video.c 33 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 34 35
#include <vlc_codec.h>
#include <vlc_vout.h>
#include <vlc_input.h>                  /* hmmm, just for INPUT_RATE_DEFAULT */
36
#include <vlc_codecs.h>                               /* BITMAPINFOHEADER */
37 38

/* ffmpeg header */
39 40 41
#ifdef HAVE_LIBAVCODEC_AVCODEC_H
#   include <libavcodec/avcodec.h>
#elif defined(HAVE_FFMPEG_AVCODEC_H)
42
#   include <ffmpeg/avcodec.h>
43 44 45 46
#else
#   include <avcodec.h>
#endif

47
#include "avcodec.h"
48 49 50 51 52 53

/*****************************************************************************
 * decoder_sys_t : decoder descriptor
 *****************************************************************************/
struct decoder_sys_t
{
54
    FFMPEG_COMMON_MEMBERS
55 56 57 58 59 60 61 62 63 64 65

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

    AVFrame          *p_ff_pic;
    BITMAPINFOHEADER *p_format;

    /* for frame skipping algo */
    int b_hurry_up;
66 67
    enum AVDiscard i_skip_frame;
    enum AVDiscard i_skip_idct;
68 69 70 71 72 73 74 75

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

    /* for direct rendering */
    int b_direct_rendering;

76
    bool b_has_b_frames;
77 78

    /* Hack to force display of still pictures */
79
    bool b_first_frame;
80 81 82 83 84 85

    int i_buffer_orig, i_buffer;
    char *p_buffer_orig, *p_buffer;

    /* Postprocessing handle */
    void *p_pp;
86 87 88
    bool b_pp;
    bool b_pp_async;
    bool b_pp_init;
89 90 91 92 93 94 95 96
};

/* FIXME (dummy palette for now) */
static AVPaletteControl palette_control;

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
97
static void ffmpeg_InitCodec      ( decoder_t * );
98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
static void ffmpeg_CopyPicture    ( decoder_t *, picture_t *, AVFrame * );
static int  ffmpeg_GetFrameBuf    ( struct AVCodecContext *, AVFrame * );
static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );

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
 *****************************************************************************/
static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
{
    switch( i_ff_chroma )
    {
    case PIX_FMT_YUV420P:
116
    case PIX_FMT_YUVJ420P: /* Hacky but better then chroma conversion */
117 118
        return VLC_FOURCC('I','4','2','0');
    case PIX_FMT_YUV422P:
119
    case PIX_FMT_YUVJ422P: /* Hacky but better then chroma conversion */
120 121
        return VLC_FOURCC('I','4','2','2');
    case PIX_FMT_YUV444P:
122
    case PIX_FMT_YUVJ444P: /* Hacky but better then chroma conversion */
123 124 125 126 127
        return VLC_FOURCC('I','4','4','4');

    case PIX_FMT_YUV422:
        return VLC_FOURCC('Y','U','Y','2');

128 129 130 131 132 133 134 135 136 137
#if defined(WORDS_BIGENDIAN)
    case PIX_FMT_BGR8:
        return VLC_FOURCC('R','G','B','8');
    case PIX_FMT_BGR555:
        return VLC_FOURCC('R','V','1','5');
    case PIX_FMT_BGR565:
        return VLC_FOURCC('R','V','1','6');
    case PIX_FMT_BGR24:
        return VLC_FOURCC('R','V','2','4');
#else
138
#if defined(PIX_FMT_RGB8)
139 140
    case PIX_FMT_RGB8:
        return VLC_FOURCC('R','G','B','8');
141
#endif
142 143 144 145 146 147
    case PIX_FMT_RGB555:
        return VLC_FOURCC('R','V','1','5');
    case PIX_FMT_RGB565:
        return VLC_FOURCC('R','V','1','6');
    case PIX_FMT_RGB24:
        return VLC_FOURCC('R','V','2','4');
148
#endif
149 150
    case PIX_FMT_RGBA32:
        return VLC_FOURCC('R','V','3','2');
151
#ifdef PIX_FMT_RGBA
152 153
    case PIX_FMT_RGBA:
        return VLC_FOURCC('R','G','B','A');
154
#endif
155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196
    case PIX_FMT_GRAY8:
        return VLC_FOURCC('G','R','E','Y');

    case PIX_FMT_YUV410P:
    case PIX_FMT_YUV411P:
    default:
        return 0;
    }
}

