video.c 36.9 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_codecs.h>                               /* BITMAPINFOHEADER */
35
#include <vlc_avcodec.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
#elif defined(HAVE_FFMPEG_AVCODEC_H)
45
#   include <ffmpeg/avcodec.h>
46 47 48 49
#else
#   include <avcodec.h>
#endif

50
#include "avcodec.h"
51
#include "vaapi.h"
52 53 54 55 56 57

/*****************************************************************************
 * decoder_sys_t : decoder descriptor
 *****************************************************************************/
struct decoder_sys_t
{
58
    FFMPEG_COMMON_MEMBERS
59 60 61 62 63 64 65 66 67

    /* Video decoder specific part */
    mtime_t input_pts;
    mtime_t input_dts;
    mtime_t i_pts;

    AVFrame          *p_ff_pic;

    /* for frame skipping algo */
68
    bool b_hurry_up;
69 70
    enum AVDiscard i_skip_frame;
    enum AVDiscard i_skip_idct;
71 72 73 74 75 76

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

    /* for direct rendering */
77
    bool b_direct_rendering;
78

79
    bool b_has_b_frames;
80 81

    /* Hack to force display of still pictures */
82
    bool b_first_frame;
83

84 85
    /* */
    AVPaletteControl palette;
86 87 88

    /* */
    bool b_flush;
89 90 91

    /* VA API */
    vlc_va_t *p_va;
92 93 94
};

/* FIXME (dummy palette for now) */
hartman's avatar
hartman committed
95
static const AVPaletteControl palette_control;
96 97 98 99

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
100
static void ffmpeg_InitCodec      ( decoder_t * );
101
static int  ffmpeg_OpenCodec      ( decoder_t * );
102 103
static void ffmpeg_CopyPicture    ( decoder_t *, picture_t *, AVFrame * );
static int  ffmpeg_GetFrameBuf    ( struct AVCodecContext *, AVFrame * );
104
static int  ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
105
static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
106
static void ffmpeg_NextPts( decoder_t * );
107

108
#ifdef HAVE_AVCODEC_VAAPI
109 110
static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
                                          const enum PixelFormat * );
111
#endif
112

113 114 115 116 117 118 119 120 121 122 123 124 125 126
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 )
{
127
    decoder_sys_t *p_sys = p_dec->p_sys;
128 129 130 131 132 133 134 135 136

    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 */
    }

137
    if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
138
    {
139 140 141 142
        /* 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;
143
    }
144
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
145 146 147 148 149 150 151 152 153 154 155

    /* If an aspect-ratio was specified in the input format then force it */
    if( p_dec->fmt_in.video.i_aspect )
    {
        p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
    }
    else
    {
        p_dec->fmt_out.video.i_aspect =
            VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
                p_context->width / p_context->height );
156 157
        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;
158

159 160 161 162 163 164 165
        if( p_dec->fmt_out.video.i_aspect == 0 )
        {
            p_dec->fmt_out.video.i_aspect =
                VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
        }
    }

Laurent Aimar's avatar
Laurent Aimar committed
166 167
    if( p_dec->fmt_in.video.i_frame_rate > 0 &&
        p_dec->fmt_in.video.i_frame_rate_base > 0 )
168 169 170 171
    {
        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
172
            p_dec->fmt_in.video.i_frame_rate_base;
173
    }
174
    else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
175 176 177 178
    {
        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;
    }
179

180
    return decoder_NewPicture( p_dec );
181 182 183 184 185 186 187 188
}

/*****************************************************************************
 * 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
189
int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
190
                      AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
191 192
{
    decoder_sys_t *p_sys;
193
    int i_val;
194 195

    /* Allocate the memory needed to store the decoder's structure */
ivoire's avatar
ivoire committed
196
    if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
197
        return VLC_ENOMEM;
198

199 200 201 202
    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;
203
    p_sys->p_ff_pic = avcodec_alloc_frame();
204
    p_sys->b_delayed_open = true;
205
    p_sys->p_va = NULL;
206 207

