From: Keary Griffin Date: Wed, 26 May 2010 15:33:00 +0000 (-0400) Subject: Added livehttp access_out module to support HTTP Live Streaming X-Git-Tag: 1.2.0-pre1~6472 X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=ec8a62c783a4160d399c4f96881093de3404e66a;p=vlc Added livehttp access_out module to support HTTP Live Streaming Signed-off-by: Ilkka Ollakka --- diff --git a/modules/access_output/Modules.am b/modules/access_output/Modules.am index de6c5b5734..631b600f6d 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 0000000000..c668e693f8 --- /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 + * + * 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 +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#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; +}