libmpeg2.c 20.5 KB
Newer Older
gbazin's avatar
 
gbazin committed
1 2 3 4
/*****************************************************************************
 * libmpeg2.c: mpeg2 video decoder module making use of libmpeg2.
 *****************************************************************************
 * Copyright (C) 1999-2001 VideoLAN
Sam Hocevar's avatar
Sam Hocevar committed
5
 * $Id: libmpeg2.c,v 1.42 2004/01/16 09:39:57 sam Exp $
gbazin's avatar
 
gbazin committed
6 7
 *
 * Authors: Gildas Bazin <gbazin@netcourrier.com>
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 22 23 24 25 26 27 28 29 30 31 32 33
 * 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
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * 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 38 39 40 41 42
/* Aspect ratio (ISO/IEC 13818-2 section 6.3.3, table 6-3) */
#define AR_SQUARE_PICTURE       1                           /* square pixels */
#define AR_3_4_PICTURE          2                        /* 3:4 picture (TV) */
#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 59 60

    /*
     * Input properties
     */
    pes_packet_t     *p_pes;                  /* current PES we are decoding */
    mtime_t          i_pts;
    mtime_t          i_previous_pts;
    mtime_t          i_current_pts;
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 68 69 70

    /*
     * Output properties
     */
71
    vout_synchro_t *p_synchro;
gbazin's avatar
 
gbazin committed
72
    int i_aspect;
gbazin's avatar
 
gbazin committed
73

gbazin's avatar
 
gbazin committed
74
};
gbazin's avatar
 
gbazin committed
75 76 77 78

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
79 80 81 82
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
83

gbazin's avatar
 
gbazin committed
84
static picture_t *GetNewPicture( decoder_t *, uint8_t ** );
gbazin's avatar
 
gbazin committed
85

gbazin's avatar
 
gbazin committed
86 87 88 89 90
/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
vlc_module_begin();
    set_description( _("MPEG I/II video decoder (using libmpeg2)") );
gbazin's avatar
 
gbazin committed
91
    set_capability( "decoder", 150 );
gbazin's avatar
 
gbazin committed
92
    set_callbacks( OpenDecoder, CloseDecoder );
gbazin's avatar
 
gbazin committed
93 94 95 96 97 98 99 100
    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
101
    decoder_t *p_dec = (decoder_t*)p_this;
gbazin's avatar
 
gbazin committed
102
    decoder_sys_t *p_sys;
Sam Hocevar's avatar
Sam Hocevar committed
103
    uint32_t i_accel = 0;
gbazin's avatar
 
gbazin committed
104

gbazin's avatar
 
gbazin committed
105 106
    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
107
        /* Pinnacle hardware-mpeg1 */
gbazin's avatar
 
gbazin committed
108
        p_dec->fmt_in.i_codec != VLC_FOURCC('P','I','M','1') &&
gbazin's avatar
 
gbazin committed
109
        /* ATI Video */
gbazin's avatar
 
gbazin committed
110 111
        p_dec->fmt_in.i_codec != VLC_FOURCC('V','C','R','2') &&
        p_dec->fmt_in.i_codec != VLC_FOURCC('m','p','g','2') )
gbazin's avatar
 
gbazin committed
112 113 114 115
    {
        return VLC_EGENERIC;
    }

gbazin's avatar
 
gbazin committed
116
    /* Allocate the memory needed to store the decoder's structure */
gbazin's avatar
 
gbazin committed
117
    if( ( p_dec->p_sys = p_sys =
gbazin's avatar
 
gbazin committed
118
          (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
gbazin's avatar
 
gbazin committed
119
    {
gbazin's avatar
 
gbazin committed
120 121
        msg_Err( p_dec, "out of memory" );
        return VLC_EGENERIC;
gbazin's avatar
 
gbazin committed
122 123 124
    }

    /* Initialize the thread properties */
gbazin's avatar
 
gbazin committed
125 126 127 128 129 130 131 132 133 134 135 136
    memset( p_sys, 0, sizeof(decoder_sys_t) );
    p_sys->p_pes      = NULL;
    p_sys->p_mpeg2dec = NULL;
    p_sys->p_synchro  = NULL;
    p_sys->p_info     = NULL;
    p_sys->i_pts      = mdate() + DEFAULT_PTS_DELAY;
    p_sys->i_current_pts  = 0;
    p_sys->i_previous_pts = 0;
    p_sys->p_picture_to_destroy = NULL;
    p_sys->b_garbage_pic = 0;
    p_sys->b_slice_i  = 0;
    p_sys->b_skip     = 0;
gbazin's avatar
 