/* Returns a new picture buffer */
static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
                                            AVCodecContext *p_context )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    picture_t *p_pic;

    p_dec->fmt_out.video.i_width = p_context->width;
    p_dec->fmt_out.video.i_height = p_context->height;
    p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );

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

    if( !p_dec->fmt_out.i_codec )
    {
        /* we make conversion if possible*/
        p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
    }

    /* 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 );
197 198
        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;
199

200 201 202 203 204 205 206
        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;
        }
    }

207 208 209 210 211 212
    if( p_dec->fmt_out.video.i_frame_rate > 0 &&
        p_dec->fmt_out.video.i_frame_rate_base > 0 )
    {
        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
213
            p_dec->fmt_in.video.i_frame_rate_base;
214
    }
215
    else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
216 217 218 219
    {
        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;
    }
220 221 222

    p_pic = p_dec->pf_vout_buffer_new( p_dec );

223 224 225 226 227 228
// FIXME    if( p_sys->p_pp && p_sys->b_pp && !p_sys->b_pp_init )
// FIXME    {
// FIXME        InitPostproc( p_sys->p_pp, p_context->width,
// FIXME                          p_context->height, p_context->pix_fmt );
// FIXME        p_sys->b_pp_init = true;
// FIXME    }
229 230 231 232 233 234 235 236 237 238

    return p_pic;
}

/*****************************************************************************
 * 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
239
int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
240
                      AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
241 242 243 244 245 246 247 248 249
{
    decoder_sys_t *p_sys;
    vlc_value_t val;

    /* Allocate the memory needed to store the decoder's structure */
    if( ( p_dec->p_sys = p_sys =
          (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
    {
        msg_Err( p_dec, "out of memory" );
250
        return VLC_ENOMEM;
251
    }
252
    memset( p_sys, 0, sizeof(decoder_sys_t) );
253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283

    p_dec->p_sys->p_context = p_context;
    p_dec->p_sys->p_codec = p_codec;
    p_dec->p_sys->i_codec_id = i_codec_id;
    p_dec->p_sys->psz_namecodec = psz_namecodec;
    p_sys->p_ff_pic = avcodec_alloc_frame();

    /* ***** Fill p_context with init values ***** */
    p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
    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_sample = p_dec->fmt_in.video.i_bits_per_pixel;

    /*  ***** Get configuration of ffmpeg plugin ***** */
    p_sys->p_context->workaround_bugs =
        config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
    p_sys->p_context->error_resilience =
        config_GetInt( p_dec, "ffmpeg-error-resilience" );

    var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Get( p_dec, "grayscale", &val );
    if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;

    var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_dec, "ffmpeg-vismv", &val );
    if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;

    var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_dec, "ffmpeg-lowres", &val );
    if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;

284 285 286 287 288 289 290 291
    var_Create( p_dec, "ffmpeg-skiploopfilter",
                VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
    if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
    if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
    if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
    if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;

292 293 294 295 296
    /* ***** ffmpeg frame skipping ***** */
    var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Get( p_dec, "ffmpeg-hurry-up", &val );
    p_sys->b_hurry_up = val.b_bool;

297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319
    var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_dec, "ffmpeg-skip-frame", &val );
    switch( val.i_int )
    {
        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;
    }
320
    p_sys->i_skip_frame = p_sys->p_context->skip_frame;
321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344

    var_Create( p_dec, "ffmpeg-skip-idct",  VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_dec, "ffmpeg-skip-idct", &val );
    switch( val.i_int )
    {
        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;
    }
345
    p_sys->i_skip_idct = p_sys->p_context->skip_idct;
346

347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363
    /* ***** ffmpeg direct rendering ***** */
    p_sys->b_direct_rendering = 0;
    var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Get( p_dec, "ffmpeg-dr", &val );
    if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
        /* 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 &&
        !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() */
        p_sys->b_direct_rendering = 1;
    }

    p_sys->p_pp = NULL;
364
    p_sys->b_pp = p_sys->b_pp_async = p_sys->b_pp_init = false;
365
    // FIXME p_sys->p_pp = OpenPostproc( p_dec, &p_sys->b_pp_async );
366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381

    /* ffmpeg doesn't properly release old pictures when frames are skipped */
    //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
    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;
    p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
    p_sys->p_context->opaque = p_dec;

