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vlc/modules/mux/asf.c
Alexandre Janniaux 6b7a57f984 modules: fix typos 
Typos found and reworked from codespell.
2022-01-08 15:19:32 +00:00

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/*****************************************************************************
* asf.c: asf muxer module for vlc
*****************************************************************************
* Copyright (C) 2003-2004, 2006 VLC authors and VideoLAN
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Gildas Bazin <gbazin@videolan.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 <assert.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_sout.h>
#include <vlc_block.h>
#include <vlc_codecs.h>
#include <vlc_arrays.h>
#include <vlc_rand.h>
#include "../demux/asf/libasf_guid.h"
#define MAX_ASF_TRACKS 128
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
#define SOUT_CFG_PREFIX "sout-asf-"
#define TITLE_TEXT N_("Title")
#define TITLE_LONGTEXT N_("Title to put in ASF comments." )
#define AUTHOR_TEXT N_("Author")
#define AUTHOR_LONGTEXT N_("Author to put in ASF comments." )
#define COPYRIGHT_TEXT N_("Copyright")
#define COPYRIGHT_LONGTEXT N_("Copyright string to put in ASF comments." )
#define COMMENT_TEXT N_("Comment")
#define COMMENT_LONGTEXT N_("Comment to put in ASF comments." )
#define RATING_TEXT N_("Rating")
#define RATING_LONGTEXT N_("\"Rating\" to put in ASF comments." )
#define PACKETSIZE_TEXT N_("Packet Size")
#define PACKETSIZE_LONGTEXT N_("ASF packet size -- default is 4096 bytes")
#define BITRATE_TEXT N_("Bitrate override")
#define BITRATE_LONGTEXT N_("Do not try to guess ASF bitrate. Setting this, allows you to control how Windows Media Player will cache streamed content. Set to audio+video bitrate in bytes")
vlc_module_begin ()
set_description( N_("ASF muxer") )
set_subcategory( SUBCAT_SOUT_MUX )
set_shortname( "ASF" )
set_capability( "sout mux", 5 )
add_shortcut( "asf", "asfh" )
set_callbacks( Open, Close )
add_string( SOUT_CFG_PREFIX "title", "", TITLE_TEXT, TITLE_LONGTEXT )
add_string( SOUT_CFG_PREFIX "author", "", AUTHOR_TEXT,
AUTHOR_LONGTEXT )
add_string( SOUT_CFG_PREFIX "copyright","", COPYRIGHT_TEXT,
COPYRIGHT_LONGTEXT )
add_string( SOUT_CFG_PREFIX "comment", "", COMMENT_TEXT,
COMMENT_LONGTEXT )
add_string( SOUT_CFG_PREFIX "rating", "", RATING_TEXT,
RATING_LONGTEXT )
add_integer( SOUT_CFG_PREFIX "packet-size", 4096, PACKETSIZE_TEXT,
PACKETSIZE_LONGTEXT )
add_integer( SOUT_CFG_PREFIX "bitrate-override", 0, BITRATE_TEXT,
BITRATE_LONGTEXT )
vlc_module_end ()
/*****************************************************************************
* Locales prototypes
*****************************************************************************/
static const char *const ppsz_sout_options[] = {
"title", "author", "copyright", "comment", "rating", NULL
};
static int Control ( sout_mux_t *, int, va_list );
static int AddStream( sout_mux_t *, sout_input_t * );
static void DelStream( sout_mux_t *, sout_input_t * );
static int Mux ( sout_mux_t * );
typedef struct
{
int i_id;
enum es_format_category_e i_cat;
/* codec information */
uint16_t i_tag; /* for audio */
vlc_fourcc_t i_fourcc; /* for video */
const char *psz_name; /* codec name */
int i_blockalign; /* for audio only */
bool b_audio_correction;
int i_sequence;
int i_extra;
uint8_t *p_extra;
bool b_extended;
es_format_t fmt;
} asf_track_t;
typedef struct
{
vlc_guid_t fid; /* file id */
int i_packet_size;
int64_t i_packet_count;
vlc_tick_t i_dts_first;
vlc_tick_t i_dts_last;
int64_t i_preroll_time; /* in milliseconds */
int64_t i_bitrate;
int64_t i_bitrate_override;
vlc_array_t tracks;
bool b_write_header;
block_t *pk;
int i_pk_used;
int i_pk_frame;
vlc_tick_t i_pk_dts;
bool b_asf_http;
int i_seq;
/* meta data */
char *psz_title;
char *psz_author;
char *psz_copyright;
char *psz_comment;
char *psz_rating;
} sout_mux_sys_t;
static block_t *asf_header_create( sout_mux_t *, bool );
static block_t *asf_packet_create( sout_mux_t *, asf_track_t *, block_t * );
static block_t *asf_stream_end_create( sout_mux_t *);
static block_t *asf_packet_flush( sout_mux_t * );
typedef struct
{
int i_buffer_size;
int i_buffer;
uint8_t *p_buffer;
} bo_t;
