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real.c
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/*****************************************************************************
* real.c: Real demuxer.
*****************************************************************************
* Copyright (C) 2004, 2006-2007 the VideoLAN team
* $Id$
*
* Authors: Laurent Aimar <[email protected]>
*
* 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
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/**
* Status of this demuxer:
* Real Media format
* -----------------
*
* version v3 w/ 14_4/lpcJ is ok.
* version v4/5: - atrac3 is ok.
* - cook is ok.
* - raac, racp are ok.
* - dnet is twisted "The byte order of the data is reversed
* from standard AC3" but ok
* - 28_8 is ok.
* - sipr is ok.
* - ralf is unsupported, but hardly any sample exist.
* - mp3 is unsupported, one sample exists...
*
* Real Audio Only
* ---------------
* v3 and v4/5 headers are parsed.
* Doesn't work yet...
*/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#define VLC_MODULE_LICENSE VLC_LICENSE_GPL_2_PLUS
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_demux.h>
#include <vlc_charset.h>
#include <vlc_meta.h>
#include <assert.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
vlc_module_begin ()
set_description( N_("Real demuxer" ) )
set_capability( "demux", 0 )
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_DEMUX )
set_callbacks( Open, Close )
add_shortcut( "real", "rm" )
vlc_module_end ()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
typedef struct
{
int i_id;
es_format_t fmt;
es_out_id_t *p_es;
unsigned i_frame_size;
int i_frame_num;
unsigned i_frame_pos;
int i_frame_slice;
int i_frame_slice_count;
block_t *p_frame;
int i_subpacket_h;
int i_subpacket_size;
int i_coded_frame_size;
int i_subpacket;
int i_subpackets;
block_t **p_subpackets;
mtime_t *p_subpackets_timecode;
int i_out_subpacket;
block_t *p_sipr_packet;
int i_sipr_subpacket_count;
mtime_t i_last_dts;
} real_track_t;
typedef struct
{
uint32_t i_file_offset;
uint32_t i_time_offset;
uint32_t i_frame_index;
} real_index_t;
struct demux_sys_t
{
int64_t i_data_offset;
int64_t i_data_size;
uint32_t i_data_packets_count;
uint32_t i_data_packets;
int64_t i_data_offset_next;
bool b_real_audio;
int64_t i_our_duration;
char* psz_title;
char* psz_artist;
char* psz_copyright;
char* psz_description;
int i_track;
real_track_t **track;
size_t i_buffer;
uint8_t buffer[65536];
int64_t i_pcr;
int64_t i_index_offset;
bool b_seek;
real_index_t *p_index;
};
static const unsigned char i_subpacket_size_sipr[4] = { 29, 19, 37, 20 };
static int Demux( demux_t * );
static int Control( demux_t *, int i_query, va_list args );
static void DemuxVideo( demux_t *, real_track_t *tk, mtime_t i_dts, unsigned i_flags );
static void DemuxAudio( demux_t *, real_track_t *tk, mtime_t i_pts, unsigned i_flags );
static int ControlSeekByte( demux_t *, int64_t i_bytes );
static int ControlSeekTime( demux_t *, mtime_t i_time );
static int HeaderRead( demux_t *p_demux );
static int CodecParse( demux_t *p_demux, int i_len, int i_num );
static void RVoid( const uint8_t **pp_data, int *pi_data, int i_size );
static int RLength( const uint8_t **pp_data, int *pi_data );