    /* ***** init this codec with special data ***** */
382
    ffmpeg_InitCodec( p_dec );
383 384 385 386

    /* ***** misc init ***** */
    p_sys->input_pts = p_sys->input_dts = 0;
    p_sys->i_pts = 0;
387 388
    p_sys->b_has_b_frames = false;
    p_sys->b_first_frame = true;
389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405
    p_sys->i_late_frames = 0;
    p_sys->i_buffer = 0;
    p_sys->i_buffer_orig = 1;
    p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );

    /* Set output properties */
    p_dec->fmt_out.i_cat = VIDEO_ES;
    p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );

    /* Setup palette */
    if( p_dec->fmt_in.video.p_palette )
        p_sys->p_context->palctrl =
            (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
    else
        p_sys->p_context->palctrl = &palette_control;

    /* ***** Open the codec ***** */
Rémi Denis-Courmont's avatar
Typo  
Rémi Denis-Courmont committed
406
    vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
407 408 409 410 411 412
    if( lock == NULL )
    {
        free( p_sys );
        return VLC_ENOMEM;
    }

413 414
    if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
    {
415
        vlc_mutex_unlock( lock );
416 417 418 419
        msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
        free( p_sys );
        return VLC_EGENERIC;
    }
420
    vlc_mutex_unlock( lock );
421 422 423 424 425 426 427 428 429
    msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );


    return VLC_SUCCESS;
}

/*****************************************************************************
 * DecodeVideo: Called to decode one or more frames
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
430
picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
431 432 433
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    int b_drawpicture;
434
    int b_null_size = false;
435 436 437 438
    block_t *p_block;

    if( !pp_block || !*pp_block ) return NULL;

439 440 441
    if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
        ffmpeg_InitCodec( p_dec );

442 443 444 445 446 447 448 449 450 451 452
    p_block = *pp_block;

    if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
    {
        p_sys->i_buffer = 0;
        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
453 454 455

        //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
            //avcodec_flush_buffers( p_sys->p_context );
456 457 458 459 460 461 462 463 464 465 466
        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;
    }

467
    if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
468
        (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491
    {
        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 &&
492 493
        p_sys->b_hurry_up &&
        (p_sys->i_late_frames > 4) )
494 495 496 497
    {
        b_drawpicture = 0;
        if( p_sys->i_late_frames < 8 )
        {
498 499 500
            p_sys->p_context->skip_frame =
                    (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
                    AVDISCARD_BIDIR : p_sys->i_skip_frame;
501 502 503 504 505 506 507 508 509 510 511 512 513
        }
        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 );
            p_sys->i_buffer = 0;
            return NULL;
        }
    }
    else
    {
514
        if( p_sys->b_hurry_up )
515
            p_sys->p_context->skip_frame = p_sys->i_skip_frame;
Laurent Aimar's avatar
Laurent Aimar committed
516
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
517 518 519 520 521 522 523
            b_drawpicture = 1;
        else
            b_drawpicture = 0;
    }

    if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
    {
524
        if( p_sys->b_hurry_up )
525
            p_sys->p_context->skip_frame = p_sys->i_skip_frame;
526
        b_null_size = true;
527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550
    }

    /*
     * Do the actual decoding now
     */

    /* Check if post-processing was enabled */
    p_sys->b_pp = p_sys->b_pp_async;

    /* Don't forget that ffmpeg requires a little more bytes
     * that the real frame size */
    if( p_block->i_buffer > 0 )
    {
        p_sys->i_buffer = p_block->i_buffer;
        if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
            p_sys->i_buffer_orig )
        {
            free( p_sys->p_buffer_orig );
            p_sys->i_buffer_orig =
                p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
            p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
        }
        p_sys->p_buffer = p_sys->p_buffer_orig;
        p_sys->i_buffer = p_block->i_buffer;
551
        vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
552 553 554 555 556 557 558 559 560 561 562 563 564
        memset( p_sys->p_buffer + p_block->i_buffer, 0,
                FF_INPUT_BUFFER_PADDING_SIZE );

        p_block->i_buffer = 0;
    }

    while( p_sys->i_buffer > 0 )
    {
        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,
565
                                       (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
566 567 568 569
        if( b_null_size && p_sys->p_context->width > 0 &&
            p_sys->p_context->height > 0 )
        {
            /* Reparse it to not drop the I frame */
570
            b_null_size = false;
571
            if( p_sys->b_hurry_up )
572
                p_sys->p_context->skip_frame = p_sys->i_skip_frame;
573 574
            i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
                                           &b_gotpicture,
575
                                           (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601
        }

        if( i_used < 0 )
        {
            msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
                      p_sys->i_buffer );
            block_Release( p_block );
            return NULL;
        }
        else if( i_used > p_sys->i_buffer )
        {
            i_used = p_sys->i_buffer;
        }

