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
    i_thread_count = __MIN( i_thread_count, 16 );
349 350 351 352
    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
353
#ifdef HAVE_AVCODEC_VA
354
    const bool b_use_hw = var_CreateGetBool( p_dec, "ffmpeg-hw" );
355 356 357 358 359
    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
360
    {
361
#ifdef HAVE_AVCODEC_MT
362 363 364 365 366
        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;
        }
367
#endif
368 369
        p_sys->p_context->get_format = ffmpeg_GetFormat;
    }
Laurent Aimar's avatar
Laurent Aimar committed
370
#endif
371 372 373 374 375
#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
376

377
    /* ***** misc init ***** */
378
    p_sys->i_pts = VLC_TS_INVALID;
379 380
    p_sys->b_has_b_frames = false;
    p_sys->b_first_frame = true;
381
    p_sys->b_flush = false;
382 383 384 385
    p_sys->i_late_frames = 0;

    /* Set output properties */
    p_dec->fmt_out.i_cat = VIDEO_ES;
386 387
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
    {
388
        /* we are doomed. but not really, because most codecs set their pix_fmt later on */
389
        p_dec->fmt_out.i_codec = VLC_CODEC_I420;
390 391
    }
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
392 393

    /* Setup palette */
394
    memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
395
    if( p_dec->fmt_in.video.p_palette )
396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417
    {
        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;
    }
418
    else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
419 420 421
    {
        p_sys->p_context->palctrl = &p_sys->palette;
    }
422

423 424 425
    /* ***** init this codec with special data ***** */
    ffmpeg_InitCodec( p_dec );

426
    /* ***** Open the codec ***** */
427
    if( ffmpeg_OpenCodec( p_dec ) < 0 )
428 429
    {
        msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
430
        av_free( p_sys->p_ff_pic );
Laurent Aimar's avatar
Laurent Aimar committed
431
        vlc_sem_destroy( &p_sys->sem_mt );
432 433 434 435 436 437 438 439 440 441
        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
442
picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
443 444
{
    decoder_sys_t *p_sys = p_dec->p_sys;
445
    AVCodecContext *p_context = p_sys->p_context;
446
    int b_drawpicture;
447
    int b_null_size = false;
448 449
    block_t *p_block;

450 451
    if( !pp_block || !*pp_block )
        return NULL;
452

453
    if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
454
    {
455
        ffmpeg_InitCodec( p_dec );
456 457 458 459 460 461
        if( p_sys->b_delayed_open )
        {
            if( ffmpeg_OpenCodec( p_dec ) )
                msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
        }
    }
462

463
    p_block = *pp_block;
464 465 466 467 468
    if( p_sys->b_delayed_open )
    {
        block_Release( p_block );
        return NULL;
    }
469 470 471

    if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
    {
472
        p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
473 474 475

        p_sys->i_late_frames = 0;

476 477
        if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
            avcodec_flush_buffers( p_context );
Laurent Aimar's avatar
Laurent Aimar committed
478

479
        block_Release( p_block );
480 481 482 483 484 485 486 487 488 489 490
        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;
    }

491
    if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
492
        (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
493
    {
494
        if( p_sys->i_pts > VLC_TS_INVALID )
495 496 497
        {
            msg_Err( p_dec, "more than 5 seconds of late video -> "
                     "dropping frame (computer too slow ?)" );
498
            p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
499 500 501 502 503 504 505 506
        }
        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 &&
507 508
        p_sys->b_hurry_up &&
        (p_sys->i_late_frames > 4) )
509 510
    {
        b_drawpicture = 0;
511
        if( p_sys->i_late_frames < 12 )
512
        {
513
            p_context->skip_frame =
514 515
                    (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
                    AVDISCARD_NONREF : p_sys->i_skip_frame;
516 517 518 519 520 521 522 523 524 525 526 527
        }
        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
    {
528
        if( p_sys->b_hurry_up )
529
            p_context->skip_frame = p_sys->i_skip_frame;
Laurent Aimar's avatar
Laurent Aimar committed
530
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
531 532 533 534 535
            b_drawpicture = 1;
        else
            b_drawpicture = 0;
    }