static uint8_t R8( const uint8_t **pp_data, int *pi_data );
static uint16_t R16( const uint8_t **pp_data, int *pi_data );
static uint32_t R32( const uint8_t **pp_data, int *pi_data );
static void SiprPacketReorder(uint8_t *buf, int sub_packet_h, int framesize);
/*****************************************************************************
* Open
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
const uint8_t *p_peek;
bool b_real_audio = false;
if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 )
return VLC_EGENERIC;
/* Real Audio */
if( !memcmp( p_peek, ".ra", 3 ) )
{
msg_Err( p_demux, ".ra files unsuported" );
b_real_audio = true;
}
/* Real Media Format */
else if( memcmp( p_peek, ".RMF", 4 ) )
{
return VLC_EGENERIC;
}
/* Fill p_demux field */
p_demux->pf_demux = Demux;
p_demux->pf_control = Control;
p_demux->p_sys = p_sys = calloc( 1, sizeof( *p_sys ) );
if( !p_sys )
return VLC_ENOMEM;
p_sys->i_data_offset = 0;
p_sys->i_track = 0;
p_sys->track = NULL;
p_sys->i_pcr = VLC_TS_INVALID;
p_sys->b_seek = false;
p_sys->b_real_audio = b_real_audio;
/* Parse the headers */
/* Real Audio files */
if( b_real_audio )
{
CodecParse( p_demux, 32, 0 ); /* At least 32 */
return VLC_EGENERIC; /* We don't know how to read
correctly the data yet */
}
/* RMF files */
else if( HeaderRead( p_demux ) )
{
msg_Err( p_demux, "invalid header" );
Close( p_this );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Close
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
for( int i = 0; i < p_sys->i_track; i++ )
{
real_track_t *tk = p_sys->track[i];
es_format_Clean( &tk->fmt );
if( tk->p_frame )
block_Release( tk->p_frame );
for( int j = 0; j < tk->i_subpackets; j++ )
{
if( tk->p_subpackets[ j ] )
block_Release( tk->p_subpackets[ j ] );
}
free( tk->p_subpackets );
free( tk->p_subpackets_timecode );
if( tk->p_sipr_packet )
block_Release( tk->p_sipr_packet );
free( tk );
}
if( p_sys->i_track > 0 )
free( p_sys->track );
free( p_sys->psz_title );
free( p_sys->psz_artist );
free( p_sys->psz_copyright );
free( p_sys->psz_description );
free( p_sys->p_index );
free( p_sys );
}
/*****************************************************************************
* Demux:
*****************************************************************************/
static int Demux( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
uint8_t header[18];
if( p_sys->i_data_packets >= p_sys->i_data_packets_count &&
p_sys->i_data_packets_count )
{
if( stream_Read( p_demux->s, header, 18 ) < 18 )
return 0;
if( memcmp( header, "DATA", 4 ) )
return 0;
p_sys->i_data_offset = stream_Tell( p_demux->s ) - 18;
p_sys->i_data_size = GetDWBE( &header[4] );
p_sys->i_data_packets_count = GetDWBE( &header[10] );
p_sys->i_data_packets = 0;
p_sys->i_data_offset_next = GetDWBE( &header[14] );
msg_Dbg( p_demux, "entering new DATA packets=%d next=%u",
p_sys->i_data_packets_count,
(unsigned int)p_sys->i_data_offset_next );
}
/* Read Packet Header */
if( stream_Read( p_demux->s, header, 12 ) < 12 )
return 0;
//const int i_version = GetWBE( &header[0] );
const size_t i_size = GetWBE( &header[2] ) - 12;
const int i_id = GetWBE( &header[4] );
const int64_t i_pts = VLC_TS_0 + 1000 * GetDWBE( &header[6] );
const int i_flags= header[11]; /* flags 0x02 -> keyframe */
p_sys->i_data_packets++;
