access.c

vlc源码

/*****************************************************************************
 * access.c: RTMP input.
 *****************************************************************************
 * Copyright (C) URJC - LADyR - Luis Lopez Fernandez
 *
 * Author: Miguel Angel Cabrera Moya
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU 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.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_access.h>

#include <vlc_network.h> /* DOWN: #include <network.h> */
#include <vlc_url.h>
#include <vlc_block.h>

#include "rtmp_amf_flv.h"

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
#define CACHING_TEXT N_("Caching value in ms")
#define CACHING_LONGTEXT N_( \
    "Caching value for RTMP streams. This " \
    "value should be set in milliseconds." )

static int  Open ( vlc_object_t * );
static void Close( vlc_object_t * );

vlc_module_begin();
    set_description( N_("RTMP input") );
    set_shortname( N_("RTMP") );
    set_category( CAT_INPUT );
    set_subcategory( SUBCAT_INPUT_ACCESS );

    add_integer( "rtmp-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
                 CACHING_LONGTEXT, true );

    set_capability( "access", 0 );
    set_callbacks( Open, Close );
    add_shortcut( "rtmp" );
vlc_module_end();


/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static ssize_t  Read( access_t *, uint8_t *, size_t );
static int Seek( access_t *, int64_t );
static int Control( access_t *, int, va_list );

static void* ThreadControl( vlc_object_t * );

/*****************************************************************************
 * Open: open the rtmp connection
 *****************************************************************************/
static int Open( vlc_object_t *p_this )
{
    access_t *p_access = (access_t *) p_this;
    access_sys_t *p_sys;
    char *psz, *p; 
    int length_path, length_media_name;
    int i;

    STANDARD_READ_ACCESS_INIT

    p_sys->p_thread =
        vlc_object_create( p_access, sizeof( rtmp_control_thread_t ) );
    if( !p_sys->p_thread )
        return VLC_ENOMEM;
    vlc_object_attach( p_sys->p_thread, p_access );

    /* Parse URI - remove spaces */
    p = psz = strdup( p_access->psz_path );
    while( (p = strchr( p, ' ' )) != NULL )
        *p = '+';
    vlc_UrlParse( &p_sys->p_thread->url, psz, 0 );
    free( psz );

    if( p_sys->p_thread->url.psz_host == NULL
        || *p_sys->p_thread->url.psz_host == '\0' )
    {
        msg_Warn( p_access, "invalid host" );
        goto error;
    }

    if( p_sys->p_thread->url.i_port <= 0 )
        p_sys->p_thread->url.i_port = 1935;

    if( p_sys->p_thread->url.psz_path == NULL )
    {
        msg_Warn( p_access, "invalid path" );
        goto error;
    }

    length_path = strlen( p_sys->p_thread->url.psz_path );
    char* psz_tmp = strrchr( p_sys->p_thread->url.psz_path, '/' );
    if( !psz_tmp )
        goto error;
    length_media_name = strlen( psz_tmp ) - 1;

    p_sys->p_thread->psz_application = strndup( p_sys->p_thread->url.psz_path + 1, length_path - length_media_name - 2 );
    p_sys->p_thread->psz_media = strdup( p_sys->p_thread->url.psz_path + ( length_path - length_media_name ) );

    msg_Dbg( p_access, "rtmp: host='%s' port=%d path='%s'",
             p_sys->p_thread->url.psz_host, p_sys->p_thread->url.i_port, p_sys->p_thread->url.psz_path );

    if( p_sys->p_thread->url.psz_username && *p_sys->p_thread->url.psz_username )
    {
        msg_Dbg( p_access, "      user='%s', pwd='%s'",
                 p_sys->p_thread->url.psz_username, p_sys->p_thread->url.psz_password );
    }

    /* Initialize thread variables */
    p_sys->p_thread->b_die = 0;
    p_sys->p_thread->b_error= 0;
    p_sys->p_thread->p_fifo_input = block_FifoNew();
    p_sys->p_thread->p_empty_blocks = block_FifoNew();
    p_sys->p_thread->has_audio = 0;
    p_sys->p_thread->has_video = 0;
    p_sys->p_thread->metadata_received = 0;
    p_sys->p_thread->first_media_packet = 1;
    p_sys->p_thread->flv_tag_previous_tag_size = 0x00000000; /* FLV_TAG_FIRST_PREVIOUS_TAG_SIZE */
    p_sys->p_thread->chunk_size_recv = 128; /* RTMP_DEFAULT_CHUNK_SIZE */
    p_sys->p_thread->chunk_size_send = 128; /* RTMP_DEFAULT_CHUNK_SIZE */
    for(i = 0; i < 64; i++)
    {
        memset( &p_sys->p_thread->rtmp_headers_recv[i], 0, sizeof( rtmp_packet_t ) );
        p_sys->p_thread->rtmp_headers_send[i].length_header = -1;
        p_sys->p_thread->rtmp_headers_send[i].stream_index = -1;
        p_sys->p_thread->rtmp_headers_send[i].timestamp = -1;
        p_sys->p_thread->rtmp_headers_send[i].timestamp_relative = -1;
        p_sys->p_thread->rtmp_headers_send[i].length_encoded = -1;
        p_sys->p_thread->rtmp_headers_send[i].length_body = -1;
        p_sys->p_thread->rtmp_headers_send[i].content_type = -1;
        p_sys->p_thread->rtmp_headers_send[i].src_dst = -1;
        p_sys->p_thread->rtmp_headers_send[i].body = NULL;
    }

