jcparam.c

来自「JPEG Image compression using IJG standar」· C语言 代码 · 共 848 行 · 第 1/3 页

      0x08, 0x09, 0x0a, 0x13, 0x12, 0x14, 0x11, 0x15, 
      0x16, 0x17, 0x23, 0x22, 0x24, 0x21, 0x25, 0x26,
      0x33, 0x32, 0x34, 0x31, 0x35, 0x18, 0x19, 0x0b, 
	  0x0c, 0x0d, 0x0e, 0x0f, 0x1a, 0x1b, 0x1c, 0x1d,
	  0x1e, 0x1f, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c,
	  0x2d, 0x2e, 0x2f, 0x36, 0x37, 0x38, 
	  0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 
	  0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 
	  0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
	  0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 
	  0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
	  0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 
	  0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0xf0
	};
*/

/*
  These tables are designed for the binDCT coef generated by the
  unnormalized Harr, according to Trac's paper.

  static const UINT8 bits_dc_luminance_lossless[17] =
    { 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0 };
  static const UINT8 val_dc_luminance_lossless[] =
    { 7, 9, 8, 10, 6, 5, 11, 4, 3, 2, 1, 0, 12, 13, 14, 15};

  static const UINT8 bits_dc_chrominance_lossless[17] =
    { 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0 };
  static const UINT8 val_dc_chrominance_lossless[] =
    { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };

  //These tbles are designed for unnormalized butterflies.
  static const UINT8 bits_ac_luminance_lossless[17] =
  { 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 114};

  static const UINT8 val_ac_luminance_lossless[] =
    { 0x02, 0x01, 0x03, 0x00, 0x04, 0x05, 0x06, 0x12,
      0x11, 0x13, 0x07, 0x14, 0x08, 0x21, 0x22, 0x09, 
      0x23, 0x15, 0x0a, 0x31, 0x32, 0x24, 0x16, 0x33, 
	  0x17, 0x41, 0x42, 0x34, 0x25, 0x0b, 0x18, 0xf0,
	  0x43, 0x51, 0x52, 0x26, 0x53, 0x44, 0x35, 0x62, 
	  0x61, 0x63, 0x54, 0x45, 0x19, 0x71, 0x72, 0x27, 
	  0x36, 0x73, 0x81, 0x82, 0x91, 0x92, 0x55, 
	  0xa1, 0xa2, 0xb1, 0xb2, 0xc1, 0xc2, 
	  0x0c, 0x0d, 0x1a, 0x1b, 0x28, 0x29, 0x37, 0x38,
	  0x46, 0x47, 0x56, 0x57, 0x64, 0x65, 0x74, 0x75,
	  0x84, 0x85, 0x93, 0x94, 0xa3, 0xa4, 0xb3, 0xb4, 
	  0xc3, 0xc4, 
	  0x0e, 0x0f, 0x1c, 0x1d, 0x1e, 0x1f, 0x2a, 0x2b, 
	  0x2c, 0x2d, 0x2e, 0x2f, 0x39, 0x3a, 0x3b, 0x3c, 
	  0x3d, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x58, 0x59, 
	  0x5a, 0x5b, 0x5c, 0x66, 0x67, 0x68, 0x69, 0x6a, 
	  0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x86, 0x87, 
	  0x88, 0x89, 0x95, 0x96, 0x97, 0x98, 0xa5, 0xa6, 
	  0xb5, 0xb6, 0xc5, 0xc6, 0xd1, 0xd2, 0xd3, 0xd4, 
	  0xe1, 0xe2, 0xe3, 0xe4, 0xf1, 0xf2, 0xf3, 0xf4
	};
	    	    	    
  static const UINT8 bits_ac_chrominance_lossless[17] =
    { 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
  static const UINT8 val_ac_chrominance_lossless[] =
    { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
      0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
      0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
      0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
      0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
      0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
      0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
      0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
      0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
      0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
      0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
      0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
      0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
      0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
      0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
      0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
      0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
      0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
      0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
      0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
      0xf9, 0xfa };
*/

  //New Huff table, after optimizing the unnormalized Harr.

