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vlc/modules/access_output/livehttp.c

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/*****************************************************************************
* livehttp.c: Live HTTP Streaming
*****************************************************************************
* Copyright © 2001, 2002, 2013 VLC authors and VideoLAN
* Copyright © 2009-2010 by Keary Griffin
*
* Authors: Keary Griffin <kearygriffin at gmail.com>
* Ilkka Ollakka <ileoo at videolan dot org>
*
* 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
* (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 Lesser General Public License for more details.
*
* 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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <sys/types.h>
#include <time.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <vlc_common.h>
#include <vlc_arrays.h>
#include <vlc_configuration.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>
#include <gcrypt.h>
#include <vlc_gcrypt.h>
#include <vlc_rand.h>
#ifndef O_LARGEFILE
# define O_LARGEFILE 0
#endif
#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. Needed for audio only.")
#define NUMSEGS_TEXT N_("Number of segments")
#define NUMSEGS_LONGTEXT N_("Number of segments to include in index")
#define NOCACHE_TEXT N_("Allow cache")
#define NOCACHE_LONGTEXT N_("Add EXT-X-ALLOW-CACHE:NO directive in playlist-file if this is disabled")
#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")
#define KEYURI_TEXT N_("AES key URI to place in playlist")
#define KEYFILE_TEXT N_("AES key file")
#define KEYFILE_LONGTEXT N_("File containing the 16 bytes encryption key")
#define KEYLOADFILE_TEXT N_("File where vlc reads key-uri and keyfile-location")
#define KEYLOADFILE_LONGTEXT N_("File is read when segment starts and is assumed to be in format: "\
"key-uri\\nkey-file. File is read on the segment opening and "\
"values are used on that segment.")
#define RANDOMIV_TEXT N_("Use randomized IV for encryption")
#define RANDOMIV_LONGTEXT N_("Generate IV instead using segment-number as IV")
#define INTITIAL_SEG_TEXT N_("Number of first segment")
#define INITIAL_SEG_LONGTEXT N_("The number of the first segment generated")
vlc_module_begin ()
set_description( N_("HTTP Live streaming output") )
set_shortname( N_("LiveHTTP" ))
add_shortcut( "livehttp" )
set_capability( "sout access", 0 )
set_subcategory( SUBCAT_SOUT_ACO )
add_integer( SOUT_CFG_PREFIX "seglen", 10, SEGLEN_TEXT, SEGLEN_LONGTEXT )
add_integer( SOUT_CFG_PREFIX "numsegs", 0, NUMSEGS_TEXT, NUMSEGS_LONGTEXT )
add_integer( SOUT_CFG_PREFIX "initial-segment-number", 1, INTITIAL_SEG_TEXT, INITIAL_SEG_LONGTEXT )
add_bool( SOUT_CFG_PREFIX "splitanywhere", false,
SPLITANYWHERE_TEXT, SPLITANYWHERE_LONGTEXT )
add_bool( SOUT_CFG_PREFIX "delsegs", true,
DELSEGS_TEXT, DELSEGS_LONGTEXT )
add_bool( SOUT_CFG_PREFIX "ratecontrol", false,
RATECONTROL_TEXT, NULL )
add_bool( SOUT_CFG_PREFIX "caching", false,
NOCACHE_TEXT, NOCACHE_LONGTEXT )
add_bool( SOUT_CFG_PREFIX "generate-iv", false,
RANDOMIV_TEXT, RANDOMIV_LONGTEXT )
add_string( SOUT_CFG_PREFIX "index", NULL,
INDEX_TEXT, INDEX_LONGTEXT )
add_string( SOUT_CFG_PREFIX "index-url", NULL,
INDEXURL_TEXT, INDEXURL_LONGTEXT )
add_string( SOUT_CFG_PREFIX "key-uri", NULL,
KEYURI_TEXT, NULL )
add_loadfile(SOUT_CFG_PREFIX "key-file", NULL,
KEYFILE_TEXT, KEYFILE_LONGTEXT)
