video.c 43 KB
Newer Older
1
/*****************************************************************************
2
 * video.c: video decoder using the libavcodec library
3
 *****************************************************************************
Jean-Baptiste Kempf's avatar
LGPL  
Jean-Baptiste Kempf committed
4
 * Copyright (C) 1999-2001 VLC authors and VideoLAN
5 6 7 8 9
 * $Id$
 *
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
 *          Gildas Bazin <gbazin@videolan.org>
 *
Jean-Baptiste Kempf's avatar
LGPL  
Jean-Baptiste Kempf committed
10 11 12
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
13 14 15 16
 * (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
Jean-Baptiste Kempf's avatar
LGPL  
Jean-Baptiste Kempf committed
17 18
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
19
 *
Jean-Baptiste Kempf's avatar
LGPL  
Jean-Baptiste Kempf committed
20 21 22
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software 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
#include <libavcodec/avcodec.h>
39
#include <libavutil/mem.h>
40
#include <libavutil/pixdesc.h>
41

42
#include "avcodec.h"
43
#include "va.h"
44 45 46 47 48 49

/*****************************************************************************
 * decoder_sys_t : decoder descriptor
 *****************************************************************************/
struct decoder_sys_t
{
50
    AVCODEC_COMMON_MEMBERS
51 52 53 54 55 56 57

    /* Video decoder specific part */
    mtime_t i_pts;

    AVFrame          *p_ff_pic;

    /* for frame skipping algo */
58
    bool b_hurry_up;
59 60
    enum AVDiscard i_skip_frame;
    enum AVDiscard i_skip_idct;
61 62 63 64 65 66

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

    /* for direct rendering */
67
    bool b_direct_rendering;
68
    int  i_direct_rendering_used;
69

70
    bool b_has_b_frames;
71 72

    /* Hack to force display of still pictures */
73
    bool b_first_frame;
74

75

76
    /* */
77
    bool palette_sent;
78 79 80

    /* */
    bool b_flush;
81 82 83

    /* VA API */
    vlc_va_t *p_va;
Laurent Aimar's avatar
Laurent Aimar committed
84 85

    vlc_sem_t sem_mt;
86 87
};

Laurent Aimar's avatar
Laurent Aimar committed
88 89 90 91 92 93 94 95
#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

96 97 98
/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
99
static void ffmpeg_InitCodec      ( decoder_t * );
100
static void ffmpeg_CopyPicture    ( decoder_t *, picture_t *, AVFrame * );
101 102 103
#if LIBAVCODEC_VERSION_MAJOR >= 55
static int lavc_GetFrame(struct AVCodecContext *, AVFrame *, int);
#else
104 105
static int  ffmpeg_GetFrameBuf    ( struct AVCodecContext *, AVFrame * );
static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
106
#endif
107 108 109
static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
                                          const enum PixelFormat * );

110 111 112 113 114 115 116 117 118 119 120 121 122 123
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 )
{
124
    decoder_sys_t *p_sys = p_dec->p_sys;
125 126
    int width = p_context->coded_width;
    int height = p_context->coded_height;
127

128 129 130 131 132 133
    if( p_sys->p_va == NULL )
    {
        int aligns[AV_NUM_DATA_POINTERS];

        avcodec_align_dimensions2(p_context, &width, &height, aligns);
    }
134 135


136 137 138 139 140
    if( width == 0 || height == 0 || width > 8192 || height > 8192 )
    {
        msg_Err( p_dec, "Invalid frame size %dx%d.", width, height );
        return NULL; /* invalid display size */
    }
141 142 143 144
    p_dec->fmt_out.video.i_width = width;
    p_dec->fmt_out.video.i_height = height;

    if( width != p_context->width || height != p_context->height )
145 146 147 148
    {
        p_dec->fmt_out.video.i_visible_width = p_context->width;
        p_dec->fmt_out.video.i_visible_height = p_context->height;
    }
149 150 151 152 153
    else
    {
        p_dec->fmt_out.video.i_visible_width = width;
        p_dec->fmt_out.video.i_visible_height = height;
    }
154

155
    if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
156
    {
157 158 159 160
        /* 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;
161
    }
162
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
163 164

