git.sesse.net Git - vlc/blob - modules/demux/avformat/demux.c

   1 /*****************************************************************************
   2  * demux.c: demuxer using libavformat
   3  *****************************************************************************
   4  * Copyright (C) 2004-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_demux.h>
  35 #include <vlc_stream.h>
  36 #include <vlc_meta.h>
  37 #include <vlc_input.h>
  38 #include <vlc_charset.h>
  39 #include <vlc_avcodec.h>
  40
  41 #include <libavformat/avformat.h>
  42
  43 #include "../../codec/avcodec/avcodec.h"
  44 #include "../../codec/avcodec/chroma.h"
  45 #include "../../codec/avcodec/avcommon.h"
  46 #include "avformat.h"
  47 #include "../xiph.h"
  48 #include "../vobsub.h"
  49
  50 /* Support for deprecated APIs */
  51
  52 #if LIBAVFORMAT_VERSION_MAJOR < 54
  53 # define AVDictionaryEntry AVMetadataTag
  54 # define av_dict_get av_metadata_get
  55 #endif
  56
  57 //#define AVFORMAT_DEBUG 1
  58
  59 /* Version checking */
  60 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
  61
  62 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(50<<8)+0) )
  63 #   define HAVE_AVUTIL_CODEC_ATTACHMENT 1
  64 #endif
  65
  66 /*****************************************************************************
  67  * demux_sys_t: demux descriptor
  68  *****************************************************************************/
  69 struct demux_sys_t
  70 {
  71 #if LIBAVFORMAT_VERSION_INT < ((53<<16)+(2<<8)+0)
  72     ByteIOContext   io;
  73 #endif
  74
  75     int             io_buffer_size;
  76     uint8_t        *io_buffer;
  77
  78     AVInputFormat  *fmt;
  79     AVFormatContext *ic;
  80
  81     int             i_tk;
  82     es_out_id_t     **tk;
  83     int64_t         *tk_pcr;
  84     int64_t         i_pcr;
  85
  86     unsigned    i_ssa_order;
  87
  88     int                i_attachments;
  89     input_attachment_t **attachments;
  90
  91     /* Only one title with seekpoints possible atm. */
  92     input_title_t *p_title;
  93 };
  94
  95 /*****************************************************************************
  96  * Local prototypes
  97  *****************************************************************************/
  98 static int Demux  ( demux_t *p_demux );
  99 static int Control( demux_t *p_demux, int i_query, va_list args );
 100
 101 static int IORead( void *opaque, uint8_t *buf, int buf_size );
 102 static int64_t IOSeek( void *opaque, int64_t offset, int whence );
 103
 104 static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order );
 105 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time );
 106 static void ResetTime( demux_t *p_demux, int64_t i_time );
 107
 108 /*****************************************************************************
 109  * Open
 110  *****************************************************************************/
 111 int OpenDemux( vlc_object_t *p_this )
 112 {
 113     demux_t       *p_demux = (demux_t*)p_this;
 114     demux_sys_t   *p_sys;
 115     AVProbeData   pd;
 116     AVInputFormat *fmt = NULL;
 117     unsigned int  i;
 118     int64_t       i_start_time = -1;
 119     bool          b_can_seek;
 120     char         *psz_url;
 121     int           error;
 122
 123     if( p_demux->psz_file )
 124         psz_url = strdup( p_demux->psz_file );
 125     else
 126     {
 127         if( asprintf( &psz_url, "%s://%s", p_demux->psz_access, p_demux->psz_location ) == -1)
 128             return VLC_ENOMEM;
 129     }
 130     msg_Dbg( p_demux, "trying url: %s", psz_url );
 131     /* Init Probe data */
 132     pd.filename = psz_url;
 133     if( ( pd.buf_size = stream_Peek( p_demux->s, (const uint8_t**)&pd.buf, 2048 + 213 ) ) <= 0 )
 134     {
 135         free( psz_url );
 136         msg_Warn( p_demux, "cannot peek" );
 137         return VLC_EGENERIC;
 138     }
 139     stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_can_seek );
 140
 141     vlc_init_avformat();
 142
 143     char *psz_format = var_InheritString( p_this, "avformat-format" );
 144     if( psz_format )
 145     {
 146         if( (fmt = av_find_input_format(psz_format)) )
 147             msg_Dbg( p_demux, "forcing format: %s", fmt->name );
 148         free( psz_format );
 149     }
 150
 151     /* Guess format */
 152     if( !fmt && !( fmt = av_probe_input_format( &pd, 1 ) ) )
 153     {
 154         msg_Dbg( p_demux, "couldn't guess format" );
 155         free( psz_url );
 156         return VLC_EGENERIC;
 157     }
 158
 159     if( !p_demux->b_force )
 160     {
 161         static const char ppsz_blacklist[][16] = {
 162             /* Don't handle MPEG unless forced */
 163             "mpeg", "vcd", "vob", "mpegts",
