video.c 39.6 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
344 345 346 347
#ifdef HAVE_AVCODEC_MT
    int i_thread_count = var_InheritInteger( p_dec, "ffmpeg-threads" );
    if( i_thread_count <= 0 )
        i_thread_count = vlc_GetCPUCount();
348 349 350 351
    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
352
#ifdef HAVE_AVCODEC_VA
353
    const bool b_use_hw = var_CreateGetBool( p_dec, "ffmpeg-hw" );
354 355 356 357 358
    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
359
    {
360
#ifdef HAVE_AVCODEC_MT
361 362 363 364 365
        if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
        {
            msg_Warn( p_dec, "threaded frame decoding is not compatible with ffmpeg-hw, disabled" );
            p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
        }
366
#endif
367 368
        p_sys->p_context->get_format = ffmpeg_GetFormat;
    }
Laurent Aimar's avatar
Laurent Aimar committed
369
#endif
370 371 372 373 374
#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
375

376
    /* ***** misc init ***** */
377
    p_sys->i_pts = VLC_TS_INVALID;
378 379
    p_sys->b_has_b_frames = false;
    p_sys->b_first_frame = true;
380
    p_sys->b_flush = false;
381 382 383 384
    p_sys->i_late_frames = 0;

    /* Set output properties */
    p_dec->fmt_out.i_cat = VIDEO_ES;
385 386
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
    {
387
        /* we are doomed. but not really, because most codecs set their pix_fmt later on */
388
        p_dec->fmt_out.i_codec = VLC_CODEC_I420;
389 390
    }
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
391 392

    /* Setup palette */
393
    memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
394
    if( p_dec->fmt_in.video.p_palette )
395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416
    {
        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;
    }
417
    else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
418 419 420
    {
        p_sys->p_context->palctrl = &p_sys->palette;
    }
421

422 423 424
    /* ***** init this codec with special data ***** */
    ffmpeg_InitCodec( p_dec );

425
    /* ***** Open the codec ***** */
426
    if( ffmpeg_OpenCodec( p_dec ) < 0 )
427 428
    {
        msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
429
        av_free( p_sys->p_ff_pic );
Laurent Aimar's avatar
Laurent Aimar committed
430
        vlc_sem_destroy( &p_sys->sem_mt );
431 432 433 434 435 436 437 438 439 440
        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
441
picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
442 443
{
    decoder_sys_t *p_sys = p_dec->p_sys;
444
    AVCodecContext *p_context = p_sys->p_context;
445
    int b_drawpicture;
446
    int b_null_size = false;
447 448
    block_t *p_block;

449 450
    if( !pp_block || !*pp_block )
        return NULL;
451

452
    if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
453
    {
454
        ffmpeg_InitCodec( p_dec );
455 456 457 458 459 460
        if( p_sys->b_delayed_open )
        {
            if( ffmpeg_OpenCodec( p_dec ) )
                msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
        }
    }
461

462
    p_block = *pp_block;
463 464 465 466 467
    if( p_sys->b_delayed_open )
    {
        block_Release( p_block );
        return NULL;
    }
468 469 470

    if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
    {
471
        p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
472 473 474

        p_sys->i_late_frames = 0;

475 476
        if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
            avcodec_flush_buffers( p_context );
Laurent Aimar's avatar
Laurent Aimar committed
477

478
        block_Release( p_block );
479 480 481 482 483 484 485 486 487 488 489
        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;
    }

490
    if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
491
        (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
492
    {
493
        if( p_sys->i_pts > VLC_TS_INVALID )
494 495 496
        {
            msg_Err( p_dec, "more than 5 seconds of late video -> "
                     "dropping frame (computer too slow ?)" );
497
            p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
498 499 500 501 502 503 504 505
        }
        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 &&
506 507
        p_sys->b_hurry_up &&
        (p_sys->i_late_frames > 4) )
508 509
    {
        b_drawpicture = 0;
510
        if( p_sys->i_late_frames < 12 )
511
        {
512
            p_context->skip_frame =
513 514
                    (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
                    AVDISCARD_NONREF : p_sys->i_skip_frame;
515 516 517 518 519 520 521 522 523 524 525 526
        }
        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
    {
527
        if( p_sys->b_hurry_up )
528
            p_context->skip_frame = p_sys->i_skip_frame;
Laurent Aimar's avatar
Laurent Aimar committed
529
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
530 531 532 533 534
            b_drawpicture = 1;
        else
            b_drawpicture = 0;
    }

