1 /*****************************************************************************
2 * nsv.c: NullSoft Video demuxer.
3 *****************************************************************************
4 * Copyright (C) 2004-2007 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_demux.h>
37 * - implement NSVf parsing (to get meta data)
38 * - implement missing Control (and in the right way)
42 /*****************************************************************************
44 *****************************************************************************/
45 static int Open ( vlc_object_t * );
46 static void Close ( vlc_object_t * );
49 set_description( N_("NullSoft demuxer" ) )
50 set_capability( "demux", 10 )
51 set_category( CAT_INPUT )
52 set_subcategory( SUBCAT_INPUT_DEMUX )
53 set_callbacks( Open, Close )
57 /*****************************************************************************
59 *****************************************************************************/
63 es_format_t fmt_audio;
66 es_format_t fmt_video;
79 static int Demux ( demux_t *p_demux );
80 static int Control( demux_t *p_demux, int i_query, va_list args );
82 static int ReSynch( demux_t *p_demux );
84 static int ReadNSVf( demux_t *p_demux );
85 static int ReadNSVs( demux_t *p_demux );
87 /*****************************************************************************
89 *****************************************************************************/
90 static int Open( vlc_object_t *p_this )
92 demux_t *p_demux = (demux_t*)p_this;
95 const uint8_t *p_peek;
97 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
100 if( memcmp( p_peek, "NSVf", 4 ) && memcmp( p_peek, "NSVs", 4 ) )
102 /* In case we had force this demuxer we try to resynch */
103 if( !p_demux->b_force || ReSynch( p_demux ) )
107 /* Fill p_demux field */
108 p_demux->pf_demux = Demux;
109 p_demux->pf_control = Control;
110 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
112 es_format_Init( &p_sys->fmt_audio, AUDIO_ES, 0 );
113 p_sys->p_audio = NULL;
115 es_format_Init( &p_sys->fmt_video, VIDEO_ES, 0 );
116 p_sys->p_video = NULL;
118 es_format_Init( &p_sys->fmt_sub, SPU_ES, 0 );
123 p_sys->i_pcr_inc = 0;
125 p_sys->b_start_record = false;
130 /*****************************************************************************
132 *****************************************************************************/
133 static void Close( vlc_object_t *p_this )
135 demux_t *p_demux = (demux_t*)p_this;
136 demux_sys_t *p_sys = p_demux->p_sys;
142 /*****************************************************************************
144 *****************************************************************************/
145 static int Demux( demux_t *p_demux )
147 demux_sys_t *p_sys = p_demux->p_sys;
150 const uint8_t *p_peek;
157 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
159 msg_Warn( p_demux, "cannot peek" );
163 if( !memcmp( p_peek, "NSVf", 4 ) )
165 if( ReadNSVf( p_demux ) )
168 else if( !memcmp( p_peek, "NSVs", 4 ) )
170 if( p_sys->b_start_record )
172 /* Enable recording once synchronized */
173 stream_Control( p_demux->s, STREAM_SET_RECORD_STATE, true, "nsv" );
174 p_sys->b_start_record = false;
177 if( ReadNSVs( p_demux ) )
181 else if( GetWLE( p_peek ) == 0xbeef )
183 /* Next frame of the current NSVs chunk */
184 if( stream_Read( p_demux->s, NULL, 2 ) < 2 )
186 msg_Warn( p_demux, "cannot read" );
193 msg_Err( p_demux, "invalid signature 0x%x (%4.4s)", GetDWLE( p_peek ), (const char*)p_peek );
194 if( ReSynch( p_demux ) )
199 if( stream_Read( p_demux->s, header, 5 ) < 5 )
201 msg_Warn( p_demux, "cannot read" );
206 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
209 i_size = ( header[0] >> 4 ) | ( header[1] << 4 ) | ( header[2] << 12 );
213 if( (header[0]&0x0f) != 0x0 )
218 if( stream_Read( p_demux->s, aux, 6 ) < 6 )
