1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001, 2002, 2006 the VideoLAN team
5 * $Id: copy.c 18231 2006-12-03 17:02:02Z courmisch $
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 *****************************************************************************/
30 #include <vlc_codec.h>
31 #include <vlc_block.h>
34 #include "vlc_block_helper.h"
36 /*****************************************************************************
38 *****************************************************************************/
39 static int Open ( vlc_object_t * );
40 static void Close( vlc_object_t * );
43 set_category( CAT_SOUT );
44 set_subcategory( SUBCAT_SOUT_PACKETIZER );
45 set_description( _("VC-1 packetizer") );
46 set_capability( "packetizer", 50 );
47 set_callbacks( Open, Close );
50 /*****************************************************************************
52 *****************************************************************************/
58 block_bytestream_t bytestream;
61 uint8_t p_startcode[3];
63 /* Current sequence header */
64 vlc_bool_t b_sequence_header;
68 vlc_bool_t b_advanced_profile;
69 vlc_bool_t b_interlaced;
70 vlc_bool_t b_frame_interpolation;
71 vlc_bool_t b_range_reduction;
72 vlc_bool_t b_has_bframe;
74 vlc_bool_t b_entry_point;
83 /* Current frame being built */
88 mtime_t i_interpolated_dts;
99 IDU_TYPE_SEQUENCE_HEADER = 0x0f,
100 IDU_TYPE_ENTRY_POINT = 0x0e,
101 IDU_TYPE_FRAME = 0x0D,
102 IDU_TYPE_FIELD = 0x0C,
103 IDU_TYPE_SLICE = 0x0B,
104 IDU_TYPE_END_OF_SEQUENCE = 0x0B,
106 IDU_TYPE_SEQUENCE_LEVEL_USER_DATA = 0x1F,
107 IDU_TYPE_ENTRY_POINT_USER_DATA = 0x1E,
108 IDU_TYPE_FRAME_USER_DATA = 0x1D,
109 IDU_TYPE_FIELD_USER_DATA = 0x1C,
110 IDU_TYPE_SLICE_USER_DATA = 0x1B,
113 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block );
115 /*****************************************************************************
116 * Open: probe the packetizer and return score
117 *****************************************************************************
118 * Tries to launch a decoder and return score so that the interface is able
120 *****************************************************************************/
121 static int Open( vlc_object_t *p_this )
123 decoder_t *p_dec = (decoder_t*)p_this;
124 decoder_sys_t *p_sys;
126 if( p_dec->fmt_in.i_codec != VLC_FOURCC( 'W', 'V', 'C', '1' ) )
129 p_dec->pf_packetize = Packetize;
131 /* Create the output format */
132 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
133 p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
135 p_sys->i_state = STATE_NOSYNC;
136 p_sys->bytestream = block_BytestreamInit( p_dec );
137 p_sys->p_startcode[0] = 0x00;
138 p_sys->p_startcode[1] = 0x00;
139 p_sys->p_startcode[2] = 0x01;
142 p_sys->b_sequence_header = VLC_FALSE;
143 p_sys->sh.p_sh = NULL;
144 p_sys->b_entry_point = VLC_FALSE;
145 p_sys->ep.p_ep = NULL;
147 p_sys->b_frame = VLC_FALSE;
148 p_sys->p_frame = NULL;
149 p_sys->pp_last = &p_sys->p_frame;
151 p_sys->i_interpolated_dts = -1;
154 if( p_dec->fmt_in.i_extra > 0 )
156 block_t *p_init = block_New( p_dec, p_dec->fmt_in.i_extra );
159 memcpy( p_init->p_buffer, p_dec->fmt_in.p_extra,
160 p_dec->fmt_in.i_extra );
162 while( ( p_pic = Packetize( p_dec, &p_init ) ) )