535
    if( p_context->width <= 0 || p_context->height <= 0 )
536
    {
537
        if( p_sys->b_hurry_up )
538
            p_context->skip_frame = p_sys->i_skip_frame;
539
        b_null_size = true;
540
    }
Laurent Aimar's avatar
Laurent Aimar committed
541 542
    else if( !b_drawpicture )
    {
543 544 545
        /* It creates broken picture
         * FIXME either our parser or ffmpeg is broken */
#if 0
546
        if( p_sys->b_hurry_up )
547
            p_context->skip_frame = __MAX( p_context->skip_frame,
548
                                                  AVDISCARD_NONREF );
549
#endif
Laurent Aimar's avatar
Laurent Aimar committed
550
    }
551 552

    /*
553
     * Do the actual decoding now */
554 555 556 557 558

    /* Don't forget that ffmpeg requires a little more bytes
     * that the real frame size */
    if( p_block->i_buffer > 0 )
    {
559 560
        p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;

561 562 563
        p_block = block_Realloc( p_block, 0,
                            p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
        if( !p_block )
ivoire's avatar
ivoire committed
564
            return NULL;
565
        p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
566
        *pp_block = p_block;
567
        memset( p_block->p_buffer + p_block->i_buffer, 0,
568 569 570
                FF_INPUT_BUFFER_PADDING_SIZE );
    }

571
    while( p_block->i_buffer > 0 || p_sys->b_flush )
572 573 574
    {
        int i_used, b_gotpicture;
        picture_t *p_pic;
575
        AVPacket pkt;
576

577 578 579 580 581 582 583
        /* 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;
584
        p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
585 586 587 588 589

        /* 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
590
        post_mt( p_sys );
591

592 593 594 595 596
        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 );
597

598 599
        if( b_null_size && !p_sys->b_flush &&
            p_context->width > 0 && p_context->height > 0 )
600 601
        {
            /* Reparse it to not drop the I frame */
602
            b_null_size = false;
603
            if( p_sys->b_hurry_up )
604
                p_context->skip_frame = p_sys->i_skip_frame;
605 606
            i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
                                           &b_gotpicture, &pkt );
607
        }
Laurent Aimar's avatar
Laurent Aimar committed
608
        wait_mt( p_sys );
609

610 611 612
        if( p_sys->b_flush )
            p_sys->b_first_frame = true;

613
        if( p_block->i_buffer <= 0 )
614 615
            p_sys->b_flush = false;

616 617
        if( i_used < 0 )
        {
Laurent Aimar's avatar
Laurent Aimar committed
618
            if( b_drawpicture )
619 620
                msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
                          p_block->i_buffer );
621 622 623
            block_Release( p_block );
            return NULL;
        }
Laurent Aimar's avatar
Laurent Aimar committed
624 625
        else if( i_used > p_block->i_buffer ||
                 p_context->thread_count > 1 )
626
        {
627
            i_used = p_block->i_buffer;
628 629 630
        }

        /* Consumed bytes */
631 632
        p_block->i_buffer -= i_used;
        p_block->p_buffer += i_used;
633 634 635 636 637 638 639 640

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

641 642 643 644 645 646
        /* 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;
        }

647 648 649 650 651 652 653 654 655 656 657 658 659
        /* 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;
660 661 662 663 664 665 666 667 668

                /* 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;
                }
669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703
            }
            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);
            }
        }
704

705
        /* Update frame late count (except when doing preroll) */
706 707
        mtime_t i_display_date = 0;
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
708
            i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
709

710
        if( i_display_date > 0 && i_display_date <= mdate() )
711 712 713 714 715 716 717 718 719 720
        {
            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;
        }

721
        if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
722 723 724 725 726
            continue;

        if( !p_sys->p_ff_pic->opaque )
        {
            /* Get a new picture */
727
            p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
728 729 730 731 732 733 734 735 736 737 738 739 740
            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;
741
            decoder_LinkPicture( p_dec, p_pic );
742 743
        }