220 msg_Warn( p_demux, "cannot read" );
223 i_aux = GetWLE( aux );
224 fcc = VLC_FOURCC( aux[2], aux[3], aux[4], aux[5] );
226 msg_Dbg( p_demux, "Belekas: %d - size=%d fcc=%4.4s",
227 header[0]&0xf, i_aux, (char*)&fcc );
229 if( fcc == VLC_FOURCC( 'S', 'U', 'B', 'T' ) && i_aux > 2 )
231 if( p_sys->p_sub == NULL )
233 p_sys->fmt_sub.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
234 p_sys->p_sub = es_out_Add( p_demux->out, &p_sys->fmt_sub );
235 es_out_Control( p_demux->out, ES_OUT_SET_ES, p_sys->p_sub );
237 stream_Read( p_demux->s, NULL, 2 );
239 if( ( p_frame = stream_Block( p_demux->s, i_aux - 2 ) ) )
241 uint8_t *p = p_frame->p_buffer;
243 while( p < &p_frame->p_buffer[p_frame->i_buffer] && *p != 0 )
247 if( *p == 0 && p + 1 < &p_frame->p_buffer[p_frame->i_buffer] )
249 p_frame->i_buffer -= p + 1 - p_frame->p_buffer;
250 p_frame->p_buffer = p + 1;
253 /* Skip the first part (it is the language name) */
254 p_frame->i_pts = p_sys->i_pcr;
255 p_frame->i_dts = p_sys->i_pcr + 4000000; /* 4s */
257 es_out_Send( p_demux->out, p_sys->p_sub, p_frame );
262 /* We skip this extra data */
263 if( stream_Read( p_demux->s, NULL, i_aux ) < i_aux )
265 msg_Warn( p_demux, "cannot read" );
272 /* msg_Dbg( p_demux, "frame video size=%d", i_size ); */
273 if( i_size > 0 && ( p_frame = stream_Block( p_demux->s, i_size ) ) )
275 p_frame->i_dts = p_sys->i_pcr;
276 es_out_Send( p_demux->out, p_sys->p_video, p_frame );
281 i_size = header[3] | ( header[4] << 8 );
284 /* msg_Dbg( p_demux, "frame audio size=%d", i_size ); */
285 if( p_sys->fmt_audio.i_codec == VLC_FOURCC( 'a', 'r', 'a', 'w' ) )
288 stream_Read( p_demux->s, h, 4 );
290 p_sys->fmt_audio.audio.i_channels = h[1];
291 p_sys->fmt_audio.audio.i_rate = GetWLE( &h[2] );
295 if( p_sys->p_audio == NULL )
297 p_sys->p_audio = es_out_Add( p_demux->out, &p_sys->fmt_audio );
300 if( ( p_frame = stream_Block( p_demux->s, i_size ) ) )
303 p_frame->i_pts = p_sys->i_pcr;
304 es_out_Send( p_demux->out, p_sys->p_audio, p_frame );
308 p_sys->i_pcr += p_sys->i_pcr_inc;
309 if( p_sys->i_time >= 0 )
311 p_sys->i_time += p_sys->i_pcr_inc;
317 /*****************************************************************************
319 *****************************************************************************/
320 static int Control( demux_t *p_demux, int i_query, va_list args )
322 demux_sys_t *p_sys = p_demux->p_sys;
324 bool b_bool, *pb_bool;
329 case DEMUX_GET_POSITION:
330 pf = (double*) va_arg( args, double* );
331 i64 = stream_Size( p_demux->s );
334 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
342 case DEMUX_SET_POSITION:
343 f = (double) va_arg( args, double );
344 i64 = stream_Size( p_demux->s );
346 if( stream_Seek( p_demux->s, (int64_t)(i64 * f) ) || ReSynch( p_demux ) )
349 p_sys->i_time = -1; /* Invalidate time display */
353 pi64 = (int64_t*)va_arg( args, int64_t * );
354 if( p_sys->i_time < 0 )
359 *pi64 = p_sys->i_time;
363 case DEMUX_GET_LENGTH:
364 pi64 = (int64_t*)va_arg( args, int64_t * );
365 if( p_sys->i_mux_rate > 0 )
367 *pi64 = (int64_t)1000000 * ( stream_Size( p_demux->s ) / 50 ) / p_sys->i_mux_rate;
375 pf = (double*)va_arg( args, double * );
376 *pf = (double)1000000.0 / (double)p_sys->i_pcr_inc;
379 case DEMUX_CAN_RECORD:
380 pb_bool = (bool*)va_arg( args, bool * );
384 case DEMUX_SET_RECORD_STATE:
385 b_bool = (bool)va_arg( args, int );
388 stream_Control( p_demux->s, STREAM_SET_RECORD_STATE, false );
389 p_sys->b_start_record = b_bool;
399 /*****************************************************************************
401 *****************************************************************************/
402 static int ReSynch( demux_t *p_demux )
404 const uint8_t *p_peek;
408 while( vlc_object_alive (p_demux) )
410 if( ( i_peek = stream_Peek( p_demux->s, &p_peek, 1024 ) ) < 8 )
416 while( i_skip < i_peek - 4 )
