video.c 33.2 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
#include "chroma.h"
49 50 51 52 53 54

/*****************************************************************************
 * decoder_sys_t : decoder descriptor
 *****************************************************************************/
struct decoder_sys_t
{
55
    FFMPEG_COMMON_MEMBERS
56 57 58 59 60 61 62 63 64 65 66

    /* 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;
67 68
    enum AVDiscard i_skip_frame;
    enum AVDiscard i_skip_idct;
69 70 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 */
    int b_direct_rendering;

77
    bool b_has_b_frames;
78 79

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

    int i_buffer_orig, i_buffer;
    char *p_buffer_orig, *p_buffer;
84 85 86 87


    /* */
    bool b_flush;
88 89 90
};

/* FIXME (dummy palette for now) */
hartman's avatar
hartman committed
91
static const AVPaletteControl palette_control;
92 93 94 95

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
96
static void ffmpeg_InitCodec      ( decoder_t * );
97 98
static void ffmpeg_CopyPicture    ( decoder_t *, picture_t *, AVFrame * );
static int  ffmpeg_GetFrameBuf    ( struct AVCodecContext *, AVFrame * );
99
static int  ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
100
static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
101
static void ffmpeg_NextPts( decoder_t *, int i_block_rate );
102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126

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 )
{
    picture_t *p_pic;

    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 */
    }

127
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
128
    {
129
        /* we are doomed, but not really, because most codecs set their pix_fmt much later */
130 131
        p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
    }
132
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
133 134 135 136 137 138 139 140 141 142 143

    /* 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 );
144 145
        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;
146

147 148 149 150 151 152 153
        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;
        }
    }

154 155 156 157 158 159
    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
160
            p_dec->fmt_in.video.i_frame_rate_base;
161
    }
162
    else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
163 164 165 166
    {
        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;
    }
167 168 169 170 171 172 173 174 175 176 177 178

    p_pic = p_dec->pf_vout_buffer_new( p_dec );

    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
179
int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
180
                      AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
181 182 183 184 185 186 187 188
{
    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 )
    {
189
        return VLC_ENOMEM;
190
    }
191
    memset( p_sys, 0, sizeof(decoder_sys_t) );
192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222

    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;

223 224 225 226 227 228 229 230
    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;

231 232 233 234 235
    /* ***** 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;

236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258
    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;
    }
259
    p_sys->i_skip_frame = p_sys->p_context->skip_frame;
260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283

    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;
    }
284
    p_sys->i_skip_idct = p_sys->p_context->skip_idct;
285

286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312
    /* ***** 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;
    }

    /* 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;
313
    p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
314 315 316 317
    p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
    p_sys->p_context->opaque = p_dec;

    /* ***** init this codec with special data ***** */
318
    ffmpeg_InitCodec( p_dec );
319 320 321 322

    /* ***** misc init ***** */
    p_sys->input_pts = p_sys->input_dts = 0;
    p_sys->i_pts = 0;
323 324
    p_sys->b_has_b_frames = false;
    p_sys->b_first_frame = true;
325
    p_sys->b_flush = false;
326 327 328 329
    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 );
ivoire's avatar
ivoire committed
330 331 332 333 334
    if( !p_sys->p_buffer_orig )
    {
        free( p_sys );
        return VLC_ENOMEM;
    }
335 336 337

    /* Set output properties */
    p_dec->fmt_out.i_cat = VIDEO_ES;
338 339
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
    {
340
        /* we are doomed. but not really, because most codecs set their pix_fmt later on */
341 342 343
        p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
    }
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
344 345 346 347 348

    /* Setup palette */
    if( p_dec->fmt_in.video.p_palette )
        p_sys->p_context->palctrl =
            (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
349
    else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
350
        p_sys->p_context->palctrl = (AVPaletteControl *) &palette_control;
351 352

    /* ***** Open the codec ***** */
Rémi Denis-Courmont's avatar
Typo  
Rémi Denis-Courmont committed
353
    vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
354 355
    if( lock == NULL )
    {
356
        free( p_sys->p_buffer_orig );
357 358 359 360
        free( p_sys );
        return VLC_ENOMEM;
    }

361 362
    if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
    {
363
        vlc_mutex_unlock( lock );
364
        msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
365
        free( p_sys->p_buffer_orig );
366 367 368
        free( p_sys );
        return VLC_EGENERIC;
    }
369
    vlc_mutex_unlock( lock );
370 371 372 373 374 375 376 377 378
    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
379
picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
380 381 382
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    int b_drawpicture;
383
    int b_null_size = false;
384 385 386 387
    block_t *p_block;

