1 /*****************************************************************************
2 * rawdv.c : raw dv input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001 VideoLAN
5 * $Id: rawdv.c,v 1.6 2003/04/27 14:56:47 gbazin Exp $
7 * Authors: Gildas Bazin <gbazin@netcourrier.com>
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
28 #include <string.h> /* strdup() */
32 #include <vlc/input.h>
34 #include <sys/types.h>
36 #include <codecs.h> /* BITMAPINFOHEADER, WAVEFORMATEX */
38 /*****************************************************************************
39 A little bit of background information (copied over from libdv glossary).
41 - DIF block: A block of 80 bytes. This is the basic data framing unit of the
42 DVC tape format, analogous to sectors of hard disc.
44 - Video Section: Each DIF sequence contains a video section, consisting of
45 135 DIF blocks, which are further subdivided into Video Segments.
47 - Video Segment: A video segment consists of 5 DIF blocks, each corresponding
48 to a single compressed macroblock.
50 *****************************************************************************/
53 /*****************************************************************************
55 *****************************************************************************/
56 #define DV_PAL_FRAME_SIZE 144000
57 #define DV_NTSC_FRAME_SIZE 122000
59 /*****************************************************************************
60 * Definitions of structures used by this plugin
61 *****************************************************************************/
63 int8_t sct; /* Section type (header,subcode,aux,audio,video) */
64 int8_t dsn; /* DIF sequence number (0-12) */
65 int fsc; /* First (0)/Second channel (1) */
66 int8_t dbn; /* DIF block number (0-134) */
70 int dsf; /* DIF sequence flag: 525/60 (0) or 625,50 (1) */
84 es_descriptor_t *p_video_es;
85 es_descriptor_t *p_audio_es;
87 /* codec specific stuff */
88 BITMAPINFOHEADER *p_bih;
94 /* program clock reference (in units of 90kHz) */
98 /*****************************************************************************
100 *****************************************************************************/
101 static int Activate ( vlc_object_t * );
102 static void Deactivate( vlc_object_t * );
103 static int Demux ( input_thread_t * );
105 static uint32_t GetDWBE( uint8_t *p_buff )
107 return (uint32_t)p_buff[3] | ( ((uint32_t)p_buff[2]) << 8 ) |
108 ( ((uint32_t)p_buff[1]) << 16 ) | ( ((uint32_t)p_buff[0]) << 24 );
111 /*****************************************************************************
113 *****************************************************************************/
115 set_description( _("raw dv demuxer") );
116 set_capability( "demux", 2 );
117 set_callbacks( Activate, NULL );
118 add_shortcut( "rawdv" );
121 /*****************************************************************************
122 * Activate: initializes raw dv demux structures
123 *****************************************************************************/
124 static int Activate( vlc_object_t * p_this )
126 input_thread_t *p_input = (input_thread_t *)p_this;
127 byte_t *p_peek, *p_peek_backup;
129 demux_sys_t *p_rawdv;
130 dv_header_t dv_header;
134 /* It isn't easy to recognize a raw dv stream. The chances that we'll
135 * mistake a stream from another type for a raw dv stream are too high, so
136 * we'll rely on the file extension to trigger this demux. Alternatively,
137 * it is possible to force this demux. */
139 /* Check for dv file extension */
140 psz_ext = strrchr ( p_input->psz_name, '.' );
141 if( ( !psz_ext || strcasecmp( psz_ext, ".dv") )&&
142 ( !p_input->psz_demux || strcmp(p_input->psz_demux, "rawdv") ) )
147 p_input->pf_demux = Demux;
149 /* Have a peep at the show. */
150 if( input_Peek(p_input, &p_peek, DV_PAL_FRAME_SIZE) < DV_NTSC_FRAME_SIZE )
152 /* Stream too short ... */
153 msg_Err( p_input, "cannot peek()" );
