/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * Declarations for stream-specific threading * * 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 STREAM_THREAD_H #define STREAM_THREAD_H #define PKT_HAS_TS 0x1 /* Stream header which is the minimum to receive asynchronous buffering * notifications. * Layed-out to allow streaming access after random-access parsing */ struct stream_hdr { struct event_queue *q; /* Communication queue - separate to allow it to be placed in another section */ off_t win_left; /* Left position within data stream */ union { off_t win_right; /* Right position within data stream */ off_t pos; /* Start/current position for random-access read */ }; off_t limit; /* Limit for random-access read */ }; struct stream { struct stream_hdr hdr; /* Base stream data */ unsigned int thread; /* Stream's thread */ uint8_t* curr_packet; /* Current stream packet beginning */ uint8_t* curr_packet_end; /* Current stream packet end */ int state; /* State machine parsing mode */ uint32_t start_pts; /* First timestamp for stream */ uint32_t end_pts; /* Last timestamp for stream */ uint32_t pts; /* Last presentation timestamp */ uint32_t pkt_flags; /* PKT_* flags */ unsigned id; /* Stream identifier */ }; #define STR_FROM_HDR(sh) ((struct stream *)(sh)) /* Make sure there there is always enough data buffered ahead for * the worst possible case - regardless of whether a valid stream * would actually produce that */ #define MIN_BUFAHEAD (21+65535+6+65535+6) /* 131103 */ /* States that a stream's thread assumes internally */ enum thread_states { /* Stream thread... */ TSTATE_INIT = 0, /* is initialized and primed */ TSTATE_DATA, /* is awaiting data to be available */ TSTATE_BUFFERING, /* is buffering data */ TSTATE_EOS, /* has hit the end of data */ TSTATE_DECODE, /* is in a decoding state */ TSTATE_RENDER, /* is in a rendering state */ TSTATE_RENDER_WAIT, /* is waiting to render */ }; /* Commands that streams respond to */ enum stream_message { STREAM_NULL = 0, /* A NULL message for whatever reason - usually ignored */ STREAM_PLAY, /* Start playback at current position */ STREAM_PAUSE, /* Stop playing and await further commands */ STREAM_RESET, /* Reset the stream for a discontinuity */ STREAM_STOP, /* Stop stream - requires a reset later */ STREAM_SEEK, /* Seek the current stream to a new location */ STREAM_OPEN, /* Open a new file */ STREAM_CLOSE, /* Close the current file */ STREAM_QUIT, /* Exit the stream and thread */ STREAM_NEEDS_SYNC, /* Need to sync before stream decoding? */ STREAM_SYNC, /* Sync to the specified time from some key point */ STREAM_FIND_END_TIME, /* Get the exact end time of an elementary * stream - ie. time just after last frame is finished */ /* Disk buffer */ STREAM_DISK_BUF_FIRST, DISK_BUF_DATA_NOTIFY = STREAM_DISK_BUF_FIRST, DISK_BUF_CLEAR_DATA_NOTIFY, /* Cancel pending data notification */ DISK_BUF_CACHE_RANGE, /* Cache a range of the file in the buffer */ /* Audio stream */ STREAM_AUDIO_FIRST, /* Video stream */ STREAM_VIDEO_FIRST, VIDEO_DISPLAY_SHOW = STREAM_VIDEO_FIRST, /* Show/hide video output */ VIDEO_DISPLAY_IS_VISIBLE, /* Is the video output visible? */ VIDEO_GET_SIZE, /* Get the video dimensions */ VIDEO_PRINT_FRAME, /* Print the frame at the current position */ VIDEO_PRINT_THUMBNAIL, /* Print a thumbnail of the current position */ VIDEO_SET_CLIP_RECT, /* Set the visible video area */ VIDEO_GET_CLIP_RECT, /* Return the visible video area */ VIDEO_SET_POST_FRAME_CALLBACK, /* Set a callback after frame is drawn */ STREAM_MESSAGE_LAST, }; /* Data parameter for STREAM_SEEK */ struct stream_seek_data { uint32_t time; /* Time to seek to/by */ int whence; /* Specification of relationship to current position/file */ }; /* Data parameter for STREAM_SYNC */ struct str_sync_data { uint32_t time; /* Time to sync to */ struct stream_scan sk; /* Specification of start/limits/direction */ }; /* Stream status codes - not eqivalent to thread states */ enum stream_status { /* Stream status is... */ STREAM_DATA_END = -4, /* Stream has ended */ STREAM_DATA_NOT_READY = -3, /* Data was not available yet */ STREAM_UNSUPPORTED = -2, /* Format is unsupported */ STREAM_ERROR = -1, /* some kind of error - quit it or reset it */ STREAM_OK = 0, /* General inequality for success >= is OK, < error */ STREAM_STOPPED = 0, /* stopped and awaiting commands - send STREAM_INIT */ STREAM_PLAYING, /* playing and rendering its data */ STREAM_PAUSED, /* paused and awaiting commands */ /* Other status codes (> STREAM_OK) */ STREAM_MATCH, /* A good match was found */ STREAM_PERFECT_MATCH, /* Exactly what was wanted was found or no better match is possible */ STREAM_NOT_FOUND, /* Match not found */ }; /* Clip time to range for a particular stream */ static inline uint32_t clip_time(struct stream *str, uint32_t time) { if (time < str->start_pts) time = str->start_pts; else if (time >= str->end_pts) time = str->end_pts; return time; } extern struct stream video_str IBSS_ATTR; extern struct stream audio_str IBSS_ATTR; bool video_thread_init(void); void video_thread_exit(void); struct video_output_stats { int num_drawn; /* Number of frames drawn since reset */ int num_skipped; /* Number of frames skipped since reset */ int fps; /* fps rate in 100ths of a frame per second */ }; void video_thread_get_stats(struct video_output_stats *s); bool audio_thread_init(void); void audio_thread_exit(void); /* Some queue function wrappers to keep things clean-ish */ /* For stream use only */ static inline bool str_have_msg(struct stream *str) { return !rb->queue_empty(str->hdr.q); } static inline void str_get_msg(struct stream *str, struct queue_event *ev) { rb->queue_wait(str->hdr.q, ev); } static inline void str_get_msg_w_tmo(struct stream *str, struct queue_event *ev, int timeout) { rb->queue_wait_w_tmo(str->hdr.q, ev, timeout); } static inline void str_reply_msg(struct stream *str, intptr_t reply) { rb->queue_reply(str->hdr.q, reply); } /* Public use */ static inline intptr_t str_send_msg(struct stream *str, long id, intptr_t data) { return rb->queue_send(str->hdr.q, id, data); } static inline void str_post_msg(struct stream *str, long id, intptr_t data) { rb->queue_post(str->hdr.q, id, data); } #endif /* STREAM_THREAD_H */