536
    if( p_context->width <= 0 || p_context->height <= 0 )
537
    {
538
        if( p_sys->b_hurry_up )
539
            p_context->skip_frame = p_sys->i_skip_frame;
540
        b_null_size = true;
541
    }
Laurent Aimar's avatar
Laurent Aimar committed
542 543
    else if( !b_drawpicture )
    {
544 545 546
        /* It creates broken picture
         * FIXME either our parser or ffmpeg is broken */
#if 0
547
        if( p_sys->b_hurry_up )
548
            p_context->skip_frame = __MAX( p_context->skip_frame,
549
                                                  AVDISCARD_NONREF );
550
#endif
Laurent Aimar's avatar
Laurent Aimar committed
551
    }
552 553

    /*
554
     * Do the actual decoding now */
555 556 557 558 559

    /* Don't forget that ffmpeg requires a little more bytes
     * that the real frame size */
    if( p_block->i_buffer > 0 )
    {
560 561
        p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;

562 563 564
        p_block = block_Realloc( p_block, 0,
                            p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
        if( !p_block )
ivoire's avatar
ivoire committed
565
            return NULL;
566
        p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
567
        *pp_block = p_block;
568
        memset( p_block->p_buffer + p_block->i_buffer, 0,
569 570 571
                FF_INPUT_BUFFER_PADDING_SIZE );
    }

572
    while( p_block->i_buffer > 0 || p_sys->b_flush )
573 574 575
    {
        int i_used, b_gotpicture;
        picture_t *p_pic;
576
        AVPacket pkt;
577

578 579 580 581 582 583 584
        /* 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;
585
        p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
586 587 588 589 590

        /* 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
591
        post_mt( p_sys );
592

593 594 595 596 597
        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 );
598

599 600
        if( b_null_size && !p_sys->b_flush &&
            p_context->width > 0 && p_context->height > 0 )
601 602
        {
            /* Reparse it to not drop the I frame */
603
            b_null_size = false;
604
            if( p_sys->b_hurry_up )
605
                p_context->skip_frame = p_sys->i_skip_frame;
606 607
            i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
                                           &b_gotpicture, &pkt );
608
        }
Laurent Aimar's avatar
Laurent Aimar committed
609
        wait_mt( p_sys );
610

611 612 613
        if( p_sys->b_flush )
            p_sys->b_first_frame = true;

614
        if( p_block->i_buffer <= 0 )
615 616
            p_sys->b_flush = false;

617 618
        if( i_used < 0 )
        {
Laurent Aimar's avatar
Laurent Aimar committed
619
            if( b_drawpicture )
620 621
                msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
                          p_block->i_buffer );
622 623 624
            block_Release( p_block );
            return NULL;
        }
Laurent Aimar's avatar
Laurent Aimar committed
625 626
        else if( i_used > p_block->i_buffer ||
                 p_context->thread_count > 1 )
627
        {
628
            i_used = p_block->i_buffer;
629 630 631
        }

        /* Consumed bytes */
632 633
        p_block->i_buffer -= i_used;
        p_block->p_buffer += i_used;
634 635 636 637 638 639 640 641

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

642 643 644 645 646 647
        /* 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;
        }

648 649 650 651 652 653 654 655 656 657 658 659 660
        /* 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;
661 662 663 664 665 666 667 668 669

                /* 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;
                }
670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704
            }
            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);
            }
        }
705

706
        /* Update frame late count (except when doing preroll) */
707 708
        mtime_t i_display_date = 0;
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
709
            i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
710

711
        if( i_display_date > 0 && i_display_date <= mdate() )
712 713 714 715 716 717 718 719 720 721
        {
            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;
        }

