1 /*****************************************************************************
2 * nsv.c: NullSoft Video demuxer.
3 *****************************************************************************
4 * Copyright (C) 2004-2007 VLC authors and VideoLAN
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * 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 p_sys = malloc( sizeof( demux_sys_t ) );
108 if( unlikely(p_sys == NULL) )
111 /* Fill p_demux field */
112 p_demux->p_sys = p_sys;
113 p_demux->pf_demux = Demux;
114 p_demux->pf_control = Control;
116 es_format_Init( &p_sys->fmt_audio, AUDIO_ES, 0 );
117 p_sys->p_audio = NULL;
119 es_format_Init( &p_sys->fmt_video, VIDEO_ES, 0 );
120 p_sys->p_video = NULL;
122 es_format_Init( &p_sys->fmt_sub, SPU_ES, 0 );
127 p_sys->i_pcr_inc = 0;
129 p_sys->b_start_record = false;
134 /*****************************************************************************
136 *****************************************************************************/
137 static void Close( vlc_object_t *p_this )
139 demux_t *p_demux = (demux_t*)p_this;
140 demux_sys_t *p_sys = p_demux->p_sys;
146 /*****************************************************************************
148 *****************************************************************************/
149 static int Demux( demux_t *p_demux )
151 demux_sys_t *p_sys = p_demux->p_sys;
154 const uint8_t *p_peek;
161 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
163 msg_Warn( p_demux, "cannot peek" );
167 if( !memcmp( p_peek, "NSVf", 4 ) )
169 if( ReadNSVf( p_demux ) )
172 else if( !memcmp( p_peek, "NSVs", 4 ) )
174 if( p_sys->b_start_record )
176 /* Enable recording once synchronized */
177 stream_Control( p_demux->s, STREAM_SET_RECORD_STATE, true, "nsv" );
178 p_sys->b_start_record = false;
181 if( ReadNSVs( p_demux ) )
185 else if( GetWLE( p_peek ) == 0xbeef )
187 /* Next frame of the current NSVs chunk */
188 if( stream_Read( p_demux->s, NULL, 2 ) < 2 )
190 msg_Warn( p_demux, "cannot read" );
197 msg_Err( p_demux, "invalid signature 0x%x (%4.4s)", GetDWLE( p_peek ), (const char*)p_peek );
198 if( ReSynch( p_demux ) )
203 if( stream_Read( p_demux->s, header, 5 ) < 5 )
205 msg_Warn( p_demux, "cannot read" );
210 es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + p_sys->i_pcr );
213 i_size = ( header[0] >> 4 ) | ( header[1] << 4 ) | ( header[2] << 12 );
217 if( (header[0]&0x0f) != 0x0 )
222 if( stream_Read( p_demux->s, aux, 6 ) < 6 )
224 msg_Warn( p_demux, "cannot read" );
227 i_aux = GetWLE( aux );
228 fcc = VLC_FOURCC( aux[2], aux[3], aux[4], aux[5] );
230 msg_Dbg( p_demux, "Belekas: %d - size=%d fcc=%4.4s",
231 header[0]&0xf, i_aux, (char*)&fcc );
233 if( fcc == VLC_FOURCC( 'S', 'U', 'B', 'T' ) && i_aux > 2 )
235 if( p_sys->p_sub == NULL )
237 p_sys->fmt_sub.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
238 p_sys->p_sub = es_out_Add( p_demux->out, &p_sys->fmt_sub );
239 es_out_Control( p_demux->out, ES_OUT_SET_ES, p_sys->p_sub );
241 stream_Read( p_demux->s, NULL, 2 );
243 if( ( p_frame = stream_Block( p_demux->s, i_aux - 2 ) ) )
245 uint8_t *p = p_frame->p_buffer;
247 while( p < &p_frame->p_buffer[p_frame->i_buffer] && *p != 0 )
251 if( *p == 0 && p + 1 < &p_frame->p_buffer[p_frame->i_buffer] )
253 p_frame->i_buffer -= p + 1 - p_frame->p_buffer;
254 p_frame->p_buffer = p + 1;
257 /* Skip the first part (it is the language name) */
258 p_frame->i_pts = VLC_TS_0 + p_sys->i_pcr;
