* asf : asf muxer, not well tested yet.
authorLaurent Aimar <fenrir@videolan.org>
Sun, 24 Aug 2003 16:38:38 +0000 (16:38 +0000)
committerLaurent Aimar <fenrir@videolan.org>
Sun, 24 Aug 2003 16:38:38 +0000 (16:38 +0000)
modules/mux/asf.c [new file with mode: 0644]

diff --git a/modules/mux/asf.c b/modules/mux/asf.c
new file mode 100644 (file)
index 0000000..cd64fc1
--- /dev/null
@@ -0,0 +1,734 @@
+/*****************************************************************************
+ * asf.c
+ *****************************************************************************
+ * Copyright (C) 2003 VideoLAN
+ * $Id: asf.c,v 1.1 2003/08/24 16:38:38 fenrir Exp $
+ *
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <stdlib.h>
+
+#include <vlc/vlc.h>
+#include <vlc/input.h>
+#include <vlc/sout.h>
+
+#include "codecs.h"
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int  Open   ( vlc_object_t * );
+static void Close  ( vlc_object_t * );
+
+vlc_module_begin();
+    set_description( _("Asf muxer") );
+    set_capability( "sout mux", 5 );
+    add_shortcut( "asf" );
+    set_callbacks( Open, Close );
+vlc_module_end();
+
+/*****************************************************************************
+ * Locales prototypes
+ *****************************************************************************/
+static int  Capability(sout_mux_t *, int, void *, void * );
+static int  AddStream( sout_mux_t *, sout_input_t * );
+static int  DelStream( sout_mux_t *, sout_input_t * );
+static int  Mux      ( sout_mux_t * );
+
+typedef struct
+{
+    uint32_t v1; /* le */
+    uint16_t v2; /* le */
+    uint16_t v3; /* le */
+    uint8_t  v4[8];
+} guid_t;
+
+typedef struct
+{
+    int     i_id;
+    int     i_cat;
+    int     i_sequence;
+
+    int     i_extra;
+    uint8_t *p_extra;
+} asf_track_t;
+
+struct sout_mux_sys_t
+{
+    guid_t          fid;    /* file id */
+    int             i_packet_size;
+    int64_t         i_packet_count;
+    mtime_t         i_dts_first;
+
+    int             i_track;
+    asf_track_t     track[128];
+
+    vlc_bool_t      b_write_header;
+
+    sout_buffer_t   *pk;
+    int             i_pk_used;
+    int             i_pk_frame;
+    mtime_t         i_pk_dts;
+};
+
+static int MuxGetStream( sout_mux_t *, int *pi_stream, mtime_t *pi_dts );
+
+static sout_buffer_t *asf_header_create( sout_mux_t *, vlc_bool_t b_broadcast );
+static sout_buffer_t *asf_packet_create( sout_mux_t *,
+                                         asf_track_t *, sout_buffer_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 );
+
+
+/*****************************************************************************
+ * 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;
+    int i;
+
+    msg_Dbg( p_mux, "Asf muxer opened" );
+
+    p_mux->pf_capacity  = Capability;
+    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 ) );
+    p_sys->pk = NULL;
+    p_sys->i_pk_used = 0;
+    p_sys->i_pk_frame = 0;
+    p_sys->i_dts_first = -1;
+
+    p_sys->b_write_header = VLC_TRUE;
+    p_sys->i_track = 1;
+    p_sys->i_packet_size = 4096;
+    p_sys->i_packet_count= 0;
+    /* generate a random fid */
+    srand( mdate() & 0xffffffff );
+    p_sys->fid.v1 = 0xbabac001;
+    p_sys->fid.v2 = ( (uint64_t)rand() << 16 ) / RAND_MAX;
+    p_sys->fid.v3 = ( (uint64_t)rand() << 16 ) / RAND_MAX;
+    for( i = 0; i < 8; i++ )
+    {
+        p_sys->fid.v4[i] = ( (uint64_t)rand() << 8 ) / RAND_MAX;
+    }
+
+    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;
+    int i;
+
+    msg_Dbg( p_mux, "Asf muxer closed" );
