C++ (Cpp) default_decompress_parms Examples

Example #1

File: jdapi.c Project: Jonnyliu/Rmtsvc

GLOBAL int
jpeg_read_header (j_decompress_ptr cinfo, boolean require_image)
{
  int retcode;

  if (cinfo->global_state == DSTATE_START) {
    /* First-time actions: reset appropriate modules */
    (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
    (*cinfo->marker->reset_marker_reader) (cinfo);
    (*cinfo->src->init_source) (cinfo);
    cinfo->global_state = DSTATE_INHEADER;
  } else if (cinfo->global_state != DSTATE_INHEADER) {
    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
  }

  retcode = (*cinfo->marker->read_markers) (cinfo);

  switch (retcode) {
  case JPEG_HEADER_OK:		/* Found SOS, prepare to decompress */
    /* Set up default parameters based on header data */
    default_decompress_parms(cinfo);
    /* Set global state: ready for start_decompress */
    cinfo->global_state = DSTATE_READY;
    break;

  case JPEG_HEADER_TABLES_ONLY:	/* Found EOI before any SOS */
    if (cinfo->marker->saw_SOF)
      ERREXIT(cinfo, JERR_SOF_NO_SOS);
    if (require_image)		/* Complain if application wants an image */
      ERREXIT(cinfo, JERR_NO_IMAGE);
    /* We need not do any cleanup since only permanent storage (for DQT, DHT)
     * has been allocated.
     */
    /* Set global state: ready for a new datastream */
    cinfo->global_state = DSTATE_START;
    break;

  case JPEG_SUSPENDED:		/* Had to suspend before end of headers */
    /* no work */
    break;
  }

  return retcode;
}

Example #2

File: jdapimin.c Project: 5Quintessential/jedioutcast

GLOBAL int
jpeg_consume_input (j_decompress_ptr cinfo)
{
  int retcode = JPEG_SUSPENDED;

  /* NB: every possible DSTATE value should be listed in this switch */
  switch (cinfo->global_state) {
  case DSTATE_START:
    /* Start-of-datastream actions: reset appropriate modules */
    (*cinfo->inputctl->reset_input_controller) (cinfo);
    /* Initialize application's data source module */
    (*cinfo->src->init_source) (cinfo);
    cinfo->global_state = DSTATE_INHEADER;
    /*FALLTHROUGH*/
  case DSTATE_INHEADER:
    retcode = (*cinfo->inputctl->consume_input) (cinfo);
    if (retcode == JPEG_REACHED_SOS) { /* Found SOS, prepare to decompress */
      /* Set up default parameters based on header data */
      default_decompress_parms(cinfo);
      /* Set global state: ready for start_decompress */
      cinfo->global_state = DSTATE_READY;
    }
    break;
  case DSTATE_READY:
    /* Can't advance past first SOS until start_decompress is called */
    retcode = JPEG_REACHED_SOS;
    break;
  case DSTATE_PRELOAD:
  case DSTATE_PRESCAN:
  case DSTATE_SCANNING:
  case DSTATE_RAW_OK:
  case DSTATE_BUFIMAGE:
  case DSTATE_BUFPOST:
  case DSTATE_STOPPING:
    retcode = (*cinfo->inputctl->consume_input) (cinfo);
    break;
  default:
    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
  }
  return retcode;
}