h264.c 34.9 KB
Newer Older
1 2 3
/*****************************************************************************
 * h264.c: h264/avc video packetizer
 *****************************************************************************
Jean-Baptiste Kempf's avatar
LGPL  
Jean-Baptiste Kempf committed
4
 * Copyright (C) 2001, 2002, 2006 VLC authors and VideoLAN
5
 * $Id$
6 7 8
 *
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
 *          Eric Petit <titer@videolan.org>
9
 *          Gildas Bazin <gbazin@videolan.org>
10
 *          Derk-Jan Hartman <hartman at videolan dot org>
11
 *
Jean-Baptiste Kempf's avatar
LGPL  
Jean-Baptiste Kempf committed
12 13 14
 * 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
15 16 17 18
 * (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
19 20
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
21
 *
Jean-Baptiste Kempf's avatar
LGPL  
Jean-Baptiste Kempf committed
22 23 24
 * 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.
25 26 27 28 29 30
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/

31 32 33 34
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

35
#include <vlc_common.h>
36
#include <vlc_plugin.h>
Clément Stenac's avatar
Clément Stenac committed
37 38 39
#include <vlc_sout.h>
#include <vlc_codec.h>
#include <vlc_block.h>
40

41 42
#include <vlc_block_helper.h>
#include <vlc_bits.h>
43
#include "../codec/cc.h"
44
#include "h264_nal.h"
45
#include "packetizer_helper.h"
46
#include "../demux/mpeg/mpeg_parser_helpers.h"
47 48 49 50 51 52 53

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
static int  Open ( vlc_object_t * );
static void Close( vlc_object_t * );

54 55 56 57 58 59 60
vlc_module_begin ()
    set_category( CAT_SOUT )
    set_subcategory( SUBCAT_SOUT_PACKETIZER )
    set_description( N_("H.264 video packetizer") )
    set_capability( "packetizer", 50 )
    set_callbacks( Open, Close )
vlc_module_end ()
61 62 63 64 65


/****************************************************************************
 * Local prototypes
 ****************************************************************************/
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
typedef struct
{
    int i_nal_type;
    int i_nal_ref_idc;

    int i_frame_type;
    int i_pic_parameter_set_id;
    int i_frame_num;

    int i_field_pic_flag;
    int i_bottom_field_flag;

    int i_idr_pic_id;

    int i_pic_order_cnt_lsb;
    int i_delta_pic_order_cnt_bottom;

    int i_delta_pic_order_cnt0;
    int i_delta_pic_order_cnt1;
} slice_t;

87 88
struct decoder_sys_t
{
89 90
    /* */
    packetizer_t packetizer;
91

92
    /* */
93 94
    bool    b_slice;
    block_t *p_frame;
95 96
    bool    b_frame_sps;
    bool    b_frame_pps;
97

98
    bool   b_header;
99 100
    bool   b_sps;
    bool   b_pps;
101 102
    block_t *pp_sps[SPS_MAX];
    block_t *pp_pps[PPS_MAX];
103
    int    i_recovery_frames;  /* -1 = no recovery */
104 105 106

    /* avcC data */
    int i_avcC_length_size;
107 108 109 110

    /* Useful values of the Sequence Parameter Set */
    int i_log2_max_frame_num;
    int b_frame_mbs_only;
111 112 113 114 115 116
    int i_pic_order_cnt_type;
    int i_delta_pic_order_always_zero_flag;
    int i_log2_max_pic_order_cnt_lsb;

    /* Value from Picture Parameter Set */
    int i_pic_order_present_flag;
117

118 119 120 121 122 123 124 125 126 127 128
    /* VUI */
    bool b_timing_info_present_flag;
    uint32_t i_num_units_in_tick;
    uint32_t i_time_scale;
    bool b_fixed_frame_rate;
    bool b_pic_struct_present_flag;
    uint8_t i_pic_struct;
    bool b_cpb_dpb_delays_present_flag;
    uint8_t i_cpb_removal_delay_length_minus1;
    uint8_t i_dpb_output_delay_length_minus1;

129
    /* Useful values of the Slice Header */
130
    slice_t slice;
Laurent Aimar's avatar
Laurent Aimar committed
131 132

    /* */
133
    bool b_even_frame;
Laurent Aimar's avatar
Laurent Aimar committed
134 135
    mtime_t i_frame_pts;
    mtime_t i_frame_dts;
136 137
    mtime_t i_prev_pts;
    mtime_t i_prev_dts;
138 139 140 141 142 143

    /* */
    uint32_t i_cc_flags;
    mtime_t i_cc_pts;
    mtime_t i_cc_dts;
    cc_data_t cc;
144 145

    cc_data_t cc_next;
146 147
};

148 149
#define BLOCK_FLAG_PRIVATE_AUD (1 << BLOCK_FLAG_PRIVATE_SHIFT)

150 151 152
static block_t *Packetize( decoder_t *, block_t ** );
static block_t *PacketizeAVC1( decoder_t *, block_t ** );
static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] );
153
static void PacketizeFlush( decoder_t * );
154

155 156 157 158
static void PacketizeReset( void *p_private, bool b_broken );
static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t * );
static int PacketizeValidate( void *p_private, block_t * );

159
static block_t *ParseNALBlock( decoder_t *, bool *pb_ts_used, block_t * );
Laurent Aimar's avatar
Laurent Aimar committed
160
static block_t *CreateAnnexbNAL( decoder_t *, const uint8_t *p, int );
161