    /* ***** Fill p_context with init values ***** */
208
    p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
209 210 211 212

    /*  ***** Get configuration of ffmpeg plugin ***** */
    p_sys->p_context->workaround_bugs =
        config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
ivoire's avatar
ivoire committed
213
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 52, 0, 0 )
214 215
    p_sys->p_context->error_resilience =
        config_GetInt( p_dec, "ffmpeg-error-resilience" );
aballier's avatar
aballier committed
216 217 218 219
#else
    p_sys->p_context->error_recognition =
        config_GetInt( p_dec, "ffmpeg-error-resilience" );
#endif
220

221 222
    if( var_CreateGetBool( p_dec, "grayscale" ) )
        p_sys->p_context->flags |= CODEC_FLAG_GRAY;
223

224 225
    i_val = var_CreateGetInteger( p_dec, "ffmpeg-vismv" );
    if( i_val ) p_sys->p_context->debug_mv = i_val;
226

227 228
    i_val = var_CreateGetInteger( p_dec, "ffmpeg-lowres" );
    if( i_val > 0 && i_val <= 2 ) p_sys->p_context->lowres = i_val;
229

230 231 232 233 234
    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;
235

236 237
    if( var_CreateGetBool( p_dec, "ffmpeg-fast" ) )
        p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
238

239
    /* ***** ffmpeg frame skipping ***** */
240
    p_sys->b_hurry_up = var_CreateGetBool( p_dec, "ffmpeg-hurry-up" );
241

242
    switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-frame" ) )
243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262
    {
        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;
    }
263
    p_sys->i_skip_frame = p_sys->p_context->skip_frame;
264

265
    switch( var_CreateGetInteger( p_dec, "ffmpeg-skip-idct" ) )
266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285
    {
        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;
    }
286
    p_sys->i_skip_idct = p_sys->p_context->skip_idct;
287

288
    /* ***** ffmpeg direct rendering ***** */
289
    p_sys->b_direct_rendering = false;
290 291
    if( var_CreateGetBool( p_dec, "ffmpeg-dr" ) &&
       (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
292 293 294 295
        /* Apparently direct rendering doesn't work with YUV422P */
        p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
        /* H264 uses too many reference frames */
        p_sys->i_codec_id != CODEC_ID_H264 &&
296 297
        /* No idea why ... but this fixes flickering on some TSCC streams */
        p_sys->i_codec_id != CODEC_ID_TSCC &&
298 299 300 301
        !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() */
302
        p_sys->b_direct_rendering = true;
303 304 305
    }

    /* ffmpeg doesn't properly release old pictures when frames are skipped */
306
    //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
307 308 309 310 311 312 313 314 315
    if( p_sys->b_direct_rendering )
    {
        msg_Dbg( p_dec, "using direct rendering" );
        p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
    }

    /* Always use our get_buffer wrapper so we can calculate the
     * PTS correctly */
    p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
316
    p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
317 318 319
    p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
    p_sys->p_context->opaque = p_dec;

320
#ifdef HAVE_AVCODEC_VAAPI
321 322
    if( var_CreateGetBool( p_dec, "ffmpeg-hw" ) )
        p_sys->p_context->get_format = ffmpeg_GetFormat;
323
#endif
324

325 326 327
    /* ***** misc init ***** */
    p_sys->input_pts = p_sys->input_dts = 0;
    p_sys->i_pts = 0;
328 329
    p_sys->b_has_b_frames = false;
    p_sys->b_first_frame = true;
330
    p_sys->b_flush = false;
331 332 333 334
    p_sys->i_late_frames = 0;

    /* Set output properties */
    p_dec->fmt_out.i_cat = VIDEO_ES;
335 336
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
    {
337
        /* we are doomed. but not really, because most codecs set their pix_fmt later on */
338
        p_dec->fmt_out.i_codec = VLC_CODEC_I420;
339 340
    }
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
341 342

    /* Setup palette */
343
    memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
344
    if( p_dec->fmt_in.video.p_palette )
345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366
    {
        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;
    }
367
    else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
368 369 370
    {
        p_sys->p_context->palctrl = &p_sys->palette;
    }
371

