Commit ec8a62c7 authored by Keary Griffin's avatar Keary Griffin Committed by Ilkka Ollakka

Added livehttp access_out module to support HTTP Live Streaming

Signed-off-by: Ilkka Ollakka's avatarIlkka Ollakka <ileoo@videolan.org>
parent ae3528d4
SOURCES_access_output_dummy = dummy.c
SOURCES_access_output_file = file.c
SOURCES_access_output_livehttp = livehttp.c
SOURCES_access_output_udp = udp.c
SOURCES_access_output_http = http.c bonjour.c bonjour.h
SOURCES_access_output_shout = shout.c
......@@ -16,6 +17,7 @@ libaccess_output_rtmp_plugin_la_DEPENDENCIES =
libvlc_LTLIBRARIES += \
libaccess_output_dummy_plugin.la \
libaccess_output_file_plugin.la \
libaccess_output_livehttp_plugin.la \
libaccess_output_udp_plugin.la \
libaccess_output_http_plugin.la \
$(NULL)
......
/*****************************************************************************
* livehttp.c: Live HTTP Streaming
*****************************************************************************
* Copyright (C) 2001, 2002 the VideoLAN team
* Copyright (C) 2009-2010 by Keary Griffin
* $Id$
*
* Authors: Keary Griffin <kearygriffin at gmail.com>
*
* 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 <sys/types.h>
#include <time.h>
#include <fcntl.h>
#include <errno.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_sout.h>
#include <vlc_block.h>
#include <vlc_fs.h>
#include <vlc_strings.h>
#include <vlc_charset.h>
#ifndef O_LARGEFILE
# define O_LARGEFILE 0
#endif
#define TMP_IDX_SUFFIX ".tmp"
#define STR_ENDLIST "#EXT-X-ENDLIST\n"
#define MAX_RENAME_RETRIES 10
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
#define SOUT_CFG_PREFIX "sout-livehttp-"
#define SEGLEN_TEXT N_("Segment length")
#define SEGLEN_LONGTEXT N_("Length of ts stream segments")
#define SPLITANYWHERE_TEXT N_("Split segments anywhere")
#define SPLITANYWHERE_LONGTEXT N_("Don't require a keyframe before splitting "\
"a segment. Neede for audio only.")
#define NUMSEGS_TEXT N_("Number of segments")
#define NUMSEGS_LONGTEXT N_("Number of segments to include in index")
#define INDEX_TEXT N_("Index file")
#define INDEX_LONGTEXT N_("Path to the index file to create")
#define INDEXURL_TEXT N_("Full url to put in index file")
#define INDEXURL_LONGTEXT N_("Full url to put in index file. "\
"Use #'s to represent segment number")
#define DELSEGS_TEXT N_("Delete segments")
#define DELSEGS_LONGTEXT N_("Delete segments when they are no longer needed")
#define RATECONTROL_TEXT N_("Use muxers rate control mechanism")
vlc_module_begin ()
set_description( N_("HTTP Live streaming output") )
set_shortname( N_("LiveHTTP" ))
add_shortcut( "livehttp" )
set_capability( "sout access", 50 )
set_category( CAT_SOUT )
set_subcategory( SUBCAT_SOUT_ACO )
add_integer( SOUT_CFG_PREFIX "seglen", 10, NULL, SEGLEN_TEXT, SEGLEN_LONGTEXT, true )
add_integer( SOUT_CFG_PREFIX "numsegs", 0, NULL, NUMSEGS_TEXT, NUMSEGS_LONGTEXT, true )
add_bool( SOUT_CFG_PREFIX "splitanywhere", false, NULL,
SPLITANYWHERE_TEXT, SPLITANYWHERE_LONGTEXT, true )
add_bool( SOUT_CFG_PREFIX "delsegs", true, NULL,
DELSEGS_TEXT, DELSEGS_LONGTEXT, true )
add_bool( SOUT_CFG_PREFIX "ratecontrol", false, NULL,