static void bo_init ( bo_t *, uint8_t *, int );
static void bo_add_u8 ( bo_t *, uint8_t );
static void bo_addle_u16( bo_t *, uint16_t );
static void bo_addle_u32( bo_t *, uint32_t );
static void bo_addle_u64( bo_t *, uint64_t );
static void bo_add_mem ( bo_t *, uint8_t *, int );
static void bo_addle_str16( bo_t *, const char * );
/*****************************************************************************
* Open:
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
sout_mux_t *p_mux = (sout_mux_t*)p_this;
sout_mux_sys_t *p_sys;
msg_Dbg( p_mux, "asf muxer opened" );
config_ChainParse( p_mux, SOUT_CFG_PREFIX, ppsz_sout_options, p_mux->p_cfg );
p_mux->pf_control = Control;
p_mux->pf_addstream = AddStream;
p_mux->pf_delstream = DelStream;
p_mux->pf_mux = Mux;
p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
if( !p_sys )
return VLC_ENOMEM;
p_sys->b_asf_http = p_mux->psz_mux && !strcmp( p_mux->psz_mux, "asfh" );
if( p_sys->b_asf_http )
{
msg_Dbg( p_mux, "creating asf stream to be used with mmsh" );
}
p_sys->pk = NULL;
p_sys->i_pk_used = 0;
p_sys->i_pk_frame = 0;
p_sys->i_dts_first =
p_sys->i_dts_last = VLC_TICK_INVALID;
p_sys->i_preroll_time = 2000;
p_sys->i_bitrate = 0;
p_sys->i_bitrate_override = 0;
p_sys->i_seq = 0;
vlc_array_init( &p_sys->tracks );
p_sys->b_write_header = true;
p_sys->i_packet_size = var_InheritInteger( p_mux, "sout-asf-packet-size" );
p_sys->i_bitrate_override = var_InheritInteger( p_mux, "sout-asf-bitrate-override" );
msg_Dbg( p_mux, "Packet size %d", p_sys->i_packet_size);
if (p_sys->i_bitrate_override)
msg_Dbg( p_mux, "Bitrate override %"PRId64, p_sys->i_bitrate_override);
p_sys->i_packet_count= 0;
/* Generate a random fid */
p_sys->fid.Data1 = 0xbabac001;
vlc_rand_bytes(&p_sys->fid.Data2, sizeof(p_sys->fid.Data2));
vlc_rand_bytes(&p_sys->fid.Data3, sizeof(p_sys->fid.Data3));
vlc_rand_bytes(p_sys->fid.Data4, sizeof(p_sys->fid.Data4));
/* Meta data */
p_sys->psz_title = var_GetString( p_mux, SOUT_CFG_PREFIX "title" );
p_sys->psz_author = var_GetString( p_mux, SOUT_CFG_PREFIX "author" );
p_sys->psz_copyright = var_GetString( p_mux, SOUT_CFG_PREFIX "copyright" );
p_sys->psz_comment = var_GetString( p_mux, SOUT_CFG_PREFIX "comment" );
p_sys->psz_rating = var_GetString( p_mux, SOUT_CFG_PREFIX "rating" );
msg_Dbg( p_mux, "meta data: title='%s', author='%s', copyright='%s', "
"comment='%s', rating='%s'",
p_sys->psz_title, p_sys->psz_author, p_sys->psz_copyright,
p_sys->psz_comment, p_sys->psz_rating );
return VLC_SUCCESS;
}
/*****************************************************************************
* Close:
*****************************************************************************/
static void Close( vlc_object_t * p_this )
{
sout_mux_t *p_mux = (sout_mux_t*)p_this;
sout_mux_sys_t *p_sys = p_mux->p_sys;
block_t *out;
msg_Dbg( p_mux, "Asf muxer closed" );
/* Flush last packet if any */
if( (out = asf_packet_flush( p_mux ) ) )
{
sout_AccessOutWrite( p_mux->p_access, out );
}
if( ( out = asf_stream_end_create( p_mux ) ) )
{
sout_AccessOutWrite( p_mux->p_access, out );
}
/* rewrite header */
if( sout_AccessOutSeek( p_mux->p_access, 0 ) == VLC_SUCCESS )
{
out = asf_header_create( p_mux, false );
sout_AccessOutWrite( p_mux->p_access, out );
}
for( size_t i = 0; i < vlc_array_count( &p_sys->tracks ); i++ )
{
asf_track_t *track = vlc_array_item_at_index( &p_sys->tracks, i );
free( track->p_extra );
es_format_Clean( &track->fmt );
free( track );
}
vlc_array_clear( &p_sys->tracks );
free( p_sys->psz_title );
free( p_sys->psz_author );
free( p_sys->psz_copyright );
free( p_sys->psz_comment );
free( p_sys->psz_rating );
free( p_sys );
}
/*****************************************************************************
* Capability:
*****************************************************************************/
static int Control( sout_mux_t *p_mux, int i_query, va_list args )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
bool *pb_bool;
char **ppsz;
switch( i_query )
{
case MUX_CAN_ADD_STREAM_WHILE_MUXING:
pb_bool = va_arg( args, bool * );
*pb_bool = false;
return VLC_SUCCESS;
case MUX_GET_MIME:
ppsz = va_arg( args, char ** );
if( p_sys->b_asf_http )
*ppsz = strdup( "video/x-ms-asf-stream" );
else
*ppsz = strdup( "video/x-ms-asf" );
return VLC_SUCCESS;
