libmpdemux/demux_lmlm4.c

   1 /*
   2  * LMLM4 MPEG4 Compression Card stream & file parser
   3  * Copyright (C) 2003 Maxim Yevtyushkin <max@linuxmedialabs.com>
   4  * based on SMJPEG file parser by Alex Beregszaszi
   5  *
   6  * This file is part of MPlayer.
   7  *
   8  * MPlayer is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * MPlayer is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26 #include <string.h> /* strtok */
  27
  28 #include "config.h"
  29 #include "mp_msg.h"
  30
  31 #include "stream/stream.h"
  32 #include "demuxer.h"
  33 #include "stheader.h"
  34
  35 typedef struct FrameInfo
  36 {
  37     ssize_t frameSize;
  38     ssize_t paddingSize;
  39     int     frameType;
  40     int     channelNo;
  41 } FrameInfo;
  42
  43 #define FRAMETYPE_I             0
  44 #define FRAMETYPE_P             1
  45 #define FRAMETYPE_B             2
  46 #define FRAMETYPE_AUDIO_MPEG1L2 4
  47 #define FRAMETYPE_AUDIO_ULAW    5
  48 #define FRAMETYPE_AUDIO_ADPCM   6
  49
  50 #define PACKET_BLOCK_SIZE   0x00000200
  51 #define PACKET_BLOCK_LAST   0x000001FF
  52 #define PACKET_BLOCK_MASK   0xFFFFFE00
  53
  54 #define MAX_PACKET_SIZE   1048576 // 1 Mb
  55
  56 #define STREAM_START_CODE_SIZE   4
  57
  58 /*
  59 // codes in MSB first
  60 static unsigned int start_code [] =
  61 {
  62     0xB0010000,         // VISUAL_OBJECT_SEQUENCE_START_CODE
  63     0xB6010000,         // VOP_START_CODE
  64     0x04C4FDFF,          // MPEG1LAYERII_START_CODE
  65     0x00000000          // end of start codes list
  66 };
  67 */
  68
  69 static int imeHeaderValid(FrameInfo *frame)
  70 {
  71     if ( frame->channelNo > 7 ||
  72          frame->frameSize > MAX_PACKET_SIZE || frame->frameSize <= 0)
  73     {
  74         mp_msg(MSGT_DEMUX, MSGL_V,
  75                "Invalid packet in LMLM4 stream: ch=%d size=%zd\n",
  76                frame->channelNo, frame->frameSize);
  77         return 0;
  78     }
  79     switch (frame->frameType) {
  80     case FRAMETYPE_I:
  81     case FRAMETYPE_P:
  82     case FRAMETYPE_B:
  83     case FRAMETYPE_AUDIO_MPEG1L2:
  84     case FRAMETYPE_AUDIO_ULAW:
  85     case FRAMETYPE_AUDIO_ADPCM:
  86         break;
  87     default:
  88         mp_msg(MSGT_DEMUX, MSGL_V, "Invalid packet in LMLM4 stream (wrong packet type %d)\n", frame->frameType);
  89         return 0;
  90     }
  91     return 1;
  92 }
  93
  94 /*
  95 int searchMPEG4Stream(demuxer_t* demuxer, IME6400Header *imeHeader)
  96 {
  97     void *data;
  98     ssize_t imeHeaderSize = sizeof(IME6400Header);
  99     ssize_t dataSize = sizeof(IME6400Header) * 3;
 100     ssize_t ptr = imeHeaderSize * 2;
 101     int errNo, startCodeNo;
 102     off_t pos;
 103
 104     data = malloc(dataSize);
 105
 106     imeHeaderSwap(imeHeader);
 107     memcpy(data + imeHeaderSize, imeHeader, imeHeaderSize);
 108
 109 //    printHex(data + imeHeaderSize, imeHeaderSize);
 110
 111     while ((errNo = stream_read(demuxer->stream, data + imeHeaderSize * 2 , imeHeaderSize)) == imeHeaderSize)
 112     {
 113 //        printHex(data + imeHeaderSize * 2, imeHeaderSize);
 114
 115         pos = stream_tell(demuxer->stream);