gbazin committed
137

Sam Hocevar's avatar
Sam Hocevar committed
138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168
#if defined( __i386__ )
    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
169
    /* Initialize decoder */
gbazin's avatar
 
gbazin committed
170 171
    p_sys->p_mpeg2dec = mpeg2_init();
    if( p_sys->p_mpeg2dec == NULL)
gbazin's avatar
 
gbazin committed
172 173
    {
        msg_Err( p_dec, "mpeg2_init() failed" );
gbazin's avatar
 
gbazin committed
174
        free( p_sys );
gbazin's avatar
 
gbazin committed
175 176
        return VLC_EGENERIC;
    }
gbazin's avatar
 
gbazin committed
177

gbazin's avatar
 
gbazin committed
178 179 180
    p_sys->p_info = mpeg2_info( p_sys->p_mpeg2dec );

    p_dec->pf_decode_video = DecodeBlock;
gbazin's avatar
 
gbazin committed
181 182 183

    return VLC_SUCCESS;
}
gbazin's avatar
 
gbazin committed
184

gbazin's avatar
 
gbazin committed
185 186 187
/*****************************************************************************
 * RunDecoder: the libmpeg2 decoder
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
188
static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
gbazin's avatar
 
gbazin committed
189 190 191 192 193
{
    decoder_sys_t   *p_sys = p_dec->p_sys;
    mpeg2_state_t   state;
    picture_t       *p_pic;

gbazin's avatar
 
gbazin committed
194 195 196 197 198
    block_t *p_block;

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

    p_block = *pp_block;
gbazin's avatar
 
gbazin committed
199 200

    while( 1 )
gbazin's avatar
 
gbazin committed
201
    {
gbazin's avatar
 
gbazin committed
202
        state = mpeg2_parse( p_sys->p_mpeg2dec );
gbazin's avatar
 
gbazin committed
203 204 205 206

        switch( state )
        {
        case STATE_BUFFER:
gbazin's avatar
 
gbazin committed
207
            if( !p_block->i_buffer )
gbazin's avatar
 
gbazin committed
208 209
            {
                block_Release( p_block );
gbazin's avatar
 
gbazin committed
210
                return NULL;
gbazin's avatar
 
gbazin committed
211 212
            }

213 214 215
            if( p_block->b_discontinuity && p_sys->p_synchro &&
                p_sys->p_info->sequence &&
                p_sys->p_info->sequence->width != (unsigned)-1 )
gbazin's avatar
 
gbazin committed
216 217 218 219
            {
                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
220
                {
gbazin's avatar
 
gbazin committed
221 222
                    p_sys->b_garbage_pic = 1;
                    p_pic = p_sys->p_info->current_fbuf->id;
gbazin's avatar
 
gbazin committed
223
                }
gbazin's avatar
 
gbazin committed
224 225 226 227 228 229 230 231 232 233 234
                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 )
235
                {
gbazin's avatar
 
gbazin committed
236 237 238 239
                    vout_SynchroNewPicture( p_sys->p_synchro,
                        I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate );
                    vout_SynchroDecode( p_sys->p_synchro );
                    vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
240
                }
gbazin's avatar
 
gbazin committed
241
            }
242

gbazin's avatar
 
gbazin committed
243 244
            if( p_block->i_pts )
            {
gbazin's avatar
 
gbazin committed
245
#ifdef PIC_FLAG_PTS
gbazin's avatar
 
gbazin committed
246
                mpeg2_pts( p_sys->p_mpeg2dec, (uint32_t)p_block->i_pts );
gbazin's avatar
 
gbazin committed
247 248 249 250 251

#else /* New interface */
                mpeg2_tag_picture( p_sys->p_mpeg2dec,
                                   (uint32_t)p_block->i_pts, 0/*dts*/ );
#endif
gbazin's avatar
 
gbazin committed
252 253
                p_sys->i_previous_pts = p_sys->i_current_pts;
                p_sys->i_current_pts = p_block->i_pts;
gbazin's avatar
 
gbazin committed
254 255
            }

gbazin's avatar
 
gbazin committed
256
            p_sys->i_current_rate = p_block->i_rate;
gbazin's avatar
 
gbazin committed
257

gbazin's avatar
 
gbazin committed
258 259 260
            mpeg2_buffer( p_sys->p_mpeg2dec, p_block->p_buffer,
                          p_block->p_buffer + p_block->i_buffer );

