vlc_sout.h 9.92 KB
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/*****************************************************************************
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 * vlc_sout.h : stream output module
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 *****************************************************************************
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 * Copyright (C) 2002-2008 VLC authors and VideoLAN
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 * $Id$
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 *
 * Authors: Christophe Massiot <massiot@via.ecp.fr>
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 *          Laurent Aimar <fenrir@via.ecp.fr>
 *          Eric Petit <titer@videolan.org>
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 *          Jean-Paul Saman <jpsaman #_at_# m2x.nl>
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 *          Rémi Denis-Courmont
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 *
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 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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 *****************************************************************************/

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#ifndef VLC_SOUT_H_
#define VLC_SOUT_H_
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#ifdef __cplusplus
extern "C" {
#endif
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#include <sys/types.h>
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#include <vlc_es.h>

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/**
 * \defgroup sout Stream output
 * \ingroup output
 * @{
 * \file
 * Stream output modules interface
 */

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/** Stream output instance (FIXME: should be private to src/ to avoid
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 * invalid unsynchronized access) */
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struct sout_instance_t
{
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    struct vlc_common_members obj;
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    char *psz_sout;
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    /** count of output that can't control the space */
    int                 i_out_pace_nocontrol;
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    vlc_mutex_t         lock;
    sout_stream_t       *p_stream;
};

/****************************************************************************
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 * sout_stream_id_sys_t: opaque (private for all sout_stream_t)
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 ****************************************************************************/
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typedef struct sout_stream_id_sys_t  sout_stream_id_sys_t;
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/**
 * \defgroup sout_access Access output
 * Raw output byte streams
 * @{
 */

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/** Stream output access_output */
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struct sout_access_out_t
{
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    struct vlc_common_members obj;
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    module_t                *p_module;
    char                    *psz_access;
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    char                    *psz_path;
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    sout_access_out_sys_t   *p_sys;
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    int                     (*pf_seek)( sout_access_out_t *, off_t );
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    ssize_t                 (*pf_read)( sout_access_out_t *, block_t * );
    ssize_t                 (*pf_write)( sout_access_out_t *, block_t * );
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    int                     (*pf_control)( sout_access_out_t *, int, va_list );
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    config_chain_t          *p_cfg;
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};
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enum access_out_query_e
{
    ACCESS_OUT_CONTROLS_PACE, /* arg1=bool *, can fail (assume true) */
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    ACCESS_OUT_CAN_SEEK, /* arg1=bool *, can fail (assume false) */
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};

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VLC_API sout_access_out_t * sout_AccessOutNew( vlc_object_t *, const char *psz_access, const char *psz_name ) VLC_USED;
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#define sout_AccessOutNew( obj, access, name ) \
        sout_AccessOutNew( VLC_OBJECT(obj), access, name )
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VLC_API void sout_AccessOutDelete( sout_access_out_t * );
VLC_API int sout_AccessOutSeek( sout_access_out_t *, off_t );
VLC_API ssize_t sout_AccessOutRead( sout_access_out_t *, block_t * );
VLC_API ssize_t sout_AccessOutWrite( sout_access_out_t *, block_t * );
VLC_API int sout_AccessOutControl( sout_access_out_t *, int, ... );
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static inline bool sout_AccessOutCanControlPace( sout_access_out_t *p_ao )
{
    bool b;
    if( sout_AccessOutControl( p_ao, ACCESS_OUT_CONTROLS_PACE, &b ) )
        return true;
    return b;
}
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/**
 * @}
 * \defgroup sout_mux Multiplexer
 * Multiplexers (file formatters)
 * @{
 */

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/** Muxer structure */
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struct  sout_mux_t
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{
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    struct vlc_common_members obj;
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    module_t            *p_module;
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    sout_instance_t     *p_sout;
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    char                *psz_mux;
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    config_chain_t          *p_cfg;
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    sout_access_out_t   *p_access;
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    int                 (*pf_addstream)( sout_mux_t *, sout_input_t * );
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    void                (*pf_delstream)( sout_mux_t *, sout_input_t * );
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    int                 (*pf_mux)      ( sout_mux_t * );
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    int                 (*pf_control)  ( sout_mux_t *, int, va_list );
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    /* here are all inputs accepted by muxer */
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    int                 i_nb_inputs;
    sout_input_t        **pp_inputs;
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    /* mux private */
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    sout_mux_sys_t      *p_sys;
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    /* XXX private to stream_output.c */
    /* if muxer doesn't support adding stream at any time then we first wait
     *  for stream then we refuse all stream and start muxing */
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    bool  b_add_stream_any_time;
    bool  b_waiting_stream;
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    /* we wait 1.5 second after first stream added */
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    mtime_t     i_add_stream_start;
};

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enum sout_mux_query_e
{
    /* capabilities */
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    MUX_CAN_ADD_STREAM_WHILE_MUXING,    /* arg1= bool *,      res=cannot fail */
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    /* properties */
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    MUX_GET_ADD_STREAM_WAIT,            /* arg1= bool *,      res=cannot fail */
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    MUX_GET_MIME,                       /* arg1= char **            res=can fail    */
};
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struct sout_input_t
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{
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    const es_format_t *p_fmt;
    block_fifo_t      *p_fifo;
    void              *p_sys;
    es_format_t        fmt;
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};