    /* If an aspect-ratio was specified in the input format then force it */
Laurent Aimar's avatar
Laurent Aimar committed
165
    if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
166
    {
Laurent Aimar's avatar
Laurent Aimar committed
167 168
        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;
169 170 171
    }
    else
    {
172 173
        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;
174

Laurent Aimar's avatar
Laurent Aimar committed
175
        if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
176
        {
Laurent Aimar's avatar
Laurent Aimar committed
177 178
            p_dec->fmt_out.video.i_sar_num = 1;
            p_dec->fmt_out.video.i_sar_den = 1;
179 180 181
        }
    }

Laurent Aimar's avatar
Laurent Aimar committed
182 183
    if( p_dec->fmt_in.video.i_frame_rate > 0 &&
        p_dec->fmt_in.video.i_frame_rate_base > 0 )
184 185 186 187
    {
        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
188
            p_dec->fmt_in.video.i_frame_rate_base;
189
    }
190
    else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
191 192
    {
        p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
193
        p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num * __MAX( p_context->ticks_per_frame, 1 );
194
    }
195

196
    return decoder_NewPicture( p_dec );
197 198 199 200 201 202 203 204
}

/*****************************************************************************
 * 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
205
int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
206
                      AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
207 208
{
    decoder_sys_t *p_sys;
209
    int i_val;
210 211

    /* Allocate the memory needed to store the decoder's structure */
ivoire's avatar
ivoire committed
212
    if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
213
        return VLC_ENOMEM;
214

215 216
    p_codec->type = AVMEDIA_TYPE_VIDEO;
    p_context->codec_type = AVMEDIA_TYPE_VIDEO;
217
    p_context->codec_id = i_codec_id;
218 219 220 221
    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;
222
    p_sys->p_ff_pic = avcodec_alloc_frame();
223
    p_sys->b_delayed_open = true;
224
    p_sys->p_va = NULL;
Laurent Aimar's avatar
Laurent Aimar committed
225
    vlc_sem_init( &p_sys->sem_mt, 0 );
226 227

    /* ***** Fill p_context with init values ***** */
228
    p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
229 230 231

    /*  ***** Get configuration of ffmpeg plugin ***** */
    p_sys->p_context->workaround_bugs =
232
        var_InheritInteger( p_dec, "avcodec-workaround-bugs" );
233
    p_sys->p_context->err_recognition =
234
        var_InheritInteger( p_dec, "avcodec-error-resilience" );
235

236 237
    if( var_CreateGetBool( p_dec, "grayscale" ) )
        p_sys->p_context->flags |= CODEC_FLAG_GRAY;
238

Luca Barbato's avatar
Luca Barbato committed
239 240 241 242 243
    /* ***** Output always the frames ***** */
#if LIBAVCODEC_VERSION_CHECK(55, 23, 1, 40, 101)
    p_sys->p_context->flags |= CODEC_FLAG_OUTPUT_CORRUPT;
#endif

244
    i_val = var_CreateGetInteger( p_dec, "avcodec-vismv" );
245
    if( i_val ) p_sys->p_context->debug_mv = i_val;
246

247
    i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" );
248 249 250 251
    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;
252

253
    if( var_CreateGetBool( p_dec, "avcodec-fast" ) )
254
        p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
255

256
    /* ***** libavcodec frame skipping ***** */
257
    p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" );
258

259 260 261 262 263 264 265
    i_val = var_CreateGetInteger( p_dec, "avcodec-skip-frame" );
    if( i_val >= 4 ) p_sys->p_context->skip_frame = AVDISCARD_ALL;
    else if( i_val == 3 ) p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
    else if( i_val == 2 ) p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
    else if( i_val == 1 ) p_sys->p_context->skip_frame = AVDISCARD_NONREF;
    else if( i_val == -1 ) p_sys->p_context->skip_frame = AVDISCARD_NONE;
    else p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
266
    p_sys->i_skip_frame = p_sys->p_context->skip_frame;
267

268 269 270 271 272 273 274
    i_val = var_CreateGetInteger( p_dec, "avcodec-skip-idct" );
    if( i_val >= 4 ) p_sys->p_context->skip_idct = AVDISCARD_ALL;
    else if( i_val == 3 ) p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
    else if( i_val == 2 ) p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
    else if( i_val == 1 ) p_sys->p_context->skip_idct = AVDISCARD_NONREF;
    else if( i_val == -1 ) p_sys->p_context->skip_idct = AVDISCARD_NONE;
    else p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
275
    p_sys->i_skip_idct = p_sys->p_context->skip_idct;
276