 164             /* libavformat's redirector won't work */
 165             "redir", "sdp",
 166             /* Don't handle subtitles format */
 167             "ass", "srt", "microdvd",
 168             ""
 169         };
 170
 171         for( int i = 0; *ppsz_blacklist[i]; i++ )
 172         {
 173             if( !strcmp( fmt->name, ppsz_blacklist[i] ) )
 174             {
 175                 free( psz_url );
 176                 return VLC_EGENERIC;
 177             }
 178         }
 179     }
 180
 181     /* Don't trigger false alarms on bin files */
 182     if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
 183     {
 184         int i_len;
 185
 186         if( !p_demux->psz_file )
 187         {
 188             free( psz_url );
 189             return VLC_EGENERIC;
 190         }
 191
 192         i_len = strlen( p_demux->psz_file );
 193         if( i_len < 4 )
 194         {
 195             free( psz_url );
 196             return VLC_EGENERIC;
 197         }
 198
 199         if( strcasecmp( &p_demux->psz_file[i_len - 4], ".str" ) &&
 200             strcasecmp( &p_demux->psz_file[i_len - 4], ".xai" ) &&
 201             strcasecmp( &p_demux->psz_file[i_len - 3], ".xa" ) )
 202         {
 203             free( psz_url );
 204             return VLC_EGENERIC;
 205         }
 206     }
 207
 208     msg_Dbg( p_demux, "detected format: %s", fmt->name );
 209
 210     /* Fill p_demux fields */
 211     p_demux->pf_demux = Demux;
 212     p_demux->pf_control = Control;
 213     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 214     p_sys->ic = 0;
 215     p_sys->fmt = fmt;
 216     p_sys->i_tk = 0;
 217     p_sys->tk = NULL;
 218     p_sys->tk_pcr = NULL;
 219     p_sys->i_ssa_order = 0;
 220     TAB_INIT( p_sys->i_attachments, p_sys->attachments);
 221     p_sys->p_title = NULL;
 222
 223     /* Create I/O wrapper */
 224     p_sys->io_buffer_size = 32768;  /* FIXME */
 225     p_sys->io_buffer = malloc( p_sys->io_buffer_size );
 226
 227 #if LIBAVFORMAT_VERSION_INT >= ((53<<16)+(2<<8)+0)
 228     p_sys->ic = avformat_alloc_context();
 229     p_sys->ic->pb = avio_alloc_context( p_sys->io_buffer,
 230         p_sys->io_buffer_size, 0, p_demux, IORead, NULL, IOSeek );
 231     p_sys->ic->pb->seekable = b_can_seek ? AVIO_SEEKABLE_NORMAL : 0;
 232     error = avformat_open_input(&p_sys->ic, psz_url, p_sys->fmt, NULL);
 233 #else
 234     init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size, 0,
 235         p_demux, IORead, NULL, IOSeek );
 236     p_sys->io.is_streamed = !b_can_seek;
 237 # if defined(AVIO_SEEKABLE_NORMAL)
 238     p_sys->io.seekable = !!b_can_seek;
 239 # endif
 240     error = av_open_input_stream(&p_sys->ic, &p_sys->io, psz_url, p_sys->fmt, NULL);
 241 #endif
 242
 243     free( psz_url );
 244     if( error < 0 )
 245     {
 246         errno = AVUNERROR(error);
 247         msg_Err( p_demux, "Could not open %s: %m", psz_url );
 248         p_sys->ic = NULL;
 249         CloseDemux( p_this );
 250         return VLC_EGENERIC;
 251     }
 252
 253 #if LIBAVFORMAT_VERSION_INT >= ((53<<16)+(26<<8)+0)
 254     char *psz_opts = var_InheritString( p_demux, "avformat-options" );
 255     AVDictionary *options[p_sys->ic->nb_streams ? p_sys->ic->nb_streams : 1];
 256     options[0] = NULL;
 257     for (unsigned i = 1; i < p_sys->ic->nb_streams; i++)
 258         options[i] = NULL;
 259     if (psz_opts && *psz_opts) {
 260         options[0] = vlc_av_get_options(psz_opts);
 261         for (unsigned i = 1; i < p_sys->ic->nb_streams; i++) {
 262             av_dict_copy(&options[i], options[0], 0);
 263         }
 264     }
 265     free(psz_opts);
 266     vlc_avcodec_lock(); /* avformat calls avcodec behind our back!!! */
 267     error = avformat_find_stream_info( p_sys->ic, options );
 268     vlc_avcodec_unlock();
 269     AVDictionaryEntry *t = NULL;
 270     while ((t = av_dict_get(options[0], "", t, AV_DICT_IGNORE_SUFFIX))) {
 271         msg_Err( p_demux, "Unknown option \"%s\"", t->key );
 272     }
 273     av_dict_free(&options[0]);
 274     for (unsigned i = 1; i < p_sys->ic->nb_streams; i++) {
 275         av_dict_free(&options[i]);
 276     }
 277 #else
 278     vlc_avcodec_lock(); /* avformat calls avcodec behind our back!!! */
 279     error = av_find_stream_info( p_sys->ic );
 280     vlc_avcodec_unlock();
 281 #endif
 282
 283     if( error < 0 )
 284     {
 285         errno = AVUNERROR(error);
 286         msg_Warn( p_demux, "Could not find stream info: %m" );
 287     }
 288
 289     for( i = 0; i < p_sys->ic->nb_streams; i++ )
 290     {
 291         AVStream *s = p_sys->ic->streams[i];
 292         AVCodecContext *cc = s->codec;
 293
 294         es_out_id_t  *es;
 295         es_format_t  fmt;
 296         vlc_fourcc_t fcc;
