libmpeg2.c 24.7 KB
Newer Older
gbazin's avatar
 
gbazin committed
1 2 3
/*****************************************************************************
 * libmpeg2.c: mpeg2 video decoder module making use of libmpeg2.
 *****************************************************************************
4
 * Copyright (C) 1999-2001 the VideoLAN team
5
 * $Id$
gbazin's avatar
 
gbazin committed
6
 *
7
 * Authors: Gildas Bazin <gbazin@videolan.org>
gbazin's avatar
 
gbazin committed
8
 *          Christophe Massiot <massiot@via.ecp.fr>
gbazin's avatar
 
gbazin committed
9 10 11 12 13
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
Sam Hocevar's avatar
Sam Hocevar committed
14
 *
gbazin's avatar
 
gbazin committed
15 16 17 18 19 20 21
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
dionoea's avatar
dionoea committed
22
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
gbazin's avatar
 
gbazin committed
23 24 25 26 27 28 29 30 31 32 33
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <vlc/vlc.h>
#include <vlc/vout.h>
#include <vlc/decoder.h>

#include <mpeg2dec/mpeg2.h>

34 35
#include "vout_synchro.h"

gbazin's avatar
 
gbazin committed
36 37
/* Aspect ratio (ISO/IEC 13818-2 section 6.3.3, table 6-3) */
#define AR_SQUARE_PICTURE       1                           /* square pixels */
38
#define AR_4_3_PICTURE          2                        /* 4:3 picture (TV) */
gbazin's avatar
 
gbazin committed
39 40 41 42
#define AR_16_9_PICTURE         3              /* 16:9 picture (wide screen) */
#define AR_221_1_PICTURE        4                  /* 2.21:1 picture (movie) */

/*****************************************************************************
gbazin's avatar
 
gbazin committed
43
 * decoder_sys_t : libmpeg2 decoder descriptor
gbazin's avatar
 
gbazin committed
44
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
45
struct decoder_sys_t
gbazin's avatar
 
gbazin committed
46 47 48 49 50 51
{
    /*
     * libmpeg2 properties
     */
    mpeg2dec_t          *p_mpeg2dec;
    const mpeg2_info_t  *p_info;
52
    vlc_bool_t          b_skip;
gbazin's avatar
 
gbazin committed
53 54 55 56 57 58

    /*
     * Input properties
     */
    mtime_t          i_previous_pts;
    mtime_t          i_current_pts;
59 60
    mtime_t          i_previous_dts;
    mtime_t          i_current_dts;
61 62
    int              i_current_rate;
    picture_t *      p_picture_to_destroy;
63 64 65 66
    vlc_bool_t       b_garbage_pic;
    vlc_bool_t       b_after_sequence_header; /* is it the next frame after
                                               * the sequence header ?    */
    vlc_bool_t       b_slice_i;             /* intra-slice refresh stream */
gbazin's avatar
 
gbazin committed
67

Laurent Aimar's avatar
Laurent Aimar committed
68 69
    vlc_bool_t      b_preroll;

gbazin's avatar
 
gbazin committed
70 71 72
    /*
     * Output properties
     */
73
    vout_synchro_t *p_synchro;
74
    int            i_aspect;
75 76
    int            i_sar_num;
    int            i_sar_den;
77
    mtime_t        i_last_frame_pts;
gbazin's avatar
 
gbazin committed
78

gbazin's avatar
 
gbazin committed
79
};
gbazin's avatar
 
gbazin committed
80 81 82 83

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
84 85 86 87
static int  OpenDecoder( vlc_object_t * );
static void CloseDecoder( vlc_object_t * );

static picture_t *DecodeBlock( decoder_t *, block_t ** );
gbazin's avatar
 
gbazin committed
88

gbazin's avatar
 
gbazin committed
89
static picture_t *GetNewPicture( decoder_t *, uint8_t ** );
90
static void GetAR( decoder_t *p_dec );
gbazin's avatar
 
gbazin committed
91

gbazin's avatar
 
gbazin committed
92 93 94 95 96
/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
vlc_module_begin();
    set_description( _("MPEG I/II video decoder (using libmpeg2)") );
gbazin's avatar
 
gbazin committed
97
    set_capability( "decoder", 150 );
zorglub's avatar
zorglub committed
98 99
    set_category( CAT_INPUT );
    set_subcategory( SUBCAT_INPUT_VCODEC );
gbazin's avatar
 
gbazin committed
100
    set_callbacks( OpenDecoder, CloseDecoder );
gbazin's avatar
 
gbazin committed
101 102 103 104 105 106 107 108
    add_shortcut( "libmpeg2" );
vlc_module_end();

