libmpdemux/demux_nuv.c

   1 /*
   2  * NuppelVideo 0.05 file parser
   3  * for MPlayer
   4  * by Panagiotis Issaris <takis@lumumba.luc.ac.be>
   5  *
   6  * Reworked by alex
   7  */
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12
  13 #include "config.h"
  14 #include "mp_msg.h"
  15 #include "help_mp.h"
  16 #include "stream/stream.h"
  17 #include "demuxer.h"
  18 #include "stheader.h"
  19 #include "nuppelvideo.h"
  20
  21
  22 struct nuv_signature
  23 {
  24         char finfo[12];     /* "NuppelVideo" + \0 */
  25         char version[5];    /* "0.05" + \0 */
  26 };
  27
  28 typedef struct nuv_position_t nuv_position_t;
  29
  30 struct nuv_position_t
  31 {
  32         off_t offset;
  33         float time;
  34         int frame;
  35         nuv_position_t* next;
  36 };
  37
  38 typedef struct nuv_info_t
  39 {
  40         int current_audio_frame;
  41         int current_video_frame;
  42         nuv_position_t *index_list;
  43         nuv_position_t *current_position;
  44 } nuv_priv_t;
  45
  46 /**
  47  * \brief find best matching bitrate (in kbps) out of a table
  48  * \param bitrate bitrate to find best match for
  49  * \return best match from table
  50  */
  51 static int nearestBitrate(int bitrate) {
  52   const int rates[17] = {8000, 16000, 24000, 32000, 40000, 48000, 56000,
  53                          64000, 80000, 96000, 112000, 128000, 160000,
  54                          192000, 224000, 256000, 320000};
  55   int i;
  56   for (i = 0; i < 16; i++) {
  57     if ((rates[i] + rates[i + 1]) / 2 > bitrate)
  58       break;
  59   }
  60   return rates[i];
  61 }
  62
  63 /**
  64  * Seek to a position relative to the current position, indicated in time.
  65  */
  66 static void demux_seek_nuv ( demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags )
  67 {
  68 #define MAX_TIME 1000000
  69         nuv_priv_t* priv = demuxer->priv;
  70         struct rtframeheader rtjpeg_frameheader;
  71         off_t orig_pos;
  72         off_t curr_pos;
  73         float current_time = 0;
  74         float start_time = MAX_TIME;
  75         float target_time = start_time + rel_seek_secs * 1000; /* target_time, start_time are ms, rel_seek_secs s */
  76
  77         orig_pos = stream_tell ( demuxer->stream );
  78
  79         if ( rel_seek_secs > 0 )
  80         {
  81                 /* Seeking forward */
  82
  83
  84                 while(current_time < target_time )
  85                 {
  86                         if (stream_read ( demuxer->stream, (char*)& rtjpeg_frameheader, sizeof ( rtjpeg_frameheader ) ) < sizeof(rtjpeg_frameheader))
  87                                 return; /* EOF */
  88                         le2me_rtframeheader(&rtjpeg_frameheader);
  89
  90                         if ( rtjpeg_frameheader.frametype == 'V' )
  91                         {
  92                                 priv->current_position->next = (nuv_position_t*) malloc ( sizeof ( nuv_position_t ) );
  93                                 priv->current_position = priv->current_position->next;
  94                                 priv->current_position->frame = priv->current_video_frame++;
  95                                 priv->current_position->time = rtjpeg_frameheader.timecode;
  96                                 priv->current_position->offset = orig_pos;
  97                                 priv->current_position->next = NULL;
  98
  99                                 if ( start_time == MAX_TIME )
 100                                 {
 101                                         start_time = rtjpeg_frameheader.timecode;
 102                                         /* Recalculate target time with real start time */
 103                                         target_time = start_time + rel_seek_secs*1000;
 104                                 }
 105
 106                                 current_time = rtjpeg_frameheader.timecode;
 107
 108                                 curr_pos = stream_tell ( demuxer->stream );
 109                                 stream_seek ( demuxer->stream, curr_pos + rtjpeg_frameheader.packetlength );
 110
 111                                 /* Adjust current sequence pointer */
 112                         }
 113                         else if ( rtjpeg_frameheader.frametype == 'A' )
 114                         {
 115                                 if ( start_time == MAX_TIME )
 116                                 {
 117                                         start_time = rtjpeg_frameheader.timecode;
 118                                         /* Recalculate target time with real start time */
 119                                         target_time = start_time + rel_seek_secs * 1000;
 120                                 }
 121                                 current_time = rtjpeg_frameheader.timecode;
 122
 123
 124                                 curr_pos = stream_tell ( demuxer->stream );
 125                                 stream_seek ( demuxer->stream, curr_pos + rtjpeg_frameheader.packetlength );
 126                         }
 127                 }
 128         }
 129         else
 130         {
 131                 /* Seeking backward */
 132                 nuv_position_t* p;
 133                 start_time = priv->current_position->time;
 134
 135                 /* Recalculate target time with real start time */
 136                 target_time = start_time + rel_seek_secs * 1000;
 137
 138
 139                 if(target_time < 0)
 140                         target_time = 0;
 141
 142                 // Search the target time in the index list, get the offset
 143                 // and go to that offset.
