/*****************************************************************************
* mpegvideo.c: parse and packetize an MPEG1/2 video stream
*****************************************************************************
- * Copyright (C) 2001, 2002 VideoLAN
- * $Id: mpegvideo.c,v 1.26 2004/01/25 17:41:30 murray Exp $
+ * Copyright (C) 2001-2006 the VideoLAN team
+ * $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
- * Gildas Bazin <gbazin@netcourrier.com>
+ * Gildas Bazin <gbazin@videolan.org>
+ * Jean-Paul Saman <jpsaman #_at_# m2x dot nl>
*
* 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
*
* 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.
*****************************************************************************/
/*****************************************************************************
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h> /* malloc(), free() */
-#include <vlc/vlc.h>
-#include <vlc/decoder.h>
-#include <vlc/input.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_block.h>
+#include <vlc_codec.h>
+#include <vlc_block_helper.h>
+#include "../codec/cc.h"
-#include "vlc_block_helper.h"
+#define SYNC_INTRAFRAME_TEXT N_("Sync on Intra Frame")
+#define SYNC_INTRAFRAME_LONGTEXT N_("Normally the packetizer would " \
+ "sync on the next full frame. This flags instructs the packetizer " \
+ "to sync on the first Intra Frame found.")
/*****************************************************************************
* Module descriptor
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
-vlc_module_begin();
- set_description( _("MPEG-I/II Video Packetizer") );
- set_capability( "packetizer", 50 );
- set_callbacks( Open, Close );
-vlc_module_end();
+vlc_module_begin ()
+ set_category( CAT_SOUT )
+ set_subcategory( SUBCAT_SOUT_PACKETIZER )
+ set_description( N_("MPEG-I/II video packetizer") )
+ set_capability( "packetizer", 50 )
+ set_callbacks( Open, Close )
+
+ add_bool( "packetizer-mpegvideo-sync-iframe", 0, NULL, SYNC_INTRAFRAME_TEXT,
+ SYNC_INTRAFRAME_LONGTEXT, true );
+vlc_module_end ()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static block_t *Packetize( decoder_t *, block_t ** );
static block_t *ParseMPEGBlock( decoder_t *, block_t * );
+static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] );
struct decoder_sys_t
{
*/
block_bytestream_t bytestream;
int i_state;
- int i_offset;
+ size_t i_offset;
uint8_t p_startcode[3];
- /* Sequence header and extention */
+ /* Sequence header and extension */
block_t *p_seq;
block_t *p_ext;
/* Current frame being built */
block_t *p_frame;
- vlc_bool_t b_frame_slice;
+ block_t **pp_last;
+
+ bool b_frame_slice;
mtime_t i_pts;
mtime_t i_dts;
/* Sequence properties */
int i_frame_rate;
int i_frame_rate_base;
- vlc_bool_t b_seq_progressive;
- vlc_bool_t b_low_delay;
+ bool b_seq_progressive;
+ bool b_low_delay;
int i_aspect_ratio_info;
+ bool b_inited;
/* Picture properties */
int i_temporal_ref;
int i_progressive_frame;
mtime_t i_interpolated_dts;
- mtime_t i_old_duration;
mtime_t i_last_ref_pts;
+ bool b_second_field;
- /* Number of pictues since last sequence header */
+ /* Number of pictures since last sequence header */
int i_seq_old;
+ /* Sync behaviour */
+ bool b_sync_on_intra_frame;
+ bool b_discontinuity;
+
+ /* */
+ bool b_cc_reset;
+ uint32_t i_cc_flags;
+ mtime_t i_cc_pts;