+
+    /* rewrite header */
+    if( !sout_AccessOutSeek( p_mux->p_access, 0 ) )
+    {
+        sout_buffer_t *h = asf_header_create( p_mux, VLC_FALSE );
+        sout_AccessOutWrite( p_mux->p_access, h );
+    }
+
+    for( i = 1; i < p_sys->i_track; i++ )
+    {
+        free( p_sys->track[i].p_extra );
+    }
+    free( p_sys );
+}
+
+/*****************************************************************************
+ * Capability:
+ *****************************************************************************/
+static int Capability( sout_mux_t *p_mux, int i_query,
+                       void *p_args, void *p_answer )
+{
+   switch( i_query )
+   {
+        case SOUT_MUX_CAP_GET_ADD_STREAM_ANY_TIME:
+            *(vlc_bool_t*)p_answer = VLC_FALSE;
+            return( SOUT_MUX_CAP_ERR_OK );
+        default:
+            return( SOUT_MUX_CAP_ERR_UNIMPLEMENTED );
+   }
+}
+
+/*****************************************************************************
+ * 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( p_sys->i_track > 127 )
+    {
+        msg_Dbg( p_mux, "cannot add this track (too much track)" );
+        return VLC_EGENERIC;
+    }
+
+    tk = p_input->p_sys = &p_sys->track[p_sys->i_track];
+    tk->i_id  = p_sys->i_track;
+    tk->i_cat = p_input->p_fmt->i_cat;
+    tk->i_sequence = 0;
+
+    switch( tk->i_cat )
+    {
+        case AUDIO_ES:
+        {
+            uint16_t i_tag;
+            int      i_blockalign = p_input->p_fmt->i_block_align;
+            int      i_bitspersample = 0;
+
+            switch( p_input->p_fmt->i_fourcc )
+            {
+                case VLC_FOURCC( 'a', '5', '2', ' ' ):
+                    i_tag = WAVE_FORMAT_A52;
+                    break;
+                case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
+                    i_tag = WAVE_FORMAT_MPEGLAYER3;
+                    break;
+                case VLC_FOURCC( 'w', 'm', 'a', '1' ):
+                    i_tag = WAVE_FORMAT_WMA1;
+                    break;
+                case VLC_FOURCC( 'w', 'm', 'a', '2' ):
+                    i_tag = WAVE_FORMAT_WMA2;
+                    break;
+                case VLC_FOURCC( 'w', 'm', 'a', '3' ):
+                    i_tag = WAVE_FORMAT_WMA3;
+                    break;
+                    /* raw codec */
+                case VLC_FOURCC( 'u', '8', ' ', ' ' ):
+                    i_tag = WAVE_FORMAT_PCM;
+                    i_blockalign= p_input->p_fmt->i_channels;
+                    i_bitspersample = 8;
+                    break;
+                case VLC_FOURCC( 's', '1', '6', 'l' ):
+                    i_tag = WAVE_FORMAT_PCM;
+                    i_blockalign= 2 * p_input->p_fmt->i_channels;
+                    i_bitspersample = 16;
+                    break;
+                case VLC_FOURCC( 's', '2', '4', 'l' ):
+                    i_tag = WAVE_FORMAT_PCM;
+                    i_blockalign= 3 * p_input->p_fmt->i_channels;
+                    i_bitspersample = 24;
+                    break;
+                case VLC_FOURCC( 's', '3', '2', 'l' ):
+                    i_tag = WAVE_FORMAT_PCM;
+                    i_blockalign= 4 * p_input->p_fmt->i_channels;
+                    i_bitspersample = 32;
+                    break;
+                default:
+                    return VLC_EGENERIC;
+            }
+
+            tk->i_extra = sizeof( WAVEFORMATEX ) + p_input->p_fmt->i_extra_data;
+            tk->p_extra = malloc( tk->i_extra );
+            bo_init( &bo, tk->p_extra, tk->i_extra );
