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[vlc] / include / vlc_sout.h
1 /*****************************************************************************
2  * stream_output.h : stream output module
3  *****************************************************************************
4  * Copyright (C) 2002-2007 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
8  *          Laurent Aimar <fenrir@via.ecp.fr>
9  *          Eric Petit <titer@videolan.org>
10  *          Jean-Paul Saman <jpsaman #_at_# m2x.nl>
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License as published by
14  * the Free Software Foundation; either version 2 of the License, or
15  * (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25  *****************************************************************************/
26
27 #ifndef VLC_SOUT_H_
28 #define VLC_SOUT_H_
29
30 /**
31  * \file
32  * This file defines structures and functions for stream ouput in vlc
33  */
34
35 #ifdef __cplusplus
36 extern "C" {
37 #endif
38
39 #include <vlc_es.h>
40
41 /** Stream output instance */
42 struct sout_instance_t
43 {
44     VLC_COMMON_MEMBERS
45
46     char *psz_sout;
47     char *psz_chain;
48
49     /* meta data (Read only) XXX it won't be set before the first packet received */
50     vlc_meta_t          *p_meta;
51
52     /** count of output that can't control the space */
53     int                 i_out_pace_nocontrol;
54
55     vlc_mutex_t         lock;
56     sout_stream_t       *p_stream;
57
58     /** Private */
59     sout_instance_sys_t *p_sys;
60 };
61
62 /** Stream output statistics */
63 typedef enum
64 {
65     SOUT_STATISTIC_DECODED_VIDEO,
66     SOUT_STATISTIC_DECODED_AUDIO,
67     SOUT_STATISTIC_DECODED_SUBTITLE,
68
69     /* Use them only if you do not goes through a access_out module */
70     SOUT_STATISTIC_SENT_PACKET,
71     SOUT_STATISTIC_SENT_BYTE,
72
73 } sout_statistic_t;
74
75 VLC_EXPORT( void, sout_UpdateStatistic, ( sout_instance_t *p_sout, sout_statistic_t, int ) );
76
77 /****************************************************************************
78  * sout_stream_id_t: opaque (private for all sout_stream_t)
79  ****************************************************************************/
80 typedef struct sout_stream_id_t  sout_stream_id_t;
81
82 /** Stream output access_output */
83 struct sout_access_out_t
84 {
85     VLC_COMMON_MEMBERS
86
87     module_t                *p_module;
88     char                    *psz_access;
89
90     int                      i_writes;
91     /** Local counter reset each time it is transferred to stats */
92     int64_t                  i_sent_bytes;
93
94     char                    *psz_path;
95     sout_access_out_sys_t   *p_sys;
96     int                     (*pf_seek)( sout_access_out_t *, off_t );
97     ssize_t                 (*pf_read)( sout_access_out_t *, block_t * );
98     ssize_t                 (*pf_write)( sout_access_out_t *, block_t * );
99     int                     (*pf_control)( sout_access_out_t *, int, va_list);
100
101     config_chain_t              *p_cfg;
102     sout_instance_t         *p_sout;
103 };
104
105 VLC_EXPORT( sout_access_out_t *,sout_AccessOutNew, ( sout_instance_t *, const char *psz_access, const char *psz_name ) );
106 VLC_EXPORT( void,               sout_AccessOutDelete, ( sout_access_out_t * ) );
107 VLC_EXPORT( int,                sout_AccessOutSeek,   ( sout_access_out_t *, off_t ) );
108 VLC_EXPORT( ssize_t,            sout_AccessOutRead,   ( sout_access_out_t *, block_t * ) );
109 VLC_EXPORT( ssize_t,            sout_AccessOutWrite,  ( sout_access_out_t *, block_t * ) );
110 VLC_EXPORT( int,                sout_AccessOutControl,( sout_access_out_t *, int, va_list ) );
111
112 /** Muxer structure */
113 struct  sout_mux_t
114 {
115     VLC_COMMON_MEMBERS
116     module_t            *p_module;
117
118     sout_instance_t     *p_sout;
119
120     char                *psz_mux;
121     config_chain_t          *p_cfg;
122
123     sout_access_out_t   *p_access;
124
125     int                 (*pf_addstream)( sout_mux_t *, sout_input_t * );
126     int                 (*pf_delstream)( sout_mux_t *, sout_input_t * );
127     int                 (*pf_mux)      ( sout_mux_t * );
128     int                 (*pf_control)  ( sout_mux_t *, int, va_list );
129
130     /* here are all inputs accepted by muxer */
131     int                 i_nb_inputs;