add_loadfile(SOUT_CFG_PREFIX "key-loadfile", NULL,
KEYLOADFILE_TEXT, KEYLOADFILE_LONGTEXT)
set_callbacks( Open, Close )
vlc_module_end ()
/*****************************************************************************
* Exported prototypes
*****************************************************************************/
static const char *const ppsz_sout_options[] = {
"seglen",
"splitanywhere",
"numsegs",
"delsegs",
"index",
"index-url",
"ratecontrol",
"caching",
"key-uri",
"key-file",
"key-loadfile",
"generate-iv",
"initial-segment-number",
NULL
};
static ssize_t Write( sout_access_out_t *, block_t * );
static int Control( sout_access_out_t *, int, va_list );
typedef struct output_segment
{
char *psz_filename;
char *psz_uri;
char *psz_key_uri;
char *psz_duration;
vlc_tick_t segment_length;
uint32_t i_segment_number;
uint8_t aes_ivs[16];
} output_segment_t;
typedef struct
{
char *psz_cursegPath;
char *psz_indexPath;
char *psz_indexUrl;
char *psz_keyfile;
vlc_tick_t i_keyfile_modification;
vlc_tick_t segment_max_length;
vlc_tick_t current_segment_length;
uint32_t i_segment;
block_t *full_segments;
block_t **full_segments_end;
block_t *ongoing_segment;
block_t **ongoing_segment_end;
int i_handle;
unsigned i_numsegs;
unsigned i_initial_segment;
bool b_delsegs;
bool b_ratecontrol;
bool b_splitanywhere;
bool b_caching;
bool b_generate_iv;
bool b_segment_has_data;
uint8_t aes_ivs[16];
gcry_cipher_hd_t aes_ctx;
char *key_uri;
uint8_t stuffing_bytes[16];
ssize_t stuffing_size;
vlc_array_t segments_t;
} sout_access_out_sys_t;
static int LoadCryptFile( sout_access_out_t *p_access);
static int CryptSetup( sout_access_out_t *p_access, char *keyfile );
static int CheckSegmentChange( sout_access_out_t *p_access, block_t *p_buffer );
static ssize_t writeSegment( sout_access_out_t *p_access );
static ssize_t openNextFile( sout_access_out_t *p_access, sout_access_out_sys_t *p_sys );
/*****************************************************************************
* 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;
}
if( unlikely( !( p_sys = calloc ( 1, sizeof( *p_sys ) ) ) ) )
return VLC_ENOMEM;
/* Try to get within asked segment length */
size_t i_seglen = var_GetInteger( p_access, SOUT_CFG_PREFIX "seglen" );
p_sys->segment_max_length = vlc_tick_from_sec( i_seglen );
p_sys->full_segments = NULL;
p_sys->full_segments_end = &p_sys->full_segments;
p_sys->ongoing_segment = NULL;
p_sys->ongoing_segment_end = &p_sys->ongoing_segment;
p_sys->i_numsegs = var_GetInteger( p_access, SOUT_CFG_PREFIX "numsegs" );
p_sys->i_initial_segment = var_GetInteger( p_access, SOUT_CFG_PREFIX "initial-segment-number" );
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->b_caching = var_GetBool( p_access, SOUT_CFG_PREFIX "caching") ;
p_sys->b_generate_iv = var_GetBool( p_access, SOUT_CFG_PREFIX "generate-iv") ;
p_sys->b_segment_has_data = false;
vlc_array_init( &p_sys->segments_t );
p_sys->stuffing_size = 0;
p_sys->psz_indexPath = NULL;
psz_idx = var_GetNonEmptyString( p_access, SOUT_CFG_PREFIX "index" );
if ( psz_idx )
{
char *psz_tmp;
psz_tmp = vlc_strftime( psz_idx );
free( psz_idx );
if ( !psz_tmp )
{
free( p_sys );
return VLC_ENOMEM;
}
p_sys->psz_indexPath = psz_tmp;
if( p_sys->i_initial_segment != 1 )
vlc_unlink( p_sys->psz_indexPath );
}
p_sys->psz_indexUrl = var_GetNonEmptyString( p_access, SOUT_CFG_PREFIX "index-url" );
p_sys->psz_keyfile = var_GetNonEmptyString( p_access, SOUT_CFG_PREFIX "key-loadfile" );
