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/*****************************************************************************
* vc1.c : VC1 Video demuxer
*****************************************************************************
* Copyright (C) 2002-2004 VLC authors and VideoLAN
* $Id: 9360902eb2b283d0cf526e4dafb986fa2337cfb8 $
*
* 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 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 <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_demux.h>
#include <vlc_codec.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
#define FPS_TEXT N_("Frames per Second")
#define FPS_LONGTEXT N_("Desired frame rate for the VC-1 stream.")
vlc_module_begin ()
set_shortname( "VC-1")
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_DEMUX )
set_description( N_("VC1 video demuxer" ) )
set_capability( "demux", 0 )
add_float( "vc1-fps", 25.0, FPS_TEXT, FPS_LONGTEXT, true )
set_callbacks( Open, Close )
add_shortcut( "vc1" )
vlc_module_end ()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
struct demux_sys_t
{
mtime_t i_dts;
es_out_id_t *p_es;
float f_fps;
decoder_t *p_packetizer;
};
static int Demux( demux_t * );
static int Control( demux_t *, int, va_list );
#define VC1_PACKET_SIZE 4096
/*****************************************************************************
* Open: initializes demux structures
*****************************************************************************/
static int Open( vlc_object_t * p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
const uint8_t *p_peek;
es_format_t fmt;
if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
if( p_peek[0] != 0x00 || p_peek[1] != 0x00 ||
p_peek[2] != 0x01 || p_peek[3] != 0x0f ) /* Sequence header */
{
if( !p_demux->b_force )
{
msg_Warn( p_demux, "vc-1 module discarded (no startcode)" );
return VLC_EGENERIC;
}
msg_Err( p_demux, "this doesn't look like a VC-1 ES stream, "
"continuing anyway" );
}
p_sys = malloc( sizeof( demux_sys_t ) );
if( unlikely(p_sys == NULL) )
return VLC_ENOMEM;
p_demux->pf_demux = Demux;
p_demux->pf_control= Control;
p_demux->p_sys = p_sys;
p_sys->p_es = NULL;
p_sys->i_dts = 0;
p_sys->f_fps = var_CreateGetFloat( p_demux, "vc1-fps" );
if( p_sys->f_fps < 0.001 )
p_sys->f_fps = 0.0;
/* Load the packetizer */
es_format_Init( &fmt, VIDEO_ES, VLC_CODEC_VC1 );
p_sys->p_packetizer = demux_PacketizerNew( p_demux, &fmt, "VC-1" );
if( !p_sys->p_packetizer )
{
free( p_sys );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: frees unused data
*****************************************************************************/
static void Close( vlc_object_t * p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
demux_PacketizerDestroy( p_sys->p_packetizer );
free( p_sys );
}
/*****************************************************************************
* Demux: reads and demuxes data packets
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*****************************************************************************/
static int Demux( demux_t *p_demux)
{
demux_sys_t *p_sys = p_demux->p_sys;
block_t *p_block_in, *p_block_out;
if( ( p_block_in = stream_Block( p_demux->s, VC1_PACKET_SIZE ) ) == NULL )
return 0;
/* */
p_block_in->i_dts = VLC_TS_0;
p_block_in->i_pts = VLC_TS_0;
while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
{
while( p_block_out )
{
block_t *p_next = p_block_out->p_next;
p_block_out->p_next = NULL;
if( p_sys->p_es == NULL )
{
p_sys->p_packetizer->fmt_out.b_packetized = true;
p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_out);
}
es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + p_sys->i_dts );
p_block_out->i_dts = VLC_TS_0 + p_sys->i_dts;
p_block_out->i_pts = VLC_TS_0 + p_sys->i_dts;
es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
p_block_out = p_next;
if( p_sys->p_packetizer->fmt_out.video.i_frame_rate > 0 &&
p_sys->p_packetizer->fmt_out.video.i_frame_rate_base > 0 )
p_sys->i_dts += INT64_C(1000000) *
p_sys->p_packetizer->fmt_out.video.i_frame_rate_base /
p_sys->p_packetizer->fmt_out.video.i_frame_rate;
else if( p_sys->f_fps > 0.001 )
p_sys->i_dts += (int64_t)((double)1000000.0 / p_sys->f_fps);
else
p_sys->i_dts += INT64_C(1000000) / 25;
}
}
return 1;
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( demux_t *p_demux, int i_query, va_list args )
{
/* demux_sys_t *p_sys = p_demux->p_sys; */
/* FIXME calculate the bitrate */
if( i_query == DEMUX_SET_TIME )
return VLC_EGENERIC;
else
return demux_vaControlHelper( p_demux->s,
0, -1,
0, 1, i_query, args );
}
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