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| #define JPEG_INTERNALS |
| #include "jinclude.h" |
| #include "jpeglib.h" |
| #include "jdct.h" |
| #include "jsimddct.h" |
| #include "jpegcomp.h" |
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| typedef struct { |
| struct jpeg_inverse_dct pub; |
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| int cur_method[MAX_COMPONENTS]; |
| } my_idct_controller; |
| |
| typedef my_idct_controller *my_idct_ptr; |
| |
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| |
| |
| typedef union { |
| ISLOW_MULT_TYPE islow_array[DCTSIZE2]; |
| #ifdef DCT_IFAST_SUPPORTED |
| IFAST_MULT_TYPE ifast_array[DCTSIZE2]; |
| #endif |
| #ifdef DCT_FLOAT_SUPPORTED |
| FLOAT_MULT_TYPE float_array[DCTSIZE2]; |
| #endif |
| } multiplier_table; |
| |
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| |
| #ifdef DCT_ISLOW_SUPPORTED |
| #define PROVIDE_ISLOW_TABLES |
| #else |
| #ifdef IDCT_SCALING_SUPPORTED |
| #define PROVIDE_ISLOW_TABLES |
| #endif |
| #endif |
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| METHODDEF(void) |
| start_pass(j_decompress_ptr cinfo) |
| { |
| my_idct_ptr idct = (my_idct_ptr)cinfo->idct; |
| int ci, i; |
| jpeg_component_info *compptr; |
| int method = 0; |
| inverse_DCT_method_ptr method_ptr = NULL; |
| JQUANT_TBL *qtbl; |
| |
| for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; |
| ci++, compptr++) { |
| |
| switch (compptr->_DCT_scaled_size) { |
| #ifdef IDCT_SCALING_SUPPORTED |
| case 1: |
| method_ptr = jpeg_idct_1x1; |
| method = JDCT_ISLOW; |
| break; |
| case 2: |
| if (jsimd_can_idct_2x2()) |
| method_ptr = jsimd_idct_2x2; |
| else |
| method_ptr = jpeg_idct_2x2; |
| method = JDCT_ISLOW; |
| break; |
| case 3: |
| method_ptr = jpeg_idct_3x3; |
| method = JDCT_ISLOW; |
| break; |
| case 4: |
| if (jsimd_can_idct_4x4()) |
| method_ptr = jsimd_idct_4x4; |
| else |
| method_ptr = jpeg_idct_4x4; |
| method = JDCT_ISLOW; |
| break; |
| case 5: |
| method_ptr = jpeg_idct_5x5; |
| method = JDCT_ISLOW; |
| break; |
| case 6: |
| #if defined(__mips__) |
| if (jsimd_can_idct_6x6()) |
| method_ptr = jsimd_idct_6x6; |
| else |
| #endif |
| method_ptr = jpeg_idct_6x6; |
| method = JDCT_ISLOW; |
| break; |
| case 7: |
| method_ptr = jpeg_idct_7x7; |
| method = JDCT_ISLOW; |
| break; |
| #endif |
| case DCTSIZE: |
| switch (cinfo->dct_method) { |
| #ifdef DCT_ISLOW_SUPPORTED |
| case JDCT_ISLOW: |
| if (jsimd_can_idct_islow()) |
| method_ptr = jsimd_idct_islow; |
| else |
| method_ptr = jpeg_idct_islow; |
| method = JDCT_ISLOW; |
| break; |
| #endif |
| #ifdef DCT_IFAST_SUPPORTED |
| case JDCT_IFAST: |
| if (jsimd_can_idct_ifast()) |
| method_ptr = jsimd_idct_ifast; |
| else |
| method_ptr = jpeg_idct_ifast; |
| method = JDCT_IFAST; |
| break; |
| #endif |
| #ifdef DCT_FLOAT_SUPPORTED |
| case JDCT_FLOAT: |
| if (jsimd_can_idct_float()) |
| method_ptr = jsimd_idct_float; |
| else |
| method_ptr = jpeg_idct_float; |
| method = JDCT_FLOAT; |
| break; |
| #endif |
| default: |
| ERREXIT(cinfo, JERR_NOT_COMPILED); |
| break; |
| } |
| break; |
| #ifdef IDCT_SCALING_SUPPORTED |
| case 9: |
| method_ptr = jpeg_idct_9x9; |
| method = JDCT_ISLOW; |
| break; |
| case 10: |
| method_ptr = jpeg_idct_10x10; |
| method = JDCT_ISLOW; |
| break; |
| case 11: |
| method_ptr = jpeg_idct_11x11; |
| method = JDCT_ISLOW; |
| break; |
| case 12: |
| #if defined(__mips__) |
| if (jsimd_can_idct_12x12()) |
| method_ptr = jsimd_idct_12x12; |
| else |
