1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001, 2002, 2006 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include <vlc_codec.h>
36 #include <vlc_block.h>
39 #include "vlc_block_helper.h"
40 #include "packetizer_helper.h"
42 /*****************************************************************************
44 *****************************************************************************/
45 static int Open ( vlc_object_t * );
46 static void Close( vlc_object_t * );
49 set_category( CAT_SOUT )
50 set_subcategory( SUBCAT_SOUT_PACKETIZER )
51 set_description( N_("VC-1 packetizer") )
52 set_capability( "packetizer", 50 )
53 set_callbacks( Open, Close )
56 /*****************************************************************************
58 *****************************************************************************/
64 packetizer_t packetizer;
66 /* Current sequence header */
67 bool b_sequence_header;
71 bool b_advanced_profile;
73 bool b_frame_interpolation;
74 bool b_range_reduction;
86 /* Current frame being built */
91 mtime_t i_interpolated_dts;
96 IDU_TYPE_SEQUENCE_HEADER = 0x0f,
97 IDU_TYPE_ENTRY_POINT = 0x0e,
98 IDU_TYPE_FRAME = 0x0D,
99 IDU_TYPE_FIELD = 0x0C,
100 IDU_TYPE_SLICE = 0x0B,
101 IDU_TYPE_END_OF_SEQUENCE = 0x0A,
103 IDU_TYPE_SEQUENCE_LEVEL_USER_DATA = 0x1F,
104 IDU_TYPE_ENTRY_POINT_USER_DATA = 0x1E,
105 IDU_TYPE_FRAME_USER_DATA = 0x1D,
106 IDU_TYPE_FIELD_USER_DATA = 0x1C,
107 IDU_TYPE_SLICE_USER_DATA = 0x1B,
110 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block );
112 static void PacketizeReset( void *p_private, bool b_broken );
113 static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t * );
114 static int PacketizeValidate( void *p_private, block_t * );
116 static block_t *ParseIDU( decoder_t *p_dec, bool *pb_used_ts, block_t *p_frag );
118 static const uint8_t p_vc1_startcode[3] = { 0x00, 0x00, 0x01 };
119 /*****************************************************************************
120 * Open: probe the packetizer and return score
121 *****************************************************************************
122 * Tries to launch a decoder and return score so that the interface is able
124 *****************************************************************************/
125 static int Open( vlc_object_t *p_this )
127 decoder_t *p_dec = (decoder_t*)p_this;
128 decoder_sys_t *p_sys;
130 if( p_dec->fmt_in.i_codec != VLC_FOURCC( 'W', 'V', 'C', '1' ) )
133 p_dec->pf_packetize = Packetize;
135 /* Create the output format */
136 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
137 p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
139 packetizer_Init( &p_sys->packetizer,
140 p_vc1_startcode, sizeof(p_vc1_startcode),
142 PacketizeReset, PacketizeParse, PacketizeValidate, p_dec );
144 p_sys->b_sequence_header = false;
145 p_sys->sh.p_sh = NULL;
146 p_sys->b_entry_point = false;
147 p_sys->ep.p_ep = NULL;
149 p_sys->b_frame = false;
150 p_sys->p_frame = NULL;
151 p_sys->pp_last = &p_sys->p_frame;
153 p_sys->i_interpolated_dts = -1;
155 if( p_dec->fmt_out.i_extra > 0 )
157 uint8_t *p_extra = p_dec->fmt_out.p_extra;
159 /* With (some) ASF the first byte has to be stripped */
160 if( p_extra[0] != 0x00 )
162 memcpy( &p_extra[0], &p_extra[1], p_dec->fmt_out.i_extra - 1 );
163 p_dec->fmt_out.i_extra--;
167 if( p_dec->fmt_out.i_extra > 0 )
168 packetizer_Header( &p_sys->packetizer,
169 p_dec->fmt_out.p_extra, p_dec->fmt_out.i_extra );
175 /*****************************************************************************
177 *****************************************************************************/
178 static void Close( vlc_object_t *p_this )
180 decoder_t *p_dec = (decoder_t*)p_this;
181 decoder_sys_t *p_sys = p_dec->p_sys;
