void *), void *parameter);
int (*create_thread)(void (*function)(void), void* stack, int stack_size, const char *name);
void (*remove_thread)(int threadnum);
void (*reset_poweroff_timer)(void);
#ifndef SIMULATOR
int (*system_memory_guard)(int newmode);
long *cpu_frequency;
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
void (*cpu_boost)(bool on_off);
#endif
#endif
/* strings and memory */
int (*snprintf)(char *buf, size_t size, const char *fmt, ...);
char* (*strcpy)(char *dst, const char *src);
char* (*strncpy)(char *dst, const char *src, size_t length);
size_t (*strlen)(const char *str);
char * (*strrchr)(const char *s, int c);
int (*strcmp)(const char *, const char *);
int (*strcasecmp)(const char *, const char *);
int (*strncasecmp)(const char *s1, const char *s2, size_t n);
void* (*memset)(void *dst, int c, size_t length);
void* (*memcpy)(void *out, const void *in, size_t n);
const char *_ctype_;
int (*atoi)(const char *str);
char *(*strchr)(const char *s, int c);
char *(*strcat)(char *s1, const char *s2);
int (*memcmp)(const void *s1, const void *s2, size_t n);
char *(*strcasestr) (const char* phaystack, const char* pneedle);
/* sound */
void (*sound_set)(int setting, int value);
#ifndef SIMULATOR
void (*mp3_play_data)(const unsigned char* start, int size, void (*get_more)(unsigned char** start, int* size));
void (*mp3_play_pause)(bool play);
void (*mp3_play_stop)(void);
bool (*mp3_is_playing)(void);
#if CONFIG_CODEC != SWCODEC
void (*bitswap)(unsigned char *data, int length);
#endif
#if CONFIG_CODEC == SWCODEC
void (*pcm_play_data)(void (*get_more)(unsigned char** start, long*size));
void (*pcm_play_stop)(void);
void (*pcm_set_frequency)(unsigned int frequency);
bool (*pcm_is_playing)(void);
void (*pcm_play_pause)(bool play);
#endif
#endif /* !SIMULATOR */
/* playback control */
void (*PREFIX(audio_play))(int offset);
void (*audio_stop)(void);
void (*audio_pause)(void);
void (*audio_resume)(void);
void (*audio_next)(void);
void (*audio_prev)(void);
void (*audio_ff_rewind)(int newtime);
struct mp3entry* (*audio_next_track)(void);
int (*playlist_amount)(void);
int (*audio_status)(void);
bool (*audio_has_changed_track)(void);
struct mp3entry* (*audio_current_track)(void);
void (*audio_flush_and_reload_tracks)(void);
int (*audio_get_file_pos)(void);
#if !defined(SIMULATOR) && (CONFIG_CODEC != SWCODEC)
unsigned long (*mpeg_get_last_header)(void);
#endif
#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
void (*sound_set_pitch)(int pitch);
#endif
/* MAS communication */
#if !defined(SIMULATOR) && (CONFIG_CODEC != SWCODEC)
int (*mas_readmem)(int bank, int addr, unsigned long* dest, int len);
int (*mas_writemem)(int bank, int addr, const unsigned long* src, int len);
int (*mas_readreg)(int reg);
int (*mas_writereg)(int reg, unsigned int val);
#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
int (*mas_codec_writereg)(int reg, unsigned int val);
int (*mas_codec_readreg)(int reg);
#endif
#endif
/* tag database */
struct tagdb_header *tagdbheader;
int *tagdb_fd;
int *tagdb_initialized;
int (*tagdb_init) (void);
/* misc */
void (*srand)(unsigned int seed);
int (*rand)(void);
void (*qsort)(void *base, size_t nmemb, size_t size,
int(*compar)(const void *, const void *));
int (*kbd_input)(char* buffer, int buflen);
struct tm* (*get_time)(void);
int (*set_time)(const struct tm *tm);
void* (*plugin_get_audio_buffer)(int* buffer_size);
#if defined(DEBUG) || defined(SIMULATOR)
void (*debugf)(const char *fmt, ...);
#endif
struct user_settings* global_settings;
bool (*mp3info)(struct mp3entry *entry, const char *filename, bool v1first);
int (*count_mp3_frames)(int fd, int startpos, int filesize,
void (*progressfunc)(int));
int (*create_xing_header)(int fd, long startpos, long filesize,
unsigned char *buf, unsigned long num_frames,
unsigned long rec_time, unsigned long header_template,
void (*progressfunc)(int), bool generate_toc);
unsigned long (*find_next_frame)(int fd, long *offset,
long max_offset, unsigned long last_header);
int (*battery_level)(void);
bool (*battery_level_safe)(void);
#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
unsigned short (*peak_meter_scale_value)(unsigned short val,
int meterwidth);
void (*peak_meter_set_use_dbfs)(bool use);
bool (*peak_meter_get_use_dbfs)(void);
#endif
/* new stuff at the end, sort into place next time
the API gets incompatible */
#ifdef ROCKBOX_HAS_LOGF
void (*logf)(const char *fmt, ...);
#endif
void *(*memchr)(const void *s1, int c, size_t n);
void (*set_offset)(unsigned int value);
/* Codec should call this function when it has done the seeking. */
void (*seek_complete)(void);
};
/* defined by the codec loader (codec.c) */
#if CONFIG_CODEC == SWCODEC
int codec_load_ram(char* codecptr, int size, void* ptr2, int bufwrap,
struct codec_api *api);
int codec_load_file(const char* codec, struct codec_api *api);
#endif
/* defined by the codec */
enum codec_status codec_start(struct codec_api* rockbox)
__attribute__ ((section (".entry")));
#endif
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