p_sys->key_uri = var_GetNonEmptyString( p_access, SOUT_CFG_PREFIX "key-uri" );
p_access->p_sys = p_sys;
if( p_sys->psz_keyfile && ( LoadCryptFile( p_access ) < 0 ) )
{
free( p_sys->psz_indexUrl );
free( p_sys->psz_indexPath );
free( p_sys );
msg_Err( p_access, "Encryption init failed" );
return VLC_EGENERIC;
}
else if( !p_sys->psz_keyfile && ( CryptSetup( p_access, NULL ) < 0 ) )
{
free( p_sys->psz_indexUrl );
free( p_sys->psz_indexPath );
free( p_sys );
msg_Err( p_access, "Encryption init failed" );
return VLC_EGENERIC;
}
p_sys->i_handle = -1;
p_sys->i_segment = p_sys->i_initial_segment-1;
p_sys->psz_cursegPath = NULL;
p_access->pf_write = Write;
p_access->pf_control = Control;
return VLC_SUCCESS;
}
/************************************************************************
* CryptSetup: Initialize encryption
************************************************************************/
static int CryptSetup( sout_access_out_t *p_access, char *key_file )
{
sout_access_out_sys_t *p_sys = p_access->p_sys;
uint8_t key[16];
char *keyfile = NULL;
if( !p_sys->key_uri ) /*No key uri, assume no encryption wanted*/
{
msg_Dbg( p_access, "No key uri, no encryption");
return VLC_SUCCESS;
}
if( key_file )
keyfile = strdup( key_file );
else
keyfile = var_InheritString( p_access, SOUT_CFG_PREFIX "key-file" );
if( unlikely(keyfile == NULL) )
{
msg_Err( p_access, "No key-file, no encryption" );
return VLC_EGENERIC;
}
vlc_gcrypt_init();
/*Setup encryption cipher*/
gcry_error_t err = gcry_cipher_open( &p_sys->aes_ctx, GCRY_CIPHER_AES,
GCRY_CIPHER_MODE_CBC, 0 );
if( err )
{
msg_Err( p_access, "Opening AES Cipher failed: %s", gpg_strerror(err));
free( keyfile );
return VLC_EGENERIC;
}
int keyfd = vlc_open( keyfile, O_RDONLY | O_NONBLOCK );
if( unlikely( keyfd == -1 ) )
{
msg_Err( p_access, "Unable to open keyfile %s: %s", keyfile,
vlc_strerror_c(errno) );
free( keyfile );
gcry_cipher_close( p_sys->aes_ctx );
return VLC_EGENERIC;
}
free( keyfile );
ssize_t keylen = read( keyfd, key, 16 );
vlc_close( keyfd );
if( keylen < 16 )
{
msg_Err( p_access, "No key at least 16 octects (you provided %zd), no encryption", keylen );
gcry_cipher_close( p_sys->aes_ctx );
return VLC_EGENERIC;
}
err = gcry_cipher_setkey( p_sys->aes_ctx, key, 16 );
if(err)
{
msg_Err(p_access, "Setting AES key failed: %s", gpg_strerror(err));
gcry_cipher_close( p_sys->aes_ctx );
return VLC_EGENERIC;
}
if( p_sys->b_generate_iv )
vlc_rand_bytes( p_sys->aes_ivs, 16);
return VLC_SUCCESS;
}
/************************************************************************
* LoadCryptFile: Try to parse key_uri and keyfile-location from file
************************************************************************/
static int LoadCryptFile( sout_access_out_t *p_access )
{
sout_access_out_sys_t *p_sys = p_access->p_sys;
FILE *stream = vlc_fopen( p_sys->psz_keyfile, "rt" );
char *key_file=NULL,*key_uri=NULL;
if( unlikely( stream == NULL ) )
{
msg_Err( p_access, "Unable to open keyloadfile %s: %s",
p_sys->psz_keyfile, vlc_strerror_c(errno) );
return VLC_EGENERIC;
}
//First read key_uri
ssize_t len = getline( &key_uri, &(size_t){0}, stream );
if( unlikely( len == -1 ) )
{
msg_Err( p_access, "Cannot read %s: %s", p_sys->psz_keyfile,
vlc_strerror_c(errno) );
clearerr( stream );
fclose( stream );
free( key_uri );
return VLC_EGENERIC;
}
//Strip the newline from uri, maybe scanf would be better?
