Skip to content

V
vlc-1.1
Commit 651d773d authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont
Browse files
Options

Handle VOC files with multiple blocks properly

parent 2c53152a
Hide whitespace changes
Inline Side-by-side
Showing with 118 additions and 70 deletions
modules/demux/voc.c
View file @ 651d773d
......@@ -2,7 +2,7 @@
* voc.c : Creative Voice File (.VOC) demux module for vlc
*****************************************************************************
* Copyright (C) 2005 VideoLAN
* $Id: xa.c 10182 2005-03-07 15:04:53Z courmisch $
* $Id$
*
* Authors: Remi Denis-Courmont <rem # via.ecp.fr>
*
......@@ -72,7 +72,7 @@ static int Open( vlc_object_t * p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
uint8_t *p_buf, buf[8];
uint8_t *p_buf;
uint16_t i_data_offset, i_version;
if( stream_Peek( p_demux->s, &p_buf, 26 ) < 26 )
......@@ -103,137 +103,187 @@ static int Open( vlc_object_t * p_this )
if( stream_Read( p_demux->s, NULL, i_data_offset ) < i_data_offset )
return VLC_EGENERIC;
/* read first block header */
/* FIXME: we only support one-block files at the moment */
if( stream_Read( p_demux->s, buf, 4 ) < 4 )
return VLC_EGENERIC;
p_demux->pf_demux = Demux;
p_demux->pf_control = Control;
p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
p_sys->i_block_size = GetDWLE( buf ) >> 8;
msg_Dbg( p_demux, "block size: %u bytes", p_sys->i_block_size );
if( p_sys == NULL )
return VLC_ENOMEM;
p_sys->i_block_offset = p_sys->i_block_size = 0;
p_sys->p_es = NULL;
date_Init( &p_sys->pts, 1, 1 );
date_Set( &p_sys->pts, 1 );
return VLC_SUCCESS;
}
static int fmtcmp( es_format_t *ofmt, es_format_t *nfmt )
{
return (ofmt->audio.i_bitspersample != nfmt->audio.i_bitspersample)
|| (ofmt->audio.i_rate != nfmt->audio.i_rate)
|| (ofmt->audio.i_channels != nfmt->audio.i_channels);
}
static int ReadBlockHeader( demux_t *p_demux )
{
es_format_t new_fmt;
uint8_t buf[8];
int32_t i_block_size;
demux_sys_t *p_sys = p_demux->p_sys;
if( stream_Read( p_demux->s, buf, 4 ) < 4 )
return VLC_EGENERIC; /* EOF */
i_block_size = GetDWLE( buf ) >> 8;
msg_Dbg( p_demux, "new block: type: %u, size: %u",
(unsigned)*buf, i_block_size );
es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
es_format_Init( &new_fmt, AUDIO_ES, 0 );
switch( *buf )
{
/*case 0: -- not possible caught earlier with stream_Read */
case 1:
if( p_sys->i_block_size < 2 )
goto error;
p_sys->i_block_size -= 2;
if( i_block_size < 2 )
return VLC_EGENERIC;
i_block_size -= 2;
if( stream_Read( p_demux->s, buf, 2 ) < 2 )
goto error;
return VLC_EGENERIC;
p_sys->fmt.audio.i_rate = 1000000L / (256L - buf[0]);
new_fmt.audio.i_rate = 1000000L / (256L - buf[0]);
if( buf[1] )
{
msg_Err( p_demux, "Unsupported compression" );
goto error;
return VLC_EGENERIC;
}
p_sys->fmt.i_codec = VLC_FOURCC('u','8',' ',' ');
p_sys->fmt.audio.i_bytes_per_frame = 1;
p_sys->fmt.audio.i_frame_length = 1;
p_sys->fmt.audio.i_channels = 1;
p_sys->fmt.audio.i_blockalign = 1;
p_sys->fmt.audio.i_bitspersample = 8;
p_sys->fmt.i_bitrate = p_sys->fmt.audio.i_rate * 8;
new_fmt.i_codec = VLC_FOURCC('u','8',' ',' ');
new_fmt.audio.i_bytes_per_frame = 1;
new_fmt.audio.i_frame_length = 1;
new_fmt.audio.i_channels = 1;
new_fmt.audio.i_blockalign = 1;
new_fmt.audio.i_bitspersample = 8;
new_fmt.i_bitrate = p_sys->fmt.audio.i_rate * 8;
break;
/* FIXME: support block types 2, 3, 6, 7, 8 properly */
case 2:
case 3:
case 6:
case 7:
case 8:
/* non-audio block types can be skipped */
case 4:
case 5:
if( stream_Read( p_demux->s, NULL, i_block_size ) < i_block_size )
return VLC_EGENERIC;
i_block_size = 0;
break;
case 9:
if( p_sys->i_block_size < 12 )
goto error;
p_sys->i_block_size -= 12;
if( i_block_size < 12 )
return VLC_EGENERIC;
i_block_size -= 12;
if( ( stream_Read( p_demux->s, buf, 8 ) < 8 )
|| ( stream_Read( p_demux->s, NULL, 4 ) < 4 ) )
goto error;
return VLC_EGENERIC;
p_sys->fmt.audio.i_rate = GetDWLE( buf );
p_sys->fmt.audio.i_bitspersample = buf[4];
p_sys->fmt.audio.i_channels = buf[5];
