video.c 40 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
Laurent Aimar's avatar
Laurent Aimar committed
58 59 60
#if defined(FF_THREAD_FRAME)
#   define HAVE_AVCODEC_MT
#endif
61 62 63 64 65 66

/*****************************************************************************
 * decoder_sys_t : decoder descriptor
 *****************************************************************************/
struct decoder_sys_t
{
67
    FFMPEG_COMMON_MEMBERS
68 69 70 71 72 73 74

    /* Video decoder specific part */
    mtime_t i_pts;

    AVFrame          *p_ff_pic;

    /* for frame skipping algo */
75
    bool b_hurry_up;
76 77
    enum AVDiscard i_skip_frame;
    enum AVDiscard i_skip_idct;
78 79 80 81 82 83

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

    /* for direct rendering */
84
    bool b_direct_rendering;
85
    int  i_direct_rendering_used;
86

87
    bool b_has_b_frames;
88 89

    /* Hack to force display of still pictures */
90
    bool b_first_frame;
91

92 93
    /* */
    AVPaletteControl palette;
94 95 96

    /* */
    bool b_flush;
97 98 99

    /* VA API */
    vlc_va_t *p_va;
Laurent Aimar's avatar
Laurent Aimar committed
100 101

    vlc_sem_t sem_mt;
102 103
};

Laurent Aimar's avatar
Laurent Aimar committed
104 105 106 107 108 109 110 111
#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

112
/* FIXME (dummy palette for now) */
hartman's avatar
hartman committed
113
static const AVPaletteControl palette_control;
114 115 116 117

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
118
static void ffmpeg_InitCodec      ( decoder_t * );
119
static int  ffmpeg_OpenCodec      ( decoder_t * );
120 121
static void ffmpeg_CopyPicture    ( decoder_t *, picture_t *, AVFrame * );
static int  ffmpeg_GetFrameBuf    ( struct AVCodecContext *, AVFrame * );
122
static int  ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
123 124
static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );

125
#ifdef HAVE_AVCODEC_VA
126 127
static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
                                          const enum PixelFormat * );
128
#endif
129

130 131 132 133 134 135 136 137 138 139 140 141 142 143
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 )
{
144
    decoder_sys_t *p_sys = p_dec->p_sys;
145 146 147 148 149 150 151 152 153

    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 */
    }

154
    if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
155
    {
156 157 158 159
        /* 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;
160
    }
161
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
162 163

    /* If an aspect-ratio was specified in the input format then force it */
Laurent Aimar's avatar
Laurent Aimar committed
164
    if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
165
    {
Laurent Aimar's avatar
Laurent Aimar committed
166 167
        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;
168 169 170
    }
    else
    {
171 172
        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;
173

Laurent Aimar's avatar
Laurent Aimar committed
174
        if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
175
        {
Laurent Aimar's avatar
Laurent Aimar committed
176 177
            p_dec->fmt_out.video.i_sar_num = 1;
            p_dec->fmt_out.video.i_sar_den = 1;
178 179 180
        }
    }

Laurent Aimar's avatar
Laurent Aimar committed
181 182
    if( p_dec->fmt_in.video.i_frame_rate > 0 &&
        p_dec->fmt_in.video.i_frame_rate_base > 0 )
183 184 185 186
    {
        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
187
            p_dec->fmt_in.video.i_frame_rate_base;
188
    }
189
    else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
190 191 192 193
    {
        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;
    }
194

195
    return decoder_NewPicture( p_dec );
196 197 198 199 200 201 202 203
}

/*****************************************************************************
 * 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
204
int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
205
                      AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
206 207
{
    decoder_sys_t *p_sys;
208
    int i_val;
209 210

    /* Allocate the memory needed to store the decoder's structure */
ivoire's avatar
ivoire committed
211
    if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
212
        return VLC_ENOMEM;
213

214 215 216
    p_codec->type = CODEC_TYPE_VIDEO;
    p_context->codec_type = CODEC_TYPE_VIDEO;
    p_context->codec_id = i_codec_id;
217 218 219 220
    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;
221
    p_sys->p_ff_pic = avcodec_alloc_frame();
222
    p_sys->b_delayed_open = true;
223
    p_sys->p_va = NULL;
Laurent Aimar's avatar
Laurent Aimar committed
224
    vlc_sem_init( &p_sys->sem_mt, 0 );
225 226

