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Support for UDP-Lite (with full checksum coverage only atm)
[vlc] / src / control / log.c
1 /*****************************************************************************
2  * log.c: libvlc new API log functions
3  *****************************************************************************
4  * Copyright (C) 2005 the VideoLAN team
5  *
6  * $Id: core.c 14187 2006-02-07 16:37:40Z courmisch $
7  *
8  * Authors: Damien Fouilleul <damienf@videolan.org>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23  *****************************************************************************/
24
25 #include "libvlc_internal.h"
26 #include <vlc/libvlc.h>
27
28 struct libvlc_log_t
29 {
30     const libvlc_instance_t  *p_instance;
31     msg_subscription_t *p_messages;
32 };
33
34 struct libvlc_log_iterator_t
35 {
36     msg_subscription_t *p_messages;
37     int i_start;
38     int i_pos;
39     int i_end;
40 };
41
42 unsigned libvlc_get_log_verbosity( const libvlc_instance_t *p_instance, libvlc_exception_t *p_e )
43 {
44     if( p_instance )
45     {
46         return p_instance->p_libvlc_int->i_verbose;
47     }
48     RAISEZERO("Invalid VLC instance!");
49 }
50
51 void libvlc_set_log_verbosity( libvlc_instance_t *p_instance, unsigned level, libvlc_exception_t *p_e )
52 {
53     if( p_instance )
54     {
55         p_instance->p_libvlc_int->i_verbose = level;
56     }
57     else
58         RAISEVOID("Invalid VLC instance!");
59 }
60
61 libvlc_log_t *libvlc_log_open( const libvlc_instance_t *p_instance, libvlc_exception_t *p_e )
62 {
63     
64     struct libvlc_log_t *p_log =
65         (struct libvlc_log_t *)malloc(sizeof(struct libvlc_log_t));
66
67     if( !p_log ) RAISENULL( "Out of memory" );
68
69     p_log->p_instance = p_instance;
70     p_log->p_messages = msg_Subscribe(p_instance->p_libvlc_int, MSG_QUEUE_NORMAL);
71
72     if( !p_log->p_messages ) RAISENULL( "Out of memory" );
73
74     return p_log;
75 }
76
77 void libvlc_log_close( libvlc_log_t *p_log, libvlc_exception_t *p_e )
78 {
79     if( p_log && p_log->p_messages )
80     {
81         msg_Unsubscribe(p_log->p_instance->p_libvlc_int, p_log->p_messages);
82         free(p_log);
83     }
84     else
85         RAISEVOID("Invalid log object!");
86 }
87
88 unsigned libvlc_log_count( const libvlc_log_t *p_log, libvlc_exception_t *p_e )
89 {
90     if( p_log && p_log->p_messages )
91     {
92         int i_start = p_log->p_messages->i_start;
93         int i_stop  = *(p_log->p_messages->pi_stop);
94
95         if( i_stop >= i_start )
96             return i_stop-i_start;
97         else
98             return VLC_MSG_QSIZE-(i_start-i_stop);
99     }
100     RAISEZERO("Invalid log object!");
101 }
102
103 void libvlc_log_clear( libvlc_log_t *p_log, libvlc_exception_t *p_e )
104 {
105     if( p_log && p_log->p_messages )
106     {
107         vlc_mutex_lock(p_log->p_messages->p_lock);
108         p_log->p_messages->i_start = *(p_log->p_messages->pi_stop);
109         vlc_mutex_unlock(p_log->p_messages->p_lock);
110     }
111     else
112         RAISEVOID("Invalid log object!");
113 }
114
115 libvlc_log_iterator_t *libvlc_log_get_iterator( const libvlc_log_t *p_log, libvlc_exception_t *p_e )
116 {
117     if( p_log && p_log->p_messages )
118     {
119         struct libvlc_log_iterator_t *p_iter =
120             (struct libvlc_log_iterator_t *)malloc(sizeof(struct libvlc_log_iterator_t));
121
122         if( !p_iter ) RAISENULL( "Out of memory" );
123
124         vlc_mutex_lock(p_log->p_messages->p_lock);
125         p_iter->p_messages = p_log->p_messages;
126         p_iter->i_start    = p_log->p_messages->i_start;
127         p_iter->i_pos      = p_log->p_messages->i_start;
128         p_iter->i_end      = *(p_log->p_messages->pi_stop);
129         vlc_mutex_unlock(p_log->p_messages->p_lock);
130
131         return p_iter;
132     }
133     RAISENULL("Invalid log object!");
134 }
135
136 void libvlc_log_iterator_free( libvlc_log_iterator_t *p_iter, libvlc_exception_t *p_e )
137 {
138     if( p_iter )
139     {
140         free(p_iter);
141     }
142     else
143         RAISEVOID("Invalid log iterator!");
144 }
145
146 int libvlc_log_iterator_has_next( const libvlc_log_iterator_t *p_iter, libvlc_exception_t *p_e )
147 {
148     if( p_iter )
149     {
150         return p_iter->i_pos != p_iter->i_end;
151     }
152     RAISEZERO("Invalid log iterator!");
153 }
154
155 libvlc_log_message_t *libvlc_log_iterator_next( libvlc_log_iterator_t *p_iter,
156                                                 struct libvlc_log_message_t *buffer,
157                                                 libvlc_exception_t *p_e )
158 {
159     if( p_iter )
160     {
161         if( buffer && (sizeof(struct libvlc_log_message_t) == buffer->sizeof_msg) )
162         {
163             int i_pos = p_iter->i_pos;
164             if( i_pos != p_iter->i_end )
165             {
166                 msg_item_t *msg;
167                 vlc_mutex_lock(p_iter->p_messages->p_lock);
168                 msg = p_iter->p_messages->p_msg+i_pos;
169                 buffer->i_severity  = msg->i_type;
170                 buffer->psz_type    = msg_GetObjectTypeName(msg->i_object_type);
171                 buffer->psz_name    = msg->psz_module;
172                 buffer->psz_header  = msg->psz_header;
173                 buffer->psz_message = msg->psz_msg;
174                 p_iter->i_pos = ++i_pos % VLC_MSG_QSIZE;
175                 vlc_mutex_unlock(p_iter->p_messages->p_lock);
176
177                 return buffer;
178             }
179             RAISENULL("No more messages");
180         }
181         RAISENULL("Invalid message buffer!");
182     }
183     RAISENULL("Invalid log iterator!");
184 }
185