RATECONTROL_TEXT, RATECONTROL_TEXT, true )
add_string( SOUT_CFG_PREFIX "index", NULL, NULL,
INDEX_TEXT, INDEX_LONGTEXT, true )
add_string( SOUT_CFG_PREFIX "index-url", NULL, NULL,
INDEXURL_TEXT, INDEXURL_LONGTEXT, true )
set_callbacks( Open, Close )
vlc_module_end ()
/*****************************************************************************
* Exported prototypes
*****************************************************************************/
static const char *const ppsz_sout_options[] = {
"seglen",
"splitanywhere",
"numsegs",
"delsegs",
"index",
"index-url",
"ratecontrol",
NULL
};
static ssize_t Write( sout_access_out_t *, block_t * );
static int Seek ( sout_access_out_t *, off_t );
static int Control( sout_access_out_t *, int, va_list );
struct sout_access_out_sys_t
{
char *psz_cursegPath;
char *psz_indexPath;
char *psz_indexUrl;
mtime_t i_opendts;
mtime_t i_seglenm;
uint32_t i_segment;
size_t i_seglen;
int i_handle;
unsigned i_numsegs;
bool b_delsegs;
bool b_ratecontrol;
bool b_splitanywhere;
};
/*****************************************************************************
* Open: open the file
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
sout_access_out_t *p_access = (sout_access_out_t*)p_this;
sout_access_out_sys_t *p_sys;
char *psz_idx;
config_ChainParse( p_access, SOUT_CFG_PREFIX, ppsz_sout_options, p_access->p_cfg );
if( !p_access->psz_path )
{
msg_Err( p_access, "no file name specified" );
return VLC_EGENERIC;
}
p_access->pf_write = Write;
p_access->pf_seek = Seek;
p_access->pf_control = Control;
if( !( p_sys = malloc ( sizeof( *p_sys ) ) ) )
return VLC_ENOMEM;
p_sys->i_seglen = var_GetInteger( p_access, SOUT_CFG_PREFIX "seglen" );
p_sys->i_seglenm = CLOCK_FREQ * p_sys->i_seglen;
p_sys->i_numsegs = var_GetInteger( p_access, SOUT_CFG_PREFIX "numsegs" );
p_sys->b_splitanywhere = var_GetBool( p_access, SOUT_CFG_PREFIX "splitanywhere" );
p_sys->b_delsegs = var_GetBool( p_access, SOUT_CFG_PREFIX "delsegs" );
p_sys->b_ratecontrol = var_GetBool( p_access, SOUT_CFG_PREFIX "ratecontrol") ;
p_sys->psz_indexPath = NULL;
psz_idx = var_GetNonEmptyString( p_access, SOUT_CFG_PREFIX "index" );
if ( psz_idx )
{
char *psz_tmp;
psz_tmp = str_format( p_access, psz_idx );
free( psz_idx );
if ( !psz_tmp )
{
free( p_sys );
return VLC_ENOMEM;
}
path_sanitize( psz_tmp );
p_sys->psz_indexPath = psz_tmp;
vlc_unlink( p_sys->psz_indexPath );
}
p_sys->psz_indexUrl = var_GetNonEmptyString( p_access, SOUT_CFG_PREFIX "index-url" );
p_access->p_sys = p_sys;
p_sys->i_handle = -1;
p_sys->i_segment = 0;
p_sys->psz_cursegPath = NULL;
return VLC_SUCCESS;
}
#define SEG_NUMBER_PLACEHOLDER "#"
/*****************************************************************************
* formatSegmentPath: create segment path name based on seg #
*****************************************************************************/
static char *formatSegmentPath( sout_access_out_t *p_access, char *psz_path, uint32_t i_seg, bool b_sanitize )
{
char *psz_result;
char *psz_firstNumSign;
if ( ! ( psz_result = str_format( p_access, psz_path ) ) )
return NULL;
psz_firstNumSign = psz_result + strcspn( psz_result, SEG_NUMBER_PLACEHOLDER );
