diff --git a/sw/airborne/modules/computer_vision/lib/encoding/jpeg.c b/sw/airborne/modules/computer_vision/lib/encoding/jpeg.c index bfa375eeca..888ca7597c 100644 --- a/sw/airborne/modules/computer_vision/lib/encoding/jpeg.c +++ b/sw/airborne/modules/computer_vision/lib/encoding/jpeg.c @@ -60,7 +60,12 @@ int jpeg_create_svs_header(unsigned char *jpegbuf, int32_t size, int w) } +#define JPEG_BLOCK_SIZE 64 + + typedef struct JPEG_ENCODER_STRUCTURE { + + // Encoder uint16_t mcu_width; uint16_t mcu_height; uint16_t horizontal_mcus; @@ -81,13 +86,27 @@ typedef struct JPEG_ENCODER_STRUCTURE { int16_t ldc2; int16_t ldc3; + // Tables + uint8_t Lqt [JPEG_BLOCK_SIZE]; + uint8_t Cqt [JPEG_BLOCK_SIZE]; + uint16_t ILqt [JPEG_BLOCK_SIZE]; + uint16_t ICqt [JPEG_BLOCK_SIZE]; + + int16_t Y1 [JPEG_BLOCK_SIZE]; + int16_t Y2 [JPEG_BLOCK_SIZE]; + int16_t CB [JPEG_BLOCK_SIZE]; + int16_t CR [JPEG_BLOCK_SIZE]; + int16_t Temp [JPEG_BLOCK_SIZE]; + + uint32_t lcode; + uint16_t bitindex; + } JPEG_ENCODER_STRUCTURE; static void jpeg_initialization(JPEG_ENCODER_STRUCTURE *, uint32_t, uint32_t, uint32_t); -//static void jpeg_initialize_quantization_tables(uint32_t); -static uint8_t *jpeg_write_markers(uint8_t *, uint32_t, uint32_t, uint32_t); +static uint8_t *jpeg_write_markers(JPEG_ENCODER_STRUCTURE *, uint8_t *, uint32_t, uint32_t, uint32_t); static void jpeg_read_400_format(JPEG_ENCODER_STRUCTURE *, uint8_t *); static void jpeg_read_422_format(JPEG_ENCODER_STRUCTURE *, uint8_t *); @@ -97,35 +116,32 @@ static uint8_t *jpeg_encodeMCU(JPEG_ENCODER_STRUCTURE *, uint32_t, uint8_t *); static void jpeg_levelshift(int16_t *); static void jpeg_DCT(int16_t *); -static void jpeg_quantization(int16_t *, uint16_t *); +static void jpeg_quantization(JPEG_ENCODER_STRUCTURE *, int16_t *, uint16_t *); static uint8_t *jpeg_huffman(JPEG_ENCODER_STRUCTURE *, uint16_t, uint8_t *); -static uint8_t *jpeg_close_bitstream(uint8_t *); +static uint8_t *jpeg_close_bitstream(JPEG_ENCODER_STRUCTURE *, uint8_t *); -//static int16_t fdct_coeff[8] = {0x5a82, 0x5a82, 0x30fb, 0x7641, 0x18f8, 0x7d8a, 0x471c, 0x6a6d}; -//static int16_t fdct_temp[64]; - -static uint16_t luminance_dc_code_table [] = { +const static uint16_t luminance_dc_code_table [] = { 0x0000, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x000E, 0x001E, 0x003E, 0x007E, 0x00FE, 0x01FE }; -static uint16_t luminance_dc_size_table [] = { +const static uint16_t luminance_dc_size_table [] = { 0x0002, 0x0003, 0x0003, 0x0003, 0x0003, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009 }; -static uint16_t chrominance_dc_code_table [] = { +const static uint16_t chrominance_dc_code_table [] = { 0x0000, 0x0001, 0x0002, 0x0006, 0x000E, 0x001E, 0x003E, 0x007E, 0x00FE, 0x01FE, 0x03FE, 0x07FE }; -static uint16_t chrominance_dc_size_table [] = { +const static uint16_t chrominance_dc_size_table [] = { 0x0002, 0x0002, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000A, 0x000B }; -static uint16_t luminance_ac_code_table [] = { +const static uint16_t luminance_ac_code_table [] = { 0x000A, 0x0000, 0x0001, 0x0004, 0x000B, 0x001A, 0x0078, 0x00F8, 0x03F6, 0xFF82, 0xFF83, 0x000C, 0x001B, 0x0079, 0x01F6, 