libmpdemux/demux_lmlm4.c

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