    p_sys->p_thread->p_base_object = p_this;

    vlc_cond_init( p_sys->p_thread, &p_sys->p_thread->wait );

    vlc_mutex_init( &p_sys->p_thread->lock );

    p_sys->p_thread->result_connect = 1;
    p_sys->p_thread->result_play = 1;
    p_sys->p_thread->result_stop = 0;

    /* Open connection */
    p_sys->p_thread->fd = net_ConnectTCP( p_access, p_sys->p_thread->url.psz_host, p_sys->p_thread->url.i_port );
    if( p_sys->p_thread->fd == -1 )
    {
        int *p_fd_listen;

        msg_Warn( p_access, "cannot connect to %s:%d", p_sys->p_thread->url.psz_host, p_sys->p_thread->url.i_port );
        msg_Dbg( p_access, "switching to passive mode" );

        p_sys->active = 0;

        p_fd_listen = net_ListenTCP( p_access, p_sys->p_thread->url.psz_host, p_sys->p_thread->url.i_port );
        if( p_fd_listen == NULL )
        {
            msg_Err( p_access, "cannot listen to %s port %i", p_sys->p_thread->url.psz_host, p_sys->p_thread->url.i_port );
            goto error2;
        }

        p_sys->p_thread->fd = net_Accept( p_access, p_fd_listen, -1 );

        net_ListenClose( p_fd_listen );

        if( rtmp_handshake_passive( p_this, p_sys->p_thread->fd ) < 0 )
        {
            msg_Err( p_access, "handshake passive failed");
            goto error2;
        }

        p_sys->p_thread->result_publish = 1;
    }
    else
    {
        p_sys->active = 1;

        if( rtmp_handshake_active( p_this, p_sys->p_thread->fd ) < 0 )
        {
            msg_Err( p_access, "handshake active failed");
            goto error2;
        }

        p_sys->p_thread->result_publish = 0;
    }

    if( vlc_thread_create( p_sys->p_thread, "rtmp control thread", ThreadControl,
                           VLC_THREAD_PRIORITY_INPUT, false ) )
    {
        msg_Err( p_access, "cannot spawn rtmp control thread" );
        goto error2;
    }

    if( p_sys->active )
    {
        if( rtmp_connect_active( p_sys->p_thread ) < 0 )
        {
            msg_Err( p_access, "connect active failed");
            goto error2;
        }
    }

    /* Set vars for reading from fifo */
    p_access->p_sys->flv_packet = NULL;
    p_access->p_sys->read_packet = 1;

    /* Update default_pts to a suitable value for rtmp access */
    var_Create( p_access, "rtmp-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );

    return VLC_SUCCESS;

error2:
    vlc_cond_destroy( &p_sys->p_thread->wait );
    vlc_mutex_destroy( &p_sys->p_thread->lock );

    free( p_sys->p_thread->psz_application );
    free( p_sys->p_thread->psz_media );

    net_Close( p_sys->p_thread->fd );
error:
    vlc_UrlClean( &p_sys->p_thread->url );

    vlc_object_detach( p_sys->p_thread );
    vlc_object_release( p_sys->p_thread );

    free( p_sys );

    return VLC_EGENERIC;
}

/*****************************************************************************
 * Close: close the rtmp connection
 *****************************************************************************/
static void Close( vlc_object_t * p_this )
{
    access_t     *p_access = (access_t *) p_this;
    access_sys_t *p_sys = p_access->p_sys;
    int i;

/*    p_sys->p_thread->b_die = true;*/
    vlc_object_kill( p_sys->p_thread );
    block_FifoWake( p_sys->p_thread->p_fifo_input );
    block_FifoWake( p_sys->p_thread->p_empty_blocks );

    vlc_thread_join( p_sys->p_thread );

    vlc_cond_destroy( &p_sys->p_thread->wait );
    vlc_mutex_destroy( &p_sys->p_thread->lock );