if( i_size > sizeof(p_sys->buffer) )
{
msg_Err( p_demux, "Got a NUKK size to read. (Invalid format?)" );
return 1;
}
p_sys->i_buffer = stream_Read( p_demux->s, p_sys->buffer, i_size );
if( p_sys->i_buffer < i_size )
return 0;
real_track_t *tk = NULL;
for( int i = 0; i < p_sys->i_track; i++ )
{
if( p_sys->track[i]->i_id == i_id )
tk = p_sys->track[i];
}
if( !tk )
{
msg_Warn( p_demux, "unknown track id(0x%x)", i_id );
return 1;
}
if( tk->fmt.i_cat == VIDEO_ES )
{
DemuxVideo( p_demux, tk, i_pts, i_flags );
}
else
{
assert( tk->fmt.i_cat == AUDIO_ES );
DemuxAudio( p_demux, tk, i_pts, i_flags );
}
/* Update PCR */
mtime_t i_pcr = VLC_TS_INVALID;
for( int i = 0; i < p_sys->i_track; i++ )
{
real_track_t *tk = p_sys->track[i];
if( i_pcr <= VLC_TS_INVALID || ( tk->i_last_dts > VLC_TS_INVALID && tk->i_last_dts < i_pcr ) )
i_pcr = tk->i_last_dts;
}
if( i_pcr > VLC_TS_INVALID && i_pcr != p_sys->i_pcr )
{
p_sys->i_pcr = i_pcr;
es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
}
return 1;
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( demux_t *p_demux, int i_query, va_list args )
{
demux_sys_t *p_sys = p_demux->p_sys;
double f, *pf;
int64_t i64;
int64_t *pi64;
switch( i_query )
{
case DEMUX_GET_POSITION:
pf = (double*) va_arg( args, double* );
/* read stream size maybe failed in rtsp streaming,
so use duration to determin the position at first */
if( p_sys->i_our_duration > 0 )
{
if( p_sys->i_pcr > VLC_TS_INVALID )
*pf = (double)p_sys->i_pcr / 1000.0 / p_sys->i_our_duration;
else
*pf = 0.0;
return VLC_SUCCESS;
}
i64 = stream_Size( p_demux->s );
if( i64 > 0 )
*pf = (double)1.0*stream_Tell( p_demux->s ) / (double)i64;
else
*pf = 0.0;
return VLC_SUCCESS;
case DEMUX_GET_TIME:
pi64 = (int64_t*)va_arg( args, int64_t * );
if( p_sys->i_our_duration > 0 )
{
*pi64 = p_sys->i_pcr > VLC_TS_INVALID ? p_sys->i_pcr : 0;
return VLC_SUCCESS;
}
/* same as GET_POSTION */
i64 = stream_Size( p_demux->s );
if( p_sys->i_our_duration > 0 && i64 > 0 )
{
*pi64 = (int64_t)( 1000.0 * p_sys->i_our_duration * stream_Tell( p_demux->s ) / i64 );
return VLC_SUCCESS;
}
*pi64 = 0;
return VLC_EGENERIC;
case DEMUX_SET_POSITION:
f = (double) va_arg( args, double );
i64 = (int64_t) ( stream_Size( p_demux->s ) * f );
if( !p_sys->p_index && i64 != 0 )
{
/* TODO seek */
msg_Err( p_demux,"Seek No Index Real File failed!" );
return VLC_EGENERIC; // no index!
}
else if( i64 == 0 )
{
/* it is a rtsp stream , it is specials in access/rtsp/... */
msg_Dbg(p_demux, "Seek in real rtsp stream!");
p_sys->i_pcr = VLC_TS_0 + INT64_C(1000) * ( p_sys->i_our_duration * f );
p_sys->b_seek = true;
return stream_Seek( p_demux->s, p_sys->i_pcr - VLC_TS_0 );
}
return ControlSeekByte( p_demux, i64 );
case DEMUX_SET_TIME:
if( !p_sys->p_index )
return VLC_EGENERIC;
i64 = (int64_t) va_arg( args, int64_t );
return ControlSeekTime( p_demux, i64 );
case DEMUX_GET_LENGTH:
pi64 = (int64_t*)va_arg( args, int64_t * );
if( p_sys->i_our_duration <= 0 )
{
*pi64 = 0;
return VLC_EGENERIC;
}
/* our stored duration is in ms, so... */
*pi64 = INT64_C(1000) * p_sys->i_our_duration;
return VLC_SUCCESS;
case DEMUX_GET_META:
{
vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
/* the core will crash if we provide NULL strings, so check
* every string first */