 297         const char *psz_type = "unknown";
 298
 299         if( !GetVlcFourcc( cc->codec_id, NULL, &fcc, NULL ) )
 300             fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
 301
 302         switch( cc->codec_type )
 303         {
 304         case AVMEDIA_TYPE_AUDIO:
 305             es_format_Init( &fmt, AUDIO_ES, fcc );
 306             fmt.i_bitrate = cc->bit_rate;
 307             fmt.audio.i_channels = cc->channels;
 308             fmt.audio.i_rate = cc->sample_rate;
 309             fmt.audio.i_bitspersample = cc->bits_per_coded_sample;
 310             fmt.audio.i_blockalign = cc->block_align;
 311             psz_type = "audio";
 312             break;
 313
 314         case AVMEDIA_TYPE_VIDEO:
 315             es_format_Init( &fmt, VIDEO_ES, fcc );
 316
 317             /* Special case for raw video data */
 318             if( cc->codec_id == CODEC_ID_RAWVIDEO )
 319             {
 320                 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
 321                 if( GetVlcChroma( &fmt.video, cc->pix_fmt ) != VLC_SUCCESS)
 322                 {
 323                     msg_Err( p_demux, "was unable to find a FourCC match for raw video" );
 324                 }
 325                 else
 326                     fmt.i_codec = fmt.video.i_chroma;
 327             }
 328             /* We need this for the h264 packetizer */
 329             else if( cc->codec_id == CODEC_ID_H264 && ( p_sys->fmt == av_find_input_format("flv") ||
 330                 p_sys->fmt == av_find_input_format("matroska") || p_sys->fmt == av_find_input_format("mp4") ) )
 331                 fmt.i_original_fourcc = VLC_FOURCC( 'a', 'v', 'c', '1' );
 332
 333             fmt.video.i_width = cc->width;
 334             fmt.video.i_height = cc->height;
 335 #if LIBAVCODEC_VERSION_MAJOR < 54
 336             if( cc->palctrl )
 337             {
 338                 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
 339                 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
 340             }
 341 #else
 342 # warning FIXME: implement palette transmission
 343 #endif
 344             psz_type = "video";
 345             fmt.video.i_frame_rate = cc->time_base.den;
 346             fmt.video.i_frame_rate_base = cc->time_base.num * __MAX( cc->ticks_per_frame, 1 );
 347             break;
 348
 349         case AVMEDIA_TYPE_SUBTITLE:
 350             es_format_Init( &fmt, SPU_ES, fcc );
 351             if( strncmp( p_sys->ic->iformat->name, "matroska", 8 ) == 0 &&
 352                 cc->codec_id == CODEC_ID_DVD_SUBTITLE &&
 353                 cc->extradata != NULL &&
 354                 cc->extradata_size > 0 )
 355             {
 356                 char *psz_start;
 357                 char *psz_buf = malloc( cc->extradata_size + 1);
 358                 if( psz_buf != NULL )
 359                 {
 360                     memcpy( psz_buf, cc->extradata , cc->extradata_size );
 361                     psz_buf[cc->extradata_size] = '\0';
 362
 363                     psz_start = strstr( psz_buf, "size:" );
 364                     if( psz_start &&
 365                         vobsub_size_parse( psz_start,
 366                                            &fmt.subs.spu.i_original_frame_width,
 367                                            &fmt.subs.spu.i_original_frame_height ) == VLC_SUCCESS )
 368                     {
 369                         msg_Dbg( p_demux, "original frame size: %dx%d",
 370                                  fmt.subs.spu.i_original_frame_width,
 371                                  fmt.subs.spu.i_original_frame_height );
 372                     }
 373                     else
 374                     {
 375                         msg_Warn( p_demux, "reading original frame size failed" );
 376                     }
 377
 378                     psz_start = strstr( psz_buf, "palette:" );
 379                     if( psz_start &&
 380                         vobsub_palette_parse( psz_start, &fmt.subs.spu.palette[1] ) == VLC_SUCCESS )
 381                     {
 382                         fmt.subs.spu.palette[0] =  0xBeef;
 383                         msg_Dbg( p_demux, "vobsub palette read" );
 384                     }
 385                     else
 386                     {
 387                         msg_Warn( p_demux, "reading original palette failed" );
 388                     }
 389                     free( psz_buf );
 390                 }
 391             }
 392
 393             psz_type = "subtitle";
 394             break;
 395
 396         default:
 397             es_format_Init( &fmt, UNKNOWN_ES, 0 );
 398 #ifdef HAVE_AVUTIL_CODEC_ATTACHMENT
 399             if( cc->codec_type == AVMEDIA_TYPE_ATTACHMENT )
 400             {
 401                 input_attachment_t *p_attachment;