163 block_Release( p_pic ); /* Should not happen (only sequence header) */
169 /*****************************************************************************
171 *****************************************************************************/
172 static void Close( vlc_object_t *p_this )
174 decoder_t *p_dec = (decoder_t*)p_this;
175 decoder_sys_t *p_sys = p_dec->p_sys;
177 block_BytestreamRelease( &p_sys->bytestream );
179 block_Release( p_sys->p_frame );
183 /*****************************************************************************
184 * Packetize: packetize an access unit
185 *****************************************************************************/
186 static block_t *ParseIDU( decoder_t *p_dec, block_t *p_frag );
188 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
190 decoder_sys_t *p_sys = p_dec->p_sys;
193 if( pp_block == NULL || *pp_block == NULL )
196 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
198 if( (*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED )
200 p_sys->i_state = STATE_NOSYNC;
201 block_BytestreamFlush( &p_sys->bytestream );
204 block_ChainRelease( p_sys->p_frame );
205 p_sys->p_frame = NULL;
206 p_sys->pp_last = &p_sys->p_frame;
207 p_sys->b_frame = VLC_FALSE;
209 // p_sys->i_interpolated_dts = 0;
210 block_Release( *pp_block );
214 block_BytestreamPush( &p_sys->bytestream, *pp_block );
218 switch( p_sys->i_state )
222 if( block_FindStartcodeFromOffset( &p_sys->bytestream, &p_sys->i_offset, p_sys->p_startcode, 3 ) == VLC_SUCCESS )
223 p_sys->i_state = STATE_NEXT_SYNC;
225 if( p_sys->i_offset )
227 block_SkipBytes( &p_sys->bytestream, p_sys->i_offset );
229 block_BytestreamFlush( &p_sys->bytestream );
232 if( p_sys->i_state != STATE_NEXT_SYNC )
233 return NULL; /* Need more data */
235 p_sys->i_offset = 4; /* To find next startcode */
237 case STATE_NEXT_SYNC:
238 /* TODO: If p_block == NULL, flush the buffer without checking the
241 /* Find the next startcode */
242 if( block_FindStartcodeFromOffset( &p_sys->bytestream, &p_sys->i_offset, p_sys->p_startcode, 3 ) != VLC_SUCCESS )
243 return NULL; /* Need more data */
245 /* Get the new fragment and set the pts/dts */
246 p_pic = block_New( p_dec, p_sys->i_offset );
247 block_BytestreamFlush( &p_sys->bytestream );
248 p_pic->i_pts = p_sys->bytestream.p_block->i_pts;
249 p_pic->i_dts = p_sys->bytestream.p_block->i_dts;
250 p_pic->i_rate = p_sys->bytestream.p_block->i_rate;
252 block_GetBytes( &p_sys->bytestream, p_pic->p_buffer, p_pic->i_buffer );
256 /* Parse and return complete frame */
257 p_pic = ParseIDU( p_dec, p_pic );
259 /* Don't reuse the same timestamps several times */
260 if( p_sys->p_frame &&
261 p_sys->p_frame->i_dts == p_sys->bytestream.p_block->i_dts &&
262 p_sys->p_frame->i_pts == p_sys->bytestream.p_block->i_pts )
264 p_sys->bytestream.p_block->i_pts = -1;
265 p_sys->bytestream.p_block->i_dts = -1;
271 p_sys->i_state = STATE_NOSYNC;
275 if( p_sys->i_interpolated_dts < 0 )
277 msg_Dbg( p_dec, "need a starting pts/dts" );
278 p_sys->i_state = STATE_NOSYNC;
279 block_Release( p_pic );
283 /* So p_block doesn't get re-added several times */
284 *pp_block = block_BytestreamPop( &p_sys->bytestream );
286 p_sys->i_state = STATE_NOSYNC;
293 /* DecodeRIDU: decode the startcode emulation prevention (same than h264) */