| #endif |
| method_ptr = jpeg_idct_12x12; |
| method = JDCT_ISLOW; |
| break; |
| case 13: |
| method_ptr = jpeg_idct_13x13; |
| method = JDCT_ISLOW; |
| break; |
| case 14: |
| method_ptr = jpeg_idct_14x14; |
| method = JDCT_ISLOW; |
| break; |
| case 15: |
| method_ptr = jpeg_idct_15x15; |
| method = JDCT_ISLOW; |
| break; |
| case 16: |
| method_ptr = jpeg_idct_16x16; |
| method = JDCT_ISLOW; |
| break; |
| #endif |
| default: |
| ERREXIT1(cinfo, JERR_BAD_DCTSIZE, compptr->_DCT_scaled_size); |
| break; |
| } |
| idct->pub.inverse_DCT[ci] = method_ptr; |
| |
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| |
| if (!compptr->component_needed || idct->cur_method[ci] == method) |
| continue; |
| qtbl = compptr->quant_table; |
| if (qtbl == NULL) |
| continue; |
| idct->cur_method[ci] = method; |
| switch (method) { |
| #ifdef PROVIDE_ISLOW_TABLES |
| case JDCT_ISLOW: |
| { |
| |
| |
| |
| ISLOW_MULT_TYPE *ismtbl = (ISLOW_MULT_TYPE *)compptr->dct_table; |
| for (i = 0; i < DCTSIZE2; i++) { |
| ismtbl[i] = (ISLOW_MULT_TYPE)qtbl->quantval[i]; |
| } |
| } |
| break; |
| #endif |
| #ifdef DCT_IFAST_SUPPORTED |
| case JDCT_IFAST: |
| { |
| |
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| IFAST_MULT_TYPE *ifmtbl = (IFAST_MULT_TYPE *)compptr->dct_table; |
| #define CONST_BITS 14 |
| static const INT16 aanscales[DCTSIZE2] = { |
| |
| 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, |
| 22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270, |
| 21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906, |
| 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315, |
| 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, |
| 12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552, |
| 8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446, |
| 4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247 |
| }; |
| SHIFT_TEMPS |
| |
| for (i = 0; i < DCTSIZE2; i++) { |
| ifmtbl[i] = (IFAST_MULT_TYPE) |
| DESCALE(MULTIPLY16V16((JLONG)qtbl->quantval[i], |
| (JLONG)aanscales[i]), |
| CONST_BITS - IFAST_SCALE_BITS); |
| } |
| } |
| break; |
| #endif |
| #ifdef DCT_FLOAT_SUPPORTED |
| case JDCT_FLOAT: |
| { |
| |
| |
| |
| |
| |
| FLOAT_MULT_TYPE *fmtbl = (FLOAT_MULT_TYPE *)compptr->dct_table; |
| int row, col; |
| static const double aanscalefactor[DCTSIZE] = { |
| 1.0, 1.387039845, 1.306562965, 1.175875602, |
| 1.0, 0.785694958, 0.541196100, 0.275899379 |
| }; |
| |
| i = 0; |
| for (row = 0; row < DCTSIZE; row++) { |
| for (col = 0; col < DCTSIZE; col++) { |
| fmtbl[i] = (FLOAT_MULT_TYPE) |
| ((double)qtbl->quantval[i] * |
| aanscalefactor[row] * aanscalefactor[col]); |
| i++; |
| } |
| } |
| } |
| break; |
| #endif |
| default: |
| ERREXIT(cinfo, JERR_NOT_COMPILED); |
| break; |
| } |
| } |
| } |
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| GLOBAL(void) |
| jinit_inverse_dct(j_decompress_ptr cinfo) |
| { |
| my_idct_ptr idct; |
| int ci; |
| jpeg_component_info *compptr; |
| |
| idct = (my_idct_ptr) |
| (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE, |
| sizeof(my_idct_controller)); |
| cinfo->idct = (struct jpeg_inverse_dct *)idct; |
| idct->pub.start_pass = start_pass; |
| |
| for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; |
| ci++, compptr++) { |
| |
| compptr->dct_table = |
| (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE, |
| sizeof(multiplier_table)); |
| MEMZERO(compptr->dct_table, sizeof(multiplier_table)); |
| |
| idct->cur_method[ci] = -1; |
| } |
| } |