key_uri[len-1]='\0';
len = getline( &key_file, &(size_t){0}, stream );
if( unlikely( len == -1 ) )
{
msg_Err( p_access, "Cannot read %s: %s", p_sys->psz_keyfile,
vlc_strerror_c(errno) );
clearerr( stream );
fclose( stream );
free( key_uri );
free( key_file );
return VLC_EGENERIC;
}
// Strip the last newline from filename
key_file[len-1]='\0';
fclose( stream );
int returncode = VLC_SUCCESS;
if( !p_sys->key_uri || strcmp( p_sys->key_uri, key_uri ) )
{
if( p_sys->key_uri )
{
free( p_sys->key_uri );
p_sys->key_uri = NULL;
}
p_sys->key_uri = strdup( key_uri );
returncode = CryptSetup( p_access, key_file );
}
free( key_file );
free( key_uri );
return returncode;
}
/************************************************************************
* CryptKey: Set encryption IV to current segment number
************************************************************************/
static int CryptKey( sout_access_out_t *p_access, uint32_t i_segment )
{
sout_access_out_sys_t *p_sys = p_access->p_sys;
if( !p_sys->b_generate_iv )
{
/* Use segment number as IV if randomIV isn't selected*/
memset( p_sys->aes_ivs, 0, 16);
p_sys->aes_ivs[15] = i_segment & 0xff;
p_sys->aes_ivs[14] = (i_segment >> 8 ) & 0xff;
p_sys->aes_ivs[13] = (i_segment >> 16 ) & 0xff;
p_sys->aes_ivs[12] = (i_segment >> 24 ) & 0xff;
}
gcry_error_t err = gcry_cipher_setiv( p_sys->aes_ctx,
p_sys->aes_ivs, 16);
if( err )
{
msg_Err(p_access, "Setting AES IVs failed: %s", gpg_strerror(err) );
gcry_cipher_close( p_sys->aes_ctx);
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
#define SEG_NUMBER_PLACEHOLDER "#"
/*****************************************************************************
* formatSegmentPath: create segment path name based on seg #
*****************************************************************************/
static char *formatSegmentPath( char *psz_path, uint32_t i_seg )
{
char *psz_result;
char *psz_firstNumSign;
if ( ! ( psz_result = vlc_strftime( 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;
}
return psz_result;
}
static void destroySegment( output_segment_t *segment )
{
free( segment->psz_filename );
free( segment->psz_duration );
free( segment->psz_uri );
free( segment->psz_key_uri );
free( segment );
}
/************************************************************************
* segmentAmountNeeded: check that playlist has at least 3*p_sys->segment_max_length of segments
* return how many segments are needed for that (max of p_sys->i_segment )
************************************************************************/
static uint32_t segmentAmountNeeded( sout_access_out_sys_t *p_sys )
{
vlc_tick_t duration = 0;
for( size_t index = 1; index <= vlc_array_count( &p_sys->segments_t ); index++ )
{
output_segment_t* segment = vlc_array_item_at_index( &p_sys->segments_t, vlc_array_count( &p_sys->segments_t ) - index );
duration += segment->segment_length;
if( duration >= ( 3 * p_sys->segment_max_length ) )
return __MAX(index, p_sys->i_numsegs);
}
return vlc_array_count( &p_sys->segments_t ) - 1;
}
/************************************************************************
* isFirstItemRemovable: Check for draft 11 section 6.2.2
* check that the first item has been around outside playlist
* segment->segment_length + (p_sys->i_numsegs * p_sys->segment_max_length) before it is removed.