if( p_sys->psz_title )
vlc_meta_SetTitle( p_meta, p_sys->psz_title );
if( p_sys->psz_artist )
vlc_meta_SetArtist( p_meta, p_sys->psz_artist );
if( p_sys->psz_copyright )
vlc_meta_SetCopyright( p_meta, p_sys->psz_copyright );
if( p_sys->psz_description )
vlc_meta_SetDescription( p_meta, p_sys->psz_description );
return VLC_SUCCESS;
}
case DEMUX_GET_FPS:
default:
return VLC_EGENERIC;
}
return VLC_EGENERIC;
}
/*****************************************************************************
* Helpers: demux
*****************************************************************************/
static void CheckPcr( demux_t *p_demux, real_track_t *tk, mtime_t i_dts )
{
demux_sys_t *p_sys = p_demux->p_sys;
if( i_dts > VLC_TS_INVALID )
tk->i_last_dts = i_dts;
if( p_sys->i_pcr > VLC_TS_INVALID || i_dts <= VLC_TS_INVALID )
return;
p_sys->i_pcr = i_dts;
es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
}
static void DemuxVideo( demux_t *p_demux, real_track_t *tk, mtime_t i_dts, unsigned i_flags )
{
demux_sys_t *p_sys = p_demux->p_sys;
const uint8_t *p_data = p_sys->buffer;
int i_data = p_sys->i_buffer;
while( i_data > 1 )
{
uint8_t i_hdr = R8( &p_data, &i_data );
uint8_t i_type = i_hdr >> 6;
uint8_t i_seq;
int i_len;
int i_pos;
int i_frame_num;
if( i_type == 1 )
{
R8( &p_data, &i_data );
i_len = i_data;
i_pos = 0;
i_frame_num = -1;
i_seq = 1;
i_hdr &= ~0x3f;
}
else if( i_type == 3 )
{
i_len = RLength( &p_data, &i_data );
i_pos = RLength( &p_data, &i_data );
i_frame_num = R8( &p_data, &i_data );
i_seq = 1;
i_hdr &= ~0x3f;
}
else
{
assert( i_type == 0 || i_type == 2 );
i_seq = R8( &p_data, &i_data );
i_len = RLength( &p_data, &i_data );
i_pos = RLength( &p_data, &i_data );
i_frame_num = R8( &p_data, &i_data );
}
if( (i_seq & 0x7f) == 1 || tk->i_frame_num != i_frame_num )
{
tk->i_frame_slice = 0;
tk->i_frame_slice_count = 2 * (i_hdr & 0x3f) + 1;
tk->i_frame_pos = 2*4 * tk->i_frame_slice_count + 1;
tk->i_frame_size = i_len + 2*4 * tk->i_frame_slice_count + 1;
tk->i_frame_num = i_frame_num;
if( tk->p_frame )
block_Release( tk->p_frame );
tk->p_frame = block_Alloc( tk->i_frame_size );
if( !tk->p_frame )
{
tk->i_frame_size = 0;
return;
}
tk->p_frame->i_dts = i_dts;
tk->p_frame->i_pts = VLC_TS_INVALID;
if( i_flags & 0x02 )
tk->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
i_dts = VLC_TS_INVALID;
}
int i_frame_data;
if( i_type == 3 )
{
i_frame_data = i_len;
}
else
{
i_frame_data = i_data;
if( i_type == 2 && i_frame_data > i_pos )
i_frame_data = i_pos;
}
if( i_frame_data > i_data )
break;
/* */
tk->i_frame_slice++;
if( tk->i_frame_slice > tk->i_frame_slice_count || !tk->p_frame )
break;
/* */
SetDWLE( &tk->p_frame->p_buffer[2*4*(tk->i_frame_slice-1) + 1 + 0], 1 );
SetDWLE( &tk->p_frame->p_buffer[2*4*(tk->i_frame_slice-1) + 1 + 4], tk->i_frame_pos - (2*4 * tk->i_frame_slice_count + 1) );
if( tk->i_frame_pos + i_frame_data > tk->i_frame_size )
break;
memcpy( &tk->p_frame->p_buffer[tk->i_frame_pos], p_data, i_frame_data );
RVoid( &p_data, &i_data, i_frame_data );
tk->i_frame_pos += i_frame_data;
if( i_type != 0 || tk->i_frame_pos >= tk->i_frame_size )
{
/* Fix the buffer once the real number of slice is known */
tk->p_frame->p_buffer[0] = tk->i_frame_slice - 1;
tk->p_frame->i_buffer = tk->i_frame_pos - 2*4*( tk->i_frame_slice_count - tk->i_frame_slice );