+            bo_addle_u16( &bo, i_tag );
+            bo_addle_u16( &bo, p_input->p_fmt->i_channels );
+            bo_addle_u32( &bo, p_input->p_fmt->i_sample_rate );
+            bo_addle_u32( &bo, p_input->p_fmt->i_bitrate / 8 );
+            bo_addle_u16( &bo, i_blockalign );
+            bo_addle_u16( &bo, i_bitspersample );
+            bo_addle_u16( &bo, p_input->p_fmt->i_extra_data );
+            bo_add_mem  ( &bo, p_input->p_fmt->p_extra_data,
+                          p_input->p_fmt->i_extra_data );
+            break;
+        }
+        case VIDEO_ES:
+        {
+            tk->i_extra = 11 + sizeof( BITMAPINFOHEADER ) +
+                          p_input->p_fmt->i_extra_data;
+            tk->p_extra = malloc( tk->i_extra );
+            bo_init( &bo, tk->p_extra, tk->i_extra );
+            bo_addle_u32( &bo, p_input->p_fmt->i_width );
+            bo_addle_u32( &bo, p_input->p_fmt->i_height );
+            bo_add_u8   ( &bo, 0x02 );  /* flags */
+            bo_addle_u16( &bo, sizeof( BITMAPINFOHEADER ) +
+                               p_input->p_fmt->i_extra_data );
+            bo_addle_u32( &bo, sizeof( BITMAPINFOHEADER ) +
+                               p_input->p_fmt->i_extra_data );
+            bo_addle_u32( &bo, p_input->p_fmt->i_width );
+            bo_addle_u32( &bo, p_input->p_fmt->i_height );
+            bo_addle_u16( &bo, 1 );
+            bo_addle_u16( &bo, 24 );
+            if( p_input->p_fmt->i_fourcc == VLC_FOURCC('m','p','4','v') )
+            {
+                bo_add_mem( &bo, "MP4S", 4 );
+            }
+            else if( p_input->p_fmt->i_fourcc == VLC_FOURCC('D','I','V','3') )
+            {
+                bo_add_mem( &bo, "MP43", 4 );
+            }
+            else
+            {
+                bo_add_mem( &bo, (uint8_t*)&p_input->p_fmt->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 );
+            bo_add_mem  ( &bo, p_input->p_fmt->p_extra_data,
+                          p_input->p_fmt->i_extra_data );
+            break;
+        }
+        default:
+            msg_Err(p_mux, "unhandled track type" );
+            return VLC_EGENERIC;
+    }
+
+    p_sys->i_track++;
+    return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * DelStream:
+ *****************************************************************************/
+static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
+{
+    msg_Dbg( p_mux, "removing input" );
+    return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * 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 )
+    {
+        sout_buffer_t *out = asf_header_create( p_mux, VLC_TRUE );
+
+        out->i_flags |= SOUT_BUFFER_FLAGS_HEADER;
+        sout_AccessOutWrite( p_mux->p_access, out );
+
+        p_sys->b_write_header = VLC_FALSE;
+    }
+
+    for( ;; )
+    {
+        sout_input_t  *p_input;
+        asf_track_t   *tk;
+        int           i_stream;
+        mtime_t       i_dts;
+        sout_buffer_t *data;
+        sout_buffer_t *pk;
+
+        if( MuxGetStream( p_mux, &i_stream, &i_dts ) )
+        {
+            /* not enough data */
+            return VLC_SUCCESS;
+        }
+
+        if( p_sys->i_dts_first < 0 )
+        {
+            p_sys->i_dts_first = i_dts;
+        }
+
+        p_input = p_mux->pp_inputs[i_stream];
+        tk      = (asf_track_t*)p_input->p_sys;
+
+        data = sout_FifoGet( p_input->p_fifo );
+
+        if( ( pk = asf_packet_create( p_mux, tk, data ) ) )
+        {
+            sout_AccessOutWrite( p_mux->p_access, pk );
+        }
+    }
+