183 packetizer_Clean( &p_sys->packetizer );
185 block_Release( p_sys->p_frame );
189 /*****************************************************************************
190 * Packetize: packetize an access unit
191 *****************************************************************************/
192 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
194 decoder_sys_t *p_sys = p_dec->p_sys;
196 return packetizer_Packetize( &p_sys->packetizer, pp_block );
199 static void PacketizeReset( void *p_private, bool b_broken )
201 decoder_t *p_dec = p_private;
202 decoder_sys_t *p_sys = p_dec->p_sys;
207 block_ChainRelease( p_sys->p_frame );
208 p_sys->p_frame = NULL;
209 p_sys->pp_last = &p_sys->p_frame;
210 p_sys->b_frame = false;
212 p_sys->i_interpolated_dts = 0;
214 static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t *p_block )
216 decoder_t *p_dec = p_private;
218 return ParseIDU( p_dec, pb_ts_used, p_block );
221 static int PacketizeValidate( void *p_private, block_t *p_au )
223 decoder_t *p_dec = p_private;
224 decoder_sys_t *p_sys = p_dec->p_sys;
226 if( p_sys->i_interpolated_dts < 0 )
228 msg_Dbg( p_dec, "need a starting pts/dts" );
236 /* DecodeRIDU: decode the startcode emulation prevention (same than h264) */
237 static void DecodeRIDU( uint8_t *p_ret, int *pi_ret, uint8_t *src, int i_src )
239 uint8_t *end = &src[i_src];
240 uint8_t *dst_end = &p_ret[*pi_ret];
241 uint8_t *dst = p_ret;
243 while( src < end && dst < dst_end )
245 if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
257 *pi_ret = dst - p_ret;
259 /* BuildExtraData: gather sequence header and entry point */
260 static void BuildExtraData( decoder_t *p_dec )
262 decoder_sys_t *p_sys = p_dec->p_sys;
263 es_format_t *p_es = &p_dec->fmt_out;
265 if( !p_sys->b_sequence_header || !p_sys->b_entry_point )
268 i_extra = p_sys->sh.p_sh->i_buffer + p_sys->ep.p_ep->i_buffer;
269 if( p_es->i_extra != i_extra )
271 p_es->i_extra = i_extra;
272 p_es->p_extra = realloc( p_dec->fmt_out.p_extra, p_es->i_extra );
274 memcpy( p_es->p_extra,
275 p_sys->sh.p_sh->p_buffer, p_sys->sh.p_sh->i_buffer );
276 memcpy( (uint8_t*)p_es->p_extra + p_sys->sh.p_sh->i_buffer,
277 p_sys->ep.p_ep->p_buffer, p_sys->ep.p_ep->i_buffer );
279 /* ParseIDU: parse an Independent Decoding Unit */
280 static block_t *ParseIDU( decoder_t *p_dec, bool *pb_used_ts, block_t *p_frag )
282 decoder_sys_t *p_sys = p_dec->p_sys;
284 const idu_type_t idu = p_frag->p_buffer[3];
287 if( !p_sys->b_sequence_header && idu != IDU_TYPE_SEQUENCE_HEADER )
289 msg_Warn( p_dec, "waiting for sequence header" );
290 block_Release( p_frag );
293 if( p_sys->b_sequence_header && !p_sys->b_entry_point && idu != IDU_TYPE_ENTRY_POINT )
295 msg_Warn( p_dec, "waiting for entry point" );
296 block_Release( p_frag );
299 /* TODO we do not gather ENTRY_POINT and SEQUENCE_DATA user data
300 * But It should not be a problem for decoder */
302 /* Do we have completed a frame */
304 if( p_sys->b_frame &&
305 idu != IDU_TYPE_FRAME_USER_DATA &&
306 idu != IDU_TYPE_FIELD && idu != IDU_TYPE_FIELD_USER_DATA &&
307 idu != IDU_TYPE_SLICE && idu != IDU_TYPE_SLICE_USER_DATA &&
308 idu != IDU_TYPE_END_OF_SEQUENCE )
311 p_pic = block_ChainGather( p_sys->p_frame );
314 if( p_pic->i_dts > 0 )
315 p_sys->i_interpolated_dts = p_pic->i_dts;
317 /* We can interpolate dts/pts only if we have a frame rate */
318 if( p_dec->fmt_out.video.i_frame_rate != 0 && p_dec->fmt_out.video.i_frame_rate_base != 0 )
320 if( p_sys->i_interpolated_dts > 0 )
321 p_sys->i_interpolated_dts += INT64_C(1000000) *
322 p_dec->fmt_out.video.i_frame_rate_base /
323 p_dec->fmt_out.video.i_frame_rate;
325 //msg_Dbg( p_dec, "-------------- XXX0 dts=%"PRId64" pts=%"PRId64" interpolated=%"PRId64,
326 // p_pic->i_dts, p_pic->i_pts, p_sys->i_interpolated_dts );
