video.c 38.9 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
#include <vlc_common.h>
zorglub's avatar
zorglub committed
33
#include <vlc_codec.h>
34
#include <vlc_avcodec.h>
Laurent Aimar's avatar
Laurent Aimar committed
35
#include <vlc_cpu.h>
36
#include <assert.h>
37 38

/* ffmpeg header */
39 40
#ifdef HAVE_LIBAVCODEC_AVCODEC_H
#   include <libavcodec/avcodec.h>
41 42 43
#   ifdef HAVE_AVCODEC_VAAPI
#       include <libavcodec/vaapi.h>
#   endif
44 45 46
#   ifdef HAVE_AVCODEC_DXVA2
#       include <libavcodec/dxva2.h>
#   endif
47
#elif defined(HAVE_FFMPEG_AVCODEC_H)
48
#   include <ffmpeg/avcodec.h>
49 50 51 52
#else
#   include <avcodec.h>
#endif

53
#include "avcodec.h"
54
#include "va.h"
55 56 57
#if defined(HAVE_AVCODEC_VAAPI) || defined(HAVE_AVCODEC_DXVA2)
#   define HAVE_AVCODEC_VA
#endif
58 59 60 61 62 63

/*****************************************************************************
 * decoder_sys_t : decoder descriptor
 *****************************************************************************/
struct decoder_sys_t
{
64
    FFMPEG_COMMON_MEMBERS
65 66 67 68 69 70 71

    /* Video decoder specific part */
    mtime_t i_pts;

    AVFrame          *p_ff_pic;

    /* for frame skipping algo */
72
    bool b_hurry_up;
73 74
    enum AVDiscard i_skip_frame;
    enum AVDiscard i_skip_idct;
75 76 77 78 79 80

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

    /* for direct rendering */
81
    bool b_direct_rendering;
82
    int  i_direct_rendering_used;
83

84
    bool b_has_b_frames;
85 86

    /* Hack to force display of still pictures */
87
    bool b_first_frame;
88

89 90
    /* */
    AVPaletteControl palette;
91 92 93

    /* */
    bool b_flush;
94 95 96

    /* VA API */
    vlc_va_t *p_va;
Laurent Aimar's avatar
Laurent Aimar committed
97 98

    vlc_sem_t sem_mt;
99 100
};

Laurent Aimar's avatar
Laurent Aimar committed
101 102 103 104 105 106 107 108
#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

109
/* FIXME (dummy palette for now) */
hartman's avatar
hartman committed
110
static const AVPaletteControl palette_control;
111 112 113 114

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
115
static void ffmpeg_InitCodec      ( decoder_t * );
116 117
static void ffmpeg_CopyPicture    ( decoder_t *, picture_t *, AVFrame * );
static int  ffmpeg_GetFrameBuf    ( struct AVCodecContext *, AVFrame * );
118
static int  ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
119 120
static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );

121
#ifdef HAVE_AVCODEC_VA
122 123
static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
                                          const enum PixelFormat * );
124
#endif
125

126 127 128 129 130 131 132 133 134 135 136 137 138 139
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 )
{
140
    decoder_sys_t *p_sys = p_dec->p_sys;
141 142 143 144 145 146 147 148 149

    p_dec->fmt_out.video.i_width = p_context->width;
    p_dec->fmt_out.video.i_height = p_context->height;

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

150
    if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
151
    {
152 153 154 155
        /* 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;
156
    }
157
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
158 159

    /* If an aspect-ratio was specified in the input format then force it */
Laurent Aimar's avatar
Laurent Aimar committed
160
    if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
161
    {
Laurent Aimar's avatar
Laurent Aimar committed
162 163
        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;
164 165 166
    }
    else
    {
167 168
        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;
169

Laurent Aimar's avatar
Laurent Aimar committed
170
        if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
171
        {
Laurent Aimar's avatar
Laurent Aimar committed
172 173
            p_dec->fmt_out.video.i_sar_num = 1;
            p_dec->fmt_out.video.i_sar_den = 1;
174 175 176
        }
    }

Laurent Aimar's avatar
Laurent Aimar committed
177 178
    if( p_dec->fmt_in.video.i_frame_rate > 0 &&
        p_dec->fmt_in.video.i_frame_rate_base > 0 )
179 180 181 182
    {
        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
183
            p_dec->fmt_in.video.i_frame_rate_base;
184
    }
185
    else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
186 187 188 189
    {
        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;
    }
190