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VLC_API sout_mux_t * sout_MuxNew( sout_instance_t*, const char *, sout_access_out_t * ) VLC_USED;
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VLC_API sout_input_t *sout_MuxAddStream( sout_mux_t *, const es_format_t * ) VLC_USED;
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VLC_API void sout_MuxDeleteStream( sout_mux_t *, sout_input_t * );
VLC_API void sout_MuxDelete( sout_mux_t * );
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VLC_API int sout_MuxSendBuffer( sout_mux_t *, sout_input_t  *, block_t * );
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VLC_API int sout_MuxGetStream(sout_mux_t *, unsigned, mtime_t *);
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VLC_API void sout_MuxFlush( sout_mux_t *, sout_input_t * );
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static inline int sout_MuxControl( sout_mux_t *p_mux, int i_query, ... )
{
    va_list args;
    int     i_result;

    va_start( args, i_query );
    i_result = p_mux->pf_control( p_mux, i_query, args );
    va_end( args );
    return i_result;
}

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/** @} */

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enum sout_stream_query_e {
    SOUT_STREAM_EMPTY,    /* arg1=bool *,       res=can fail (assume true) */
};

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struct sout_stream_t
{
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    struct vlc_common_members obj;
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    module_t          *p_module;
    sout_instance_t   *p_sout;
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    char              *psz_name;
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    config_chain_t    *p_cfg;
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    sout_stream_t     *p_next;
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    /* add, remove a stream */
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    sout_stream_id_sys_t *(*pf_add)( sout_stream_t *, const es_format_t * );
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    void              (*pf_del)( sout_stream_t *, sout_stream_id_sys_t * );
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    /* manage a packet */
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    int               (*pf_send)( sout_stream_t *, sout_stream_id_sys_t *, block_t* );
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    int               (*pf_control)( sout_stream_t *, int, va_list );
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    void              (*pf_flush)( sout_stream_t *, sout_stream_id_sys_t * );
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    sout_stream_sys_t *p_sys;
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    bool pace_nocontrol;
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};

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VLC_API void sout_StreamChainDelete(sout_stream_t *p_first, sout_stream_t *p_last );
VLC_API sout_stream_t *sout_StreamChainNew(sout_instance_t *p_sout,
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        const char *psz_chain, sout_stream_t *p_next, sout_stream_t **p_last) VLC_USED;
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static inline sout_stream_id_sys_t *sout_StreamIdAdd( sout_stream_t *s,
                                                      const es_format_t *fmt )
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{
    return s->pf_add( s, fmt );
}
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static inline void sout_StreamIdDel( sout_stream_t *s,
                                     sout_stream_id_sys_t *id )
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{
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    s->pf_del( s, id );
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}
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static inline int sout_StreamIdSend( sout_stream_t *s,
                                     sout_stream_id_sys_t *id, block_t *b )
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{
    return s->pf_send( s, id, b );
}
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static inline void sout_StreamFlush( sout_stream_t *s,
                                     sout_stream_id_sys_t *id )
{
    if (s->pf_flush)
        s->pf_flush( s, id );
}

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static inline int sout_StreamControlVa( sout_stream_t *s, int i_query, va_list args )
{
    return s->pf_control ? s->pf_control( s, i_query, args ) : VLC_EGENERIC;
}

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static inline int sout_StreamControl( sout_stream_t *s, int i_query, ... )
{
    va_list args;
    int     i_result;

    va_start( args, i_query );
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    i_result = sout_StreamControlVa( s, i_query, args );
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    va_end( args );
    return i_result;
}

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/****************************************************************************
 * Encoder
 ****************************************************************************/

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VLC_API encoder_t * sout_EncoderCreate( vlc_object_t *obj );
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#define sout_EncoderCreate(o) sout_EncoderCreate(VLC_OBJECT(o))

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/****************************************************************************
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 * Announce handler
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 ****************************************************************************/
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VLC_API session_descriptor_t* sout_AnnounceRegisterSDP( vlc_object_t *, const char *, const char * ) VLC_USED;
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VLC_API void sout_AnnounceUnRegister(vlc_object_t *,session_descriptor_t* );
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#define sout_AnnounceRegisterSDP(o, sdp, addr) \
        sout_AnnounceRegisterSDP(VLC_OBJECT (o), sdp, addr)
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#define sout_AnnounceUnRegister(o, a) \
        sout_AnnounceUnRegister(VLC_OBJECT (o), a)
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/** SDP */

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struct sockaddr;
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struct vlc_memstream;

VLC_API int vlc_sdp_Start(struct vlc_memstream *, vlc_object_t *obj,
                          const char *cfgpref,
                          const struct sockaddr *src, size_t slen,
                          const struct sockaddr *addr, size_t alen) VLC_USED;
VLC_API void sdp_AddMedia(struct vlc_memstream *, 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);
VLC_API void sdp_AddAttribute(struct vlc_memstream *, const char *name,
                              const char *fmt, ...) VLC_FORMAT(3, 4);
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/** Description module */
typedef struct sout_description_data_t
{
    int i_es;
    es_format_t **es;
    vlc_sem_t *sem;
} sout_description_data_t;
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/** @} */

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#ifdef __cplusplus
}
#endif
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#endif