 144                 p = priv->index_list;
 145                 while ( ( p->next != NULL ) && ( p->time < target_time ) )
 146                 {
 147                         p = p->next;
 148                 }
 149                 stream_seek ( demuxer->stream, p->offset );
 150                 priv->current_video_frame = p->frame;
 151         }
 152 }
 153
 154
 155 static int demux_nuv_fill_buffer ( demuxer_t *demuxer, demux_stream_t *ds )
 156 {
 157         struct rtframeheader rtjpeg_frameheader;
 158         off_t orig_pos;
 159         nuv_priv_t* priv = demuxer->priv;
 160         int want_audio = (demuxer->audio)&&(demuxer->audio->id!=-2);
 161
 162         demuxer->filepos = orig_pos = stream_tell ( demuxer->stream );
 163         if (stream_read ( demuxer->stream, (char*)& rtjpeg_frameheader, sizeof ( rtjpeg_frameheader ) ) < sizeof(rtjpeg_frameheader))
 164             return 0; /* EOF */
 165         le2me_rtframeheader(&rtjpeg_frameheader);
 166
 167 #if 0
 168         printf("NUV frame: frametype: %c, comptype: %c, packetlength: %d\n",
 169             rtjpeg_frameheader.frametype, rtjpeg_frameheader.comptype,
 170             rtjpeg_frameheader.packetlength);
 171 #endif
 172
 173         /* Skip Seekpoint, Extended header and Sync for now */
 174         if ((rtjpeg_frameheader.frametype == 'R') ||
 175             (rtjpeg_frameheader.frametype == 'X') ||
 176             (rtjpeg_frameheader.frametype == 'S'))
 177             return 1;
 178
 179         /* Skip seektable and text (these have a payload) */
 180         if ((rtjpeg_frameheader.frametype == 'Q') ||
 181             (rtjpeg_frameheader.frametype == 'T')) {
 182           stream_skip(demuxer->stream, rtjpeg_frameheader.packetlength);
 183           return 1;
 184         }
 185
 186         if (((rtjpeg_frameheader.frametype == 'D') &&
 187             (rtjpeg_frameheader.comptype == 'R')) ||
 188             (rtjpeg_frameheader.frametype == 'V'))
 189         {
 190             if ( rtjpeg_frameheader.frametype == 'V' )
 191             {
 192                 priv->current_video_frame++;
 193                 priv->current_position->next = (nuv_position_t*) malloc(sizeof(nuv_position_t));
 194                 priv->current_position = priv->current_position->next;
 195                 priv->current_position->frame = priv->current_video_frame;
 196                 priv->current_position->time = rtjpeg_frameheader.timecode;
 197                 priv->current_position->offset = orig_pos;
 198                 priv->current_position->next = NULL;
 199             }
 200             /* put RTjpeg tables, Video info to video buffer */
 201             stream_seek ( demuxer->stream, orig_pos );
 202             ds_read_packet ( demuxer->video, demuxer->stream, rtjpeg_frameheader.packetlength + 12,
 203                     rtjpeg_frameheader.timecode*0.001, orig_pos, 0 );
 204
 205
 206         } else
 207         if (demuxer->audio && (rtjpeg_frameheader.frametype == 'A'))
 208         {