 402
 403                 psz_type = "attachment";
 404                 if( cc->codec_id == CODEC_ID_TTF )
 405                 {
 406                     AVDictionaryEntry *filename = av_dict_get( s->metadata, "filename", NULL, 0 );
 407                     if( filename && filename->value )
 408                     {
 409                         p_attachment = vlc_input_attachment_New(
 410                                 filename->value, "application/x-truetype-font",
 411                                 NULL, cc->extradata, (int)cc->extradata_size );
 412                         TAB_APPEND( p_sys->i_attachments, p_sys->attachments,
 413                                 p_attachment );
 414                     }
 415                 }
 416                 else msg_Warn( p_demux, "unsupported attachment type (%u) in avformat demux", cc->codec_id );
 417             }
 418             else
 419 #endif
 420             {
 421                 if( cc->codec_type == AVMEDIA_TYPE_DATA )
 422                     psz_type = "data";
 423
 424                 msg_Warn( p_demux, "unsupported track type (%u:%u) in avformat demux", cc->codec_type, cc->codec_id );
 425             }
 426             break;
 427         }
 428
 429         AVDictionaryEntry *language = av_dict_get( s->metadata, "language", NULL, 0 );
 430         if ( language && language->value )
 431             fmt.psz_language = strdup( language->value );
 432
 433         if( s->disposition & AV_DISPOSITION_DEFAULT )
 434             fmt.i_priority = 1000;
 435
 436 #ifdef HAVE_AVUTIL_CODEC_ATTACHMENT
 437         if( cc->codec_type != AVMEDIA_TYPE_ATTACHMENT )
 438 #endif
 439         if( cc->codec_type != AVMEDIA_TYPE_DATA )
 440         {
 441             const bool    b_ogg = !strcmp( p_sys->fmt->name, "ogg" );
 442             const uint8_t *p_extra = cc->extradata;
 443             unsigned      i_extra  = cc->extradata_size;
 444
 445             if( cc->codec_id == CODEC_ID_THEORA && b_ogg )
 446             {
 447                 unsigned pi_size[3];
 448                 const void *pp_data[3];
 449                 unsigned i_count;
 450                 for( i_count = 0; i_count < 3; i_count++ )
 451                 {
 452                     if( i_extra < 2 )
 453                         break;
 454                     pi_size[i_count] = GetWBE( p_extra );
 455                     pp_data[i_count] = &p_extra[2];
 456                     if( i_extra < pi_size[i_count] + 2 )
 457                         break;
 458
 459                     p_extra += 2 + pi_size[i_count];
 460                     i_extra -= 2 + pi_size[i_count];
 461                 }
 462                 if( i_count > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra,
 463                                                      pi_size, pp_data, i_count ) )
 464                 {
 465                     fmt.i_extra = 0;
 466                     fmt.p_extra = NULL;
 467                 }
 468             }
 469             else if( cc->codec_id == CODEC_ID_SPEEX && b_ogg )
 470             {
 471                 const uint8_t p_dummy_comment[] = {
 472                     0, 0, 0, 0,
 473                     0, 0, 0, 0,
 474                 };
 475                 unsigned pi_size[2];
 476                 const void *pp_data[2];
 477
 478                 pi_size[0] = i_extra;
 479                 pp_data[0] = p_extra;
 480
 481                 pi_size[1] = sizeof(p_dummy_comment);
 482                 pp_data[1] = p_dummy_comment;
 483
 484                 if( pi_size[0] > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra,
 485                                                         pi_size, pp_data, 2 ) )
 486                 {
 487                     fmt.i_extra = 0;
 488                     fmt.p_extra = NULL;
 489                 }
 490             }
 491             else if( cc->extradata_size > 0 )
 492             {
 493                 fmt.p_extra = malloc( i_extra );
 494                 if( fmt.p_extra )
 495                 {
 496                     fmt.i_extra = i_extra;
 497                     memcpy( fmt.p_extra, p_extra, i_extra );
 498                 }
 499             }
 500             es = es_out_Add( p_demux->out, &fmt );
 501             if( s->disposition & AV_DISPOSITION_DEFAULT )
 502                 es_out_Control( p_demux->out, ES_OUT_SET_ES_DEFAULT, es );
 503             es_format_Clean( &fmt );
 504
 505             msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
 506                      psz_type, (char*)&fcc );
 507             TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
 508         }
 509     }
 510     p_sys->tk_pcr = calloc( p_sys->i_tk, sizeof(*p_sys->tk_pcr) );
 511