  static const UINT8 bits_dc_luminance_lossless[17] =
    { 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0 };
  static const UINT8 val_dc_luminance_lossless[] =
	{ 3, 4, 2, 5, 6, 1, 7, 0, 8, 9, 10, 11, 12, 13, 14, 15};

  static const UINT8 bits_dc_chrominance_lossless[17] =
    { 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0 };
  static const UINT8 val_dc_chrominance_lossless[] =
    { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };

  //These tbles are designed for unnormalized butterflies.
  static const UINT8 bits_ac_luminance_lossless[17] =
  { 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 109};

  /*
  static const UINT8 val_ac_luminance_lossless[] =
    { 0x02, 0x01, 0x03, 0x04, 0x05, 0x12, 0x11,
      0x13, 0x06, 0x14, 0x00, 0x07, 0x22, 0x21, 0x15, 0x23, 
	  0x24, 0x08, 0x16, 0x32, 0x31, 0x33, 0x34, 0x25,
	  0x17, 0x42, 0x41, 0x35, 0x43, 0x26, 0x51, 
	  0x44, 0x53, 0x52, 0x09, 0x61, 0x45, 0x36, 0x18,
	  0x64, 0x73, 0x27, 0x37, 0x0a, 0xf0,
	  0x19, 0x28, 0x38, 0x46, 0x54, 0x62, 0x63, 0x71, 
	  0x72, 0x81, 0x91, 0x82, 0x92, 0x0b, 0x1a, 0x29, 
	  0x39, 0x47, 0x55, 0x65, 0x74,
	  0x0c, 0x0d, 0x1b, 0x1c, 0x2a, 0x2b, 0x3a, 0x3b,
	  0x48, 0x49, 0x4a, 0x56, 0x57, 0x58, 0x66, 0x67,
	  0x68, 0x75, 0x76, 0x77, 0x78, 0x83, 0x84, 0x85,
	  0x86, 0x87, 0x88, 0x93, 0x94, 0x95, 0x96, 0x97, 
	  0x98, 0xa1, 0xa2, 0xb1, 0xb2, 0xc1, 0xc2, 0xa3, 
	  0xa4, 0xb3, 0xb4, 0xc3, 0xc4,   
	  0x0e, 0x0f, 0x1d, 0x1e, 0x1f, 0x2c, 0x2d, 0x3c, 
	  0x3d, 0x4b, 0x4c, 0x59, 0x69, 0x89, 0x8a, 0x99, 
	  0x9a, 0xa5, 0xa6, 0xb5, 0xb6, 0xc5, 
	  0xc6, 0xd1, 0xd2, 0xd3, 0xd4, 0xe1, 0xe2, 0xe3, 
	  0xe4, 0xf1, 0xf2, 0xf3, 0xf4
	};
  */

  static const UINT8 val_ac_luminance_lossless[] =
    { 0x02, 0x01, 0x03, 0x04, 0x05, 0x12, 0x11, 0x13, 
	  0x06, 0x14, 0x00, 0x07, 0x22, 0x21, 0x15, 0x23, 
	  0x24, 0x08, 0x16, 0x32, 0x31, 0x33, 0x34, 0x25,
	  0x17, 0x42, 0x41, 0x43, 0x35, 0x51, 0x26, 0x44,
	  0x09, 0x52, 0x18, 0x36, 0x45, 0x53, 0x62, 0x61, 0x46,
	  0x0a, 0x27, 0x19, 0x54, 0x1a, 0x55, 0x64, 0x73, 
	  0x37, 0xf0, 0x28, 0x38, 0x63, 0x71, 

	  0x72, 0x81, 0x91, 0x82, 0x92, 0x0b, 0x29, 
	  0x39, 0x47, 0x65, 0x74,
	  0x0c, 0x0d, 0x1b, 0x1c, 0x2a, 0x2b, 0x3a, 0x3b,
	  0x48, 0x49, 0x4a, 0x56, 0x57, 0x58, 0x66, 0x67,
	  0x68, 0x75, 0x76, 0x77, 0x78, 0x83, 0x84, 0x85,
	  0x86, 0x87, 0x88, 0x93, 0x94, 0x95, 0x96, 0x97, 
	  0x98, 0xa1, 0xa2, 0xb1, 0xb2, 0xc1, 0xc2, 0xa3, 
	  0xa4, 0xb3, 0xb4, 0xc3, 0xc4,   
	  0x0e, 0x0f, 0x1d, 0x1e, 0x1f, 0x2c, 0x2d, 0x3c, 
	  0x3d, 0x4b, 0x4c, 0x59, 0x69, 0x89, 0x8a, 0x99, 
	  0x9a, 0xa5, 0xa6, 0xb5, 0xb6, 0xc5, 
	  0xc6, 0xd1, 0xd2, 0xd3, 0xd4, 0xe1, 0xe2, 0xe3, 
	  0xe4, 0xf1, 0xf2, 0xf3, 0xf4
	};