372 373 374
    /* ***** init this codec with special data ***** */
    ffmpeg_InitCodec( p_dec );

375
    /* ***** Open the codec ***** */
376
    if( ffmpeg_OpenCodec( p_dec ) < 0 )
377 378
    {
        msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
379
        av_free( p_sys->p_ff_pic );
380 381 382 383 384 385 386 387 388 389
        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
390
picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
391 392 393
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    int b_drawpicture;
394
    int b_null_size = false;
395 396
    block_t *p_block;

397 398
    if( !pp_block || !*pp_block )
        return NULL;
399

400
    if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
401
    {
402
        ffmpeg_InitCodec( p_dec );
403 404 405 406 407 408
        if( p_sys->b_delayed_open )
        {
            if( ffmpeg_OpenCodec( p_dec ) )
                msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
        }
    }
409

410
    p_block = *pp_block;
411 412 413 414 415
    if( p_sys->b_delayed_open )
    {
        block_Release( p_block );
        return NULL;
    }
416 417 418 419 420 421 422 423 424

    if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
    {
        p_sys->i_pts = 0; /* To make sure we recover properly */

        p_sys->input_pts = p_sys->input_dts = 0;
        p_sys->i_late_frames = 0;

        block_Release( p_block );
Laurent Aimar's avatar
Laurent Aimar committed
425 426 427

        //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
            //avcodec_flush_buffers( p_sys->p_context );
428 429 430 431 432 433 434 435 436 437 438
        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;
    }

439
    if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
440
        (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463
    {
        if( p_sys->i_pts )
        {
            msg_Err( p_dec, "more than 5 seconds of late video -> "
                     "dropping frame (computer too slow ?)" );
            p_sys->i_pts = 0; /* To make sure we recover properly */
        }
        block_Release( p_block );
        p_sys->i_late_frames--;
        return NULL;
    }

    if( p_block->i_pts > 0 || p_block->i_dts > 0 )
    {
        p_sys->input_pts = p_block->i_pts;
        p_sys->input_dts = p_block->i_dts;

        /* Make sure we don't reuse the same timestamps twice */
        p_block->i_pts = p_block->i_dts = 0;
    }

    /* A good idea could be to decode all I pictures and see for the other */
    if( !p_dec->b_pace_control &&
464 465
        p_sys->b_hurry_up &&
        (p_sys->i_late_frames > 4) )
466 467
    {
        b_drawpicture = 0;
468
        if( p_sys->i_late_frames < 12 )
469
        {
470 471 472
            p_sys->p_context->skip_frame =
                    (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
                    AVDISCARD_BIDIR : p_sys->i_skip_frame;
473 474 475 476 477 478 479 480 481 482 483 484
        }
        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
    {
485
        if( p_sys->b_hurry_up )
486
            p_sys->p_context->skip_frame = p_sys->i_skip_frame;
Laurent Aimar's avatar
Laurent Aimar committed
487
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
488 489 490 491 492 493 494
            b_drawpicture = 1;
        else
            b_drawpicture = 0;
    }

    if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
    {
495
        if( p_sys->b_hurry_up )
496
            p_sys->p_context->skip_frame = p_sys->i_skip_frame;
497
        b_null_size = true;
498
    }
Laurent Aimar's avatar
Laurent Aimar committed
499 500
    else if( !b_drawpicture )
    {
501 502 503
        /* It creates broken picture
         * FIXME either our parser or ffmpeg is broken */
#if 0
504 505 506
        if( p_sys->b_hurry_up )
            p_sys->p_context->skip_frame = __MAX( p_sys->p_context->skip_frame,
                                                  AVDISCARD_NONREF );
507
#endif
Laurent Aimar's avatar
Laurent Aimar committed
508
    }
509 510 511 512 513 514 515 516 517

    /*
     * Do the actual decoding now
     */

    /* Don't forget that ffmpeg requires a little more bytes
     * that the real frame size */
    if( p_block->i_buffer > 0 )
    {
518 519
        p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;

