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 #include "help_mp.h"
  29
  30 #include "stream/stream.h"
  31 #include "aviprint.h"
  32 #include "demuxer.h"
  33 #include "stheader.h"
  34
  35
  36 #define FOURCC_DOTRA mmioFOURCC('.','r','a', 0xfd)
  37 #define FOURCC_144 mmioFOURCC('1','4','_','4')
  38 #define FOURCC_288 mmioFOURCC('2','8','_','8')
  39 #define FOURCC_DNET mmioFOURCC('d','n','e','t')
  40 #define FOURCC_LPCJ mmioFOURCC('l','p','c','J')
  41 #define FOURCC_SIPR mmioFOURCC('s','i','p','r')
  42 #define INTLID_INT4 mmioFOURCC('I','n','t','4')
  43 #define INTLID_SIPR mmioFOURCC('s','i','p','r')
  44
  45
  46 static unsigned char sipr_swaps[38][2]={
  47     {0,63},{1,22},{2,44},{3,90},{5,81},{7,31},{8,86},{9,58},{10,36},{12,68},
  48     {13,39},{14,73},{15,53},{16,69},{17,57},{19,88},{20,34},{21,71},{24,46},
  49     {25,94},{26,54},{28,75},{29,50},{32,70},{33,92},{35,74},{38,85},{40,56},
  50     {42,87},{43,65},{45,59},{48,79},{49,93},{51,89},{55,95},{61,76},{67,83},
  51     {77,80} };
  52
  53 // Map flavour to bytes per second
  54 static int sipr_fl2bps[4] = {813, 1062, 625, 2000}; // 6.5, 8.5, 5, 16 kbit per second
  55
  56
  57 typedef struct {
  58         unsigned short version;
  59         unsigned int dotranum;
  60         unsigned int data_size;
  61         unsigned short version2;
  62         unsigned int hdr_size;
  63         unsigned short codec_flavor;
  64         unsigned int coded_framesize;
  65         unsigned short sub_packet_h;
  66         unsigned short frame_size;
  67         unsigned short sub_packet_size;
  68         unsigned intl_id;
  69         unsigned char *audio_buf;
  70 } ra_priv_t;
  71
  72
  73
  74 static int ra_check_file(demuxer_t* demuxer)
  75 {
  76         unsigned int chunk_id;
  77
  78         chunk_id = stream_read_dword_le(demuxer->stream);
  79         if (chunk_id == FOURCC_DOTRA)
  80                 return DEMUXER_TYPE_REALAUDIO;
  81         else
  82                 return 0;
  83 }
  84
  85
  86
  87 // return value:
  88 //     0 = EOF or no stream found
  89 //     1 = successfully read a packet
  90 static int demux_ra_fill_buffer(demuxer_t *demuxer, demux_stream_t *dsds)
  91 {
  92         ra_priv_t *ra_priv = demuxer->priv;
  93         int len;
  94         demux_stream_t *ds = demuxer->audio;
  95         sh_audio_t *sh = ds->sh;
  96         WAVEFORMATEX *wf = sh->wf;
  97         demux_packet_t *dp;
  98         int x, y;
  99
 100   if (demuxer->stream->eof)
 101     return 0;
 102
 103         len = wf->nBlockAlign;
 104         demuxer->filepos = stream_tell(demuxer->stream);
 105
 106     if ((ra_priv->intl_id == INTLID_INT4) || (ra_priv->intl_id == INTLID_SIPR)) {
 107       if (ra_priv->intl_id == INTLID_SIPR) {
 108         int n;
 109         int bs = ra_priv->sub_packet_h * ra_priv->frame_size * 2 / 96;  // nibbles per subpacket
 110         stream_read(demuxer->stream, ra_priv->audio_buf, ra_priv->sub_packet_h * ra_priv->frame_size);
 111         // Perform reordering
 112         for(n = 0; n < 38; n++) {
 113             int j;
 114             int i = bs * sipr_swaps[n][0];
 115             int o = bs * sipr_swaps[n][1];
 116             // swap nibbles of block 'i' with 'o'      TODO: optimize
 117             for(j = 0; j < bs; j++) {
 118                 int x = (i & 1) ? (ra_priv->audio_buf[i >> 1] >> 4) : (ra_priv->audio_buf[i >> 1] & 0x0F);
 119                 int y = (o & 1) ? (ra_priv->audio_buf[o >> 1] >> 4) : (ra_priv->audio_buf[o >> 1] & 0x0F);
 120                 if(o & 1)
 121                     ra_priv->audio_buf[o >> 1] = (ra_priv->audio_buf[o >> 1] & 0x0F) | (x << 4);
 122                 else
 123                     ra_priv->audio_buf[o >> 1] = (ra_priv->audio_buf[o >> 1] & 0xF0) | x;
