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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* AV parser inteface declarations
*
* Copyright (c) 2007 Michael Sevakis
*
* 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 PARSER_H
#define PARSER_H
enum stream_formats
{
STREAM_FMT_UNKNOWN = -1,
STREAM_FMT_MPEG_TS, /* MPEG transport stream */
STREAM_FMT_MPEG_PS, /* MPEG program stream */
STREAM_FMT_MPV, /* MPEG Video only (1 or 2) */
STREAM_FMT_MPA, /* MPEG Audio only */
};
/* Structure used by a thread that handles a single demuxed data stream and
* receives commands from the stream manager */
enum stream_parse_states
{
/* Stream is... */
SSTATE_SYNC, /* synchronizing by trying to find a start code */
SSTATE_PARSE, /* parsing the stream looking for packets */
SSTATE_END, /* at the end of data */
};
enum stream_parse_mode
{
STREAM_PM_STREAMING = 0, /* Next packet when streaming */
STREAM_PM_RANDOM_ACCESS, /* Random-access parsing */
};
enum stream_parser_flags
{
STREAMF_CAN_SEEK = 0x1, /* Seeking possible for this stream */
};
struct stream_parser
{
/* Common generic parser data */
enum stream_formats format; /* Stream format */
uint32_t start_pts; /* The movie start time as represented by
the first audio PTS tag in the
stream converted to half minutes */
uint32_t end_pts; /* The movie end time as represented by
the maximum audio PTS tag in the
stream converted to half minutes */
uint32_t duration; /* Duration in PTS units */
unsigned flags; /* Various attributes set at init */
struct vo_ext dims; /* Movie dimensions in pixels */
uint32_t last_seek_time;
int (*next_data)(struct stream *str, enum stream_parse_mode type);
union /* A place for reusable no-cache parameters */
{
struct str_sync_data sd;
} parms;
};
extern struct stream_parser str_parser;
/* MPEG parsing */
uint8_t * mpeg_parser_scan_start_code(struct stream_scan *sk, uint32_t code);
unsigned mpeg_parser_scan_pes(struct stream_scan *sk);
uint32_t mpeg_parser_scan_scr(struct stream_scan *sk);
uint32_t mpeg_parser_scan_pts(struct stream_scan *sk, unsigned id);
off_t mpeg_stream_stream_seek_PTS(uint32_t time, int id);
/* General parsing */
bool parser_init(void);
void str_initialize(struct stream *str, off_t pos);
intptr_t parser_send_video_msg(long id, intptr_t data);
bool parser_get_video_size(struct vo_ext *sz);
int parser_init_stream(void);
void parser_close_stream(void);
static inline bool parser_can_seek(void)
{ return str_parser.flags & STREAMF_CAN_SEEK; }
uint32_t parser_seek_time(uint32_t time);
void parser_prepare_streaming(void);
void str_end_of_stream(struct stream *str);
static inline int parser_get_next_data(struct stream *str,
enum stream_parse_mode type)
{ return str_parser.next_data(str, type); }
#endif /* PARSER_H */
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