  static const UINT8 bits_ac_chrominance_lossless[17] =
    { 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
  static const UINT8 val_ac_chrominance_lossless[] =
    { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
      0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
      0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
      0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
      0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
      0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
      0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
      0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
      0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
      0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
      0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
      0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
      0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
      0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
      0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
      0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
      0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
      0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
      0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
      0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
      0xf9, 0xfa };


//******************************************************	    

  if ( has_losslessBinDCT_switches() ) {

	// use new Huff table for lossless binDCT.
    add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[0],
		 bits_dc_luminance_lossless, val_dc_luminance_lossless);
	
    add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[0],
		 bits_ac_luminance_lossless, val_ac_luminance_lossless);

	add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[1],
		 bits_dc_chrominance_lossless, val_dc_chrominance_lossless);
	add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[1],
		 bits_ac_chrominance_lossless, val_ac_chrominance_lossless);  

  } else {

    add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[0],
		 bits_dc_luminance, val_dc_luminance);

	add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[0],
		 bits_ac_luminance, val_ac_luminance);

	add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[1],
		 bits_dc_chrominance, val_dc_chrominance);
	add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[1],
		 bits_ac_chrominance, val_ac_chrominance);  
  }




}
  

/*
 * Default parameter setup for compression.
 *
 * Applications that don't choose to use this routine must do their
 * own setup of all these parameters.  Alternately, you can call this
 * to establish defaults and then alter parameters selectively.  This
 * is the recommended approach since, if we add any new parameters,
 * your code will still work (they'll be set to reasonable defaults).
 */

GLOBAL(void)
jpeg_set_defaults (j_compress_ptr cinfo)
{
  int i;

  /* Safety check to ensure start_compress not called yet. */
  if (cinfo->global_state != CSTATE_START)
    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);

  /* Allocate comp_info array large enough for maximum component count.
   * Array is made permanent in case application wants to compress
   * multiple images at same param settings.
   */
  if (cinfo->comp_info == NULL)
    cinfo->comp_info = (jpeg_component_info *)
      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
				  MAX_COMPONENTS * SIZEOF(jpeg_component_info));

  /* Initialize everything not dependent on the color space */

  cinfo->data_precision = BITS_IN_JSAMPLE;
  /* Set up two quantization tables using default quality of 75 */
  jpeg_set_quality(cinfo, 75, TRUE);
  /* Set up two Huffman tables */
  std_huff_tables(cinfo);

  /* Initialize default arithmetic coding conditioning */
  for (i = 0; i < NUM_ARITH_TBLS; i++) {
    cinfo->arith_dc_L[i] = 0;
    cinfo->arith_dc_U[i] = 1;
    cinfo->arith_ac_K[i] = 5;
  }

  /* Default is no multiple-scan output */
  cinfo->scan_info = NULL;
  cinfo->num_scans = 0;

  /* Expect normal source image, not raw downsampled data */
  cinfo->raw_data_in = FALSE;

  /* Use Huffman coding, not arithmetic coding, by default */
  cinfo->arith_code = FALSE;

  /* By default, don't do extra passes to optimize entropy coding */
  cinfo->optimize_coding = FALSE;
  /* The standard Huffman tables are only valid for 8-bit data precision.
   * If the precision is higher, force optimization on so that usable
   * tables will be computed.  This test can be removed if default tables
   * are supplied that are valid for the desired precision.
   */
  if (cinfo->data_precision > 8)
    cinfo->optimize_coding = TRUE;

  /* By default, use the simpler non-cosited sampling alignment */
  cinfo->CCIR601_sampling = FALSE;

  /* No input smoothing */
  cinfo->smoothing_factor = 0;

  /* DCT algorithm preference */
  cinfo->dct_method = JDCT_DEFAULT;

  /* No restart markers */