132     sout_input_t        **pp_inputs;
133
134     /* mux private */
135     sout_mux_sys_t      *p_sys;
136
137     /* XXX private to stream_output.c */
138     /* if muxer doesn't support adding stream at any time then we first wait
139      *  for stream then we refuse all stream and start muxing */
140     bool  b_add_stream_any_time;
141     bool  b_waiting_stream;
142     /* we wait one second after first stream added */
143     mtime_t     i_add_stream_start;
144 };
145
146 enum sout_mux_query_e
147 {
148     /* capabilities */
149     MUX_CAN_ADD_STREAM_WHILE_MUXING,    /* arg1= bool *,      res=cannot fail */
150     /* properties */
151     MUX_GET_ADD_STREAM_WAIT,            /* arg1= bool *,      res=cannot fail */
152     MUX_GET_MIME,                       /* arg1= char **            res=can fail    */
153 };
154
155 struct sout_input_t
156 {
157     sout_instance_t *p_sout;
158
159     es_format_t     *p_fmt;
160     block_fifo_t    *p_fifo;
161
162     void            *p_sys;
163 };
164
165
166 VLC_EXPORT( sout_mux_t *,   sout_MuxNew,          ( sout_instance_t*, char *, sout_access_out_t * ) );
167 VLC_EXPORT( sout_input_t *, sout_MuxAddStream,    ( sout_mux_t *, es_format_t * ) );
168 VLC_EXPORT( void,           sout_MuxDeleteStream, ( sout_mux_t *, sout_input_t * ) );
169 VLC_EXPORT( void,           sout_MuxDelete,       ( sout_mux_t * ) );
170 VLC_EXPORT( void,           sout_MuxSendBuffer, ( sout_mux_t *, sout_input_t  *, block_t * ) );
171
172 static inline int sout_MuxControl( sout_mux_t *p_mux, int i_query, ... )
173 {
174     va_list args;
175     int     i_result;
176
177     va_start( args, i_query );
178     i_result = p_mux->pf_control( p_mux, i_query, args );
179     va_end( args );
180     return i_result;
181 }
182
183 /****************************************************************************
184  * sout_stream:
185  ****************************************************************************/
186 struct sout_stream_t
187 {
188     VLC_COMMON_MEMBERS
189
190     module_t          *p_module;
191     sout_instance_t   *p_sout;
192
193     char              *psz_name;
194     config_chain_t        *p_cfg;
195     char              *psz_next;
196
197     /* Subpicture unit */
198     spu_t             *p_spu;
199
200     /* add, remove a stream */
201     sout_stream_id_t *(*pf_add)( sout_stream_t *, es_format_t * );
202     int               (*pf_del)( sout_stream_t *, sout_stream_id_t * );
203     /* manage a packet */
204     int               (*pf_send)( sout_stream_t *, sout_stream_id_t *, block_t* );
205
206     /* private */
207     sout_stream_sys_t *p_sys;
208 };
209
210 VLC_EXPORT( sout_stream_t *, sout_StreamNew, ( sout_instance_t *, char *psz_chain ) );
211 VLC_EXPORT( void,            sout_StreamDelete, ( sout_stream_t * ) );
212
213 static inline sout_stream_id_t *sout_StreamIdAdd( sout_stream_t *s, es_format_t *fmt )
214 {
215     return s->pf_add( s, fmt );
216 }
217 static inline int sout_StreamIdDel( sout_stream_t *s, sout_stream_id_t *id )
218 {
219     return s->pf_del( s, id );
220 }
221 static inline int sout_StreamIdSend( sout_stream_t *s, sout_stream_id_t *id, block_t *b )
222 {
223     return s->pf_send( s, id, b );
224 }
225
226 /****************************************************************************
227  * Announce handler
228  ****************************************************************************/
229 VLC_EXPORT(session_descriptor_t*,sout_AnnounceRegisterSDP, ( sout_instance_t *, const char *, const char *, announce_method_t* ) );
230 VLC_EXPORT( int,                sout_AnnounceUnRegister, (sout_instance_t *,session_descriptor_t* ) );
231
232 VLC_EXPORT(announce_method_t*,   sout_SAPMethod, (void) );
233 VLC_EXPORT(void,                 sout_MethodRelease, (announce_method_t *) );
234
235 /** SDP */
236
237 VLC_EXPORT( char *, vlc_sdp_Start, ( vlc_object_t *obj, const char *cfgpref, const struct sockaddr *src, size_t srclen, const struct sockaddr *addr, size_t addrlen ) );
238 VLC_EXPORT( char *, sdp_AddMedia, (char **sdp, const char *type, const char *protocol, int dport, unsigned pt, bool bw_indep, unsigned bw, const char *ptname, unsigned clockrate, unsigned channels, const char *fmtp) );
239 VLC_EXPORT( char *, sdp_AddAttribute, (char **sdp, const char *name, const char *fmt, ...) LIBVLC_FORMAT( 3, 4 ) );
240
241
242 #ifdef __cplusplus
243 }
244 #endif
245
246 #endif