/*****************************************************************************
 * OpenDecoder: probe the decoder and return score
 *****************************************************************************/
static int OpenDecoder( vlc_object_t *p_this )
{
gbazin's avatar
 
gbazin committed
109
    decoder_t *p_dec = (decoder_t*)p_this;
gbazin's avatar
 
gbazin committed
110
    decoder_sys_t *p_sys;
Sam Hocevar's avatar
Sam Hocevar committed
111
    uint32_t i_accel = 0;
gbazin's avatar
 
gbazin committed
112

gbazin's avatar
 
gbazin committed
113 114
    if( p_dec->fmt_in.i_codec != VLC_FOURCC('m','p','g','v') &&
        p_dec->fmt_in.i_codec != VLC_FOURCC('m','p','g','1') &&
gbazin's avatar
 
gbazin committed
115
        /* Pinnacle hardware-mpeg1 */
gbazin's avatar
 
gbazin committed
116
        p_dec->fmt_in.i_codec != VLC_FOURCC('P','I','M','1') &&
gbazin's avatar
 
gbazin committed
117
        /* ATI Video */
gbazin's avatar
 
gbazin committed
118
        p_dec->fmt_in.i_codec != VLC_FOURCC('V','C','R','2') &&
119 120
        p_dec->fmt_in.i_codec != VLC_FOURCC('m','p','g','2') &&
        p_dec->fmt_in.i_codec != VLC_FOURCC('h','d','v','2') )
gbazin's avatar
 
gbazin committed
121 122 123 124
    {
        return VLC_EGENERIC;
    }

gbazin's avatar
 
gbazin committed
125
    /* Allocate the memory needed to store the decoder's structure */
gbazin's avatar
 
gbazin committed
126
    if( ( p_dec->p_sys = p_sys =
gbazin's avatar
 
gbazin committed
127
          (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
gbazin's avatar
 
gbazin committed
128
    {
gbazin's avatar
 
gbazin committed
129 130
        msg_Err( p_dec, "out of memory" );
        return VLC_EGENERIC;
gbazin's avatar
 
gbazin committed
131 132 133
    }

    /* Initialize the thread properties */
gbazin's avatar
 
gbazin committed
134 135 136 137 138 139
    memset( p_sys, 0, sizeof(decoder_sys_t) );
    p_sys->p_mpeg2dec = NULL;
    p_sys->p_synchro  = NULL;
    p_sys->p_info     = NULL;
    p_sys->i_current_pts  = 0;
    p_sys->i_previous_pts = 0;
140 141
    p_sys->i_current_dts  = 0;
    p_sys->i_previous_dts = 0;
gbazin's avatar
 
gbazin committed
142 143 144 145
    p_sys->p_picture_to_destroy = NULL;
    p_sys->b_garbage_pic = 0;
    p_sys->b_slice_i  = 0;
    p_sys->b_skip     = 0;
Laurent Aimar's avatar
Laurent Aimar committed
146
    p_sys->b_preroll = VLC_FALSE;
gbazin's avatar
 
gbazin committed
147

Christophe Massiot's avatar
Christophe Massiot committed
148
#if defined( __i386__ ) || defined( __x86_64__ )
Sam Hocevar's avatar
Sam Hocevar committed
149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178
    if( p_dec->p_libvlc->i_cpu & CPU_CAPABILITY_MMX )
    {
        i_accel |= MPEG2_ACCEL_X86_MMX;
    }

    if( p_dec->p_libvlc->i_cpu & CPU_CAPABILITY_3DNOW )
    {
        i_accel |= MPEG2_ACCEL_X86_3DNOW;
    }

    if( p_dec->p_libvlc->i_cpu & CPU_CAPABILITY_MMXEXT )
    {
        i_accel |= MPEG2_ACCEL_X86_MMXEXT;
    }

#elif defined( __powerpc__ ) || defined( SYS_DARWIN )
    if( p_dec->p_libvlc->i_cpu & CPU_CAPABILITY_ALTIVEC )
    {
        i_accel |= MPEG2_ACCEL_PPC_ALTIVEC;
    }

#else
    /* If we do not know this CPU, trust libmpeg2's feature detection */
    i_accel = MPEG2_ACCEL_DETECT;