261
            p_block->i_buffer = 0;
gbazin's avatar
 
gbazin committed
262 263 264
            break;

        case STATE_SEQUENCE:
gbazin's avatar
 
gbazin committed
265
        {
gbazin's avatar
 
gbazin committed
266
            /* Initialize video output */
gbazin's avatar
 
gbazin committed
267
            uint8_t *buf[3];
268
            buf[0] = buf[1] = buf[2] = NULL;
gbazin's avatar
 
gbazin committed
269

gbazin's avatar
 
gbazin committed
270 271
            /* Check whether the input gave a particular aspect ratio */
            if( p_dec->fmt_in.video.i_aspect )
gbazin's avatar
 
gbazin committed
272
            {
gbazin's avatar
 
gbazin committed
273
                p_sys->i_aspect = p_dec->fmt_in.video.i_aspect;
gbazin's avatar
 
gbazin committed
274
                if( p_sys->i_aspect <= AR_221_1_PICTURE )
gbazin's avatar
 
gbazin committed
275
                switch( p_sys->i_aspect )
gbazin's avatar
 
gbazin committed
276 277
                {
                case AR_3_4_PICTURE:
gbazin's avatar
 
gbazin committed
278
                    p_sys->i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
gbazin's avatar
 
gbazin committed
279 280
                    break;
                case AR_16_9_PICTURE:
gbazin's avatar
 
gbazin committed
281
                    p_sys->i_aspect = VOUT_ASPECT_FACTOR * 16 / 9;
gbazin's avatar
 
gbazin committed
282 283
                    break;
                case AR_221_1_PICTURE:
gbazin's avatar
 
gbazin committed
284
                    p_sys->i_aspect = VOUT_ASPECT_FACTOR * 221 / 100;
gbazin's avatar
 
gbazin committed
285 286
                    break;
                case AR_SQUARE_PICTURE:
gbazin's avatar
 
gbazin committed
287
                    p_sys->i_aspect = VOUT_ASPECT_FACTOR *
gbazin's avatar
 
gbazin committed
288 289
                                   p_sys->p_info->sequence->width /
                                   p_sys->p_info->sequence->height;
gbazin's avatar
 
gbazin committed
290 291 292 293 294 295
                    break;
                }
            }
            else
            {
                /* Use the value provided in the MPEG sequence header */
gbazin's avatar
 
gbazin committed
296
                p_sys->i_aspect =
297
                    ((uint64_t)p_sys->p_info->sequence->display_width) *
gbazin's avatar
 
gbazin committed
298 299 300
                    p_sys->p_info->sequence->pixel_width * VOUT_ASPECT_FACTOR /
                    p_sys->p_info->sequence->display_height /
                    p_sys->p_info->sequence->pixel_height;
gbazin's avatar
 
gbazin committed
301 302
            }

gbazin's avatar
 
gbazin committed
303 304
            msg_Dbg( p_dec, "%dx%d, aspect %d, %u.%03u fps",
                     p_sys->p_info->sequence->width,
gbazin's avatar
 
gbazin committed
305
                     p_sys->p_info->sequence->height, p_sys->i_aspect,
Sam Hocevar's avatar
Sam Hocevar committed
306
                     (uint32_t)((uint64_t)1001000000 * 27 /
gbazin's avatar
 
gbazin committed
307
                         p_sys->p_info->sequence->frame_period / 1001),
Sam Hocevar's avatar
Sam Hocevar committed
308
                     (uint32_t)((uint64_t)1001000000 * 27 /
gbazin's avatar
 
gbazin committed
309
                         p_sys->p_info->sequence->frame_period % 1001) );
gbazin's avatar
 
gbazin committed
310 311

            mpeg2_custom_fbuf( p_sys->p_mpeg2dec, 1 );
gbazin's avatar
 
gbazin committed
312 313

            /* Set the first 2 reference frames */
gbazin's avatar
 
gbazin committed
314
            mpeg2_set_buf( p_sys->p_mpeg2dec, buf, NULL );
315

gbazin's avatar
 
gbazin committed
316
            if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
317 318 319 320
            {
                block_Release( p_block );
                return NULL;
            }
gbazin's avatar
 
gbazin committed
321

gbazin's avatar
 
gbazin committed
322
            mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
gbazin's avatar
 
gbazin committed
323

324
            /* This picture will never go through display_picture. */
gbazin's avatar
 
gbazin committed
325 326
            p_pic->date = 0;

