video.c 39.8 KB
Newer Older
1 2 3
/*****************************************************************************
 * video.c: video decoder using the ffmpeg library
 *****************************************************************************
4
 * Copyright (C) 1999-2001 the VideoLAN team
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
 * $Id$
 *
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
 *          Gildas Bazin <gbazin@videolan.org>
 *
 * 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.
 *
 * 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.
23 24 25 26 27
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
28 29 30 31
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

32 33 34 35 36 37 38 39
#if defined(HAVE_LIBAVCODEC_AVCODEC_H) && defined(HAVE_AVCODEC_DXVA2)
# if _WIN32_WINNT < 0x600
/* dxva2 needs Vista support */
#  undef _WIN32_WINNT
#  define _WIN32_WINNT 0x600
# endif
#endif

40
#include <vlc_common.h>
zorglub's avatar
zorglub committed
41
#include <vlc_codec.h>
42
#include <vlc_avcodec.h>
Laurent Aimar's avatar
Laurent Aimar committed
43
#include <vlc_cpu.h>
44
#include <assert.h>
45 46

/* ffmpeg header */
47 48
#ifdef HAVE_LIBAVCODEC_AVCODEC_H
#   include <libavcodec/avcodec.h>
49 50 51
#   ifdef HAVE_AVCODEC_VAAPI
#       include <libavcodec/vaapi.h>
#   endif
52 53 54
#   ifdef HAVE_AVCODEC_DXVA2
#       include <libavcodec/dxva2.h>
#   endif
55
#elif defined(HAVE_FFMPEG_AVCODEC_H)
56
#   include <ffmpeg/avcodec.h>
57 58 59 60
#else
#   include <avcodec.h>
#endif

61
#include "avcodec.h"
62
#include "va.h"
63 64 65
#if defined(HAVE_AVCODEC_VAAPI) || defined(HAVE_AVCODEC_DXVA2)
#   define HAVE_AVCODEC_VA
#endif
66 67 68 69 70 71

/*****************************************************************************
 * decoder_sys_t : decoder descriptor
 *****************************************************************************/
struct decoder_sys_t
{
72
    AVCODEC_COMMON_MEMBERS
73 74 75 76 77 78 79

    /* Video decoder specific part */
    mtime_t i_pts;

    AVFrame          *p_ff_pic;

    /* for frame skipping algo */
80
    bool b_hurry_up;
81 82
    enum AVDiscard i_skip_frame;
    enum AVDiscard i_skip_idct;
83 84 85 86 87 88

    /* how many decoded frames are late */
    int     i_late_frames;
    mtime_t i_late_frames_start;

    /* for direct rendering */
89
    bool b_direct_rendering;
90
    int  i_direct_rendering_used;
91

92
    bool b_has_b_frames;
93 94

    /* Hack to force display of still pictures */
95
    bool b_first_frame;
96

97 98
    /* */
    AVPaletteControl palette;
99 100 101

    /* */
    bool b_flush;
102 103 104

    /* VA API */
    vlc_va_t *p_va;
Laurent Aimar's avatar
Laurent Aimar committed
105 106

    vlc_sem_t sem_mt;
107 108
};

Laurent Aimar's avatar
Laurent Aimar committed
109 110 111 112 113 114 115 116
#ifdef HAVE_AVCODEC_MT
#   define wait_mt(s) vlc_sem_wait( &s->sem_mt )
#   define post_mt(s) vlc_sem_post( &s->sem_mt )
#else
#   define wait_mt(s)
#   define post_mt(s)
#endif

117
/* FIXME (dummy palette for now) */
hartman's avatar
hartman committed
118
static const AVPaletteControl palette_control;
119 120 121 122

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
123
static void ffmpeg_InitCodec      ( decoder_t * );
124 125
static void ffmpeg_CopyPicture    ( decoder_t *, picture_t *, AVFrame * );
static int  ffmpeg_GetFrameBuf    ( struct AVCodecContext *, AVFrame * );
126
static int  ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
127 128
static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );

129
#ifdef HAVE_AVCODEC_VA
130 131
static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
                                          const enum PixelFormat * );
132
#endif
133