#endif

    /* Set CPU acceleration features */
    mpeg2_accel( i_accel );

gbazin's avatar
 
gbazin committed
179
    /* Initialize decoder */
gbazin's avatar
 
gbazin committed
180 181
    p_sys->p_mpeg2dec = mpeg2_init();
    if( p_sys->p_mpeg2dec == NULL)
gbazin's avatar
 
gbazin committed
182 183
    {
        msg_Err( p_dec, "mpeg2_init() failed" );
gbazin's avatar
 
gbazin committed
184
        free( p_sys );
gbazin's avatar
 
gbazin committed
185 186
        return VLC_EGENERIC;
    }
gbazin's avatar
 
gbazin committed
187

gbazin's avatar
 
gbazin committed
188 189 190
    p_sys->p_info = mpeg2_info( p_sys->p_mpeg2dec );

    p_dec->pf_decode_video = DecodeBlock;
gbazin's avatar
 
gbazin committed
191 192 193

    return VLC_SUCCESS;
}
gbazin's avatar
 
gbazin committed
194

gbazin's avatar
 
gbazin committed
195 196 197
/*****************************************************************************
 * RunDecoder: the libmpeg2 decoder
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
198
static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
gbazin's avatar
 
gbazin committed
199 200 201 202 203
{
    decoder_sys_t   *p_sys = p_dec->p_sys;
    mpeg2_state_t   state;
    picture_t       *p_pic;

gbazin's avatar
 
gbazin committed
204 205 206 207 208
    block_t *p_block;

    if( !pp_block || !*pp_block ) return NULL;

    p_block = *pp_block;
gbazin's avatar
 
gbazin committed
209 210

    while( 1 )
gbazin's avatar
 
gbazin committed
211
    {
gbazin's avatar
 
gbazin committed
212
        state = mpeg2_parse( p_sys->p_mpeg2dec );
gbazin's avatar
 
gbazin committed
213 214 215 216

        switch( state )
        {
        case STATE_BUFFER:
gbazin's avatar
 
gbazin committed
217
            if( !p_block->i_buffer )
gbazin's avatar
 
gbazin committed
218 219
            {
                block_Release( p_block );
gbazin's avatar
 
gbazin committed
220
                return NULL;
gbazin's avatar
 
gbazin committed
221 222
            }

223 224
            if( (p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY
                                      | BLOCK_FLAG_CORRUPTED)) &&
225
                p_sys->p_synchro &&
226 227
                p_sys->p_info->sequence &&
                p_sys->p_info->sequence->width != (unsigned)-1 )
gbazin's avatar
 
gbazin committed
228 229 230 231
            {
                vout_SynchroReset( p_sys->p_synchro );
                if( p_sys->p_info->current_fbuf != NULL
                    && p_sys->p_info->current_fbuf->id != NULL )
gbazin's avatar
 
gbazin committed
232
                {
gbazin's avatar
 
gbazin committed
233 234
                    p_sys->b_garbage_pic = 1;
                    p_pic = p_sys->p_info->current_fbuf->id;
gbazin's avatar
 
gbazin committed
235
                }
gbazin's avatar
 
gbazin committed
236 237 238 239 240 241 242 243 244 245 246
                else
                {
                    uint8_t *buf[3];
                    buf[0] = buf[1] = buf[2] = NULL;
                    if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
                        break;
                    mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
                }
                p_sys->p_picture_to_destroy = p_pic;

                if ( p_sys->b_slice_i )
247
                {
gbazin's avatar
 
gbazin committed
248
                    vout_SynchroNewPicture( p_sys->p_synchro,
249 250
                        I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate,
                        p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
gbazin's avatar
 
gbazin committed
251 252
                    vout_SynchroDecode( p_sys->p_synchro );
                    vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
253
                }
gbazin's avatar
 
gbazin committed
254
            }
255

Laurent Aimar's avatar
Laurent Aimar committed
256 257 258 259 260 261 262 263 264 265 266
            if( p_block->i_flags & BLOCK_FLAG_PREROLL )
            {
                p_sys->b_preroll = VLC_TRUE;
            }
            else if( p_sys->b_preroll )
            {
                p_sys->b_preroll = VLC_FALSE;
                /* Reset synchro */
                vout_SynchroReset( p_sys->p_synchro );
            }