default:
return VLC_EGENERIC;
}
}
/*****************************************************************************
* AddStream:
*****************************************************************************/
static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
asf_track_t *tk;
bo_t bo;
msg_Dbg( p_mux, "adding input" );
if( vlc_array_count( &p_sys->tracks ) >= MAX_ASF_TRACKS )
{
msg_Dbg( p_mux, "cannot add this track (too much tracks)" );
return VLC_EGENERIC;
}
tk = p_input->p_sys = malloc( sizeof( asf_track_t ) );
if( unlikely(p_input->p_sys == NULL) )
return VLC_ENOMEM;
memset( tk, 0, sizeof( *tk ) );
tk->i_cat = p_input->p_fmt->i_cat;
tk->i_sequence = 0;
tk->b_audio_correction = 0;
tk->b_extended = false;
switch( tk->i_cat )
{
case AUDIO_ES:
{
int i_blockalign = p_input->p_fmt->audio.i_blockalign;
int i_bitspersample = p_input->p_fmt->audio.i_bitspersample;
int i_extra = 0;
switch( p_input->p_fmt->i_codec )
{
case VLC_CODEC_A52:
tk->i_tag = WAVE_FORMAT_A52;
tk->psz_name = "A/52";
i_bitspersample = 0;
break;
case VLC_CODEC_MP4A:
tk->i_tag = WAVE_FORMAT_AAC;
tk->psz_name = "MPEG-4 Audio";
i_bitspersample = 0;
break;
case VLC_CODEC_MP3:
tk->psz_name = "MPEG Audio Layer 3";
tk->i_tag = WAVE_FORMAT_MPEGLAYER3;
i_bitspersample = 0;
i_blockalign = 1;
i_extra = 12;
break;
case VLC_CODEC_MPGA:
tk->psz_name = "MPEG Audio Layer 1/2";
tk->i_tag = WAVE_FORMAT_MPEG;
i_bitspersample = 0;
i_blockalign = 1;
i_extra = 22;
break;
case VLC_CODEC_WMA1:
tk->psz_name = "Windows Media Audio v1";
tk->i_tag = WAVE_FORMAT_WMA1;
tk->b_audio_correction = true;
break;
case VLC_CODEC_WMA2:
tk->psz_name= "Windows Media Audio (v2) 7, 8 and 9 Series";
tk->i_tag = WAVE_FORMAT_WMA2;
tk->b_audio_correction = true;
break;
case VLC_CODEC_WMAP:
tk->psz_name = "Windows Media Audio 9 Professional";
tk->i_tag = WAVE_FORMAT_WMAP;
tk->b_audio_correction = true;
break;
case VLC_CODEC_WMAL:
tk->psz_name = "Windows Media Audio 9 Lossless";
tk->i_tag = WAVE_FORMAT_WMAL;
tk->b_audio_correction = true;
break;
/* raw codec */
case VLC_CODEC_U8:
tk->psz_name = "Raw audio 8bits";
tk->i_tag = WAVE_FORMAT_PCM;
i_blockalign= p_input->p_fmt->audio.i_channels;
i_bitspersample = 8;
break;
case VLC_CODEC_S16L:
tk->psz_name = "Raw audio 16bits";
tk->i_tag = WAVE_FORMAT_PCM;
i_blockalign= 2 * p_input->p_fmt->audio.i_channels;
i_bitspersample = 16;
break;
case VLC_CODEC_S24L:
tk->psz_name = "Raw audio 24bits";
tk->i_tag = WAVE_FORMAT_PCM;
i_blockalign= 3 * p_input->p_fmt->audio.i_channels;
i_bitspersample = 24;
break;
case VLC_CODEC_S32L:
tk->psz_name = "Raw audio 32bits";
tk->i_tag = WAVE_FORMAT_PCM;
i_blockalign= 4 * p_input->p_fmt->audio.i_channels;
i_bitspersample = 32;
break;
default:
return VLC_EGENERIC;
}
tk->i_extra = sizeof( WAVEFORMATEX ) +
p_input->p_fmt->i_extra + i_extra;
tk->p_extra = malloc( tk->i_extra );
if( !tk->p_extra )
return VLC_ENOMEM;
bo_init( &bo, tk->p_extra, tk->i_extra );
bo_addle_u16( &bo, tk->i_tag );
bo_addle_u16( &bo, p_input->p_fmt->audio.i_channels );
bo_addle_u32( &bo, p_input->p_fmt->audio.i_rate );
bo_addle_u32( &bo, p_input->p_fmt->i_bitrate / 8 );
bo_addle_u16( &bo, i_blockalign );
tk->i_blockalign = i_blockalign;
bo_addle_u16( &bo, i_bitspersample );
if( p_input->p_fmt->i_extra > 0 )
{
bo_addle_u16( &bo, p_input->p_fmt->i_extra );
bo_add_mem ( &bo, p_input->p_fmt->p_extra,
p_input->p_fmt->i_extra );
}
else
{
bo_addle_u16( &bo, i_extra );
if( tk->i_tag == WAVE_FORMAT_MPEGLAYER3 )
{
msg_Dbg( p_mux, "adding mp3 header" );
bo_addle_u16( &bo, 1 ); /* wId */
bo_addle_u32( &bo, 2 ); /* fdwFlags */
bo_addle_u16( &bo, 1152 ); /* nBlockSize */
bo_addle_u16( &bo, 1 ); /* nFramesPerBlock */
bo_addle_u16( &bo, 1393 ); /* nCodecDelay */
}
else if( tk->i_tag == WAVE_FORMAT_MPEG )
{
msg_Dbg( p_mux, "adding mp2 header" );
bo_addle_u16( &bo, 2 ); /* fwHeadLayer */
bo_addle_u32( &bo, p_input->p_fmt->i_bitrate );
bo_addle_u16( &bo, p_input->p_fmt->audio.i_channels == 2 ?1:8 );
bo_addle_u16( &bo, 0 ); /* fwHeadModeExt */
bo_addle_u16( &bo, 1 ); /* wHeadEmphasis */
bo_addle_u16( &bo, 16 ); /* fwHeadFlags */
bo_addle_u32( &bo, 0 ); /* dwPTSLow */
bo_addle_u32( &bo, 0 ); /* dwPTSHigh */
}
}
if( p_input->p_fmt->i_bitrate > 24000 )
{
p_sys->i_bitrate += p_input->p_fmt->i_bitrate;
}