134 135 136 137 138 139 140 141 142 143 144 145 146 147
static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
{
    uint8_t *p = (uint8_t*)&fcc;
    return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
}

/*****************************************************************************
 * Local Functions
 *****************************************************************************/

/* Returns a new picture buffer */
static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
                                            AVCodecContext *p_context )
{
148
    decoder_sys_t *p_sys = p_dec->p_sys;
149

150 151
    p_dec->fmt_out.video.i_width = p_context->width;
    p_dec->fmt_out.video.i_height = p_context->height;
152 153 154 155 156 157

    if( !p_context->width || !p_context->height )
    {
        return NULL; /* invalid display size */
    }

158
    if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
159
    {
160 161 162 163
        /* we are doomed, but not really, because most codecs set their pix_fmt
         * much later
         * FIXME does it make sense here ? */
        p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
164
    }
165
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
166 167

    /* If an aspect-ratio was specified in the input format then force it */
Laurent Aimar's avatar
Laurent Aimar committed
168
    if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
169
    {
Laurent Aimar's avatar
Laurent Aimar committed
170 171
        p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
        p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
172 173 174
    }
    else
    {
175 176
        p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
        p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
177

Laurent Aimar's avatar
Laurent Aimar committed
178
        if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
179
        {
Laurent Aimar's avatar
Laurent Aimar committed
180 181
            p_dec->fmt_out.video.i_sar_num = 1;
            p_dec->fmt_out.video.i_sar_den = 1;
182 183 184
        }
    }

Laurent Aimar's avatar
Laurent Aimar committed
185 186
    if( p_dec->fmt_in.video.i_frame_rate > 0 &&
        p_dec->fmt_in.video.i_frame_rate_base > 0 )
187 188 189 190
    {
        p_dec->fmt_out.video.i_frame_rate =
            p_dec->fmt_in.video.i_frame_rate;
        p_dec->fmt_out.video.i_frame_rate_base =
damienf's avatar
damienf committed
191
            p_dec->fmt_in.video.i_frame_rate_base;
192
    }
193
    else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
194 195 196 197
    {
        p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
        p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
    }
198

199
    return decoder_NewPicture( p_dec );
200 201 202 203 204 205 206 207
}

/*****************************************************************************
 * InitVideo: initialize the video decoder
 *****************************************************************************
 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
 * opened (done after the first decoded frame).
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
208
int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
209
                      AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
210 211
{
    decoder_sys_t *p_sys;
212
    int i_val;
213 214

    /* Allocate the memory needed to store the decoder's structure */
ivoire's avatar
ivoire committed
215
    if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
216
        return VLC_ENOMEM;
217

218 219
    p_codec->type = AVMEDIA_TYPE_VIDEO;
    p_context->codec_type = AVMEDIA_TYPE_VIDEO;
220
    p_context->codec_id = i_codec_id;
221 222 223 224
    p_sys->p_context = p_context;
    p_sys->p_codec = p_codec;
    p_sys->i_codec_id = i_codec_id;
    p_sys->psz_namecodec = psz_namecodec;
225
    p_sys->p_ff_pic = avcodec_alloc_frame();
226
    p_sys->b_delayed_open = true;
227
    p_sys->p_va = NULL;
Laurent Aimar's avatar
Laurent Aimar committed
228
    vlc_sem_init( &p_sys->sem_mt, 0 );
229 230

    /* ***** Fill p_context with init values ***** */
231
    p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
232 233 234

    /*  ***** Get configuration of ffmpeg plugin ***** */
    p_sys->p_context->workaround_bugs =
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
235
        var_InheritInteger( p_dec, "ffmpeg-workaround-bugs" );
aballier's avatar
aballier committed
236
    p_sys->p_context->error_recognition =
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
237
        var_InheritInteger( p_dec, "ffmpeg-error-resilience" );
238

239 240
    if( var_CreateGetBool( p_dec, "grayscale" ) )
        p_sys->p_context->flags |= CODEC_FLAG_GRAY;
241

242 243
    i_val = var_CreateGetInteger( p_dec, "ffmpeg-vismv" );
    if( i_val ) p_sys->p_context->debug_mv = i_val;
244

