include/vlc_sout.h

   1 /*****************************************************************************
   2  * vlc_sout.h : stream output module
   3  *****************************************************************************
   4  * Copyright (C) 2002-2008 VLC authors and VideoLAN
   5  *
   6  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   7  *          Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Eric Petit <titer@videolan.org>
   9  *          Jean-Paul Saman <jpsaman #_at_# m2x.nl>
  10  *          Rémi Denis-Courmont
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU Lesser General Public License as published by
  14  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public License
  23  * along with this program; if not, write to the Free Software Foundation,
  24  * 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 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 #include <sys/types.h>
  35 #include <vlc_es.h>
  36
  37 /**
  38  * \defgroup sout Stream output
  39  * \ingroup output
  40  * @{
  41  * \file
  42  * Stream output modules interface
  43  */
  44
  45 /** Stream output instance (FIXME: should be private to src/ to avoid
  46  * invalid unsynchronized access) */
  47 struct sout_instance_t
  48 {
  49     struct vlc_object_t obj;
  50
  51     char *psz_sout;
  52
  53     /** count of output that can't control the space */
  54     int                 i_out_pace_nocontrol;
  55     bool                b_wants_substreams;
  56
  57     vlc_mutex_t         lock;
  58     sout_stream_t       *p_stream;
  59 };
  60
  61 /**
  62  * \defgroup sout_access Access output
  63  * Raw output byte streams
  64  * @{
  65  */
  66
  67 /** Stream output access_output */
  68 struct sout_access_out_t
  69 {
  70     struct vlc_object_t obj;
  71
  72     module_t                *p_module;
  73     char                    *psz_access;
  74
  75     char                    *psz_path;
  76     void                    *p_sys;
  77     int                     (*pf_seek)( sout_access_out_t *, off_t );
  78     ssize_t                 (*pf_read)( sout_access_out_t *, block_t * );
  79     ssize_t                 (*pf_write)( sout_access_out_t *, block_t * );
  80     int                     (*pf_control)( sout_access_out_t *, int, va_list );
  81
  82     config_chain_t          *p_cfg;
  83 };
  84
  85 enum access_out_query_e
  86 {
  87     ACCESS_OUT_CONTROLS_PACE, /* arg1=bool *, can fail (assume true) */
  88     ACCESS_OUT_CAN_SEEK, /* arg1=bool *, can fail (assume false) */
  89 };
  90
  91 VLC_API sout_access_out_t * sout_AccessOutNew( vlc_object_t *, const char *psz_access, const char *psz_name ) VLC_USED;
  92 #define sout_AccessOutNew( obj, access, name ) \
  93         sout_AccessOutNew( VLC_OBJECT(obj), access, name )
  94 VLC_API void sout_AccessOutDelete( sout_access_out_t * );
  95 VLC_API int sout_AccessOutSeek( sout_access_out_t *, off_t );
  96 VLC_API ssize_t sout_AccessOutRead( sout_access_out_t *, block_t * );
  97 VLC_API ssize_t sout_AccessOutWrite( sout_access_out_t *, block_t * );
  98 VLC_API int sout_AccessOutControl( sout_access_out_t *, int, ... );
  99
 100 static inline bool sout_AccessOutCanControlPace( sout_access_out_t *p_ao )
 101 {
 102     bool b;
 103     if( sout_AccessOutControl( p_ao, ACCESS_OUT_CONTROLS_PACE, &b ) )
 104         return true;
 105     return b;
 106 }
 107
 108 /**
 109  * @}
 110  * \defgroup sout_mux Multiplexer
 111  * Multiplexers (file formatters)
 112  * @{
 113  */
 114
 115 /** Muxer structure */
 116 struct  sout_mux_t
 117 {