else
{
p_sys->i_bitrate += 128000;
}
if (p_sys->i_bitrate_override)
p_sys->i_bitrate = p_sys->i_bitrate_override;
break;
}
case VIDEO_ES:
{
const es_format_t *p_fmt = p_input->p_fmt;
uint8_t *p_codec_extra = NULL;
int i_codec_extra = 0;
if( p_fmt->i_codec == VLC_CODEC_MP4V )
{
tk->psz_name = "MPEG-4 Video";
tk->i_fourcc = VLC_FOURCC( 'M', 'P', '4', 'S' );
}
else if( p_fmt->i_codec == VLC_CODEC_DIV3 )
{
tk->psz_name = "MSMPEG-4 V3 Video";
tk->i_fourcc = VLC_FOURCC( 'M', 'P', '4', '3' );
}
else if( p_fmt->i_codec == VLC_CODEC_DIV2 )
{
tk->psz_name = "MSMPEG-4 V2 Video";
tk->i_fourcc = VLC_FOURCC( 'M', 'P', '4', '2' );
}
else if( p_fmt->i_codec == VLC_CODEC_DIV1 )
{
tk->psz_name = "MSMPEG-4 V1 Video";
tk->i_fourcc = VLC_FOURCC( 'M', 'P', 'G', '4' );
}
else if( p_fmt->i_codec == VLC_CODEC_WMV1 )
{
tk->psz_name = "Windows Media Video 7";
tk->i_fourcc = VLC_FOURCC( 'W', 'M', 'V', '1' );
}
else if( p_fmt->i_codec == VLC_CODEC_WMV2 )
{
tk->psz_name = "Windows Media Video 8";
tk->i_fourcc = VLC_FOURCC( 'W', 'M', 'V', '2' );
}
else if( p_fmt->i_codec == VLC_CODEC_WMV3 )
{
tk->psz_name = "Windows Media Video 9";
tk->i_fourcc = VLC_FOURCC( 'W', 'M', 'V', '3' );
tk->b_extended = true;
}
else if( p_fmt->i_codec == VLC_CODEC_VC1 )
{
tk->psz_name = "Windows Media Video 9 Advanced Profile";
tk->i_fourcc = VLC_FOURCC( 'W', 'V', 'C', '1' );
tk->b_extended = true;
if( p_fmt->i_extra > 0 )
{
p_codec_extra = malloc( 1 + p_fmt->i_extra );
if( p_codec_extra )
{
i_codec_extra = 1 + p_fmt->i_extra;
p_codec_extra[0] = 0x01;
memcpy( &p_codec_extra[1], p_fmt->p_extra, p_fmt->i_extra );
}
}
}
else if( p_fmt->i_codec == VLC_CODEC_H264 )
{
tk->psz_name = "H.264/MPEG-4 AVC";
tk->i_fourcc = VLC_FOURCC('h','2','6','4');
}
else
{
tk->psz_name = _("Unknown Video");
tk->i_fourcc = p_fmt->i_original_fourcc ? p_fmt->i_original_fourcc : p_fmt->i_codec;
}
if( !i_codec_extra && p_fmt->i_extra > 0 )
{
p_codec_extra = malloc( p_fmt->i_extra );
if( p_codec_extra )
{
i_codec_extra = p_fmt->i_extra;
memcpy( p_codec_extra, p_fmt->p_extra, p_fmt->i_extra );
}
}
tk->i_extra = 11 + sizeof( VLC_BITMAPINFOHEADER ) + i_codec_extra;
tk->p_extra = malloc( tk->i_extra );
if( !tk->p_extra )
{
free( p_codec_extra );
return VLC_ENOMEM;
}
bo_init( &bo, tk->p_extra, tk->i_extra );
bo_addle_u32( &bo, p_fmt->video.i_width );
bo_addle_u32( &bo, p_fmt->video.i_height );
bo_add_u8 ( &bo, 0x02 ); /* flags */
bo_addle_u16( &bo, sizeof( VLC_BITMAPINFOHEADER ) + i_codec_extra );
bo_addle_u32( &bo, sizeof( VLC_BITMAPINFOHEADER ) + i_codec_extra );
bo_addle_u32( &bo, p_fmt->video.i_width );
bo_addle_u32( &bo, p_fmt->video.i_height );
bo_addle_u16( &bo, 1 );
bo_addle_u16( &bo, 24 );
bo_add_mem( &bo, (uint8_t*)&tk->i_fourcc, 4 );
bo_addle_u32( &bo, 0 );
bo_addle_u32( &bo, 0 );
bo_addle_u32( &bo, 0 );
bo_addle_u32( &bo, 0 );
bo_addle_u32( &bo, 0 );
if( i_codec_extra > 0 )
{
bo_add_mem( &bo, p_codec_extra, i_codec_extra );
free( p_codec_extra );
}
if( p_fmt->i_bitrate > 50000 )
{
p_sys->i_bitrate += p_fmt->i_bitrate;
}
else
{
p_sys->i_bitrate += 512000;
}
if( p_sys->i_bitrate_override )
p_sys->i_bitrate = p_sys->i_bitrate_override;
break;
}
default:
msg_Err(p_mux, "unhandled track type" );
free( tk );
return VLC_EGENERIC;
}
if( vlc_array_append( &p_sys->tracks, tk ) )
{
free( tk->p_extra );
free( tk );
return VLC_EGENERIC;
}
es_format_Copy( &tk->fmt, p_input->p_fmt );
tk->i_id = vlc_array_index_of_item( &p_sys->tracks, tk ) + 1;
if( p_sys->b_asf_http )
p_sys->b_write_header = true;
return VLC_SUCCESS;
}
/*****************************************************************************
* DelStream:
*****************************************************************************/
static void DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
{
/* if bitrate ain't defined in commandline, reduce it when tracks are deleted
*/
sout_mux_sys_t *p_sys = p_mux->p_sys;
asf_track_t *tk = p_input->p_sys;
msg_Dbg( p_mux, "removing input" );
if(!p_sys->i_bitrate_override)
{
if( tk->i_cat == AUDIO_ES )
{
if( p_input->p_fmt->i_bitrate > 24000 )
p_sys->i_bitrate -= p_input->p_fmt->i_bitrate;
else
p_sys->i_bitrate -= 128000;
}
else if(tk->i_cat == VIDEO_ES )
{
if( p_input->p_fmt->i_bitrate > 50000 )
p_sys->i_bitrate -= p_input->p_fmt->i_bitrate;
