Exemplo n.º 1
0
/* ------------------------------------------------------------------------ */
void
decode_start_dyn(void)
{
	n_max = 286;
	maxmatch = MAXMATCH;
	init_getbits();
	start_c_dyn();
	start_p_dyn();
}
Exemplo n.º 2
0
/* lh2 */
void
decode_start_dyn( /* void */ )
{
    n_max = 286;
    maxmatch = MAXMATCH;
    init_getbits();
    init_code_cache();
    start_c_dyn();
    start_p_dyn();
}
Exemplo n.º 3
0
/* ------------------------------------------------------------------------ */
void
decode_start_fix(/*void*/)
{
    n_max = 314;
    maxmatch = 60;
    init_getbits();
    np = 1 << (12 - 6);
    start_c_dyn();
    ready_made(0);
    lha_make_table(np, pt_len, 8, pt_table);
}
Exemplo n.º 4
0
/* ------------------------------------------------------------------------ */
void decode_start_st0(void)
{
	n_max = 286;
	maxmatch = MAXMATCH;
	init_getbits();
#ifdef SUPPORT_LH7
	np = 1 << (MAX_DICBIT - 7);
#endif
#ifndef SUPPORT_LH7
	np = 1 << (MAX_DICBIT - 6);
#endif

}
Exemplo n.º 5
0
int main(int argc, char* argv[])
{
  char tmpStr[256];

  col = 0;
  verbose_level = 1;
  sequence_headers = 0;
  sequence_extensions = 0;
  user_data_bytes = 0;
  sequence_scalable_extension_present = 0;
  printf("bbVINFO - version 1.7, by Brent Beyeler ([email protected])\n");
  printf("   speed increases by, Apachez and Christian Vogelgsang\n\n");
  if (argc < 2)
  {
    printf("\nbbVINFO is an MPEG video stream analyzer\n\n");
    printf("Usage: bbVINFO  MPEG video filename  <verbose level 1..3, default = 1>\n\n");
    printf("Examples:\n");
    printf("  To list all packet start codes (excluding slice codes) to file test.txt\n");
    printf("     bbVINFO test.mpg 1 > test.txt\n\n");
    printf("  To list all packets (excluding slice packets) in detail\n");
    printf("     bbVINFO test.vob 2\n\n");
    printf("  To list all packets (including slice packets) in detail to file test.txt\n");
    printf("     bbVINFO test.mpg 3 > test.txt\n\n");
	 exit (1);
  }

  init_getbits(argv[1]);
  strcpy(tmpStr, argv[1]);
//  strlwr(tmpStr);
  if (argc > 2)
  {
    sscanf(argv[2], "%d", &verbose_level);

    if (verbose_level < 1)
      verbose_level = 1;
    if (verbose_level > 3)
      verbose_level = 3;
  }

  next_start_code();
  if (getbits(8) != SEQUENCE_HEADER_CODE)
  {
    printf("\nFile is not an MPEG Video Stream\n");
    exit(1);
  }

  next_start_code();

  if (getbits(8) != EXTENSION_START_CODE)
    mpeg2 = 0;
  else
    mpeg2 = 1;

  printf("\nFile %s is an MPEG-%d video stream\n", argv[1], mpeg2 + 1);

  finish_getbits();
  init_getbits(argv[1]);

  next_start_code();
  sequence_header();

  if (mpeg2)
    sequence_extension();

  do
  {
    extension_and_user_data(0);
    do
    {
      if (nextbits(8) == GROUP_START_CODE)
      {
        group_of_pictures_header();
        extension_and_user_data(1);
      }
      picture_header();
      if (mpeg2)
        picture_coding_extension();
      extension_and_user_data(2);
      picture_data();
    } while ((nextbits(8) == PICTURE_START_CODE) ||
             (nextbits(8) == GROUP_START_CODE));
    if (nextbits(8) != SEQUENCE_END_CODE)
    {
      sequence_header();
      if (mpeg2)
        sequence_extension();
    }
  } while (nextbits(8) != SEQUENCE_END_CODE);
  zprintf(1, "\nsequence_end_code = 0x000001%02X\n", getbits(8));

