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rockbox/apps/codecs.h
Steve Bavin c9df8fd87b The const police raid playback.c, should be no change to behaviour. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16860 a1c6a512-1295-4272-9138-f99709370657
2008-03-28 11:24:24 +00:00

320 lines
11 KiB
C
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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 <stdlib.h>
#include "config.h"
#include "kernel.h"
#include "system.h"
#include "id3.h"
#include "audio.h"
#ifdef RB_PROFILE
#include "profile.h"
#include "thread.h"
#endif
#if (CONFIG_CODEC == SWCODEC)
#if !defined(SIMULATOR) && defined(HAVE_RECORDING)
#include "pcm_record.h"
#endif
#include "dsp.h"
#endif
#include "settings.h"
#ifdef CODEC
#if defined(DEBUG) || defined(SIMULATOR)
#undef DEBUGF
#define DEBUGF ci->debugf
#undef LDEBUGF
#define LDEBUGF ci->debugf
#else
#define DEBUGF(...)
#define LDEBUGF(...)
#endif
#ifdef ROCKBOX_HAS_LOGF
#undef LOGF
#define LOGF ci->logf
#else
#define LOGF(...)
#endif
#endif
#ifdef SIMULATOR
#define PREFIX(_x_) sim_ ## _x_
#else
#define PREFIX(_x_) _x_
#endif
/* magic for normal codecs */
#define CODEC_MAGIC 0x52434F44 /* RCOD */
/* magic for encoder codecs */
#define CODEC_ENC_MAGIC 0x52454E43 /* RENC */
/* increase this every time the api struct changes */
#define CODEC_API_VERSION 23
/* 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 23
/* codec return codes */
enum codec_status {
CODEC_OK = 0,
CODEC_USB_CONNECTED,
CODEC_ERROR = -1,
};
/* 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 {
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 is, codec must return immediately */
bool stop_codec;
/* Codec should periodically check if new_track is non zero.
When it is, the codec should request a new track. */
int new_track;
/* If seek_time != 0, codec should seek to that song position (in ms)
if codec supports seeking. */
long seek_time;
/* The dsp instance to be used for audio output */
struct dsp_config *dsp;
/* Returns buffer to malloc array. Only codeclib should need this. */
void* (*get_codec_memory)(size_t *size);
/* Insert PCM data into audio buffer for playback. Playback will start
automatically. */
bool (*pcmbuf_insert)(const void *ch1, const void *ch2, const int count);
/* Set song position in WPS (value in ms). */
void (*set_elapsed)(const 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. */
size_t (*read_filebuf)(void *ptr, const size_t 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)(size_t *realsize, const size_t reqsize);
/* Advance file buffer position by <amount> amount of bytes. */
void (*advance_buffer)(const size_t 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)(const size_t newpos);
/* Codec should call this function when it has done the seeking. */
void (*seek_complete)(void);
/* Calculate mp3 seek position from given time data in ms. */
off_t (*mp3_get_filepos)(const 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);
/* Free the buffer area of the current codec after its loaded */
void (*discard_codec)(void);
void (*set_offset)(const size_t value);
/* Configure different codec buffer parameters. */
void (*configure)(const int setting, const intptr_t value);
/* kernel/ system */
void (*PREFIX(sleep))(const int ticks);
void (*yield)(void);
#if NUM_CORES > 1
struct thread_entry *
(*create_thread)(void (*function)(void), void* stack,
size_t stack_size, unsigned flags, const char *name
IF_PRIO(, int priority)
IF_COP(, unsigned int core));
void (*thread_thaw)(struct thread_entry *thread);
void (*thread_wait)(struct thread_entry *thread);
void (*semaphore_init)(struct semaphore *s, int max, int start);
void (*semaphore_wait)(struct semaphore *s);
void (*semaphore_release)(struct semaphore *s);
void (*event_init)(struct event *e, unsigned int flags);
void (*event_wait)(struct event *e, unsigned int for_state);
void (*event_set_state)(struct event *e, unsigned int state);
#endif /* NUM_CORES */
#ifdef CACHE_FUNCTIONS_AS_CALL
void (*flush_icache)(void);
void (*invalidate_icache)(void);