245 246
    i_val = var_CreateGetInteger( p_dec, "ffmpeg-lowres" );
    if( i_val > 0 && i_val <= 2 ) p_sys->p_context->lowres = i_val;
247

248 249 250 251 252
    i_val = var_CreateGetInteger( p_dec, "ffmpeg-skiploopfilter" );
    if( i_val >= 4 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
    else if( i_val == 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
    else if( i_val == 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
    else if( i_val == 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
253

254 255
    if( var_CreateGetBool( p_dec, "ffmpeg-fast" ) )
        p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
256

257
    /* ***** ffmpeg frame skipping ***** */
258
    p_sys->b_hurry_up = var_CreateGetBool( p_dec, "ffmpeg-hurry-up" );
259

260
    switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-frame" ) )
261 262 263 264 265 266 267 268
    {
        case -1:
            p_sys->p_context->skip_frame = AVDISCARD_NONE;
            break;
        case 0:
            p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
            break;
        case 1:
269
            p_sys->p_context->skip_frame = AVDISCARD_NONREF;
270 271 272 273 274 275 276 277 278 279 280
            break;
        case 2:
            p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
            break;
        case 3:
            p_sys->p_context->skip_frame = AVDISCARD_ALL;
            break;
        default:
            p_sys->p_context->skip_frame = AVDISCARD_NONE;
            break;
    }
281
    p_sys->i_skip_frame = p_sys->p_context->skip_frame;
282

283
    switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-idct" ) )
284 285 286 287 288 289 290 291
    {
        case -1:
            p_sys->p_context->skip_idct = AVDISCARD_NONE;
            break;
        case 0:
            p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
            break;
        case 1:
292
            p_sys->p_context->skip_idct = AVDISCARD_NONREF;
293 294 295 296 297 298 299 300 301 302 303
            break;
        case 2:
            p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
            break;
        case 3:
            p_sys->p_context->skip_idct = AVDISCARD_ALL;
            break;
        default:
            p_sys->p_context->skip_idct = AVDISCARD_NONE;
            break;
    }
304
    p_sys->i_skip_idct = p_sys->p_context->skip_idct;
305

306
    /* ***** ffmpeg direct rendering ***** */
307
    p_sys->b_direct_rendering = false;
308
    p_sys->i_direct_rendering_used = -1;
309 310
    if( var_CreateGetBool( p_dec, "ffmpeg-dr" ) &&
       (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
311
        /* No idea why ... but this fixes flickering on some TSCC streams */
312
        p_sys->i_codec_id != CODEC_ID_TSCC && p_sys->i_codec_id != CODEC_ID_CSCD &&
313
#if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT( 52, 68, 2 ) ) && (LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 52, 100, 1 ) )
314 315 316
        /* avcodec native vp8 decode doesn't handle EMU_EDGE flag, and I
           don't have idea howto implement fallback to libvpx decoder */
        p_sys->i_codec_id != CODEC_ID_VP8 &&
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
317
#endif
318 319 320 321
        !p_sys->p_context->debug_mv )
    {
        /* Some codecs set pix_fmt only after the 1st frame has been decoded,
         * so we need to do another check in ffmpeg_GetFrameBuf() */
322
        p_sys->b_direct_rendering = true;
323 324 325
    }

    /* ffmpeg doesn't properly release old pictures when frames are skipped */
326
    //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
327 328
    if( p_sys->b_direct_rendering )
    {
329
        msg_Dbg( p_dec, "trying to use direct rendering" );
330 331
        p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
    }
332 333 334 335
    else
    {
        msg_Dbg( p_dec, "direct rendering is disabled" );
    }
336 337 338 339

    /* Always use our get_buffer wrapper so we can calculate the
     * PTS correctly */
    p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
340
    p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
341 342 343
    p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
    p_sys->p_context->opaque = p_dec;

