libmpdemux/demux_realaud.c

   1 /*
   2  * Realaudio demuxer
   3  * copyright (c) 2003, 2005 Roberto Togni
   4  *
   5  * This file is part of MPlayer.
   6  *
   7  * MPlayer is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * MPlayer is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25
  26 #include "config.h"
  27 #include "mp_msg.h"
  28
  29 #include "stream/stream.h"
  30 #include "aviprint.h"
  31 #include "demuxer.h"
  32 #include "stheader.h"
  33
  34
  35 #define FOURCC_DOTRA mmioFOURCC('.','r','a', 0xfd)
  36 #define FOURCC_144 mmioFOURCC('1','4','_','4')
  37 #define FOURCC_288 mmioFOURCC('2','8','_','8')
  38 #define FOURCC_DNET mmioFOURCC('d','n','e','t')
  39 #define FOURCC_LPCJ mmioFOURCC('l','p','c','J')
  40 #define FOURCC_SIPR mmioFOURCC('s','i','p','r')
  41 #define INTLID_INT4 mmioFOURCC('I','n','t','4')
  42 #define INTLID_SIPR mmioFOURCC('s','i','p','r')
  43
  44
  45 static unsigned char sipr_swaps[38][2]={
  46     {0,63},{1,22},{2,44},{3,90},{5,81},{7,31},{8,86},{9,58},{10,36},{12,68},
  47     {13,39},{14,73},{15,53},{16,69},{17,57},{19,88},{20,34},{21,71},{24,46},
  48     {25,94},{26,54},{28,75},{29,50},{32,70},{33,92},{35,74},{38,85},{40,56},
  49     {42,87},{43,65},{45,59},{48,79},{49,93},{51,89},{55,95},{61,76},{67,83},
  50     {77,80} };
  51
  52 // Map flavour to bytes per second
  53 static int sipr_fl2bps[4] = {813, 1062, 625, 2000}; // 6.5, 8.5, 5, 16 kbit per second
  54
  55
  56 typedef struct {
  57         unsigned short version;
  58         unsigned int dotranum;
  59         unsigned int data_size;
  60         unsigned short version2;
  61         unsigned int hdr_size;
  62         unsigned short codec_flavor;
  63         unsigned int coded_framesize;
  64         unsigned short sub_packet_h;
  65         unsigned short frame_size;
  66         unsigned short sub_packet_size;
  67         unsigned intl_id;
  68         unsigned char *audio_buf;
  69 } ra_priv_t;
  70
  71
  72
  73 static int ra_check_file(demuxer_t* demuxer)
  74 {
  75         unsigned int chunk_id;
  76
  77         chunk_id = stream_read_dword_le(demuxer->stream);
  78         if (chunk_id == FOURCC_DOTRA)
  79                 return DEMUXER_TYPE_REALAUDIO;
  80         else
  81                 return 0;
  82 }
  83
  84
  85
  86 // return value:
  87 //     0 = EOF or no stream found
  88 //     1 = successfully read a packet
  89 static int demux_ra_fill_buffer(demuxer_t *demuxer, demux_stream_t *dsds)
  90 {
  91         ra_priv_t *ra_priv = demuxer->priv;
  92         int len;
  93         demux_stream_t *ds = demuxer->audio;
  94         sh_audio_t *sh = ds->sh;
  95         WAVEFORMATEX *wf = sh->wf;
  96         demux_packet_t *dp;
  97         int x, y;
  98
  99   if (demuxer->stream->eof)
 100     return 0;
 101
 102         len = wf->nBlockAlign;
 103         demuxer->filepos = stream_tell(demuxer->stream);
 104
 105     if ((ra_priv->intl_id == INTLID_INT4) || (ra_priv->intl_id == INTLID_SIPR)) {
 106       if (ra_priv->intl_id == INTLID_SIPR) {
 107         int n;
 108         int bs = ra_priv->sub_packet_h * ra_priv->frame_size * 2 / 96;  // nibbles per subpacket
 109         stream_read(demuxer->stream, ra_priv->audio_buf, ra_priv->sub_packet_h * ra_priv->frame_size);
 110         // Perform reordering
 111         for(n = 0; n < 38; n++) {
 112             int j;
 113             int i = bs * sipr_swaps[n][0];
 114             int o = bs * sipr_swaps[n][1];
 115             // swap nibbles of block 'i' with 'o'      TODO: optimize
 116             for(j = 0; j < bs; j++) {
 117                 int x = (i & 1) ? (ra_priv->audio_buf[i >> 1] >> 4) : (ra_priv->audio_buf[i >> 1] & 0x0F);
 118                 int y = (o & 1) ? (ra_priv->audio_buf[o >> 1] >> 4) : (ra_priv->audio_buf[o >> 1] & 0x0F);
 119                 if(o & 1)
 120                     ra_priv->audio_buf[o >> 1] = (ra_priv->audio_buf[o >> 1] & 0x0F) | (x << 4);