 124                 if(i & 1)
 125                     ra_priv->audio_buf[i >> 1] = (ra_priv->audio_buf[i >> 1] & 0x0F) | (y << 4);
 126                 else
 127                     ra_priv->audio_buf[i >> 1] = (ra_priv->audio_buf[i >> 1] & 0xF0) | y;
 128                 ++i; ++o;
 129             }
 130         }
 131       } else {
 132         for (y = 0; y < ra_priv->sub_packet_h; y++)
 133             for (x = 0; x < ra_priv->sub_packet_h / 2; x++)
 134                 stream_read(demuxer->stream, ra_priv->audio_buf + x * 2 *ra_priv->frame_size +
 135                             y * ra_priv->coded_framesize, ra_priv->coded_framesize);
 136       }
 137         // Release all the audio packets
 138         for (x = 0; x < ra_priv->sub_packet_h * ra_priv->frame_size / len; x++) {
 139             dp = new_demux_packet(len);
 140             memcpy(dp->buffer, ra_priv->audio_buf + x * len, len);
 141             dp->pts = x ? 0 : demuxer->filepos / ra_priv->data_size;
 142             dp->pos = demuxer->filepos; // all equal
 143             dp->flags = x ? 0 : 0x10; // Mark first packet as keyframe
 144             ds_add_packet(ds, dp);
 145         }
 146     } else {
 147         dp = new_demux_packet(len);
 148         stream_read(demuxer->stream, dp->buffer, len);
 149
 150         dp->pts = demuxer->filepos / ra_priv->data_size;
 151         dp->pos = demuxer->filepos;
 152         dp->flags = 0;
 153         ds_add_packet(ds, dp);
 154     }
 155
 156         return 1;
 157 }
 158
 159
 160
 161 static demuxer_t* demux_open_ra(demuxer_t* demuxer)
 162 {
 163         ra_priv_t* ra_priv = demuxer->priv;
 164         sh_audio_t *sh;
 165         int i;
 166         char *buf;
 167
 168   if ((ra_priv = malloc(sizeof(ra_priv_t))) == NULL) {
 169     mp_msg(MSGT_DEMUX, MSGL_ERR, "[RealAudio] Can't allocate memory for private data.\n");
 170     return 0;
 171   }
 172         memset(ra_priv, 0, sizeof(ra_priv_t));
 173
 174         demuxer->priv = ra_priv;
 175         sh = new_sh_audio(demuxer, 0);
 176         demuxer->audio->id = 0;
 177         sh->ds=demuxer->audio;
 178         demuxer->audio->sh = sh;
 179
 180         ra_priv->version = stream_read_word(demuxer->stream);
 181         mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] File version: %d\n", ra_priv->version);
 182         if ((ra_priv->version < 3) || (ra_priv->version > 4)) {
 183                 mp_msg(MSGT_DEMUX,MSGL_WARN,"[RealAudio] ra version %d is not supported yet, please "
 184                         "contact MPlayer developers\n", ra_priv->version);
 185                 return 0;
 186         }
 187         if (ra_priv->version == 3) {
 188                 ra_priv->hdr_size = stream_read_word(demuxer->stream);
 189                 stream_skip(demuxer->stream, 10);
 190                 ra_priv->data_size = stream_read_dword(demuxer->stream);
 191         } else {
 192                 stream_skip(demuxer->stream, 2);
 193                 ra_priv->dotranum = stream_read_dword(demuxer->stream);
 194                 ra_priv->data_size = stream_read_dword(demuxer->stream);
 195                 ra_priv->version2 = stream_read_word(demuxer->stream);
 196                 ra_priv->hdr_size = stream_read_dword(demuxer->stream);
 197                 ra_priv->codec_flavor = stream_read_word(demuxer->stream);
 198                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Flavor: %d\n", ra_priv->codec_flavor);
 199                 ra_priv->coded_framesize = stream_read_dword(demuxer->stream);
 200                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Coded frame size: %d\n", ra_priv->coded_framesize);
 201                 stream_skip(demuxer->stream, 4); // data size?
 202                 stream_skip(demuxer->stream, 8);
 203                 ra_priv->sub_packet_h = stream_read_word(demuxer->stream);
 204                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Sub packet h: %d\n", ra_priv->sub_packet_h);
 205                 ra_priv->frame_size = stream_read_word(demuxer->stream);
 206                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Frame size: %d\n", ra_priv->frame_size);
 207                 ra_priv->sub_packet_size = stream_read_word(demuxer->stream);
 208                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] Sub packet size: %d\n", ra_priv->sub_packet_size);
 209                 stream_skip(demuxer->stream, 2);
 210                 sh->samplerate = stream_read_word(demuxer->stream);
 211                 stream_skip(demuxer->stream, 2);
 212                 sh->samplesize = stream_read_word(demuxer->stream);
 213                 sh->channels = stream_read_word(demuxer->stream);
 214                 mp_msg(MSGT_DEMUX,MSGL_V,"[RealAudio] %d channel, %d bit, %dHz\n", sh->channels,
 215                         sh->samplesize, sh->samplerate);
 216                 i = stream_read_char(demuxer->stream);
 217                 ra_priv->intl_id = stream_read_dword_le(demuxer->stream);
 218                 if (i != 4) {
 219                         mp_msg(MSGT_DEMUX,MSGL_WARN,"[RealAudio] Interleaver Id size is not 4 (%d), please report to "
 220                                 "MPlayer developers\n", i);
 221                         stream_skip(demuxer->stream, i - 4);
 222                 }
 223                 i = stream_read_char(demuxer->stream);
 224                 sh->format = stream_read_dword_le(demuxer->stream);
 225                 if (i != 4) {
 226                         mp_msg(MSGT_DEMUX,MSGL_WARN,"[RealAudio] FourCC size is not 4 (%d), please report to "
 227                                 "MPlayer developers\n", i);
 228                         stream_skip(demuxer->stream, i - 4);
 229                 }
 230                 stream_skip(demuxer->stream, 3);
 231         }
 232
 233         if ((i = stream_read_char(demuxer->stream)) != 0) {
 234                 buf = malloc(i+1);
 235                 stream_read(demuxer->stream, buf, i);
 236                 buf[i] = 0;
 237                 demux_info_add(demuxer, "Title", buf);
 238                 free(buf);
 239         }
 240         if ((i = stream_read_char(demuxer->stream)) != 0) {
 241                 buf = malloc(i+1);
 242                 stream_read(demuxer->stream, buf, i);
 243                 buf[i] = 0;
 244                 demux_info_add(demuxer, "Author", buf);
 245                 free(buf);
 246         }
 247         if ((i = stream_read_char(demuxer->stream)) != 0) {
 248                 buf = malloc(i+1);
 249                 stream_read(demuxer->stream, buf, i);
 250                 buf[i] = 0;
 251                 demux_info_add(demuxer, "Copyright", buf);
 252                 free(buf);
 253         }
 254
 255         if ((i = stream_read_char(demuxer->stream)) != 0) {
 256                 buf = malloc(i+1);
 257                 stream_read(demuxer->stream, buf, i);
 258                 buf[i] = 0;
 259                 demux_info_add(demuxer, "Comment", buf);
 260                 free(buf);
 261         }
 262
 263         if (ra_priv->version == 3) {
 264             if(ra_priv->hdr_size + 8 > stream_tell(demuxer->stream)) {
 265                 stream_skip(demuxer->stream, 1);
 266                 i = stream_read_char(demuxer->stream);
 267                 sh->format = stream_read_dword_le(demuxer->stream);
 268                 if (i != 4) {
 269                         mp_msg(MSGT_DEMUX,MSGL_WARN,"[RealAudio] FourCC size is not 4 (%d), please report to "
 270                                 "MPlayer developers\n", i);
 271                         stream_skip(demuxer->stream, i - 4);
 272                 }
 273
 274                 if (sh->format != FOURCC_LPCJ) {
 275                         mp_msg(MSGT_DEMUX,MSGL_WARN,"[RealAudio] Version 3 with FourCC %8x, please report to "
 276                                 "MPlayer developers\n", sh->format);
 277                 }
 278             } else
 279                 // If a stream does not have fourcc, let's assume it's 14.4
 280                 sh->format = FOURCC_LPCJ;
 281
 282                 sh->channels = 1;
 283                 sh->samplesize = 16;
 284                 sh->samplerate = 8000;
 285                 ra_priv->frame_size = 240;
 286                 sh->format = FOURCC_144;
 287         }
 288
 289         /* Fill WAVEFORMATEX */
 290         sh->wf = malloc(sizeof(WAVEFORMATEX));
 291         memset(sh->wf, 0, sizeof(WAVEFORMATEX));
 292         sh->wf->nChannels = sh->channels;
 293         sh->wf->wBitsPerSample = sh->samplesize;
 294         sh->wf->nSamplesPerSec = sh->samplerate;
 295         sh->wf->nAvgBytesPerSec = sh->samplerate*sh->samplesize/8;
 296         sh->wf->nBlockAlign = ra_priv->frame_size;
 297         sh->wf->cbSize = 0;
 298         sh->wf->wFormatTag = sh->format;
 299
 300         switch (sh->format) {
 301                 case FOURCC_144:
 302                         mp_msg(MSGT_DEMUX,MSGL_V,"Audio: 14_4\n");
 303             sh->wf->nBlockAlign = 0x14;
 304                         break;
 305                 case FOURCC_288:
 306                         mp_msg(MSGT_DEMUX,MSGL_V,"Audio: 28_8\n");
 307             sh->wf->nBlockAlign = ra_priv->coded_framesize;
 308             ra_priv->audio_buf = calloc(ra_priv->sub_packet_h, ra_priv->frame_size);
 309                         break;
 310                 case FOURCC_DNET:
 311                         mp_msg(MSGT_DEMUX,MSGL_V,"Audio: DNET -> AC3\n");
 312                         break;
 313                 case FOURCC_SIPR:
 314                         mp_msg(MSGT_DEMUX,MSGL_V,"Audio: SIPR\n");
 315                         sh->wf->nBlockAlign = ra_priv->coded_framesize;
 316                         sh->wf->nAvgBytesPerSec = sipr_fl2bps[ra_priv->codec_flavor];
 317                         ra_priv->audio_buf = calloc(ra_priv->sub_packet_h, ra_priv->frame_size);
 318                         break;
 319                 default:
 320                         mp_msg(MSGT_DEMUX,MSGL_V,"Audio: Unknown (%d)\n", sh->format);
 321         }
 322
 323         print_wave_header(sh->wf, MSGL_V);
 324
 325         /* disable seeking */
 326         demuxer->seekable = 0;
 327
 328         if(!ds_fill_buffer(demuxer->audio))
 329                 mp_msg(MSGT_DEMUXER,MSGL_INFO,"[RealAudio] No data.\n");
 330
 331     return demuxer;
 332 }
 333
 334
 335
 336 static void demux_close_ra(demuxer_t *demuxer)
 337 {
 338         ra_priv_t* ra_priv = demuxer->priv;
 339
 340     if (ra_priv) {
 341             if (ra_priv->audio_buf)
 342                 free (ra_priv->audio_buf);
 343                 free(ra_priv);
 344     }
 345         return;
 346 }
 347
 348
 349 #if 0
 350 /* please upload RV10 samples WITH INDEX CHUNK */
 351 int demux_seek_ra(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags)
 352 {
 353     real_priv_t *priv = demuxer->priv;
 354     demux_stream_t *d_audio = demuxer->audio;
 355     sh_audio_t *sh_audio = d_audio->sh;
 356     int aid = d_audio->id;
 357     int next_offset = 0;
 358     int rel_seek_frames = 0;
 359     int streams = 0;
 360
 361     return stream_seek(demuxer->stream, next_offset);
 362 }
 363 #endif
 364
 365
 366 const demuxer_desc_t demuxer_desc_realaudio = {
 367   "Realaudio demuxer",
 368   "realaudio",
 369   "REALAUDIO",
 370   "Roberto Togni",
 371   "handles old audio only .ra files",
 372   DEMUXER_TYPE_REALAUDIO,
 373   1, // safe autodetect
 374   ra_check_file,
 375   demux_ra_fill_buffer,
 376   demux_open_ra,
 377   demux_close_ra,
 378   NULL,
 379   NULL
 380 };