 116         while (dataSize - ptr >= STREAM_START_CODE_SIZE) {
 117             startCodeNo = 0;
 118             while (start_code[startCodeNo])
 119             {
 120                 if (memcmp(&start_code[startCodeNo], data + ptr, STREAM_START_CODE_SIZE) == 0) // start code match
 121                 {
 122                     memcpy(imeHeader, data + ptr - imeHeaderSize, imeHeaderSize);
 123                     imeHeaderSwap(imeHeader);
 124                     if (imeHeaderValid(imeHeader))
 125                     {
 126                         stream_seek(demuxer->stream, pos - (dataSize - ptr));
 127                         free(data);
 128                         return 0;
 129                     }
 130                 }
 131                 startCodeNo++;
 132             }
 133             ptr++;
 134         }
 135         memcpy(data,data + imeHeaderSize, imeHeaderSize * 2);
 136         ptr -= imeHeaderSize;
 137     }
 138
 139     free(data);
 140     return errNo;
 141 }
 142 */
 143
 144 static int getFrame(demuxer_t *demuxer, FrameInfo *frameInfo)
 145 {
 146     unsigned int packetSize;
 147
 148     frameInfo->channelNo = stream_read_word(demuxer->stream);
 149     frameInfo->frameType = stream_read_word(demuxer->stream);
 150     packetSize=stream_read_dword(demuxer->stream);
 151
 152     if(stream_eof(demuxer->stream)){
 153         frameInfo->frameSize = 0;
 154         return 0;
 155     }
 156
 157     frameInfo->frameSize = packetSize - 8; //sizeof(IME6400Header);
 158     frameInfo->paddingSize = (packetSize & PACKET_BLOCK_LAST) ? PACKET_BLOCK_SIZE - (packetSize & PACKET_BLOCK_LAST) : 0;
 159
 160     mp_msg(MSGT_DEMUX, MSGL_DBG2, "typ: %d chan: %d size: %zd pad: %zd\n",
 161             frameInfo->frameType,
 162             frameInfo->channelNo,
 163             frameInfo->frameSize,
 164             frameInfo->paddingSize);
 165
 166     if(!imeHeaderValid(frameInfo)){
 167         // skip this packet
 168         stream_skip(demuxer->stream,PACKET_BLOCK_SIZE-8);
 169         frameInfo->frameSize = 0;
 170         return -1;
 171     }
 172
 173     return 1;
 174 }
 175
 176 static int lmlm4_check_file(demuxer_t* demuxer)
 177 {
 178     FrameInfo frameInfo;
 179     unsigned int first;
 180
 181     mp_msg(MSGT_DEMUX, MSGL_V, "Checking for LMLM4 Stream Format\n");
 182
 183     if(getFrame(demuxer, &frameInfo)!=1){
 184         mp_msg(MSGT_DEMUX, MSGL_V, "LMLM4 Stream Format not found\n");
 185         return 0;
 186     }
 187     first=stream_read_dword(demuxer->stream);
 188     stream_skip(demuxer->stream,-12);
 189
 190     mp_msg(MSGT_DEMUXER,MSGL_V,"LMLM4: first=0x%08X\n",first);
 191
 192     switch(frameInfo.frameType){
 193     case FRAMETYPE_AUDIO_MPEG1L2:
 194         if( (first & 0xffe00000) != 0xffe00000 ){
 195             mp_msg(MSGT_DEMUXER,MSGL_V,"LMLM4: not mpeg audio\n");
 196             return 0;
 197         }
 198         if((4-((first>>17)&3))!=2){
 199             mp_msg(MSGT_DEMUXER,MSGL_V,"LMLM4: not layer-2\n");
 200             return 0;
 201         }
 202         if(((first>>10)&0x3)==3){
 203             mp_msg(MSGT_DEMUXER,MSGL_V,"LMLM4: invalid audio sampelrate\n");
 204             return 0;
 205         }
 206         mp_msg(MSGT_DEMUXER,MSGL_V,"LMLM4: first packet is audio, header checks OK!\n");
 207         break;
 208     // TODO: add checks for video header too, for case of disabled audio
 209     }
 210
 211
 212 //    stream_reset(demuxer->stream);
 213     mp_msg(MSGT_DEMUX, MSGL_V, "LMLM4 Stream Format found\n");
 214
 215     return DEMUXER_TYPE_LMLM4;
 216 }
 217
 218 static int video = 0;
 219 static int frames= 0;
 220
 221 // return value:
 222 //     0 = EOF or no stream found
 223 //     1 = successfully read a packet
 224 static int demux_lmlm4_fill_buffer(demuxer_t *demux, demux_stream_t *ds)
 225 {
 226     FrameInfo frameInfo;
 227     double pts;
 228     int id=1;
 229     int ret;
 230
 231 //hdr:
 232     demux->filepos = stream_tell(demux->stream);
 233     mp_msg(MSGT_DEMUX, MSGL_DBG2, "fpos = %"PRId64"\n", (int64_t)demux->filepos);
 234
 235     ret=getFrame(demux, &frameInfo);
 236     if(ret<=0) return ret; // EOF/error
 237
 238     pts=demux->video->sh ? frames*((sh_video_t*)(demux->video->sh))->frametime : 0;
 239
 240     switch(frameInfo.frameType){
 241     case FRAMETYPE_AUDIO_MPEG1L2:
 242         mp_dbg(MSGT_DEMUX, MSGL_DBG2, "Audio Packet\n");
 243         if (!video)
 244         {
 245             stream_skip(demux->stream, frameInfo.frameSize + frameInfo.paddingSize);
 246             mp_msg(MSGT_DEMUX, MSGL_V, "Skip Audio Packet\n");
 247             return -1; //goto hdr;
 248         }
 249         if(demux->audio->id==-1){
 250             if(!demux->a_streams[id]) new_sh_audio(demux,id);
 251             demux->audio->id=id;
 252             demux->audio->sh=demux->a_streams[id];
 253             ((sh_audio_t*)(demux->audio->sh))->format=0x50; // mpeg audio layer 1/2
 254         }
 255         if(demux->audio->id==id)
 256             ds_read_packet(demux->audio, demux->stream, frameInfo.frameSize,
 257                 pts, demux->filepos, 0);
 258         else
 259             stream_skip(demux->stream,frameInfo.frameSize);
 260         break;
 261     case FRAMETYPE_I:
 262         if (!video) {
 263             video = 1;
 264             mp_dbg(MSGT_DEMUX, MSGL_DBG2, "First Video Packet\n");
 265         }
 266     case FRAMETYPE_P:
 267         frames=(frames+1)&(1024*1024-1); // wrap around at 4 hrs to avoid inaccurate float calculations
 268         if (!video)
 269         {
 270             stream_skip(demux->stream, frameInfo.frameSize + frameInfo.paddingSize);
 271             mp_msg(MSGT_DEMUX, MSGL_V, "Skip Video P Packet\n");
 272             return -1; //goto hdr;
 273         }
 274         mp_dbg(MSGT_DEMUX, MSGL_DBG2, "Video Packet\n");
 275         if(demux->video->id==-1){
 276             if(!demux->v_streams[id]) new_sh_video(demux,id);
 277             demux->video->id=id;
 278             demux->video->sh=demux->v_streams[id];
 279             ((sh_video_t*)(demux->video->sh))->format=0x10000004; // mpeg4-ES
 280         }
 281         if(demux->video->id==id)
 282             ds_read_packet(demux->video, demux->stream, frameInfo.frameSize,
 283                 pts, demux->filepos, 0);
 284         break;
 285     default:
 286         stream_skip(demux->stream,frameInfo.frameSize);
 287     }
 288
 289     stream_skip(demux->stream, frameInfo.paddingSize);
 290
 291     return 1;
 292 }
 293
 294 static demuxer_t* demux_open_lmlm4(demuxer_t* demuxer){
 295     sh_audio_t *sh_audio=NULL;
 296     sh_video_t *sh_video=NULL;
 297
 298 #if 0
 299     sh_video_t* sh_video;
 300     sh_audio_t* sh_audio;
 301     unsigned int htype = 0, hleng;
 302     int i = 0;
 303
 304     sh_video = new_sh_video(demuxer, 0);
 305     demuxer->video->sh = sh_video;
 306     sh_video->ds = demuxer->video;
 307     sh_video->disp_w = 640;
 308     sh_video->disp_h = 480;
 309     sh_video->format = mmioFOURCC('D','I','V','X');
 310
 311     sh_video->bih = calloc(1, sizeof(*sh_video->bih));
 312
 313     /* these are false values */
 314     sh_video->bih->biSize = 40;
 315     sh_video->bih->biWidth = sh_video->disp_w;
 316     sh_video->bih->biHeight = sh_video->disp_h;
 317     sh_video->bih->biPlanes = 3;
 318     sh_video->bih->biBitCount = 16;
 319     sh_video->bih->biCompression = sh_video->format;
 320     sh_video->bih->biSizeImage = sh_video->disp_w*sh_video->disp_h;
 321
 322     sh_audio = new_sh_audio(demuxer, 0);
 323     demuxer->audio->sh = sh_audio;
 324     sh_audio->ds = demuxer->audio;
 325
 326     sh_audio->wf = calloc(1, sizeof(*sh_audio->wf));
 327
 328     sh_audio->samplerate = 48000;
 329     sh_audio->wf->wBitsPerSample = 16;
 330     sh_audio->channels = 2;
 331     sh_audio->format = 0x50;
 332     sh_audio->wf->wFormatTag = sh_audio->format;
 333     sh_audio->wf->nChannels = sh_audio->channels;
 334     sh_audio->wf->nSamplesPerSec = sh_audio->samplerate;
 335     sh_audio->wf->nAvgBytesPerSec = sh_audio->wf->nChannels*
 336     sh_audio->wf->wBitsPerSample*sh_audio->wf->nSamplesPerSec/8;
 337     sh_audio->wf->nBlockAlign = sh_audio->channels *2;
 338     sh_audio->wf->cbSize = 0;
 339
 340 #endif
 341
 342     demuxer->seekable = 0;
 343
 344     if(!ds_fill_buffer(demuxer->video)){
 345         mp_msg(MSGT_DEMUXER, MSGL_INFO, "LMLM4: %s",
 346                mp_gtext("No video stream found.\n"));
 347         demuxer->video->sh=NULL;
 348     } else {
 349         sh_video=demuxer->video->sh;sh_video->ds=demuxer->video;
 350     }
 351     if(demuxer->audio->id!=-2) {
 352         if(!ds_fill_buffer(demuxer->audio)){
 353             mp_msg(MSGT_DEMUXER, MSGL_INFO, "LMLM4: %s",
 354                    mp_gtext("No audio stream found -> no sound.\n"));
 355             demuxer->audio->sh=NULL;
 356         } else {
 357             sh_audio=demuxer->audio->sh;sh_audio->ds=demuxer->audio;
 358         }
 359     }
 360
 361     return demuxer;
 362 }
 363
 364 static void demux_close_lmlm4(demuxer_t *demuxer)
 365 {
 366 //    printf("Close LMLM4 Stream\n");
 367     return;
 368 }
 369
 370
 371 const demuxer_desc_t demuxer_desc_lmlm4 = {
 372   "LMLM4 MPEG4 Compression Card stream demuxer",
 373   "lmlm4",
 374   "RAW LMLM4",
 375   "Maxim Yevtyushkin",
 376   "",
 377   DEMUXER_TYPE_LMLM4,
 378   0, // unsafe autodetect
 379   lmlm4_check_file,
 380   demux_lmlm4_fill_buffer,
 381   demux_open_lmlm4,
 382   demux_close_lmlm4,
 383   NULL,
 384   NULL
 385 };