new_fmt.audio.i_rate = GetDWLE( buf );
new_fmt.audio.i_bitspersample = buf[4];
new_fmt.audio.i_channels = buf[5];
switch( GetWLE( &buf[6] ) ) /* format */
{
case 0x0000: /* PCM */
switch( p_sys->fmt.audio.i_bitspersample )
switch( new_fmt.audio.i_bitspersample )
{
case 8:
p_sys->fmt.i_codec = VLC_FOURCC('u','8',' ',' ');
new_fmt.i_codec = VLC_FOURCC('u','8',' ',' ');
break;
case 16:
p_sys->fmt.i_codec = VLC_FOURCC('u','1','6','l');
new_fmt.i_codec = VLC_FOURCC('u','1','6','l');
break;
default:
msg_Err( p_demux, "Unsupported bit res.: %u bits",
p_sys->fmt.audio.i_bitspersample );
new_fmt.audio.i_bitspersample );
return VLC_EGENERIC;
}
break;
case 0x0004: /* signed */
switch( p_sys->fmt.audio.i_bitspersample )
switch( new_fmt.audio.i_bitspersample )
{
case 8:
p_sys->fmt.i_codec = VLC_FOURCC('s','8',' ',' ');
new_fmt.i_codec = VLC_FOURCC('s','8',' ',' ');
break;
case 16:
p_sys->fmt.i_codec = VLC_FOURCC('s','1','6','l');
new_fmt.i_codec = VLC_FOURCC('s','1','6','l');
break;
default:
msg_Err( p_demux, "Unsupported bit res.: %u bits",
p_sys->fmt.audio.i_bitspersample );
new_fmt.audio.i_bitspersample );
return VLC_EGENERIC;
}
break;
default:
msg_Err( p_demux, "Unsupported compression" );
goto error;
return VLC_EGENERIC;
}
p_sys->fmt.audio.i_bytes_per_frame = p_sys->fmt.audio.i_channels
* (p_sys->fmt.audio.i_bitspersample / 8);
p_sys->fmt.audio.i_frame_length = 1;
p_sys->fmt.audio.i_blockalign = p_sys->fmt.audio.i_bytes_per_frame;
p_sys->fmt.i_bitrate = 8 * p_sys->fmt.audio.i_rate
* p_sys->fmt.audio.i_bytes_per_frame;
new_fmt.audio.i_bytes_per_frame = new_fmt.audio.i_channels
* (new_fmt.audio.i_bitspersample / 8);
new_fmt.audio.i_frame_length = 1;
new_fmt.audio.i_blockalign = p_sys->fmt.audio.i_bytes_per_frame;
new_fmt.i_bitrate = 8 * new_fmt.audio.i_rate
* new_fmt.audio.i_bytes_per_frame;
break;
default:
msg_Dbg( p_demux, "Unsupported block type %u", (unsigned)*p_buf);
msg_Dbg( p_demux, "Unsupported block type %u", (unsigned)*buf);
return VLC_EGENERIC;
}
p_sys->i_block_offset = stream_Tell( p_demux->s );
p_sys->fmt.i_extra = 0;
p_sys->fmt.p_extra = NULL;
msg_Dbg( p_demux, "fourcc: %4.4s, channels: %d, "
"freq: %d Hz, bitrate: %dKo/s, blockalign: %d, bits/samples: %d",
(char *)&p_sys->fmt.i_codec, p_sys->fmt.audio.i_channels,
p_sys->fmt.audio.i_rate, p_sys->fmt.i_bitrate / 8192,
p_sys->fmt.audio.i_blockalign, p_sys->fmt.audio.i_bitspersample
);
p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
p_sys->i_block_size = i_block_size;
p_sys->i_block_offset = stream_Tell( p_demux->s );
date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
date_Set( &p_sys->pts, 1 );
if( i_block_size )
{
/* we've read a block with data in it - update decoder */
msg_Dbg( p_demux, "fourcc: %4.4s, channels: %d, "
"freq: %d Hz, bitrate: %dKo/s, blockalign: %d, "
"bits/samples: %d", (char *)&new_fmt.i_codec,
new_fmt.audio.i_channels, new_fmt.audio.i_rate,
new_fmt.i_bitrate / 8192, new_fmt.audio.i_blockalign,
new_fmt.audio.i_bitspersample );
if( ( p_sys->p_es != NULL ) && fmtcmp( &p_sys->fmt, &new_fmt ) )
{
msg_Dbg( p_demux, "codec change needed" );
es_out_Del( p_demux->out, p_sys->p_es );
p_sys->p_es = NULL;
}
if( p_sys->p_es == NULL )
{
memcpy( &p_sys->fmt, &new_fmt, sizeof( p_sys->fmt ) );
date_Change( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
}
}
return VLC_SUCCESS;
error:
msg_Err( p_demux, "Unsupported or malformatted file" );
free( p_sys );
return VLC_EGENERIC;
}
/*****************************************************************************
......@@ -249,11 +299,9 @@ static int Demux( demux_t *p_demux )
i_offset = stream_Tell( p_demux->s );
if( i_offset >= p_sys->i_block_offset + p_sys->i_block_size )
{
/* EOF */
return 0;
}
while( i_offset >= p_sys->i_block_offset + p_sys->i_block_size )
if( ReadBlockHeader( p_demux ) != VLC_SUCCESS )
return 0;
p_block = stream_Block( p_demux->s, p_sys->fmt.audio.i_bytes_per_frame );
if( p_block == NULL )
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment