201 lines
7.9 KiB
C
201 lines
7.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Declarations for stream-specific threading
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*
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* Copyright (c) 2007 Michael Sevakis
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef STREAM_THREAD_H
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#define STREAM_THREAD_H
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#define PKT_HAS_TS 0x1
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/* Stream header which is the minimum to receive asynchronous buffering
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* notifications.
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* Layed-out to allow streaming access after random-access parsing */
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struct stream_hdr
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{
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struct event_queue *q; /* Communication queue - separate to allow it
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to be placed in another section */
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off_t win_left; /* Left position within data stream */
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union
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{
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off_t win_right; /* Right position within data stream */
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off_t pos; /* Start/current position for random-access read */
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};
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off_t limit; /* Limit for random-access read */
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};
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struct stream
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{
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struct stream_hdr hdr; /* Base stream data */
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unsigned int thread; /* Stream's thread */
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uint8_t* curr_packet; /* Current stream packet beginning */
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uint8_t* curr_packet_end; /* Current stream packet end */
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int state; /* State machine parsing mode */
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uint32_t start_pts; /* First timestamp for stream */
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uint32_t end_pts; /* Last timestamp for stream */
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uint32_t pts; /* Last presentation timestamp */
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uint32_t pkt_flags; /* PKT_* flags */
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unsigned id; /* Stream identifier */
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};
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#define STR_FROM_HDR(sh) ((struct stream *)(sh))
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/* Make sure there there is always enough data buffered ahead for
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* the worst possible case - regardless of whether a valid stream
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* would actually produce that */
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#define MIN_BUFAHEAD (21+65535+6+65535+6) /* 131103 */
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/* States that a stream's thread assumes internally */
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enum thread_states
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{
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/* Stream thread... */
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TSTATE_INIT = 0, /* is initialized and primed */
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TSTATE_DATA, /* is awaiting data to be available */
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TSTATE_BUFFERING, /* is buffering data */
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TSTATE_EOS, /* has hit the end of data */
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TSTATE_DECODE, /* is in a decoding state */
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TSTATE_RENDER, /* is in a rendering state */
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TSTATE_RENDER_WAIT, /* is waiting to render */
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};
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/* Commands that streams respond to */
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enum stream_message
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{
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STREAM_NULL = 0, /* A NULL message for whatever reason -
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usually ignored */
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STREAM_PLAY, /* Start playback at current position */
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STREAM_PAUSE, /* Stop playing and await further commands */
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STREAM_RESET, /* Reset the stream for a discontinuity */
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STREAM_STOP, /* Stop stream - requires a reset later */
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STREAM_SEEK, /* Seek the current stream to a new location */
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STREAM_OPEN, /* Open a new file */
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STREAM_CLOSE, /* Close the current file */
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STREAM_QUIT, /* Exit the stream and thread */
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STREAM_NEEDS_SYNC, /* Need to sync before stream decoding? */
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STREAM_SYNC, /* Sync to the specified time from some key point */
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STREAM_FIND_END_TIME, /* Get the exact end time of an elementary
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* stream - ie. time just after last frame is finished */
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/* Disk buffer */
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STREAM_DISK_BUF_FIRST,
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DISK_BUF_DATA_NOTIFY = STREAM_DISK_BUF_FIRST,
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DISK_BUF_CLEAR_DATA_NOTIFY, /* Cancel pending data notification */
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DISK_BUF_CACHE_RANGE, /* Cache a range of the file in the buffer */
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/* Audio stream */
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STREAM_AUDIO_FIRST,
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/* Video stream */
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STREAM_VIDEO_FIRST,
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VIDEO_DISPLAY_SHOW = STREAM_VIDEO_FIRST, /* Show/hide video output */
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VIDEO_DISPLAY_IS_VISIBLE, /* Is the video output visible? */
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VIDEO_GET_SIZE, /* Get the video dimensions */
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VIDEO_PRINT_FRAME, /* Print the frame at the current position */
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VIDEO_PRINT_THUMBNAIL, /* Print a thumbnail of the current position */
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VIDEO_SET_CLIP_RECT, /* Set the visible video area */
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VIDEO_GET_CLIP_RECT, /* Return the visible video area */
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VIDEO_SET_POST_FRAME_CALLBACK, /* Set a callback after frame is drawn */
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STREAM_MESSAGE_LAST,
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};
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/* Data parameter for STREAM_SEEK */
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struct stream_seek_data
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{
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uint32_t time; /* Time to seek to/by */
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int whence; /* Specification of relationship to current position/file */
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};
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/* Data parameter for STREAM_SYNC */
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struct str_sync_data
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{
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uint32_t time; /* Time to sync to */
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struct stream_scan sk; /* Specification of start/limits/direction */
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};
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/* Stream status codes - not eqivalent to thread states */
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enum stream_status
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{
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/* Stream status is... */
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STREAM_DATA_END = -4, /* Stream has ended */
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STREAM_DATA_NOT_READY = -3, /* Data was not available yet */
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STREAM_UNSUPPORTED = -2, /* Format is unsupported */
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STREAM_ERROR = -1, /* some kind of error - quit it or reset it */
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STREAM_OK = 0, /* General inequality for success >= is OK, < error */
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STREAM_STOPPED = 0, /* stopped and awaiting commands - send STREAM_INIT */
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STREAM_PLAYING, /* playing and rendering its data */
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STREAM_PAUSED, /* paused and awaiting commands */
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/* Other status codes (> STREAM_OK) */
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STREAM_MATCH, /* A good match was found */
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STREAM_PERFECT_MATCH, /* Exactly what was wanted was found or
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no better match is possible */
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STREAM_NOT_FOUND, /* Match not found */
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};
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/* Clip time to range for a particular stream */
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static inline uint32_t clip_time(struct stream *str, uint32_t time)
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{
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if (time < str->start_pts)
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time = str->start_pts;
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else if (time >= str->end_pts)
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time = str->end_pts;
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return time;
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}
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extern struct stream video_str IBSS_ATTR;
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extern struct stream audio_str IBSS_ATTR;
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bool video_thread_init(void);
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void video_thread_exit(void);
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struct video_output_stats
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{
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int num_drawn; /* Number of frames drawn since reset */
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int num_skipped; /* Number of frames skipped since reset */
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int fps; /* fps rate in 100ths of a frame per second */
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};
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void video_thread_get_stats(struct video_output_stats *s);
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bool audio_thread_init(void);
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void audio_thread_exit(void);
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/* Some queue function wrappers to keep things clean-ish */
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/* For stream use only */
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static inline bool str_have_msg(struct stream *str)
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{ return !rb->queue_empty(str->hdr.q); }
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static inline void str_get_msg(struct stream *str, struct queue_event *ev)
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{ rb->queue_wait(str->hdr.q, ev); }
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static inline void str_get_msg_w_tmo(struct stream *str, struct queue_event *ev,
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int timeout)
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{ rb->queue_wait_w_tmo(str->hdr.q, ev, timeout); }
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static inline void str_reply_msg(struct stream *str, intptr_t reply)
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{ rb->queue_reply(str->hdr.q, reply); }
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/* Public use */
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static inline intptr_t str_send_msg(struct stream *str, long id, intptr_t data)
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{ return rb->queue_send(str->hdr.q, id, data); }
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static inline void str_post_msg(struct stream *str, long id, intptr_t data)
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{ rb->queue_post(str->hdr.q, id, data); }
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#endif /* STREAM_THREAD_H */
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