************************************************************************/
static bool isFirstItemRemovable( sout_access_out_sys_t *p_sys, uint32_t i_firstseg, uint32_t i_index_offset )
{
vlc_tick_t duration = 0;
/* Check that segment has been out of playlist for segment_length + (p_sys->i_numsegs * p_sys->segment_max_length) amount
* We check this by calculating duration of the items that replaced first item in playlist
*/
for( unsigned int index = 0; index < i_index_offset; index++ )
{
output_segment_t *segment = vlc_array_item_at_index( &p_sys->segments_t, p_sys->i_segment - i_firstseg + index );
duration += segment->segment_length;
}
output_segment_t *first = vlc_array_item_at_index( &p_sys->segments_t, 0 );
return duration >= (first->segment_length + (p_sys->i_numsegs * p_sys->segment_max_length));
}
/************************************************************************
* 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;
unsigned i_index_offset = 0;
if ( p_sys->i_numsegs == 0 ||
p_sys->i_segment < ( p_sys->i_numsegs + p_sys->i_initial_segment ) )
{
i_firstseg = p_sys->i_initial_segment;
}
else
{
unsigned numsegs = segmentAmountNeeded( p_sys );
i_firstseg = ( p_sys->i_segment - numsegs ) + 1;
i_index_offset = vlc_array_count( &p_sys->segments_t ) - numsegs;
}
// First update index
if ( p_sys->psz_indexPath )
{
int val;
FILE *fp;
char *psz_idxTmp;
if ( asprintf( &psz_idxTmp, "%s.tmp", p_sys->psz_indexPath ) < 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:%.0f\n#EXT-X-VERSION:3\n#EXT-X-ALLOW-CACHE:%s"
"%s\n#EXT-X-MEDIA-SEQUENCE:%"PRIu32"\n%s", ceil(secf_from_vlc_tick( p_sys->segment_max_length )) ,
p_sys->b_caching ? "YES" : "NO",
p_sys->i_numsegs > 0 ? "" : b_isend ? "\n#EXT-X-PLAYLIST-TYPE:VOD" : "\n#EXT-X-PLAYLIST-TYPE:EVENT",
i_firstseg, ((p_sys->i_initial_segment > 1) && (p_sys->i_initial_segment == i_firstseg)) ? "#EXT-X-DISCONTINUITY\n" : ""
) < 0 )
{
free( psz_idxTmp );
fclose( fp );
return -1;
}
char *psz_current_uri=NULL;
for ( uint32_t i = i_firstseg; i <= p_sys->i_segment; i++ )
{
//scale to i_index_offset..numsegs + i_index_offset
uint32_t index = i - i_firstseg + i_index_offset;
output_segment_t *segment = vlc_array_item_at_index( &p_sys->segments_t, index );
if( p_sys->key_uri &&
( !psz_current_uri || strcmp( psz_current_uri, segment->psz_key_uri ) )
)
{
int ret = 0;
free( psz_current_uri );
psz_current_uri = strdup( segment->psz_key_uri );
if( p_sys->b_generate_iv )
{
unsigned long long iv_hi = segment->aes_ivs[0];
unsigned long long iv_lo = segment->aes_ivs[8];
for( unsigned short j = 1; j < 8; j++ )
{
iv_hi <<= 8;
iv_hi |= segment->aes_ivs[j] & 0xff;
iv_lo <<= 8;
iv_lo |= segment->aes_ivs[8+j] & 0xff;
}
ret = fprintf( fp, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\",IV=0X%16.16llx%16.16llx\n",
segment->psz_key_uri, iv_hi, iv_lo );
} else {
ret = fprintf( fp, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"\n", segment->psz_key_uri );
}
if( ret < 0 )
{
free( psz_current_uri );
free( psz_idxTmp );
fclose( fp );
return -1;
}
}
val = fprintf( fp, "#EXTINF:%s,\n%s\n", segment->psz_duration, segment->psz_uri);
if ( val < 0 )
{
free( psz_current_uri );
free( psz_idxTmp );
fclose( fp );
return -1;
}
}
free( psz_current_uri );
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_Dbg( p_access, "LiveHttpIndexComplete: %s" , p_sys->psz_indexPath );
free( psz_idxTmp );
}
// Then take care of deletion
// Try to follow pantos draft 11 section 6.2.2
while( p_sys->b_delsegs && p_sys->i_numsegs &&
isFirstItemRemovable( p_sys, i_firstseg, i_index_offset )
)
{
output_segment_t *segment = vlc_array_item_at_index( &p_sys->segments_t, 0 );
msg_Dbg( p_access, "Removing segment number %d", segment->i_segment_number );
vlc_array_remove( &p_sys->segments_t, 0 );
if ( segment->psz_filename )
{
vlc_unlink( segment->psz_filename );
}
destroySegment( segment );