267
#ifdef PIC_FLAG_PTS
gbazin's avatar
 
gbazin committed
268 269 270
            if( p_block->i_pts )
            {
                mpeg2_pts( p_sys->p_mpeg2dec, (uint32_t)p_block->i_pts );
gbazin's avatar
 
gbazin committed
271 272

#else /* New interface */
273 274
            if( p_block->i_pts || p_block->i_dts )
            {
gbazin's avatar
 
gbazin committed
275
                mpeg2_tag_picture( p_sys->p_mpeg2dec,
276 277
                                   (uint32_t)p_block->i_pts,
                                   (uint32_t)p_block->i_dts );
gbazin's avatar
 
gbazin committed
278
#endif
gbazin's avatar
 
gbazin committed
279 280
                p_sys->i_previous_pts = p_sys->i_current_pts;
                p_sys->i_current_pts = p_block->i_pts;
281 282
                p_sys->i_previous_dts = p_sys->i_current_dts;
                p_sys->i_current_dts = p_block->i_dts;
gbazin's avatar
 
gbazin committed
283 284
            }

gbazin's avatar
 
gbazin committed
285
            p_sys->i_current_rate = p_block->i_rate;
gbazin's avatar
 
gbazin committed
286

gbazin's avatar
 
gbazin committed
287 288 289
            mpeg2_buffer( p_sys->p_mpeg2dec, p_block->p_buffer,
                          p_block->p_buffer + p_block->i_buffer );

290
            p_block->i_buffer = 0;
gbazin's avatar
 
gbazin committed
291 292
            break;

293
#ifdef STATE_SEQUENCE_MODIFIED
294 295 296
        case STATE_SEQUENCE_MODIFIED:
            GetAR( p_dec );
            break;
297
#endif
298

gbazin's avatar
 
gbazin committed
299
        case STATE_SEQUENCE:
gbazin's avatar
 
gbazin committed
300
        {
gbazin's avatar
 
gbazin committed
301
            /* Initialize video output */
gbazin's avatar
 
gbazin committed
302
            uint8_t *buf[3];
303
            buf[0] = buf[1] = buf[2] = NULL;
gbazin's avatar
 
gbazin committed
304

305
            GetAR( p_dec );
gbazin's avatar
 
gbazin committed
306 307

            mpeg2_custom_fbuf( p_sys->p_mpeg2dec, 1 );
gbazin's avatar
 
gbazin committed
308 309

            /* Set the first 2 reference frames */
gbazin's avatar
 
gbazin committed
310
            mpeg2_set_buf( p_sys->p_mpeg2dec, buf, NULL );
311

gbazin's avatar
 
gbazin committed
312
            if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
313 314 315 316
            {
                block_Release( p_block );
                return NULL;
            }
gbazin's avatar
 
gbazin committed
317

gbazin's avatar
 
gbazin committed
318
            mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
gbazin's avatar
 
gbazin committed
319

320
            /* This picture will never go through display_picture. */
gbazin's avatar
 
gbazin committed
321 322
            p_pic->date = 0;

323 324
            /* For some reason, libmpeg2 will put this pic twice in
             * discard_picture. This can be considered a bug in libmpeg2. */
gbazin's avatar
 
gbazin committed
325
            p_dec->pf_picture_link( p_dec, p_pic );
326

gbazin's avatar
 
gbazin committed
327
            if( p_sys->p_synchro )
328
            {
gbazin's avatar
 
gbazin committed
329
                vout_SynchroRelease( p_sys->p_synchro );
330
            }
gbazin's avatar
 
gbazin committed
331
            p_sys->p_synchro = vout_SynchroInit( p_dec,
gbazin's avatar
 
gbazin committed
332 333 334
                (uint32_t)((uint64_t)1001000000 * 27 /
                p_sys->p_info->sequence->frame_period) );
            p_sys->b_after_sequence_header = 1;
gbazin's avatar
 
gbazin committed
335 336
        }
        break;
gbazin's avatar
 
gbazin committed
337

338
        case STATE_PICTURE_2ND:
gbazin's avatar
 
gbazin committed
339 340 341
            vout_SynchroNewPicture( p_sys->p_synchro,
                p_sys->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
                p_sys->p_info->current_picture->nb_fields,
342 343
                0, 0, p_sys->i_current_rate,
                p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
344

gbazin's avatar
 
gbazin committed
345
            if( p_sys->b_skip )
346
            {
gbazin's avatar
 
gbazin committed
347
                vout_SynchroTrash( p_sys->p_synchro );
348 349 350
            }
            else
            {
gbazin's avatar
 
gbazin committed
351
                vout_SynchroDecode( p_sys->p_synchro );
352 353 354
            }
            break;

gbazin's avatar
 
gbazin committed
355 356 357
        case STATE_PICTURE:
        {
            uint8_t *buf[3];
358
            mtime_t i_pts, i_dts;
359 360
            buf[0] = buf[1] = buf[2] = NULL;

gbazin's avatar
 
gbazin committed
361 362 363
            if ( p_sys->b_after_sequence_header &&
                 ((p_sys->p_info->current_picture->flags &
                       PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_P) )
364 365
            {
                /* Intra-slice refresh. Simulate a blank I picture. */
gbazin's avatar
 