+ mtime_t i_cc_dts;
+ cc_data_t cc;
};
enum {
es_format_Init( &p_dec->fmt_out, VIDEO_ES, VLC_FOURCC('m','p','g','v') );
p_dec->pf_packetize = Packetize;
+ p_dec->pf_get_cc = GetCc;
p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
+ if( !p_dec->p_sys )
+ return VLC_ENOMEM;
+ memset( p_dec->p_sys, 0, sizeof( decoder_sys_t ) );
/* Misc init */
p_sys->i_state = STATE_NOSYNC;
- p_sys->bytestream = block_BytestreamInit( p_dec );
+ p_sys->bytestream = block_BytestreamInit();
p_sys->p_startcode[0] = 0;
p_sys->p_startcode[1] = 0;
p_sys->p_startcode[2] = 1;
p_sys->p_seq = NULL;
p_sys->p_ext = NULL;
p_sys->p_frame = NULL;
- p_sys->b_frame_slice = VLC_FALSE;
+ p_sys->pp_last = &p_sys->p_frame;
+ p_sys->b_frame_slice = false;
p_sys->i_dts = p_sys->i_pts = 0;
p_sys->i_frame_rate = 1;
p_sys->i_frame_rate_base = 1;
- p_sys->b_seq_progressive = VLC_TRUE;
- p_sys->b_low_delay = VLC_TRUE;
+ p_sys->b_seq_progressive = true;
+ p_sys->b_low_delay = true;
p_sys->i_seq_old = 0;
p_sys->i_temporal_ref = 0;
p_sys->i_top_field_first = 0;
p_sys->i_repeat_first_field = 0;
p_sys->i_progressive_frame = 0;
+ p_sys->b_inited = 0;
p_sys->i_interpolated_dts = 0;
- p_sys->i_old_duration = 0;
p_sys->i_last_ref_pts = 0;
+ p_sys->b_second_field = 0;
+
+ p_sys->b_discontinuity = false;
+ p_sys->b_sync_on_intra_frame = var_CreateGetBool( p_dec, "packetizer-mpegvideo-sync-iframe" );
+ if( p_sys->b_sync_on_intra_frame )
+ msg_Dbg( p_dec, "syncing on intra frame now" );
+
+ p_sys->b_cc_reset = false;
+ p_sys->i_cc_pts = 0;
+ p_sys->i_cc_dts = 0;
+ p_sys->i_cc_flags = 0;
+ cc_Init( &p_sys->cc );
return VLC_SUCCESS;
}
block_ChainRelease( p_sys->p_frame );
}
+ var_Destroy( p_dec, "packetizer-mpegvideo-sync-iframe" );
+
free( p_sys );
}
return NULL;
}
- if( (*pp_block)->b_discontinuity )
+ if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
{
- p_sys->i_state = STATE_NOSYNC;
- if( p_sys->p_frame ) block_ChainRelease( p_sys->p_frame );
- p_sys->p_frame = NULL;
- p_sys->b_frame_slice = VLC_FALSE;
+ if( (*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED )
+ {
+ p_sys->i_state = STATE_NOSYNC;
+ block_BytestreamFlush( &p_sys->bytestream );
+
+ p_sys->b_discontinuity = true;
+ if( p_sys->p_frame )
+ block_ChainRelease( p_sys->p_frame );
+ p_sys->p_frame = NULL;
+ p_sys->pp_last = &p_sys->p_frame;
+ p_sys->b_frame_slice = false;
+ }
+// p_sys->i_interpolated_dts =
+// p_sys->i_last_ref_pts = 0;
+
+ block_Release( *pp_block );
+ return NULL;
}
+
block_BytestreamPush( &p_sys->bytestream, *pp_block );
while( 1 )
/* Get the new fragment and set the pts/dts */
p_pic = block_New( p_dec, p_sys->i_offset );
+ block_BytestreamFlush( &p_sys->bytestream );
p_pic->i_pts = p_sys->bytestream.p_block->i_pts;
p_pic->i_dts = p_sys->bytestream.p_block->i_dts;
break;
}
+ /* If a discontinuity has been encountered, then wait till
+ * the next Intra frame before continuing with packetizing */
+ if( p_sys->b_discontinuity &&
+ p_sys->b_sync_on_intra_frame )
+ {
+ if( p_pic->i_flags & BLOCK_FLAG_TYPE_I )
+ {
+ msg_Dbg( p_dec, "synced on intra frame" );
+ p_sys->b_discontinuity = false;
+ p_pic->i_flags |= BLOCK_FLAG_DISCONTINUITY;
+ }
+ else
+ {
+ msg_Dbg( p_dec, "waiting on intra frame" );
+ p_sys->i_state = STATE_NOSYNC;
+ block_Release( p_pic );
+ break;
+ }
+ }
+
/* We've just started the stream, wait for the first PTS.