i_index_offset -=1;
}
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 )
{
output_segment_t *segment = vlc_array_item_at_index( &p_sys->segments_t, vlc_array_count( &p_sys->segments_t ) - 1 );
if( p_sys->key_uri )
{
size_t pad = 16 - p_sys->stuffing_size;
memset(&p_sys->stuffing_bytes[p_sys->stuffing_size], pad, pad);
gcry_error_t err = gcry_cipher_encrypt( p_sys->aes_ctx, p_sys->stuffing_bytes, 16, NULL, 0 );
if( err ) {
msg_Err( p_access, "Couldn't encrypt 16 bytes: %s", gpg_strerror(err) );
} else {
int ret = vlc_write( p_sys->i_handle, p_sys->stuffing_bytes, 16 );
if( ret != 16 )
msg_Err( p_access, "Couldn't write 16 bytes" );
}
p_sys->stuffing_size = 0;
}
vlc_close( p_sys->i_handle );
p_sys->i_handle = -1;
if( vlc_asprintf_c( &segment->psz_duration, "%.2f", secf_from_vlc_tick( p_sys->current_segment_length ) ) == -1 )
{
msg_Err( p_access, "Couldn't set duration on closed segment");
return;
}
segment->segment_length = p_sys->current_segment_length;
segment->i_segment_number = p_sys->i_segment;
if ( p_sys->psz_cursegPath )
{
msg_Dbg( 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;
if( p_sys->ongoing_segment )
block_ChainLastAppend( &p_sys->full_segments_end, p_sys->ongoing_segment );
p_sys->ongoing_segment = NULL;
p_sys->ongoing_segment_end = &p_sys->ongoing_segment;
block_t *output_block = p_sys->full_segments;
p_sys->full_segments = NULL;
p_sys->full_segments_end = &p_sys->full_segments;
while( output_block )
{
block_t *p_next = output_block->p_next;
output_block->p_next = NULL;
Write( p_access, output_block );
output_block = p_next;
}
if( p_sys->ongoing_segment )
{
block_ChainLastAppend( &p_sys->full_segments_end, p_sys->ongoing_segment );
p_sys->ongoing_segment = NULL;
p_sys->ongoing_segment_end = &p_sys->ongoing_segment;
}
ssize_t writevalue = writeSegment( p_access );
msg_Dbg( p_access, "Writing.. %zd", writevalue );
if( unlikely( writevalue < 0 ) )
{
if( p_sys->full_segments )
block_ChainRelease( p_sys->full_segments );
if( p_sys->ongoing_segment )
block_ChainRelease( p_sys->ongoing_segment );
}
closeCurrentSegment( p_access, p_sys, true );
if( p_sys->key_uri )
{
gcry_cipher_close( p_sys->aes_ctx );
free( p_sys->key_uri );
}
while( vlc_array_count( &p_sys->segments_t ) > 0 )
{
output_segment_t *segment = vlc_array_item_at_index( &p_sys->segments_t, 0 );
vlc_array_remove( &p_sys->segments_t, 0 );
if( p_sys->b_delsegs && p_sys->i_numsegs && segment->psz_filename )
{
msg_Dbg( p_access, "Removing segment number %d name %s", segment->i_segment_number, segment->psz_filename );
vlc_unlink( segment->psz_filename );
}
destroySegment( segment );
}
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;
/* Create segment and fill it info that we can (everything excluding duration */
output_segment_t *segment = (output_segment_t*)calloc(1, sizeof(output_segment_t));
if( unlikely( !segment ) )
return -1;
segment->i_segment_number = i_newseg;
segment->psz_filename = formatSegmentPath( p_access->psz_path, i_newseg );
char *psz_idxFormat = p_sys->psz_indexUrl ? p_sys->psz_indexUrl : p_access->psz_path;
segment->psz_uri = formatSegmentPath( psz_idxFormat , i_newseg );
if ( unlikely( !segment->psz_filename ) )
{
msg_Err( p_access, "Format segmentpath failed");
destroySegment( segment );
return -1;
}
fd = vlc_open( segment->psz_filename, O_WRONLY | O_CREAT | O_LARGEFILE |
O_TRUNC, 0666 );
if ( fd == -1 )
{
msg_Err( p_access, "cannot open `%s' (%s)", segment->psz_filename,
vlc_strerror_c(errno) );
destroySegment( segment );
return -1;
}
vlc_array_append_or_abort( &p_sys->segments_t, segment );
if( p_sys->psz_keyfile )
{
LoadCryptFile( p_access );
}
if( p_sys->key_uri )
{
segment->psz_key_uri = strdup( p_sys->key_uri );
CryptKey( p_access, i_newseg );
if( p_sys->b_generate_iv )
memcpy( segment->aes_ivs, p_sys->aes_ivs, 16 );
}
msg_Dbg( p_access, "Successfully opened livehttp file: %s (%"PRIu32")" , segment->psz_filename, i_newseg );