327 328
            /* 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
329
            p_dec->pf_picture_link( p_dec, p_pic );
330

gbazin's avatar
 
gbazin committed
331
            if( p_sys->p_synchro )
332
            {
gbazin's avatar
 
gbazin committed
333
                vout_SynchroRelease( p_sys->p_synchro );
334
            }
gbazin's avatar
 
gbazin committed
335
            p_sys->p_synchro = vout_SynchroInit( p_dec,
gbazin's avatar
 
gbazin committed
336 337 338
                (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
339 340
        }
        break;
gbazin's avatar
 
gbazin committed
341

342
        case STATE_PICTURE_2ND:
gbazin's avatar
 
gbazin committed
343 344 345
            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,
gbazin's avatar
 
gbazin committed
346
                0, 0, p_sys->i_current_rate );
347

gbazin's avatar
 
gbazin committed
348
            if( p_sys->b_skip )
349
            {
gbazin's avatar
 
gbazin committed
350
                vout_SynchroTrash( p_sys->p_synchro );
351 352 353
            }
            else
            {
gbazin's avatar
 
gbazin committed
354
                vout_SynchroDecode( p_sys->p_synchro );
355 356 357
            }
            break;

gbazin's avatar
 
gbazin committed
358 359 360
        case STATE_PICTURE:
        {
            uint8_t *buf[3];
gbazin's avatar
 
gbazin committed
361
            mtime_t i_pts;
362 363
            buf[0] = buf[1] = buf[2] = NULL;

gbazin's avatar
 
gbazin committed
364 365 366
            if ( p_sys->b_after_sequence_header &&
                 ((p_sys->p_info->current_picture->flags &
                       PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_P) )
367 368
            {
                /* Intra-slice refresh. Simulate a blank I picture. */
gbazin's avatar
 
gbazin committed
369 370 371 372 373 374
                msg_Dbg( p_dec, "intra-slice refresh stream" );
                vout_SynchroNewPicture( p_sys->p_synchro,
                    I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate );
                vout_SynchroDecode( p_sys->p_synchro );
                vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
                p_sys->b_slice_i = 1;
375
            }
gbazin's avatar
 
gbazin committed
376 377
            p_sys->b_after_sequence_header = 0;

gbazin's avatar
 
gbazin committed
378
#ifdef PIC_FLAG_PTS
gbazin's avatar
 
gbazin committed
379 380 381 382 383
            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;

gbazin's avatar
 
gbazin committed
384 385 386 387 388 389 390 391
#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;
#endif

gbazin's avatar
 
gbazin committed
392 393 394 395 396 397 398 399 400 401 402 403 404
            /* 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 */

gbazin's avatar
 
gbazin committed
405 406
            vout_SynchroNewPicture( p_sys->p_synchro,
                p_sys->p_info->current_picture->flags & PIC_MASK_CODING_TYPE,
407
                p_sys->p_info->current_picture->nb_fields, i_pts,
gbazin's avatar
 
gbazin committed
408 409 410 411
                0, p_sys->i_current_rate );

            if ( !(p_sys->b_slice_i
                   && ((p_sys->p_info->current_picture->flags
412
                         & PIC_MASK_CODING_TYPE) == P_CODING_TYPE))
gbazin's avatar
 
gbazin committed
413 414
                   && !vout_SynchroChoose( p_sys->p_synchro,
                              p_sys->p_info->current_picture->flags
gbazin's avatar
 
gbazin committed
415
                                & PIC_MASK_CODING_TYPE,
416
                              /*p_sys->p_vout->render_time*/ 0 /*FIXME*/ ) )
417
            {
gbazin's avatar
 
gbazin committed
418 419 420 421
                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 );
422 423
            }
            else
gbazin's avatar
 