* We discard here so we can still get the sequence header. */
if( p_sys->i_dts <= 0 && p_sys->i_pts <= 0 &&
break;
}
+ /* When starting the stream we can have the first frame with
+ * a null DTS (i_interpolated_pts is initialized to 0) */
+ if( !p_pic->i_dts ) p_pic->i_dts = p_pic->i_pts;
+
/* So p_block doesn't get re-added several times */
*pp_block = block_BytestreamPop( &p_sys->bytestream );
}
}
+/*****************************************************************************
+ * GetCc:
+ *****************************************************************************/
+static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ block_t *p_cc;
+ int i;
+
+ for( i = 0; i < 4; i++ )
+ pb_present[i] = p_sys->cc.pb_present[i];
+
+ if( p_sys->cc.i_data <= 0 )
+ return NULL;
+
+ p_cc = block_New( p_dec, p_sys->cc.i_data);
+ if( p_cc )
+ {
+ memcpy( p_cc->p_buffer, p_sys->cc.p_data, p_sys->cc.i_data );
+ p_cc->i_dts =
+ p_cc->i_pts = p_sys->cc.b_reorder ? p_sys->i_cc_pts : p_sys->i_cc_dts;
+ p_cc->i_flags = ( p_sys->cc.b_reorder ? p_sys->i_cc_flags : BLOCK_FLAG_TYPE_P ) & ( BLOCK_FLAG_TYPE_I|BLOCK_FLAG_TYPE_P|BLOCK_FLAG_TYPE_B);
+ }
+ cc_Flush( &p_sys->cc );
+ return p_cc;
+}
+
/*****************************************************************************
* ParseMPEGBlock: Re-assemble fragments into a block containing a picture
*****************************************************************************/
msg_Dbg( p_dec, "waiting for sequence start" );
if( p_sys->p_frame ) block_ChainRelease( p_sys->p_frame );
p_sys->p_frame = NULL;
- p_sys->b_frame_slice = VLC_FALSE;
+ p_sys->pp_last = &p_sys->p_frame;
+ p_sys->b_frame_slice = false;
}
else if( p_sys->b_frame_slice &&
(p_frag->p_buffer[3] == 0x00 || p_frag->p_buffer[3] > 0xaf) )
{
+ const bool b_eos = p_frag->p_buffer[3] == 0xb7;
+
mtime_t i_duration;
+ if( b_eos )
+ {
+ block_ChainLastAppend( &p_sys->pp_last, p_frag );
+ p_frag = NULL;
+ }
+
p_pic = block_ChainGather( p_sys->p_frame );
+ if( b_eos )
+ p_pic->i_flags |= BLOCK_FLAG_END_OF_SEQUENCE;
+
i_duration = (mtime_t)( 1000000 * p_sys->i_frame_rate_base /
p_sys->i_frame_rate );
else
{
/* Correct interpolated dts when we receive a new pts/dts */
- if( p_sys->i_last_ref_pts > 0 )
+ if( p_sys->i_last_ref_pts > 0 && !p_sys->b_second_field )
p_sys->i_interpolated_dts = p_sys->i_last_ref_pts;
if( p_sys->i_dts > 0 ) p_sys->i_interpolated_dts = p_sys->i_dts;
- p_sys->i_last_ref_pts = p_sys->i_pts;
+ if( !p_sys->b_second_field )
+ p_sys->i_last_ref_pts = p_sys->i_pts;
}
p_pic->i_dts = p_sys->i_interpolated_dts;
+ p_sys->i_interpolated_dts += i_duration;
/* Set PTS only if we have a B frame or if it comes from the stream */
if( p_sys->i_pts > 0 )
p_pic->i_pts = 0;
}
- if( p_sys->b_low_delay || p_sys->i_picture_type == 0x03 )
+ switch ( p_sys->i_picture_type )
{
- /* Trivial case (DTS == PTS) */
- p_sys->i_interpolated_dts += i_duration;
- }
- else
- {
- p_sys->i_interpolated_dts += p_sys->i_old_duration;
- p_sys->i_old_duration = i_duration;
+ case 0x01:
+ p_pic->i_flags |= BLOCK_FLAG_TYPE_I;
+ break;
+ case 0x02:
+ p_pic->i_flags |= BLOCK_FLAG_TYPE_P;
+ break;
+ case 0x03:
+ p_pic->i_flags |= BLOCK_FLAG_TYPE_B;
+ break;
}
p_pic->i_length = p_sys->i_interpolated_dts - p_pic->i_dts;
#if 0
- msg_Dbg( p_dec, "pic: type=%d dts="I64Fd" pts-dts="I64Fd,
+ msg_Dbg( p_dec, "pic: type=%d dts=%"PRId64" pts-dts=%"PRId64,
p_sys->i_picture_type, p_pic->i_dts, p_pic->i_pts - p_pic->i_dts);
#endif
/* Reset context */
p_sys->p_frame = NULL;
- p_sys->b_frame_slice = VLC_FALSE;
+ p_sys->pp_last = &p_sys->p_frame;
+ p_sys->b_frame_slice = false;
+
+ if( p_sys->i_picture_structure != 0x03 )