 512     if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 513         i_start_time = p_sys->ic->start_time * 1000000 / AV_TIME_BASE;
 514
 515     msg_Dbg( p_demux, "AVFormat supported stream" );
 516     msg_Dbg( p_demux, "    - format = %s (%s)",
 517              p_sys->fmt->name, p_sys->fmt->long_name );
 518     msg_Dbg( p_demux, "    - start time = %"PRId64, i_start_time );
 519     msg_Dbg( p_demux, "    - duration = %"PRId64,
 520              ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
 521              p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
 522
 523     if( p_sys->ic->nb_chapters > 0 )
 524     {
 525         p_sys->p_title = vlc_input_title_New();
 526         p_sys->p_title->i_length = p_sys->ic->duration * 1000000 / AV_TIME_BASE;
 527     }
 528
 529     for( i = 0; i < p_sys->ic->nb_chapters; i++ )
 530     {
 531         seekpoint_t *s = vlc_seekpoint_New();
 532
 533         AVDictionaryEntry *title = av_dict_get( p_sys->ic->metadata, "title", NULL, 0);
 534         if( title && title->value )
 535         {
 536             s->psz_name = strdup( title->value );
 537             EnsureUTF8( s->psz_name );
 538             msg_Dbg( p_demux, "    - chapter %d: %s", i, s->psz_name );
 539         }
 540         s->i_time_offset = p_sys->ic->chapters[i]->start * 1000000 *
 541             p_sys->ic->chapters[i]->time_base.num /
 542             p_sys->ic->chapters[i]->time_base.den -
 543             (i_start_time != -1 ? i_start_time : 0 );
 544         TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
 545     }
 546
 547     ResetTime( p_demux, 0 );
 548     return VLC_SUCCESS;
 549 }
 550
 551 /*****************************************************************************
 552  * Close
 553  *****************************************************************************/
 554 void CloseDemux( vlc_object_t *p_this )
 555 {
 556     demux_t     *p_demux = (demux_t*)p_this;
 557     demux_sys_t *p_sys = p_demux->p_sys;
 558
 559     FREENULL( p_sys->tk );
 560     free( p_sys->tk_pcr );
 561
 562     if( p_sys->ic )
 563     {
 564 #if LIBAVFORMAT_VERSION_INT >= ((53<<16)+(2<<8)+0)
 565         av_free( p_sys->ic->pb );
 566 #endif
 567 #if LIBAVFORMAT_VERSION_INT >= ((53<<16)+(26<<8)+0)
 568         avformat_close_input( &p_sys->ic );
 569 #else
 570         av_close_input_stream( p_sys->ic );
 571 #endif
 572     }
 573
 574     for( int i = 0; i < p_sys->i_attachments; i++ )
 575         free( p_sys->attachments[i] );
 576     TAB_CLEAN( p_sys->i_attachments, p_sys->attachments);
 577
 578     if( p_sys->p_title )
 579         vlc_input_title_Delete( p_sys->p_title );
 580
 581     free( p_sys->io_buffer );
 582     free( p_sys );
 583 }
 584
 585 /*****************************************************************************
 586  * Demux:
 587  *****************************************************************************/
 588 static int Demux( demux_t *p_demux )
 589 {
 590     demux_sys_t *p_sys = p_demux->p_sys;
 591     AVPacket    pkt;
 592     block_t     *p_frame;
 593     int64_t     i_start_time;
 594
 595     /* Read a frame */
 596     int i_av_ret = av_read_frame( p_sys->ic, &pkt );
 597     if( i_av_ret )
 598     {
 599         /* Avoid EOF if av_read_frame returns AVERROR(EAGAIN) */
 600         if( i_av_ret == AVERROR(EAGAIN) )
 601             return 1;
 602
 603         return 0;
 604     }
 605     if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
 606     {
 607         av_free_packet( &pkt );
 608         return 1;
 609     }
 610     const AVStream *p_stream = p_sys->ic->streams[pkt.stream_index];
 611     if( p_stream->time_base.den <= 0 )
 612     {
 613         msg_Warn( p_demux, "Invalid time base for the stream %d", pkt.stream_index );
 614         av_free_packet( &pkt );
 615         return 1;
 616     }
 617     if( p_stream->codec->codec_id == CODEC_ID_SSA )
 618     {
 619         p_frame = BuildSsaFrame( &pkt, p_sys->i_ssa_order++ );
 620         if( !p_frame )
 621         {
 622             av_free_packet( &pkt );
 623             return 1;
 624         }
 625     }
 626     else
 627     {
 628         if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
 629         {
 630             av_free_packet( &pkt );
 631             return 0;
 632         }
 633         memcpy( p_frame->p_buffer, pkt.data, pkt.size );
 634     }
 635
 636     if( pkt.flags & AV_PKT_FLAG_KEY )
 637         p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
 638
 639     /* Used to avoid timestamps overlow */
 640     lldiv_t q;
 641     if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 642     {
 643         q = lldiv( p_sys->ic->start_time, AV_TIME_BASE);
 644         i_start_time = q.quot * (int64_t)1000000 + q.rem * (int64_t)1000000 / AV_TIME_BASE;
 645     }
 646     else
 647         i_start_time = 0;
 648
 649     if( pkt.dts == (int64_t)AV_NOPTS_VALUE )
 650         p_frame->i_dts = VLC_TS_INVALID;
 651     else
 652     {
 653         q = lldiv( pkt.dts, p_stream->time_base.den );
 654         p_frame->i_dts = q.quot * (int64_t)1000000 *
 655             p_stream->time_base.num + q.rem * (int64_t)1000000 *
 656             p_stream->time_base.num /
 657             p_stream->time_base.den - i_start_time + VLC_TS_0;
 658     }
 659
 660     if( pkt.pts == (int64_t)AV_NOPTS_VALUE )
 661         p_frame->i_pts = VLC_TS_INVALID;
 662     else
 663     {
 664         q = lldiv( pkt.pts, p_stream->time_base.den );
 665         p_frame->i_pts = q.quot * (int64_t)1000000 *
 666             p_stream->time_base.num + q.rem * (int64_t)1000000 *
 667             p_stream->time_base.num /
 668             p_stream->time_base.den - i_start_time + VLC_TS_0;
 669     }
 670     if( pkt.duration > 0 && p_frame->i_length <= 0 )
 671         p_frame->i_length = pkt.duration * 1000000 *
 672             p_stream->time_base.num /
 673             p_stream->time_base.den;
 674
 675     if( pkt.dts != (int64_t)AV_NOPTS_VALUE && pkt.dts == pkt.pts &&
 676         p_stream->codec->codec_type == AVMEDIA_TYPE_VIDEO )
 677     {
 678         /* Add here notoriously bugged file formats/samples regarding PTS */
 679         if( !strcmp( p_sys->fmt->name, "flv" ) )
 680             p_frame->i_pts = VLC_TS_INVALID;
 681     }
 682 #ifdef AVFORMAT_DEBUG
 683     msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
 684              pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
 685 #endif
 686     if( p_frame->i_dts > VLC_TS_INVALID )
 687         p_sys->tk_pcr[pkt.stream_index] = p_frame->i_dts;
 688
 689     int64_t i_ts_max = INT64_MIN;
 690     for( int i = 0; i < p_sys->i_tk; i++ )
 691         i_ts_max = __MAX( i_ts_max, p_sys->tk_pcr[i] );
 692
 693     int64_t i_ts_min = INT64_MAX;
 694     for( int i = 0; i < p_sys->i_tk; i++ )
 695     {
 696         if( p_sys->tk_pcr[i] > VLC_TS_INVALID && p_sys->tk_pcr[i] + 10 * CLOCK_FREQ >= i_ts_max )
 697             i_ts_min = __MIN( i_ts_min, p_sys->tk_pcr[i] );
 698     }
 699     if( i_ts_min >= p_sys->i_pcr )
 700     {
 701         p_sys->i_pcr = i_ts_min;
 702         es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
 703         UpdateSeekPoint( p_demux, p_sys->i_pcr );
 704     }
 705
 706     es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
 707
 708     av_free_packet( &pkt );
 709     return 1;
 710 }
 711
 712 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time )
 713 {
 714     demux_sys_t *p_sys = p_demux->p_sys;
 715     int i;
 716
 717     if( !p_sys->p_title )
 718         return;
 719
 720     for( i = 0; i < p_sys->p_title->i_seekpoint; i++ )
 721     {
 722         if( i_time < p_sys->p_title->seekpoint[i]->i_time_offset )
 723             break;
 724     }
 725     i--;
 726
 727     if( i != p_demux->info.i_seekpoint && i >= 0 )
 728     {
 729         p_demux->info.i_seekpoint = i;
 730         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 731     }
 732 }
 733
 734 static void ResetTime( demux_t *p_demux, int64_t i_time )
 735 {
 736     demux_sys_t *p_sys = p_demux->p_sys;
 737
 738     if( p_sys->ic->start_time == (int64_t)AV_NOPTS_VALUE || i_time < 0 )
 739         i_time = VLC_TS_INVALID;
 740     else if( i_time == 0 )
 741         i_time = 1;
 742
 743     p_sys->i_pcr = i_time;
 744     for( int i = 0; i < p_sys->i_tk; i++ )
 745         p_sys->tk_pcr[i] = i_time;
 746
 747     if( i_time > VLC_TS_INVALID )
 748     {
 749         es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, i_time );
 750         UpdateSeekPoint( p_demux, i_time );
 751     }
 752 }
 753
 754 static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order )
 755 {
 756     if( p_pkt->size <= 0 )
 757         return NULL;
 758
 759     char buffer[256];
 760     const size_t i_buffer_size = __MIN( (int)sizeof(buffer) - 1, p_pkt->size );
 761     memcpy( buffer, p_pkt->data, i_buffer_size );
 762     buffer[i_buffer_size] = '\0';
 763
 764     /* */
 765     int i_layer;
 766     int h0, m0, s0, c0;
 767     int h1, m1, s1, c1;
 768     int i_position = 0;
 769     if( sscanf( buffer, "Dialogue: %d,%d:%d:%d.%d,%d:%d:%d.%d,%n", &i_layer,
 770                 &h0, &m0, &s0, &c0, &h1, &m1, &s1, &c1, &i_position ) < 9 )
 771         return NULL;
 772     if( i_position <= 0 || (unsigned)i_position >= i_buffer_size )
 773         return NULL;
 774
 775     char *p;
 776     if( asprintf( &p, "%u,%d,%.*s", i_order, i_layer, p_pkt->size - i_position, p_pkt->data + i_position ) < 0 )
 777         return NULL;
 778
 779     block_t *p_frame = block_heap_Alloc( p, strlen(p) + 1 );
