1 /*****************************************************************************
2 * nsv.c: NullSoft Video demuxer.
3 *****************************************************************************
4 * Copyright (C) 2004 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 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
30 #include <vlc_demux.h>
33 * - implement NSVf parsing (to get meta data)
34 * - implement missing Control (and in the right way)
38 /*****************************************************************************
40 *****************************************************************************/
41 static int Open ( vlc_object_t * );
42 static void Close ( vlc_object_t * );
45 set_description( _("NullSoft demuxer" ) );
46 set_capability( "demux2", 10 );
47 set_category( CAT_INPUT );
48 set_subcategory( SUBCAT_INPUT_DEMUX );
49 set_callbacks( Open, Close );
50 add_shortcut( "nsv" );
53 /*****************************************************************************
55 *****************************************************************************/
59 es_format_t fmt_audio;
62 es_format_t fmt_video;
73 static int Demux ( demux_t *p_demux );
74 static int Control( demux_t *p_demux, int i_query, va_list args );
76 static int ReSynch( demux_t *p_demux );
78 static int ReadNSVf( demux_t *p_demux );
79 static int ReadNSVs( demux_t *p_demux );
81 /*****************************************************************************
83 *****************************************************************************/
84 static int Open( vlc_object_t *p_this )
86 demux_t *p_demux = (demux_t*)p_this;
91 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
94 if( strncmp( (char *)p_peek, "NSVf", 4 )
95 && strncmp( (char *)p_peek, "NSVs", 4 ))
97 /* In case we had force this demuxer we try to resynch */
98 if( strcmp( p_demux->psz_demux, "nsv" ) || ReSynch( p_demux ) )
104 /* Fill p_demux field */
105 p_demux->pf_demux = Demux;
106 p_demux->pf_control = Control;
107 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
109 es_format_Init( &p_sys->fmt_audio, AUDIO_ES, 0 );
110 p_sys->p_audio = NULL;
112 es_format_Init( &p_sys->fmt_video, VIDEO_ES, 0 );
113 p_sys->p_video = NULL;
115 es_format_Init( &p_sys->fmt_sub, SPU_ES, 0 );
120 p_sys->i_pcr_inc = 0;
125 /*****************************************************************************
127 *****************************************************************************/
128 static void Close( vlc_object_t *p_this )
130 demux_t *p_demux = (demux_t*)p_this;
131 demux_sys_t *p_sys = p_demux->p_sys;
137 /*****************************************************************************
139 *****************************************************************************/
140 static int Demux( demux_t *p_demux )
142 demux_sys_t *p_sys = p_demux->p_sys;
152 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
154 msg_Warn( p_demux, "cannot peek" );
158 if( !strncmp( (char *)p_peek, "NSVf", 4 ) )
160 if( ReadNSVf( p_demux ) )
165 else if( !strncmp( (char *)p_peek, "NSVs", 4 ) )
167 if( ReadNSVs( p_demux ) )
173 else if( GetWLE( p_peek ) == 0xbeef )
175 /* Next frame of the current NSVs chunk */
176 if( stream_Read( p_demux->s, NULL, 2 ) < 2 )
178 msg_Warn( p_demux, "cannot read" );
185 msg_Err( p_demux, "invalid signature 0x%x (%4.4s)", *(uint32_t*)p_peek, (char*)p_peek );
186 if( ReSynch( p_demux ) )
193 if( stream_Read( p_demux->s, header, 5 ) < 5 )
195 msg_Warn( p_demux, "cannot read" );
200 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
203 i_size = ( header[0] >> 4 ) | ( header[1] << 4 ) | ( header[2] << 12 );