gbazin committed
366 367
                msg_Dbg( p_dec, "intra-slice refresh stream" );
                vout_SynchroNewPicture( p_sys->p_synchro,
368 369
                    I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate,
                    p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
gbazin's avatar
 
gbazin committed
370 371 372
                vout_SynchroDecode( p_sys->p_synchro );
                vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
                p_sys->b_slice_i = 1;
373
            }
gbazin's avatar
 
gbazin committed
374 375
            p_sys->b_after_sequence_header = 0;

gbazin's avatar
 
gbazin committed
376
#ifdef PIC_FLAG_PTS
gbazin's avatar
 
gbazin committed
377 378 379 380
            i_pts = p_sys->p_info->current_picture->flags & PIC_FLAG_PTS ?
                ( ( p_sys->p_info->current_picture->pts ==
                    (uint32_t)p_sys->i_current_pts ) ?
                  p_sys->i_current_pts : p_sys->i_previous_pts ) : 0;
381
            i_dts = 0;
gbazin's avatar
 
gbazin committed
382

gbazin's avatar
 
gbazin committed
383 384 385 386 387 388 389 390 391 392 393 394 395
            /* Hack to handle demuxers which only have DTS timestamps */
            if( !i_pts && !p_block->i_pts && p_block->i_dts > 0 )
            {
                if( p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY ||
                    (p_sys->p_info->current_picture->flags &
                      PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_B )
                {
                    i_pts = p_block->i_dts;
                }
            }
            p_block->i_pts = p_block->i_dts = 0;
            /* End hack */

396 397 398 399 400 401 402 403 404 405 406 407
#else /* New interface */

            i_pts = p_sys->p_info->current_picture->flags & PIC_FLAG_TAGS ?
                ( ( p_sys->p_info->current_picture->tag ==
                    (uint32_t)p_sys->i_current_pts ) ?
                  p_sys->i_current_pts : p_sys->i_previous_pts ) : 0;
            i_dts = p_sys->p_info->current_picture->flags & PIC_FLAG_TAGS ?
                ( ( p_sys->p_info->current_picture->tag2 ==
                    (uint32_t)p_sys->i_current_dts ) ?
                  p_sys->i_current_dts : p_sys->i_previous_dts ) : 0;
#endif

gbazin's avatar
 
gbazin committed
408 409
            vout_SynchroNewPicture( p_sys->p_synchro,
                p_sys->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
410
                p_sys->p_info->current_picture->nb_fields, i_pts, i_dts,
411 412
                p_sys->i_current_rate,
                p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
gbazin's avatar
 
gbazin committed
413

Laurent Aimar's avatar
Laurent Aimar committed
414
            if( !p_dec->b_pace_control && !p_sys->b_preroll &&
415
                !(p_sys->b_slice_i
gbazin's avatar
 
gbazin committed
416
                   && ((p_sys->p_info->current_picture->flags
417
                         & PIC_MASK_CODING_TYPE) == P_CODING_TYPE))
gbazin's avatar
 
gbazin committed
418 419
                   && !vout_SynchroChoose( p_sys->p_synchro,
                              p_sys->p_info->current_picture->flags
gbazin's avatar
 
gbazin committed
420
                                & PIC_MASK_CODING_TYPE,
421 422
                              /*p_sys->p_vout->render_time*/ 0 /*FIXME*/,
                              p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY ) )
423
            {
gbazin's avatar
 
gbazin committed
424 425 426 427
                mpeg2_skip( p_sys->p_mpeg2dec, 1 );
                p_sys->b_skip = 1;
                vout_SynchroTrash( p_sys->p_synchro );
                mpeg2_set_buf( p_sys->p_mpeg2dec, buf, NULL );
428 429
            }
            else
gbazin's avatar
 
gbazin committed
430
            {
gbazin's avatar
 
gbazin committed
431 432 433
                mpeg2_skip( p_sys->p_mpeg2dec, 0 );
                p_sys->b_skip = 0;
                vout_SynchroDecode( p_sys->p_synchro );
gbazin's avatar
 
gbazin committed
434 435

                if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
436 437 438 439
                {
                    block_Release( p_block );
                    return NULL;
                }
gbazin's avatar
 
gbazin committed
440

gbazin's avatar
 
gbazin committed
441
                mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
gbazin's avatar
 
gbazin committed
442 443
            }
        }
444
        break;
gbazin's avatar
 
gbazin committed
445 446

        case STATE_END:
447
        case STATE_SLICE:
gbazin's avatar
 
gbazin committed
448
            p_pic = NULL;
gbazin's avatar
 
gbazin committed
449 450
            if( p_sys->p_info->display_fbuf
                && p_sys->p_info->display_fbuf->id )
gbazin's avatar
 