277
    /* ***** libavcodec direct rendering ***** */
278
    p_sys->b_direct_rendering = false;
279
    p_sys->i_direct_rendering_used = -1;
280
    if( var_CreateGetBool( p_dec, "avcodec-dr" ) &&
281
       (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
282
        /* No idea why ... but this fixes flickering on some TSCC streams */
283 284
        p_sys->i_codec_id != AV_CODEC_ID_TSCC && p_sys->i_codec_id != AV_CODEC_ID_CSCD &&
        p_sys->i_codec_id != AV_CODEC_ID_CINEPAK &&
285 286 287 288
        !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() */
289
        p_sys->b_direct_rendering = true;
290 291
    }

292
    /* libavcodec doesn't properly release old pictures when frames are skipped */
293
    //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
294 295
    if( p_sys->b_direct_rendering )
    {
296
        msg_Dbg( p_dec, "trying to use direct rendering" );
297 298
        p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
    }
299 300 301 302
    else
    {
        msg_Dbg( p_dec, "direct rendering is disabled" );
    }
303

304
    p_sys->p_context->get_format = ffmpeg_GetFormat;
305 306
    /* Always use our get_buffer wrapper so we can calculate the
     * PTS correctly */
307 308 309
#if LIBAVCODEC_VERSION_MAJOR >= 55
    p_sys->p_context->get_buffer2 = lavc_GetFrame;
#else
310
    p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
311
    p_sys->p_context->reget_buffer = avcodec_default_reget_buffer;
312
    p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
313
#endif
314 315
    p_sys->p_context->opaque = p_dec;

Laurent Aimar's avatar
Laurent Aimar committed
316
#ifdef HAVE_AVCODEC_MT
317
    int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
Laurent Aimar's avatar
Laurent Aimar committed
318
    if( i_thread_count <= 0 )
319
    {
Laurent Aimar's avatar
Laurent Aimar committed
320
        i_thread_count = vlc_GetCPUCount();
321 322
        if( i_thread_count > 1 )
            i_thread_count++;
323 324 325

        //FIXME: take in count the decoding time
        i_thread_count = __MIN( i_thread_count, 4 );
326
    }
327
    i_thread_count = __MIN( i_thread_count, 16 );
328 329
    msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
    p_sys->p_context->thread_count = i_thread_count;
330
    p_sys->p_context->thread_safe_callbacks = true;
331

332
    switch( i_codec_id )
Laurent Aimar's avatar
Laurent Aimar committed
333
    {
334 335 336 337 338 339 340 341
        case AV_CODEC_ID_MPEG4:
        case AV_CODEC_ID_H263:
            p_sys->p_context->thread_type = 0;
            break;
        case AV_CODEC_ID_MPEG1VIDEO:
        case AV_CODEC_ID_MPEG2VIDEO:
            p_sys->p_context->thread_type &= ~FF_THREAD_SLICE;
            /* fall through */
342
# if (LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55, 1, 0))
343 344 345
        case AV_CODEC_ID_H264:
        case AV_CODEC_ID_VC1:
        case AV_CODEC_ID_WMV3:
346
            p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
347
# endif
348
    }
349

350 351 352 353 354 355 356 357 358 359 360 361 362 363 364
    /* Workaround: frame multithreading is not compatible with
     * DXVA2. When a frame is being copied to host memory, the frame
     * is locked and cannot be used as a reference frame
     * simultaneously and thus decoding fails for some frames. This
     * causes major image corruption. */
# if defined(_WIN32)
    char *avcodec_hw = var_InheritString( p_dec, "avcodec-hw" );
    if( avcodec_hw == NULL || strcasecmp( avcodec_hw, "none" ) )
    {
        msg_Warn( p_dec, "threaded frame decoding is not compatible with DXVA2, disabled" );
        p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
    }
    free( avcodec_hw );
# endif

365 366 367 368
    if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
        p_dec->i_extra_picture_buffers = 2 * p_sys->p_context->thread_count;
#endif

369
    /* ***** misc init ***** */
370
    p_sys->i_pts = VLC_TS_INVALID;
371 372
    p_sys->b_has_b_frames = false;
    p_sys->b_first_frame = true;
373
    p_sys->b_flush = false;
374 375 376 377
    p_sys->i_late_frames = 0;