memmove( &tk->p_frame->p_buffer[1+2*4*tk->i_frame_slice ],
&tk->p_frame->p_buffer[1+2*4*tk->i_frame_slice_count],
tk->i_frame_pos - (2*4*tk->i_frame_slice_count + 1) );
/* Send it */
CheckPcr( p_demux, tk, tk->p_frame->i_dts );
es_out_Send( p_demux->out, tk->p_es, tk->p_frame );
tk->i_frame_size = 0;
tk->p_frame = NULL;
}
}
}
static void DemuxAudioMethod1( demux_t *p_demux, real_track_t *tk, mtime_t i_pts, unsigned int i_flags )
{
demux_sys_t *p_sys = p_demux->p_sys;
uint8_t *p_buf = p_sys->buffer;
/* Sanity check */
if( (i_flags & 2) || p_sys->b_seek )
{
tk->i_subpacket = 0;
tk->i_out_subpacket = 0;
p_sys->b_seek = false;
}
if( tk->fmt.i_codec == VLC_CODEC_COOK ||
tk->fmt.i_codec == VLC_CODEC_ATRAC3 )
{
const int i_num = tk->i_frame_size / tk->i_subpacket_size;
const int y = tk->i_subpacket / ( tk->i_frame_size / tk->i_subpacket_size );
for( int i = 0; i < i_num; i++ )
{
int i_index = tk->i_subpacket_h * i +
((tk->i_subpacket_h + 1) / 2) * (y&1) + (y>>1);
if( i_index >= tk->i_subpackets )
return;
block_t *p_block = block_Alloc( tk->i_subpacket_size );
if( !p_block )
return;
if( &p_buf[tk->i_subpacket_size] > &p_sys->buffer[p_sys->i_buffer] )
return;
memcpy( p_block->p_buffer, p_buf, tk->i_subpacket_size );
p_block->i_dts =
p_block->i_pts = VLC_TS_INVALID;
p_buf += tk->i_subpacket_size;
if( tk->p_subpackets[i_index] != NULL )
{
msg_Dbg(p_demux, "p_subpackets[ %d ] not null!", i_index );
block_Release( tk->p_subpackets[i_index] );
}
tk->p_subpackets[i_index] = p_block;
if( tk->i_subpacket == 0 )
tk->p_subpackets_timecode[0] = i_pts;
tk->i_subpacket++;
}
}
else
{
const int y = tk->i_subpacket / (tk->i_subpacket_h / 2);
assert( tk->fmt.i_codec == VLC_CODEC_RA_288 );
for( int i = 0; i < tk->i_subpacket_h / 2; i++ )
{
int i_index = (i * 2 * tk->i_frame_size / tk->i_coded_frame_size) + y;
if( i_index >= tk->i_subpackets )
return;
block_t *p_block = block_Alloc( tk->i_coded_frame_size);
if( !p_block )
return;
if( &p_buf[tk->i_coded_frame_size] > &p_sys->buffer[p_sys->i_buffer] )
return;
memcpy( p_block->p_buffer, p_buf, tk->i_coded_frame_size );
p_block->i_dts =
p_block->i_pts = i_index == 0 ? i_pts : VLC_TS_INVALID;
p_buf += tk->i_coded_frame_size;
if( tk->p_subpackets[i_index] != NULL )
{
msg_Dbg(p_demux, "p_subpackets[ %d ] not null!", i_index );
block_Release( tk->p_subpackets[i_index] );
}
tk->p_subpackets[i_index] = p_block;
tk->i_subpacket++;
}
}
while( tk->i_out_subpacket != tk->i_subpackets &&
tk->p_subpackets[tk->i_out_subpacket] )
{
block_t *p_block = tk->p_subpackets[tk->i_out_subpacket];
tk->p_subpackets[tk->i_out_subpacket] = NULL;
if( tk->p_subpackets_timecode[tk->i_out_subpacket] )
{
p_block->i_dts =
p_block->i_pts = tk->p_subpackets_timecode[tk->i_out_subpacket];
tk->p_subpackets_timecode[tk->i_out_subpacket] = 0;
}
tk->i_out_subpacket++;
CheckPcr( p_demux, tk, p_block->i_pts );
es_out_Send( p_demux->out, tk->p_es, p_block );
}
if( tk->i_subpacket == tk->i_subpackets &&
tk->i_out_subpacket != tk->i_subpackets )
{
msg_Warn( p_demux, "i_subpacket != i_out_subpacket, "
"this shouldn't happen" );
}
if( tk->i_subpacket == tk->i_subpackets )
{
tk->i_subpacket = 0;
tk->i_out_subpacket = 0;
}
}
static void DemuxAudioMethod2( demux_t *p_demux, real_track_t *tk, mtime_t i_pts )