294 static void DecodeRIDU( uint8_t *p_ret, int *pi_ret, uint8_t *src, int i_src )
296 uint8_t *end = &src[i_src];
297 uint8_t *dst_end = &p_ret[*pi_ret];
298 uint8_t *dst = p_ret;
300 while( src < end && dst < dst_end )
302 if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
314 *pi_ret = dst - p_ret;
316 /* BuildExtraData: gather sequence header and entry point */
317 static void BuildExtraData( decoder_t *p_dec )
319 decoder_sys_t *p_sys = p_dec->p_sys;
320 es_format_t *p_es = &p_dec->fmt_out;
322 if( !p_sys->b_sequence_header || !p_sys->b_entry_point )
325 i_extra = p_sys->sh.p_sh->i_buffer + p_sys->ep.p_ep->i_buffer;
326 if( p_es->i_extra != i_extra )
328 p_es->i_extra = i_extra;
329 p_es->p_extra = realloc( p_dec->fmt_out.p_extra, p_es->i_extra );
331 memcpy( p_es->p_extra,
332 p_sys->sh.p_sh->p_buffer, p_sys->sh.p_sh->i_buffer );
333 memcpy( (uint8_t*)p_es->p_extra + p_sys->sh.p_sh->i_buffer,
334 p_sys->ep.p_ep->p_buffer, p_sys->ep.p_ep->i_buffer );
336 /* ParseIDU: parse an Independant Decoding Unit */
337 static block_t *ParseIDU( decoder_t *p_dec, block_t *p_frag )
339 decoder_sys_t *p_sys = p_dec->p_sys;
341 const idu_type_t idu = p_frag->p_buffer[3];
343 if( !p_sys->b_sequence_header && idu != IDU_TYPE_SEQUENCE_HEADER )
345 msg_Warn( p_dec, "waiting for sequence header" );
346 block_Release( p_frag );
349 if( p_sys->b_sequence_header && !p_sys->b_entry_point && idu != IDU_TYPE_ENTRY_POINT )
351 msg_Warn( p_dec, "waiting for entry point" );
352 block_Release( p_frag );
355 /* TODO we do not gather ENTRY_POINT and SEQUENCE_DATA user data
356 * But It should not be a problem for decoder */
358 /* Do we have completed a frame */
360 if( p_sys->b_frame &&
361 idu != IDU_TYPE_FRAME_USER_DATA &&
362 idu != IDU_TYPE_FIELD && idu != IDU_TYPE_FIELD_USER_DATA &&
363 idu != IDU_TYPE_SLICE && idu != IDU_TYPE_SLICE_USER_DATA &&
364 idu != IDU_TYPE_END_OF_SEQUENCE )
367 p_pic = block_ChainGather( p_sys->p_frame );
369 /* We can interpolate dts/pts only if we have a frame rate */
370 if( p_dec->fmt_out.video.i_frame_rate != 0 && p_dec->fmt_out.video.i_frame_rate_base != 0 )
372 //msg_Dbg( p_dec, "-------------- XXX0 dts="I64Fd" pts="I64Fd" interpolated="I64Fd, p_pic->i_dts, p_pic->i_pts, p_sys->i_interpolated_dts );
373 if( p_pic->i_dts <= 0 )
374 p_pic->i_dts = p_sys->i_interpolated_dts;
376 p_sys->i_interpolated_dts += I64C(1000000) * p_dec->fmt_out.video.i_frame_rate_base / p_dec->fmt_out.video.i_frame_rate;
377 if( p_pic->i_pts <= 0 )
379 if( !p_sys->sh.b_has_bframe || (p_pic->i_flags & BLOCK_FLAG_TYPE_B ) )
380 p_pic->i_pts = p_pic->i_dts;
381 /* TODO compute pts for other case */
384 p_sys->i_interpolated_dts = p_pic->i_dts;
386 //msg_Dbg( p_dec, "-------------- dts="I64Fd" pts="I64Fd, p_pic->i_dts, p_pic->i_pts );
389 p_sys->p_frame = NULL;
390 p_sys->pp_last = &p_sys->p_frame;
396 block_t *p_frame = p_sys->p_frame;
397 if( p_frame->i_dts < 0 )
398 p_frame->i_dts = p_frag->i_dts;
399 if( p_frame->i_pts < 0 )
400 p_frame->i_pts = p_frag->i_pts;
402 block_ChainLastAppend( &p_sys->pp_last, p_frag );
405 if( idu == IDU_TYPE_SEQUENCE_HEADER )
407 es_format_t *p_es = &p_dec->fmt_out;
411 int i_ridu = sizeof(ridu);
415 block_Release( p_sys->sh.p_sh );
416 p_sys->sh.p_sh = block_Duplicate( p_frag );