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

388 389 390
    if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
        ffmpeg_InitCodec( p_dec );

391 392 393 394 395 396 397 398 399 400 401
    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
402 403 404

        //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
            //avcodec_flush_buffers( p_sys->p_context );
405 406 407 408 409 410 411 412 413 414 415
        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;
    }

416
    if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
417
        (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440
    {
        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 &&
441 442
        p_sys->b_hurry_up &&
        (p_sys->i_late_frames > 4) )
443 444
    {
        b_drawpicture = 0;
445
        if( p_sys->i_late_frames < 12 )
446
        {
447 448 449
            p_sys->p_context->skip_frame =
                    (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
                    AVDISCARD_BIDIR : p_sys->i_skip_frame;
450 451 452 453 454 455 456 457 458 459 460 461 462
        }
        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
    {
463
        if( p_sys->b_hurry_up )
464
            p_sys->p_context->skip_frame = p_sys->i_skip_frame;
Laurent Aimar's avatar
Laurent Aimar committed
465
        if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
466 467 468 469 470 471 472
            b_drawpicture = 1;
        else
            b_drawpicture = 0;
    }

    if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
    {
473
        if( p_sys->b_hurry_up )
474
            p_sys->p_context->skip_frame = p_sys->i_skip_frame;
475
        b_null_size = true;
476 477 478 479 480 481 482 483 484 485
    }

    /*
     * 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 )
    {
486 487
        p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;

488 489 490 491 492 493 494 495 496 497 498
        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;
ivoire's avatar
ivoire committed
499 500 501 502 503
        if( !p_sys->p_buffer )
        {
            block_Release( p_block );
            return NULL;
        }
504
        vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
505 506 507 508 509 510
        memset( p_sys->p_buffer + p_block->i_buffer, 0,
                FF_INPUT_BUFFER_PADDING_SIZE );

        p_block->i_buffer = 0;
    }

511
    while( p_sys->i_buffer > 0 || p_sys->b_flush )
512 513 514 515 516 517
    {
        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,
518 519
                                       p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );

520
        if( b_null_size && p_sys->p_context->width > 0 &&
521 522
            p_sys->p_context->height > 0 &&
            !p_sys->b_flush )
523 524
        {
            /* Reparse it to not drop the I frame */
525
            b_null_size = false;
526
            if( p_sys->b_hurry_up )
527
                p_sys->p_context->skip_frame = p_sys->i_skip_frame;
528 529
            i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
                                           &b_gotpicture,
530
                                           (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
531 532
        }

533 534 535 536 537 538
        if( p_sys->b_flush )
            p_sys->b_first_frame = true;

        if( p_sys->i_buffer <= 0 )
            p_sys->b_flush = false;

539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561
        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;
        }

562 563 564 565
        /* Set the PTS */
        if( p_sys->p_ff_pic->pts )
            p_sys->i_pts = p_sys->p_ff_pic->pts;

566
        /* Update frame late count (except when doing preroll) */
Laurent Aimar's avatar
Laurent Aimar committed
567
        if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
568 569 570 571 572 573 574 575 576 577 578 579 580 581
            !(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
582 583 584
            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 );
585 586

            ffmpeg_NextPts( p_dec, p_block->i_rate );
587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608
            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;
        }

609
        /* Sanity check (seems to be needed for some streams) */
610 611
        if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
        {
612
            p_sys->b_has_b_frames = true;
613 614
        }

615 616 617 618 619 620 621 622 623 624 625
        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;
626

627 628 629 630 631 632 633
            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;
            }
        }

634 635 636
        /* Send decoded frame to vout */
        if( p_sys->i_pts )
        {
637
            int i;
638 639
            p_pic->date = p_sys->i_pts;

640
            ffmpeg_NextPts( p_dec, p_block->i_rate );
641 642 643 644

            if( p_sys->b_first_frame )
            {
                /* Hack to force display of still pictures */
645 646
                p_sys->b_first_frame = false;
                p_pic->b_force = true;
647 648 649 650 651 652
            }

            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;

653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670
            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;
            }

671 672 673 674 675 676 677 678 679 680 681 682 683 684 685
            return p_pic;
        }
        else
        {
            p_dec->pf_vout_buffer_del( p_dec, p_pic );
        }
    }

    block_Release( p_block );
    return NULL;
}

/*****************************************************************************
 * EndVideo: decoder destruction
 *****************************************************************************
686
 * This function is called when the thread ends after a successful
687 688
 * initialization.
 *****************************************************************************/
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
689
void EndVideoDec( decoder_t *p_dec )
690 691 692 693 694 695 696
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
    free( p_sys->p_buffer_orig );
}