{
demux_sys_t *p_sys = p_demux->p_sys;
if( p_sys->i_buffer < 2 )
return;
unsigned i_sub = (p_sys->buffer[1] >> 4)&0x0f;
if( p_sys->i_buffer < 2+2*i_sub )
return;
uint8_t *p_sub = &p_sys->buffer[2+2*i_sub];
for( unsigned i = 0; i < i_sub; i++ )
{
const int i_sub_size = GetWBE( &p_sys->buffer[2+i*2] );
block_t *p_block = block_Alloc( i_sub_size );
if( !p_block )
break;
if( &p_sub[i_sub_size] > &p_sys->buffer[p_sys->i_buffer] )
break;
memcpy( p_block->p_buffer, p_sub, i_sub_size );
p_sub += i_sub_size;
p_block->i_dts =
p_block->i_pts = i == 0 ? i_pts : VLC_TS_INVALID;
CheckPcr( p_demux, tk, p_block->i_pts );
es_out_Send( p_demux->out, tk->p_es, p_block );
}
}
static void DemuxAudioMethod3( demux_t *p_demux, real_track_t *tk, mtime_t i_pts )
{
demux_sys_t *p_sys = p_demux->p_sys;
if( p_sys->i_buffer <= 0 )
return;
block_t *p_block = block_Alloc( p_sys->i_buffer );
if( !p_block )
return;
if( tk->fmt.i_codec == VLC_CODEC_A52 )
{
uint8_t *p_src = p_sys->buffer;
uint8_t *p_dst = p_block->p_buffer;
/* byte swap data */
while( p_dst < &p_block->p_buffer[p_sys->i_buffer - 1])
{
*p_dst++ = p_src[1];
*p_dst++ = p_src[0];
p_src += 2;
}
}
else
{
memcpy( p_block->p_buffer, p_sys->buffer, p_sys->i_buffer );
}
p_block->i_dts =
p_block->i_pts = i_pts;
CheckPcr( p_demux, tk, p_block->i_pts );
es_out_Send( p_demux->out, tk->p_es, p_block );
}
// Sipr packet re-ordering code and index table borrowed from
// the MPlayer Realmedia demuxer.
static const uint8_t sipr_swap_index_table[38][2] = {
{ 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 },
{ 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 },
{ 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 },
{ 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 },
{ 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 },
{ 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 },
{ 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 },
{ 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 },
{ 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 },
{ 67, 83 }, { 77, 80 }
};
static void SiprPacketReorder(uint8_t *buf, int sub_packet_h, int framesize)
{
int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket
for (n = 0; n < 38; n++) {
int j;
int i = bs * sipr_swap_index_table[n][0];
int o = bs * sipr_swap_index_table[n][1];
/* swap 4 bit-nibbles of block 'i' with 'o' */
for (j = 0; j < bs; j++, i++, o++) {
int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF,
y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF;
buf[o >> 1] = (x << (4 * (o & 1))) |
(buf[o >> 1] & (0xF << (4 * !(o & 1))));
buf[i >> 1] = (y << (4 * (i & 1))) |
(buf[i >> 1] & (0xF << (4 * !(i & 1))));
}
}
}
static void DemuxAudioSipr( demux_t *p_demux, real_track_t *tk, mtime_t i_pts )
{
demux_sys_t *p_sys = p_demux->p_sys;
block_t *p_block = tk->p_sipr_packet;
if( p_sys->i_buffer < tk->i_frame_size
|| tk->i_sipr_subpacket_count >= tk->i_subpacket_h )
return;
if( !p_block )
{
p_block = block_Alloc( tk->i_frame_size * tk->i_subpacket_h );
if( !p_block )
return;
tk->p_sipr_packet = p_block;
}
memcpy( p_block->p_buffer + tk->i_sipr_subpacket_count * tk->i_frame_size,
p_sys->buffer, tk->i_frame_size );
if (!tk->i_sipr_subpacket_count)
{
p_block->i_dts =