 209             priv->current_audio_frame++;
 210             if (want_audio) {
 211               /* put Audio to audio buffer */
 212               ds_read_packet ( demuxer->audio, demuxer->stream,
 213                                rtjpeg_frameheader.packetlength,
 214                                rtjpeg_frameheader.timecode*0.001,
 215                                orig_pos + 12, 0 );
 216             } else {
 217               /* skip audio block */
 218               stream_skip ( demuxer->stream,
 219                             rtjpeg_frameheader.packetlength );
 220             }
 221         }
 222
 223         return 1;
 224 }
 225
 226 /* Scan for the extended data in MythTV nuv streams */
 227 static int demux_xscan_nuv(demuxer_t* demuxer, int width, int height) {
 228   int i;
 229   off_t orig_pos = stream_tell(demuxer->stream);
 230   struct rtframeheader rtjpeg_frameheader;
 231   struct extendeddata ext;
 232   sh_video_t* sh_video = demuxer->video->sh;
 233   sh_audio_t* sh_audio = demuxer->audio->sh;
 234
 235   for (i = 0; i < 2; ++i) {
 236     if (stream_read(demuxer->stream, (char*)&rtjpeg_frameheader,
 237               sizeof(rtjpeg_frameheader)) < sizeof(rtjpeg_frameheader))
 238       goto out;
 239     le2me_rtframeheader(&rtjpeg_frameheader);
 240
 241     if (rtjpeg_frameheader.frametype != 'X')
 242       stream_skip(demuxer->stream, rtjpeg_frameheader.packetlength);
 243   }
 244
 245   if ( rtjpeg_frameheader.frametype != 'X' )
 246     goto out;
 247
 248   if (rtjpeg_frameheader.packetlength != sizeof(ext)) {
 249     mp_msg(MSGT_DEMUXER, MSGL_WARN,
 250            "NUV extended frame does not have expected length, ignoring\n");
 251     goto out;
 252   }
 253
 254   if (stream_read(demuxer->stream, (char*)&ext, sizeof(ext)) < sizeof(ext))
 255     goto out;
 256   le2me_extendeddata(&ext);
 257
 258   if (ext.version != 1) {
 259     mp_msg(MSGT_DEMUXER, MSGL_WARN,
 260            "NUV extended frame has unknown version number (%d), ignoring\n",
 261            ext.version);
 262     goto out;
 263   }
 264
 265   mp_msg(MSGT_DEMUXER, MSGL_V, "Detected MythTV stream\n");
 266
 267   /* Video parameters */
 268   mp_msg(MSGT_DEMUXER, MSGL_V, "FOURCC: %c%c%c%c\n",
 269          (ext.video_fourcc >> 24) & 0xff,
 270          (ext.video_fourcc >> 16) & 0xff,
 271          (ext.video_fourcc >> 8) & 0xff,
 272          (ext.video_fourcc) & 0xff);
 273   sh_video->format = ext.video_fourcc;
 274   sh_video->i_bps = ext.lavc_bitrate;
 275
 276   /* Audio parameters */
 277   if (ext.audio_fourcc == mmioFOURCC('L', 'A', 'M', 'E')) {
 278     sh_audio->format = 0x55;
 279   } else if (ext.audio_fourcc == mmioFOURCC('R', 'A', 'W', 'A')) {
 280     sh_audio->format = 0x1;
 281   } else {
 282     mp_msg(MSGT_DEMUXER, MSGL_WARN,
 283            "Unknown audio format 0x%x\n", ext.audio_fourcc);
 284   }
 285
 286   sh_audio->channels = ext.audio_channels;
 287   sh_audio->samplerate = ext.audio_sample_rate;
 288   sh_audio->i_bps = sh_audio->channels * sh_audio->samplerate *