191
    return decoder_NewPicture( p_dec );
192 193 194 195 196 197 198 199
}

/*****************************************************************************
 * 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
200
int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
201
                      AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
202 203
{
    decoder_sys_t *p_sys;
204
    int i_val;
205 206

    /* Allocate the memory needed to store the decoder's structure */
ivoire's avatar
ivoire committed
207
    if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
208
        return VLC_ENOMEM;
209

210 211 212
    p_codec->type = CODEC_TYPE_VIDEO;
    p_context->codec_type = CODEC_TYPE_VIDEO;
    p_context->codec_id = i_codec_id;
213 214 215 216
    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;
217
    p_sys->p_ff_pic = avcodec_alloc_frame();
218
    p_sys->b_delayed_open = true;
219
    p_sys->p_va = NULL;
Laurent Aimar's avatar
Laurent Aimar committed
220
    vlc_sem_init( &p_sys->sem_mt, 0 );
221 222

    /* ***** Fill p_context with init values ***** */
223
    p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
224 225 226

    /*  ***** Get configuration of ffmpeg plugin ***** */
    p_sys->p_context->workaround_bugs =
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
227
        var_InheritInteger( p_dec, "ffmpeg-workaround-bugs" );
aballier's avatar
aballier committed
228
    p_sys->p_context->error_recognition =
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
229
        var_InheritInteger( p_dec, "ffmpeg-error-resilience" );
230

231 232
    if( var_CreateGetBool( p_dec, "grayscale" ) )
        p_sys->p_context->flags |= CODEC_FLAG_GRAY;
233

234 235
    i_val = var_CreateGetInteger( p_dec, "ffmpeg-vismv" );
    if( i_val ) p_sys->p_context->debug_mv = i_val;
236

237 238
    i_val = var_CreateGetInteger( p_dec, "ffmpeg-lowres" );
    if( i_val > 0 && i_val <= 2 ) p_sys->p_context->lowres = i_val;
239

240 241 242 243 244
    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;
245

246 247
    if( var_CreateGetBool( p_dec, "ffmpeg-fast" ) )
        p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
248

249
    /* ***** ffmpeg frame skipping ***** */
250
    p_sys->b_hurry_up = var_CreateGetBool( p_dec, "ffmpeg-hurry-up" );
251

252
    switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-frame" ) )
253 254 255 256 257 258 259 260
    {
        case -1:
            p_sys->p_context->skip_frame = AVDISCARD_NONE;
            break;
        case 0:
            p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
            break;
        case 1:
261
            p_sys->p_context->skip_frame = AVDISCARD_NONREF;
262 263 264 265 266 267 268 269 270 271 272
            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;
    }
273
    p_sys->i_skip_frame = p_sys->p_context->skip_frame;
274

275
    switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-idct" ) )
276 277 278 279 280 281 282 283
    {
        case -1:
            p_sys->p_context->skip_idct = AVDISCARD_NONE;
            break;
        case 0:
            p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
            break;
        case 1:
284
            p_sys->p_context->skip_idct = AVDISCARD_NONREF;
285 286 287 288 289 290 291 292 293 294 295
            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;
    }
296
    p_sys->i_skip_idct = p_sys->p_context->skip_idct;
297

298
    /* ***** ffmpeg direct rendering ***** */
299
    p_sys->b_direct_rendering = false;
300
    p_sys->i_direct_rendering_used = -1;
301 302
    if( var_CreateGetBool( p_dec, "ffmpeg-dr" ) &&
       (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
303 304
        /* No idea why ... but this fixes flickering on some TSCC streams */
        p_sys->i_codec_id != CODEC_ID_TSCC &&
305
#if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT( 52, 68, 2 ) ) && (LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 52, 100, 1 ) )
306 307 308
        /* 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
309
#endif
310 311 312 313
        !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() */
314
        p_sys->b_direct_rendering = true;
315 316 317
    }

    /* ffmpeg doesn't properly release old pictures when frames are skipped */
318
    //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
319 320
    if( p_sys->b_direct_rendering )
    {
321
        msg_Dbg( p_dec, "trying to use direct rendering" );
322 323
        p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
    }
324 325 326 327
    else
    {
        msg_Dbg( p_dec, "direct rendering is disabled" );
    }
328 329 330 331

    /* Always use our get_buffer wrapper so we can calculate the
     * PTS correctly */
    p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
332
    p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
333 334 335
    p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
    p_sys->p_context->opaque = p_dec;