+    return VLC_SUCCESS;
+}
+
+
+static int MuxGetStream( sout_mux_t *p_mux,
+                         int        *pi_stream,
+                         mtime_t    *pi_dts )
+{
+    mtime_t i_dts;
+    int     i_stream;
+    int     i;
+
+    for( i = 0, i_dts = 0, i_stream = -1; i < p_mux->i_nb_inputs; i++ )
+    {
+        sout_input_t  *p_input = p_mux->pp_inputs[i];
+        sout_buffer_t *p_data;
+
+        if( p_input->p_fifo->i_depth <= 0 )
+        {
+            if( p_input->p_fmt->i_cat == AUDIO_ES ||
+                p_input->p_fmt->i_cat == VIDEO_ES )
+            {
+                /* We need that audio+video fifo contain at least 1 packet */
+                return VLC_EGENERIC;
+            }
+            /* SPU */
+            continue;
+        }
+
+        p_data = sout_FifoShow( p_input->p_fifo );
+        if( i_stream == -1 ||
+            p_data->i_dts < i_dts )
+        {
+            i_stream = i;
+            i_dts    = p_data->i_dts;
+        }
+    }
+
+    *pi_stream = i_stream;
+    *pi_dts = i_dts;
+
+    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;
+}
+
+/****************************************************************************
+ * guid
+ ****************************************************************************/
+static void bo_add_guid( bo_t *p_bo, const guid_t *id )
+{
+    int i;
+    bo_addle_u32( p_bo, id->v1 );
+    bo_addle_u16( p_bo, id->v2 );
+    bo_addle_u16( p_bo, id->v3 );
+    for( i = 0; i < 8; i++ )
+    {
+        bo_add_u8( p_bo, id->v4[i] );
+    }
+}
+
+static const guid_t asf_object_header_guid =
+{
+    0x75B22630,
+    0x668E,
+    0x11CF,
+    { 0xA6,0xD9, 0x00,0xAA,0x00,0x62,0xCE,0x6C }
+};
+static const guid_t asf_object_data_guid =
+{
+    0x75B22636,
+    0x668E,
+    0x11CF,
+    { 0xA6,0xD9, 0x00,0xAA,0x00,0x62,0xCE,0x6C }
+};
+
+static const guid_t asf_object_file_properties_guid =
+{
+    0x8cabdca1,
+    0xa947,
+    0x11cf,
+    { 0x8e,0xe4, 0x00,0xC0,0x0C,0x20,0x53,0x65 }
+
+};
+static const guid_t asf_object_stream_properties_guid =
+{
+    0xB7DC0791,
+    0xA9B7,
+    0x11CF,
+    { 0x8E,0xE6, 0x00,0xC0,0x0C,0x20,0x53,0x65 }
+
+};
+static const guid_t asf_object_header_extention_guid =
+{
+   0x5FBF03B5,
+   0xA92E,
+   0x11CF,
+   { 0x8E,0xE3, 0x00,0xC0,0x0C,0x20,0x53,0x65 }
+};
+
+static const guid_t asf_object_stream_type_audio =
+{
+    0xF8699E40,
+    0x5B4D,
+    0x11CF,
+    { 0xA8,0xFD, 0x00,0x80,0x5F,0x5C,0x44,0x2B }
+};
+
+static const guid_t asf_object_stream_type_video =
+{
+    0xbc19efc0,
+    0x5B4D,
+    0x11CF,
+    { 0xA8,0xFD, 0x00,0x80,0x5F,0x5C,0x44,0x2B }
+};
+
+static const guid_t asf_guid_audio_conceal_none =
+{
+    0x20FB5700,
+    0x5B55,
+    0x11CF,
+    { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B }
+};
+static const guid_t asf_guid_video_conceal_none =
+{
+    0x20FB5700,
+    0x5B55,
+    0x11CF,
+    { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B }
+};
+static const guid_t asf_guid_reserved_1 =
+{
+    0xABD3D211,
+    0xA9BA,
+    0x11cf,
+    { 0x8E, 0xE6,0x00, 0xC0, 0x0C ,0x20, 0x53, 0x65 }
+};
+
+static sout_buffer_t *asf_header_create( sout_mux_t *p_mux,
+                                         vlc_bool_t b_broadcast )
+{
+    sout_mux_sys_t *p_sys = p_mux->p_sys;
+    asf_track_t    *tk;
+
+    int i_size;
+    sout_buffer_t *out;
+    bo_t          bo;
+    int           i;
+
+    /* calculate header size */
+    i_size = 30 + 104 + 46;
+    for( i = 1; i < p_sys->i_track; i++ )
+    {
+        i_size += 78 + p_sys->track[i].i_extra;
+    }