 118     struct vlc_object_t obj;
 119     module_t            *p_module;
 120
 121     sout_instance_t     *p_sout;
 122
 123     char                *psz_mux;
 124     config_chain_t          *p_cfg;
 125
 126     sout_access_out_t   *p_access;
 127
 128     int                 (*pf_addstream)( sout_mux_t *, sout_input_t * );
 129     void                (*pf_delstream)( sout_mux_t *, sout_input_t * );
 130     int                 (*pf_mux)      ( sout_mux_t * );
 131     int                 (*pf_control)  ( sout_mux_t *, int, va_list );
 132
 133     /* here are all inputs accepted by muxer */
 134     int                 i_nb_inputs;
 135     sout_input_t        **pp_inputs;
 136
 137     /* mux private */
 138     void                *p_sys;
 139
 140     /* XXX private to stream_output.c */
 141     /* if muxer doesn't support adding stream at any time then we first wait
 142      *  for stream then we refuse all stream and start muxing */
 143     bool  b_add_stream_any_time;
 144     bool  b_waiting_stream;
 145     /* we wait 1.5 second after first stream added */
 146     vlc_tick_t  i_add_stream_start;
 147 };
 148
 149 enum sout_mux_query_e
 150 {
 151     /* capabilities */
 152     MUX_CAN_ADD_STREAM_WHILE_MUXING,    /* arg1= bool *,      res=cannot fail */
 153     /* properties */
 154     MUX_GET_ADD_STREAM_WAIT,            /* arg1= bool *,      res=cannot fail */
 155     MUX_GET_MIME,                       /* arg1= char **            res=can fail    */
 156 };
 157
 158 struct sout_input_t
 159 {
 160     const es_format_t *p_fmt;
 161     block_fifo_t      *p_fifo;
 162     void              *p_sys;
 163     es_format_t        fmt;
 164 };
 165
 166
 167 VLC_API sout_mux_t * sout_MuxNew( sout_instance_t*, const char *, sout_access_out_t * ) VLC_USED;
 168 VLC_API sout_input_t *sout_MuxAddStream( sout_mux_t *, const es_format_t * ) VLC_USED;
 169 VLC_API void sout_MuxDeleteStream( sout_mux_t *, sout_input_t * );
 170 VLC_API void sout_MuxDelete( sout_mux_t * );
 171 VLC_API int sout_MuxSendBuffer( sout_mux_t *, sout_input_t  *, block_t * );
 172 VLC_API int sout_MuxGetStream(sout_mux_t *, unsigned, vlc_tick_t *);
 173 VLC_API void sout_MuxFlush( sout_mux_t *, sout_input_t * );
 174
 175 static inline int sout_MuxControl( sout_mux_t *p_mux, int i_query, ... )
 176 {
 177     va_list args;
 178     int     i_result;
 179
 180     va_start( args, i_query );
 181     i_result = p_mux->pf_control( p_mux, i_query, args );
 182     va_end( args );
 183     return i_result;
 184 }
 185
 186 /** @} */
 187
 188 enum sout_stream_query_e {
 189     SOUT_STREAM_EMPTY,    /* arg1=bool *,       res=can fail (assume true) */
 190     SOUT_STREAM_WANTS_SUBSTREAMS,  /* arg1=bool *, res=can fail (assume false) */
 191     SOUT_STREAM_ID_SPU_HIGHLIGHT,  /* arg1=void *, arg2=const vlc_spu_highlight_t *, res=can fail */
 192 };
 193
 194 struct sout_stream_t
 195 {
 196     struct vlc_object_t obj;
 197
 198     module_t          *p_module;
 199     sout_instance_t   *p_sout;
 200
 201     char              *psz_name;
 202     config_chain_t    *p_cfg;
 203     sout_stream_t     *p_next;
 204
 205     /* add, remove a stream */
 206     void             *(*pf_add)( sout_stream_t *, const es_format_t * );
 207     void              (*pf_del)( sout_stream_t *, void * );
 208     /* manage a packet */
 209     int               (*pf_send)( sout_stream_t *, void *, block_t* );
 210     int               (*pf_control)( sout_stream_t *, int, va_list );
 211     void              (*pf_flush)( sout_stream_t *, void * );
 212
 213     void              *p_sys;