    /* Set output properties */
    p_dec->fmt_out.i_cat = VIDEO_ES;
378 379
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
    {
380
        /* we are doomed. but not really, because most codecs set their pix_fmt later on */
381
        p_dec->fmt_out.i_codec = VLC_CODEC_I420;
382 383
    }
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
384

385 386
    p_dec->fmt_out.video.orientation = p_dec->fmt_in.video.orientation;

387 388 389 390 391 392 393
    if( p_dec->fmt_in.video.p_palette ) {
        p_sys->palette_sent = false;
        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;
    } else
        p_sys->palette_sent = true;
394

395 396 397
    /* ***** init this codec with special data ***** */
    ffmpeg_InitCodec( p_dec );

398
    /* ***** Open the codec ***** */
399
    if( ffmpeg_OpenCodec( p_dec ) < 0 )
400 401
    {
        msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
402
        av_free( p_sys->p_ff_pic );
Laurent Aimar's avatar
Laurent Aimar committed
403
        vlc_sem_destroy( &p_sys->sem_mt );
404 405 406 407 408 409 410 411 412 413
        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
414
picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
415 416
{
    decoder_sys_t *p_sys = p_dec->p_sys;
417
    AVCodecContext *p_context = p_sys->p_context;
418 419 420
    int b_drawpicture;
    block_t *p_block;

421
    if( !pp_block )
422
        return NULL;
423

424
    if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
425
    {
426
        ffmpeg_InitCodec( p_dec );
427 428 429 430 431 432
        if( p_sys->b_delayed_open )
        {
            if( ffmpeg_OpenCodec( p_dec ) )
                msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
        }
    }
433

434
    p_block = *pp_block;
435 436 437
    if(!p_block && !(p_sys->p_codec->capabilities & CODEC_CAP_DELAY) )
        return NULL;

438 439
    if( p_sys->b_delayed_open )
    {
440 441
        if( p_block )
            block_Release( p_block );
442 443
        return NULL;
    }
444

445
    if( p_block)
446
    {
447 448 449
        if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
        {
            p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
450

451
            p_sys->i_late_frames = 0;
452

453 454 455 456
            post_mt( p_sys );
            if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
                avcodec_flush_buffers( p_context );
            wait_mt( p_sys );
Laurent Aimar's avatar
Laurent Aimar committed
457

458 459 460
            block_Release( p_block );
            return NULL;
        }
461

462 463 464 465 466 467 468
        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;
        }
469 470
    }

471
    if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
472
        (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
473
    {
474
        if( p_sys->i_pts > VLC_TS_INVALID )
475
        {
476
            p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
477
        }
478 479
        if( p_block )
            block_Release( p_block );
480
        p_sys->i_late_frames--;
481 482
        msg_Err( p_dec, "more than 5 seconds of late video -> "
                 "dropping frame (computer too slow ?)" );
483 484 485 486 487
        return NULL;
    }

    /* A good idea could be to decode all I pictures and see for the other */
    if( !p_dec->b_pace_control &&
488 489
        p_sys->b_hurry_up &&
        (p_sys->i_late_frames > 4) )
490 491
    {
        b_drawpicture = 0;
492
        if( p_sys->i_late_frames < 12 )
493
        {
494
            p_context->skip_frame =
495 496
                    (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
                    AVDISCARD_NONREF : p_sys->i_skip_frame;
497 498 499 500 501 502
        }
        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 */
503 504
            if( p_block )
                block_Release( p_block );
505
            msg_Warn( p_dec, "More than 4 late frames, dropping frame" );
506 507 508 509 510
            return NULL;
        }
    }
    else
    {
511
        if( p_sys->b_hurry_up )
512
            p_context->skip_frame = p_sys->i_skip_frame;
513
        if( !p_block || !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
514 515 516 517 518
            b_drawpicture = 1;
        else
            b_drawpicture = 0;
    }