+    out = sout_BufferNew( p_mux->p_sout, 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 + p_sys->i_track );
+    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 + p_sys->i_packet_count *
+                                p_sys->i_packet_size ); /* file size */
+    bo_addle_u64( &bo, 0 );             /* creation date */
+    bo_addle_u64( &bo, p_sys->i_packet_count );
+    bo_addle_u64( &bo, 0 ) ;            /* play duration */
+    bo_addle_u64( &bo, 0 );             /* send duration */
+    bo_addle_u64( &bo, 10000 );         /* preroll duration */
+    bo_addle_u32( &bo, b_broadcast ? 0x01 : 0x00);      /* 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 */
+    bo_addle_u32( &bo, 0 );             /* maxbitrate */
+
+    /* header extention */
+    bo_add_guid ( &bo, &asf_object_header_extention_guid );
+    bo_addle_u64( &bo, 46 );
+    bo_add_guid ( &bo, &asf_guid_reserved_1 );
+    bo_addle_u16( &bo, 6 );
+    bo_addle_u32( &bo, 0 );
+
+    /* stream properties */
+    for( i = 1; i < p_sys->i_track; i++ )
+    {
+        tk = &p_sys->track[i];
+
+        bo_add_guid ( &bo, &asf_object_stream_properties_guid );
+        bo_addle_u64( &bo, 78 + tk->i_extra );
+        if( tk->i_cat == AUDIO_ES )
+        {
+            bo_add_guid( &bo, &asf_object_stream_type_audio );
+            bo_add_guid( &bo, &asf_guid_audio_conceal_none );
+        }
+        else if( tk->i_cat == VIDEO_ES )
+        {
+            bo_add_guid( &bo, &asf_object_stream_type_video );
+            bo_add_guid( &bo, &asf_guid_video_conceal_none );
+        }
+        bo_addle_u64( &bo, 0 );         /* time offset */
+        bo_addle_u32( &bo, tk->i_extra );
+        bo_addle_u32( &bo, 0 );         /* 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 );
+    }
+
+    /* 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 sout_buffer_t *asf_packet_create( sout_mux_t *p_mux,
+                                         asf_track_t *tk, sout_buffer_t *data )
+{
+    sout_mux_sys_t *p_sys = p_mux->p_sys;
+
+    int     i_data = data->i_size;
+    int     i_pos  = 0;
+    uint8_t *p_data= data->p_buffer;
+    sout_buffer_t *first = NULL, **last = &first;
+
+    while( i_pos < i_data )
+    {
+        bo_t          bo;
+        int           i_payload;
+
+        if( p_sys->pk == NULL )
+        {
+            p_sys->pk = sout_BufferNew( p_mux->p_sout, p_sys->i_packet_size );
+            /* reserve 14 bytes for the packet header */
+            p_sys->i_pk_used = 14;
+            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 );
+        bo_add_u8   ( &bo, 0x80 | 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, ( data->i_dts - p_sys->i_dts_first )/ 1000 );
+        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 + 14 >= p_sys->i_packet_size )
+        {
+            /* not enough data for another payload, flush the packet */
+            int i_pad = p_sys->i_packet_size - p_sys->i_pk_used;
+
+            bo_init( &bo, p_sys->pk->p_buffer, 14 );
+            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, ( p_sys->i_pk_dts - p_sys->i_dts_first )/ 1000 );
+            bo_addle_u16( &bo, 0 * data->i_length / 1000 );
+            bo_add_u8( &bo, 0x80 | p_sys->i_pk_frame );
+
+            /* append the packet */
+            *last = p_sys->pk;
+            last  = &p_sys->pk->p_next;
+
+            p_sys->pk = NULL;
+
+            p_sys->i_packet_count++;
+        }
+    }
+
+    tk->i_sequence++;
+    sout_BufferDelete( p_mux->p_sout, data );
+
+    return first;
+}
+
+
+