259 p_frame->i_dts = VLC_TS_0 + p_sys->i_pcr + 4000000; /* 4s */
261 es_out_Send( p_demux->out, p_sys->p_sub, p_frame );
266 /* We skip this extra data */
267 if( stream_Read( p_demux->s, NULL, i_aux ) < i_aux )
269 msg_Warn( p_demux, "cannot read" );
276 /* msg_Dbg( p_demux, "frame video size=%d", i_size ); */
277 if( i_size > 0 && ( p_frame = stream_Block( p_demux->s, i_size ) ) )
279 p_frame->i_dts = VLC_TS_0 + p_sys->i_pcr;
280 es_out_Send( p_demux->out, p_sys->p_video, p_frame );
285 i_size = header[3] | ( header[4] << 8 );
288 /* msg_Dbg( p_demux, "frame audio size=%d", i_size ); */
289 if( p_sys->fmt_audio.i_codec == VLC_FOURCC( 'a', 'r', 'a', 'w' ) )
292 stream_Read( p_demux->s, h, 4 );
294 p_sys->fmt_audio.audio.i_channels = h[1];
295 p_sys->fmt_audio.audio.i_rate = GetWLE( &h[2] );
299 if( p_sys->p_audio == NULL )
301 p_sys->p_audio = es_out_Add( p_demux->out, &p_sys->fmt_audio );
304 if( ( p_frame = stream_Block( p_demux->s, i_size ) ) )
307 p_frame->i_pts = VLC_TS_0 + p_sys->i_pcr;
308 es_out_Send( p_demux->out, p_sys->p_audio, p_frame );
312 p_sys->i_pcr += p_sys->i_pcr_inc;
313 if( p_sys->i_time >= 0 )
315 p_sys->i_time += p_sys->i_pcr_inc;
321 /*****************************************************************************
323 *****************************************************************************/
324 static int Control( demux_t *p_demux, int i_query, va_list args )
326 demux_sys_t *p_sys = p_demux->p_sys;
328 bool b_bool, *pb_bool;
333 case DEMUX_GET_POSITION:
334 pf = (double*) va_arg( args, double* );
335 i64 = stream_Size( p_demux->s );
338 double current = stream_Tell( p_demux->s );
339 *pf = current / (double)i64;
347 case DEMUX_SET_POSITION:
348 f = (double) va_arg( args, double );
349 i64 = stream_Size( p_demux->s );
351 if( stream_Seek( p_demux->s, (int64_t)(i64 * f) ) || ReSynch( p_demux ) )
354 p_sys->i_time = -1; /* Invalidate time display */
358 pi64 = (int64_t*)va_arg( args, int64_t * );
359 if( p_sys->i_time < 0 )
364 *pi64 = p_sys->i_time;
368 case DEMUX_GET_LENGTH:
369 pi64 = (int64_t*)va_arg( args, int64_t * );
370 if( p_sys->i_mux_rate > 0 )
372 *pi64 = (int64_t)1000000 * ( stream_Size( p_demux->s ) / 50 ) / p_sys->i_mux_rate;
380 pf = (double*)va_arg( args, double * );
381 *pf = (double)1000000.0 / (double)p_sys->i_pcr_inc;
384 case DEMUX_CAN_RECORD:
385 pb_bool = (bool*)va_arg( args, bool * );
389 case DEMUX_SET_RECORD_STATE:
390 b_bool = (bool)va_arg( args, int );
393 stream_Control( p_demux->s, STREAM_SET_RECORD_STATE, false );
394 p_sys->b_start_record = b_bool;
404 /*****************************************************************************
406 *****************************************************************************/
407 static int ReSynch( demux_t *p_demux )
409 const uint8_t *p_peek;
413 while( vlc_object_alive (p_demux) )
415 if( ( i_peek = stream_Peek( p_demux->s, &p_peek, 1024 ) ) < 8 )
421 while( i_skip < i_peek - 4 )
423 if( !memcmp( p_peek, "NSVf", 4 )
424 || !memcmp( p_peek, "NSVs", 4 ) )
428 stream_Read( p_demux->s, NULL, i_skip );
436 stream_Read( p_demux->s, NULL, i_skip );
441 /*****************************************************************************
443 *****************************************************************************/
444 static int ReadNSVf( demux_t *p_demux )
446 /* demux_sys_t *p_sys = p_demux->p_sys; */
450 msg_Dbg( p_demux, "new NSVf chunk" );
451 if( stream_Peek( p_demux->s, &p, 8 ) < 8 )