Laurent Aimar's avatar
Laurent Aimar committed
336 337 338 339
#ifdef HAVE_AVCODEC_MT
    int i_thread_count = var_InheritInteger( p_dec, "ffmpeg-threads" );
    if( i_thread_count <= 0 )
        i_thread_count = vlc_GetCPUCount();
340 341 342 343
    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
344
#ifdef HAVE_AVCODEC_VA
345
    const bool b_use_hw = var_CreateGetBool( p_dec, "ffmpeg-hw" );
Laurent Aimar's avatar
Laurent Aimar committed
346 347
    if( b_use_hw )
    {
348 349 350 351
#ifdef HAVE_AVCODEC_MT
        msg_Err( p_dec, "ffmpeg-hw is not compatible with ffmpeg-mt" );
#else
        p_sys->p_context->get_format = ffmpeg_GetFormat;
Laurent Aimar's avatar
Laurent Aimar committed
352
#endif
353
    }
Laurent Aimar's avatar
Laurent Aimar committed
354 355
#endif

356
    /* ***** misc init ***** */
357
    p_sys->i_pts = VLC_TS_INVALID;
358 359
    p_sys->b_has_b_frames = false;
    p_sys->b_first_frame = true;
360
    p_sys->b_flush = false;
361 362 363 364
    p_sys->i_late_frames = 0;

    /* Set output properties */
    p_dec->fmt_out.i_cat = VIDEO_ES;
365 366
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
    {
367
        /* we are doomed. but not really, because most codecs set their pix_fmt later on */
368
        p_dec->fmt_out.i_codec = VLC_CODEC_I420;
369 370
    }
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
371 372

    /* Setup palette */
373
    memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
374
    if( p_dec->fmt_in.video.p_palette )
375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396
    {
        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;
    }
397
    else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
398 399 400
    {
        p_sys->p_context->palctrl = &p_sys->palette;
    }
401

402 403 404
    /* ***** init this codec with special data ***** */
    ffmpeg_InitCodec( p_dec );

405
    /* ***** Open the codec ***** */
406
    if( ffmpeg_OpenCodec( p_dec ) < 0 )
407 408
    {
        msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
409
        av_free( p_sys->p_ff_pic );
Laurent Aimar's avatar
Laurent Aimar committed
410
        vlc_sem_destroy( &p_sys->sem_mt );
411 412 413 414 415 416 417 418 419 420
        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
421
picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
422 423
{
    decoder_sys_t *p_sys = p_dec->p_sys;
424
    AVCodecContext *p_context = p_sys->p_context;
425
    int b_drawpicture;
426
    int b_null_size = false;
427 428
    block_t *p_block;

429 430
    if( !pp_block || !*pp_block )
        return NULL;
431

432
    if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
433
    {
434
        ffmpeg_InitCodec( p_dec );
435 436 437 438 439 440
        if( p_sys->b_delayed_open )
        {
            if( ffmpeg_OpenCodec( p_dec ) )
                msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
        }
    }
441

442
    p_block = *pp_block;
443 444 445 446 447
    if( p_sys->b_delayed_open )
    {
        block_Release( p_block );
        return NULL;
    }
448 449 450

    if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
    {
451
        p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
452 453 454

        p_sys->i_late_frames = 0;

455 456
        if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
            avcodec_flush_buffers( p_context );
Laurent Aimar's avatar
Laurent Aimar committed
457

458
        block_Release( p_block );
459 460 461 462 463 464 465 466 467 468 469
        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;
    }

470
    if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
471
        (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
472
    {
473
        if( p_sys->i_pts > VLC_TS_INVALID )
474 475 476
        {
            msg_Err( p_dec, "more than 5 seconds of late video -> "
                     "dropping frame (computer too slow ?)" );
477
            p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
478 479 480 481 482 483 484 485
        }
        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 &&
486 487
        p_sys->b_hurry_up &&
        (p_sys->i_late_frames > 4) )
488 489
    {
        b_drawpicture = 0;
490
        if( p_sys->i_late_frames < 12 )
491
        {
492
            p_context->skip_frame =
493 494
                    (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
                    AVDISCARD_NONREF : p_sys->i_skip_frame;
495 496 497 498 499 500 501 502 503 504 505 506
        }
        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
    {
507
        if( p_sys->b_hurry_up )
508
            p_context->skip_frame = p_sys->i_skip_frame;
Laurent Aimar's avatar
Laurent Aimar committed
509
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
510 511 512 513 514
            b_drawpicture = 1;
        else
            b_drawpicture = 0;
    }

