1 /*****************************************************************************
2 * spu_decoder.h : sub picture unit decoder thread interface
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: spu_decoder.h,v 1.6 2002/07/20 18:01:43 sam Exp $
7 * Authors: Samuel Hocevar <sam@zoy.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 struct subpicture_sys_t
26 mtime_t i_pts; /* presentation timestamp */
28 int pi_offset[2]; /* byte offsets to data */
31 /* Color information */
37 /*****************************************************************************
38 * spudec_thread_t : sub picture unit decoder thread descriptor
39 *****************************************************************************/
40 typedef struct spudec_thread_t
43 * Thread properties and locks
45 vlc_thread_t thread_id; /* id for thread functions */
50 decoder_fifo_t * p_fifo; /* stores the PES stream data */
51 /* The bit stream structure handles the PES stream at the bit level */
52 bit_stream_t bit_stream;
57 vout_thread_t * p_vout; /* needed to create the spu objects */
62 int i_spu_size; /* size of current SPU packet */
63 int i_rle_size; /* size of the RLE part */
67 /*****************************************************************************
68 * Amount of bytes we GetChunk() in one go
69 *****************************************************************************/
70 #define SPU_CHUNK_SIZE 0x200
72 /*****************************************************************************
74 *****************************************************************************/
75 #define SPU_CMD_FORCE_DISPLAY 0x00
76 #define SPU_CMD_START_DISPLAY 0x01
77 #define SPU_CMD_STOP_DISPLAY 0x02
78 #define SPU_CMD_SET_PALETTE 0x03
79 #define SPU_CMD_SET_ALPHACHANNEL 0x04
80 #define SPU_CMD_SET_COORDINATES 0x05
81 #define SPU_CMD_SET_OFFSETS 0x06
82 #define SPU_CMD_END 0xff
84 /*****************************************************************************
85 * AddNibble: read a nibble from a source packet and add it to our integer.
86 *****************************************************************************/
87 static inline unsigned int AddNibble( unsigned int i_code,
88 u8 *p_src, int *pi_index )
92 return( i_code << 4 | ( p_src[(*pi_index)++ >> 1] & 0xf ) );
96 return( i_code << 4 | p_src[(*pi_index)++ >> 1] >> 4 );
100 /*****************************************************************************
102 *****************************************************************************/
103 vlc_thread_t spudec_CreateThread( decoder_fifo_t * p_fifo );