Laurent Aimar's avatar
Laurent Aimar committed
344 345 346
#ifdef HAVE_AVCODEC_MT
    int i_thread_count = var_InheritInteger( p_dec, "ffmpeg-threads" );
    if( i_thread_count <= 0 )
347
    {
Laurent Aimar's avatar
Laurent Aimar committed
348
        i_thread_count = vlc_GetCPUCount();
349 350 351
        if( i_thread_count > 1 )
            i_thread_count++;
    }
352
    i_thread_count = __MIN( i_thread_count, 16 );
353 354 355 356
    msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
    p_sys->p_context->thread_count = i_thread_count;
#endif

Laurent Aimar's avatar
Laurent Aimar committed
357
#ifdef HAVE_AVCODEC_VA
358
    const bool b_use_hw = var_CreateGetBool( p_dec, "ffmpeg-hw" );
359 360 361 362 363
    if( b_use_hw &&
        (i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ||
         i_codec_id == CODEC_ID_MPEG4 ||
         i_codec_id == CODEC_ID_H264 ||
         i_codec_id == CODEC_ID_VC1 || i_codec_id == CODEC_ID_WMV3) )
Laurent Aimar's avatar
Laurent Aimar committed
364
    {
365
#ifdef HAVE_AVCODEC_MT
366 367 368 369
        if( ( p_sys->p_context->thread_type & FF_THREAD_FRAME ) ||
            ( ( p_sys->p_context->thread_type & FF_THREAD_SLICE ) &&
              ( i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ) )
          )
370 371 372 373
        {
            msg_Warn( p_dec, "threaded frame decoding is not compatible with ffmpeg-hw, disabled" );
            p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
        }
374
#endif
375 376
        p_sys->p_context->get_format = ffmpeg_GetFormat;
    }
Laurent Aimar's avatar
Laurent Aimar committed
377
#endif
378 379 380 381 382
#ifdef HAVE_AVCODEC_MT
    if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
        p_dec->i_extra_picture_buffers = 2 * p_sys->p_context->thread_count;
#endif

Laurent Aimar's avatar
Laurent Aimar committed
383

384
    /* ***** misc init ***** */
385
    p_sys->i_pts = VLC_TS_INVALID;
386 387
    p_sys->b_has_b_frames = false;
    p_sys->b_first_frame = true;
388
    p_sys->b_flush = false;
389 390 391 392
    p_sys->i_late_frames = 0;

    /* Set output properties */
    p_dec->fmt_out.i_cat = VIDEO_ES;
393 394
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
    {
395
        /* we are doomed. but not really, because most codecs set their pix_fmt later on */
396
        p_dec->fmt_out.i_codec = VLC_CODEC_I420;
397 398
    }
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
399 400

    /* Setup palette */
401
    memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
402
    if( p_dec->fmt_in.video.p_palette )
403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424
    {
        p_sys->palette.palette_changed = 1;

        for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
        {
            union {
                uint32_t u;
                uint8_t a[4];
            } c;
            c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
            c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
            c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
            c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];

            p_sys->palette.palette[i] = c.u;
        }
        p_sys->p_context->palctrl = &p_sys->palette;

        p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
        if( p_dec->fmt_out.video.p_palette )
            *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
    }
425
    else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
426 427 428
    {
        p_sys->p_context->palctrl = &p_sys->palette;
    }
429

430 431 432
    /* ***** init this codec with special data ***** */
    ffmpeg_InitCodec( p_dec );

433
    /* ***** Open the codec ***** */
434
    if( ffmpeg_OpenCodec( p_dec ) < 0 )
435 436
    {
        msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
437
        av_free( p_sys->p_ff_pic );
Laurent Aimar's avatar
Laurent Aimar committed
438
        vlc_sem_destroy( &p_sys->sem_mt );
439 440 441 442 443 444 445 446 447 448
        free( p_sys );
        return VLC_EGENERIC;
    }

    return VLC_SUCCESS;
}

/*****************************************************************************
 * DecodeVideo: Called to decode one or more frames
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
449
picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
450 451
{
    decoder_sys_t *p_sys = p_dec->p_sys;
452
    AVCodecContext *p_context = p_sys->p_context;
453
    int b_drawpicture;
454
    int b_null_size = false;
455 456
    block_t *p_block;