697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713
/*****************************************************************************
 * 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
714 715
        if( !p )
            return;
716 717 718 719 720 721 722

        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 &&
723
            strncmp( (char*)&p[0x56], "SMI ", 4 ) )
724 725 726 727 728 729 730 731 732 733 734
        {
            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;
                }
735
                if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753
                {
                    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 );
ivoire's avatar
ivoire committed
754 755 756 757 758
            if( p_sys->p_context->extradata )
            {
                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];
759

ivoire's avatar
ivoire committed
760 761 762
                msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
                          p_sys->p_context->sub_id );
            }
763 764 765 766 767 768 769
        }
    }
    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
770 771 772 773 774 775 776
        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 );
        }
777 778 779
    }
}

780 781 782 783 784 785 786 787 788
/*****************************************************************************
 * 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;

789
    if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
790 791 792 793 794
    {
        int i_plane, i_size, i_line;
        uint8_t *p_dst, *p_src;
        int i_src_stride, i_dst_stride;

795
        for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
796
        {
797 798 799 800 801 802 803 804
            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++ )
805
            {
806 807 808
                vlc_memcpy( p_dst, p_src, i_size );
                p_src += i_src_stride;
                p_dst += i_dst_stride;
809 810 811 812 813
            }
        }
    }
    else
    {
814 815 816
        msg_Err( p_dec, "don't know how to convert chroma %i",
                 p_sys->p_context->pix_fmt );
        p_dec->b_error = 1;
817 818 819 820 821 822 823 824 825
    }
}

/*****************************************************************************
 * 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).
 *****************************************************************************/
826 827
static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );

828 829 830 831 832 833 834 835
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 */
836
    ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
837

838
    /* */
839 840 841
    p_ff_pic->opaque = 0;

    /* Not much to do in indirect rendering mode */
842
    if( !p_sys->b_direct_rendering )
843 844 845 846 847
    {
        return avcodec_default_get_buffer( p_context, p_ff_pic );
    }

    /* Some codecs set pix_fmt only after the 1st frame has been decoded,
848 849 850 851 852 853
     * 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 );

854
    if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
855 856 857
        p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
        /* We only pad picture up to 16 */
        PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height )
858 859 860 861 862
    {
        msg_Dbg( p_dec, "disabling direct rendering" );
        p_sys->b_direct_rendering = 0;
        return avcodec_default_get_buffer( p_context, p_ff_pic );
    }
863
    p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886

    /* 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;

887
    if( p_ff_pic->reference != 0 )
888 889 890 891 892 893 894 895 896
    {
        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;
}
897 898 899
static int  ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
{
    decoder_t *p_dec = (decoder_t *)p_context->opaque;
900
    int i_ret;
901

902 903
    /* */
    p_ff_pic->pts = AV_NOPTS_VALUE;
904 905

    /* We always use default reget function, it works perfectly fine */
906 907 908 909 910 911 912 913
    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;
914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933
}

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;
        }
934 935 936 937 938 939 940 941
        else
        {
            p_ff_pic->pts = 0;
        }
    }
    else
    {
        p_ff_pic->pts = 0;
942 943 944 945 946 947 948
    }

    if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
    {
        p_sys->input_pts = p_sys->input_dts = 0;
    }
}
949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968

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;

969
    if( p_ff_pic->reference != 0 )
970 971 972 973
    {
        p_dec->pf_picture_unlink( p_dec, p_pic );
    }
}
974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000

static void ffmpeg_NextPts( decoder_t *p_dec, int i_block_rate )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    if( p_sys->i_pts <= 0 )
        return;

    /* interpolate the next PTS */
    if( p_dec->fmt_in.video.i_frame_rate > 0 &&
        p_dec->fmt_in.video.i_frame_rate_base > 0 )
    {
        p_sys->i_pts += INT64_C(1000000) *
            (2 + p_sys->p_ff_pic->repeat_pict) *
            p_dec->fmt_in.video.i_frame_rate_base *
            i_block_rate / INPUT_RATE_DEFAULT /
            (2 * p_dec->fmt_in.video.i_frame_rate);
    }
    else if( p_sys->p_context->time_base.den > 0 )
    {
        p_sys->i_pts += INT64_C(1000000) *
            (2 + p_sys->p_ff_pic->repeat_pict) *
            p_sys->p_context->time_base.num *
            i_block_rate / INPUT_RATE_DEFAULT /
            (2 * p_sys->p_context->time_base.den);
    }
}