520 521 522
        p_block = block_Realloc( p_block, 0,
                            p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
        if( !p_block )
ivoire's avatar
ivoire committed
523
            return NULL;
524
        p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
525
        *pp_block = p_block;
526
        memset( p_block->p_buffer + p_block->i_buffer, 0,
527 528 529
                FF_INPUT_BUFFER_PADDING_SIZE );
    }

530
    while( p_block->i_buffer > 0 || p_sys->b_flush )
531 532 533 534 535 536
    {
        int i_used, b_gotpicture;
        picture_t *p_pic;

        i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
                                       &b_gotpicture,
537
                                       p_block->i_buffer <= 0 && p_sys->b_flush ? NULL : p_block->p_buffer, p_block->i_buffer );
538

539
        if( b_null_size && p_sys->p_context->width > 0 &&
540 541
            p_sys->p_context->height > 0 &&
            !p_sys->b_flush )
542 543
        {
            /* Reparse it to not drop the I frame */
544
            b_null_size = false;
545
            if( p_sys->b_hurry_up )
546
                p_sys->p_context->skip_frame = p_sys->i_skip_frame;
547
            i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
548 549
                                           &b_gotpicture, p_block->p_buffer,
                                           p_block->i_buffer );
550 551
        }

552 553 554
        if( p_sys->b_flush )
            p_sys->b_first_frame = true;

555
        if( p_block->i_buffer <= 0 )
556 557
            p_sys->b_flush = false;

558 559
        if( i_used < 0 )
        {
Laurent Aimar's avatar
Laurent Aimar committed
560
            if( b_drawpicture )
561 562
                msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
                          p_block->i_buffer );
563 564 565
            block_Release( p_block );
            return NULL;
        }
566
        else if( i_used > p_block->i_buffer )
567
        {
568
            i_used = p_block->i_buffer;
569 570 571
        }

        /* Consumed bytes */
572 573
        p_block->i_buffer -= i_used;
        p_block->p_buffer += i_used;
574 575 576 577 578 579 580 581

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

582 583 584 585
        /* Set the PTS */
        if( p_sys->p_ff_pic->pts )
            p_sys->i_pts = p_sys->p_ff_pic->pts;

586
        /* Update frame late count (except when doing preroll) */
587 588 589
        mtime_t i_display_date = 0;
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
            i_display_date = decoder_GetDisplayDate( p_dec, p_sys->i_pts );
590

591
        if( i_display_date > 0 && i_display_date <= mdate() )
592 593 594 595 596 597 598 599 600 601
        {
            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;
        }

602
        if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
603 604
        {
            /* Do not display the picture */
Laurent Aimar's avatar
Laurent Aimar committed
605 606
            p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
            if( !b_drawpicture && p_pic )
607
                decoder_DeletePicture( p_dec, p_pic );
608

609
            ffmpeg_NextPts( p_dec );
610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631
            continue;
        }

        if( !p_sys->p_ff_pic->opaque )
        {
            /* Get a new picture */
            p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
            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;
        }

632
        /* Sanity check (seems to be needed for some streams) */
633 634
        if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
        {
635
            p_sys->b_has_b_frames = true;
636 637
        }

638 639 640 641 642 643 644 645 646 647 648
        if( !p_dec->fmt_in.video.i_aspect )
        {
            /* Fetch again the aspect ratio in case it changed */
            p_dec->fmt_out.video.i_aspect =
                VOUT_ASPECT_FACTOR
                    * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
                    * p_sys->p_context->width / p_sys->p_context->height );
            p_dec->fmt_out.video.i_sar_num
                = p_sys->p_context->sample_aspect_ratio.num;
            p_dec->fmt_out.video.i_sar_den
                = p_sys->p_context->sample_aspect_ratio.den;
649

650 651 652 653 654 655 656
            if( p_dec->fmt_out.video.i_aspect == 0 )
            {
                p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
                    * p_sys->p_context->width / p_sys->p_context->height;
            }
        }

