[vlc-devel] [PATCH] Added livehttp access_out module to support HTTP Live Streaming
Keary Griffin
kearygriffin at gmail.com
Wed May 26 17:33:00 CEST 2010
---
modules/access_output/Modules.am | 2 +
modules/access_output/livehttp.c | 467 ++++++++++++++++++++++++++++++++++++++
2 files changed, 469 insertions(+), 0 deletions(-)
create mode 100644 modules/access_output/livehttp.c
diff --git a/modules/access_output/Modules.am b/modules/access_output/Modules.am
index de6c5b5..631b600 100644
--- a/modules/access_output/Modules.am
+++ b/modules/access_output/Modules.am
@@ -1,5 +1,6 @@
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)
diff --git a/modules/access_output/livehttp.c b/modules/access_output/livehttp.c
new file mode 100644
index 0000000..c668e69
--- /dev/null
+++ b/modules/access_output/livehttp.c
@@ -0,0 +1,467 @@
+/*****************************************************************************
+ * 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;
+}
--
1.7.0.4
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