gbazin committed
424
            {
gbazin's avatar
 
gbazin committed
425 426 427
                mpeg2_skip( p_sys->p_mpeg2dec, 0 );
                p_sys->b_skip = 0;
                vout_SynchroDecode( p_sys->p_synchro );
gbazin's avatar
 
gbazin committed
428 429

                if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
430 431 432 433
                {
                    block_Release( p_block );
                    return NULL;
                }
gbazin's avatar
 
gbazin committed
434

gbazin's avatar
 
gbazin committed
435
                mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
gbazin's avatar
 
gbazin committed
436 437
            }
        }
438
        break;
gbazin's avatar
 
gbazin committed
439 440

        case STATE_END:
441
        case STATE_SLICE:
gbazin's avatar
 
gbazin committed
442
            p_pic = NULL;
gbazin's avatar
 
gbazin committed
443 444
            if( p_sys->p_info->display_fbuf
                && p_sys->p_info->display_fbuf->id )
gbazin's avatar
 
gbazin committed
445
            {
gbazin's avatar
 
gbazin committed
446
                p_pic = (picture_t *)p_sys->p_info->display_fbuf->id;
gbazin's avatar
 
gbazin committed
447

gbazin's avatar
 
gbazin committed
448 449
                vout_SynchroEnd( p_sys->p_synchro,
                            p_sys->p_info->display_picture->flags
450
                             & PIC_MASK_CODING_TYPE,
gbazin's avatar
 
gbazin committed
451 452
                            p_sys->b_garbage_pic );
                p_sys->b_garbage_pic = 0;
453

gbazin's avatar
 
gbazin committed
454
                if ( p_sys->p_picture_to_destroy != p_pic )
455
                {
gbazin's avatar
 
gbazin committed
456
                    p_pic->date = vout_SynchroDate( p_sys->p_synchro );
457 458 459
                }
                else
                {
gbazin's avatar
 
gbazin committed
460
                    p_sys->p_picture_to_destroy = NULL;
gbazin's avatar
 
gbazin committed
461
                    p_pic->date = 0;
gbazin's avatar
 
gbazin committed
462
                }
463 464
            }

gbazin's avatar
 
gbazin committed
465 466
            if( p_sys->p_info->discard_fbuf &&
                p_sys->p_info->discard_fbuf->id )
467
            {
gbazin's avatar
 
gbazin committed
468 469
                p_dec->pf_picture_unlink( p_dec,
                                          p_sys->p_info->discard_fbuf->id );
gbazin's avatar
 
gbazin committed
470
            }
gbazin's avatar
 
gbazin committed
471

472
            if( p_pic ) return p_pic;
gbazin's avatar
 
gbazin committed
473

gbazin's avatar
 
gbazin committed
474 475
            break;

476
        case STATE_INVALID:
477 478 479 480
        {
            uint8_t *buf[3];
            buf[0] = buf[1] = buf[2] = NULL;

gbazin's avatar
 
gbazin committed
481
            msg_Warn( p_dec, "invalid picture encountered" );
Sam Hocevar's avatar
Sam Hocevar committed
482
            if ( ( p_sys->p_info->current_picture == NULL ) ||
gbazin's avatar
 
gbazin committed
483
               ( ( p_sys->p_info->current_picture->flags &
484
                   PIC_MASK_CODING_TYPE) != B_CODING_TYPE ) )
485
            {
486
                if( p_sys->p_synchro ) vout_SynchroReset( p_sys->p_synchro );
487
            }
gbazin's avatar
 
gbazin committed
488 489
            mpeg2_skip( p_sys->p_mpeg2dec, 1 );
            p_sys->b_skip = 1;
490

gbazin's avatar
 
gbazin committed
491 492
            if( p_sys->p_info->current_fbuf &&
                p_sys->p_info->current_fbuf->id )
493
            {
gbazin's avatar
 
gbazin committed
494 495
                p_sys->b_garbage_pic = 1;
                p_pic = p_sys->p_info->current_fbuf->id;
496
            }
497 498 499 500
            else if( !p_sys->p_info->sequence )
            {
                break;
            }
501 502 503 504
            else
            {
                if( (p_pic = GetNewPicture( p_dec, buf )) == NULL )
                    break;
gbazin's avatar
 
