/*****************************************************************************
* mpga.c : MPEG-I/II Audio input module for vlc
*****************************************************************************
- * Copyright (C) 2001-2004 VideoLAN
+ * Copyright (C) 2001-2004 the VideoLAN team
* $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* 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.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
#include <stdlib.h> /* malloc(), free() */
#include <vlc/vlc.h>
-#include <vlc/input.h>
-#include "vlc_codec.h"
-#include "vlc_meta.h"
+#include <vlc_demux.h>
+#include <vlc_codec.h>
+#include <vlc_meta.h>
-#define MPGA_PACKET_SIZE 4096
+#define MPGA_PACKET_SIZE 1024
/*****************************************************************************
* Module descriptor
vlc_module_begin();
set_category( CAT_INPUT );
set_subcategory( SUBCAT_INPUT_DEMUX );
- set_description( _("MPEG-I/II audio demuxer" ) );
+ set_description( _("MPEG audio / MP3 demuxer" ) );
set_capability( "demux2", 100 );
set_callbacks( Open, Close );
add_shortcut( "mpga" );
mtime_t i_time_offset;
int i_bitrate_avg; /* extracted from Xing header */
+ vlc_bool_t b_initial_sync_failed;
+
int i_xing_frames;
int i_xing_bytes;
int i_xing_bitrate_avg;
}
}
+
/*****************************************************************************
* Open: initializes demux structures
*****************************************************************************/
uint32_t header;
uint8_t *p_peek;
module_t *p_id3;
- vlc_meta_t *p_meta = NULL;
block_t *p_block_in, *p_block_out;
if( p_demux->psz_path )
}
}
- /* Skip/parse possible id3 header */
- if( ( p_id3 = module_Need( p_demux, "id3", NULL, 0 ) ) )
- {
- p_meta = (vlc_meta_t *)p_demux->p_private;
- p_demux->p_private = NULL;
- module_Unneed( p_demux, p_id3 );
- }
-
- if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 )
- {
- if( p_meta ) vlc_meta_Delete( p_meta );
- return VLC_EGENERIC;
- }
+ if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
if( !HeaderCheck( header = GetDWBE( p_peek ) ) )
{
vlc_bool_t b_ok = VLC_FALSE;
int i_peek;
- if( !p_demux->b_force && !b_forced )
- {
- if( p_meta ) vlc_meta_Delete( p_meta );
- return VLC_EGENERIC;
- }
+ if( !p_demux->b_force && !b_forced ) return VLC_EGENERIC;
i_peek = stream_Peek( p_demux->s, &p_peek, 8096 );
while( i_peek > 4 )
p_peek += 1;
i_peek -= 1;
}
- if( !b_ok && !p_demux->b_force )
- {
- if( p_meta ) vlc_meta_Delete( p_meta );
- return VLC_EGENERIC;
- }
+ if( !b_ok && !p_demux->b_force ) return VLC_EGENERIC;
}
- p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
+ STANDARD_DEMUX_INIT; p_sys = p_demux->p_sys;
memset( p_sys, 0, sizeof( demux_sys_t ) );
p_sys->p_es = 0;
- p_sys->p_packetizer = 0;
p_sys->b_start = VLC_TRUE;
- p_sys->meta = p_meta;
- p_demux->pf_demux = Demux;
- p_demux->pf_control = Control;
-
- /*
- * Load the mpeg audio packetizer
- */
- p_sys->p_packetizer = vlc_object_create( p_demux, VLC_OBJECT_PACKETIZER );
- p_sys->p_packetizer->pf_decode_audio = NULL;
- p_sys->p_packetizer->pf_decode_video = NULL;
- p_sys->p_packetizer->pf_decode_sub = NULL;
- p_sys->p_packetizer->pf_packetize = NULL;
- es_format_Init( &p_sys->p_packetizer->fmt_in, AUDIO_ES,
- VLC_FOURCC( 'm', 'p', 'g', 'a' ) );
- es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
- p_sys->p_packetizer->p_module =
- module_Need( p_sys->p_packetizer, "packetizer", NULL, 0 );
+ p_sys->meta = 0;
- if( p_sys->p_packetizer->p_module == NULL )
- {
- msg_Err( p_demux, "cannot find mpga packetizer" );
- Close( VLC_OBJECT(p_demux ) );
- return VLC_EGENERIC;
- }
+ /* Load the mpeg audio packetizer */
+ INIT_APACKETIZER( p_sys->p_packetizer, 'm', 'p', 'g', 'a' );
+ es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
+ LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "mpga" );
/* Xing header */
if( HeaderCheck( header ) )
i_skip = MPGA_MODE( header ) != 3 ? 21 : 13;
}
- if( i_skip + 8 < i_xing && !strncmp( &p_xing[i_skip], "Xing", 4 ) )
+ if( i_skip + 8 < i_xing && !strncmp( (char *)&p_xing[i_skip], "Xing", 4 ) )
{
unsigned int i_flags = GetDWBE( &p_xing[i_skip+4] );
p_block_in->i_pts = p_block_in->i_dts = 1;
p_block_out = p_sys->p_packetizer->pf_packetize(
p_sys->p_packetizer, &p_block_in );
-
+
+ if( p_block_out == NULL )
+ {
+ msg_Dbg( p_demux, "did not sync on first block" );
+ p_sys->b_initial_sync_failed = VLC_TRUE;
+ }
+ else
+ p_sys->b_initial_sync_failed = VLC_FALSE;
+
p_sys->p_packetizer->fmt_out.b_packetized = VLC_TRUE;
p_sys->p_es = es_out_Add( p_demux->out,
&p_sys->p_packetizer->fmt_out);
p_sys->i_bitrate_avg = p_sys->p_packetizer->fmt_out.i_bitrate;
-
+
if( p_sys->i_xing_bytes && p_sys->i_xing_frames &&
p_sys->i_xing_frame_samples )
{
p_sys->p_block_in = p_block_in;
p_sys->p_block_out = p_block_out;
+ /* Parse possible id3 header */
+ if( ( p_id3 = module_Need( p_demux, "meta reader", NULL, 0 ) ) )
+ {
+ p_sys->meta = (vlc_meta_t *)p_demux->p_private;
+ p_demux->p_private = NULL;
+ module_Unneed( p_demux, p_id3 );
+ }
+
return VLC_SUCCESS;
}
{
p_sys->b_start = VLC_FALSE;
p_block_in = p_sys->p_block_in;
+ p_sys->p_block_in = NULL;
p_block_out = p_sys->p_block_out;
+ p_sys->p_block_out = NULL;
}
else
{
{
return 0;
}
- p_block_in->i_pts = p_block_in->i_dts = 0;
+ if( p_demux->p_sys->b_initial_sync_failed == VLC_TRUE )
+ {
+ p_block_in->i_pts = p_block_in->i_dts = 1;
+ /* Only try to resync once */
+ p_demux->p_sys->b_initial_sync_failed = 0;
+ }
+ else
+ p_block_in->i_pts = p_block_in->i_dts = 0;
p_block_out = p_sys->p_packetizer->pf_packetize(
p_sys->p_packetizer, &p_block_in );
}
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
+ DESTROY_PACKETIZER( p_sys->p_packetizer );
if( p_sys->meta ) vlc_meta_Delete( p_sys->meta );
-
- if( p_sys->p_packetizer && p_sys->p_packetizer->p_module )
- module_Unneed( p_sys->p_packetizer, p_sys->p_packetizer->p_module );
- if( p_sys->p_packetizer )
- vlc_object_destroy( p_sys->p_packetizer );
+ if( p_sys->p_block_out ) block_Release( p_sys->p_block_out );
free( p_sys );
}
{
demux_sys_t *p_sys = p_demux->p_sys;
int64_t *pi64;
- vlc_meta_t **pp_meta;
+ vlc_meta_t *p_meta;
int i_ret;
switch( i_query )
{
case DEMUX_GET_META:
- pp_meta = (vlc_meta_t **)va_arg( args, vlc_meta_t** );
- if( p_sys->meta ) *pp_meta = vlc_meta_Duplicate( p_sys->meta );
- else *pp_meta = NULL;
+ p_meta = (vlc_meta_t *)va_arg( args, vlc_meta_t* );
+ vlc_meta_Merge( p_meta, p_sys->meta );
return VLC_SUCCESS;
case DEMUX_GET_TIME:
i_ret = demux2_vaControlHelper( p_demux->s, 0, -1,
p_sys->i_bitrate_avg, 1, i_query,
args );
+ /* No bitrate, we can't have it precisely, but we can compute
+ * a raw approximation with time/position */
+ if( i_ret && i_query == DEMUX_GET_LENGTH &&!p_sys->i_bitrate_avg )
+ {
+ float f_pos = (double)( stream_Tell( p_demux->s ) ) /
+ (double)( stream_Size( p_demux->s ) );
+ /* The first few seconds are guaranteed to be very whacky,
+ * don't bother trying ... Too bad */
+ if( f_pos < 0.01 ||
+ (p_sys->i_pts + p_sys->i_time_offset) < 8000000 )
+ return VLC_EGENERIC;
+
+ pi64 = (int64_t *)va_arg( args, int64_t * );
+ *pi64 = (p_sys->i_pts + p_sys->i_time_offset) / f_pos;
+ return VLC_SUCCESS;
+ }
if( !i_ret && p_sys->i_bitrate_avg > 0 &&
(i_query == DEMUX_SET_POSITION || i_query == DEMUX_SET_TIME) )
{
projects / vlc / blobdiff