327 if( p_pic->i_dts <= 0 )
328 p_pic->i_dts = p_sys->i_interpolated_dts;
330 if( p_pic->i_pts <= 0 )
332 if( !p_sys->sh.b_has_bframe || (p_pic->i_flags & BLOCK_FLAG_TYPE_B ) )
333 p_pic->i_pts = p_pic->i_dts;
334 /* TODO compute pts for other case */
338 //msg_Dbg( p_dec, "-------------- dts=%"PRId64" pts=%"PRId64, p_pic->i_dts, p_pic->i_pts );
341 p_sys->b_frame = false;
342 p_sys->p_frame = NULL;
343 p_sys->pp_last = &p_sys->p_frame;
349 block_t *p_frame = p_sys->p_frame;
350 if( p_frame->i_dts <= 0 && p_frame->i_pts <= 0 )
352 p_frame->i_dts = p_frag->i_dts;
353 p_frame->i_pts = p_frag->i_pts;
357 block_ChainLastAppend( &p_sys->pp_last, p_frag );
360 if( idu == IDU_TYPE_SEQUENCE_HEADER )
362 es_format_t *p_es = &p_dec->fmt_out;
366 int i_ridu = sizeof(ridu);
370 block_Release( p_sys->sh.p_sh );
371 p_sys->sh.p_sh = block_Duplicate( p_frag );
373 /* Extract the raw IDU */
374 DecodeRIDU( ridu, &i_ridu, &p_frag->p_buffer[4], p_frag->i_buffer - 4 );
376 /* Auto detect VC-1_SPMP_PESpacket_PayloadFormatHeader (SMPTE RP 227) for simple/main profile
377 * TODO find a test case and valid it */
378 if( i_ridu > 4 && (ridu[0]&0x80) == 0 ) /* for advanced profile, the first bit is 1 */
380 video_format_t *p_v = &p_dec->fmt_in.video;
381 const size_t i_potential_width = GetWBE( &ridu[0] );
382 const size_t i_potential_height = GetWBE( &ridu[2] );
384 if( i_potential_width >= 2 && i_potential_width <= 8192 &&
385 i_potential_height >= 2 && i_potential_height <= 8192 )
387 if( ( p_v->i_width <= 0 && p_v->i_height <= 0 ) ||
388 ( p_v->i_width == i_potential_width && p_v->i_height == i_potential_height ) )
390 static const uint8_t startcode[4] = { 0x00, 0x00, 0x01, IDU_TYPE_SEQUENCE_HEADER };
391 p_es->video.i_width = i_potential_width;
392 p_es->video.i_height = i_potential_height;
395 p_frag->p_buffer += 4;
396 p_frag->i_buffer -= 4;
397 memcpy( p_frag->p_buffer, startcode, sizeof(startcode) );
403 bs_init( &s, ridu, i_ridu );
404 i_profile = bs_read( &s, 2 );
407 const int i_level = bs_read( &s, 3 );
409 /* Advanced profile */
410 p_sys->sh.b_advanced_profile = true;
411 p_sys->sh.b_range_reduction = false;
412 p_sys->sh.b_has_bframe = true;
414 bs_skip( &s, 2+3+5+1 ); // chroma format + frame rate Q + bit rate Q + postprocflag
416 p_es->video.i_width = 2*bs_read( &s, 12 )+2;
417 p_es->video.i_height = 2*bs_read( &s, 12 )+2;
419 if( !p_sys->b_sequence_header )
420 msg_Dbg( p_dec, "found sequence header for advanced profile level L%d resolution %dx%d",
421 i_level, p_es->video.i_width, p_es->video.i_height);
423 bs_skip( &s, 1 );// pulldown
424 p_sys->sh.b_interlaced = bs_read( &s, 1 );
425 bs_skip( &s, 1 );// frame counter
426 p_sys->sh.b_frame_interpolation = bs_read( &s, 1 );
427 bs_skip( &s, 1 ); // Reserved
428 bs_skip( &s, 1 ); // Psf
430 if( bs_read( &s, 1 ) ) /* Display extension */
432 const int i_display_width = bs_read( &s, 14 )+1;
433 const int i_display_height = bs_read( &s, 14 )+1;
435 p_es->video.i_aspect = VOUT_ASPECT_FACTOR * i_display_width / i_display_height;
437 if( !p_sys->b_sequence_header )
438 msg_Dbg( p_dec, "display size %dx%d", i_display_width, i_display_height );
440 if( bs_read( &s, 1 ) ) /* Pixel aspect ratio (PAR/SAR) */
442 static const int p_ar[16][2] = {
443 { 0, 0}, { 1, 1}, {12,11}, {10,11}, {16,11}, {40,33},
444 {24,11}, {20,11}, {32,11}, {80,33}, {18,11}, {15,11},
445 {64,33}, {160,99},{ 0, 0}, { 0, 0}
447 int i_ar = bs_read( &s, 4 );
448 unsigned i_ar_w, i_ar_h;
452 i_ar_w = bs_read( &s, 8 );
453 i_ar_h = bs_read( &s, 8 );
457 i_ar_w = p_ar[i_ar][0];
458 i_ar_h = p_ar[i_ar][1];
460 vlc_ureduce( &i_ar_w, &i_ar_h, i_ar_w, i_ar_h, 0 );
461 if( !p_sys->b_sequence_header )
462 msg_Dbg( p_dec, "aspect ratio %d:%d", i_ar_w, i_ar_h );