gbazin committed
451
            {
gbazin's avatar
 
gbazin committed
452
                p_pic = (picture_t *)p_sys->p_info->display_fbuf->id;
gbazin's avatar
 
gbazin committed
453

gbazin's avatar
 
gbazin committed
454 455
                vout_SynchroEnd( p_sys->p_synchro,
                            p_sys->p_info->display_picture->flags
456
                             & PIC_MASK_CODING_TYPE,
gbazin's avatar
 
gbazin committed
457 458
                            p_sys->b_garbage_pic );
                p_sys->b_garbage_pic = 0;
459

gbazin's avatar
 
gbazin committed
460
                if ( p_sys->p_picture_to_destroy != p_pic )
461
                {
gbazin's avatar
 
gbazin committed
462
                    p_pic->date = vout_SynchroDate( p_sys->p_synchro );
463 464 465
                }
                else
                {
gbazin's avatar
 
gbazin committed
466
                    p_sys->p_picture_to_destroy = NULL;
gbazin's avatar
 
gbazin committed
467
                    p_pic->date = 0;
gbazin's avatar
 
gbazin committed
468
                }
469 470
            }

gbazin's avatar
 
gbazin committed
471 472
            if( p_sys->p_info->discard_fbuf &&
                p_sys->p_info->discard_fbuf->id )
473
            {
gbazin's avatar
 
gbazin committed
474 475
                p_dec->pf_picture_unlink( p_dec,
                                          p_sys->p_info->discard_fbuf->id );
gbazin's avatar
 
gbazin committed
476
            }
gbazin's avatar
 
gbazin committed
477

478 479 480 481 482 483 484 485 486 487 488 489
            /* For still frames */
            if( state == STATE_END && p_pic ) p_pic->b_force = VLC_TRUE;

            if( p_pic )
            {
                /* Avoid frames with identical timestamps.
                 * Especially needed for still frames in DVD menus. */
                if( p_sys->i_last_frame_pts == p_pic->date ) p_pic->date++;
                p_sys->i_last_frame_pts = p_pic->date;

                return p_pic;
            }
gbazin's avatar
 
gbazin committed
490

gbazin's avatar
 
gbazin committed
491 492
            break;

493
        case STATE_INVALID:
494 495 496 497
        {
            uint8_t *buf[3];
            buf[0] = buf[1] = buf[2] = NULL;

gbazin's avatar
 
gbazin committed
498
            msg_Warn( p_dec, "invalid picture encountered" );
Sam Hocevar's avatar
Sam Hocevar committed
499
            if ( ( p_sys->p_info->current_picture == NULL ) ||
gbazin's avatar
 
gbazin committed
500
               ( ( p_sys->p_info->current_picture->flags &
501
                   PIC_MASK_CODING_TYPE) != B_CODING_TYPE ) )
502
            {
503
                if( p_sys->p_synchro ) vout_SynchroReset( p_sys->p_synchro );
504
            }
gbazin's avatar
 
gbazin committed
505 506
            mpeg2_skip( p_sys->p_mpeg2dec, 1 );
            p_sys->b_skip = 1;
507

gbazin's avatar
 
gbazin committed
508 509
            if( p_sys->p_info->current_fbuf &&
                p_sys->p_info->current_fbuf->id )
510
            {
gbazin's avatar
 
gbazin committed
511 512
                p_sys->b_garbage_pic = 1;
                p_pic = p_sys->p_info->current_fbuf->id;
513
            }
514 515 516 517
            else if( !p_sys->p_info->sequence )
            {
                break;
            }
518 519 520 521
            else
            {
                if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
                    break;
gbazin's avatar
 
gbazin committed
522
                mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
523
            }
gbazin's avatar
 
gbazin committed
524
            p_sys->p_picture_to_destroy = p_pic;
525 526

            memset( p_pic->p[0].p_pixels, 0,
gbazin's avatar
 
gbazin committed
527 528
                    p_sys->p_info->sequence->width
                     * p_sys->p_info->sequence->height );
529
            memset( p_pic->p[1].p_pixels, 0x80,
gbazin's avatar
 
gbazin committed
530 531
                    p_sys->p_info->sequence->width
                     * p_sys->p_info->sequence->height / 4 );
532
            memset( p_pic->p[2].p_pixels, 0x80,
gbazin's avatar
 
gbazin committed
533 534
                    p_sys->p_info->sequence->width
                     * p_sys->p_info->sequence->height / 4 );
535