457 458
    if( !pp_block || !*pp_block )
        return NULL;
459

460
    if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
461
    {
462
        ffmpeg_InitCodec( p_dec );
463 464 465 466 467 468
        if( p_sys->b_delayed_open )
        {
            if( ffmpeg_OpenCodec( p_dec ) )
                msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
        }
    }
469

470
    p_block = *pp_block;
471 472 473 474 475
    if( p_sys->b_delayed_open )
    {
        block_Release( p_block );
        return NULL;
    }
476 477 478

    if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
    {
479
        p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
480 481 482

        p_sys->i_late_frames = 0;

483 484
        if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
            avcodec_flush_buffers( p_context );
Laurent Aimar's avatar
Laurent Aimar committed
485

486
        block_Release( p_block );
487 488 489 490 491 492 493 494 495 496 497
        return NULL;
    }

    if( p_block->i_flags & BLOCK_FLAG_PREROLL )
    {
        /* Do not care about late frames when prerolling
         * TODO avoid decoding of non reference frame
         * (ie all B except for H264 where it depends only on nal_ref_idc) */
        p_sys->i_late_frames = 0;
    }

498
    if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
499
        (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
500
    {
501
        if( p_sys->i_pts > VLC_TS_INVALID )
502 503 504
        {
            msg_Err( p_dec, "more than 5 seconds of late video -> "
                     "dropping frame (computer too slow ?)" );
505
            p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
506 507 508 509 510 511 512 513
        }
        block_Release( p_block );
        p_sys->i_late_frames--;
        return NULL;
    }

    /* A good idea could be to decode all I pictures and see for the other */
    if( !p_dec->b_pace_control &&
514 515
        p_sys->b_hurry_up &&
        (p_sys->i_late_frames > 4) )
516 517
    {
        b_drawpicture = 0;
518
        if( p_sys->i_late_frames < 12 )
519
        {
520
            p_context->skip_frame =
521 522
                    (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
                    AVDISCARD_NONREF : p_sys->i_skip_frame;
523 524 525 526 527 528 529 530 531 532 533 534
        }
        else
        {
            /* picture too late, won't decode
             * but break picture until a new I, and for mpeg4 ...*/
            p_sys->i_late_frames--; /* needed else it will never be decrease */
            block_Release( p_block );
            return NULL;
        }
    }
    else
    {
535
        if( p_sys->b_hurry_up )
536
            p_context->skip_frame = p_sys->i_skip_frame;
Laurent Aimar's avatar
Laurent Aimar committed
537
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
538 539 540 541 542
            b_drawpicture = 1;
        else
            b_drawpicture = 0;
    }

543
    if( p_context->width <= 0 || p_context->height <= 0 )
544
    {
545
        if( p_sys->b_hurry_up )
546
            p_context->skip_frame = p_sys->i_skip_frame;
547
        b_null_size = true;
548
    }
Laurent Aimar's avatar
Laurent Aimar committed
549 550
    else if( !b_drawpicture )
    {
551 552 553
        /* It creates broken picture
         * FIXME either our parser or ffmpeg is broken */
#if 0
554
        if( p_sys->b_hurry_up )
555
            p_context->skip_frame = __MAX( p_context->skip_frame,
556
                                                  AVDISCARD_NONREF );
557
#endif
Laurent Aimar's avatar
Laurent Aimar committed
558
    }
559 560

    /*
561
     * Do the actual decoding now */
562 563 564 565 566

    /* Don't forget that ffmpeg requires a little more bytes
     * that the real frame size */
    if( p_block->i_buffer > 0 )
    {
567 568
        p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;

569 570 571
        p_block = block_Realloc( p_block, 0,
                            p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
        if( !p_block )
ivoire's avatar
ivoire committed
572
            return NULL;
573
        p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
574
        *pp_block = p_block;
575
        memset( p_block->p_buffer + p_block->i_buffer, 0,
576 577 578
                FF_INPUT_BUFFER_PADDING_SIZE );
    }

579
    while( p_block->i_buffer > 0 || p_sys->b_flush )
580 581 582
    {
        int i_used, b_gotpicture;
        picture_t *p_pic;
583
        AVPacket pkt;
584