else
p_sys->i_bitrate -= 512000;
}
}
if( p_sys->b_asf_http )
{
vlc_array_remove( &p_sys->tracks, vlc_array_index_of_item( &p_sys->tracks, tk ) );
p_sys->b_write_header = true;
}
}
/*****************************************************************************
* Mux:
*****************************************************************************/
static int Mux( sout_mux_t *p_mux )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
if( p_sys->b_write_header )
{
block_t *out = asf_header_create( p_mux, true );
out->i_flags |= BLOCK_FLAG_HEADER;
sout_AccessOutWrite( p_mux->p_access, out );
p_sys->b_write_header = false;
}
for( ;; )
{
sout_input_t *p_input;
asf_track_t *tk;
vlc_tick_t i_dts;
block_t *data;
block_t *pk;
int i_stream = sout_MuxGetStream( p_mux, 1, &i_dts );
if( i_stream < 0 )
{
/* not enough data */
return VLC_SUCCESS;
}
if( p_sys->i_dts_first == VLC_TICK_INVALID )
{
p_sys->i_dts_first = i_dts;
}
if( p_sys->i_dts_last < i_dts )
{
p_sys->i_dts_last = i_dts;
}
p_input = p_mux->pp_inputs[i_stream];
tk = (asf_track_t*)p_input->p_sys;
data = block_FifoGet( p_input->p_fifo );
/* Convert VC1 to ASF special format */
if( tk->i_fourcc == VLC_FOURCC( 'W', 'V', 'C', '1' ) )
{
while( data->i_buffer >= 4 &&
( data->p_buffer[0] != 0x00 || data->p_buffer[1] != 0x00 ||
data->p_buffer[2] != 0x01 ||
( data->p_buffer[3] != 0x0D && data->p_buffer[3] != 0x0C ) ) )
{
data->i_buffer--;
data->p_buffer++;
}
if( data->i_buffer >= 4 )
{
data->i_buffer -= 4;
data->p_buffer += 4;
}
}
if( ( pk = asf_packet_create( p_mux, tk, data ) ) )
{
sout_AccessOutWrite( p_mux->p_access, pk );
}
}
return VLC_SUCCESS;
}
/****************************************************************************
* Asf header construction
****************************************************************************/
/****************************************************************************
* Buffer out
****************************************************************************/
static void bo_init( bo_t *p_bo, uint8_t *p_buffer, int i_size )
{
p_bo->i_buffer_size = i_size;
p_bo->i_buffer = 0;
p_bo->p_buffer = p_buffer;
}
static void bo_add_u8( bo_t *p_bo, uint8_t i )
{
if( p_bo->i_buffer < p_bo->i_buffer_size )
{
p_bo->p_buffer[p_bo->i_buffer] = i;
}
p_bo->i_buffer++;
}
static void bo_addle_u16( bo_t *p_bo, uint16_t i )
{
bo_add_u8( p_bo, i &0xff );
bo_add_u8( p_bo, ( ( i >> 8) &0xff ) );
}
static void bo_addle_u32( bo_t *p_bo, uint32_t i )
{
bo_addle_u16( p_bo, i &0xffff );
bo_addle_u16( p_bo, ( ( i >> 16) &0xffff ) );
}
static void bo_addle_u64( bo_t *p_bo, uint64_t i )
{
bo_addle_u32( p_bo, i &0xffffffff );
bo_addle_u32( p_bo, ( ( i >> 32) &0xffffffff ) );
}
static void bo_add_mem( bo_t *p_bo, uint8_t *p_mem, int i_size )
{
int i_copy = __MIN( i_size, p_bo->i_buffer_size - p_bo->i_buffer );
if( i_copy > 0 )
{
memcpy( &p_bo->p_buffer[p_bo->i_buffer], p_mem, i_copy );
}
p_bo->i_buffer += i_size;
}
static void bo_addle_str16( bo_t *bo, const char *str )
{
bo_addle_u16( bo, strlen( str ) + 1 );
for( ;; )
{
uint16_t c = (uint8_t)*str++;
bo_addle_u16( bo, c );
if( c == '\0' ) break;
}
}
static void bo_addle_str16_nosize( bo_t *bo, const char *str )
{
for( ;; )
{
uint16_t c = (uint8_t)*str++;
bo_addle_u16( bo, c );
if( c == '\0' ) break;
}
}
/****************************************************************************
* GUID definitions
****************************************************************************/
static void bo_add_guid( bo_t *p_bo, const vlc_guid_t *id )
{
bo_addle_u32( p_bo, id->Data1 );
bo_addle_u16( p_bo, id->Data2 );
bo_addle_u16( p_bo, id->Data3 );
for( int i = 0; i < 8; i++ )
{
bo_add_u8( p_bo, id->Data4[i] );
}
}
/****************************************************************************
* Misc
****************************************************************************/
static void asf_chunk_add( bo_t *bo,
int i_type, int i_len, int i_flags, int i_seq )
{
bo_addle_u16( bo, i_type );
bo_addle_u16( bo, i_len + 8 );
bo_addle_u32( bo, i_seq );
bo_addle_u16( bo, i_flags );
bo_addle_u16( bo, i_len + 8 );
}
static block_t *asf_header_create( sout_mux_t *p_mux, bool b_broadcast )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
vlc_tick_t i_duration = 0;
int i_size, i_header_ext_size;