418 /* Extract the raw IDU */
419 DecodeRIDU( ridu, &i_ridu, &p_frag->p_buffer[4], p_frag->i_buffer - 4 );
421 /* Auto detect VC-1_SPMP_PESpacket_PayloadFormatHeader (SMPTE RP 227) for simple/main profile
422 * TODO find a test case and valid it */
423 if( i_ridu > 4 && (ridu[0]&0x80) == 0 ) /* for advanced profile, the first bit is 1 */
425 video_format_t *p_v = &p_dec->fmt_in.video;
426 const int i_potential_width = GetWBE( &ridu[0] );
427 const int i_potential_height = GetWBE( &ridu[2] );
429 if( i_potential_width >= 2 && i_potential_width <= 8192 &&
430 i_potential_height >= 2 && i_potential_height <= 8192 )
432 if( ( p_v->i_width <= 0 && p_v->i_height <= 0 ) ||
433 ( p_v->i_width == i_potential_width && p_v->i_height == i_potential_height ) )
435 static const uint8_t startcode[4] = { 0x00, 0x00, 0x01, IDU_TYPE_SEQUENCE_HEADER };
436 p_es->video.i_width = i_potential_width;
437 p_es->video.i_height = i_potential_height;
440 p_frag->p_buffer += 4;
441 p_frag->i_buffer -= 4;
442 memcpy( p_frag->p_buffer, startcode, sizeof(startcode) );
448 bs_init( &s, ridu, i_ridu );
449 i_profile = bs_read( &s, 2 );
452 const int i_level = bs_read( &s, 3 );
454 /* Advanced profile */
455 p_sys->sh.b_advanced_profile = VLC_TRUE;
456 p_sys->sh.b_range_reduction = VLC_FALSE;
457 p_sys->sh.b_has_bframe = VLC_TRUE;
459 bs_skip( &s, 2+3+5+1 ); // chroma format + frame rate Q + bit rate Q + postprocflag
461 p_es->video.i_width = 2*bs_read( &s, 12 )+2;
462 p_es->video.i_height = 2*bs_read( &s, 12 )+2;
464 if( !p_sys->b_sequence_header )
465 msg_Dbg( p_dec, "found sequence header for advanced profile level L%d resolution %dx%d",
466 i_level, p_es->video.i_width, p_es->video.i_height);
468 bs_skip( &s, 1 );// pulldown
469 p_sys->sh.b_interlaced = bs_read( &s, 1 );
470 bs_skip( &s, 1 );// frame counter
471 p_sys->sh.b_frame_interpolation = bs_read( &s, 1 );
472 bs_skip( &s, 1 ); // Reserved
473 bs_skip( &s, 1 ); // Psf
475 if( bs_read( &s, 1 ) ) /* Display extension */
477 const int i_display_width = bs_read( &s, 14 )+1;
478 const int i_display_height = bs_read( &s, 14 )+1;
480 p_es->video.i_aspect = VOUT_ASPECT_FACTOR * i_display_width / i_display_height;
482 if( !p_sys->b_sequence_header )
483 msg_Dbg( p_dec, "display size %dx%d", i_display_width, i_display_height );
485 if( bs_read( &s, 1 ) ) /* Pixel aspect ratio (PAR/SAR) */
487 static const int p_ar[16][2] = {
488 { 0, 0}, { 1, 1}, {12,11}, {10,11}, {16,11}, {40,33},
489 {24,11}, {20,11}, {32,11}, {80,33}, {18,11}, {15,11},
490 {64,33}, {160,99},{ 0, 0}, { 0, 0}
492 int i_ar = bs_read( &s, 4 );
497 i_ar_w = bs_read( &s, 8 );
498 i_ar_h = bs_read( &s, 8 );
502 i_ar_w = p_ar[i_ar][0];
503 i_ar_h = p_ar[i_ar][1];
505 vlc_ureduce( &i_ar_w, &i_ar_h, i_ar_w, i_ar_h, 0 );
506 if( !p_sys->b_sequence_header )
507 msg_Dbg( p_dec, "aspect ratio %d:%d", i_ar_w, i_ar_h );
510 if( bs_read( &s, 1 ) ) /* Frame rate */
514 if( bs_read( &s, 1 ) )
516 i_fps_num = bs_read( &s, 16 )+1;
521 const int i_nr = bs_read( &s, 8 );
522 const int i_dn = bs_read( &s, 4 );
526 case 1: i_fps_num = 24000; break;
527 case 2: i_fps_num = 25000; break;
528 case 3: i_fps_num = 30000; break;
529 case 4: i_fps_num = 50000; break;
530 case 5: i_fps_num = 60000; break;
531 case 6: i_fps_num = 48000; break;