Laurent Aimar's avatar
Laurent Aimar committed
744
        if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
745 746
        {
            /* Fetch again the aspect ratio in case it changed */
747
            p_dec->fmt_out.video.i_sar_num
748
                = p_context->sample_aspect_ratio.num;
749
            p_dec->fmt_out.video.i_sar_den
750
                = p_context->sample_aspect_ratio.den;
751

Laurent Aimar's avatar
Laurent Aimar committed
752
            if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
753
            {
Laurent Aimar's avatar
Laurent Aimar committed
754 755
                p_dec->fmt_out.video.i_sar_num = 1;
                p_dec->fmt_out.video.i_sar_den = 1;
756 757 758
            }
        }

759
        /* Send decoded frame to vout */
760
        if( i_pts > VLC_TS_INVALID)
761
        {
762
            p_pic->date = i_pts;
763 764 765 766

            if( p_sys->b_first_frame )
            {
                /* Hack to force display of still pictures */
767 768
                p_sys->b_first_frame = false;
                p_pic->b_force = true;
769 770 771 772 773 774
            }

            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;

775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792
            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;
            }

793 794 795 796
            return p_pic;
        }
        else
        {
797
            decoder_DeletePicture( p_dec, p_pic );
798 799 800 801 802 803 804 805 806 807
        }
    }

    block_Release( p_block );
    return NULL;
}

/*****************************************************************************
 * EndVideo: decoder destruction
 *****************************************************************************
808
 * This function is called when the thread ends after a successful
809 810
 * initialization.
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
811
void EndVideoDec( decoder_t *p_dec )
812 813 814
{
    decoder_sys_t *p_sys = p_dec->p_sys;

Laurent Aimar's avatar
Laurent Aimar committed
815 816
    post_mt( p_sys );

817 818 819
    /* 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 );
820

Laurent Aimar's avatar
Laurent Aimar committed
821 822
    wait_mt( p_sys );

823
    if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
824 825

    if( p_sys->p_va )
826
    {
827
        vlc_va_Delete( p_sys->p_va );
828 829
        p_sys->p_va = NULL;
    }
Laurent Aimar's avatar
Laurent Aimar committed
830
    vlc_sem_destroy( &p_sys->sem_mt );
831 832
}

833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849
/*****************************************************************************
 * 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
850 851
        if( !p )
            return;
852 853 854 855 856 857 858

        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 &&
859
            strncmp( (char*)&p[0x56], "SMI ", 4 ) )
860 861 862 863 864 865 866 867 868 869 870
        {
            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;
                }
871
                if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
872 873 874 875 876 877 878 879 880 881 882 883 884 885 886
                {
                    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
887 888 889 890 891 892 893
        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 );
        }
894 895 896
    }
}

897 898 899 900 901 902 903 904 905
/*****************************************************************************
 * 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;

906 907
    if( p_sys->p_va )
    {
908
        vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
909 910
    }
    else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
911 912 913 914 915
    {
        int i_plane, i_size, i_line;
        uint8_t *p_dst, *p_src;
        int i_src_stride, i_dst_stride;

916
        for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
917
        {
918 919 920 921 922 923 924 925
            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++ )
926
            {
927 928 929
                vlc_memcpy( p_dst, p_src, i_size );
                p_src += i_src_stride;
                p_dst += i_dst_stride;
930 931 932 933 934
            }
        }
    }
    else
    {
935 936 937
        msg_Err( p_dec, "don't know how to convert chroma %i",
                 p_sys->p_context->pix_fmt );
        p_dec->b_error = 1;
938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953
    }
}

/*****************************************************************************
 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
 *****************************************************************************
 * It is used for direct rendering as well as to get the right PTS for each
 * decoded picture (even in indirect rendering mode).
 *****************************************************************************/
static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
                               AVFrame *p_ff_pic )
{
    decoder_t *p_dec = (decoder_t *)p_context->opaque;
    decoder_sys_t *p_sys = p_dec->p_sys;
    picture_t *p_pic;

954
    /* */
955
    p_ff_pic->reordered_opaque = p_context->reordered_opaque;