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* avi: May fix #1545

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(From mplayer:
    "count blocks by rounded-up chunksizes instead of chunks -
     we need full emulation of dshow avi demuxer bugs :(
     fixes silly nandub-style a-v delaying in avi with vbr mp3..." )
This commit is contained in:
Laurent Aimar 2004-01-04 17:35:02 +00:00
parent f78730a8cc
commit 13f5cc43d3
2 changed files with 66 additions and 4 deletions
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65
modules/demux/avi/avi.c
View File

@ -2,7 +2,7 @@
* avi.c : AVI file Stream input module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
* $Id: avi.c,v 1.82 2003/12/22 02:24:52 sam Exp $
* $Id: avi.c,v 1.83 2004/01/04 17:35:01 fenrir Exp $
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify
@ -100,6 +100,15 @@ static mtime_t AVI_MovieGetLength( input_thread_t * );
static int AVI_TrackSeek ( input_thread_t *, int, mtime_t );
static int AVI_TrackStopFinishedStreams( input_thread_t *);
/* Remarks:
- For VBR mp3 stream:
count blocks by rounded-up chunksizes instead of chunks
we need full emulation of dshow avi demuxer bugs :(
fixes silly nandub-style a-v delaying in avi with vbr mp3...
(from mplayer 2002/08/02)
- to complete....
*/
/*****************************************************************************
* Open: check file and initializes AVI structures
*****************************************************************************/
@ -251,6 +260,9 @@ static int Open( vlc_object_t * p_this )
tk->i_idxposc = 0;
tk->i_idxposb = 0;
tk->i_blockno = 0;
tk->i_blocksize = 0;
p_auds = (void*)p_vids = (void*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
if( p_strl == NULL || p_strh == NULL || p_auds == NULL || p_vids == NULL )
@ -271,6 +283,17 @@ static int Open( vlc_object_t * p_this )
tk->i_cat = AUDIO_ES;
tk->i_codec = AVI_FourccGetCodec( AUDIO_ES,
p_auds->p_wf->wFormatTag );
if( ( tk->i_blocksize = p_auds->p_wf->nBlockAlign ) == 0 )
{
if( p_auds->p_wf->wFormatTag == 1 )
{
tk->i_blocksize = p_auds->p_wf->nChannels * (p_auds->p_wf->wBitsPerSample/8);
}
else
{
tk->i_blocksize = 1;
}
}
es_format_Init( &fmt, AUDIO_ES, tk->i_codec );
fmt.audio.i_channels = p_auds->p_wf->nChannels;
@ -727,8 +750,14 @@ static int Demux_Seekable( input_thread_t *p_input )
}
else
{
toread[i_track].i_toread--;
int i_length = tk->p_index[tk->i_idxposc].i_length;
tk->i_idxposc++;
if( tk->i_cat == AUDIO_ES )
{
tk->i_blockno += tk->i_blocksize > 0 ? ( i_length + tk->i_blocksize - 1 ) / tk->i_blocksize : 1;
}
toread[i_track].i_toread--;
}
if( tk->i_idxposc < tk->i_idxnb)
@ -908,6 +937,10 @@ static int Demux_UnSeekable( input_thread_t *p_input )
}
else
{
if( p_stream->i_cat == AUDIO_ES )
{
p_stream->i_blockno += p_stream->i_blocksize > 0 ? ( avi_pk.i_size + p_stream->i_blocksize - 1 ) / p_stream->i_blocksize : 1;
}
p_stream->i_idxposc++;
}
@ -1206,7 +1239,14 @@ static mtime_t AVI_GetPTS( avi_track_t *tk )
}
else
{
return AVI_GetDPTS( tk, tk->i_idxposc );
if( tk->i_cat == AUDIO_ES )
{
return AVI_GetDPTS( tk, tk->i_blockno );
}
else
{
return AVI_GetDPTS( tk, tk->i_idxposc );
}
}
}
@ -1376,6 +1416,8 @@ static int AVI_TrackSeek( input_thread_t *p_input,
mtime_t i_date )
{
demux_sys_t *p_sys = p_input->p_demux_data;
avi_track_t *tk = p_sys->track[i_stream];
#define p_stream p_sys->track[i_stream]
mtime_t i_oldpts;
@ -1390,6 +1432,23 @@ static int AVI_TrackSeek( input_thread_t *p_input,
return VLC_EGENERIC;
}
if( p_stream->i_cat == AUDIO_ES )
{
unsigned int i;
tk->i_blockno = 0;
for( i = 0; i < tk->i_idxposc; i++ )
{
if( tk->i_blocksize > 0 )
{
tk->i_blockno += ( tk->p_index[i].i_length + tk->i_blocksize - 1 ) / tk->i_blocksize;
}
else
{
tk->i_blockno++;
}
}
}
msg_Dbg( p_input,
"old:"I64Fd" %s new "I64Fd,
i_oldpts,

5
modules/demux/avi/avi.h
View File

@ -2,7 +2,7 @@
* avi.h : AVI file Stream input module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
* $Id: avi.h,v 1.17 2003/11/13 11:49:27 fenrir Exp $
* $Id: avi.h,v 1.18 2004/01/04 17:35:02 fenrir Exp $
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify
@ -64,6 +64,9 @@ typedef struct
unsigned int i_idxposc; /* numero of chunk */
unsigned int i_idxposb; /* byte in the current chunk */
/* For VBR audio only */
unsigned int i_blockno;
unsigned int i_blocksize;
} avi_track_t;
struct demux_sys_t