162 163 164 165 166
static block_t *OutputPicture( decoder_t *p_dec );
static void PutSPS( decoder_t *p_dec, block_t *p_frag );
static void PutPPS( decoder_t *p_dec, block_t *p_frag );
static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
                        int i_nal_ref_idc, int i_nal_type, const block_t *p_frag );
167
static void ParseSei( decoder_t *, block_t * );
168 169


170 171
static const uint8_t p_h264_startcode[3] = { 0x00, 0x00, 0x01 };

172 173
/*****************************************************************************
 * Open: probe the packetizer and return score
174 175
 * When opening after demux, the packetizer is only loaded AFTER the decoder
 * That means that what you set in fmt_out is ignored by the decoder in this special case
176 177 178 179 180
 *****************************************************************************/
static int Open( vlc_object_t *p_this )
{
    decoder_t     *p_dec = (decoder_t*)p_this;
    decoder_sys_t *p_sys;
181
    int i;
182

183 184 185 186
    if( p_dec->fmt_in.i_codec != VLC_CODEC_H264 )
        return VLC_EGENERIC;
    if( p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1') &&
        p_dec->fmt_in.i_extra < 7 )
187 188 189 190 191
        return VLC_EGENERIC;

    /* Allocate the memory needed to store the decoder's structure */
    if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
    {
192
        return VLC_ENOMEM;
193
    }
194 195 196

    packetizer_Init( &p_sys->packetizer,
                     p_h264_startcode, sizeof(p_h264_startcode),
197
                     p_h264_startcode, 1, 5,
198 199
                     PacketizeReset, PacketizeParse, PacketizeValidate, p_dec );

200
    p_sys->b_slice = false;
201
    p_sys->p_frame = NULL;
202 203 204
    p_sys->b_frame_sps = false;
    p_sys->b_frame_pps = false;

205
    p_sys->b_header= false;
206 207
    p_sys->b_sps   = false;
    p_sys->b_pps   = false;
208 209 210 211
    for( i = 0; i < SPS_MAX; i++ )
        p_sys->pp_sps[i] = NULL;
    for( i = 0; i < PPS_MAX; i++ )
        p_sys->pp_pps[i] = NULL;
212
    p_sys->i_recovery_frames = -1;
213

214 215 216 217 218 219 220 221 222 223
    p_sys->slice.i_nal_type = -1;
    p_sys->slice.i_nal_ref_idc = -1;
    p_sys->slice.i_idr_pic_id = -1;
    p_sys->slice.i_frame_num = -1;
    p_sys->slice.i_frame_type = 0;
    p_sys->slice.i_pic_parameter_set_id = -1;
    p_sys->slice.i_field_pic_flag = 0;
    p_sys->slice.i_bottom_field_flag = -1;
    p_sys->slice.i_pic_order_cnt_lsb = -1;
    p_sys->slice.i_delta_pic_order_cnt_bottom = -1;
224

225 226 227 228 229 230
    p_sys->b_timing_info_present_flag = false;
    p_sys->b_pic_struct_present_flag = false;
    p_sys->b_cpb_dpb_delays_present_flag = false;
    p_sys->i_cpb_removal_delay_length_minus1 = 0;
    p_sys->i_dpb_output_delay_length_minus1 = 0;

231
    p_sys->b_even_frame = false;
232 233
    p_sys->i_frame_dts = VLC_TS_INVALID;
    p_sys->i_frame_pts = VLC_TS_INVALID;
234 235
    p_sys->i_prev_dts = VLC_TS_INVALID;
    p_sys->i_prev_pts = VLC_TS_INVALID;
Laurent Aimar's avatar
Laurent Aimar committed
236

237 238
    /* Setup properties */
    es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
239
    p_dec->fmt_out.i_codec = VLC_CODEC_H264;
240

241
    if( p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1' ) )
242
    {
243 244 245 246
        /* This type of stream is produced by mp4 and matroska
         * when we want to store it in another streamformat, you need to convert
         * The fmt_in.p_extra should ALWAYS contain the avcC
         * The fmt_out.p_extra should contain all the SPS and PPS with 4 byte startcodes */
247 248
        uint8_t *p = &((uint8_t*)p_dec->fmt_in.p_extra)[4];
        int i_sps, i_pps;
Laurent Aimar's avatar
Laurent Aimar committed
249
        bool b_dummy;
250 251 252 253 254 255 256 257 258
        int i;

        /* Parse avcC */
        p_sys->i_avcC_length_size = 1 + ((*p++)&0x03);

        /* Read SPS */
        i_sps = (*p++)&0x1f;
        for( i = 0; i < i_sps; i++ )
        {
259 260 261 262 263 264
            uint16_t i_length = GetWBE( p ); p += 2;
            if( i_length >
                (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
            {
                return VLC_EGENERIC;
            }
Laurent Aimar's avatar
Laurent Aimar committed
265
            block_t *p_sps = CreateAnnexbNAL( p_dec, p, i_length );
266 267
            if( !p_sps )
                return VLC_EGENERIC;
Laurent Aimar's avatar
Laurent Aimar committed
268
            ParseNALBlock( p_dec, &b_dummy, p_sps );
269
            p += i_length;
270 271 272 273 274
        }
        /* Read PPS */
        i_pps = *p++;
        for( i = 0; i < i_pps; i++ )
        {
275 276 277 278 279 280
            uint16_t i_length = GetWBE( p ); p += 2;
            if( i_length >
                (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
            {
                return VLC_EGENERIC;
            }
Laurent Aimar's avatar
Laurent Aimar committed
281
            block_t *p_pps = CreateAnnexbNAL( p_dec, p, i_length );
282 283
            if( !p_pps )
                return VLC_EGENERIC;
Laurent Aimar's avatar
Laurent Aimar committed
284
            ParseNALBlock( p_dec, &b_dummy, p_pps );
285
            p += i_length;
286
        }
287
        msg_Dbg( p_dec, "avcC length size=%d, sps=%d, pps=%d",
288 289
                 p_sys->i_avcC_length_size, i_sps, i_pps );

290
        if( !p_sys->b_sps || !p_sys->b_pps )
291 292
            return VLC_EGENERIC;

293
        /* FIXME: FFMPEG isn't happy at all if you leave this */
294 295
        if( p_dec->fmt_out.i_extra > 0 )
            free( p_dec->fmt_out.p_extra );
296 297
        p_dec->fmt_out.i_extra = 0;
        p_dec->fmt_out.p_extra = NULL;
298

299
        /* Set the new extradata */
300 301 302 303 304 305 306 307 308 309
        for( i = 0; i < SPS_MAX; i++ )
        {
            if( p_sys->pp_sps[i] )
                p_dec->fmt_out.i_extra += p_sys->pp_sps[i]->i_buffer;
        }
        for( i = 0; i < PPS_MAX; i++ )
        {
            if( p_sys->pp_pps[i] )
                p_dec->fmt_out.i_extra += p_sys->pp_pps[i]->i_buffer;
        }
310
        p_dec->fmt_out.p_extra = malloc( p_dec->fmt_out.i_extra );
311 312
        if( p_dec->fmt_out.p_extra )
        {
313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330
            uint8_t *p_dst = p_dec->fmt_out.p_extra;

            for( i = 0; i < SPS_MAX; i++ )
            {
                if( p_sys->pp_sps[i] )
                {
                    memcpy( p_dst, p_sys->pp_sps[i]->p_buffer, p_sys->pp_sps[i]->i_buffer );
                    p_dst += p_sys->pp_sps[i]->i_buffer;
                }
            }
            for( i = 0; i < PPS_MAX; i++ )
            {
                if( p_sys->pp_pps[i] )
                {
                    memcpy( p_dst, p_sys->pp_pps[i]->p_buffer, p_sys->pp_pps[i]->i_buffer );
                    p_dst += p_sys->pp_pps[i]->i_buffer;
                }
            }
331
            p_sys->b_header = true;
332
        }
333 334 335 336
        else
        {
            p_dec->fmt_out.i_extra = 0;
        }
337

338 339
        /* Set callback */
        p_dec->pf_packetize = PacketizeAVC1;
340 341 342
    }
    else
    {
343
        /* This type of stream contains data with 3 of 4 byte startcodes
344 345
         * The fmt_in.p_extra MAY contain SPS/PPS with 4 byte startcodes
         * The fmt_out.p_extra should be the same */
346

347 348
        /* Set callback */
        p_dec->pf_packetize = Packetize;
349 350 351

        /* */
        if( p_dec->fmt_in.i_extra > 0 )
352 353
            packetizer_Header( &p_sys->packetizer,
                               p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
354 355
    }

356 357
    /* CC are the same for H264/AVC in T35 sections (ETSI TS 101 154)  */
    p_dec->pf_get_cc = GetCc;
358
    p_dec->pf_flush = PacketizeFlush;
359 360 361 362 363 364 365 366

    /* */
    p_sys->i_cc_pts = VLC_TS_INVALID;
    p_sys->i_cc_dts = VLC_TS_INVALID;
    p_sys->i_cc_flags = 0;
    cc_Init( &p_sys->cc );
    cc_Init( &p_sys->cc_next );

367 368 369 370 371 372 373 374 375 376
    return VLC_SUCCESS;
}

/*****************************************************************************
 * Close: clean up the packetizer
 *****************************************************************************/
static void Close( vlc_object_t *p_this )
{
    decoder_t *p_dec = (decoder_t*)p_this;
    decoder_sys_t *p_sys = p_dec->p_sys;
377
    int i;
378

379 380
    if( p_sys->p_frame )
        block_ChainRelease( p_sys->p_frame );
381 382 383 384 385 386 387 388 389 390
    for( i = 0; i < SPS_MAX; i++ )
    {
        if( p_sys->pp_sps[i] )
            block_Release( p_sys->pp_sps[i] );
    }
    for( i = 0; i < PPS_MAX; i++ )
    {
        if( p_sys->pp_pps[i] )
            block_Release( p_sys->pp_pps[i] );
    }
391 392
    packetizer_Clean( &p_sys->packetizer );

393 394
    cc_Exit( &p_sys->cc_next );
    cc_Exit( &p_sys->cc );
395

396 397 398
    free( p_sys );
}

399 400 401 402 403 404 405
static void PacketizeFlush( decoder_t *p_dec )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    packetizer_Flush( &p_sys->packetizer );
}

406 407
/****************************************************************************
 * Packetize: the whole thing
408 409
 * Search for the startcodes 3 or more bytes
 * Feed ParseNALBlock ALWAYS with 4 byte startcode prepended NALs
410 411 412 413 414
 ****************************************************************************/
static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

415
    return packetizer_Packetize( &p_sys->packetizer, pp_block );
416 417
}

418
/****************************************************************************
419 420
 * PacketizeAVC1: Takes VCL blocks of data and creates annexe B type NAL stream
 * Will always use 4 byte 0 0 0 1 startcodes
421
 * Will prepend a SPS and PPS before each keyframe
422 423 424 425 426 427 428 429
 ****************************************************************************/
static block_t *PacketizeAVC1( decoder_t *p_dec, block_t **pp_block )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    block_t       *p_block;
    block_t       *p_ret = NULL;
    uint8_t       *p;

430 431
    if( !pp_block || !*pp_block )
        return NULL;
432
    if( (*pp_block)->i_flags&(BLOCK_FLAG_CORRUPTED) )
433 434 435 436
    {
        block_Release( *pp_block );
        return NULL;
    }
437 438 439 440 441 442 443

    p_block = *pp_block;
    *pp_block = NULL;

    for( p = p_block->p_buffer; p < &p_block->p_buffer[p_block->i_buffer]; )
    {
        block_t *p_pic;
Laurent Aimar's avatar
Laurent Aimar committed
444
        bool b_dummy;
445 446 447 448 449 450 451 452
        int i_size = 0;
        int i;

        for( i = 0; i < p_sys->i_avcC_length_size; i++ )
        {
            i_size = (i_size << 8) | (*p++);
        }

453
        if( i_size <= 0 ||
454
            i_size > ( p_block->p_buffer + p_block->i_buffer - p ) )
455
        {
456 457 458
            msg_Err( p_dec, "Broken frame : size %d is too big", i_size );
            break;
        }
459

Laurent Aimar's avatar
Laurent Aimar committed
460
        block_t *p_part = CreateAnnexbNAL( p_dec, p, i_size );
461 462
        if( !p_part )
            break;
Laurent Aimar's avatar
Laurent Aimar committed
463

464 465 466 467
        p_part->i_dts = p_block->i_dts;
        p_part->i_pts = p_block->i_pts;

        /* Parse the NAL */
Laurent Aimar's avatar
Laurent Aimar committed
468
        if( ( p_pic = ParseNALBlock( p_dec, &b_dummy, p_part ) ) )
469 470
        {
            block_ChainAppend( &p_ret, p_pic );
471 472 473
        }
        p += i_size;
    }
474
    block_Release( p_block );
475 476 477 478

    return p_ret;
}

479 480 481 482 483 484 485 486 487 488 489 490 491 492
/*****************************************************************************
 * GetCc:
 *****************************************************************************/
static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    block_t *p_cc;

    for( int i = 0; i < 4; i++ )
        pb_present[i] = p_sys->cc.pb_present[i];

    if( p_sys->cc.i_data <= 0 )
        return NULL;

493
    p_cc = block_Alloc( p_sys->cc.i_data);
494 495 496 497 498 499 500 501 502 503 504
    if( p_cc )
    {
        memcpy( p_cc->p_buffer, p_sys->cc.p_data, p_sys->cc.i_data );
        p_cc->i_dts =
        p_cc->i_pts = p_sys->cc.b_reorder ? p_sys->i_cc_pts : p_sys->i_cc_dts;
        p_cc->i_flags = ( p_sys->cc.b_reorder  ? p_sys->i_cc_flags : BLOCK_FLAG_TYPE_P ) & BLOCK_FLAG_TYPE_MASK;
    }
    cc_Flush( &p_sys->cc );
    return p_cc;
}

Laurent Aimar's avatar
Laurent Aimar committed
505 506 507
/****************************************************************************
 * Helpers
 ****************************************************************************/
508 509 510 511 512 513 514 515 516 517
static void PacketizeReset( void *p_private, bool b_broken )
{
    decoder_t *p_dec = p_private;
    decoder_sys_t *p_sys = p_dec->p_sys;

    if( b_broken )
    {
        if( p_sys->p_frame )
            block_ChainRelease( p_sys->p_frame );
        p_sys->p_frame = NULL;
518 519
        p_sys->b_frame_sps = false;
        p_sys->b_frame_pps = false;
520 521 522
        p_sys->slice.i_frame_type = 0;
        p_sys->b_slice = false;
    }
523 524
    p_sys->i_frame_pts = VLC_TS_INVALID;
    p_sys->i_frame_dts = VLC_TS_INVALID;
525 526 527
    p_sys->i_prev_dts = VLC_TS_INVALID;
    p_sys->i_prev_pts = VLC_TS_INVALID;
    p_sys->b_even_frame = false;
528 529 530 531 532 533
}
static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t *p_block )
{
    decoder_t *p_dec = p_private;

    /* Remove trailing 0 bytes */
534
    while( p_block->i_buffer > 5 && p_block->p_buffer[p_block->i_buffer-1] == 0x00 )
535 536 537 538 539 540 541 542 543 544 545
        p_block->i_buffer--;

    return ParseNALBlock( p_dec, pb_ts_used, p_block );
}
static int PacketizeValidate( void *p_private, block_t *p_au )
{
    VLC_UNUSED(p_private);
    VLC_UNUSED(p_au);
    return VLC_SUCCESS;
}

Laurent Aimar's avatar
Laurent Aimar committed
546
static block_t *CreateAnnexbNAL( decoder_t *p_dec, const uint8_t *p, int i_size )
547 548 549
{
    block_t *p_nal;

550
    p_nal = block_Alloc( 4 + i_size );
551
    if( !p_nal ) return NULL;
552

553 554 555
    /* Add start code */
    p_nal->p_buffer[0] = 0x00;
    p_nal->p_buffer[1] = 0x00;
556 557
    p_nal->p_buffer[2] = 0x00;
    p_nal->p_buffer[3] = 0x01;
558

559
    /* Copy nalu */
560
    memcpy( &p_nal->p_buffer[4], p, i_size );
561

562
    VLC_UNUSED(p_dec);
563 564 565
    return p_nal;
}

566 567
/*****************************************************************************
 * ParseNALBlock: parses annexB type NALs
568
 * All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
569
 *****************************************************************************/
570
static block_t *ParseNALBlock( decoder_t *p_dec, bool *pb_ts_used, block_t *p_frag )
571 572 573 574
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    block_t *p_pic = NULL;