465 if( bs_read( &s, 1 ) ) /* Frame rate */
469 if( bs_read( &s, 1 ) )
471 i_fps_num = bs_read( &s, 16 )+1;
476 const int i_nr = bs_read( &s, 8 );
477 const int i_dn = bs_read( &s, 4 );
481 case 1: i_fps_num = 24000; break;
482 case 2: i_fps_num = 25000; break;
483 case 3: i_fps_num = 30000; break;
484 case 4: i_fps_num = 50000; break;
485 case 5: i_fps_num = 60000; break;
486 case 6: i_fps_num = 48000; break;
487 case 7: i_fps_num = 72000; break;
491 case 1: i_fps_den = 1000; break;
492 case 2: i_fps_den = 1001; break;
495 if( i_fps_num != 0 && i_fps_den != 0 )
496 vlc_ureduce( &p_es->video.i_frame_rate, &p_es->video.i_frame_rate_base, i_fps_num, i_fps_den, 0 );
498 if( !p_sys->b_sequence_header )
499 msg_Dbg( p_dec, "frame rate %d/%d", p_es->video.i_frame_rate, p_es->video.i_frame_rate_base );
504 /* Simple and main profile */
505 p_sys->sh.b_advanced_profile = false;
506 p_sys->sh.b_interlaced = false;
508 if( !p_sys->b_sequence_header )
509 msg_Dbg( p_dec, "found sequence header for %s profile", i_profile == 0 ? "simple" : "main" );
511 bs_skip( &s, 2+3+5+1+1+ // reserved + frame rate Q + bit rate Q + loop filter + reserved
512 1+1+1+1+2+ // multiresolution + reserved + fast uv mc + extended mv + dquant
513 1+1+1+1 ); // variable size transform + reserved + overlap + sync marker
514 p_sys->sh.b_range_reduction = bs_read( &s, 1 );
515 if( bs_read( &s, 3 ) > 0 )
516 p_sys->sh.b_has_bframe = true;
518 p_sys->sh.b_has_bframe = false;
519 bs_skip( &s, 2 ); // quantizer
521 p_sys->sh.b_frame_interpolation = bs_read( &s, 1 );
523 p_sys->b_sequence_header = true;
524 BuildExtraData( p_dec );
526 else if( idu == IDU_TYPE_ENTRY_POINT )
529 block_Release( p_sys->ep.p_ep );
530 p_sys->ep.p_ep = block_Duplicate( p_frag );
532 if( !p_sys->b_entry_point )
533 msg_Dbg( p_dec, "found entry point" );
535 p_sys->b_entry_point = true;
536 BuildExtraData( p_dec );
538 else if( idu == IDU_TYPE_FRAME )
542 int i_ridu = sizeof(ridu);
544 /* Extract the raw IDU */
545 DecodeRIDU( ridu, &i_ridu, &p_frag->p_buffer[4], p_frag->i_buffer - 4 );
547 /* Parse it + interpolate pts/dts if possible */
548 bs_init( &s, ridu, i_ridu );
550 if( p_sys->sh.b_advanced_profile )
554 if( p_sys->sh.b_interlaced )
556 if( bs_read( &s, 1 ) )
558 if( bs_read( &s, 1 ) )
559 i_fcm = 1; /* interlaced field */
561 i_fcm = 2; /* interlaced frame */
565 if( i_fcm == 1 ) /*interlaced field */
567 /* XXX for mixed I/P we should check reference usage before marking them I (too much work) */
568 switch( bs_read( &s, 3 ) )
573 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
574 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
575 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
578 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P;
584 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B;
590 if( !bs_read( &s, 1 ) )
591 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P;
592 else if( !bs_read( &s, 1 ) )
593 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B;
594 else if( !bs_read( &s, 1 ) )
595 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
596 else if( !bs_read( &s, 1 ) )
597 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B; /* Bi */
599 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P; /* P Skip */
604 if( p_sys->sh.b_frame_interpolation )
605 bs_skip( &s, 1 ); // interpolate
606 bs_skip( &s, 2 ); // frame count
607 if( p_sys->sh.b_range_reduction )
608 bs_skip( &s, 1 ); // range reduction
610 if( bs_read( &s, 1 ) )
611 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P;
612 else if( !p_sys->sh.b_has_bframe || bs_read( &s, 1 ) )
613 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
615 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B;
617 p_sys->b_frame = true;