        /* Consumed bytes */
        p_sys->i_buffer -= i_used;
        p_sys->p_buffer += i_used;

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

        /* Update frame late count (except when doing preroll) */
Laurent Aimar's avatar
Laurent Aimar committed
602
        if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
603 604 605 606 607 608 609 610 611 612 613 614 615 616
            !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
        {
            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;
        }

        if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
        {
            /* Do not display the picture */
Laurent Aimar's avatar
Laurent Aimar committed
617 618 619
            p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
            if( !b_drawpicture && p_pic )
                p_dec->pf_vout_buffer_del( p_dec, p_pic );
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
            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;
        }

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

645
        /* Sanity check (seems to be needed for some streams) */
646 647
        if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
        {
648
            p_sys->b_has_b_frames = true;
649 650
        }

651 652 653 654 655 656 657 658 659 660 661
        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;
662

663 664 665 666 667 668 669
            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;
            }
        }

670 671 672 673 674 675
        /* Send decoded frame to vout */
        if( p_sys->i_pts )
        {
            p_pic->date = p_sys->i_pts;

            /* interpolate the next PTS */
676 677 678
            if( p_dec->fmt_in.video.i_frame_rate > 0 &&
                p_dec->fmt_in.video.i_frame_rate_base > 0 )
            {
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
679
                p_sys->i_pts += INT64_C(1000000) *
680 681 682 683 684 685
                    (2 + p_sys->p_ff_pic->repeat_pict) *
                    p_dec->fmt_in.video.i_frame_rate_base *
                    p_block->i_rate / INPUT_RATE_DEFAULT /
                    (2 * p_dec->fmt_in.video.i_frame_rate);
            }
            else if( p_sys->p_context->time_base.den > 0 )
686
            {
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
687
                p_sys->i_pts += INT64_C(1000000) *
688 689 690 691 692
                    (2 + p_sys->p_ff_pic->repeat_pict) *
                    p_sys->p_context->time_base.num *
                    p_block->i_rate / INPUT_RATE_DEFAULT /
                    (2 * p_sys->p_context->time_base.den);
            }
693 694 695 696

            if( p_sys->b_first_frame )
            {
                /* Hack to force display of still pictures */
697 698
                p_sys->b_first_frame = false;
                p_pic->b_force = true;
699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719
            }

            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
        {
            p_dec->pf_vout_buffer_del( p_dec, p_pic );
        }
    }

    block_Release( p_block );
    return NULL;
}

/*****************************************************************************
 * EndVideo: decoder destruction
 *****************************************************************************
720
 * This function is called when the thread ends after a successful
721 722
 * initialization.
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
723
void EndVideoDec( decoder_t *p_dec )
724 725 726 727
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
728
    // FIXME ClosePostproc( p_dec, p_sys->p_pp );
729 730 731
    free( p_sys->p_buffer_orig );
}

732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755
/*****************************************************************************
 * 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 );

        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 &&
756
            strncmp( (char*)&p[0x56], "SMI ", 4 ) )
757 758 759 760 761 762 763 764 765 766 767
        {
            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;
                }
768
                if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807
                {
                    memmove( &p[0x52], psz,
                             &p[p_sys->p_context->extradata_size] - psz );
                    break;
                }

                psz += i_size;
            }
        }
    }
    else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
             p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
             p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
    {
        if( p_dec->fmt_in.i_extra == 8 )
        {
            p_sys->p_context->extradata_size = 8;
            p_sys->p_context->extradata = malloc( 8 );

            memcpy( p_sys->p_context->extradata,
                    p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
            p_sys->p_context->sub_id= ((uint32_t*)p_dec->fmt_in.p_extra)[1];

            msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
                      p_sys->p_context->sub_id );
        }
    }
    else
    {
        p_sys->p_context->extradata_size = i_size;
        p_sys->p_context->extradata =
            malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
        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 );
    }
}