207 if( (header[0]&0x0f) != 0x0 )
212 if( stream_Read( p_demux->s, aux, 6 ) < 6 )
214 msg_Warn( p_demux, "cannot read" );
217 i_aux = GetWLE( aux );
218 fcc = VLC_FOURCC( aux[2], aux[3], aux[4], aux[5] );
220 msg_Dbg( p_demux, "Belekas: %d - size=%d fcc=%4.4s",
221 header[0]&0xf, i_aux, (char*)&fcc );
223 if( fcc == VLC_FOURCC( 'S', 'U', 'B', 'T' ) && i_aux > 2 )
225 if( p_sys->p_sub == NULL )
227 p_sys->fmt_sub.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
228 p_sys->p_sub = es_out_Add( p_demux->out, &p_sys->fmt_sub );
229 es_out_Control( p_demux->out, ES_OUT_SET_ES, p_sys->p_sub );
231 stream_Read( p_demux->s, NULL, 2 );
233 if( ( p_frame = stream_Block( p_demux->s, i_aux - 2 ) ) )
235 uint8_t *p = p_frame->p_buffer;
237 while( p < &p_frame->p_buffer[p_frame->i_buffer] && *p != 0 )
241 if( *p == 0 && p + 1 < &p_frame->p_buffer[p_frame->i_buffer] )
243 p_frame->i_buffer -= p + 1 - p_frame->p_buffer;
244 p_frame->p_buffer = p + 1;
247 /* Skip the first part (it is the language name) */
248 p_frame->i_pts = p_sys->i_pcr;
249 p_frame->i_dts = p_sys->i_pcr + 4000000; /* 4s */
251 es_out_Send( p_demux->out, p_sys->p_sub, p_frame );
256 /* We skip this extra data */
257 if( stream_Read( p_demux->s, NULL, i_aux ) < i_aux )
259 msg_Warn( p_demux, "cannot read" );
266 /* msg_Dbg( p_demux, "frame video size=%d", i_size ); */
267 if( i_size > 0 && ( p_frame = stream_Block( p_demux->s, i_size ) ) )
269 p_frame->i_dts = p_sys->i_pcr;
270 es_out_Send( p_demux->out, p_sys->p_video, p_frame );
275 i_size = header[3] | ( header[4] << 8 );
278 /* msg_Dbg( p_demux, "frame audio size=%d", i_size ); */
279 if( p_sys->fmt_audio.i_codec == VLC_FOURCC( 'a', 'r', 'a', 'w' ) )
282 stream_Read( p_demux->s, h, 4 );
284 p_sys->fmt_audio.audio.i_channels = h[1];
285 p_sys->fmt_audio.audio.i_rate = GetWLE( &h[2] );
289 if( p_sys->p_audio == NULL )
291 p_sys->p_audio = es_out_Add( p_demux->out, &p_sys->fmt_audio );
294 if( ( p_frame = stream_Block( p_demux->s, i_size ) ) )
297 p_frame->i_pts = p_sys->i_pcr;
298 es_out_Send( p_demux->out, p_sys->p_audio, p_frame );
302 p_sys->i_pcr += p_sys->i_pcr_inc;
303 if( p_sys->i_time >= 0 )
305 p_sys->i_time += p_sys->i_pcr_inc;
311 /*****************************************************************************
313 *****************************************************************************/
314 static int Control( demux_t *p_demux, int i_query, va_list args )
316 demux_sys_t *p_sys = p_demux->p_sys;
322 case DEMUX_GET_POSITION:
323 pf = (double*) va_arg( args, double* );
324 i64 = stream_Size( p_demux->s );
327 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
335 case DEMUX_SET_POSITION:
336 f = (double) va_arg( args, double );
337 i64 = stream_Size( p_demux->s );
339 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
340 if( stream_Seek( p_demux->s, (int64_t)(i64 * f) ) || ReSynch( p_demux ) )
344 p_sys->i_time = -1; /* Invalidate time display */
348 pi64 = (int64_t*)va_arg( args, int64_t * );
349 if( p_sys->i_time < 0 )
354 *pi64 = p_sys->i_time;
358 case DEMUX_GET_LENGTH:
359 pi64 = (int64_t*)va_arg( args, int64_t * );
360 if( p_sys->i_mux_rate > 0 )
362 *pi64 = (int64_t)1000000 * ( stream_Size( p_demux->s ) / 50 ) / p_sys->i_mux_rate;
370 pf = (double*)va_arg( args, double * );
371 *pf = (double)1000000.0 / (double)p_sys->i_pcr_inc;
380 /*****************************************************************************
382 *****************************************************************************/
383 static int ReSynch( demux_t *p_demux )
389 while( !p_demux->b_die )
391 if( ( i_peek = stream_Peek( p_demux->s, &p_peek, 1024 ) ) < 8 )