 289                     ext.audio_bits_per_sample;
 290   if (sh_audio->format != 0x1)
 291     sh_audio->i_bps = nearestBitrate(sh_audio->i_bps /
 292                                      ext.audio_compression_ratio);
 293   sh_audio->wf->wFormatTag = sh_audio->format;
 294   sh_audio->wf->nChannels = sh_audio->channels;
 295   sh_audio->wf->nSamplesPerSec = sh_audio->samplerate;
 296   sh_audio->wf->nAvgBytesPerSec = sh_audio->i_bps / 8;
 297   sh_audio->wf->nBlockAlign = sh_audio->channels * 2;
 298   sh_audio->wf->wBitsPerSample = ext.audio_bits_per_sample;
 299   sh_audio->wf->cbSize = 0;
 300
 301   mp_msg(MSGT_DEMUXER, MSGL_V,
 302          "channels=%d bitspersample=%d samplerate=%d compression_ratio=%d\n",
 303           ext.audio_channels, ext.audio_bits_per_sample,
 304           ext.audio_sample_rate, ext.audio_compression_ratio);
 305   return 1;
 306 out:
 307   stream_reset(demuxer->stream);
 308   stream_seek(demuxer->stream, orig_pos);
 309   return 0;
 310 }
 311
 312 static demuxer_t* demux_open_nuv ( demuxer_t* demuxer )
 313 {
 314         sh_video_t *sh_video = NULL;
 315         sh_audio_t *sh_audio = NULL;
 316         struct rtfileheader rtjpeg_fileheader;
 317         nuv_priv_t* priv = (nuv_priv_t*) malloc ( sizeof ( nuv_priv_t) );
 318         demuxer->priv = priv;
 319         priv->current_audio_frame = 0;
 320         priv->current_video_frame = 0;
 321
 322
 323         /* Go to the start */
 324         stream_reset(demuxer->stream);
 325         stream_seek(demuxer->stream, 0);
 326
 327         stream_read ( demuxer->stream, (char*)& rtjpeg_fileheader, sizeof(rtjpeg_fileheader) );
 328         le2me_rtfileheader(&rtjpeg_fileheader);
 329
 330         /* no video */
 331         if (rtjpeg_fileheader.videoblocks == 0)
 332         {
 333             mp_msg(MSGT_DEMUXER, MSGL_INFO, MSGTR_MPDEMUX_NUV_NoVideoBlocksInFile);
 334             return NULL;
 335         }
 336
 337         /* Create a new video stream header */
 338         sh_video = new_sh_video ( demuxer, 0 );
 339
 340         /* Make sure the demuxer knows about the new video stream header
 341          * (even though new_sh_video() ought to take care of it)
 342          */
 343         demuxer->video->sh = sh_video;
 344
 345         /* Make sure that the video demuxer stream header knows about its
 346          * parent video demuxer stream (this is getting wacky), or else
 347          * video_read_properties() will choke
 348          */
 349         sh_video->ds = demuxer->video;
 350
 351         /* Custom fourcc for internal MPlayer use */
 352         sh_video->format = mmioFOURCC('N', 'U', 'V', '1');
 353
 354         sh_video->disp_w = rtjpeg_fileheader.width;
 355         sh_video->disp_h = rtjpeg_fileheader.height;
 356
 357         /* NuppelVideo uses pixel aspect ratio
 358            here display aspect ratio is used.
 359            For the moment NuppelVideo only supports 1.0 thus
 360            1.33 == 4:3 aspect ratio.