156 p_peek_backup = p_peek;
158 /* fill in the dv_id_t structure */
159 i_dword = GetDWBE( p_peek ); p_peek += 4;
160 dv_id.sct = i_dword >> (32 - 3);
162 dv_id.dsn = i_dword >> (32 - 4);
164 dv_id.fsc = i_dword >> (32 - 1);
166 dv_id.dbn = i_dword >> (32 - 8);
171 msg_Warn( p_input, "not a raw dv stream header" );
175 /* fill in the dv_header_t structure */
176 dv_header.dsf = i_dword >> (32 - 1);
178 if( i_dword >> (32 - 1) ) /* incorrect bit */
180 msg_Warn( p_input, "incorrect bit" );
184 i_dword = GetDWBE( p_peek ); p_peek += 4;
186 dv_header.apt = i_dword >> (32 - 3);
188 dv_header.tf1 = i_dword >> (32 - 1);
190 dv_header.ap1 = i_dword >> (32 - 3);
192 dv_header.tf2 = i_dword >> (32 - 1);
194 dv_header.ap2 = i_dword >> (32 - 3);
196 dv_header.tf3 = i_dword >> (32 - 1);
198 dv_header.ap3 = i_dword >> (32 - 3);
200 p_peek += 72; /* skip rest of DIF block */
203 /* Setup the structures for our demuxer */
204 if( !( p_rawdv = malloc( sizeof( demux_sys_t ) ) ) )
206 msg_Err( p_input, "out of memory" );
209 memset( p_rawdv, 0, sizeof( demux_sys_t ) );
210 p_rawdv->p_bih = NULL;
211 p_rawdv->p_wf = NULL;
212 p_input->p_demux_data = p_rawdv;
214 p_rawdv->p_bih = (BITMAPINFOHEADER *) malloc( sizeof(BITMAPINFOHEADER) );
215 if( !p_rawdv->p_bih )
217 msg_Err( p_input, "out of memory" );
220 p_rawdv->p_bih->biSize = sizeof(BITMAPINFOHEADER);
221 p_rawdv->p_bih->biCompression = VLC_FOURCC( 'd','v','s','d' );
222 p_rawdv->p_bih->biSize = 40;
223 p_rawdv->p_bih->biWidth = 720;
224 p_rawdv->p_bih->biHeight = dv_header.dsf ? 576 : 480;
225 p_rawdv->p_bih->biPlanes = 1;
226 p_rawdv->p_bih->biBitCount = 24;
227 p_rawdv->p_bih->biSizeImage =
228 p_rawdv->p_bih->biWidth * p_rawdv->p_bih->biHeight
229 * (p_rawdv->p_bih->biBitCount >> 3);
231 /* Properties of our video */
234 p_rawdv->frame_size = 12 * 150 * 80;
235 p_rawdv->f_rate = 25;
239 p_rawdv->frame_size = 10 * 150 * 80;
240 p_rawdv->f_rate = 29.97;
245 p_peek = p_peek_backup + 80*6+80*16*3 + 3; /* beginning of AAUX pack */
247 if( *p_peek != 0x50 || *p_peek != 0x51 )
249 msg_Err( p_input, "AAUX should begin with 0x50" );
253 p_rawdv->p_wf = (WAVEFORMATEX *)malloc( sizeof(WAVEFORMATEX) );
256 msg_Err( p_input, "out of memory" );
260 p_rawdv->p_wf->wFormatTag = 0;
261 p_rawdv->p_wf->nChannels = 2;
262 p_rawdv->p_wf->nSamplesPerSec = 44100; /* FIXME */
263 p_rawdv->p_wf->nAvgBytesPerSec = p_rawdv->f_rate * p_rawdv->frame_size;
264 p_rawdv->p_wf->nBlockAlign = p_rawdv->frame_size;
265 p_rawdv->p_wf->wBitsPerSample = 16;
266 p_rawdv->p_wf->cbSize = 0;
269 /* necessary because input_SplitBuffer() will only get
270 * INPUT_DEFAULT_BUFSIZE bytes at a time. */
271 p_input->i_bufsize = p_rawdv->frame_size;
273 /* Create one program */
274 vlc_mutex_lock( &p_input->stream.stream_lock );
275 if( input_InitStream( p_input, 0 ) == -1)
277 vlc_mutex_unlock( &p_input->stream.stream_lock );
278 msg_Err( p_input, "cannot init stream" );
281 if( input_AddProgram( p_input, 0, 0) == NULL )
283 vlc_mutex_unlock( &p_input->stream.stream_lock );
284 msg_Err( p_input, "cannot add program" );
287 p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
288 p_input->stream.i_mux_rate = p_rawdv->frame_size * p_rawdv->f_rate;
289 vlc_mutex_unlock( &p_input->stream.stream_lock );
291 /* Add video stream */
292 vlc_mutex_lock( &p_input->stream.stream_lock );
293 p_rawdv->p_video_es = input_AddES( p_input,
294 p_input->stream.p_selected_program,
296 p_rawdv->p_video_es->i_stream_id = 0;
297 p_rawdv->p_video_es->i_fourcc = VLC_FOURCC( 'd','v','s','d' );
298 p_rawdv->p_video_es->i_cat = VIDEO_ES;
299 p_rawdv->p_video_es->p_bitmapinfoheader = (void *)p_rawdv->p_bih;
300 input_SelectES( p_input, p_rawdv->p_video_es );
301 vlc_mutex_unlock( &p_input->stream.stream_lock );
303 /* Add audio stream */
304 vlc_mutex_lock( &p_input->stream.stream_lock );
305 p_rawdv->p_audio_es = input_AddES( p_input,
306 p_input->stream.p_selected_program,