 214     bool pace_nocontrol;
 215 };
 216
 217 VLC_API void sout_StreamChainDelete(sout_stream_t *p_first, sout_stream_t *p_last );
 218 VLC_API sout_stream_t *sout_StreamChainNew(sout_instance_t *p_sout,
 219         const char *psz_chain, sout_stream_t *p_next, sout_stream_t **p_last) VLC_USED;
 220
 221 static inline void *sout_StreamIdAdd( sout_stream_t *s,
 222                                       const es_format_t *fmt )
 223 {
 224     return s->pf_add( s, fmt );
 225 }
 226
 227 static inline void sout_StreamIdDel( sout_stream_t *s,
 228                                      void *id )
 229 {
 230     s->pf_del( s, id );
 231 }
 232
 233 static inline int sout_StreamIdSend( sout_stream_t *s,
 234                                      void *id, block_t *b )
 235 {
 236     return s->pf_send( s, id, b );
 237 }
 238
 239 static inline void sout_StreamFlush( sout_stream_t *s,
 240                                      void *id )
 241 {
 242     if (s->pf_flush)
 243         s->pf_flush( s, id );
 244 }
 245
 246 static inline int sout_StreamControlVa( sout_stream_t *s, int i_query, va_list args )
 247 {
 248     return s->pf_control ? s->pf_control( s, i_query, args ) : VLC_EGENERIC;
 249 }
 250
 251 static inline int sout_StreamControl( sout_stream_t *s, int i_query, ... )
 252 {
 253     va_list args;
 254     int     i_result;
 255
 256     va_start( args, i_query );
 257     i_result = sout_StreamControlVa( s, i_query, args );
 258     va_end( args );
 259     return i_result;
 260 }
 261
 262 /****************************************************************************
 263  * Encoder
 264  ****************************************************************************/
 265
 266 VLC_API encoder_t * sout_EncoderCreate( vlc_object_t *, size_t );
 267 #define sout_EncoderCreate(o,s) sout_EncoderCreate(VLC_OBJECT(o),s)
 268
 269 /****************************************************************************
 270  * Announce handler
 271  ****************************************************************************/
 272 VLC_API session_descriptor_t* sout_AnnounceRegisterSDP( vlc_object_t *, const char *, const char * ) VLC_USED;
 273 VLC_API void sout_AnnounceUnRegister(vlc_object_t *,session_descriptor_t* );
 274 #define sout_AnnounceRegisterSDP(o, sdp, addr) \
 275         sout_AnnounceRegisterSDP(VLC_OBJECT (o), sdp, addr)
 276 #define sout_AnnounceUnRegister(o, a) \
 277         sout_AnnounceUnRegister(VLC_OBJECT (o), a)
 278
 279 /** SDP */
 280
 281 struct sockaddr;
 282 struct vlc_memstream;
 283
 284 VLC_API int vlc_sdp_Start(struct vlc_memstream *, vlc_object_t *obj,
 285                           const char *cfgpref,
 286                           const struct sockaddr *src, size_t slen,
 287                           const struct sockaddr *addr, size_t alen) VLC_USED;
 288 VLC_API void sdp_AddMedia(struct vlc_memstream *, const char *type,
 289                           const char *protocol, int dport, unsigned pt,
 290                           bool bw_indep, unsigned bw, const char *ptname,
 291                           unsigned clockrate, unsigned channels,
 292                           const char *fmtp);
 293 VLC_API void sdp_AddAttribute(struct vlc_memstream *, const char *name,
 294                               const char *fmt, ...) VLC_FORMAT(3, 4);
 295
 296 /** Description module */
 297 typedef struct sout_description_data_t
 298 {
 299     int i_es;
 300     es_format_t **es;
 301     vlc_sem_t *sem;
 302 } sout_description_data_t;
 303
 304 /** @} */
 305
 306 #ifdef __cplusplus
 307 }
 308 #endif
 309
 310 #endif