585 586 587 588 589 590 591
        /* Set the PTS/DTS in the context reordered_opaque field */
        if( p_block->i_pts > VLC_TS_INVALID  )
            p_context->reordered_opaque = (p_block->i_pts << 1) | 0;
        else if( p_block->i_dts > VLC_TS_INVALID )
            p_context->reordered_opaque = (p_block->i_dts << 1) | 1;
        else
            p_context->reordered_opaque = INT64_MIN;
592
        p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
593 594 595 596 597

        /* Make sure we don't reuse the same timestamps twice */
        p_block->i_pts =
        p_block->i_dts = VLC_TS_INVALID;

Laurent Aimar's avatar
Laurent Aimar committed
598
        post_mt( p_sys );
599

600 601 602 603 604
        av_init_packet( &pkt );
        pkt.data = p_block->p_buffer;
        pkt.size = p_block->i_buffer;
        i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
                                       &b_gotpicture, &pkt );
605

606 607
        if( b_null_size && !p_sys->b_flush &&
            p_context->width > 0 && p_context->height > 0 )
608 609
        {
            /* Reparse it to not drop the I frame */
610
            b_null_size = false;
611
            if( p_sys->b_hurry_up )
612
                p_context->skip_frame = p_sys->i_skip_frame;
613 614
            i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
                                           &b_gotpicture, &pkt );
615
        }
Laurent Aimar's avatar
Laurent Aimar committed
616
        wait_mt( p_sys );
617

618 619 620
        if( p_sys->b_flush )
            p_sys->b_first_frame = true;

621
        if( p_block->i_buffer <= 0 )
622 623
            p_sys->b_flush = false;

624 625
        if( i_used < 0 )
        {
Laurent Aimar's avatar
Laurent Aimar committed
626
            if( b_drawpicture )
627 628
                msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
                          p_block->i_buffer );
629 630 631
            block_Release( p_block );
            return NULL;
        }
Laurent Aimar's avatar
Laurent Aimar committed
632 633
        else if( i_used > p_block->i_buffer ||
                 p_context->thread_count > 1 )
634
        {
635
            i_used = p_block->i_buffer;
636 637 638
        }

        /* Consumed bytes */
639 640
        p_block->i_buffer -= i_used;
        p_block->p_buffer += i_used;
641 642 643 644 645 646 647 648

        /* Nothing to display */
        if( !b_gotpicture )
        {
            if( i_used == 0 ) break;
            continue;
        }

649 650 651 652 653 654
        /* Sanity check (seems to be needed for some streams) */
        if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
        {
            p_sys->b_has_b_frames = true;
        }

655 656 657 658 659 660 661 662 663 664 665 666 667
        /* Compute the PTS */
        mtime_t i_pts = VLC_TS_INVALID;
        if( p_sys->p_ff_pic->reordered_opaque != INT64_MIN )
        {
            mtime_t i_ts = p_sys->p_ff_pic->reordered_opaque >> 1;
            bool    b_dts = p_sys->p_ff_pic->reordered_opaque & 1;
            if( b_dts )
            {
                if( !p_context->has_b_frames ||
                    !p_sys->b_has_b_frames ||
                    !p_sys->p_ff_pic->reference ||
                    p_sys->i_pts <= VLC_TS_INVALID )
                    i_pts = i_ts;
668 669 670 671 672 673 674 675 676

                /* Guess what ? The rules are different for Real Video :( */
                if( (p_dec->fmt_in.i_codec == VLC_CODEC_RV30 ||
                     p_dec->fmt_in.i_codec == VLC_CODEC_RV40) &&
                    p_sys->b_has_b_frames )
                {
                    i_pts = VLC_TS_INVALID;
                    if(p_sys->p_ff_pic->reference) i_pts = i_ts;
                }
677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
            }
            else
            {
                i_pts = i_ts;
            }
        }
        if( i_pts <= VLC_TS_INVALID )
            i_pts = p_sys->i_pts;