657 658 659 660 661
        /* Send decoded frame to vout */
        if( p_sys->i_pts )
        {
            p_pic->date = p_sys->i_pts;

662
            ffmpeg_NextPts( p_dec );
663 664 665 666

            if( p_sys->b_first_frame )
            {
                /* Hack to force display of still pictures */
667 668
                p_sys->b_first_frame = false;
                p_pic->b_force = true;
669 670 671 672 673 674
            }

            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;

675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692
            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;
            }

693 694 695 696
            return p_pic;
        }
        else
        {
697
            decoder_DeletePicture( p_dec, p_pic );
698 699 700 701 702 703 704 705 706 707
        }
    }

    block_Release( p_block );
    return NULL;
}

/*****************************************************************************
 * EndVideo: decoder destruction
 *****************************************************************************
708
 * This function is called when the thread ends after a successful
709 710
 * initialization.
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
711
void EndVideoDec( decoder_t *p_dec )
712 713 714
{
    decoder_sys_t *p_sys = p_dec->p_sys;

715 716
    avcodec_flush_buffers( p_sys->p_context );

717
    if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
718 719 720

    if( p_sys->p_va )
        VaDelete( p_sys->p_va );
721 722
}

723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739
/*****************************************************************************
 * 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
740 741
        if( !p )
            return;
742 743 744 745 746 747 748

        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 &&
749
            strncmp( (char*)&p[0x56], "SMI ", 4 ) )
750 751 752 753 754 755 756 757 758 759 760
        {
            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;
                }
761
                if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
762 763 764 765 766 767 768 769 770 771 772 773 774 775 776
                {
                    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
777 778 779 780 781 782 783
        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 );
        }
784 785 786
    }
}

787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806
/*****************************************************************************
 * 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;
Laurent Aimar's avatar
Laurent Aimar committed
807
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(52, 0, 0)
808 809 810 811 812
    p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
#else
    p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
#endif

813 814 815 816 817
    int ret;
    vlc_avcodec_lock();
    ret = avcodec_open( p_sys->p_context, p_sys->p_codec );
    vlc_avcodec_unlock();
    if( ret < 0 )
818 819 820 821 822
        return VLC_EGENERIC;
    msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );

    p_sys->b_delayed_open = false;

823 824 825 826 827 828 829 830
    if( p_sys->p_va )
    {
        char psz_version[128];

        VaVersion( p_sys->p_va, psz_version, sizeof(psz_version) );
        msg_Info( p_dec, "Using VA API version %s for hardware decoding.", psz_version );
    }

831 832
    return VLC_SUCCESS;
}
833 834 835 836 837 838 839 840 841
/*****************************************************************************
 * 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;

842 843 844 845 846
    if( p_sys->p_va )
    {
        VaExtract( p_sys->p_va, p_pic, p_ff_pic );
    }
    else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
847 848 849 850 851
    {
        int i_plane, i_size, i_line;
        uint8_t *p_dst, *p_src;
        int i_src_stride, i_dst_stride;

852
        for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
853
        {
854 855 856 857 858 859 860 861
            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++ )
862
            {
863 864 865
                vlc_memcpy( p_dst, p_src, i_size );
                p_src += i_src_stride;
                p_dst += i_dst_stride;
866 867 868 869 870
            }
        }
    }
    else
    {
871 872 873
        msg_Err( p_dec, "don't know how to convert chroma %i",
                 p_sys->p_context->pix_fmt );
        p_dec->b_error = 1;
874 875 876 877 878 879 880 881 882
    }
}

/*****************************************************************************
 * 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).
 *****************************************************************************/
883 884
static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );

885 886 887 888 889 890 891 892
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;

    /* Set picture PTS */
893
    ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
894

895
    /* */
896 897 898 899
    p_ff_pic->opaque = NULL;

    if( p_sys->p_va )
    {
900 901
#ifdef HAVE_AVCODEC_VAAPI
        /* hwaccel_context is not present in old fffmpeg version */
902 903 904 905 906 907 908
        if( VaSetup( 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 ) )
        {
            msg_Err( p_dec, "VaSetup failed" );
            return -1;
        }
909 910 911
#else
        assert(0);
#endif
912 913 914 915 916