 361         */
 362         if(rtjpeg_fileheader.aspect == 1.0)
 363                 sh_video->aspect = (float) 4.0f/3.0f;
 364
 365         /* Get the FPS */
 366         sh_video->fps = rtjpeg_fileheader.fps;
 367         sh_video->frametime = 1 / sh_video->fps;
 368
 369         if (rtjpeg_fileheader.audioblocks != 0)
 370         {
 371             sh_audio = new_sh_audio(demuxer, 0);
 372             demuxer->audio->id = 0;
 373             demuxer->audio->sh = sh_audio;
 374             sh_audio->ds = demuxer->audio;
 375             sh_audio->format = 0x1;
 376             sh_audio->channels = 2;
 377             sh_audio->samplerate = 44100;
 378
 379             sh_audio->wf = malloc(sizeof(WAVEFORMATEX));
 380             memset(sh_audio->wf, 0, sizeof(WAVEFORMATEX));
 381             sh_audio->wf->wFormatTag = sh_audio->format;
 382             sh_audio->wf->nChannels = sh_audio->channels;
 383             sh_audio->wf->wBitsPerSample = 16;
 384             sh_audio->wf->nSamplesPerSec = sh_audio->samplerate;
 385             sh_audio->wf->nAvgBytesPerSec = sh_audio->wf->nChannels*
 386                 sh_audio->wf->wBitsPerSample*sh_audio->wf->nSamplesPerSec/8;
 387             sh_audio->wf->nBlockAlign = sh_audio->channels * 2;
 388             sh_audio->wf->cbSize = 0;
 389         }
 390
 391         /* Check for extended data (X frame) and read settings from it */
 392         if (!demux_xscan_nuv(demuxer, rtjpeg_fileheader.width,
 393                              rtjpeg_fileheader.height))
 394           /* Otherwise assume defaults */
 395           mp_msg(MSGT_DEMUXER, MSGL_V, "No NUV extended frame, using defaults\n");
 396
 397
 398         priv->index_list = (nuv_position_t*) malloc(sizeof(nuv_position_t));
 399         priv->index_list->frame = 0;
 400         priv->index_list->time = 0;
 401         priv->index_list->offset = stream_tell ( demuxer->stream );
 402         priv->index_list->next = NULL;
 403         priv->current_position = priv->index_list;
 404
 405         return demuxer;
 406 }
 407
 408 static int nuv_check_file ( demuxer_t* demuxer )
 409 {
 410         struct nuv_signature ns;
 411
 412         /* Store original position */
 413         off_t orig_pos = stream_tell(demuxer->stream);
 414
 415         mp_msg ( MSGT_DEMUX, MSGL_V, "Checking for NuppelVideo\n" );
 416
 417         if(stream_read(demuxer->stream,(char*)&ns,sizeof(ns)) != sizeof(ns))
 418                 return 0;
 419
 420         if ( strncmp ( ns.finfo, "NuppelVideo", 12 ) &&
 421              strncmp ( ns.finfo, "MythTVVideo", 12 ) )
 422                 return 0; /* Not a NuppelVideo file */
 423         if ( strncmp ( ns.version, "0.05", 5 ) &&
 424              strncmp ( ns.version, "0.06", 5 ) &&
 425              strncmp ( ns.version, "0.07", 5 ) )
 426                 return 0; /* Wrong version NuppelVideo file */
 427
 428         /* Return to original position */
 429         stream_seek ( demuxer->stream, orig_pos );
 430         return DEMUXER_TYPE_NUV;
 431 }
 432
 433 static void demux_close_nuv(demuxer_t* demuxer) {
 434   nuv_priv_t* priv = demuxer->priv;
 435   nuv_position_t* pos;
 436   if(!priv)
 437     return;
 438   for(pos = priv->index_list ; pos != NULL ; ) {
 439     nuv_position_t* p = pos;
 440     pos = pos->next;
 441     free(p);
 442   }
 443   free(priv);
 444 }
 445
 446
 447 const demuxer_desc_t demuxer_desc_nuv = {
 448   "NuppelVideo demuxer",
 449   "nuv",
 450   "NuppelVideo",
 451   "Panagiotis Issaris",
 452   "",
 453   DEMUXER_TYPE_NUV,
 454   1, // safe autodetect
 455   nuv_check_file,
 456   demux_nuv_fill_buffer,
 457   demux_open_nuv,
 458   demux_close_nuv,
 459   demux_seek_nuv,
 460   NULL
 461 };