        /* Interpolate the next PTS */
        if( i_pts > VLC_TS_INVALID )
            p_sys->i_pts = i_pts;
        if( p_sys->i_pts > VLC_TS_INVALID )
        {
            /* interpolate the next PTS */
            if( p_dec->fmt_in.video.i_frame_rate > 0 &&
                p_dec->fmt_in.video.i_frame_rate_base > 0 )
            {
                p_sys->i_pts += INT64_C(1000000) *
                    (2 + p_sys->p_ff_pic->repeat_pict) *
                    p_dec->fmt_in.video.i_frame_rate_base /
                    (2 * p_dec->fmt_in.video.i_frame_rate);
            }
            else if( p_context->time_base.den > 0 )
            {
                int i_tick = p_context->ticks_per_frame;
                if( i_tick <= 0 )
                    i_tick = 1;

                p_sys->i_pts += INT64_C(1000000) *
                    (2 + p_sys->p_ff_pic->repeat_pict) *
                    i_tick * p_context->time_base.num /
                    (2 * p_context->time_base.den);
            }
        }
712

713
        /* Update frame late count (except when doing preroll) */
714 715
        mtime_t i_display_date = 0;
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
716
            i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
717

718
        if( i_display_date > 0 && i_display_date <= mdate() )
719 720 721 722 723 724 725 726 727 728
        {
            p_sys->i_late_frames++;
            if( p_sys->i_late_frames == 1 )
                p_sys->i_late_frames_start = mdate();
        }
        else
        {
            p_sys->i_late_frames = 0;
        }

729
        if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
730 731 732 733 734
            continue;

        if( !p_sys->p_ff_pic->opaque )
        {
            /* Get a new picture */
735
            p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
736 737 738 739 740 741 742 743 744 745 746 747 748
            if( !p_pic )
            {
                block_Release( p_block );
                return NULL;
            }

            /* Fill p_picture_t from AVVideoFrame and do chroma conversion
             * if needed */
            ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
        }
        else
        {
            p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
749
            decoder_LinkPicture( p_dec, p_pic );
750 751
        }

Laurent Aimar's avatar
Laurent Aimar committed
752
        if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
753 754
        {
            /* Fetch again the aspect ratio in case it changed */
755
            p_dec->fmt_out.video.i_sar_num
756
                = p_context->sample_aspect_ratio.num;
757
            p_dec->fmt_out.video.i_sar_den
758
                = p_context->sample_aspect_ratio.den;
759

Laurent Aimar's avatar
Laurent Aimar committed
760
            if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
761
            {
Laurent Aimar's avatar
Laurent Aimar committed
762 763
                p_dec->fmt_out.video.i_sar_num = 1;
                p_dec->fmt_out.video.i_sar_den = 1;
764 765 766
            }
        }

767
        /* Send decoded frame to vout */
768
        if( i_pts > VLC_TS_INVALID)
769
        {
770
            p_pic->date = i_pts;
771 772 773 774

            if( p_sys->b_first_frame )
            {
                /* Hack to force display of still pictures */
775 776
                p_sys->b_first_frame = false;
                p_pic->b_force = true;
777 778 779 780 781 782
            }

            p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
            p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
            p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;

783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800
            p_pic->i_qstride = p_sys->p_ff_pic->qstride;
            int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
            p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
            memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
                    p_pic->i_qstride * i_mb_h );
            switch( p_sys->p_ff_pic->qscale_type )
            {
                case FF_QSCALE_TYPE_MPEG1:
                    p_pic->i_qtype = QTYPE_MPEG1;
                    break;
                case FF_QSCALE_TYPE_MPEG2:
                    p_pic->i_qtype = QTYPE_MPEG2;
                    break;
                case FF_QSCALE_TYPE_H264:
                    p_pic->i_qtype = QTYPE_H264;
                    break;
            }

801 802 803 804
            return p_pic;
        }
        else
        {
805
            decoder_DeletePicture( p_dec, p_pic );
806 807 808 809 810 811 812 813 814 815
        }
    }

    block_Release( p_block );
    return NULL;
}

/*****************************************************************************
 * EndVideo: decoder destruction
 *****************************************************************************
816
 * This function is called when the thread ends after a successful
817 818
 * initialization.
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
819
void EndVideoDec( decoder_t *p_dec )
820 821 822
{
    decoder_sys_t *p_sys = p_dec->p_sys;