gbazin's avatar
 
gbazin committed
536
            if( p_sys->b_slice_i )
537
            {
gbazin's avatar
 
gbazin committed
538
                vout_SynchroNewPicture( p_sys->p_synchro,
539 540
                        I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate,
                        p_sys->p_info->sequence->flags & SEQ_FLAG_LOW_DELAY );
gbazin's avatar
 
gbazin committed
541 542
                vout_SynchroDecode( p_sys->p_synchro );
                vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
543
            }
544
            break;
545
        }
546

gbazin's avatar
 
gbazin committed
547 548 549 550 551
        default:
            break;
        }
    }

gbazin's avatar
 
gbazin committed
552 553
    /* Never reached */
    return NULL;
gbazin's avatar
 
gbazin committed
554 555 556
}

/*****************************************************************************
gbazin's avatar
 
gbazin committed
557
 * CloseDecoder: libmpeg2 decoder destruction
gbazin's avatar
 
gbazin committed
558
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
559
static void CloseDecoder( vlc_object_t *p_this )
gbazin's avatar
 
gbazin committed
560
{
gbazin's avatar
 
gbazin committed
561
    decoder_t *p_dec = (decoder_t *)p_this;
gbazin's avatar
 
gbazin committed
562 563
    decoder_sys_t *p_sys = p_dec->p_sys;

gbazin's avatar
 
gbazin committed
564
    if( p_sys->p_synchro ) vout_SynchroRelease( p_sys->p_synchro );
gbazin's avatar
 
gbazin committed
565

gbazin's avatar
 
gbazin committed
566
    if( p_sys->p_mpeg2dec ) mpeg2_close( p_sys->p_mpeg2dec );
gbazin's avatar
 
gbazin committed
567

gbazin's avatar
 
gbazin committed
568
    free( p_sys );
gbazin's avatar
 
gbazin committed
569
}
gbazin's avatar
 
gbazin committed
570 571 572 573

/*****************************************************************************
 * GetNewPicture: Get a new picture from the vout and set the buf struct
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
574
static picture_t *GetNewPicture( decoder_t *p_dec, uint8_t **pp_buf )
gbazin's avatar
 
gbazin committed
575
{
gbazin's avatar
 
gbazin committed
576
    decoder_sys_t *p_sys = p_dec->p_sys;
gbazin's avatar
 
gbazin committed
577
    picture_t *p_pic;
gbazin's avatar
 
gbazin committed
578

gbazin's avatar
 
gbazin committed
579
    p_dec->fmt_out.video.i_width = p_sys->p_info->sequence->width;
580 581
    p_dec->fmt_out.video.i_visible_width =
        p_sys->p_info->sequence->picture_width;
gbazin's avatar
 
gbazin committed
582
    p_dec->fmt_out.video.i_height = p_sys->p_info->sequence->height;
583 584
    p_dec->fmt_out.video.i_visible_height =
        p_sys->p_info->sequence->picture_height;
gbazin's avatar
 
gbazin committed
585
    p_dec->fmt_out.video.i_aspect = p_sys->i_aspect;
586 587
    p_dec->fmt_out.video.i_sar_num = p_sys->i_sar_num;
    p_dec->fmt_out.video.i_sar_den = p_sys->i_sar_den;
gbazin's avatar
 
gbazin committed
588

589 590 591 592 593 594 595 596
    if( p_sys->p_info->sequence->frame_period > 0 )
    {
        p_dec->fmt_out.video.i_frame_rate =
            (uint32_t)( (uint64_t)1001000000 * 27 /
                        p_sys->p_info->sequence->frame_period );
        p_dec->fmt_out.video.i_frame_rate_base = 1001;
    }

gbazin's avatar
 
gbazin committed
597 598 599 600
    p_dec->fmt_out.i_codec =
        ( p_sys->p_info->sequence->chroma_height <
          p_sys->p_info->sequence->height ) ?
        VLC_FOURCC('I','4','2','0') : VLC_FOURCC('I','4','2','2');
gbazin's avatar
 
gbazin committed
601

gbazin's avatar
 
gbazin committed
602 603
    /* Get a new picture */
    p_pic = p_dec->pf_vout_buffer_new( p_dec );
gbazin's avatar
 
gbazin committed
604 605 606

    if( p_pic == NULL ) return NULL;