p_sys->psz_cursegPath = strdup(segment->psz_filename);
p_sys->i_handle = fd;
p_sys->i_segment = i_newseg;
p_sys->b_segment_has_data = false;
return fd;
}
/*****************************************************************************
* CheckSegmentChange: Check if segment needs to be closed and new opened
*****************************************************************************/
static int CheckSegmentChange( sout_access_out_t *p_access, block_t *p_buffer )
{
sout_access_out_sys_t *p_sys = p_access->p_sys;
ssize_t writevalue = 0;
vlc_tick_t current_length = 0;
vlc_tick_t ongoing_length = 0;
block_ChainProperties( p_sys->full_segments, NULL, NULL, &current_length );
block_ChainProperties( p_sys->ongoing_segment, NULL, NULL, &ongoing_length );
if( p_sys->i_handle > 0 &&
(( p_buffer->i_length + current_length + ongoing_length ) >= p_sys->segment_max_length ) )
{
writevalue = writeSegment( p_access );
if( unlikely( writevalue < 0 ) )
{
block_ChainRelease ( p_buffer );
return -1;
}
closeCurrentSegment( p_access, p_sys, false );
return writevalue;
}
if ( unlikely( p_sys->i_handle < 0 ) )
{
if ( openNextFile( p_access, p_sys ) < 0 )
return -1;
}
return writevalue;
}
static ssize_t writeSegment( sout_access_out_t *p_access )
{
sout_access_out_sys_t *p_sys = p_access->p_sys;
msg_Dbg( p_access, "Writing all full segments" );
block_t *output = p_sys->full_segments;
p_sys->full_segments = NULL;
p_sys->full_segments_end = &p_sys->full_segments;
vlc_tick_t current_length = 0;
block_ChainProperties( output, NULL, NULL, &current_length );
ssize_t i_write=0;
bool encrypted = false;
p_sys->current_segment_length = current_length;
while( output )
{
if( p_sys->key_uri && !encrypted )
{
if( p_sys->stuffing_size )
{
output = block_Realloc( output, p_sys->stuffing_size, output->i_buffer );
if( unlikely(!output ) )
return VLC_ENOMEM;
memcpy( output->p_buffer, p_sys->stuffing_bytes, p_sys->stuffing_size );
p_sys->stuffing_size = 0;
}
size_t original = output->i_buffer;
size_t padded = (output->i_buffer + 15 ) & ~15;
size_t pad = padded - original;
if( pad )
{
p_sys->stuffing_size = 16-pad;
output->i_buffer -= p_sys->stuffing_size;
memcpy(p_sys->stuffing_bytes, &output->p_buffer[output->i_buffer], p_sys->stuffing_size);
}
gcry_error_t err = gcry_cipher_encrypt( p_sys->aes_ctx,
output->p_buffer, output->i_buffer, NULL, 0 );
if( err )
{
msg_Err( p_access, "Encryption failure: %s ", gpg_strerror(err) );
return -1;
}
encrypted=true;
}
ssize_t val = vlc_write( p_sys->i_handle, output->p_buffer, output->i_buffer );
if ( val == -1 )
{
if ( errno == EINTR )
continue;
return -1;
}
if ( (size_t)val >= output->i_buffer )
{
block_t *p_next = output->p_next;
block_Release (output);
output = p_next;
encrypted=false;
}
else
{
output->p_buffer += val;
output->i_buffer -= val;
}
i_write += val;
}
return i_write;
}
/*****************************************************************************
* 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 )
{
/* Check if current block is already past segment-length
and we want to write gathered blocks into segment
and update playlist */
if( p_sys->ongoing_segment && ( p_sys->b_splitanywhere || ( p_buffer->i_flags & BLOCK_FLAG_HEADER ) ) )
{
msg_Dbg( p_access, "Moving ongoing segment to full segments-queue" );
block_ChainLastAppend( &p_sys->full_segments_end, p_sys->ongoing_segment );
p_sys->ongoing_segment = NULL;
p_sys->ongoing_segment_end = &p_sys->ongoing_segment;
p_sys->b_segment_has_data = true;
}
ssize_t ret = CheckSegmentChange( p_access, p_buffer );
if( ret < 0 )
{
msg_Err( p_access, "Error in write loop");
return ret;
}
i_write += ret;
block_t *p_temp = p_buffer->p_next;
p_buffer->p_next = NULL;
block_ChainLastAppend( &p_sys->ongoing_segment_end, p_buffer );
p_buffer = p_temp;
}
return i_write;
}
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