Laurent Aimar's avatar
Laurent Aimar committed
823 824
    post_mt( p_sys );

825 826 827
    /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
    if( p_sys->p_context->codec )
        avcodec_flush_buffers( p_sys->p_context );
828

Laurent Aimar's avatar
Laurent Aimar committed
829 830
    wait_mt( p_sys );

831
    if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
832 833

    if( p_sys->p_va )
834
    {
835
        vlc_va_Delete( p_sys->p_va );
836 837
        p_sys->p_va = NULL;
    }
Laurent Aimar's avatar
Laurent Aimar committed
838
    vlc_sem_destroy( &p_sys->sem_mt );
839 840
}

841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857
/*****************************************************************************
 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
 *****************************************************************************/
static void ffmpeg_InitCodec( decoder_t *p_dec )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    int i_size = p_dec->fmt_in.i_extra;

    if( !i_size ) return;

    if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
    {
        uint8_t *p;

        p_sys->p_context->extradata_size = i_size + 12;
        p = p_sys->p_context->extradata  =
            malloc( p_sys->p_context->extradata_size );
ivoire's avatar
ivoire committed
858 859
        if( !p )
            return;
860 861 862 863 864 865 866

        memcpy( &p[0],  "SVQ3", 4 );
        memset( &p[4], 0, 8 );
        memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );

        /* Now remove all atoms before the SMI one */
        if( p_sys->p_context->extradata_size > 0x5a &&
867
            strncmp( (char*)&p[0x56], "SMI ", 4 ) )
868 869 870 871 872 873 874 875 876 877 878
        {
            uint8_t *psz = &p[0x52];

            while( psz < &p[p_sys->p_context->extradata_size - 8] )
            {
                int i_size = GetDWBE( psz );
                if( i_size <= 1 )
                {
                    /* FIXME handle 1 as long size */
                    break;
                }
879
                if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894
                {
                    memmove( &p[0x52], psz,
                             &p[p_sys->p_context->extradata_size] - psz );
                    break;
                }

                psz += i_size;
            }
        }
    }
    else
    {
        p_sys->p_context->extradata_size = i_size;
        p_sys->p_context->extradata =
            malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
ivoire's avatar
ivoire committed
895 896 897 898 899 900 901
        if( p_sys->p_context->extradata )
        {
            memcpy( p_sys->p_context->extradata,
                    p_dec->fmt_in.p_extra, i_size );
            memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
                    0, FF_INPUT_BUFFER_PADDING_SIZE );
        }
902 903 904
    }
}

905 906 907 908 909 910 911 912 913
/*****************************************************************************
 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
 *                     picture_t structure (when not in direct rendering mode).
 *****************************************************************************/
static void ffmpeg_CopyPicture( decoder_t *p_dec,
                                picture_t *p_pic, AVFrame *p_ff_pic )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

914 915
    if( p_sys->p_va )
    {
916
        vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
917 918
    }
    else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
919 920 921 922 923
    {
        int i_plane, i_size, i_line;
        uint8_t *p_dst, *p_src;
        int i_src_stride, i_dst_stride;

924
        for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
925
        {
926 927 928 929 930 931 932 933
            p_src  = p_ff_pic->data[i_plane];
            p_dst = p_pic->p[i_plane].p_pixels;
            i_src_stride = p_ff_pic->linesize[i_plane];
            i_dst_stride = p_pic->p[i_plane].i_pitch;

            i_size = __MIN( i_src_stride, i_dst_stride );
            for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
                 i_line++ )
934
            {
935 936 937
                vlc_memcpy( p_dst, p_src, i_size );
                p_src += i_src_stride;
                p_dst += i_dst_stride;
938 939 940 941 942
            }
        }
    }
    else
    {
943 944 945
        msg_Err( p_dec, "don't know how to convert chroma %i",
                 p_sys->p_context->pix_fmt );
        p_dec->b_error = 1;
946 947 948 949