515
    if( p_context->width <= 0 || p_context->height <= 0 )
516
    {
517
        if( p_sys->b_hurry_up )
518
            p_context->skip_frame = p_sys->i_skip_frame;
519
        b_null_size = true;
520
    }
Laurent Aimar's avatar
Laurent Aimar committed
521 522
    else if( !b_drawpicture )
    {
523 524 525
        /* It creates broken picture
         * FIXME either our parser or ffmpeg is broken */
#if 0
526
        if( p_sys->b_hurry_up )
527
            p_context->skip_frame = __MAX( p_context->skip_frame,
528
                                                  AVDISCARD_NONREF );
529
#endif
Laurent Aimar's avatar
Laurent Aimar committed
530
    }
531 532

    /*
533
     * Do the actual decoding now */
534 535 536 537 538

    /* Don't forget that ffmpeg requires a little more bytes
     * that the real frame size */
    if( p_block->i_buffer > 0 )
    {
539 540
        p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;

541 542 543
        p_block = block_Realloc( p_block, 0,
                            p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
        if( !p_block )
ivoire's avatar
ivoire committed
544
            return NULL;
545
        p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
546
        *pp_block = p_block;
547
        memset( p_block->p_buffer + p_block->i_buffer, 0,
548 549 550
                FF_INPUT_BUFFER_PADDING_SIZE );
    }

551
    while( p_block->i_buffer > 0 || p_sys->b_flush )
552 553 554 555
    {
        int i_used, b_gotpicture;
        picture_t *p_pic;

556 557 558 559 560 561 562
        /* 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;
563
        p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
564 565 566 567 568

        /* 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
569
        post_mt( p_sys );
570 571

        i_used = avcodec_decode_video( p_context, p_sys->p_ff_pic,
572
                                       &b_gotpicture,
573
                                       p_block->i_buffer <= 0 && p_sys->b_flush ? NULL : p_block->p_buffer, p_block->i_buffer );
574

575 576
        if( b_null_size && !p_sys->b_flush &&
            p_context->width > 0 && p_context->height > 0 )
577 578
        {
            /* Reparse it to not drop the I frame */
579
            b_null_size = false;
580
            if( p_sys->b_hurry_up )
581 582
                p_context->skip_frame = p_sys->i_skip_frame;
            i_used = avcodec_decode_video( p_context, p_sys->p_ff_pic,
583 584
                                           &b_gotpicture, p_block->p_buffer,
                                           p_block->i_buffer );
585
        }
Laurent Aimar's avatar
Laurent Aimar committed
586
        wait_mt( p_sys );
587

588 589 590
        if( p_sys->b_flush )
            p_sys->b_first_frame = true;

591
        if( p_block->i_buffer <= 0 )
592 593
            p_sys->b_flush = false;

594 595
        if( i_used < 0 )
        {
Laurent Aimar's avatar
Laurent Aimar committed
596
            if( b_drawpicture )
597 598
                msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
                          p_block->i_buffer );
599 600 601
            block_Release( p_block );
            return NULL;
        }
Laurent Aimar's avatar
Laurent Aimar committed
602 603
        else if( i_used > p_block->i_buffer ||
                 p_context->thread_count > 1 )
604
        {
605
            i_used = p_block->i_buffer;
606 607 608
        }

        /* Consumed bytes */
609 610
        p_block->i_buffer -= i_used;
        p_block->p_buffer += i_used;
611 612 613 614 615 616 617 618

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

619 620 621 622 623 624
        /* 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;
        }

625 626 627 628 629 630 631 632 633 634 635 636 637
        /* 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;
638 639 640 641 642 643 644 645 646

                /* 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;
                }
647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681
            }
            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);
            }
        }
682

683
        /* Update frame late count (except when doing preroll) */
684 685
        mtime_t i_display_date = 0;
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
686
            i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
687

688
        if( i_display_date > 0 && i_display_date <= mdate() )
689 690 691 692 693 694 695 696 697 698
        {
            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;
        }

699
        if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
700 701 702 703 704
            continue;

        if( !p_sys->p_ff_pic->opaque )
        {
            /* Get a new picture */
705
            p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
706 707 708 709 710 711 712 713 714 715 716 717 718
            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;
719
            decoder_LinkPicture( p_dec, p_pic );
720 721
        }