p_block->i_pts = i_pts;
}
if( ++tk->i_sipr_subpacket_count < tk->i_subpacket_h )
return;
SiprPacketReorder(p_block->p_buffer, tk->i_subpacket_h, tk->i_frame_size);
CheckPcr( p_demux, tk, p_block->i_pts );
es_out_Send( p_demux->out, tk->p_es, p_block );
tk->i_sipr_subpacket_count = 0;
tk->p_sipr_packet = NULL;
}
static void DemuxAudio( demux_t *p_demux, real_track_t *tk, mtime_t i_pts, unsigned i_flags )
{
switch( tk->fmt.i_codec )
{
case VLC_CODEC_COOK:
case VLC_CODEC_ATRAC3:
case VLC_CODEC_RA_288:
DemuxAudioMethod1( p_demux, tk, i_pts, i_flags );
break;
case VLC_CODEC_MP4A:
DemuxAudioMethod2( p_demux, tk, i_pts );
break;
case VLC_CODEC_SIPR:
DemuxAudioSipr( p_demux, tk, i_pts );
break;
default:
DemuxAudioMethod3( p_demux, tk, i_pts );
break;
}
}
/*****************************************************************************
* Helpers: seek/control
*****************************************************************************/
static int ControlGoToIndex( demux_t *p_demux, real_index_t *p_index )
{
demux_sys_t *p_sys = p_demux->p_sys;
p_sys->b_seek = true;
p_sys->i_pcr = INT64_C(1000) * p_index->i_time_offset;
for( int i = 0; i < p_sys->i_track; i++ )
p_sys->track[i]->i_last_dts = 0;
return stream_Seek( p_demux->s, p_index->i_file_offset );
}
static int ControlSeekTime( demux_t *p_demux, mtime_t i_time )
{
demux_sys_t *p_sys = p_demux->p_sys;
real_index_t *p_index = p_sys->p_index;
while( p_index->i_file_offset != 0 )
{
if( p_index->i_time_offset * INT64_C(1000) > i_time )
{
if( p_index != p_sys->p_index )
p_index--;
break;
}
p_index++;
}
if( p_index->i_file_offset == 0 )
return VLC_EGENERIC;
return ControlGoToIndex( p_demux, p_index );
}
static int ControlSeekByte( demux_t *p_demux, int64_t i_bytes )
{
demux_sys_t *p_sys = p_demux->p_sys;
real_index_t *p_index = p_sys->p_index;
while( p_index->i_file_offset != 0 )
{
if( p_index->i_file_offset > i_bytes )
{
if( p_index != p_sys->p_index )
p_index--;
break;
}
p_index++;
}
if( p_index->i_file_offset == 0 )
return VLC_EGENERIC;
return ControlGoToIndex( p_demux, p_index );
}
/*****************************************************************************
* Helpers: header reading
*****************************************************************************/
/**
* This function will read a pascal string with size stored in 2 bytes from
* a stream_t.
*
* FIXME what is the right charset ?
*/
static char *StreamReadString2( stream_t *s )
{
uint8_t p_tmp[2];
if( stream_Read( s, p_tmp, 2 ) < 2 )
return NULL;
const int i_length = GetWBE( p_tmp );
if( i_length <= 0 )
return NULL;
char *psz_string = xcalloc( 1, i_length + 1 );
stream_Read( s, psz_string, i_length ); /* Valid even if !psz_string */
if( psz_string )
EnsureUTF8( psz_string );
return psz_string;
}
/**
* This function will read a pascal string with size stored in 1 byte from a
* memory buffer.
*
* FIXME what is the right charset ?
*/
static char *MemoryReadString1( const uint8_t **pp_data, int *pi_data )
{
const uint8_t *p_data = *pp_data;
int i_data = *pi_data;
char *psz_string = NULL;
if( i_data < 1 )
goto exit;
int i_length = *p_data++; i_data--;
if( i_length > i_data )
i_length = i_data;
if( i_length > 0 )
{
psz_string = strndup( (const char*)p_data, i_length );
if( psz_string )
EnsureUTF8( psz_string );