575 576
    const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
    const int i_nal_type = p_frag->p_buffer[4]&0x1f;
Laurent Aimar's avatar
Laurent Aimar committed
577 578
    const mtime_t i_frag_dts = p_frag->i_dts;
    const mtime_t i_frag_pts = p_frag->i_pts;
579

580
    if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
581
    {
582
        block_ChainRelease( p_sys->p_frame );
583
        msg_Warn( p_dec, "waiting for SPS/PPS" );
584

585
        /* Reset context */
586
        p_sys->slice.i_frame_type = 0;
587
        p_sys->p_frame = NULL;
588 589
        p_sys->b_frame_sps = false;
        p_sys->b_frame_pps = false;
590
        p_sys->b_slice = false;
591
        cc_Flush( &p_sys->cc_next );
592 593
    }

594
    if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
595 596
        i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
    {
597
        p_sys->b_slice = true;
598 599 600
        /* Fragment will be discarded later on */
    }
    else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
601
    {
602
        slice_t slice;
Laurent Aimar's avatar
Laurent Aimar committed
603
        bool  b_new_picture;
604

605
        ParseSlice( p_dec, &b_new_picture, &slice, i_nal_ref_idc, i_nal_type, p_frag );
606

607
        /* */
608 609
        if( b_new_picture && p_sys->b_slice )
            p_pic = OutputPicture( p_dec );
610 611 612

        /* */
        p_sys->slice = slice;
613 614 615 616 617
        p_sys->b_slice = true;
    }
    else if( i_nal_type == NAL_SPS )
    {
        if( p_sys->b_slice )
618
            p_pic = OutputPicture( p_dec );
619
        p_sys->b_frame_sps = true;
620

621
        PutSPS( p_dec, p_frag );
622

623
        /* Do not append the SPS because we will insert it on keyframes */
Laurent Aimar's avatar
Laurent Aimar committed
624
        p_frag = NULL;
625
    }
626
    else if( i_nal_type == NAL_PPS )
627
    {
628 629
        if( p_sys->b_slice )
            p_pic = OutputPicture( p_dec );
630
        p_sys->b_frame_pps = true;
631 632

        PutPPS( p_dec, p_frag );
633

634
        /* Do not append the PPS because we will insert it on keyframes */
Laurent Aimar's avatar
Laurent Aimar committed
635
        p_frag = NULL;
636 637 638 639 640
    }
    else if( i_nal_type == NAL_AU_DELIMITER ||
             i_nal_type == NAL_SEI ||
             ( i_nal_type >= 13 && i_nal_type <= 18 ) )
    {
641 642
        if( p_sys->b_slice )
            p_pic = OutputPicture( p_dec );
Laurent Aimar's avatar
Laurent Aimar committed
643

644
        /* Parse SEI for CC support */
645
        if( i_nal_type == NAL_SEI )
646
        {
647
            ParseSei( p_dec, p_frag );
648 649 650 651 652 653 654 655 656 657 658 659 660
        }
        else if( i_nal_type == NAL_AU_DELIMITER )
        {
            if( p_sys->p_frame && (p_sys->p_frame->i_flags & BLOCK_FLAG_PRIVATE_AUD) )
            {
                block_Release( p_frag );
                p_frag = NULL;
            }
            else
            {
                p_frag->i_flags |= BLOCK_FLAG_PRIVATE_AUD;
            }
        }
661 662
    }

663
    /* Append the block */
Laurent Aimar's avatar
Laurent Aimar committed
664 665
    if( p_frag )
        block_ChainAppend( &p_sys->p_frame, p_frag );
666

667
    *pb_ts_used = false;
668
    if( p_sys->i_frame_dts <= VLC_TS_INVALID &&
669
        p_sys->i_frame_pts <= VLC_TS_INVALID )
Laurent Aimar's avatar
Laurent Aimar committed
670 671 672
    {
        p_sys->i_frame_dts = i_frag_dts;
        p_sys->i_frame_pts = i_frag_pts;
673
        *pb_ts_used = true;
Laurent Aimar's avatar
Laurent Aimar committed
674
    }
675 676
    return p_pic;
}
677

678 679 680 681
static block_t *OutputPicture( decoder_t *p_dec )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    block_t *p_pic;
682

683 684 685 686 687 688 689 690 691 692 693 694
    if ( !p_sys->b_header && p_sys->i_recovery_frames != -1 )
    {
        if( p_sys->i_recovery_frames == 0 )
        {
            msg_Dbg( p_dec, "Recovery from SEI recovery point complete" );
            p_sys->b_header = true;
        }
        --p_sys->i_recovery_frames;
    }

    if( !p_sys->b_header && p_sys->i_recovery_frames == -1 &&
         p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I)
695 696
        return NULL;

697 698 699 700
    const bool b_sps_pps_i = p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I &&
                             p_sys->b_sps &&
                             p_sys->b_pps;
    if( b_sps_pps_i || p_sys->b_frame_sps || p_sys->b_frame_pps )
701
    {
702 703 704 705 706 707
        block_t *p_head = NULL;
        if( p_sys->p_frame->i_flags & BLOCK_FLAG_PRIVATE_AUD )
        {
            p_head = p_sys->p_frame;
            p_sys->p_frame = p_sys->p_frame->p_next;
        }
708

709
        block_t *p_list = NULL;
710
        for( int i = 0; i < SPS_MAX && (b_sps_pps_i || p_sys->b_frame_sps); i++ )
711 712 713 714
        {
            if( p_sys->pp_sps[i] )
                block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_sps[i] ) );
        }
715
        for( int i = 0; i < PPS_MAX && (b_sps_pps_i || p_sys->b_frame_pps); i++ )
716 717 718 719
        {
            if( p_sys->pp_pps[i] )
                block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_pps[i] ) );
        }
720
        if( b_sps_pps_i && p_list )
721
            p_sys->b_header = true;
Laurent Aimar's avatar
Laurent Aimar committed
722

723 724 725 726 727 728 729
        if( p_head )
            p_head->p_next = p_list;
        else
            p_head = p_list;
        block_ChainAppend( &p_head, p_sys->p_frame );

        p_pic = block_ChainGather( p_head );
730 731 732 733 734
    }
    else
    {
        p_pic = block_ChainGather( p_sys->p_frame );
    }
735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750

    unsigned i_num_clock_ts = 1;
    if( p_sys->b_frame_mbs_only == 0 && p_sys->b_pic_struct_present_flag )
    {
        if( p_sys->i_pic_struct < 9 )
        {
            const uint8_t rgi_numclock[9] = { 1, 1, 1, 2, 2, 3, 3, 2, 3 };
            i_num_clock_ts = rgi_numclock[ p_sys->i_pic_struct ];
        }
    }

    if( p_sys->i_time_scale )
    {
        p_pic->i_length = CLOCK_FREQ * i_num_clock_ts *
                          p_sys->i_num_units_in_tick / p_sys->i_time_scale;
    }
751

752 753 754 755 756
    if( p_sys->b_frame_mbs_only == 0 && p_sys->b_pic_struct_present_flag )
    {
        switch( p_sys->i_pic_struct )
        {
        case 1:
757 758 759 760 761 762 763 764 765 766 767 768
        case 2:
            if( !p_sys->b_even_frame )
            {
                p_pic->i_flags |= (p_sys->i_pic_struct == 1) ? BLOCK_FLAG_TOP_FIELD_FIRST
                                                             : BLOCK_FLAG_BOTTOM_FIELD_FIRST;
            }
            else if( p_pic->i_pts <= VLC_TS_INVALID && p_sys->i_prev_pts > VLC_TS_INVALID )
            {
                /* interpolate from even frame */
                p_pic->i_pts = p_sys->i_prev_pts + p_pic->i_length;
            }
            p_sys->b_even_frame = !p_sys->b_even_frame;
769 770 771
            break;
        case 3:
            p_pic->i_flags |= BLOCK_FLAG_TOP_FIELD_FIRST;
772
            p_sys->b_even_frame = false;
773 774
            break;
        case 4:
775 776 777 778 779 780
            p_pic->i_flags |= BLOCK_FLAG_BOTTOM_FIELD_FIRST;
            p_sys->b_even_frame = false;
            break;
        case 5:
            p_pic->i_flags |= BLOCK_FLAG_TOP_FIELD_FIRST;
            break;
781 782 783 784
        case 6:
            p_pic->i_flags |= BLOCK_FLAG_BOTTOM_FIELD_FIRST;
            break;
        default:
785
            p_sys->b_even_frame = false;
786 787 788 789
            break;
        }
    }

790 791 792 793 794 795 796 797 798 799 800 801 802 803
    if( p_sys->i_frame_dts <= VLC_TS_INVALID )
        p_sys->i_frame_dts = p_sys->i_prev_dts;

    p_pic->i_dts = p_sys->i_frame_dts;
    p_pic->i_pts = p_sys->i_frame_pts;
    p_pic->i_flags |= p_sys->slice.i_frame_type;
    p_pic->i_flags &= ~BLOCK_FLAG_PRIVATE_AUD;
    if( !p_sys->b_header )
        p_pic->i_flags |= BLOCK_FLAG_PREROLL;

    p_sys->i_prev_dts = p_sys->i_frame_dts;
    p_sys->i_prev_pts = p_sys->i_frame_pts;
    p_sys->i_frame_dts = VLC_TS_INVALID;
    p_sys->i_frame_pts = VLC_TS_INVALID;
804

805 806
    p_sys->slice.i_frame_type = 0;
    p_sys->p_frame = NULL;
807 808
    p_sys->b_frame_sps = false;
    p_sys->b_frame_pps = false;
809 810
    p_sys->b_slice = false;

811 812 813 814 815
    /* CC */
    p_sys->i_cc_pts = p_pic->i_pts;
    p_sys->i_cc_dts = p_pic->i_dts;
    p_sys->i_cc_flags = p_pic->i_flags;

816 817 818
    p_sys->cc = p_sys->cc_next;
    cc_Flush( &p_sys->cc_next );

819 820
    return p_pic;
}
821

822 823 824
static void PutSPS( decoder_t *p_dec, block_t *p_frag )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
825
    struct nal_sps sps;
826

827
    if( h264_parse_sps( p_frag->p_buffer, p_frag->i_buffer, &sps ) != 0 )
828
    {
829
        msg_Warn( p_dec, "invalid SPS (sps_id=%d)", sps.i_id );
830 831 832 833
        block_Release( p_frag );
        return;
    }

834 835 836 837 838
    p_dec->fmt_out.i_profile = sps.i_profile;
    p_dec->fmt_out.i_level = sps.i_level;
    p_dec->fmt_out.video.i_width  = sps.i_width;
    p_dec->fmt_out.video.i_height = sps.i_height;
    if( sps.vui.i_sar_num != 0 && sps.vui.i_sar_den != 0 )
839
    {
840 841
        p_dec->fmt_out.video.i_sar_num = sps.vui.i_sar_num;
        p_dec->fmt_out.video.i_sar_den = sps.vui.i_sar_den;
842
    }
843

844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859
    p_sys->i_log2_max_frame_num = sps.i_log2_max_frame_num;
    p_sys->b_frame_mbs_only = sps.b_frame_mbs_only;
    p_sys->i_pic_order_cnt_type = sps.i_pic_order_cnt_type;
    p_sys->i_delta_pic_order_always_zero_flag = sps.i_delta_pic_order_always_zero_flag;
    p_sys->i_log2_max_pic_order_cnt_lsb = sps.i_log2_max_pic_order_cnt_lsb;

    if( sps.vui.b_valid )
    {
        p_sys->b_timing_info_present_flag = sps.vui.b_timing_info_present_flag;
        p_sys->i_num_units_in_tick =  sps.vui.i_num_units_in_tick;
        p_sys->i_time_scale = sps.vui.i_time_scale;
        p_sys->b_fixed_frame_rate = sps.vui.b_fixed_frame_rate;
        p_sys->b_pic_struct_present_flag = sps.vui.b_pic_struct_present_flag;
        p_sys->b_cpb_dpb_delays_present_flag = sps.vui.b_cpb_dpb_delays_present_flag;
        p_sys->i_cpb_removal_delay_length_minus1 = sps.vui.i_cpb_removal_delay_length_minus1;
        p_sys->i_dpb_output_delay_length_minus1 = sps.vui.i_dpb_output_delay_length_minus1;
860
    }
861

862
    /* We have a new SPS */
863
    if( !p_sys->b_sps )
864
        msg_Dbg( p_dec, "found NAL_SPS (sps_id=%d)", sps.i_id );
865 866
    p_sys->b_sps = true;

867 868 869
    if( p_sys->pp_sps[sps.i_id] )
        block_Release( p_sys->pp_sps[sps.i_id] );
    p_sys->pp_sps[sps.i_id] = p_frag;
870
}
871

872 873 874
static void PutPPS( decoder_t *p_dec, block_t *p_frag )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
875
    struct nal_pps pps;
876

877
    if( h264_parse_pps( p_frag->p_buffer, p_frag->i_buffer, &pps ) != 0 )
878
    {
879
        msg_Warn( p_dec, "invalid PPS (pps_id=%d sps_id=%d)", pps.i_id, pps.i_sps_id );
880 881 882
        block_Release( p_frag );
        return;
    }
883
    p_sys->i_pic_order_present_flag = pps.i_pic_order_present_flag;
884

885
    /* We have a new PPS */
886
    if( !p_sys->b_pps )
887
        msg_Dbg( p_dec, "found NAL_PPS (pps_id=%d sps_id=%d)", pps.i_id, pps.i_sps_id );
888
    p_sys->b_pps = true;
889

890 891 892
    if( p_sys->pp_pps[pps.i_id] )
        block_Release( p_sys->pp_pps[pps.i_id] );
    p_sys->pp_pps[pps.i_id] = p_frag;
893 894 895 896 897 898 899 900
}

static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
                        int i_nal_ref_idc, int i_nal_type, const block_t *p_frag )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    uint8_t *pb_dec;
    int i_dec;
Rafaël Carré's avatar
Rafaël Carré committed
901
    int i_slice_type;
902 903
    slice_t slice;
    bs_t s;
Laurent Aimar's avatar
Laurent Aimar committed
904

905
    /* do not convert the whole frame */
906
    CreateRbspFromNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
907 908
                     __MIN( p_frag->i_buffer - 5, 60 ) );
    bs_init( &s, pb_dec, i_dec );
909

910
    /* first_mb_in_slice */
Rafaël Carré's avatar
Rafaël Carré committed
911
    /* int i_first_mb = */ bs_read_ue( &s );
912

913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933
    /* slice_type */
    switch( (i_slice_type = bs_read_ue( &s )) )
    {
    case 0: case 5:
        slice.i_frame_type = BLOCK_FLAG_TYPE_P;
        break;
    case 1: case 6:
        slice.i_frame_type = BLOCK_FLAG_TYPE_B;
        break;
    case 2: case 7:
        slice.i_frame_type = BLOCK_FLAG_TYPE_I;
        break;
    case 3: case 8: /* SP */
        slice.i_frame_type = BLOCK_FLAG_TYPE_P;
        break;
    case 4: case 9:
        slice.i_frame_type = BLOCK_FLAG_TYPE_I;
        break;
    default:
        slice.i_frame_type = 0;
        break;
934
    }
935 936 937 938 939 940 941 942 943 944 945

    /* */
    slice.i_nal_type = i_nal_type;
    slice.i_nal_ref_idc = i_nal_ref_idc;

    slice.i_pic_parameter_set_id = bs_read_ue( &s );
    slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );

    slice.i_field_pic_flag = 0;
    slice.i_bottom_field_flag = -1;
    if( !p_sys->b_frame_mbs_only )
946
    {
947 948 949 950
        /* field_pic_flag */
        slice.i_field_pic_flag = bs_read( &s, 1 );
        if( slice.i_field_pic_flag )
            slice.i_bottom_field_flag = bs_read( &s, 1 );
951 952
    }

953 954 955
    slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
    if( slice.i_nal_type == NAL_SLICE_IDR )
        slice.i_idr_pic_id = bs_read_ue( &s );
956