519
    if( p_context->width <= 0 || p_context->height <= 0 )
520
    {
521
        if( p_sys->b_hurry_up )
522
            p_context->skip_frame = p_sys->i_skip_frame;
523
    }
Laurent Aimar's avatar
Laurent Aimar committed
524 525
    else if( !b_drawpicture )
    {
526 527 528
        /* It creates broken picture
         * FIXME either our parser or ffmpeg is broken */
#if 0
529
        if( p_sys->b_hurry_up )
530
            p_context->skip_frame = __MAX( p_context->skip_frame,
531
                                                  AVDISCARD_NONREF );
532
#endif
Laurent Aimar's avatar
Laurent Aimar committed
533
    }
534 535

    /*
536
     * Do the actual decoding now */
537

538
    /* Don't forget that libavcodec requires a little more bytes
539
     * that the real frame size */
540
    if( p_block && p_block->i_buffer > 0 )
541
    {
542 543
        p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;

544 545 546
        p_block = block_Realloc( p_block, 0,
                            p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
        if( !p_block )
ivoire's avatar
ivoire committed
547
            return NULL;
548
        p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
549
        *pp_block = p_block;
550
        memset( p_block->p_buffer + p_block->i_buffer, 0,
551 552 553
                FF_INPUT_BUFFER_PADDING_SIZE );
    }

554
    while( !p_block || p_block->i_buffer > 0 || p_sys->b_flush )
555 556 557
    {
        int i_used, b_gotpicture;
        picture_t *p_pic;
558
        AVPacket pkt;
559

Laurent Aimar's avatar
Laurent Aimar committed
560
        post_mt( p_sys );
561

562
        av_init_packet( &pkt );
563 564 565 566 567 568 569 570 571 572 573 574 575
        if( p_block )
        {
            pkt.data = p_block->p_buffer;
            pkt.size = p_block->i_buffer;
            pkt.pts = p_block->i_pts;
            pkt.dts = p_block->i_dts;
        }
        else
        {
            /* Return delayed frames if codec has CODEC_CAP_DELAY */
            pkt.data = NULL;
            pkt.size = 0;
        }
576

577 578 579 580 581 582 583 584 585
        if( !p_sys->palette_sent )
        {
            uint8_t *pal = av_packet_new_side_data(&pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
            if (pal) {
                memcpy(pal, p_dec->fmt_in.video.p_palette->palette, AVPALETTE_SIZE);
                p_sys->palette_sent = true;
            }
        }

586
        /* Make sure we don't reuse the same timestamps twice */
587 588 589 590 591
        if( p_block )
        {
            p_block->i_pts =
            p_block->i_dts = VLC_TS_INVALID;
        }
592

593 594
        i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
                                       &b_gotpicture, &pkt );
595

Laurent Aimar's avatar
Laurent Aimar committed
596
        wait_mt( p_sys );
597

598 599 600
        if( p_sys->b_flush )
            p_sys->b_first_frame = true;

601
        if( p_block )
602
        {
603 604
            if( p_block->i_buffer <= 0 )
                p_sys->b_flush = false;
605

606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623
            if( i_used < 0 )
            {
                if( b_drawpicture )
                    msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
                            p_block->i_buffer );
                block_Release( p_block );
                return NULL;
            }
            else if( (unsigned)i_used > p_block->i_buffer ||
                    p_context->thread_count > 1 )
            {
                i_used = p_block->i_buffer;
            }

            /* Consumed bytes */
            p_block->i_buffer -= i_used;
            p_block->p_buffer += i_used;
        }
624 625 626 627 628 629 630 631

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

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

638
        /* Compute the PTS */
639 640 641 642 643
        mtime_t i_pts =
                    p_sys->p_ff_pic->pkt_pts;
        if (i_pts <= VLC_TS_INVALID)
            i_pts = p_sys->p_ff_pic->pkt_dts;

644 645 646 647 648 649 650 651 652 653 654 655
        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 )
            {
656
                p_sys->i_pts += CLOCK_FREQ *
657 658 659 660 661 662 663 664 665 666
                    (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;

667
                p_sys->i_pts += CLOCK_FREQ *
668 669 670 671 672
                    (2 + p_sys->p_ff_pic->repeat_pict) *
                    i_tick * p_context->time_base.num /
                    (2 * p_context->time_base.den);
            }
        }
673

674
        /* Update frame late count (except when doing preroll) */
675
        mtime_t i_display_date = 0;
676
        if( !p_block || !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
677
            i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
678

679
        if( i_display_date > 0 && i_display_date <= mdate() )
680 681 682 683 684 685 686 687 688 689
        {
            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;
        }