if ( *psz_firstNumSign ) {
char *psz_newResult;
int i_cnt = strspn( psz_firstNumSign, SEG_NUMBER_PLACEHOLDER );
int ret;
*psz_firstNumSign = '\0';
ret = asprintf( &psz_newResult, "%s%0*d%s", psz_result, i_cnt, i_seg, psz_firstNumSign + i_cnt );
free ( psz_result );
if ( ret < 0 )
return NULL;
psz_result = psz_newResult;
}
if ( b_sanitize )
path_sanitize( psz_result );
return psz_result;
}
/************************************************************************
* updateIndexAndDel: If necessary, update index file & delete old segments
************************************************************************/
static int updateIndexAndDel( sout_access_out_t *p_access, sout_access_out_sys_t *p_sys, bool b_isend )
{
uint32_t i_firstseg;
if ( p_sys->i_numsegs == 0 || p_sys->i_segment < p_sys->i_numsegs )
i_firstseg = 1;
else
i_firstseg = ( p_sys->i_segment - p_sys->i_numsegs ) + 1;
// First update index
if ( p_sys->psz_indexPath )
{
int val;
FILE *fp;
char *psz_idxTmp;
if ( asprintf( &psz_idxTmp, "%s%s", p_sys->psz_indexPath, TMP_IDX_SUFFIX ) < 0)
return -1;
fp = vlc_fopen( psz_idxTmp, "wt");
if ( !fp )
{
msg_Err( p_access, "cannot open index file `%s'", psz_idxTmp );
free( psz_idxTmp );
return -1;
}
if ( fprintf( fp, "#EXTM3U\n#EXT-X-TARGETDURATION:%zu\n#EXT-X-MEDIA-SEQUENCE:%"PRIu32"\n", p_sys->i_seglen, i_firstseg ) < 0 )
{
free( psz_idxTmp );
fclose( fp );
return -1;
}
char *psz_idxFormat = p_sys->psz_indexUrl ? p_sys->psz_indexUrl : p_access->psz_path;
for ( uint32_t i = i_firstseg; i <= p_sys->i_segment; i++ )
{
char *psz_name;
if ( ! ( psz_name = formatSegmentPath( p_access, psz_idxFormat, i, false ) ) )
{
free( psz_idxTmp );
fclose( fp );
return -1;
}
val = fprintf( fp, "#EXTINF:%zu\n%s\n", p_sys->i_seglen, psz_name );
free( psz_name );
if ( val < 0 )
{
free( psz_idxTmp );
fclose( fp );
return -1;
}
}
if ( b_isend )
{
if ( fputs ( STR_ENDLIST, fp ) < 0)
{
free( psz_idxTmp );
fclose( fp ) ;
return -1;
}
}
fclose( fp );
val = vlc_rename ( psz_idxTmp, p_sys->psz_indexPath);
if ( val < 0 )
{
vlc_unlink( psz_idxTmp );
msg_Err( p_access, "Error moving LiveHttp index file" );
}
else
msg_Info( p_access, "LiveHttpIndexComplete: %s" , p_sys->psz_indexPath );
free( psz_idxTmp );
}
// Then take care of deletion
if ( p_sys->b_delsegs && i_firstseg > 1 )
{
char *psz_name = formatSegmentPath( p_access, p_access->psz_path, i_firstseg-1, true );
if ( psz_name )
{
vlc_unlink( psz_name );
free( psz_name );
}
}
return 0;
}
/*****************************************************************************
* closeCurrentSegment: Close the segment file
*****************************************************************************/
static void closeCurrentSegment( sout_access_out_t *p_access, sout_access_out_sys_t *p_sys, bool b_isend )
{
if ( p_sys->i_handle >= 0 )
{
close( p_sys->i_handle );
p_sys->i_handle = -1;
if ( p_sys->psz_cursegPath )
{
msg_Info( p_access, "LiveHttpSegmentComplete: %s (%"PRIu32")" , p_sys->psz_cursegPath, p_sys->i_segment );
free( p_sys->psz_cursegPath );
p_sys->psz_cursegPath = 0;
updateIndexAndDel( p_access, p_sys, b_isend );
}
}
}