957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981
    slice.i_pic_order_cnt_lsb = -1;
    slice.i_delta_pic_order_cnt_bottom = -1;
    slice.i_delta_pic_order_cnt0 = 0;
    slice.i_delta_pic_order_cnt1 = 0;
    if( p_sys->i_pic_order_cnt_type == 0 )
    {
        slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
        if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
            slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
    }
    else if( (p_sys->i_pic_order_cnt_type == 1) &&
             (!p_sys->i_delta_pic_order_always_zero_flag) )
    {
        slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
        if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
            slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
    }
    free( pb_dec );

    /* Detection of the first VCL NAL unit of a primary coded picture
     * (cf. 7.4.1.2.4) */
    bool b_pic = false;
    if( slice.i_frame_num != p_sys->slice.i_frame_num ||
        slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
        slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
982
        !slice.i_nal_ref_idc != !p_sys->slice.i_nal_ref_idc )
983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002
        b_pic = true;
    if( (slice.i_bottom_field_flag != -1) &&
        (p_sys->slice.i_bottom_field_flag != -1) &&
        (slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag) )
        b_pic = true;
    if( p_sys->i_pic_order_cnt_type == 0 &&
        ( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
          slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
        b_pic = true;
    else if( p_sys->i_pic_order_cnt_type == 1 &&
             ( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
               slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
        b_pic = true;
    if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
        ( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
            b_pic = true;

    /* */
    *pb_new_picture = b_pic;
    *p_slice = slice;
1003
}
1004

1005 1006 1007 1008 1009 1010 1011
static void ParseSei( decoder_t *p_dec, block_t *p_frag )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    uint8_t *pb_dec;
    int i_dec;

    /* */
1012
    CreateRbspFromNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040
    if( !pb_dec )
        return;

    /* The +1 is for rbsp trailing bits */
    for( int i_used = 0; i_used+1 < i_dec; )
    {
        /* Read type */
        int i_type = 0;
        while( i_used+1 < i_dec )
        {
            const int i_byte = pb_dec[i_used++];
            i_type += i_byte;
            if( i_byte != 0xff )
                break;
        }
        /* Read size */
        int i_size = 0;
        while( i_used+1 < i_dec )
        {
            const int i_byte = pb_dec[i_used++];
            i_size += i_byte;
            if( i_byte != 0xff )
                break;
        }
        /* Check room */
        if( i_used + i_size + 1 > i_dec )
            break;

1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060
        /* Look for pic timing */
        if( i_type == SEI_PIC_TIMING )
        {
            bs_t s;
            const int      i_tim = i_size;
            const uint8_t *p_tim = &pb_dec[i_used];

            bs_init( &s, p_tim, i_tim );

            if( p_sys->b_cpb_dpb_delays_present_flag )
            {
                bs_read( &s, p_sys->i_cpb_removal_delay_length_minus1 + 1 );
                bs_read( &s, p_sys->i_dpb_output_delay_length_minus1 + 1 );
            }

            if( p_sys->b_pic_struct_present_flag )
                p_sys->i_pic_struct = bs_read( &s, 4 );
            /* + unparsed remains */
        }

1061
        /* Look for user_data_registered_itu_t_t35 */
1062
        if( i_type == SEI_USER_DATA_REGISTERED_ITU_T_T35 )
1063
        {
1064 1065 1066 1067 1068
            /* TS 101 154 Auxiliary Data and H264/AVC video */
            static const uint8_t p_DVB1_data_start_code[] = {
                0xb5, /* United States */
                0x00, 0x31, /* US provider code */
                0x47, 0x41, 0x39, 0x34 /* user identifier */
1069
            };
1070 1071 1072 1073 1074 1075 1076

            static const uint8_t p_DIRECTV_data_start_code[] = {
                0xb5, /* United States */
                0x00, 0x2f, /* US provider code */
                0x03  /* Captions */
            };

1077
            const unsigned i_t35 = i_size;
1078 1079 1080
            const uint8_t *p_t35 = &pb_dec[i_used];

            /* Check for we have DVB1_data() */
1081 1082
            if( i_t35 >= sizeof(p_DVB1_data_start_code) &&
                !memcmp( p_t35, p_DVB1_data_start_code, sizeof(p_DVB1_data_start_code) ) )
1083
            {
1084
                cc_Extract( &p_sys->cc_next, true, &p_t35[3], i_t35 - 3 );
1085 1086 1087 1088
            } else if( i_t35 >= sizeof(p_DIRECTV_data_start_code) &&
                !memcmp( p_t35, p_DIRECTV_data_start_code, sizeof(p_DIRECTV_data_start_code) ) )
            {
                cc_Extract( &p_sys->cc_next, true, &p_t35[3], i_t35 - 3 );
1089 1090
            }
        }
1091 1092

        /* Look for SEI recovery point */
1093
        if( i_type == SEI_RECOVERY_POINT )
1094 1095 1096 1097
        {
            bs_t s;
            const int      i_rec = i_size;
            const uint8_t *p_rec = &pb_dec[i_used];
1098

1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111
            bs_init( &s, p_rec, i_rec );
            int i_recovery_frames = bs_read_ue( &s );
            //bool b_exact_match = bs_read( &s, 1 );
            //bool b_broken_link = bs_read( &s, 1 );
            //int i_changing_slice_group = bs_read( &s, 2 );
            if( !p_sys->b_header )
            {
                msg_Dbg( p_dec, "Seen SEI recovery point, %d recovery frames", i_recovery_frames );
                if ( p_sys->i_recovery_frames == -1 || i_recovery_frames < p_sys->i_recovery_frames )
                    p_sys->i_recovery_frames = i_recovery_frames;
            }
        }

1112 1113 1114 1115 1116
        i_used += i_size;
    }

    free( pb_dec );
}
1117