1 /*****************************************************************************
2 * vpar_pool.h : video parser/video decoders communication
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: pool.h,v 1.1 2002/08/04 17:23:42 sam Exp $
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
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 /*****************************************************************************
26 *****************************************************************************
27 * This structure is used for the communication between the parser and the
29 *****************************************************************************/
30 typedef struct vdec_pool_s vdec_pool_t;
35 vlc_mutex_t lock; /* Structure data lock */
36 vlc_cond_t wait_empty; /* The parser blocks there when all
37 * decoder threads are busy */
38 vlc_cond_t wait_undecoded; /* The decoders block there when no
39 * macroblock has been given by the
42 /* Video decoder threads */
43 vdec_thread_t ** pp_vdec; /* Array of video decoder threads */
44 int i_smp; /* Number of symmetrical decoder threads,
45 * hence size of the pp_vdec, p_macroblocks
46 * and pp_new_macroblocks array */
49 macroblock_t * p_macroblocks;
51 /* Empty macroblocks */
52 macroblock_t ** pp_empty_macroblocks; /* Empty macroblocks */
53 int i_index_empty; /* Last empty macroblock */
55 /* Undecoded macroblocks, read by the decoders */
56 macroblock_t ** pp_new_macroblocks; /* Undecoded macroblocks */
57 int i_index_new; /* Last undecoded macroblock */
59 /* Undecoded macroblock, used when the parser and the decoder share the
62 vdec_thread_t * p_vdec; /* Fake video decoder */
64 /* Pointers to usual pool functions */
65 void (* pf_wait_pool) ( vdec_pool_t * );
66 macroblock_t * (* pf_new_mb) ( vdec_pool_t * );
67 void (* pf_free_mb) ( vdec_pool_t *, macroblock_t * );
68 void (* pf_decode_mb) ( vdec_pool_t *, macroblock_t * );
70 /* Pointer to the decoding function - used for B&W switching */
71 void (* pf_vdec_decode) ( struct vdec_thread_s *,
73 vlc_bool_t b_bw; /* Current value for B&W */
75 /* Access to the plug-ins needed by the video decoder thread */
76 void ( * pf_idct_init ) ( void ** );
77 void ( * ppppf_motion[2][2][4] ) ( yuv_data_t *, yuv_data_t *,
80 struct vpar_thread_s * p_vpar;
83 /*****************************************************************************
85 *****************************************************************************/
86 void vpar_InitPool ( struct vpar_thread_s * );
87 void vpar_SpawnPool ( struct vpar_thread_s * );
88 void vpar_EndPool ( struct vpar_thread_s * );
90 /*****************************************************************************
91 * vpar_GetMacroblock: In a vdec thread, get the next available macroblock
92 *****************************************************************************/
93 static inline macroblock_t * vpar_GetMacroblock( vdec_pool_t * p_pool,
94 volatile vlc_bool_t * pb_die )
98 vlc_mutex_lock( &p_pool->lock );
99 while( p_pool->i_index_new == 0 && !*pb_die )
101 vlc_cond_wait( &p_pool->wait_undecoded, &p_pool->lock );
106 vlc_mutex_unlock( &p_pool->lock );
110 p_mb = p_pool->pp_new_macroblocks[ --p_pool->i_index_new ];
111 vlc_mutex_unlock( &p_pool->lock );