    /* ***** Fill p_context with init values ***** */
227
    p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
228 229 230

    /*  ***** Get configuration of ffmpeg plugin ***** */
    p_sys->p_context->workaround_bugs =
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
231
        var_InheritInteger( p_dec, "ffmpeg-workaround-bugs" );
aballier's avatar
aballier committed
232
    p_sys->p_context->error_recognition =
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
233
        var_InheritInteger( p_dec, "ffmpeg-error-resilience" );
234

235 236
    if( var_CreateGetBool( p_dec, "grayscale" ) )
        p_sys->p_context->flags |= CODEC_FLAG_GRAY;
237

238 239
    i_val = var_CreateGetInteger( p_dec, "ffmpeg-vismv" );
    if( i_val ) p_sys->p_context->debug_mv = i_val;
240

241 242
    i_val = var_CreateGetInteger( p_dec, "ffmpeg-lowres" );
    if( i_val > 0 && i_val <= 2 ) p_sys->p_context->lowres = i_val;
243

244 245 246 247 248
    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;
249

250 251
    if( var_CreateGetBool( p_dec, "ffmpeg-fast" ) )
        p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
252

253
    /* ***** ffmpeg frame skipping ***** */
254
    p_sys->b_hurry_up = var_CreateGetBool( p_dec, "ffmpeg-hurry-up" );
255

256
    switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-frame" ) )
257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276
    {
        case -1:
            p_sys->p_context->skip_frame = AVDISCARD_NONE;
            break;
        case 0:
            p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
            break;
        case 1:
            p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
            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;
    }
277
    p_sys->i_skip_frame = p_sys->p_context->skip_frame;
278

279
    switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-idct" ) )
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299
    {
        case -1:
            p_sys->p_context->skip_idct = AVDISCARD_NONE;
            break;
        case 0:
            p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
            break;
        case 1:
            p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
            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;
    }
300
    p_sys->i_skip_idct = p_sys->p_context->skip_idct;
301

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

    /* ffmpeg doesn't properly release old pictures when frames are skipped */
317
    //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
318 319
    if( p_sys->b_direct_rendering )
    {
320
        msg_Dbg( p_dec, "trying to use direct rendering" );
321 322
        p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
    }
323 324 325 326
    else
    {
        msg_Dbg( p_dec, "direct rendering is disabled" );
    }
327 328 329 330

    /* Always use our get_buffer wrapper so we can calculate the
     * PTS correctly */
    p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
331
    p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
332 333 334
    p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
    p_sys->p_context->opaque = p_dec;

Laurent Aimar's avatar
Laurent Aimar committed
335 336 337 338
#ifdef HAVE_AVCODEC_MT
    int i_thread_count = var_InheritInteger( p_dec, "ffmpeg-threads" );
    if( i_thread_count <= 0 )
        i_thread_count = vlc_GetCPUCount();
339 340 341 342
    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
343
#ifdef HAVE_AVCODEC_VA
344
    const bool b_use_hw = var_CreateGetBool( p_dec, "ffmpeg-hw" );
Laurent Aimar's avatar
Laurent Aimar committed
345 346
    if( b_use_hw )
    {
347 348 349 350
#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
351
#endif
352
    }
Laurent Aimar's avatar
Laurent Aimar committed
353 354
#endif

355
    /* ***** misc init ***** */
356
    p_sys->i_pts = VLC_TS_INVALID;
357 358
    p_sys->b_has_b_frames = false;
    p_sys->b_first_frame = true;
359
    p_sys->b_flush = false;
360 361 362 363
    p_sys->i_late_frames = 0;

    /* Set output properties */
    p_dec->fmt_out.i_cat = VIDEO_ES;
364 365
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
    {
366
        /* we are doomed. but not really, because most codecs set their pix_fmt later on */
367
        p_dec->fmt_out.i_codec = VLC_CODEC_I420;
368 369
    }
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
370 371

    /* Setup palette */
372
    memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
373
    if( p_dec->fmt_in.video.p_palette )
374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395
    {
        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;
    }
396
    else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
397 398 399
    {
        p_sys->p_context->palctrl = &p_sys->palette;
    }
400