  finish_getbits();
  return (0);
}
Exemplo n.º 6
0
int main(int argc, char* argv[])
{
  char tmpStr[256];

  col = 0;
  verbose_level = 1;
  syncwords = 0;
  printf("bbAINFO - version 1.7, by Brent Beyeler ([email protected])\n");
  printf("   speed increases by, Apachez and Christian Vogelgsang\n\n");
  if (argc < 2)
  {
    printf("\nbbAINFO is an MPEG audio stream analyzer\n");
    printf("All it realy does is list the sync word headers\n\n");
    printf("Usage: bbAINFO  MPEG audio filename\n\n");
    printf("Examples:\n");
    printf("  To list all frames to file test.txt\n");
    printf("     bbAINFO test.mpg > test.txt\n\n");
	 exit (1);
  }

  init_getbits(argv[1]);
  strcpy(tmpStr, argv[1]);
//  strlwr(tmpStr);
  if (argc > 2)
  {
    sscanf(argv[2], "%d", &verbose_level);

    if (verbose_level < 1)
      verbose_level = 1;
    if (verbose_level > 3)
      verbose_level = 3;
  }

  if (nextbits(12) != SYNCWORD)
  {
    printf("\nFile is not an MPEG Audio Stream\n");
    exit(1);
  }

  do
  {
    header();
    error_check();
    audio_data();
    ancillary_data();
  } while (!end_bs());

  printf("\nFound %u sync words\n", syncwords);
  printf("\nHeader info summary:\n");
  switch (layer)
  {
    case 0:
      printf("  layer = reserved\n");
      break;
    case LAYER_1:
      printf("  layer = 1\n");
      break;
    case LAYER_2:
      printf("  layer = 2\n");
      break;
    case LAYER_3:
      printf("  layer = 3\n");
      break;
  }
  printf("  bitrate = %d Kbps\n", bitrate_index[3 - layer][bit_rate]);
  printf("  frequency = %.1f kHz\n", frequency[freq]);
  if (protection)
    printf("  error protection = disabled\n");
  else
    printf("  error protection = enabled\n");
  printf("  private flag = %d\n", private_bit);
  switch (mode)
  {
    case 0:
      printf("  mode = stereo\n");
      break;
    case 1:
	   printf("  mode = joint_stereo (intensity_stereo and/or ms_stereo)\n");
      break;
    case 2:
	   printf("  mode = dual_channel\n");
      break;
    case 3:
	   printf("  mode = single_channel\n");
  }
  if (layer == LAYER_3)
  {
    switch (mode_ext)
    {
      case 0:
        printf("  mode ext = intensity stereo is off, ms stereo is off\n");
        break;
      case 1:
        printf("  mode ext = intensity stereo is on, ms stereo is off\n");
        break;
      case 2:
        printf("  mode ext = intensity stereo is off, ms stereo is on\n");
        break;
      case 3:
        printf("  mode ext = intensity stereo is on, ms stereo is on\n");
    }
  }
  else
  {
    if (mode == 1)
    {
      switch (mode_ext)
      {
        case 0:
          printf("  mode ext = subbands  4-31 in intensity_stereo, bound==4\n");
          break;
        case 1:
          printf("  mode ext = subbands  8-31 in intensity_stereo, bound==8\n");
          break;
        case 2:
          printf("  mode ext = subbands 12-31 in intensity_stereo, bound==12\n");
          break;
        case 3:
          printf("  mode ext = subbands 16-31 in intensity_stereo, bound==16\n");
      }
    }
  }
  printf("  copyright flag = %d\n", copyright);
  printf("  original flag = %d\n", original);
  switch (emphasis)
  {
    case 0:
      printf("  emphasis = none\n");
      break;
    case 1:
      printf("  emphasis = 50/15 microsec. emphasis\n");
      break;
    case 2:
      printf("  emphasis = reserved\n");
      break;
    case 3:
      printf("  emphasis = CCITT J.17\n");
  }
  finish_getbits();
  return (0);
}
Exemplo n.º 7
0
Arquivo: larc.c Projeto: yoheie/lha
/* lzs */
void
decode_start_lzs( /*void*/ )
{
    init_getbits();
    init_code_cache();
}