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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Miika Pekkarinen
*
* 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 _PLAYBACK_H
#define _PLAYBACK_H
#include <stdlib.h>
#include <ctype.h>
#include <stdbool.h>
#include "id3.h"
#include "mp3data.h"
/* File buffer configuration keys. */
#define CODEC_SET_FILEBUF_WATERMARK 1
#define CODEC_SET_FILEBUF_CHUNKSIZE 2
#define CODEC_SET_FILEBUF_LIMIT 3
/* Not yet implemented. */
#define CODEC_SET_AUDIOBUF_WATERMARK 4
#define MAX_TRACK 10
struct track_info {
struct mp3entry id3; /* TAG metadata */
struct mp3info mp3data; /* MP3 metadata */
char *codecbuf; /* Pointer to codec buffer */
size_t codecsize; /* Codec length in bytes */
off_t filerem; /* Remaining bytes of file NOT in buffer */
off_t filesize; /* File total length */
off_t filepos; /* Read position of file for next buffer fill */
off_t start_pos; /* Position to first bytes of file in buffer */
volatile int available; /* Available bytes to read from buffer */
bool taginfo_ready; /* Is metadata read */
int playlist_offset; /* File location in playlist */
};
/* Codec Interface */
struct codec_api {
off_t filesize; /* Total file length */
off_t curpos; /* Current buffer position */
/* For gapless mp3 */
struct mp3entry *id3; /* TAG metadata pointer */
struct mp3info *mp3data; /* MP3 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)(size_t *size);
/* Insert PCM data into audio buffer for playback. Playback will start
automatically. */
bool (*audiobuffer_insert)(char *data, size_t 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. */
size_t (*read_filebuf)(void *ptr, 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, size_t reqsize);
/* Advance file buffer position by <amount> amount of bytes. */
void (*advance_buffer)(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)(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);
};
#endif
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