int i_ci_size, i_cm_size = 0, i_cd_size = 0;
block_t *out;
bo_t bo;
msg_Dbg( p_mux, "Asf muxer creating header" );
if( p_sys->i_dts_first != VLC_TICK_INVALID && p_sys->i_dts_last > p_sys->i_dts_first )
{
i_duration = p_sys->i_dts_last - p_sys->i_dts_first;
}
/* calculate header size */
i_size = 30 + 104;
i_ci_size = 44;
for( size_t i = 0; i < vlc_array_count( &p_sys->tracks ); i++ )
{
asf_track_t *tk = vlc_array_item_at_index( &p_sys->tracks, i );
/* update also track-id */
tk->i_id = i + 1;
i_size += 78 + tk->i_extra;
i_ci_size += 8 + 2 * strlen( tk->psz_name );
if( tk->i_cat == AUDIO_ES ) i_ci_size += 4;
else if( tk->i_cat == VIDEO_ES ) i_ci_size += 6;
/* Error correction data field */
if( tk->b_audio_correction ) i_size += 8;
}
/* size of the content description object */
if( *p_sys->psz_title || *p_sys->psz_author || *p_sys->psz_copyright ||
*p_sys->psz_comment || *p_sys->psz_rating )
{
i_cd_size = 34 + 2 * ( strlen( p_sys->psz_title ) + 1 +
strlen( p_sys->psz_author ) + 1 +
strlen( p_sys->psz_copyright ) + 1 +
strlen( p_sys->psz_comment ) + 1 +
strlen( p_sys->psz_rating ) + 1 );
}
i_header_ext_size = 46;
/* size of the metadata object */
for( size_t i = 0; i < vlc_array_count( &p_sys->tracks ); i++ )
{
const asf_track_t *p_track = vlc_array_item_at_index( &p_sys->tracks, i );
if( p_track->i_cat == VIDEO_ES &&
p_track->fmt.video.i_sar_num != 0 &&
p_track->fmt.video.i_sar_den != 0 )
{
i_cm_size = 26 + 2 * (16 + 2 * sizeof("AspectRatio?"));
}
if( p_track->b_extended )
i_header_ext_size += 88;
}
i_header_ext_size += i_cm_size;
i_size += i_ci_size + i_cd_size + i_header_ext_size ;
if( p_sys->b_asf_http )
{
out = block_Alloc( i_size + 50 + 12 );
bo_init( &bo, out->p_buffer, i_size + 50 + 12 );
asf_chunk_add( &bo, 0x4824, i_size + 50, 0xc00, p_sys->i_seq++ );
}
else
{
out = block_Alloc( i_size + 50 );
bo_init( &bo, out->p_buffer, i_size + 50 );
}
/* header object */
bo_add_guid ( &bo, &asf_object_header_guid );
bo_addle_u64( &bo, i_size );
bo_addle_u32( &bo, 2 + vlc_array_count( &p_sys->tracks ) + 1 +
(i_cd_size ? 1 : 0) + (i_cm_size ? 1 : 0) );
bo_add_u8 ( &bo, 1 );
bo_add_u8 ( &bo, 2 );
/* sub object */
/* file properties */
bo_add_guid ( &bo, &asf_object_file_properties_guid );
bo_addle_u64( &bo, 104 );
bo_add_guid ( &bo, &p_sys->fid );
bo_addle_u64( &bo, i_size + 50 + p_sys->i_packet_count *
p_sys->i_packet_size ); /* file size */
bo_addle_u64( &bo, 0 ); /* creation date */
bo_addle_u64( &bo, b_broadcast ? 0xffffffffLL : p_sys->i_packet_count );
bo_addle_u64( &bo, MSFTIME_FROM_VLC_TICK(i_duration) ); /* play duration (100ns) */
bo_addle_u64( &bo, MSFTIME_FROM_VLC_TICK(i_duration) ); /* send duration (100ns) */
bo_addle_u64( &bo, p_sys->i_preroll_time ); /* preroll duration (ms) */
bo_addle_u32( &bo, b_broadcast ? 0x01 : 0x02 /* seekable */ ); /* flags */
bo_addle_u32( &bo, p_sys->i_packet_size ); /* packet size min */
bo_addle_u32( &bo, p_sys->i_packet_size ); /* packet size max */
/* NOTE: According to p6-9 of the ASF specification the bitrate cannot be 0,
* therefore apply this workaround to make sure it is not 0. If the bitrate is
* 0 the file will play in WMP11, but not in Sliverlight and WMP12 */
bo_addle_u32( &bo, p_sys->i_bitrate > 0 ? p_sys->i_bitrate : 1 ); /* maxbitrate */
/* header extension */
bo_add_guid ( &bo, &asf_object_header_extension_guid );
bo_addle_u64( &bo, i_header_ext_size );
bo_add_guid ( &bo, &asf_guid_reserved_1 );
bo_addle_u16( &bo, 6 );
bo_addle_u32( &bo, i_header_ext_size - 46 );
/* extended stream properties */
for( size_t i = 0; i < vlc_array_count( &p_sys->tracks ); i++ )
{
const asf_track_t *p_track = vlc_array_item_at_index( &p_sys->tracks, i );
const es_format_t *p_fmt = &p_track->fmt;
if( !p_track->b_extended )
continue;
uint64_t i_avg_duration = 0;
if( p_fmt->i_cat == VIDEO_ES &&
p_fmt->video.i_frame_rate > 0 && p_fmt->video.i_frame_rate_base > 0 )
i_avg_duration = ( INT64_C(10000000) * p_fmt->video.i_frame_rate_base +
p_fmt->video.i_frame_rate/2 ) / p_fmt->video.i_frame_rate;
bo_add_guid ( &bo, &asf_object_extended_stream_properties_guid );
bo_addle_u64( &bo, 88 );
bo_addle_u64( &bo, 0 );
bo_addle_u64( &bo, 0 );
bo_addle_u32( &bo, p_fmt->i_bitrate ); /* Bitrate */
bo_addle_u32( &bo, p_sys->i_preroll_time ); /* Buffer size */