        /* */
        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
917

918 919 920 921 922 923 924 925
        if( VaGrabSurface( p_sys->p_va, p_ff_pic ) )
        {
            msg_Err( p_dec, "VaGrabSurface failed" );
            return -1;
        }
        return 0;
    }
    else if( !p_sys->b_direct_rendering )
926
    {
927
        /* Not much to do in indirect rendering mode */
928 929 930 931
        return avcodec_default_get_buffer( p_context, p_ff_pic );
    }

    /* Some codecs set pix_fmt only after the 1st frame has been decoded,
932 933 934 935 936 937
     * so we need to check for direct rendering again. */

    int i_width = p_sys->p_context->width;
    int i_height = p_sys->p_context->height;
    avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );

938
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
939 940
        p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
        /* We only pad picture up to 16 */
941 942
        PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
        p_context->pix_fmt == PIX_FMT_PAL8 )
943
        return avcodec_default_get_buffer( p_context, p_ff_pic );
944

945
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
946 947 948 949 950

    /* Get a new picture */
    p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
    if( !p_pic )
        return avcodec_default_get_buffer( p_context, p_ff_pic );
951

952 953 954 955 956 957 958 959 960 961 962 963 964 965
    p_sys->p_context->draw_horiz_band = NULL;

    p_ff_pic->opaque = (void*)p_pic;
    p_ff_pic->type = FF_BUFFER_TYPE_USER;
    p_ff_pic->data[0] = p_pic->p[0].p_pixels;
    p_ff_pic->data[1] = p_pic->p[1].p_pixels;
    p_ff_pic->data[2] = p_pic->p[2].p_pixels;
    p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */

    p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
    p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
    p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
    p_ff_pic->linesize[3] = 0;

966
    decoder_LinkPicture( p_dec, p_pic );
967 968 969 970 971 972

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

    return 0;
}
973 974 975
static int  ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
{
    decoder_t *p_dec = (decoder_t *)p_context->opaque;
976
    int i_ret;
977

978 979
    /* */
    p_ff_pic->pts = AV_NOPTS_VALUE;
980 981

    /* We always use default reget function, it works perfectly fine */
982 983 984 985 986 987 988 989
    i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );

    /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
     * ffmpeg_GetFrameBuf call) */
    if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
        ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );

    return i_ret;
990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009
}

static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    /* Set picture PTS */
    if( p_sys->input_pts )
    {
        p_ff_pic->pts = p_sys->input_pts;
    }
    else if( p_sys->input_dts )
    {
        /* Some demuxers only set the dts so let's try to find a useful
         * timestamp from this */
        if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
            !p_ff_pic->reference || !p_sys->i_pts )
        {
            p_ff_pic->pts = p_sys->input_dts;
        }
1010 1011 1012 1013 1014 1015 1016 1017
        else
        {
            p_ff_pic->pts = 0;
        }
    }
    else
    {
        p_ff_pic->pts = 0;
1018 1019 1020 1021 1022 1023 1024
    }

    if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
    {
        p_sys->input_pts = p_sys->input_dts = 0;
    }
}
1025 1026 1027 1028 1029

static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
                                    AVFrame *p_ff_pic )
{
    decoder_t *p_dec = (decoder_t *)p_context->opaque;
1030 1031 1032 1033 1034
    decoder_sys_t *p_sys = p_dec->p_sys;

    if( p_sys->p_va )
    {
        VaUngrabSurface( p_sys->p_va, p_ff_pic );
1035

1036 1037 1038 1039 1040
        /* */
        for( int i = 0; i < 4; i++ )
            p_ff_pic->data[i] = NULL;
    }
    else if( !p_ff_pic->opaque )
1041 1042 1043
    {
        avcodec_default_release_buffer( p_context, p_ff_pic );
    }
1044 1045 1046
    else
    {
        picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1047

1048
        decoder_UnlinkPicture( p_dec, p_pic );
1049

1050 1051 1052