456 i_size = GetDWLE( &p[4] );
457 msg_Dbg( p_demux, " - size=%d", i_size );
459 return stream_Read( p_demux->s, NULL, i_size ) == i_size ? VLC_SUCCESS : VLC_EGENERIC;
461 /*****************************************************************************
463 *****************************************************************************/
464 static int ReadNSVs( demux_t *p_demux )
466 demux_sys_t *p_sys = p_demux->p_sys;
470 if( stream_Read( p_demux->s, header, 19 ) < 19 )
472 msg_Warn( p_demux, "cannot read" );
477 switch( ( fcc = VLC_FOURCC( header[4], header[5], header[6], header[7] ) ) )
479 case VLC_FOURCC( 'V', 'P', '3', ' ' ):
480 case VLC_FOURCC( 'V', 'P', '3', '0' ):
481 fcc = VLC_FOURCC( 'V', 'P', '3', '0' );
484 case VLC_FOURCC( 'V', 'P', '3', '1' ):
485 fcc = VLC_FOURCC( 'V', 'P', '3', '1' );
488 case VLC_FOURCC( 'V', 'P', '5', ' ' ):
489 case VLC_FOURCC( 'V', 'P', '5', '0' ):
490 fcc = VLC_FOURCC( 'V', 'P', '5', '0' );
492 case VLC_FOURCC( 'V', 'P', '6', '0' ):
493 case VLC_FOURCC( 'V', 'P', '6', '1' ):
494 case VLC_FOURCC( 'V', 'P', '6', '2' ):
495 case VLC_FOURCC( 'V', 'P', '8', '0' ):
496 case VLC_FOURCC( 'H', '2', '6', '4' ):
497 case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
500 msg_Warn( p_demux, "unknown codec %4.4s", (char *)&fcc );
503 if( fcc != VLC_FOURCC( 'N', 'O', 'N', 'E' ) && fcc != p_sys->fmt_video.i_codec )
505 es_format_Init( &p_sys->fmt_video, VIDEO_ES, fcc );
506 p_sys->fmt_video.video.i_width = GetWLE( &header[12] );
507 p_sys->fmt_video.video.i_height = GetWLE( &header[14] );
510 es_out_Del( p_demux->out, p_sys->p_video );
512 p_sys->p_video = es_out_Add( p_demux->out, &p_sys->fmt_video );
514 msg_Dbg( p_demux, " - video `%4.4s' %dx%d",
516 p_sys->fmt_video.video.i_width,
517 p_sys->fmt_video.video.i_height );
521 switch( ( fcc = VLC_FOURCC( header[8], header[9], header[10], header[11] ) ) )
523 case VLC_FOURCC( 'M', 'P', '3', ' ' ):
524 fcc = VLC_FOURCC( 'm', 'p', 'g', 'a' );
526 case VLC_FOURCC( 'P', 'C', 'M', ' ' ):
527 fcc = VLC_FOURCC( 'a', 'r', 'a', 'w' );
529 case VLC_FOURCC( 'A', 'A', 'C', ' ' ):
530 case VLC_FOURCC( 'A', 'A', 'C', 'P' ):
531 fcc = VLC_FOURCC( 'm', 'p', '4', 'a' );
533 case VLC_FOURCC( 'S', 'P', 'X', ' ' ):
534 fcc = VLC_FOURCC( 's', 'p', 'x', ' ' );
536 case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
539 msg_Warn( p_demux, "unknown codec %4.4s", (char *)&fcc );
543 if( fcc != VLC_FOURCC( 'N', 'O', 'N', 'E' ) && fcc != p_sys->fmt_audio.i_codec )
545 msg_Dbg( p_demux, " - audio `%4.4s'", (char*)&fcc );
549 es_out_Del( p_demux->out, p_sys->p_audio );
550 p_sys->p_audio = NULL;
552 es_format_Init( &p_sys->fmt_audio, AUDIO_ES, fcc );
555 if( header[16]&0x80 )
557 /* Fractional frame rate */
558 switch( header[16]&0x03 )
561 p_sys->i_pcr_inc = 33333; /* 300000/9 */
563 case 1: /* 29.97 fps */
564 p_sys->i_pcr_inc = 33367; /* 300300/9 */
567 p_sys->i_pcr_inc = 40000; /* 360000/9 */
569 case 3: /* 23.98 fps */
570 p_sys->i_pcr_inc = 41700; /* 375300/9 */
574 if( header[16] < 0xc0 )
575 p_sys->i_pcr_inc = p_sys->i_pcr_inc * (((header[16] ^ 0x80) >> 2 ) +1 );
577 p_sys->i_pcr_inc = p_sys->i_pcr_inc / (((header[16] ^ 0xc0) >> 2 ) +1 );
579 else if( header[16] != 0 )
581 /* Integer frame rate */
582 p_sys->i_pcr_inc = 1000000 / header[16];
586 msg_Dbg( p_demux, "invalid fps (0x00)" );
587 p_sys->i_pcr_inc = 40000;
589 //msg_Dbg( p_demux, " - fps=%.3f", 1000000.0 / (double)p_sys->i_pcr_inc );