bo_addle_u32( &bo, 0 ); /* Initial buffer fullness */
bo_addle_u32( &bo, p_fmt->i_bitrate ); /* Alternate Bitrate */
bo_addle_u32( &bo, 0 ); /* Alternate Buffer size */
bo_addle_u32( &bo, 0 ); /* Alternate Initial buffer fullness */
bo_addle_u32( &bo, 0 ); /* Maximum object size (0 = unknown) */
bo_addle_u32( &bo, 0x02 ); /* Flags (seekable) */
bo_addle_u16( &bo, p_track->i_id ); /* Stream number */
bo_addle_u16( &bo, 0 ); /* Stream language index */
bo_addle_u64( &bo, i_avg_duration ); /* Average time per frame */
bo_addle_u16( &bo, 0 ); /* Stream name count */
bo_addle_u16( &bo, 0 ); /* Payload extension system count */
}
/* metadata object (part of header extension) */
if( i_cm_size )
{
unsigned int i_dst_num, i_dst_den;
asf_track_t *tk = NULL;
for( size_t i = 0; i < vlc_array_count( &p_sys->tracks ); i++ )
{
tk = vlc_array_item_at_index( &p_sys->tracks, i );
if( tk->i_cat == VIDEO_ES &&
tk->fmt.video.i_sar_num != 0 &&
tk->fmt.video.i_sar_den != 0 )
{
vlc_ureduce( &i_dst_num, &i_dst_den,
tk->fmt.video.i_sar_num,
tk->fmt.video.i_sar_den, 0 );
break;
}
}
assert( tk != NULL );
msg_Dbg( p_mux, "pixel aspect-ratio: %i/%i", i_dst_num, i_dst_den );
bo_add_guid ( &bo, &asf_object_metadata_guid );
bo_addle_u64( &bo, i_cm_size );
bo_addle_u16( &bo, 2 ); /* description records count */
/* 1st description record */
bo_addle_u16( &bo, 0 ); /* reserved */
bo_addle_u16( &bo, tk->i_id ); /* stream number (0 for the whole file) */
bo_addle_u16( &bo, 2 * sizeof("AspectRatioX") ); /* name length */
bo_addle_u16( &bo, 0x3 /* DWORD */ ); /* data type */
bo_addle_u32( &bo, 4 ); /* data length */
bo_addle_str16_nosize( &bo, "AspectRatioX" );
bo_addle_u32( &bo, i_dst_num ); /* data */
/* 2nd description record */
bo_addle_u16( &bo, 0 ); /* reserved */
bo_addle_u16( &bo, tk->i_id ); /* stream number (0 for the whole file) */
bo_addle_u16( &bo, 2 * sizeof("AspectRatioY") ); /* name length */
bo_addle_u16( &bo, 0x3 /* DWORD */ ); /* data type */
bo_addle_u32( &bo, 4 ); /* data length */
bo_addle_str16_nosize( &bo, "AspectRatioY" );
bo_addle_u32( &bo, i_dst_den ); /* data */
}
/* content description header */
if( i_cd_size > 0 )
{
bo_add_guid ( &bo, &asf_object_content_description_guid );
bo_addle_u64( &bo, i_cd_size );
bo_addle_u16( &bo, 2 * strlen( p_sys->psz_title ) + 2 );
bo_addle_u16( &bo, 2 * strlen( p_sys->psz_author ) + 2 );
bo_addle_u16( &bo, 2 * strlen( p_sys->psz_copyright ) + 2 );
bo_addle_u16( &bo, 2 * strlen( p_sys->psz_comment ) + 2 );
bo_addle_u16( &bo, 2 * strlen( p_sys->psz_rating ) + 2 );
bo_addle_str16_nosize( &bo, p_sys->psz_title );
bo_addle_str16_nosize( &bo, p_sys->psz_author );
bo_addle_str16_nosize( &bo, p_sys->psz_copyright );
bo_addle_str16_nosize( &bo, p_sys->psz_comment );
bo_addle_str16_nosize( &bo, p_sys->psz_rating );
}
/* stream properties */
for( size_t i = 0; i < vlc_array_count( &p_sys->tracks ); i++ )
{
asf_track_t *tk = vlc_array_item_at_index( &p_sys->tracks, i);
bo_add_guid ( &bo, &asf_object_stream_properties_guid );
bo_addle_u64( &bo, 78 + tk->i_extra + (tk->b_audio_correction ? 8:0) );
if( tk->i_cat == AUDIO_ES )
{
bo_add_guid( &bo, &asf_object_stream_type_audio );
if( tk->b_audio_correction )
bo_add_guid( &bo, &asf_guid_audio_conceal_spread );
else
bo_add_guid( &bo, &asf_no_error_correction_guid );
}
else if( tk->i_cat == VIDEO_ES )
{
bo_add_guid( &bo, &asf_object_stream_type_video );
bo_add_guid( &bo, &asf_no_error_correction_guid );
}
bo_addle_u64( &bo, 0 ); /* time offset */
bo_addle_u32( &bo, tk->i_extra );
/* correction data length */
bo_addle_u32( &bo, tk->b_audio_correction ? 8 : 0 );
bo_addle_u16( &bo, tk->i_id ); /* stream number */
bo_addle_u32( &bo, 0 );
bo_add_mem ( &bo, tk->p_extra, tk->i_extra );
/* Error correction data field */
if( tk->b_audio_correction )
{
bo_add_u8( &bo, 0x1 ); /* span */
bo_addle_u16( &bo, tk->i_blockalign ); /* virtual packet length */
bo_addle_u16( &bo, tk->i_blockalign ); /* virtual chunk length */
bo_addle_u16( &bo, 1 ); /* silence length */
bo_add_u8( &bo, 0x0 ); /* data */
}
}
/* Codec Infos */
bo_add_guid ( &bo, &asf_object_codec_list_guid );
bo_addle_u64( &bo, i_ci_size );
bo_add_guid ( &bo, &asf_guid_reserved_2 );
bo_addle_u32( &bo, vlc_array_count( &p_sys->tracks ) );