397 while( i_skip < i_peek - 4 )
399 if( !strncmp( (char *)p_peek, "NSVf", 4 )
400 || !strncmp( (char *)p_peek, "NSVs", 4 ) )
404 stream_Read( p_demux->s, NULL, i_skip );
412 stream_Read( p_demux->s, NULL, i_skip );
417 /*****************************************************************************
419 *****************************************************************************/
420 static int ReadNSVf( demux_t *p_demux )
422 /* demux_sys_t *p_sys = p_demux->p_sys; */
426 msg_Dbg( p_demux, "new NSVf chunk" );
427 if( stream_Peek( p_demux->s, &p, 8 ) < 8 )
432 i_size = GetDWLE( &p[4] );
433 msg_Dbg( p_demux, " - size=%d", i_size );
435 return stream_Read( p_demux->s, NULL, i_size ) == i_size ? VLC_SUCCESS : VLC_EGENERIC;
437 /*****************************************************************************
439 *****************************************************************************/
440 static int ReadNSVs( demux_t *p_demux )
442 demux_sys_t *p_sys = p_demux->p_sys;
446 if( stream_Read( p_demux->s, header, 19 ) < 19 )
448 msg_Warn( p_demux, "cannot read" );
453 switch( ( fcc = VLC_FOURCC( header[4], header[5], header[6], header[7] ) ) )
455 case VLC_FOURCC( 'V', 'P', '3', ' ' ):
456 case VLC_FOURCC( 'V', 'P', '3', '1' ):
457 fcc = VLC_FOURCC( 'V', 'P', '3', '1' );
459 case VLC_FOURCC( 'V', 'P', '6', '0' ):
460 case VLC_FOURCC( 'V', 'P', '6', '1' ):
461 case VLC_FOURCC( 'V', 'P', '6', '2' ):
462 case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
465 msg_Warn( p_demux, "unknown codec %4.4s", (char *)&fcc );
468 if( fcc != VLC_FOURCC( 'N', 'O', 'N', 'E' ) && fcc != p_sys->fmt_video.i_codec )
470 es_format_Init( &p_sys->fmt_video, VIDEO_ES, fcc );
471 p_sys->fmt_video.video.i_width = GetWLE( &header[12] );
472 p_sys->fmt_video.video.i_height = GetWLE( &header[14] );
475 es_out_Del( p_demux->out, p_sys->p_video );
477 p_sys->p_video = es_out_Add( p_demux->out, &p_sys->fmt_video );
479 msg_Dbg( p_demux, " - video `%4.4s' %dx%d",
481 p_sys->fmt_video.video.i_width,
482 p_sys->fmt_video.video.i_height );
486 switch( ( fcc = VLC_FOURCC( header[8], header[9], header[10], header[11] ) ) )
488 case VLC_FOURCC( 'M', 'P', '3', ' ' ):
489 fcc = VLC_FOURCC( 'm', 'p', 'g', 'a' );
491 case VLC_FOURCC( 'P', 'C', 'M', ' ' ):
492 fcc = VLC_FOURCC( 'a', 'r', 'a', 'w' );
494 case VLC_FOURCC( 'A', 'A', 'C', ' ' ):
495 case VLC_FOURCC( 'A', 'A', 'C', 'P' ):
496 fcc = VLC_FOURCC( 'm', 'p', '4', 'a' );
498 case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
501 msg_Warn( p_demux, "unknown codec %4.4s", (char *)&fcc );
505 if( fcc != VLC_FOURCC( 'N', 'O', 'N', 'E' ) && fcc != p_sys->fmt_audio.i_codec )
507 msg_Dbg( p_demux, " - audio `%4.4s'", (char*)&fcc );
511 es_out_Del( p_demux->out, p_sys->p_audio );
512 p_sys->p_audio = NULL;
514 es_format_Init( &p_sys->fmt_audio, AUDIO_ES, fcc );
517 if( header[16]&0x80 )
519 /* Fractional frame rate */
520 switch( header[16]&0x03 )
523 p_sys->i_pcr_inc = 33333; /* 300000/9 */
525 case 1: /* 29.97 fps */
526 p_sys->i_pcr_inc = 33367; /* 300300/9 */
529 p_sys->i_pcr_inc = 40000; /* 360000/9 */
531 case 3: /* 23.98 fps */
532 p_sys->i_pcr_inc = 41700; /* 375300/9 */
536 if( header[16] < 0xc0 )
537 p_sys->i_pcr_inc = p_sys->i_pcr_inc * (((header[16] ^ 0x80) >> 2 ) +1 );
539 p_sys->i_pcr_inc = p_sys->i_pcr_inc / (((header[16] ^ 0xc0) >> 2 ) +1 );
541 else if( header[16] != 0 )
543 /* Integer frame rate */
544 p_sys->i_pcr_inc = 1000000 / header[16];
548 msg_Dbg( p_demux, "invalid fps (0x00)" );
549 p_sys->i_pcr_inc = 40000;
551 //msg_Dbg( p_demux, " - fps=%.3f", 1000000.0 / (double)p_sys->i_pcr_inc );