Laurent Aimar's avatar
Laurent Aimar committed
722
        if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
723 724
        {
            /* Fetch again the aspect ratio in case it changed */
725
            p_dec->fmt_out.video.i_sar_num
726
                = p_context->sample_aspect_ratio.num;
727
            p_dec->fmt_out.video.i_sar_den
728
                = p_context->sample_aspect_ratio.den;
729

Laurent Aimar's avatar
Laurent Aimar committed
730
            if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
731
            {
Laurent Aimar's avatar
Laurent Aimar committed
732 733
                p_dec->fmt_out.video.i_sar_num = 1;
                p_dec->fmt_out.video.i_sar_den = 1;
734 735 736
            }
        }

737
        /* Send decoded frame to vout */
738
        if( i_pts > VLC_TS_INVALID)
739
        {
740
            p_pic->date = i_pts;
741 742 743 744

            if( p_sys->b_first_frame )
            {
                /* Hack to force display of still pictures */
745 746
                p_sys->b_first_frame = false;
                p_pic->b_force = true;
747 748 749 750 751 752
            }

            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;

753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770
            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;
            }

771 772 773 774
            return p_pic;
        }
        else
        {
775
            decoder_DeletePicture( p_dec, p_pic );
776 777 778 779 780 781 782 783 784 785
        }
    }

    block_Release( p_block );
    return NULL;
}

/*****************************************************************************
 * EndVideo: decoder destruction
 *****************************************************************************
786
 * This function is called when the thread ends after a successful
787 788
 * initialization.
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
789
void EndVideoDec( decoder_t *p_dec )
790 791 792
{
    decoder_sys_t *p_sys = p_dec->p_sys;

Laurent Aimar's avatar
Laurent Aimar committed
793 794
    post_mt( p_sys );

795 796 797
    /* 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 );
798

Laurent Aimar's avatar
Laurent Aimar committed
799 800
    wait_mt( p_sys );

801
    if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
802 803

    if( p_sys->p_va )
804
    {
805
        vlc_va_Delete( p_sys->p_va );
806 807
        p_sys->p_va = NULL;
    }
Laurent Aimar's avatar
Laurent Aimar committed
808
    vlc_sem_destroy( &p_sys->sem_mt );
809 810
}

811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827
/*****************************************************************************
 * 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
828 829
        if( !p )
            return;
830 831 832 833 834 835 836

        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 &&
837
            strncmp( (char*)&p[0x56], "SMI ", 4 ) )
838 839 840 841 842 843 844 845 846 847 848
        {
            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;
                }
849
                if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
850 851 852 853 854 855 856 857 858 859 860 861 862 863 864
                {
                    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
865 866 867 868 869 870 871
        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 );
        }
872 873 874
    }
}

875 876 877 878 879 880 881 882 883
/*****************************************************************************
 * 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;

884 885
    if( p_sys->p_va )
    {
886
        vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
887 888
    }
    else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
889 890 891 892 893
    {
        int i_plane, i_size, i_line;
        uint8_t *p_dst, *p_src;
        int i_src_stride, i_dst_stride;

894
        for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
895
        {
896 897 898 899 900 901 902 903
            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++ )
904
            {
905 906 907
                vlc_memcpy( p_dst, p_src, i_size );
                p_src += i_src_stride;
                p_dst += i_dst_stride;
908 909 910 911 912
            }
        }
    }
    else
    {
913 914 915
        msg_Err( p_dec, "don't know how to convert chroma %i",
                 p_sys->p_context->pix_fmt );
        p_dec->b_error = 1;
916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931
    }
}

/*****************************************************************************
 * 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;

932
    /* */
933
    p_ff_pic->reordered_opaque = p_context->reordered_opaque;
934 935 936 937
    p_ff_pic->opaque = NULL;

    if( p_sys->p_va )
    {
938
#ifdef HAVE_AVCODEC_VA
939
        /* hwaccel_context is not present in old fffmpeg version */
940 941 942
        if( vlc_va_Setup( p_sys->p_va,
                          &p_sys->p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
                          p_sys->p_context->width, p_sys->p_context->height ) )
943
        {
944
            msg_Err( p_dec, "vlc_va_Setup failed" );
945 946
            return -1;
        }
947 948 949
#else
        assert(0);
#endif
950 951 952 953 954

        /* */
        p_ff_pic->type = FF_BUFFER_TYPE_USER;
        /* FIXME what is that, should give good value */
        p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
955