401 402 403
    /* ***** init this codec with special data ***** */
    ffmpeg_InitCodec( p_dec );

404
    /* ***** Open the codec ***** */
405
    if( ffmpeg_OpenCodec( p_dec ) < 0 )
406 407
    {
        msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
408
        av_free( p_sys->p_ff_pic );
Laurent Aimar's avatar
Laurent Aimar committed
409
        vlc_sem_destroy( &p_sys->sem_mt );
410 411 412 413 414 415 416 417 418 419
        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
420
picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
421 422
{
    decoder_sys_t *p_sys = p_dec->p_sys;
423
    AVCodecContext *p_context = p_sys->p_context;
424
    int b_drawpicture;
425
    int b_null_size = false;
426 427
    block_t *p_block;

428 429
    if( !pp_block || !*pp_block )
        return NULL;
430

431
    if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
432
    {
433
        ffmpeg_InitCodec( p_dec );
434 435 436 437 438 439
        if( p_sys->b_delayed_open )
        {
            if( ffmpeg_OpenCodec( p_dec ) )
                msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
        }
    }
440

441
    p_block = *pp_block;
442 443 444 445 446
    if( p_sys->b_delayed_open )
    {
        block_Release( p_block );
        return NULL;
    }
447 448 449

    if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
    {
450
        p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
451 452 453

        p_sys->i_late_frames = 0;

454 455
        if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
            avcodec_flush_buffers( p_context );
Laurent Aimar's avatar
Laurent Aimar committed
456

457
        block_Release( p_block );
458 459 460 461 462 463 464 465 466 467 468
        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;
    }

469
    if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
470
        (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
471
    {
472
        if( p_sys->i_pts > VLC_TS_INVALID )
473 474 475
        {
            msg_Err( p_dec, "more than 5 seconds of late video -> "
                     "dropping frame (computer too slow ?)" );
476
            p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
477 478 479 480 481 482 483 484
        }
        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 &&
485 486
        p_sys->b_hurry_up &&
        (p_sys->i_late_frames > 4) )
487 488
    {
        b_drawpicture = 0;
489
        if( p_sys->i_late_frames < 12 )
490
        {
491
            p_context->skip_frame =
492 493
                    (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
                    AVDISCARD_BIDIR : p_sys->i_skip_frame;
494 495 496 497 498 499 500 501 502 503 504 505
        }
        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
    {
506
        if( p_sys->b_hurry_up )
507
            p_context->skip_frame = p_sys->i_skip_frame;
Laurent Aimar's avatar
Laurent Aimar committed
508
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
509 510 511 512 513
            b_drawpicture = 1;
        else
            b_drawpicture = 0;
    }

514
    if( p_context->width <= 0 || p_context->height <= 0 )
515
    {
516
        if( p_sys->b_hurry_up )
517
            p_context->skip_frame = p_sys->i_skip_frame;
518
        b_null_size = true;
519
    }
Laurent Aimar's avatar
Laurent Aimar committed
520 521
    else if( !b_drawpicture )
    {
522 523 524
        /* It creates broken picture
         * FIXME either our parser or ffmpeg is broken */
#if 0
525
        if( p_sys->b_hurry_up )
526
            p_context->skip_frame = __MAX( p_context->skip_frame,
527
                                                  AVDISCARD_NONREF );
528
#endif
Laurent Aimar's avatar
Laurent Aimar committed
529
    }
530 531

    /*
532
     * Do the actual decoding now */
533 534 535 536 537

    /* Don't forget that ffmpeg requires a little more bytes
     * that the real frame size */
    if( p_block->i_buffer > 0 )
    {
538 539
        p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;

540 541 542
        p_block = block_Realloc( p_block, 0,
                            p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
        if( !p_block )
ivoire's avatar
ivoire committed
543
            return NULL;
544
        p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
545
        *pp_block = p_block;
546
        memset( p_block->p_buffer + p_block->i_buffer, 0,
547 548 549
                FF_INPUT_BUFFER_PADDING_SIZE );
    }

550
    while( p_block->i_buffer > 0 || p_sys->b_flush )
551 552 553 554
    {
        int i_used, b_gotpicture;
        picture_t *p_pic;

555 556 557 558 559 560 561
        /* 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;
562
        p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
563 564 565 566 567