532 case 7: i_fps_num = 72000; break;
536 case 1: i_fps_den = 1000; break;
537 case 2: i_fps_den = 1001; break;
540 if( i_fps_num != 0 && i_fps_den != 0 )
541 vlc_ureduce( &p_es->video.i_frame_rate, &p_es->video.i_frame_rate_base, i_fps_num, i_fps_den, 0 );
543 if( !p_sys->b_sequence_header )
544 msg_Dbg( p_dec, "frame rate %d/%d", p_es->video.i_frame_rate, p_es->video.i_frame_rate_base );
549 /* Simple and main profile */
550 p_sys->sh.b_advanced_profile = VLC_FALSE;
551 p_sys->sh.b_interlaced = VLC_FALSE;
553 if( !p_sys->b_sequence_header )
554 msg_Dbg( p_dec, "found sequence header for %s profile", i_profile == 0 ? "simple" : "main" );
556 bs_skip( &s, 2+3+5+1+1+ // reserved + frame rate Q + bit rate Q + loop filter + reserved
557 1+1+1+1+2+ // multiresolution + reserved + fast uv mc + extended mv + dquant
558 1+1+1+1 ); // variable size transform + reserved + overlap + sync marker
559 p_sys->sh.b_range_reduction = bs_read( &s, 1 );
560 if( bs_read( &s, 3 ) > 0 )
561 p_sys->sh.b_has_bframe = VLC_TRUE;
563 p_sys->sh.b_has_bframe = VLC_FALSE;
564 bs_skip( &s, 2 ); // quantizer
566 p_sys->sh.b_frame_interpolation = bs_read( &s, 1 );
568 p_sys->b_sequence_header = VLC_TRUE;
569 BuildExtraData( p_dec );
571 else if( idu == IDU_TYPE_ENTRY_POINT )
574 block_Release( p_sys->ep.p_ep );
575 p_sys->ep.p_ep = block_Duplicate( p_frag );
577 p_sys->b_entry_point = VLC_TRUE;
578 BuildExtraData( p_dec );
580 else if( idu == IDU_TYPE_FRAME )
584 int i_ridu = sizeof(ridu);
586 /* Extract the raw IDU */
587 DecodeRIDU( ridu, &i_ridu, &p_frag->p_buffer[4], p_frag->i_buffer - 4 );
589 /* Parse it + interpolate pts/dts if possible */
590 bs_init( &s, ridu, i_ridu );
592 if( p_sys->sh.b_advanced_profile )
596 if( p_sys->sh.b_interlaced )
598 if( bs_read( &s, 1 ) )
600 if( bs_read( &s, 1 ) )
601 i_fcm = 1; /* interlaced field */
603 i_fcm = 2; /* interlaced frame */
607 if( i_fcm == 1 ) /*interlaced field */
609 /* XXX for mixed I/P we should check reference usage before marking them I (too much work) */
610 switch( bs_read( &s, 3 ) )
615 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
616 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
617 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
620 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P;
626 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B;
632 if( !bs_read( &s, 1 ) )
633 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P;
634 else if( !bs_read( &s, 1 ) )
635 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B;
636 else if( !bs_read( &s, 1 ) )
637 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
638 else if( !bs_read( &s, 1 ) )
639 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B; /* Bi */
641 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P; /* P Skip */
646 if( p_sys->sh.b_frame_interpolation )
647 bs_skip( &s, 1 ); // interpolate
648 bs_skip( &s, 2 ); // frame count
649 if( p_sys->sh.b_range_reduction )
650 bs_skip( &s, 1 ); // range reduction
652 if( bs_read( &s, 1 ) )
653 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P;
654 else if( !p_sys->sh.b_has_bframe || bs_read( &s, 1 ) )
655 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
657 p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B;
659 p_sys->b_frame = VLC_TRUE;