 780     if( p_frame )
 781         p_frame->i_length = CLOCK_FREQ * ((h1-h0) * 3600 +
 782                                           (m1-m0) * 60 +
 783                                           (s1-s0) * 1) +
 784                             CLOCK_FREQ * (c1-c0) / 100;
 785     return p_frame;
 786 }
 787
 788 /*****************************************************************************
 789  * Control:
 790  *****************************************************************************/
 791 static int Control( demux_t *p_demux, int i_query, va_list args )
 792 {
 793     demux_sys_t *p_sys = p_demux->p_sys;
 794     const int64_t i_start_time = p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ? p_sys->ic->start_time : 0;
 795     double f, *pf;
 796     int64_t i64, *pi64;
 797
 798     switch( i_query )
 799     {
 800         case DEMUX_GET_POSITION:
 801             pf = (double*) va_arg( args, double* ); *pf = 0.0;
 802             i64 = stream_Size( p_demux->s );
 803             if( i64 > 0 )
 804             {
 805                 double current = stream_Tell( p_demux->s );
 806                 *pf = current / (double)i64;
 807             }
 808
 809             if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
 810             {
 811                 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
 812             }
 813
 814             return VLC_SUCCESS;
 815
 816         case DEMUX_SET_POSITION:
 817             f = (double) va_arg( args, double );
 818             i64 = p_sys->ic->duration * f + i_start_time;
 819
 820             msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
 821
 822             /* If we have a duration, we prefer to seek by time
 823                but if we don't, or if the seek fails, try BYTE seeking */
 824             if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
 825                 (av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BACKWARD ) < 0) )
 826             {
 827                 int64_t i_size = stream_Size( p_demux->s );
 828                 i64 = (i_size * f);
 829
 830                 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
 831                 if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
 832                     return VLC_EGENERIC;
 833
 834                 ResetTime( p_demux, -1 );
 835             }
 836             else
 837             {
 838                 ResetTime( p_demux, i64 - i_start_time );
 839             }
 840             return VLC_SUCCESS;
 841
 842         case DEMUX_GET_LENGTH:
 843             pi64 = (int64_t*)va_arg( args, int64_t * );
 844             if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
 845                 *pi64 = p_sys->ic->duration * 1000000 / AV_TIME_BASE;
 846             else
 847                 *pi64 = 0;
 848             return VLC_SUCCESS;
 849
 850         case DEMUX_GET_TIME:
 851             pi64 = (int64_t*)va_arg( args, int64_t * );
 852             *pi64 = p_sys->i_pcr;
 853             return VLC_SUCCESS;
 854
 855         case DEMUX_SET_TIME:
 856         {
 857             i64 = (int64_t)va_arg( args, int64_t );
 858             i64 = i64 *AV_TIME_BASE / 1000000 + i_start_time;
 859
 860             msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
 861
 862             if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BACKWARD ) < 0 )
 863             {
 864                 return VLC_EGENERIC;
 865             }
 866             ResetTime( p_demux, i64 - i_start_time );
 867             return VLC_SUCCESS;
 868         }
 869
 870         case DEMUX_HAS_UNSUPPORTED_META:
 871         {
 872             bool *pb_bool = (bool*)va_arg( args, bool* );
 873             *pb_bool = true;
 874             return VLC_SUCCESS;
 875         }
 876
 877
 878         case DEMUX_GET_META:
 879         {
 880             vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
 881
 882             AVDictionaryEntry *title = av_dict_get( p_sys->ic->metadata, "language", NULL, 0 );
 883             AVDictionaryEntry *artist = av_dict_get( p_sys->ic->metadata, "artist", NULL, 0 );
 884             AVDictionaryEntry *copyright = av_dict_get( p_sys->ic->metadata, "copyright", NULL, 0 );
 885             AVDictionaryEntry *comment = av_dict_get( p_sys->ic->metadata, "comment", NULL, 0 );
 886             AVDictionaryEntry *genre = av_dict_get( p_sys->ic->metadata, "genre", NULL, 0 );
 887
 888             if( title && title->value )
 889                 vlc_meta_SetTitle( p_meta, title->value );
 890             if( artist && artist->value )
 891                 vlc_meta_SetArtist( p_meta, artist->value );
 892             if( copyright && copyright->value )
 893                 vlc_meta_SetCopyright( p_meta, copyright->value );
