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Commit 277ca571 authored by Christophe Massiot's avatar Christophe Massiot
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* modules/packetizer/mpegvideo.c: Detect discontinuities and trash 

  corrupt packets. Also flag GOP headers with SOUT_BUFFER_FLAGS_GOP.
parent 1fa786db
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Showing with 36 additions and 4 deletions
include/stream_output.h
View file @ 277ca571
......@@ -2,7 +2,7 @@
* stream_output.h : stream output module
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: stream_output.h,v 1.14 2003/09/12 18:34:44 fenrir Exp $
* $Id: stream_output.h,v 1.15 2003/11/07 16:53:54 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Laurent Aimar <fenrir@via.ecp.fr>
......@@ -37,6 +37,7 @@
*
*/
#define SOUT_BUFFER_FLAGS_HEADER 0x0001
#define SOUT_BUFFER_FLAGS_GOP 0x0002
/*
* Flags for muxer/access private usage.
......
modules/packetizer/mpegvideo.c
View file @ 277ca571
......@@ -2,7 +2,7 @@
* mpegvideo.c
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: mpegvideo.c,v 1.19 2003/09/02 20:19:26 gbazin Exp $
* $Id: mpegvideo.c,v 1.20 2003/11/07 16:53:54 massiot Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
......@@ -70,6 +70,7 @@ typedef struct packetizer_s
uint8_t p_sequence_header[150];
int i_sequence_header_length;
int i_last_sequence_header;
vlc_bool_t b_expect_discontinuity;
} packetizer_t;
......@@ -79,6 +80,7 @@ static int Run ( decoder_fifo_t * );
static int InitThread ( packetizer_t * );
static void PacketizeThread ( packetizer_t * );
static void EndThread ( packetizer_t * );
static void BitstreamCallback ( bit_stream_t *, vlc_bool_t );
/*****************************************************************************
* Module descriptor
......@@ -178,10 +180,11 @@ static int InitThread( packetizer_t *p_pack )
p_pack->output_format.i_extra_data = 0;
p_pack->output_format.p_extra_data = NULL;
p_pack->b_expect_discontinuity = 0;
p_pack->p_sout_input = NULL;
if( InitBitstream( &p_pack->bit_stream, p_pack->p_fifo,
NULL, NULL ) != VLC_SUCCESS )
BitstreamCallback, (void *)p_pack ) != VLC_SUCCESS )
{
msg_Err( p_pack->p_fifo, "cannot initialize bitstream" );
return -1;
......@@ -381,6 +384,7 @@ static void PacketizeThread( packetizer_t *p_pack )
i_pos += p_pack->i_sequence_header_length;
p_pack->i_last_sequence_header = 0;
}
p_sout_buffer->i_flags |= SOUT_BUFFER_FLAGS_GOP;
CopyUntilNextStartCode( p_pack, p_sout_buffer, &i_pos );
}
else if( i_code == 0x100 ) /* Picture */
......@@ -528,7 +532,16 @@ static void PacketizeThread( packetizer_t *p_pack )
p_sout_buffer->i_length );
#endif
sout_InputSendBuffer( p_pack->p_sout_input, p_sout_buffer );
if ( p_pack->b_expect_discontinuity )
{
msg_Warn( p_pack->p_fifo, "discontinuity encountered, dropping a frame" );
p_pack->b_expect_discontinuity = 0;
sout_BufferDelete( p_pack->p_sout_input->p_sout, p_sout_buffer );
}
else
{
sout_InputSendBuffer( p_pack->p_sout_input, p_sout_buffer );
}
}
......@@ -542,3 +555,21 @@ static void EndThread ( packetizer_t *p_pack)
sout_InputDelete( p_pack->p_sout_input );
}
}
/*****************************************************************************
* BitstreamCallback: Import parameters from the new data/PES packet
*****************************************************************************
* This function is called by input's NextDataPacket.
*****************************************************************************/
static void BitstreamCallback ( bit_stream_t * p_bit_stream,
vlc_bool_t b_new_pes )
{
packetizer_t * p_pack = (packetizer_t *)p_bit_stream->p_callback_arg;
if( p_bit_stream->p_data->b_discard_payload
|| (b_new_pes && p_bit_stream->p_pes->b_discontinuity) )
{
p_pack->b_expect_discontinuity = 1;
}
}
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