#endif
/* strings and memory */
char* (*strcpy)(char *dst, const char *src);
char* (*strncpy)(char *dst, const char *src, size_t length);
size_t (*strlen)(const char *str);
int (*strcmp)(const char *, const char *);
char *(*strcat)(char *s1, const char *s2);
void* (*memset)(void *dst, int c, size_t length);
void* (*memcpy)(void *out, const void *in, size_t n);
void* (*memmove)(void *out, const void *in, size_t n);
int (*memcmp)(const void *s1, const void *s2, size_t n);
void *(*memchr)(const void *s1, int c, size_t n);
#if defined(DEBUG) || defined(SIMULATOR)
void (*debugf)(const char *fmt, ...) ATTRIBUTE_PRINTF(1, 2);
#endif
#ifdef ROCKBOX_HAS_LOGF
void (*logf)(const char *fmt, ...) ATTRIBUTE_PRINTF(1, 2);
#endif
/* Tremor requires qsort */
void (*qsort)(void *base, size_t nmemb, size_t size,
int(*compar)(const void *, const void *));
/* The ADX codec accesses global_settings to test for REPEAT_ONE mode */
struct user_settings* global_settings;
#ifdef RB_PROFILE
void (*profile_thread)(void);
void (*profstop)(void);
void (*profile_func_enter)(void *this_fn, void *call_site);
void (*profile_func_exit)(void *this_fn, void *call_site);
#endif
#if defined(HAVE_RECORDING) && !defined(SIMULATOR)
volatile bool stop_encoder;
volatile int enc_codec_loaded; /* <0=error, 0=pending, >0=ok */
void (*enc_get_inputs)(struct enc_inputs *inputs);
void (*enc_set_parameters)(struct enc_parameters *params);
struct enc_chunk_hdr * (*enc_get_chunk)(void);
void (*enc_finish_chunk)(void);
unsigned char * (*enc_get_pcm_data)(size_t size);
size_t (*enc_unget_pcm_data)(size_t size);
/* 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);
ssize_t (*write)(int fd, const void* buf, size_t count);
int (*round_value_to_list32)(unsigned long value,
const unsigned long list[],
int count,
bool signd);
#endif
/* new stuff at the end, sort into place next time
the API gets incompatible */
};
/* codec header */
struct codec_header {
unsigned long magic; /* RCOD or RENC */
unsigned short target_id;
unsigned short api_version;
unsigned char *load_addr;
unsigned char *end_addr;
enum codec_status(*entry_point)(struct codec_api*);
};
#ifdef CODEC
#ifndef SIMULATOR
/* plugin_* is correct, codecs use the plugin linker script */
extern unsigned char plugin_start_addr[];
extern unsigned char plugin_end_addr[];
/* decoders */
#define CODEC_HEADER \
const struct codec_header __header \
__attribute__ ((section (".header")))= { \
CODEC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
plugin_start_addr, plugin_end_addr, codec_start };
/* encoders */
#define CODEC_ENC_HEADER \
const struct codec_header __header \
__attribute__ ((section (".header")))= { \
CODEC_ENC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
plugin_start_addr, plugin_end_addr, codec_start };
#else /* def SIMULATOR */
/* decoders */
#define CODEC_HEADER \
const struct codec_header __header \
__attribute__((visibility("default"))) = { \
CODEC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
NULL, NULL, codec_start };
/* encoders */
#define CODEC_ENC_HEADER \
const struct codec_header __header = { \
CODEC_ENC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
NULL, NULL, codec_start };
#endif /* SIMULATOR */
#endif /* CODEC */
/* create full codec path from root filenames in audio_formats[]
assumes buffer size is MAX_PATH */
void codec_get_full_path(char *path, const char *codec_root_fn);
/* defined by the codec loader (codec.c) */
int codec_load_buf(unsigned int hid, struct codec_api *api);
int codec_load_file(const char* codec, struct codec_api *api);
/* defined by the codec */
enum codec_status codec_start(struct codec_api* rockbox);
#ifndef CACHE_FUNCTION_WRAPPERS
#ifdef CACHE_FUNCTIONS_AS_CALL
#define CACHE_FUNCTION_WRAPPERS(api) \
void flush_icache(void) \
{ \
(api)->flush_icache(); \
} \
void invalidate_icache(void) \
{ \
(api)->invalidate_icache(); \
}
#else
#define CACHE_FUNCTION_WRAPPERS(api)
#endif /* CACHE_FUNCTIONS_AS_CALL */
#endif /* CACHE_FUNCTION_WRAPPERS */
#endif
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