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

693
        if( p_sys->p_va != NULL || p_sys->p_ff_pic->opaque == NULL )
694 695
        {
            /* Get a new picture */
696
            p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
697 698
            if( !p_pic )
            {
699 700
                if( p_block )
                    block_Release( p_block );
701 702 703 704 705 706 707 708 709 710
                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;
711
            decoder_LinkPicture( p_dec, p_pic );
712 713
        }

Laurent Aimar's avatar
Laurent Aimar committed
714
        if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
715 716
        {
            /* Fetch again the aspect ratio in case it changed */
717
            p_dec->fmt_out.video.i_sar_num
718
                = p_context->sample_aspect_ratio.num;
719
            p_dec->fmt_out.video.i_sar_den
720
                = p_context->sample_aspect_ratio.den;
721

Laurent Aimar's avatar
Laurent Aimar committed
722
            if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
723
            {
Laurent Aimar's avatar
Laurent Aimar committed
724 725
                p_dec->fmt_out.video.i_sar_num = 1;
                p_dec->fmt_out.video.i_sar_den = 1;
726 727 728
            }
        }

729
        /* Send decoded frame to vout */
730
        if( i_pts > VLC_TS_INVALID)
731
        {
732
            p_pic->date = i_pts;
733 734 735 736

            if( p_sys->b_first_frame )
            {
                /* Hack to force display of still pictures */
737 738
                p_sys->b_first_frame = false;
                p_pic->b_force = true;
739 740 741 742 743 744 745 746 747 748
            }

            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;

            return p_pic;
        }
        else
        {
749
            decoder_DeletePicture( p_dec, p_pic );
750 751 752
        }
    }

753 754
    if( p_block )
        block_Release( p_block );
755 756 757 758 759 760
    return NULL;
}

/*****************************************************************************
 * EndVideo: decoder destruction
 *****************************************************************************
761
 * This function is called when the thread ends after a successful
762 763
 * initialization.
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
764
void EndVideoDec( decoder_t *p_dec )
765 766 767
{
    decoder_sys_t *p_sys = p_dec->p_sys;

Laurent Aimar's avatar
Laurent Aimar committed
768 769
    post_mt( p_sys );

770 771 772
    /* 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 );
773

Laurent Aimar's avatar
Laurent Aimar committed
774 775
    wait_mt( p_sys );

776 777
    if( p_sys->p_ff_pic )
        av_free( p_sys->p_ff_pic );
778 779

    if( p_sys->p_va )
780
        vlc_va_Delete( p_sys->p_va );
781

Laurent Aimar's avatar
Laurent Aimar committed
782
    vlc_sem_destroy( &p_sys->sem_mt );
783 784
}

785 786 787 788 789 790 791 792 793 794
/*****************************************************************************
 * 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;

795
    if( p_sys->i_codec_id == AV_CODEC_ID_SVQ3 )
796 797 798 799
    {
        uint8_t *p;

        p_sys->p_context->extradata_size = i_size + 12;
800 801 802
        p = p_sys->p_context->extradata =
            av_malloc( p_sys->p_context->extradata_size +
                       FF_INPUT_BUFFER_PADDING_SIZE );
ivoire's avatar
ivoire committed
803 804
        if( !p )
            return;
805 806 807 808 809 810 811

        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 &&
812
            strncmp( (char*)&p[0x56], "SMI ", 4 ) )
813 814 815 816 817 818 819 820 821 822 823
        {
            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;
                }
824
                if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
825 826 827 828 829 830 831 832 833 834 835 836 837 838
                {
                    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 =
839
            av_malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
ivoire's avatar
ivoire committed
840 841 842 843
        if( p_sys->p_context->extradata )
        {
            memcpy( p_sys->p_context->extradata,
                    p_dec->fmt_in.p_extra, i_size );
844
            memset( p_sys->p_context->extradata + i_size,
ivoire's avatar
ivoire committed
845 846
                    0, FF_INPUT_BUFFER_PADDING_SIZE );
        }
847 848 849
    }
}

850 851 852 853 854 855 856 857 858
/*****************************************************************************
 * 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;

859 860
    if( p_sys->p_va )
    {
861 862
        vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic->opaque,
                        p_ff_pic->data[3] );
863
    }