gbazin's avatar
 
gbazin committed
607 608 609 610 611 612 613
    p_pic->b_progressive = p_sys->p_info->current_picture != NULL ?
        p_sys->p_info->current_picture->flags & PIC_FLAG_PROGRESSIVE_FRAME : 1;
    p_pic->b_top_field_first = p_sys->p_info->current_picture != NULL ?
        p_sys->p_info->current_picture->flags & PIC_FLAG_TOP_FIELD_FIRST : 1;
    p_pic->i_nb_fields = p_sys->p_info->current_picture != NULL ?
        p_sys->p_info->current_picture->nb_fields : 2;

gbazin's avatar
 
gbazin committed
614
    p_dec->pf_picture_link( p_dec, p_pic );
gbazin's avatar
 
gbazin committed
615 616 617 618 619 620 621

    pp_buf[0] = p_pic->p[0].p_pixels;
    pp_buf[1] = p_pic->p[1].p_pixels;
    pp_buf[2] = p_pic->p[2].p_pixels;

    return p_pic;
}
622 623 624 625 626 627

/*****************************************************************************
 * GetAR: Get aspect ratio
 *****************************************************************************/
static void GetAR( decoder_t *p_dec )
{
628
    decoder_sys_t *p_sys = p_dec->p_sys;
629 630 631 632 633 634 635 636

    /* Check whether the input gave a particular aspect ratio */
    if( p_dec->fmt_in.video.i_aspect )
    {
        p_sys->i_aspect = p_dec->fmt_in.video.i_aspect;
        if( p_sys->i_aspect <= AR_221_1_PICTURE )
        switch( p_sys->i_aspect )
        {
637
        case AR_4_3_PICTURE:
638
            p_sys->i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
639 640
            p_sys->i_sar_num = p_sys->p_info->sequence->picture_height * 4;
            p_sys->i_sar_den = p_sys->p_info->sequence->picture_width * 3;
641 642 643
            break;
        case AR_16_9_PICTURE:
            p_sys->i_aspect = VOUT_ASPECT_FACTOR * 16 / 9;
644 645
            p_sys->i_sar_num = p_sys->p_info->sequence->picture_height * 16;
            p_sys->i_sar_den = p_sys->p_info->sequence->picture_width * 9;
646 647 648
            break;
        case AR_221_1_PICTURE:
            p_sys->i_aspect = VOUT_ASPECT_FACTOR * 221 / 100;
649 650
            p_sys->i_sar_num = p_sys->p_info->sequence->picture_height * 221;
            p_sys->i_sar_den = p_sys->p_info->sequence->picture_width * 100;
651 652 653
            break;
        case AR_SQUARE_PICTURE:
            p_sys->i_aspect = VOUT_ASPECT_FACTOR *
654 655
                           p_sys->p_info->sequence->picture_width /
                           p_sys->p_info->sequence->picture_height;
656
            p_sys->i_sar_num = p_sys->i_sar_den = 1;
657 658 659 660 661 662 663 664 665
            break;
        }
    }
    else
    {
        /* Use the value provided in the MPEG sequence header */
        if( p_sys->p_info->sequence->pixel_height > 0 )
        {
            p_sys->i_aspect =
666
                ((uint64_t)p_sys->p_info->sequence->picture_width) *
667 668
                p_sys->p_info->sequence->pixel_width *
                VOUT_ASPECT_FACTOR /
669
                p_sys->p_info->sequence->picture_height /
670
                p_sys->p_info->sequence->pixel_height;
671 672
            p_sys->i_sar_num = p_sys->p_info->sequence->pixel_width;
            p_sys->i_sar_den = p_sys->p_info->sequence->pixel_height;
673 674 675 676 677 678 679
        }
        else
        {
            /* Invalid aspect, assume 4:3.
             * This shouldn't happen and if it does it is a bug
             * in libmpeg2 (likely triggered by an invalid stream) */
            p_sys->i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
680 681
            p_sys->i_sar_num = p_sys->p_info->sequence->picture_height * 4;
            p_sys->i_sar_den = p_sys->p_info->sequence->picture_width * 3;
682 683 684
        }
    }

685 686 687
    msg_Dbg( p_dec, "%dx%d (display %d,%d), aspect %d, sar %i:%i, %u.%03u fps",
             p_sys->p_info->sequence->picture_width,
             p_sys->p_info->sequence->picture_height,
688
             p_sys->p_info->sequence->display_width,
689 690
             p_sys->p_info->sequence->display_height,
             p_sys->i_aspect, p_sys->i_sar_num, p_sys->i_sar_den,
691 692 693 694 695
             (uint32_t)((uint64_t)1001000000 * 27 /
                 p_sys->p_info->sequence->frame_period / 1001),
             (uint32_t)((uint64_t)1001000000 * 27 /
                 p_sys->p_info->sequence->frame_period % 1001) );
}