 894             if( comment && comment->value )
 895                 vlc_meta_SetDescription( p_meta, comment->value );
 896             if( genre && genre->value )
 897                 vlc_meta_SetGenre( p_meta, genre->value );
 898             return VLC_SUCCESS;
 899         }
 900
 901         case DEMUX_GET_ATTACHMENTS:
 902         {
 903             input_attachment_t ***ppp_attach =
 904                 (input_attachment_t***)va_arg( args, input_attachment_t*** );
 905             int *pi_int = (int*)va_arg( args, int * );
 906             int i;
 907
 908             if( p_sys->i_attachments <= 0 )
 909                 return VLC_EGENERIC;
 910
 911             *pi_int = p_sys->i_attachments;;
 912             *ppp_attach = malloc( sizeof(input_attachment_t**) * p_sys->i_attachments );
 913             for( i = 0; i < p_sys->i_attachments; i++ )
 914                 (*ppp_attach)[i] = vlc_input_attachment_Duplicate( p_sys->attachments[i] );
 915             return VLC_SUCCESS;
 916         }
 917
 918         case DEMUX_GET_TITLE_INFO:
 919         {
 920             input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 921             int *pi_int    = (int*)va_arg( args, int* );
 922             int *pi_title_offset = (int*)va_arg( args, int* );
 923             int *pi_seekpoint_offset = (int*)va_arg( args, int* );
 924
 925             if( !p_sys->p_title )
 926                 return VLC_EGENERIC;
 927
 928             *pi_int = 1;
 929             *ppp_title = malloc( sizeof( input_title_t**) );
 930             (*ppp_title)[0] = vlc_input_title_Duplicate( p_sys->p_title );
 931             *pi_title_offset = 0;
 932             *pi_seekpoint_offset = 0;
 933             return VLC_SUCCESS;
 934         }
 935         case DEMUX_SET_TITLE:
 936         {
 937             const int i_title = (int)va_arg( args, int );
 938             if( !p_sys->p_title || i_title != 0 )
 939                 return VLC_EGENERIC;
 940             return VLC_SUCCESS;
 941         }
 942         case DEMUX_SET_SEEKPOINT:
 943         {
 944             const int i_seekpoint = (int)va_arg( args, int );
 945             if( !p_sys->p_title )
 946                 return VLC_EGENERIC;
 947
 948             i64 = p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset *
 949                   AV_TIME_BASE / 1000000 + i_start_time;
 950
 951             msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
 952
 953             if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BACKWARD ) < 0 )
 954             {
 955                 return VLC_EGENERIC;
 956             }
 957             ResetTime( p_demux, i64 - i_start_time );
 958             return VLC_SUCCESS;
 959         }
 960
 961
 962         default:
 963             return VLC_EGENERIC;
 964     }
 965 }
 966
 967 /*****************************************************************************
 968  * I/O wrappers for libavformat
 969  *****************************************************************************/
 970 static int IORead( void *opaque, uint8_t *buf, int buf_size )
 971 {
 972     demux_t *p_demux = opaque;
 973     if( buf_size < 0 ) return -1;
 974     int i_ret = stream_Read( p_demux->s, buf, buf_size );
 975     return i_ret ? i_ret : -1;
 976 }
 977
 978 static int64_t IOSeek( void *opaque, int64_t offset, int whence )
 979 {
 980     demux_t *p_demux = opaque;
 981     int64_t i_absolute;
 982     int64_t i_size = stream_Size( p_demux->s );
 983
 984 #ifdef AVFORMAT_DEBUG
 985     msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
 986 #endif
 987
 988     switch( whence )
 989     {
 990 #ifdef AVSEEK_SIZE
 991         case AVSEEK_SIZE:
 992             return i_size;
 993 #endif
 994         case SEEK_SET:
 995             i_absolute = (int64_t)offset;
 996             break;
 997         case SEEK_CUR:
 998             i_absolute = stream_Tell( p_demux->s ) + (int64_t)offset;
 999             break;
1000         case SEEK_END:
1001             i_absolute = i_size + (int64_t)offset;
1002             break;
1003         default:
1004             return -1;
1005
1006     }
1007
1008     if( i_absolute < 0 )
1009     {
1010         msg_Dbg( p_demux, "Trying to seek before the beginning" );
1011         return -1;
1012     }
1013
1014     if( i_size > 0 && i_absolute >= i_size )
1015     {
1016         msg_Dbg( p_demux, "Trying to seek too far : EOF?" );
1017         return -1;
1018     }
1019
1020     if( stream_Seek( p_demux->s, i_absolute ) )
1021     {
1022         msg_Warn( p_demux, "we were not allowed to seek, or EOF " );
1023         return -1;
1024     }
1025
1026     return stream_Tell( p_demux->s );
1027 }
1028
1029 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */