1 /*****************************************************************************
2 * xxmc.c : HW MPEG decoder thread
3 *****************************************************************************
4 * Copyright (C) 2000-2001 VideoLAN
7 * Authors: Samuel Hocevar <sam@zoy.org>
8 * Laurent Aimar <fenrir@via.ecp.fr>
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_codec.h>
35 #include <vlc_codec_synchro.h>
43 //#include "attributes.h"
44 #include "mpeg2_internal.h"
45 //#include "xvmc_vld.h"
47 /* Aspect ratio (ISO/IEC 13818-2 section 6.3.3, table 6-3) */
48 #define AR_SQUARE_PICTURE 1 /* square pixels */
49 #define AR_3_4_PICTURE 2 /* 3:4 picture (TV) */
50 #define AR_16_9_PICTURE 3 /* 16:9 picture (wide screen) */
51 #define AR_221_1_PICTURE 4 /* 2.21:1 picture (movie) */
53 /*****************************************************************************
54 * decoder_sys_t : libmpeg2 decoder descriptor
55 *****************************************************************************/
61 mpeg2dec_t *p_mpeg2dec;
62 const mpeg2_info_t *p_info;
69 mtime_t i_previous_pts;
70 mtime_t i_current_pts;
71 mtime_t i_previous_dts;
72 mtime_t i_current_dts;
74 picture_t * p_picture_to_destroy;
76 bool b_after_sequence_header; /* is it the next frame after
77 * the sequence header ? */
78 bool b_slice_i; /* intra-slice refresh stream */
83 decoder_synchro_t *p_synchro;
85 mtime_t i_last_frame_pts;
88 /*****************************************************************************
90 *****************************************************************************/
92 static int OpenDecoder( vlc_object_t * );
93 static void CloseDecoder( vlc_object_t * );
95 static picture_t *DecodeBlock( decoder_t *, block_t ** );
97 static picture_t *GetNewPicture( decoder_t *, uint8_t ** );
99 /*****************************************************************************
101 *****************************************************************************/
103 set_description( N_("MPEG I/II hw video decoder (using libmpeg2)") )
104 set_capability( "decoder", 140 )
105 set_callbacks( OpenDecoder, CloseDecoder )
106 add_shortcut( "xxmc" )
109 /*****************************************************************************
110 * OpenDecoder: probe the decoder and return score
111 *****************************************************************************/
112 static int OpenDecoder( vlc_object_t *p_this )
115 decoder_t *p_dec = (decoder_t*)p_this;
116 decoder_sys_t *p_sys = NULL;
117 uint32_t i_accel = 0;
123 if( p_dec->fmt_in.i_codec != VLC_CODEC_MPGV )
125 /* Select onl recognized original format (standard mpeg video) */
126 switch( p_dec->fmt_in.i_original_fourcc )
128 case VLC_FOURCC('m','p','g','1'):
129 case VLC_FOURCC('m','p','g','2'):
130 case VLC_FOURCC('m','p','g','v'):
131 /* Pinnacle hardware-mpeg1 */
132 case VLC_FOURCC('P','I','M','1'):
133 /* VIA hardware-mpeg2 */
134 case VLC_FOURCC('X','x','M','C'):
136 case VLC_FOURCC('V','C','R','2'):
139 if( p_dec->fmt_in.i_original_fourcc )
144 msg_Dbg(p_dec, "OpenDecoder Entering");
146 /* Allocate the memory needed to store the decoder's structure */
147 p_dec->p_sys = p_sys = calloc( 1, sizeof(*p_sys) );
151 /* Initialize the thread properties */
152 p_sys->p_mpeg2dec = NULL;
153 p_sys->p_synchro = NULL;
154 p_sys->p_info = NULL;
155 p_sys->i_pts = mdate() + DEFAULT_PTS_DELAY;
156 p_sys->i_current_pts = 0;
157 p_sys->i_previous_pts = 0;
158 p_sys->i_current_dts = 0;
159 p_sys->i_previous_dts = 0;
160 p_sys->p_picture_to_destroy = NULL;
161 p_sys->b_garbage_pic = 0;
162 p_sys->b_slice_i = 0;
165 #if defined( __i386__ )
166 if( vlc_CPU() & CPU_CAPABILITY_MMX )
168 i_accel |= MPEG2_ACCEL_X86_MMX;
171 if( vlc_CPU() & CPU_CAPABILITY_3DNOW )
173 i_accel |= MPEG2_ACCEL_X86_3DNOW;
176 if( vlc_CPU() & CPU_CAPABILITY_MMXEXT )
178 i_accel |= MPEG2_ACCEL_X86_MMXEXT;
181 #elif defined( __powerpc__ ) || defined( SYS_DARWIN )
182 if( vlc_CPU() & CPU_CAPABILITY_ALTIVEC )
184 i_accel |= MPEG2_ACCEL_PPC_ALTIVEC;
188 /* If we do not know this CPU, trust libmpeg2's feature detection */
189 i_accel = MPEG2_ACCEL_DETECT;
193 /* Set CPU acceleration features */
194 mpeg2_accel( i_accel );
196 /* Initialize decoder */
197 p_sys->p_mpeg2dec = mpeg2_init();
198 if( p_sys->p_mpeg2dec == NULL)
200 msg_Err( p_dec, "mpeg2_init() failed" );
205 p_sys->p_info = mpeg2_info( p_sys->p_mpeg2dec );
207 p_dec->pf_decode_video = DecodeBlock;
208 p_dec->fmt_out.i_cat = VIDEO_ES;
209 p_dec->fmt_out.i_codec = 0;
211 f_wd_dec = fopen("/vlc/dec_pid", "w");
212 if (f_wd_dec != NULL)
214 fprintf(f_wd_dec, "%d\n", getpid());
219 msg_Dbg(p_dec, "OpenDecoder Leaving");
224 static void WriteDecodeFile(int value)
228 f_wd_ok = fopen("/vlc/dec_ok", "w");
231 fprintf(f_wd_ok, "%d", value);
238 /*****************************************************************************
239 * RunDecoder: the libmpeg2 decoder
240 *****************************************************************************/
241 static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
243 decoder_sys_t *p_sys = p_dec->p_sys;
249 if( !pp_block || !*pp_block )
255 state = mpeg2_parse( p_sys->p_mpeg2dec );
259 if( !p_block->i_buffer )
261 block_Release( p_block );
264 if( (p_block->i_flags&BLOCK_FLAG_DISCONTINUITY) &&
266 p_sys->p_info->sequence &&
267 p_sys->p_info->sequence->width != (unsigned int)-1 )
269 decoder_SynchroReset( p_sys->p_synchro );
270 if( p_sys->p_info->current_fbuf != NULL
271 && p_sys->p_info->current_fbuf->id != NULL )
273 p_sys->b_garbage_pic = 1;
274 p_pic = p_sys->p_info->current_fbuf->id;
279 buf[0] = buf[1] = buf[2] = NULL;
280 if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
282 mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
284 p_sys->p_picture_to_destroy = p_pic;
286 if ( p_sys->b_slice_i )
288 decoder_SynchroNewPicture( p_sys->p_synchro,
289 I_CODING_TYPE, 2, 0, 0,
290 p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
291 decoder_SynchroDecode( p_sys->p_synchro );
292 decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
299 mpeg2_pts( p_sys->p_mpeg2dec, (uint32_t)p_block->i_pts );
301 #else /* New interface */
302 if( p_block->i_pts || p_block->i_dts )
304 mpeg2_tag_picture( p_sys->p_mpeg2dec,
305 (uint32_t)p_block->i_pts,
306 (uint32_t)p_block->i_dts );
308 p_sys->i_previous_pts = p_sys->i_current_pts;
309 p_sys->i_current_pts = p_block->i_pts;
310 p_sys->i_previous_dts = p_sys->i_current_dts;
311 p_sys->i_current_dts = p_block->i_dts;
313 p_sys->i_current_rate = p_block->i_rate;
315 mpeg2_buffer( p_sys->p_mpeg2dec, p_block->p_buffer,
316 p_block->p_buffer + p_block->i_buffer );
317 p_block->i_buffer = 0;
322 /* Initialize video output */
324 buf[0] = buf[1] = buf[2] = NULL;
326 /* Check whether the input gave a particular aspect ratio */
327 if( p_dec->fmt_in.video.i_aspect )
329 p_sys->i_aspect = p_dec->fmt_in.video.i_aspect;
330 if( p_sys->i_aspect <= AR_221_1_PICTURE )
331 switch( p_sys->i_aspect )
334 p_sys->i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
336 case AR_16_9_PICTURE:
337 p_sys->i_aspect = VOUT_ASPECT_FACTOR * 16 / 9;
339 case AR_221_1_PICTURE:
340 p_sys->i_aspect = VOUT_ASPECT_FACTOR * 221 / 100;
342 case AR_SQUARE_PICTURE:
343 p_sys->i_aspect = VOUT_ASPECT_FACTOR *
344 p_sys->p_info->sequence->width /
345 p_sys->p_info->sequence->height;
351 /* Use the value provided in the MPEG sequence header */
352 if( p_sys->p_info->sequence->pixel_height > 0 )
355 ((uint64_t)p_sys->p_info->sequence->display_width) *
356 p_sys->p_info->sequence->pixel_width *
358 p_sys->p_info->sequence->display_height /
359 p_sys->p_info->sequence->pixel_height;
363 /* Invalid aspect, assume 4:3.
364 * This shouldn't happen and if it does it is a bug
365 * in libmpeg2 (likely triggered by an invalid stream) */
366 p_sys->i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
370 msg_Dbg( p_dec, "%dx%d, aspect %d, %u.%03u fps",
371 p_sys->p_info->sequence->width,
372 p_sys->p_info->sequence->height, p_sys->i_aspect,
373 (uint32_t)((uint64_t)1001000000 * 27 /
374 p_sys->p_info->sequence->frame_period / 1001),
375 (uint32_t)((uint64_t)1001000000 * 27 /
376 p_sys->p_info->sequence->frame_period % 1001) );
378 mpeg2_custom_fbuf( p_sys->p_mpeg2dec, 1 );
380 /* Set the first 2 reference frames */
381 mpeg2_set_buf( p_sys->p_mpeg2dec, buf, NULL );
383 if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
385 block_Release( p_block );
388 mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
391 decoder_LinkPicture( p_dec, p_pic );
393 if( p_sys->p_synchro )
395 decoder_SynchroRelease( p_sys->p_synchro );
397 p_sys->p_synchro = decoder_SynchroInit( p_dec,
398 (uint32_t)((uint64_t)1001000000 * 27 /
399 p_sys->p_info->sequence->frame_period) );
400 p_sys->b_after_sequence_header = 1;
404 case STATE_PICTURE_2ND:
405 decoder_SynchroNewPicture( p_sys->p_synchro,
406 p_sys->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
407 p_sys->p_info->current_picture->nb_fields,
409 p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
413 decoder_SynchroTrash( p_sys->p_synchro );
417 decoder_SynchroDecode( p_sys->p_synchro );
425 buf[0] = buf[1] = buf[2] = NULL;
427 if ( p_sys->b_after_sequence_header &&
428 ((p_sys->p_info->current_picture->flags &
429 PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_P) )
431 /* Intra-slice refresh. Simulate a blank I picture. */
432 msg_Dbg( p_dec, "intra-slice refresh stream" );
433 decoder_SynchroNewPicture( p_sys->p_synchro,
434 I_CODING_TYPE, 2, 0, 0,
435 p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
436 decoder_SynchroDecode( p_sys->p_synchro );
437 decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
438 p_sys->b_slice_i = 1;
440 p_sys->b_after_sequence_header = 0;
443 i_pts = p_sys->p_info->current_picture->flags & PIC_FLAG_PTS ?
444 ( ( p_sys->p_info->current_picture->pts ==
445 (uint32_t)p_sys->i_current_pts ) ?
446 p_sys->i_current_pts : p_sys->i_previous_pts ) : 0;
447 #else /* New interface */
448 i_pts = p_sys->p_info->current_picture->flags & PIC_FLAG_TAGS ?
449 ( ( p_sys->p_info->current_picture->tag ==
450 (uint32_t)p_sys->i_current_pts ) ?
451 p_sys->i_current_pts : p_sys->i_previous_pts ) : 0;
453 /* Hack to handle demuxers which only have DTS timestamps */
454 if( !i_pts && !p_block->i_pts && p_block->i_dts > 0 )
456 if( p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY ||
457 (p_sys->p_info->current_picture->flags &
458 PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_B )
460 i_pts = p_block->i_dts;
463 p_block->i_pts = p_block->i_dts = 0;
466 decoder_SynchroNewPicture( p_sys->p_synchro,
467 p_sys->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
468 p_sys->p_info->current_picture->nb_fields, i_pts,
470 p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
472 if ( !(p_sys->b_slice_i
473 && ((p_sys->p_info->current_picture->flags
474 & PIC_MASK_CODING_TYPE) == P_CODING_TYPE))
475 && !decoder_SynchroChoose( p_sys->p_synchro,
476 p_sys->p_info->current_picture->flags
477 & PIC_MASK_CODING_TYPE,
478 /*FindVout(p_dec)->render_time*/ 0 /*FIXME*/,
479 p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY ) )
481 mpeg2_skip( p_sys->p_mpeg2dec, 1 );
483 decoder_SynchroTrash( p_sys->p_synchro );
484 mpeg2_set_buf( p_sys->p_mpeg2dec, buf, NULL );
488 mpeg2_skip( p_sys->p_mpeg2dec, 0 );
490 decoder_SynchroDecode( p_sys->p_synchro );
492 if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
494 block_Release( p_block );
498 //p_sys->p_mpeg2dec->ptr_forward_ref_picture = p_sys->p_mpeg2dec->fbuf[2]->id;
499 //p_sys->p_mpeg2dec->ptr_backward_ref_picture = p_sys->p_mpeg2dec->fbuf[1]->id;
501 if ((p_sys->p_info->current_picture->flags & PIC_MASK_CODING_TYPE) != B_CODING_TYPE)
503 //if (p_sys->p_mpeg2dec->ptr_forward_ref_picture &&
504 // p_sys->p_mpeg2dec->ptr_forward_ref_picture != picture->backward_reference_frame)
505 // p_pic->forward_reference_frame->free (p_pic->forward_reference_frame);
507 //p_sys->p_mpeg2dec->ptr_forward_ref_picture =
508 // p_sys->p_mpeg2dec->ptr_backward_ref_picture;
509 //p_sys->p_mpeg2dec->ptr_backward_ref_picture = (void *)p_pic;
511 mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
519 if( p_sys->p_info->display_fbuf
520 && p_sys->p_info->display_fbuf->id )
522 p_pic = (picture_t *)p_sys->p_info->display_fbuf->id;
524 decoder_SynchroEnd( p_sys->p_synchro,
525 p_sys->p_info->display_picture->flags
526 & PIC_MASK_CODING_TYPE,
527 p_sys->b_garbage_pic );
528 p_sys->b_garbage_pic = 0;
530 if ( p_sys->p_picture_to_destroy != p_pic )
532 p_pic->date = decoder_SynchroDate( p_sys->p_synchro );
536 p_sys->p_picture_to_destroy = NULL;
541 if( p_sys->p_info->discard_fbuf &&
542 p_sys->p_info->discard_fbuf->id )
544 decoder_UnlinkPicture( p_dec, p_sys->p_info->discard_fbuf->id );
546 /* For still frames */
547 //if( state == STATE_END && p_pic ) p_pic->b_force = true;
552 /* Avoid frames with identical timestamps.
553 * Especially needed for still frames in DVD menus. */
554 if( p_sys->i_last_frame_pts == p_pic->date ) p_pic->date++;
555 p_sys->i_last_frame_pts = p_pic->date;
564 buf[0] = buf[1] = buf[2] = NULL;
566 msg_Warn( p_dec, "invalid picture encountered" );
567 if ( ( p_sys->p_info->current_picture == NULL ) ||
568 ( ( p_sys->p_info->current_picture->flags &
569 PIC_MASK_CODING_TYPE) != B_CODING_TYPE ) )
571 if( p_sys->p_synchro ) decoder_SynchroReset( p_sys->p_synchro );
573 mpeg2_skip( p_sys->p_mpeg2dec, 1 );
576 if( p_sys->p_info->current_fbuf &&
577 p_sys->p_info->current_fbuf->id )
579 p_sys->b_garbage_pic = 1;
580 p_pic = p_sys->p_info->current_fbuf->id;
582 else if( !p_sys->p_info->sequence )
588 if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
590 mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
592 p_sys->p_picture_to_destroy = p_pic;
594 memset( p_pic->p[0].p_pixels, 0,
595 p_sys->p_info->sequence->width
596 * p_sys->p_info->sequence->height );
597 memset( p_pic->p[1].p_pixels, 0x80,
598 p_sys->p_info->sequence->width
599 * p_sys->p_info->sequence->height / 4 );
600 memset( p_pic->p[2].p_pixels, 0x80,
601 p_sys->p_info->sequence->width
602 * p_sys->p_info->sequence->height / 4 );
604 if( p_sys->b_slice_i )
606 decoder_SynchroNewPicture( p_sys->p_synchro,
607 I_CODING_TYPE, 2, 0, 0,
608 p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
609 decoder_SynchroDecode( p_sys->p_synchro );
610 decoder_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
622 /*****************************************************************************
623 * CloseDecoder: libmpeg2 decoder destruction
624 *****************************************************************************/
625 static void CloseDecoder( vlc_object_t *p_this )
627 decoder_t *p_dec = (decoder_t *)p_this;
628 decoder_sys_t *p_sys = p_dec->p_sys;
631 if( p_sys->p_synchro ) decoder_SynchroRelease( p_sys->p_synchro );
632 if( p_sys->p_mpeg2dec ) mpeg2_close( p_sys->p_mpeg2dec );
634 f_wd_dec = fopen("/vlc/dec_pid", "w");
635 if (f_wd_dec != NULL)
637 fprintf(f_wd_dec, "0\n");
645 static double get_aspect_ratio( decoder_t *p_dec )
647 decoder_sys_t *p_sys = p_dec->p_sys;
649 double mpeg1_pel_ratio[16] = {1.0 /* forbidden */,
650 1.0, 0.6735, 0.7031, 0.7615, 0.8055, 0.8437, 0.8935, 0.9157,
651 0.9815, 1.0255, 1.0695, 1.0950, 1.1575, 1.2015, 1.0 /*reserved*/ };
653 if( !p_sys->p_mpeg2dec->decoder.mpeg1 )
655 /* these hardcoded values are defined on mpeg2 standard for
656 * aspect ratio. other values are reserved or forbidden. */
657 /*switch( p_sys->p_mpeg2dec->decoder.aspect_ratio_information )
670 ratio = (double)p_sys->p_mpeg2dec->decoder.width/(double)p_sys->p_mpeg2dec->decoder.height;
676 /* mpeg1 constants refer to pixel aspect ratio */
677 ratio = (double)p_sys->p_mpeg2dec->decoder.width/(double)p_sys->p_mpeg2dec->decoder.height;
678 /* ratio /= mpeg1_pel_ratio[p_sys->p_mpeg2dec->decoder.aspect_ratio_information]; */
684 /*****************************************************************************
685 * GetNewPicture: Get a new picture from the vout and set the buf struct
686 *****************************************************************************/
687 static picture_t *GetNewPicture( decoder_t *p_dec, uint8_t **pp_buf )
689 //msg_Dbg(p_dec, "GetNewPicture Entering");
690 decoder_sys_t *p_sys = p_dec->p_sys;
693 p_dec->fmt_out.video.i_width = p_sys->p_info->sequence->width;
694 p_dec->fmt_out.video.i_height = p_sys->p_info->sequence->height;
695 p_dec->fmt_out.video.i_aspect = p_sys->i_aspect;
697 if( p_sys->p_info->sequence->frame_period > 0 )
699 p_dec->fmt_out.video.i_frame_rate =
700 (uint32_t)( (uint64_t)1001000000 * 27 /
701 p_sys->p_info->sequence->frame_period );
702 p_dec->fmt_out.video.i_frame_rate_base = 1001;
705 p_dec->fmt_out.i_codec =
706 ( p_sys->p_info->sequence->chroma_height <
707 p_sys->p_info->sequence->height ) ?
708 VLC_CODEC_I420 : VLC_CODEC_I422;
711 p_sys->f_wd_nb = fopen("/vlc/dec_nb", "w");
712 if (p_sys->f_wd_nb != NULL)
714 // fprintf(p_sys->f_wd_nb, "%d\n", mdate());
715 fprintf(p_sys->f_wd_nb, "%s\n", mdate());
716 fflush(p_sys->f_wd_nb);
719 p_pic = decoder_NewPicture( p_dec );
721 if( p_pic == NULL ) return NULL;
723 p_pic->b_progressive = p_sys->p_info->current_picture != NULL ?
724 p_sys->p_info->current_picture->flags & PIC_FLAG_PROGRESSIVE_FRAME : 1;
725 p_pic->b_top_field_first = p_sys->p_info->current_picture != NULL ?
726 p_sys->p_info->current_picture->flags & PIC_FLAG_TOP_FIELD_FIRST : 1;
727 p_pic->i_nb_fields = p_sys->p_info->current_picture != NULL ?
728 p_sys->p_info->current_picture->nb_fields : 2;
729 p_pic->format.i_frame_rate = p_dec->fmt_out.video.i_frame_rate;
730 p_pic->format.i_frame_rate_base = p_dec->fmt_out.video.i_frame_rate_base;
732 decoder_LinkPicture( p_dec, p_pic );
734 pp_buf[0] = p_pic->p[0].p_pixels;
735 pp_buf[1] = p_pic->p[1].p_pixels;
736 pp_buf[2] = p_pic->p[2].p_pixels;
738 /* let driver ensure this image has the right format */
740 this->driver->update_frame_format( p_pic->p_sys->p_vout, p_pic,
741 p_dec->fmt_out.video.i_width,
742 p_dec->fmt_out.video.i_height,
743 p_dec->fmt_out.video.i_aspect,
745 mpeg2_xxmc_choose_coding( p_dec, &p_sys->p_mpeg2dec->decoder, p_pic,
746 get_aspect_ratio(p_dec), 0 );