808 809 810 811 812 813 814 815 816 817 818 819 820 821 822
/*****************************************************************************
 * 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;

    if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
    {
        int i_plane, i_size, i_line;
        uint8_t *p_dst, *p_src;
        int i_src_stride, i_dst_stride;

823 824 825
        // FIXME if( p_sys->p_pp && p_sys->b_pp )
        // FIXME    PostprocPict( p_sys->p_pp, p_pic, p_ff_pic );
        // FIXME else
826
        {
827
            for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
828
            {
829 830 831 832 833 834 835 836 837
                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++ )
                {
838
                    vlc_memcpy( p_dst, p_src, i_size );
839 840 841
                    p_src += i_src_stride;
                    p_dst += i_dst_stride;
                }
842 843 844 845 846 847 848 849 850 851 852 853 854
            }
        }
    }
    else
    {
        AVPicture dest_pic;
        int i;

        /* we need to convert to I420 */
        switch( p_sys->p_context->pix_fmt )
        {
        case PIX_FMT_YUV410P:
        case PIX_FMT_YUV411P:
855 856
        case PIX_FMT_RGB32:
        case PIX_FMT_RGB24:
857
#if defined(PIX_FMT_RGB8)
858
        case PIX_FMT_RGB8:
859 860
#endif
#if defined(PIX_FMT_BRG32)
861
        case PIX_FMT_BGR32:
862
#endif
863
        case PIX_FMT_BGR24:
864
#if defined(PIX_FMT_BGR8)
865
        case PIX_FMT_BGR8:
866
#endif
867 868 869 870 871 872
        case PIX_FMT_PAL8:
            for( i = 0; i < p_pic->i_planes; i++ )
            {
                dest_pic.data[i] = p_pic->p[i].p_pixels;
                dest_pic.linesize[i] = p_pic->p[i].i_pitch;
            }
873
#if !defined(HAVE_LIBSWSCALE_SWSCALE_H)  && !defined(HAVE_FFMPEG_SWSCALE_H)
874 875 876 877 878
            img_convert( &dest_pic, PIX_FMT_YUV420P,
                         (AVPicture *)p_ff_pic,
                         p_sys->p_context->pix_fmt,
                         p_sys->p_context->width,
                         p_sys->p_context->height );
879
#endif
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965
            break;
        default:
            msg_Err( p_dec, "don't know how to convert chroma %i",
                     p_sys->p_context->pix_fmt );
            p_dec->b_error = 1;
            break;
        }
    }
}

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

    /* 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_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;
        }
        else p_ff_pic->pts = 0;
    }
    else p_ff_pic->pts = 0;

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

    p_ff_pic->opaque = 0;

    /* Not much to do in indirect rendering mode */
    if( !p_sys->b_direct_rendering || p_sys->b_pp )
    {
        return avcodec_default_get_buffer( p_context, p_ff_pic );
    }

    /* Some codecs set pix_fmt only after the 1st frame has been decoded,
     * so this check is necessary. */
    if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
        p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
    {
        msg_Dbg( p_dec, "disabling direct rendering" );
        p_sys->b_direct_rendering = 0;
        return avcodec_default_get_buffer( p_context, p_ff_pic );
    }

    /* Get a new picture */
    //p_sys->p_vout->render.b_allow_modify_pics = 0;
    p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
    if( !p_pic )
    {
        p_sys->b_direct_rendering = 0;
        return avcodec_default_get_buffer( p_context, p_ff_pic );
    }
    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
    if( p_ff_pic->reference != 0 )
967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995
    {
        p_dec->pf_picture_link( p_dec, p_pic );
    }

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

    return 0;
}

static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
                                    AVFrame *p_ff_pic )
{
    decoder_t *p_dec = (decoder_t *)p_context->opaque;
    picture_t *p_pic;

    if( !p_ff_pic->opaque )
    {
        avcodec_default_release_buffer( p_context, p_ff_pic );
        return;
    }

    p_pic = (picture_t*)p_ff_pic->opaque;

    p_ff_pic->data[0] = NULL;
    p_ff_pic->data[1] = NULL;
    p_ff_pic->data[2] = NULL;
    p_ff_pic->data[3] = NULL;

996
    if( p_ff_pic->reference != 0 )
997 998 999 1000
    {
        p_dec->pf_picture_unlink( p_dec, p_pic );
    }
}