        /* 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
568
        post_mt( p_sys );
569 570

        i_used = avcodec_decode_video( p_context, p_sys->p_ff_pic,
571
                                       &b_gotpicture,
572
                                       p_block->i_buffer <= 0 && p_sys->b_flush ? NULL : p_block->p_buffer, p_block->i_buffer );
573

574 575
        if( b_null_size && !p_sys->b_flush &&
            p_context->width > 0 && p_context->height > 0 )
576 577
        {
            /* Reparse it to not drop the I frame */
578
            b_null_size = false;
579
            if( p_sys->b_hurry_up )
580 581
                p_context->skip_frame = p_sys->i_skip_frame;
            i_used = avcodec_decode_video( p_context, p_sys->p_ff_pic,
582 583
                                           &b_gotpicture, p_block->p_buffer,
                                           p_block->i_buffer );
584
        }
Laurent Aimar's avatar
Laurent Aimar committed
585
        wait_mt( p_sys );
586

587 588 589
        if( p_sys->b_flush )
            p_sys->b_first_frame = true;

590
        if( p_block->i_buffer <= 0 )
591 592
            p_sys->b_flush = false;

593 594
        if( i_used < 0 )
        {
Laurent Aimar's avatar
Laurent Aimar committed
595
            if( b_drawpicture )
596 597
                msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
                          p_block->i_buffer );
598 599 600
            block_Release( p_block );
            return NULL;
        }
Laurent Aimar's avatar
Laurent Aimar committed
601 602
        else if( i_used > p_block->i_buffer ||
                 p_context->thread_count > 1 )
603
        {
604
            i_used = p_block->i_buffer;
605 606 607
        }

        /* Consumed bytes */
608 609
        p_block->i_buffer -= i_used;
        p_block->p_buffer += i_used;
610 611 612 613 614 615 616 617

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

618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669
        /* 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;
            }
            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 )
            {
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52,20,0)
                int i_tick = p_context->ticks_per_frame;
                if( i_tick <= 0 )
                    i_tick = 1;
#else
                int i_tick = 1;
#endif

                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);
            }
        }
670

671
        /* Update frame late count (except when doing preroll) */
672 673
        mtime_t i_display_date = 0;
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
674
            i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
675

676
        if( i_display_date > 0 && i_display_date <= mdate() )
677 678 679 680 681 682 683 684 685 686
        {
            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;
        }

687
        if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
688 689 690 691 692
            continue;

        if( !p_sys->p_ff_pic->opaque )
        {
            /* Get a new picture */
693
            p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
694 695 696 697 698 699 700 701 702 703 704 705 706
            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;
707
            decoder_LinkPicture( p_dec, p_pic );
708 709
        }

710
        /* Sanity check (seems to be needed for some streams) */
711 712
        if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
        {
713
            p_sys->b_has_b_frames = true;
714 715
        }

Laurent Aimar's avatar
Laurent Aimar committed
716
        if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
717 718
        {
            /* Fetch again the aspect ratio in case it changed */
719
            p_dec->fmt_out.video.i_sar_num
720
                = p_context->sample_aspect_ratio.num;
721
            p_dec->fmt_out.video.i_sar_den
722
                = p_context->sample_aspect_ratio.den;
723

Laurent Aimar's avatar
Laurent Aimar committed
724
            if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
725
            {
Laurent Aimar's avatar
Laurent Aimar committed
726 727
                p_dec->fmt_out.video.i_sar_num = 1;
                p_dec->fmt_out.video.i_sar_den = 1;
728 729 730
            }
        }

731
        /* Send decoded frame to vout */
732
        if( i_pts > VLC_TS_INVALID)
733
        {
734
            p_pic->date = i_pts;
735 736 737 738

            if( p_sys->b_first_frame )
            {
                /* Hack to force display of still pictures */
739 740
                p_sys->b_first_frame = false;
                p_pic->b_force = true;
741 742 743 744 745 746
            }

            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;

747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764
            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;
            }

765 766 767 768
            return p_pic;
        }
        else
        {
769
            decoder_DeletePicture( p_dec, p_pic );
770 771 772 773 774 775 776 777 778 779
        }
    }

    block_Release( p_block );
    return NULL;
}

/*****************************************************************************
 * EndVideo: decoder destruction
 *****************************************************************************
780
 * This function is called when the thread ends after a successful
781 782
 * initialization.
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
783
void EndVideoDec( decoder_t *p_dec )
784 785 786
{
    decoder_sys_t *p_sys = p_dec->p_sys;