for( size_t i = 0; i < vlc_array_count( &p_sys->tracks ); i++ )
{
asf_track_t *tk = vlc_array_item_at_index( &p_sys->tracks ,i);
if( tk->i_cat == VIDEO_ES ) bo_addle_u16( &bo, 1 /* video */ );
else if( tk->i_cat == AUDIO_ES ) bo_addle_u16( &bo, 2 /* audio */ );
else bo_addle_u16( &bo, 0xFFFF /* unknown */ );
bo_addle_str16( &bo, tk->psz_name );
bo_addle_u16( &bo, 0 );
if( tk->i_cat == AUDIO_ES )
{
bo_addle_u16( &bo, 2 );
bo_addle_u16( &bo, tk->i_tag );
}
else if( tk->i_cat == VIDEO_ES )
{
bo_addle_u16( &bo, 4 );
bo_add_mem ( &bo, (uint8_t*)&tk->i_fourcc, 4 );
}
}
/* data object */
bo_add_guid ( &bo, &asf_object_data_guid );
bo_addle_u64( &bo, 50 + p_sys->i_packet_count * p_sys->i_packet_size );
bo_add_guid ( &bo, &p_sys->fid );
bo_addle_u64( &bo, p_sys->i_packet_count );
bo_addle_u16( &bo, 0x101 );
return out;
}
/****************************************************************************
*
****************************************************************************/
static block_t *asf_packet_flush( sout_mux_t *p_mux )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
int i_pad, i_preheader = p_sys->b_asf_http ? 12 : 0;
block_t *pk;
bo_t bo;
if( !p_sys->pk ) return 0;
i_pad = p_sys->i_packet_size - p_sys->i_pk_used;
memset( p_sys->pk->p_buffer + p_sys->i_pk_used, 0, i_pad );
bo_init( &bo, p_sys->pk->p_buffer, 14 + i_preheader );
if( p_sys->b_asf_http )
asf_chunk_add( &bo, 0x4424, p_sys->i_packet_size, 0x0, p_sys->i_seq++);
bo_add_u8 ( &bo, 0x82 );
bo_addle_u16( &bo, 0 );
bo_add_u8( &bo, 0x11 );
bo_add_u8( &bo, 0x5d );
bo_addle_u16( &bo, i_pad );
bo_addle_u32( &bo, MS_FROM_VLC_TICK(p_sys->i_pk_dts - p_sys->i_dts_first) +
p_sys->i_preroll_time );
bo_addle_u16( &bo, 0 /* data->i_length */ );
bo_add_u8( &bo, 0x80 | p_sys->i_pk_frame );
pk = p_sys->pk;
p_sys->pk = NULL;
p_sys->i_packet_count++;
return pk;
}
static block_t *asf_packet_create( sout_mux_t *p_mux,
asf_track_t *tk, block_t *data )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
int i_data = data->i_buffer;
int i_pos = 0;
uint8_t *p_data= data->p_buffer;
block_t *first = NULL, **last = &first;
int i_preheader = p_sys->b_asf_http ? 12 : 0;
while( i_pos < i_data )
{
bo_t bo;
int i_payload;
if( p_sys->pk == NULL )
{
p_sys->pk = block_Alloc( p_sys->i_packet_size + i_preheader );
/* reserve 14 bytes for the packet header */
p_sys->i_pk_used = 14 + i_preheader;
p_sys->i_pk_frame = 0;
p_sys->i_pk_dts = data->i_dts;
}
bo_init( &bo, &p_sys->pk->p_buffer[p_sys->i_pk_used],
p_sys->i_packet_size - p_sys->i_pk_used );
/* add payload (header size = 17) */
i_payload = __MIN( i_data - i_pos,
p_sys->i_packet_size - p_sys->i_pk_used - 17 );
if( tk->b_audio_correction && p_sys->i_pk_frame && i_payload < i_data )
{
/* Don't know why yet but WMP doesn't like split WMA packets */
*last = asf_packet_flush( p_mux );
last = &(*last)->p_next;
continue;
}
bo_add_u8 ( &bo, !(data->i_flags & BLOCK_FLAG_TYPE_P ||
data->i_flags & BLOCK_FLAG_TYPE_B) ?
0x80 | tk->i_id : tk->i_id );
bo_add_u8 ( &bo, tk->i_sequence );
bo_addle_u32( &bo, i_pos );
bo_add_u8 ( &bo, 0x08 ); /* flags */
bo_addle_u32( &bo, i_data );
bo_addle_u32( &bo, MS_FROM_VLC_TICK(data->i_dts - p_sys->i_dts_first) +
p_sys->i_preroll_time );
bo_addle_u16( &bo, i_payload );
bo_add_mem ( &bo, &p_data[i_pos], i_payload );
i_pos += i_payload;
p_sys->i_pk_used += 17 + i_payload;
p_sys->i_pk_frame++;
if( p_sys->i_pk_used + 17 >= p_sys->i_packet_size )
{
/* Not enough data for another payload, flush the packet */
*last = asf_packet_flush( p_mux );
last = &(*last)->p_next;
}
}
tk->i_sequence++;
block_Release( data );
return first;
}
static block_t *asf_stream_end_create( sout_mux_t *p_mux )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
block_t *out = NULL;
bo_t bo;
if( p_sys->b_asf_http )
{
out = block_Alloc( 12 );
bo_init( &bo, out->p_buffer, 12 );
asf_chunk_add( &bo, 0x4524, 0, 0x00, p_sys->i_seq++ );
}
else
{
/* Create index */
out = block_Alloc( 56 );
bo_init( &bo, out->p_buffer, 56 );
bo_add_guid ( &bo, &asf_object_index_guid );
bo_addle_u64( &bo, 56 );
bo_add_guid ( &bo, &p_sys->fid );
bo_addle_u64( &bo, 10000000 );
bo_addle_u32( &bo, 5 );
bo_addle_u32( &bo, 0 );
}
return out;
}
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