308 p_rawdv->p_audio_es->i_stream_id = 1;
309 p_rawdv->p_audio_es->i_fourcc = VLC_FOURCC( 'd','v','a','u' );
310 p_rawdv->p_audio_es->i_cat = AUDIO_ES;
311 p_rawdv->p_audio_es->p_waveformatex = (void *)p_rawdv->p_wf;
312 input_SelectES( p_input, p_rawdv->p_audio_es );
313 vlc_mutex_unlock( &p_input->stream.stream_lock );
321 if( p_rawdv->p_bih ) free( p_rawdv->p_bih );
322 if( p_rawdv->p_wf ) free( p_rawdv->p_wf );
323 Deactivate( (vlc_object_t *)p_input );
327 /*****************************************************************************
328 * Deactivate: frees unused data
329 *****************************************************************************/
330 static void Deactivate( vlc_object_t *p_this )
332 input_thread_t *p_input = (input_thread_t *)p_this;
333 demux_sys_t *p_rawdv = (demux_sys_t *)p_input->p_demux_data;
338 /*****************************************************************************
339 * Demux: reads and demuxes data packets
340 *****************************************************************************
341 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
342 *****************************************************************************/
343 static int Demux( input_thread_t * p_input )
345 demux_sys_t *p_rawdv = (demux_sys_t *)p_input->p_demux_data;
347 pes_packet_t *p_audio_pes;
348 data_packet_t *p_data;
351 if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
355 msg_Warn( p_input, "synchro reinit" );
357 /* If the user tried to seek in the stream, we need to make sure
358 * the new position is at a DIF block boundary. */
359 vlc_mutex_lock( &p_input->stream.stream_lock );
360 i_pos= p_input->stream.p_selected_area->i_tell;
361 vlc_mutex_unlock( &p_input->stream.stream_lock );
363 if( (i_pos % p_rawdv->frame_size) &&
364 p_input->stream.b_seekable &&
365 p_input->stream.i_method == INPUT_METHOD_FILE )
367 p_input->pf_seek( p_input, (i_pos / p_rawdv->frame_size)
368 * p_rawdv->frame_size );
369 input_AccessReinit( p_input );
373 /* Call the pace control */
374 input_ClockManageRef( p_input, p_input->stream.p_selected_program,
377 i_read = input_SplitBuffer( p_input, &p_data, p_rawdv->frame_size );
383 /* Build video PES packet */
384 if( p_rawdv->p_video_es->p_decoder_fifo )
386 p_pes = input_NewPES( p_input->p_method_data );
389 msg_Err( p_input, "out of memory" );
390 input_DeletePacket( p_input->p_method_data, p_data );
394 p_pes->i_rate = p_input->stream.control.i_rate;
395 p_pes->p_first = p_pes->p_last = p_data;
396 p_pes->i_pes_size = i_read;
397 p_pes->i_nb_data = 1;
399 input_ClockGetTS( p_input, p_input->stream.p_selected_program,
403 /* Do the same for audio */
404 if( p_rawdv->p_audio_es->p_decoder_fifo )
406 p_audio_pes = input_NewPES( p_input->p_method_data );
409 msg_Err( p_input, "out of memory" );
410 input_DeletePacket( p_input->p_method_data, p_data );
413 p_audio_pes->i_rate = p_input->stream.control.i_rate;
415 if( p_rawdv->p_video_es->p_decoder_fifo )
416 p_audio_pes->p_first = p_audio_pes->p_last =
417 input_ShareBuffer( p_input->p_method_data, p_data->p_buffer );
419 p_audio_pes->p_first = p_audio_pes->p_last = p_data;
421 p_audio_pes->p_first->p_next = p_data->p_next;
422 p_audio_pes->p_first->p_payload_start = p_data->p_payload_start;
423 p_audio_pes->p_first->p_payload_end = p_data->p_payload_end;
424 p_audio_pes->i_pes_size = i_read;
425 p_audio_pes->i_nb_data = 1;
427 input_ClockGetTS( p_input, p_input->stream.p_selected_program,
431 /* Decode PES packets if stream is selected */
432 if( p_rawdv->p_video_es->p_decoder_fifo )
433 input_DecodePES( p_rawdv->p_video_es->p_decoder_fifo, p_pes );
434 if( p_rawdv->p_audio_es->p_decoder_fifo )
435 input_DecodePES( p_rawdv->p_audio_es->p_decoder_fifo, p_audio_pes );
437 p_rawdv->i_pcr += ( 90000 / p_rawdv->f_rate );
439 if( !p_rawdv->p_video_es->p_decoder_fifo &&
440 !p_rawdv->p_audio_es->p_decoder_fifo )
441 input_DeletePacket( p_input->p_method_data, p_data );