Laurent Aimar's avatar
Laurent Aimar committed
787 788
    post_mt( p_sys );

789 790 791
    /* 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 );
792

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

795
    if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
796 797

    if( p_sys->p_va )
798
        vlc_va_Delete( p_sys->p_va );
Laurent Aimar's avatar
Laurent Aimar committed
799
    vlc_sem_destroy( &p_sys->sem_mt );
800 801
}

802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818
/*****************************************************************************
 * 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
819 820
        if( !p )
            return;
821 822 823 824 825 826 827

        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 &&
828
            strncmp( (char*)&p[0x56], "SMI ", 4 ) )
829 830 831 832 833 834 835 836 837 838 839
        {
            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;
                }
840
                if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
841 842 843 844 845 846 847 848 849 850 851 852 853 854 855
                {
                    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
856 857 858 859 860 861 862
        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 );
        }
863 864 865
    }
}

866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887
/*****************************************************************************
 * ffmpeg_OpenCodec:
 *****************************************************************************/
static int ffmpeg_OpenCodec( decoder_t *p_dec )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    if( p_sys->p_context->extradata_size <= 0 )
    {
        if( p_sys->i_codec_id == CODEC_ID_VC1 ||
            p_sys->i_codec_id == CODEC_ID_VORBIS ||
            p_sys->i_codec_id == CODEC_ID_THEORA )
        {
            msg_Warn( p_dec, "waiting for extra data for codec %s",
                      p_sys->psz_namecodec );
            return 1;
        }
    }
    p_sys->p_context->width  = p_dec->fmt_in.video.i_width;
    p_sys->p_context->height = p_dec->fmt_in.video.i_height;
    p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;

888 889 890 891 892
    int ret;
    vlc_avcodec_lock();
    ret = avcodec_open( p_sys->p_context, p_sys->p_codec );
    vlc_avcodec_unlock();
    if( ret < 0 )
893 894
        return VLC_EGENERIC;
    msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
Laurent Aimar's avatar
Laurent Aimar committed
895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915
#ifdef HAVE_AVCODEC_MT
    switch( p_sys->p_context->active_thread_type )
    {
    case FF_THREAD_FRAME:
        msg_Dbg( p_dec, "using frame thread mode with %d threads",
                 p_sys->p_context->thread_count );
        break;
    case FF_THREAD_SLICE:
        msg_Dbg( p_dec, "using slice thread mode with %d threads",
                 p_sys->p_context->thread_count );
        break;
    case 0:
        if( p_sys->p_context->thread_count > 1 )
            msg_Warn( p_dec, "failed to enable threaded decoding" );
        break;
    default:
        msg_Warn( p_dec, "using unknown thread mode with %d threads",
                  p_sys->p_context->thread_count );
        break;
    }
#endif
916 917 918 919 920

    p_sys->b_delayed_open = false;

    return VLC_SUCCESS;
}
921 922 923 924 925 926 927 928 929
/*****************************************************************************
 * 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;

930 931
    if( p_sys->p_va )
    {
932
        vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
933 934
    }
    else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
935 936 937 938 939
    {
        int i_plane, i_size, i_line;
        uint8_t *p_dst, *p_src;
        int i_src_stride, i_dst_stride;

940
        for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
941
        {
942 943 944 945 946 947 948 949
            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++ )
950
            {
951 952 953
                vlc_memcpy( p_dst, p_src, i_size );
                p_src += i_src_stride;
                p_dst += i_dst_stride;
954 955 956 957 958
            }
        }
    }
    else
    {
959 960 961
        msg_Err( p_dec, "don't know how to convert chroma %i",
                 p_sys->p_context->pix_fmt );
        p_dec->b_error = 1;
962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977
    }
}

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

978
    /* */
979
    p_ff_pic->reordered_opaque = p_context->reordered_opaque;
980 981 982 983
    p_ff_pic->opaque = NULL;

    if( p_sys->p_va )
    {
984
#ifdef HAVE_AVCODEC_VA
985
        /* hwaccel_context is not present in old fffmpeg version */