gbazin committed
505
                mpeg2_set_buf( p_sys->p_mpeg2dec, buf, p_pic );
506
            }
gbazin's avatar
 
gbazin committed
507
            p_sys->p_picture_to_destroy = p_pic;
508 509

            memset( p_pic->p[0].p_pixels, 0,
gbazin's avatar
 
gbazin committed
510 511
                    p_sys->p_info->sequence->width
                     * p_sys->p_info->sequence->height );
512
            memset( p_pic->p[1].p_pixels, 0x80,
gbazin's avatar
 
gbazin committed
513 514
                    p_sys->p_info->sequence->width
                     * p_sys->p_info->sequence->height / 4 );
515
            memset( p_pic->p[2].p_pixels, 0x80,
gbazin's avatar
 
gbazin committed
516 517
                    p_sys->p_info->sequence->width
                     * p_sys->p_info->sequence->height / 4 );
518

gbazin's avatar
 
gbazin committed
519
            if( p_sys->b_slice_i )
520
            {
gbazin's avatar
 
gbazin committed
521 522 523 524
                vout_SynchroNewPicture( p_sys->p_synchro,
                            I_CODING_TYPE, 2, 0, 0, p_sys->i_current_rate );
                vout_SynchroDecode( p_sys->p_synchro );
                vout_SynchroEnd( p_sys->p_synchro, I_CODING_TYPE, 0 );
525
            }
526
            break;
527
        }
528

gbazin's avatar
 
gbazin committed
529 530 531 532 533
        default:
            break;
        }
    }

gbazin's avatar
 
gbazin committed
534 535
    /* Never reached */
    return NULL;
gbazin's avatar
 
gbazin committed
536 537 538
}

/*****************************************************************************
gbazin's avatar
 
gbazin committed
539
 * CloseDecoder: libmpeg2 decoder destruction
gbazin's avatar
 
gbazin committed
540
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
541
static void CloseDecoder( vlc_object_t *p_this )
gbazin's avatar
 
gbazin committed
542
{
gbazin's avatar
 
gbazin committed
543
    decoder_t *p_dec = (decoder_t *)p_this;
gbazin's avatar
 
gbazin committed
544 545
    decoder_sys_t *p_sys = p_dec->p_sys;

gbazin's avatar
 
gbazin committed
546
    if( p_sys->p_synchro ) vout_SynchroRelease( p_sys->p_synchro );
gbazin's avatar
 
gbazin committed
547

gbazin's avatar
 
gbazin committed
548
    if( p_sys->p_mpeg2dec ) mpeg2_close( p_sys->p_mpeg2dec );
gbazin's avatar
 
gbazin committed
549

gbazin's avatar
 
gbazin committed
550
    free( p_sys );
gbazin's avatar
 
gbazin committed
551
}
gbazin's avatar
 
gbazin committed
552 553 554 555

/*****************************************************************************
 * GetNewPicture: Get a new picture from the vout and set the buf struct
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
556
static picture_t *GetNewPicture( decoder_t *p_dec, uint8_t **pp_buf )
gbazin's avatar
 
gbazin committed
557
{
gbazin's avatar
 
gbazin committed
558
    decoder_sys_t *p_sys = p_dec->p_sys;
gbazin's avatar
 
gbazin committed
559
    picture_t *p_pic;
gbazin's avatar
 
gbazin committed
560

gbazin's avatar
 
gbazin committed
561 562 563
    p_dec->fmt_out.video.i_width = p_sys->p_info->sequence->width;
    p_dec->fmt_out.video.i_height = p_sys->p_info->sequence->height;
    p_dec->fmt_out.video.i_aspect = p_sys->i_aspect;
gbazin's avatar
 
gbazin committed
564

gbazin's avatar
 
gbazin committed
565 566 567 568
    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
569

gbazin's avatar
 
gbazin committed
570 571
    /* Get a new picture */
    p_pic = p_dec->pf_vout_buffer_new( p_dec );
gbazin's avatar
 
gbazin committed
572 573 574

    if( p_pic == NULL ) return NULL;

gbazin's avatar
 
gbazin committed
575 576 577 578 579 580 581
    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
582
    p_dec->pf_picture_link( p_dec, p_pic );
gbazin's avatar
 
gbazin committed
583 584 585 586 587 588 589

    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;
}