418 if( !memcmp( p_peek, "NSVf", 4 )
419 || !memcmp( p_peek, "NSVs", 4 ) )
423 stream_Read( p_demux->s, NULL, i_skip );
431 stream_Read( p_demux->s, NULL, i_skip );
436 /*****************************************************************************
438 *****************************************************************************/
439 static int ReadNSVf( demux_t *p_demux )
441 /* demux_sys_t *p_sys = p_demux->p_sys; */
445 msg_Dbg( p_demux, "new NSVf chunk" );
446 if( stream_Peek( p_demux->s, &p, 8 ) < 8 )
451 i_size = GetDWLE( &p[4] );
452 msg_Dbg( p_demux, " - size=%d", i_size );
454 return stream_Read( p_demux->s, NULL, i_size ) == i_size ? VLC_SUCCESS : VLC_EGENERIC;
456 /*****************************************************************************
458 *****************************************************************************/
459 static int ReadNSVs( demux_t *p_demux )
461 demux_sys_t *p_sys = p_demux->p_sys;
465 if( stream_Read( p_demux->s, header, 19 ) < 19 )
467 msg_Warn( p_demux, "cannot read" );
472 switch( ( fcc = VLC_FOURCC( header[4], header[5], header[6], header[7] ) ) )
474 case VLC_FOURCC( 'V', 'P', '3', ' ' ):
475 case VLC_FOURCC( 'V', 'P', '3', '0' ):
476 case VLC_FOURCC( 'V', 'P', '3', '1' ):
477 fcc = VLC_FOURCC( 'V', 'P', '3', '0' );
479 case VLC_FOURCC( 'V', 'P', '5', ' ' ):
480 case VLC_FOURCC( 'V', 'P', '5', '0' ):
481 fcc = VLC_FOURCC( 'V', 'P', '5', '0' );
483 case VLC_FOURCC( 'V', 'P', '6', '0' ):
484 case VLC_FOURCC( 'V', 'P', '6', '1' ):
485 case VLC_FOURCC( 'V', 'P', '6', '2' ):
486 case VLC_FOURCC( 'H', '2', '6', '4' ):
487 case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
490 msg_Warn( p_demux, "unknown codec %4.4s", (char *)&fcc );
493 if( fcc != VLC_FOURCC( 'N', 'O', 'N', 'E' ) && fcc != p_sys->fmt_video.i_codec )
495 es_format_Init( &p_sys->fmt_video, VIDEO_ES, fcc );
496 p_sys->fmt_video.video.i_width = GetWLE( &header[12] );
497 p_sys->fmt_video.video.i_height = GetWLE( &header[14] );
500 es_out_Del( p_demux->out, p_sys->p_video );
502 p_sys->p_video = es_out_Add( p_demux->out, &p_sys->fmt_video );
504 msg_Dbg( p_demux, " - video `%4.4s' %dx%d",
506 p_sys->fmt_video.video.i_width,
507 p_sys->fmt_video.video.i_height );
511 switch( ( fcc = VLC_FOURCC( header[8], header[9], header[10], header[11] ) ) )
513 case VLC_FOURCC( 'M', 'P', '3', ' ' ):
514 fcc = VLC_FOURCC( 'm', 'p', 'g', 'a' );
516 case VLC_FOURCC( 'P', 'C', 'M', ' ' ):
517 fcc = VLC_FOURCC( 'a', 'r', 'a', 'w' );
519 case VLC_FOURCC( 'A', 'A', 'C', ' ' ):
520 case VLC_FOURCC( 'A', 'A', 'C', 'P' ):
521 fcc = VLC_FOURCC( 'm', 'p', '4', 'a' );
523 case VLC_FOURCC( 'S', 'P', 'X', ' ' ):
524 fcc = VLC_FOURCC( 's', 'p', 'x', ' ' );
526 case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
529 msg_Warn( p_demux, "unknown codec %4.4s", (char *)&fcc );
533 if( fcc != VLC_FOURCC( 'N', 'O', 'N', 'E' ) && fcc != p_sys->fmt_audio.i_codec )
535 msg_Dbg( p_demux, " - audio `%4.4s'", (char*)&fcc );
539 es_out_Del( p_demux->out, p_sys->p_audio );
540 p_sys->p_audio = NULL;
542 es_format_Init( &p_sys->fmt_audio, AUDIO_ES, fcc );
545 if( header[16]&0x80 )
547 /* Fractional frame rate */
548 switch( header[16]&0x03 )
551 p_sys->i_pcr_inc = 33333; /* 300000/9 */
553 case 1: /* 29.97 fps */
554 p_sys->i_pcr_inc = 33367; /* 300300/9 */
557 p_sys->i_pcr_inc = 40000; /* 360000/9 */
559 case 3: /* 23.98 fps */
560 p_sys->i_pcr_inc = 41700; /* 375300/9 */
564 if( header[16] < 0xc0 )
565 p_sys->i_pcr_inc = p_sys->i_pcr_inc * (((header[16] ^ 0x80) >> 2 ) +1 );
567 p_sys->i_pcr_inc = p_sys->i_pcr_inc / (((header[16] ^ 0xc0) >> 2 ) +1 );
569 else if( header[16] != 0 )
571 /* Integer frame rate */
572 p_sys->i_pcr_inc = 1000000 / header[16];
576 msg_Dbg( p_demux, "invalid fps (0x00)" );
577 p_sys->i_pcr_inc = 40000;
579 //msg_Dbg( p_demux, " - fps=%.3f", 1000000.0 / (double)p_sys->i_pcr_inc );