/*****************************************************************************
* Close: close the target
*****************************************************************************/
static void Close( vlc_object_t * p_this )
{
sout_access_out_t *p_access = (sout_access_out_t*)p_this;
sout_access_out_sys_t *p_sys = p_access->p_sys;
closeCurrentSegment( p_access, p_sys, true );
free( p_sys->psz_indexUrl );
free( p_sys->psz_indexPath );
free( p_sys );
msg_Dbg( p_access, "livehttp access output closed" );
}
static int Control( sout_access_out_t *p_access, int i_query, va_list args )
{
sout_access_out_sys_t *p_sys = p_access->p_sys;
switch( i_query )
{
case ACCESS_OUT_CONTROLS_PACE:
{
bool *pb = va_arg( args, bool * );
*pb = !p_sys->b_ratecontrol;
//*pb = true;
break;
}
default:
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* openNextFile: Open the segment file
*****************************************************************************/
static ssize_t openNextFile( sout_access_out_t *p_access, sout_access_out_sys_t *p_sys )
{
int fd;
uint32_t i_newseg = p_sys->i_segment + 1;
char *psz_seg = formatSegmentPath( p_access, p_access->psz_path, i_newseg, true );
if ( !psz_seg )
return -1;
fd = vlc_open( psz_seg, O_WRONLY | O_CREAT | O_LARGEFILE |
O_TRUNC, 0666 );
if ( fd == -1 )
{
msg_Err( p_access, "cannot open `%s' (%m)", psz_seg );
free( psz_seg );
return -1;
}
msg_Dbg( p_access, "Successfully opened livehttp file: %s (%"PRIu32")" , psz_seg, i_newseg );
//free( psz_seg );
p_sys->psz_cursegPath = psz_seg;
p_sys->i_handle = fd;
p_sys->i_segment = i_newseg;
return fd;
}
/*****************************************************************************
* Write: standard write on a file descriptor.
*****************************************************************************/
static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer )
{
size_t i_write = 0;
sout_access_out_sys_t *p_sys = p_access->p_sys;
while( p_buffer )
{
if ( p_sys->i_handle >= 0 && ( p_sys->b_splitanywhere || ( p_buffer->i_flags & BLOCK_FLAG_TYPE_I ) ) && ( p_buffer->i_dts-p_sys->i_opendts ) > p_sys->i_seglenm )
{
closeCurrentSegment( p_access, p_sys, false );
}
if ( p_buffer->i_buffer > 0 && p_sys->i_handle < 0 )
{
p_sys->i_opendts = p_buffer->i_dts;
if ( openNextFile( p_access, p_sys ) < 0 )
return -1;
}
ssize_t val = write ( p_sys->i_handle,
p_buffer->p_buffer, p_buffer->i_buffer );
if ( val == -1 )
{
if ( errno == EINTR )
continue;
block_ChainRelease ( p_buffer );
return -1;
}
if ( (size_t)val >= p_buffer->i_buffer )
{
block_t *p_next = p_buffer->p_next;
block_Release (p_buffer);
p_buffer = p_next;
}
else
{
p_buffer->p_buffer += val;
p_buffer->i_buffer -= val;
}
i_write += val;
}
return i_write;
}
/*****************************************************************************
* Seek: seek to a specific location in a file
*****************************************************************************/
static int Seek( sout_access_out_t *p_access, off_t i_pos )
{
(void) i_pos;
msg_Err( p_access, "livehttp sout access cannot seek" );
return -1;
}
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