 121                 else
 122                     ra_priv->audio_buf[o >> 1] = (ra_priv->audio_buf[o >> 1] & 0xF0) | x;
 123                 if(i & 1)
 124                     ra_priv->audio_buf[i >> 1] = (ra_priv->audio_buf[i >> 1] & 0x0F) | (y << 4);
 125                 else
 126                     ra_priv->audio_buf[i >> 1] = (ra_priv->audio_buf[i >> 1] & 0xF0) | y;
 127                 ++i; ++o;
 128             }
 129         }
 130       } else {
 131         for (y = 0; y < ra_priv->sub_packet_h; y++)
 132             for (x = 0; x < ra_priv->sub_packet_h / 2; x++)
 133                 stream_read(demuxer->stream, ra_priv->audio_buf + x * 2 *ra_priv->frame_size +
 134                             y * ra_priv->coded_framesize, ra_priv->coded_framesize);
 135       }
 136         // Release all the audio packets
 137         for (x = 0; x < ra_priv->sub_packet_h * ra_priv->frame_size / len; x++) {
 138             dp = new_demux_packet(len);
 139             memcpy(dp->buffer, ra_priv->audio_buf + x * len, len);
 140             dp->pts = x ? 0 : demuxer->filepos / ra_priv->data_size;
 141             dp->pos = demuxer->filepos; // all equal
 142             dp->flags = x ? 0 : 0x10; // Mark first packet as keyframe
 143             ds_add_packet(ds, dp);
 144         }
 145     } else {
 146         dp = new_demux_packet(len);
 147         stream_read(demuxer->stream, dp->buffer, len);
 148
 149         dp->pts = demuxer->filepos / ra_priv->data_size;
 150         dp->pos = demuxer->filepos;
 151         dp->flags = 0;
 152         ds_add_packet(ds, dp);
 153     }
 154
 155         return 1;
 156 }
 157
 158
 159
 160 static demuxer_t* demux_open_ra(demuxer_t* demuxer)
 161 {
 162         ra_priv_t* ra_priv = demuxer->priv;
 163         sh_audio_t *sh;
 164         int i;
 165         char *buf;
 166
 167   if ((ra_priv = malloc(sizeof(ra_priv_t))) == NULL) {
 168     mp_msg(MSGT_DEMUX, MSGL_ERR, "[RealAudio] Can't allocate memory for private data.\n");
 169     return 0;
 170   }
 171         memset(ra_priv, 0, sizeof(ra_priv_t));
 172
 173         demuxer->priv = ra_priv;
 174         sh = new_sh_audio(demuxer, 0);
 175         demuxer->audio->id = 0;
 176         sh->ds=demuxer->audio;
 177         demuxer->audio->sh = sh;
 178
 179         ra_priv->version = stream_read_word(demuxer->stream);
 180         mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] File version: %d\n", ra_priv->version);
 181         if ((ra_priv->version < 3) || (ra_priv->version > 4)) {
 182                 mp_msg(MSGT_DEMUX,MSGL_WARN,"[RealAudio] ra version %d is not supported yet, please "
 183                         "contact MPlayer developers\n", ra_priv->version);
 184                 return 0;
 185         }
 186         if (ra_priv->version == 3) {
 187                 ra_priv->hdr_size = stream_read_word(demuxer->stream);
 188                 stream_skip(demuxer->stream, 10);
 189                 ra_priv->data_size = stream_read_dword(demuxer->stream);
 190         } else {
 191                 stream_skip(demuxer->stream, 2);
 192                 ra_priv->dotranum = stream_read_dword(demuxer->stream);
 193                 ra_priv->data_size = stream_read_dword(demuxer->stream);
 194                 ra_priv->version2 = stream_read_word(demuxer->stream);
 195                 ra_priv->hdr_size = stream_read_dword(demuxer->stream);
 196                 ra_priv->codec_flavor = stream_read_word(demuxer->stream);
 197                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Flavor: %d\n", ra_priv->codec_flavor);
 198                 ra_priv->coded_framesize = stream_read_dword(demuxer->stream);
 199                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Coded frame size: %d\n", ra_priv->coded_framesize);
 200                 stream_skip(demuxer->stream, 4); // data size?
 201                 stream_skip(demuxer->stream, 8);
 202                 ra_priv->sub_packet_h = stream_read_word(demuxer->stream);
 203                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Sub packet h: %d\n", ra_priv->sub_packet_h);
 204                 ra_priv->frame_size = stream_read_word(demuxer->stream);
 205                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Frame size: %d\n", ra_priv->frame_size);
 206                 ra_priv->sub_packet_size = stream_read_word(demuxer->stream);
 207                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Sub packet size: %d\n", ra_priv->sub_packet_size);
 208                 stream_skip(demuxer->stream, 2);
 209                 sh->samplerate = stream_read_word(demuxer->stream);
 210                 stream_skip(demuxer->stream, 2);
 211                 sh->samplesize = stream_read_word(demuxer->stream);
 212                 sh->channels = stream_read_word(demuxer->stream);
 213                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] %d channel, %d bit, %dHz\n", sh->channels,
 214                         sh->samplesize, sh->samplerate);
 215                 i = stream_read_char(demuxer->stream);
 216                 ra_priv->intl_id = stream_read_dword_le(demuxer->stream);
 217                 if (i != 4) {
 218                         mp_msg(MSGT_DEMUX,MSGL_WARN,"[RealAudio] Interleaver Id size is not 4 (%d), please report to "
 219                                 "MPlayer developers\n", i);
 220                         stream_skip(demuxer->stream, i - 4);
 221                 }
 222                 i = stream_read_char(demuxer->stream);
 223                 sh->format = stream_read_dword_le(demuxer->stream);
 224                 if (i != 4) {
 225                         mp_msg(MSGT_DEMUX,MSGL_WARN,"[RealAudio] FourCC size is not 4 (%d), please report to "
 226                                 "MPlayer developers\n", i);
 227                         stream_skip(demuxer->stream, i - 4);
 228                 }
 229                 stream_skip(demuxer->stream, 3);
 230         }
 231
 232         if ((i = stream_read_char(demuxer->stream)) != 0) {
 233                 buf = malloc(i+1);
 234                 stream_read(demuxer->stream, buf, i);
 235                 buf[i] = 0;
 236                 demux_info_add(demuxer, "Title", buf);
 237                 free(buf);
 238         }
 239         if ((i = stream_read_char(demuxer->stream)) != 0) {
 240                 buf = malloc(i+1);
 241                 stream_read(demuxer->stream, buf, i);
 242                 buf[i] = 0;
 243                 demux_info_add(demuxer, "Author", buf);
 244                 free(buf);
 245         }
 246         if ((i = stream_read_char(demuxer->stream)) != 0) {
 247                 buf = malloc(i+1);
 248                 stream_read(demuxer->stream, buf, i);
 249                 buf[i] = 0;
 250                 demux_info_add(demuxer, "Copyright", buf);
 251                 free(buf);
 252         }
 253
 254         if ((i = stream_read_char(demuxer->stream)) != 0) {
 255                 buf = malloc(i+1);
 256                 stream_read(demuxer->stream, buf, i);
 257                 buf[i] = 0;
 258                 demux_info_add(demuxer, "Comment", buf);
 259                 free(buf);
 260         }
 261
 262         if (ra_priv->version == 3) {
 263             if(ra_priv->hdr_size + 8 > stream_tell(demuxer->stream)) {
 264                 stream_skip(demuxer->stream, 1);
 265                 i = stream_read_char(demuxer->stream);
 266                 sh->format = stream_read_dword_le(demuxer->stream);
 267                 if (i != 4) {
 268                         mp_msg(MSGT_DEMUX,MSGL_WARN,"[RealAudio] FourCC size is not 4 (%d), please report to "
 269                                 "MPlayer developers\n", i);
 270                         stream_skip(demuxer->stream, i - 4);
 271                 }
 272
 273                 if (sh->format != FOURCC_LPCJ) {
 274                         mp_msg(MSGT_DEMUX,MSGL_WARN,"[RealAudio] Version 3 with FourCC %8x, please report to "
 275                                 "MPlayer developers\n", sh->format);
 276                 }
 277             } else
 278                 // If a stream does not have fourcc, let's assume it's 14.4
 279                 sh->format = FOURCC_LPCJ;
 280
 281                 sh->channels = 1;
 282                 sh->samplesize = 16;
 283                 sh->samplerate = 8000;
 284                 ra_priv->frame_size = 240;
 285                 sh->format = FOURCC_144;
 286         }
 287
 288         /* Fill WAVEFORMATEX */
 289         sh->wf = calloc(1, sizeof(*sh->wf));
 290         sh->wf->nChannels = sh->channels;
 291         sh->wf->wBitsPerSample = sh->samplesize;
 292         sh->wf->nSamplesPerSec = sh->samplerate;
 293         sh->wf->nAvgBytesPerSec = sh->samplerate*sh->samplesize/8;
 294         sh->wf->nBlockAlign = ra_priv->frame_size;
 295         sh->wf->cbSize = 0;
 296         sh->wf->wFormatTag = sh->format;
 297
 298         switch (sh->format) {
 299                 case FOURCC_144:
 300                         mp_msg(MSGT_DEMUX,MSGL_V,"Audio: 14_4\n");
 301             sh->wf->nBlockAlign = 0x14;
 302                         break;
 303                 case FOURCC_288:
 304                         mp_msg(MSGT_DEMUX,MSGL_V,"Audio: 28_8\n");
 305             sh->wf->nBlockAlign = ra_priv->coded_framesize;
 306             ra_priv->audio_buf = calloc(ra_priv->sub_packet_h, ra_priv->frame_size);
 307                         break;
 308                 case FOURCC_DNET:
 309                         mp_msg(MSGT_DEMUX,MSGL_V,"Audio: DNET -> AC3\n");
 310                         break;
 311                 case FOURCC_SIPR:
 312                         mp_msg(MSGT_DEMUX,MSGL_V,"Audio: SIPR\n");
 313                         sh->wf->nBlockAlign = ra_priv->coded_framesize;
 314                         sh->wf->nAvgBytesPerSec = sipr_fl2bps[ra_priv->codec_flavor];
 315                         ra_priv->audio_buf = calloc(ra_priv->sub_packet_h, ra_priv->frame_size);
 316                         break;
 317                 default:
 318                         mp_msg(MSGT_DEMUX,MSGL_V,"Audio: Unknown (%d)\n", sh->format);
 319         }
 320
 321         print_wave_header(sh->wf, MSGL_V);
 322
 323         /* disable seeking */
 324         demuxer->seekable = 0;
 325
 326         if(!ds_fill_buffer(demuxer->audio))
 327                 mp_msg(MSGT_DEMUXER,MSGL_INFO,"[RealAudio] No data.\n");
 328
 329     return demuxer;
 330 }
 331
 332
 333
 334 static void demux_close_ra(demuxer_t *demuxer)
 335 {
 336     ra_priv_t* ra_priv = demuxer->priv;
 337
 338     if (ra_priv) {
 339         free(ra_priv->audio_buf);
 340         free(ra_priv);
 341     }
 342 }
 343
 344
 345 #if 0
 346 /* please upload RV10 samples WITH INDEX CHUNK */
 347 int demux_seek_ra(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags)
 348 {
 349     real_priv_t *priv = demuxer->priv;
 350     demux_stream_t *d_audio = demuxer->audio;
 351     sh_audio_t *sh_audio = d_audio->sh;
 352     int aid = d_audio->id;
 353     int next_offset = 0;
 354     int rel_seek_frames = 0;
 355     int streams = 0;
 356
 357     return stream_seek(demuxer->stream, next_offset);
 358 }
 359 #endif
 360
 361
 362 const demuxer_desc_t demuxer_desc_realaudio = {
 363   "Realaudio demuxer",
 364   "realaudio",
 365   "REALAUDIO",
 366   "Roberto Togni",
 367   "handles old audio only .ra files",
 368   DEMUXER_TYPE_REALAUDIO,
 369   1, // safe autodetect
 370   ra_check_file,
 371   demux_ra_fill_buffer,
 372   demux_open_ra,
 373   demux_close_ra,
 374   NULL,
 375   NULL
 376 };