0x07F6, 0xFF84, 0xFF85, 0xFF86, 0xFF87, 0xFF88, @@ -146,7 +162,7 @@ static uint16_t luminance_ac_code_table [] = { 0x07F9 }; -static uint16_t luminance_ac_size_table [] = { +const static uint16_t luminance_ac_size_table [] = { 0x0004, 0x0002, 0x0002, 0x0003, 0x0004, 0x0005, 0x0007, 0x0008, 0x000A, 0x0010, 0x0010, 0x0004, 0x0005, 0x0007, 0x0009, 0x000B, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, @@ -167,7 +183,7 @@ static uint16_t luminance_ac_size_table [] = { 0x000B }; -static uint16_t chrominance_ac_code_table [] = { +const static uint16_t chrominance_ac_code_table [] = { 0x0000, 0x0001, 0x0004, 0x000A, 0x0018, 0x0019, 0x0038, 0x0078, 0x01F4, 0x03F6, 0x0FF4, 0x000B, 0x0039, 0x00F6, 0x01F5, 0x07F6, 0x0FF5, 0xFF88, 0xFF89, 0xFF8A, 0xFF8B, @@ -188,7 +204,7 @@ static uint16_t chrominance_ac_code_table [] = { 0x03FA }; -static uint16_t chrominance_ac_size_table [] = { +const static uint16_t chrominance_ac_size_table [] = { 0x0002, 0x0002, 0x0003, 0x0004, 0x0005, 0x0005, 0x0006, 0x0007, 0x0009, 0x000A, 0x000C, 0x0004, 0x0006, 0x0008, 0x0009, 0x000B, 0x000C, 0x0010, 0x0010, 0x0010, 0x0010, @@ -209,7 +225,7 @@ static uint16_t chrominance_ac_size_table [] = { 0x000A }; -static uint8_t bitsize [] = { +const static uint8_t bitsize [] = { 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, @@ -244,7 +260,7 @@ static uint8_t bitsize [] = { 8, 8, 8, 8, 8, 8, 8, 8 }; -static uint8_t markerdata [] = { +const static uint8_t markerdata [] = { 0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 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, 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, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, @@ -255,7 +271,7 @@ static uint8_t markerdata [] = { }; -static uint8_t zigzag_table [] = { +const static uint8_t zigzag_table [] = { 0, 1, 5, 6, 14, 15, 27, 28, 2, 4, 7, 13, 16, 26, 29, 42, 3, 8, 12, 17, 25, 30, 41, 43, @@ -265,43 +281,6 @@ static uint8_t zigzag_table [] = { 21, 34, 37, 47, 50, 56, 59, 61, 35, 36, 48, 49, 57, 58, 62, 63 }; -/*static uint8_t luminance_quant_table [] = { - 16, 11, 10, 16, 24, 40, 51, 61, - 12, 12, 14, 19, 26, 58, 60, 55, - 14, 13, 16, 24, 40, 57, 69, 56, - 14, 17, 22, 29, 51, 87, 80, 62, - 18, 22, 37, 56, 68, 109, 103, 77, - 24, 35, 55, 64, 81, 104, 113, 92, - 49, 64, 78, 87, 103, 121, 120, 101, - 72, 92, 95, 98, 112, 100, 103, 99 -}; - -static uint8_t chrominance_quant_table [] = { - 17, 18, 24, 47, 99, 99, 99, 99, - 18, 21, 26, 66, 99, 99, 99, 99, - 24, 26, 56, 99, 99, 99, 99, 99, - 47, 66, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99 -};*/ - -#define JPEG_BLOCK_SIZE 64 -static uint8_t Lqt [JPEG_BLOCK_SIZE]; -static uint8_t Cqt [JPEG_BLOCK_SIZE]; -static uint16_t ILqt [JPEG_BLOCK_SIZE]; -static uint16_t ICqt [JPEG_BLOCK_SIZE]; - -static int16_t Y1 [JPEG_BLOCK_SIZE]; -static int16_t Y2 [JPEG_BLOCK_SIZE]; -//static int16_t Y3 [JPEG_BLOCK_SIZE]; -//static int16_t Y4 [JPEG_BLOCK_SIZE]; -static int16_t CB [JPEG_BLOCK_SIZE]; -static int16_t CR [JPEG_BLOCK_SIZE]; -static int16_t Temp [JPEG_BLOCK_SIZE]; -static uint32_t lcode = 0; -static uint16_t bitindex = 0; void (*read_format)(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, uint8_t *input_ptr); @@ -310,6 +289,9 @@ static void jpeg_initialization(JPEG_ENCODER_STRUCTURE *jpeg, uint32_t image_for { uint16_t mcu_width, mcu_height, bytes_per_pixel; + jpeg->lcode = 0; + jpeg->bitindex = 0; + if (image_format == FOUR_ZERO_ZERO) { jpeg->mcu_width = mcu_width = 8; jpeg->mcu_height = mcu_height = 8; @@ -342,8 +324,9 @@ static void jpeg_initialization(JPEG_ENCODER_STRUCTURE *jpeg, uint32_t image_for jpeg->ldc1 = 0; jpeg->ldc2 = 0; jpeg->ldc3 = 0; - lcode = 0; - bitindex = 0; + + jpeg->lcode = 0; + jpeg->bitindex = 0; } ///////////////////////////////////////////////////////////// @@ -382,8 +365,8 @@ static const int jpeg_chroma_quantizer[64] = { /* * Call MakeTables with the Q factor and two u_char[64] return arrays */ -void MakeTables(int q); -void MakeTables(int q) +void MakeTables(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, int q); +void MakeTables(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, int q) { int i; int factor = q; @@ -404,14 +387,14 @@ void MakeTables(int q) /* Limit the quantizers to 1 <= q <= 255 */ if (lq < 1) { lq = 1; } else if (lq > 255) { lq = 255; } - Lqt [i] = (uint8_t) lq; - ILqt [i] = 0x8000 / lq; + jpeg_encoder_structure->Lqt [i] = (uint8_t) lq; + jpeg_encoder_structure->ILqt [i] = 0x8000 / lq; if (cq < 1) { cq = 1; } else if (cq > 255) { cq = 255; } - Cqt [i] = (uint8_t) cq; + jpeg_encoder_structure->Cqt [i] = (uint8_t) cq; //ICqt [i] = DSP_Division (0x8000, value); - ICqt [i] = 0x8000 / cq; + jpeg_encoder_structure->ICqt [i] = 0x8000 / cq; } } @@ -445,11 +428,11 @@ void jpeg_encode_image(struct image_t *in, struct image_t *out, uint32_t quality /* Quantization Table Initialization */ //jpeg_initialize_quantization_tables (quality_factor); - MakeTables(quality_factor); + MakeTables(jpeg_encoder_structure, quality_factor); /* Writing Marker Data */ if (add_dri_header) { - output_ptr = jpeg_write_markers(output_ptr, image_format, in->w, in->h); + output_ptr = jpeg_write_markers(jpeg_encoder_structure, output_ptr, image_format, in->w, in->h); } for (i = 1; i <= jpeg_encoder_structure->vertical_mcus; i++) { @@ -480,7 +463,7 @@ void jpeg_encode_image(struct image_t *in, struct image_t *out, uint32_t quality } /* Close Routine */ - output_ptr = jpeg_close_bitstream(output_ptr); + output_ptr = jpeg_close_bitstream(jpeg_encoder_structure, output_ptr); out->w = in->w; out->h = in->h; out->buf_size = output_ptr - (uint8_t *)out->buf; @@ -488,25 +471,25 @@ void jpeg_encode_image(struct image_t *in, struct image_t *out, uint32_t quality static uint8_t *jpeg_encodeMCU(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, uint32_t image_format, uint8_t *output_ptr) { - jpeg_levelshift(Y1); - jpeg_DCT(Y1); - jpeg_quantization(Y1, ILqt); + jpeg_levelshift(jpeg_encoder_structure->Y1); + jpeg_DCT(jpeg_encoder_structure->Y1); + jpeg_quantization(jpeg_encoder_structure, jpeg_encoder_structure->Y1, jpeg_encoder_structure->ILqt); output_ptr = jpeg_huffman(jpeg_encoder_structure, 1, output_ptr); if (image_format == FOUR_TWO_TWO) { - jpeg_levelshift(Y2); - jpeg_DCT(Y2); - jpeg_quantization(Y2, ILqt); + jpeg_levelshift(jpeg_encoder_structure->Y2); + jpeg_DCT(jpeg_encoder_structure->Y2); + jpeg_quantization(jpeg_encoder_structure, jpeg_encoder_structure->Y2, jpeg_encoder_structure->ILqt); output_ptr = jpeg_huffman(jpeg_encoder_structure, 1, output_ptr); - jpeg_levelshift(CB); - jpeg_DCT(CB); - jpeg_quantization(CB, ICqt); + jpeg_levelshift(jpeg_encoder_structure->CB); + jpeg_DCT(jpeg_encoder_structure->CB); + jpeg_quantization(jpeg_encoder_structure, jpeg_encoder_structure->CB, jpeg_encoder_structure->ICqt); output_ptr = jpeg_huffman(jpeg_encoder_structure, 2, output_ptr); - jpeg_levelshift(CR); - jpeg_DCT(CR); - jpeg_quantization(CR, ICqt); + jpeg_levelshift(jpeg_encoder_structure->CR); + jpeg_DCT(jpeg_encoder_structure->CR); + jpeg_quantization(jpeg_encoder_structure, jpeg_encoder_structure->CR, jpeg_encoder_structure->ICqt); output_ptr = jpeg_huffman(jpeg_encoder_structure, 3, output_ptr); } return output_ptr; @@ -613,32 +596,32 @@ static void jpeg_DCT(int16_t *data) #define PUTBITS \ { \ - bits_in_next_word = (int16_t) (bitindex + numbits - 32); \ + bits_in_next_word = (int16_t) (jpeg_encoder_structure->bitindex + numbits - 32); \ if (bits_in_next_word < 0) \ { \ - lcode = (lcode << numbits) | data; \ - bitindex += numbits; \ + jpeg_encoder_structure->lcode = (jpeg_encoder_structure->lcode << numbits) | data; \ + jpeg_encoder_structure->bitindex += numbits; \ } \ else \ { \ - lcode = (lcode << (32 - bitindex)) | (data >> bits_in_next_word); \ - if ((*output_ptr++ = (uint8_t)(lcode >> 24)) == 0xff) \ + jpeg_encoder_structure->lcode = (jpeg_encoder_structure->lcode << (32 - jpeg_encoder_structure->bitindex)) | (data >> bits_in_next_word); \ + if ((*output_ptr++ = (uint8_t)(jpeg_encoder_structure->lcode >> 24)) == 0xff) \ *output_ptr++ = 0; \ - if ((*output_ptr++ = (uint8_t)(lcode >> 16)) == 0xff) \ + if ((*output_ptr++ = (uint8_t)(jpeg_encoder_structure->lcode >> 16)) == 0xff) \ *output_ptr++ = 0; \ - if ((*output_ptr++ = (uint8_t)(lcode >> 8)) == 0xff) \ + if ((*output_ptr++ = (uint8_t)(jpeg_encoder_structure->lcode >> 8)) == 0xff) \ *output_ptr++ = 0; \ - if ((*output_ptr++ = (uint8_t) lcode) == 0xff) \ + if ((*output_ptr++ = (uint8_t) jpeg_encoder_structure->lcode) == 0xff) \ *output_ptr++ = 0; \ - lcode = data; \ - bitindex = bits_in_next_word; \ + jpeg_encoder_structure->lcode = data; \ + jpeg_encoder_structure->bitindex = bits_in_next_word; \ } \ } static uint8_t *jpeg_huffman(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, uint16_t component, uint8_t *output_ptr) { uint16_t i; - uint16_t *DcCodeTable, *DcSizeTable, *AcCodeTable, *AcSizeTable; + const uint16_t *DcCodeTable, *DcSizeTable, *AcCodeTable, *AcSizeTable; int16_t *Temp_Ptr, Coeff, LastDc; uint16_t AbsCoeff, HuffCode, HuffSize, RunLength = 0, DataSize = 0, index; @@ -647,7 +630,7 @@ static uint8_t *jpeg_huffman(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, uin uint16_t numbits; uint32_t data; - Temp_Ptr = Temp; + Temp_Ptr = jpeg_encoder_structure->Temp; Coeff = *Temp_Ptr++; if (component == 1) { @@ -732,19 +715,19 @@ static uint8_t *jpeg_huffman(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, uin } /* For bit Stuffing and EOI marker */ -static uint8_t *jpeg_close_bitstream(uint8_t *output_ptr) +static uint8_t *jpeg_close_bitstream(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, uint8_t *output_ptr) { uint16_t i, count; uint8_t *ptr; - if (bitindex > 0) { - lcode <<= (32 - bitindex); + if (jpeg_encoder_structure->bitindex > 0) { + jpeg_encoder_structure->lcode <<= (32 - jpeg_encoder_structure->bitindex); //for (i=0; i> 3; + count = (jpeg_encoder_structure->bitindex + 7) >> 3; - ptr = (uint8_t *) &lcode + 3; + ptr = (uint8_t *) &jpeg_encoder_structure->lcode + 3; for (i = 0; i < count; i++) if ((*output_ptr++ = *ptr--) == 0xff) { @@ -758,7 +741,7 @@ static uint8_t *jpeg_close_bitstream(uint8_t *output_ptr) return output_ptr; } -static uint8_t *jpeg_write_markers(uint8_t *output_ptr, uint32_t image_format, uint32_t image_width, uint32_t image_height) +static uint8_t *jpeg_write_markers(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, uint8_t *output_ptr, uint32_t image_format, uint32_t image_width, uint32_t image_height) { uint16_t i, header_length; uint8_t number_of_components; @@ -780,7 +763,7 @@ static uint8_t *jpeg_write_markers(uint8_t *output_ptr, uint32_t image_format, u // Lqt table for (i = 0; i < 64; i++) { - *output_ptr++ = Lqt [i]; + *output_ptr++ = jpeg_encoder_structure->Lqt [i]; } // Quantization table marker @@ -796,7 +779,7 @@ static uint8_t *jpeg_write_markers(uint8_t *output_ptr, uint32_t image_format, u // Cqt table for (i = 0; i < 64; i++) { - *output_ptr++ = Cqt [i]; + *output_ptr++ = jpeg_encoder_structure->Cqt [i]; } if (image_format == FOUR_ZERO_ZERO) { @@ -946,7 +929,7 @@ static uint8_t *jpeg_write_markers(uint8_t *output_ptr, uint32_t image_format, u }*/ /* multiply DCT Coefficients with Quantization table and store in ZigZag location */ -static void jpeg_quantization(int16_t *const data, uint16_t *const quant_table_ptr) +static void jpeg_quantization(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, int16_t *const data, uint16_t *const quant_table_ptr) { int16_t i; int32_t value; @@ -955,14 +938,14 @@ static void jpeg_quantization(int16_t *const data, uint16_t *const quant_table_p value = data [i] * quant_table_ptr [i]; value = (value + 0x4000) >> 15; - Temp [zigzag_table [i]] = (int16_t) value; + jpeg_encoder_structure->Temp [zigzag_table [i]] = (int16_t) value; } } static void jpeg_read_400_format(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, uint8_t *input_ptr) { int32_t i, j; - int16_t *Y1_Ptr = Y1; + int16_t *Y1_Ptr = jpeg_encoder_structure->Y1; uint16_t rows = jpeg_encoder_structure->rows; uint16_t cols = jpeg_encoder_structure->cols; @@ -994,10 +977,10 @@ static void jpeg_read_422_format(JPEG_ENCODER_STRUCTURE *jpeg_encoder_structure, int32_t i, j; uint16_t Y1_cols, Y2_cols; - int16_t *Y1_Ptr = Y1; - int16_t *Y2_Ptr = Y2; - int16_t *CB_Ptr = CB; - int16_t *CR_Ptr = CR; + int16_t *Y1_Ptr = jpeg_encoder_structure->Y1; + int16_t *Y2_Ptr = jpeg_encoder_structure->Y2; + int16_t *CB_Ptr = jpeg_encoder_structure->CB; + int16_t *CR_Ptr = jpeg_encoder_structure->CR; uint16_t rows = jpeg_encoder_structure->rows; uint16_t cols = jpeg_encoder_structure->cols;