722
        if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
723 724 725 726 727
            continue;

        if( !p_sys->p_ff_pic->opaque )
        {
            /* Get a new picture */
728
            p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
729 730 731 732 733 734 735 736 737 738 739 740 741
            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;
742
            decoder_LinkPicture( p_dec, p_pic );
743 744
        }

Laurent Aimar's avatar
Laurent Aimar committed
745
        if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
746 747
        {
            /* Fetch again the aspect ratio in case it changed */
748
            p_dec->fmt_out.video.i_sar_num
749
                = p_context->sample_aspect_ratio.num;
750
            p_dec->fmt_out.video.i_sar_den
751
                = p_context->sample_aspect_ratio.den;
752

Laurent Aimar's avatar
Laurent Aimar committed
753
            if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
754
            {
Laurent Aimar's avatar
Laurent Aimar committed
755 756
                p_dec->fmt_out.video.i_sar_num = 1;
                p_dec->fmt_out.video.i_sar_den = 1;
757 758 759
            }
        }

760
        /* Send decoded frame to vout */
761
        if( i_pts > VLC_TS_INVALID)
762
        {
763
            p_pic->date = i_pts;
764 765 766 767

            if( p_sys->b_first_frame )
            {
                /* Hack to force display of still pictures */
768 769
                p_sys->b_first_frame = false;
                p_pic->b_force = true;
770 771 772 773 774 775
            }

            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;

776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793
            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;
            }

794 795 796 797
            return p_pic;
        }
        else
        {
798
            decoder_DeletePicture( p_dec, p_pic );
799 800 801 802 803 804 805 806 807 808
        }
    }

    block_Release( p_block );
    return NULL;
}

/*****************************************************************************
 * EndVideo: decoder destruction
 *****************************************************************************
809
 * This function is called when the thread ends after a successful
810 811
 * initialization.
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
812
void EndVideoDec( decoder_t *p_dec )
813 814 815
{
    decoder_sys_t *p_sys = p_dec->p_sys;

Laurent Aimar's avatar
Laurent Aimar committed
816 817
    post_mt( p_sys );

818 819 820
    /* 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 );
821

Laurent Aimar's avatar
Laurent Aimar committed
822 823
    wait_mt( p_sys );

824
    if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
825 826

    if( p_sys->p_va )
827
    {
828
        vlc_va_Delete( p_sys->p_va );
829 830
        p_sys->p_va = NULL;
    }
Laurent Aimar's avatar
Laurent Aimar committed
831
    vlc_sem_destroy( &p_sys->sem_mt );
832 833
}

834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850
/*****************************************************************************
 * 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
851 852
        if( !p )
            return;
853 854 855 856 857 858 859

        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 &&
860
            strncmp( (char*)&p[0x56], "SMI ", 4 ) )
861 862 863 864 865 866 867 868 869 870 871
        {
            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;
                }
872
                if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
873 874 875 876 877 878 879 880 881 882 883 884 885 886 887
                {
                    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
888 889 890 891 892 893 894
        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 );
        }
895 896 897
    }
}

898 899 900 901 902 903 904 905 906
/*****************************************************************************
 * 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;

907 908
    if( p_sys->p_va )
    {
909
        vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
910 911
    }
    else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
912 913 914 915 916
    {
        int i_plane, i_size, i_line;
        uint8_t *p_dst, *p_src;
        int i_src_stride, i_dst_stride;

917
        for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
918
        {
919 920 921 922 923 924 925 926
            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++ )
927
            {
928 929 930
                vlc_memcpy( p_dst, p_src, i_size );
                p_src += i_src_stride;
                p_dst += i_dst_stride;
931 932 933 934 935
            }
        }
    }
    else
    {
936 937 938
        msg_Err( p_dec, "don't know how to convert chroma %i",
                 p_sys->p_context->pix_fmt );
        p_dec->b_error = 1;
939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954
    }
}

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

955
    /* */
956