+ {
+ p_sys->b_second_field = !p_sys->b_second_field;
+ }
+ else
+ {
+ p_sys->b_second_field = 0;
+ }
+
+ /* CC */
+ p_sys->b_cc_reset = true;
+ p_sys->i_cc_pts = p_pic->i_pts;
+ p_sys->i_cc_dts = p_pic->i_dts;
+ p_sys->i_cc_flags = p_pic->i_flags;
+ }
+
+ if( !p_pic && p_sys->b_cc_reset )
+ {
+ p_sys->b_cc_reset = false;
+ cc_Flush( &p_sys->cc );
}
+ if( !p_frag )
+ return p_pic;
/*
* Check info of current fragment
*/
p_sys->i_seq_old > p_sys->i_frame_rate/p_sys->i_frame_rate_base )
{
/* Usefull for mpeg1: repeat sequence header every second */
- block_ChainAppend( &p_sys->p_frame,
- block_Duplicate( p_sys->p_seq ) );
+ block_ChainLastAppend( &p_sys->pp_last, block_Duplicate( p_sys->p_seq ) );
if( p_sys->p_ext )
{
- block_ChainAppend( &p_sys->p_frame,
- block_Duplicate( p_sys->p_ext ) );
+ block_ChainLastAppend( &p_sys->pp_last, block_Duplicate( p_sys->p_ext ) );
}
p_sys->i_seq_old = 0;
p_sys->i_frame_rate_base =
code_to_frame_rate[p_frag->p_buffer[7]&0x0f][1];
- p_sys->b_seq_progressive = VLC_TRUE;
- p_sys->b_low_delay = VLC_TRUE;
+ p_dec->fmt_out.video.i_frame_rate = p_sys->i_frame_rate;
+ p_dec->fmt_out.video.i_frame_rate_base = p_sys->i_frame_rate_base;
-#if 0
- msg_Dbg( p_dec, "Size %dx%d fps=%.3f",
+ p_sys->b_seq_progressive = true;
+ p_sys->b_low_delay = true;
+
+ if ( !p_sys->b_inited )
+ {
+ msg_Dbg( p_dec, "size %dx%d fps=%.3f",
p_dec->fmt_out.video.i_width, p_dec->fmt_out.video.i_height,
p_sys->i_frame_rate / (float)p_sys->i_frame_rate_base );
-#endif
+ p_sys->b_inited = 1;
+ }
}
else if( p_frag->p_buffer[3] == 0xb5 )
{
int i_type = p_frag->p_buffer[4] >> 4;
- /* Extention start code */
+ /* Extension start code */
if( i_type == 0x01 )
{
+#if 0
static const int mpeg2_aspect[16][2] =
{
{0,1}, {1,1}, {4,3}, {16,9}, {221,100},
{0,1}, {0,1}, {0,1}, {0,1}, {0,1}, {0,1}, {0,1}, {0,1}, {0,1},
{0,1}, {0,1}
};
+#endif
- /* sequence extention */
+ /* sequence extension */
if( p_sys->p_ext) block_Release( p_sys->p_ext );
p_sys->p_ext = block_Duplicate( p_frag );
if( p_frag->i_buffer >= 10 )
{
p_sys->b_seq_progressive =
- p_frag->p_buffer[5]&0x08 ? VLC_TRUE : VLC_FALSE;
+ p_frag->p_buffer[5]&0x08 ? true : false;
p_sys->b_low_delay =
- p_frag->p_buffer[9]&0x80 ? VLC_TRUE : VLC_FALSE;
+ p_frag->p_buffer[9]&0x80 ? true : false;
}
+ /* Do not set aspect ratio : in case we're transcoding,
+ * transcode will take our fmt_out as a fmt_in to libmpeg2.
+ * libmpeg2.c will then believe that the user has requested
+ * a specific aspect ratio, which she hasn't. Thus in case
+ * of aspect ratio change, we're screwed. --Meuuh
+ */
+#if 0
p_dec->fmt_out.video.i_aspect =
mpeg2_aspect[p_sys->i_aspect_ratio_info][0] *
VOUT_ASPECT_FACTOR /
mpeg2_aspect[p_sys->i_aspect_ratio_info][1];
+#endif
}
else if( i_type == 0x08 )
{
- /* picture extention */
+ /* picture extension */
p_sys->i_picture_structure = p_frag->p_buffer[6]&0x03;
p_sys->i_top_field_first = p_frag->p_buffer[7] >> 7;
p_sys->i_repeat_first_field= (p_frag->p_buffer[7]>>1)&0x01;
p_sys->i_progressive_frame = p_frag->p_buffer[8] >> 7;
}
}
+ else if( p_frag->p_buffer[3] == 0xb2 && p_frag->i_buffer > 4 )
+ {
+ cc_Extract( &p_sys->cc, &p_frag->p_buffer[4], p_frag->i_buffer - 4 );
+ }
else if( p_frag->p_buffer[3] == 0x00 )
{
/* Picture start code */
else if( p_frag->p_buffer[3] >= 0x01 && p_frag->p_buffer[3] <= 0xaf )
{
/* Slice start code */
- p_sys->b_frame_slice = VLC_TRUE;
+ p_sys->b_frame_slice = true;
}
/* Append the block */
- block_ChainAppend( &p_sys->p_frame, p_frag );
+ block_ChainLastAppend( &p_sys->pp_last, p_frag );
return p_pic;
}
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