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-rw-r--r--src/lib/libjpeg/jcdctmgr.c620
1 files changed, 310 insertions, 310 deletions
diff --git a/src/lib/libjpeg/jcdctmgr.c b/src/lib/libjpeg/jcdctmgr.c
index 83bea7f5f2d..def4e1d5c12 100644
--- a/src/lib/libjpeg/jcdctmgr.c
+++ b/src/lib/libjpeg/jcdctmgr.c
@@ -14,27 +14,27 @@
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
-#include "jdct.h" /* Private declarations for DCT subsystem */
+#include "jdct.h" /* Private declarations for DCT subsystem */
/* Private subobject for this module */
typedef struct {
- struct jpeg_forward_dct pub; /* public fields */
+ struct jpeg_forward_dct pub; /* public fields */
- /* Pointer to the DCT routine actually in use */
- forward_DCT_method_ptr do_dct[MAX_COMPONENTS];
+ /* Pointer to the DCT routine actually in use */
+ forward_DCT_method_ptr do_dct[MAX_COMPONENTS];
- /* The actual post-DCT divisors --- not identical to the quant table
- * entries, because of scaling (especially for an unnormalized DCT).
- * Each table is given in normal array order.
- */
- DCTELEM * divisors[NUM_QUANT_TBLS];
+ /* The actual post-DCT divisors --- not identical to the quant table
+ * entries, because of scaling (especially for an unnormalized DCT).
+ * Each table is given in normal array order.
+ */
+ DCTELEM * divisors[NUM_QUANT_TBLS];
#ifdef DCT_FLOAT_SUPPORTED
- /* Same as above for the floating-point case. */
- float_DCT_method_ptr do_float_dct[MAX_COMPONENTS];
- FAST_FLOAT * float_divisors[NUM_QUANT_TBLS];
+ /* Same as above for the floating-point case. */
+ float_DCT_method_ptr do_float_dct[MAX_COMPONENTS];
+ FAST_FLOAT * float_divisors[NUM_QUANT_TBLS];
#endif
} my_fdct_controller;
@@ -63,62 +63,62 @@ typedef my_fdct_controller * my_fdct_ptr;
METHODDEF(void)
forward_DCT (j_compress_ptr cinfo, jpeg_component_info * compptr,
- JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
- JDIMENSION start_row, JDIMENSION start_col,
- JDIMENSION num_blocks)
+ JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
+ JDIMENSION start_row, JDIMENSION start_col,
+ JDIMENSION num_blocks)
/* This version is used for integer DCT implementations. */
{
- /* This routine is heavily used, so it's worth coding it tightly. */
- my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
- forward_DCT_method_ptr do_dct = fdct->do_dct[compptr->component_index];
- DCTELEM * divisors = fdct->divisors[compptr->quant_tbl_no];
- DCTELEM workspace[DCTSIZE2]; /* work area for FDCT subroutine */
- JDIMENSION bi;
+ /* This routine is heavily used, so it's worth coding it tightly. */
+ my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
+ forward_DCT_method_ptr do_dct = fdct->do_dct[compptr->component_index];
+ DCTELEM * divisors = fdct->divisors[compptr->quant_tbl_no];
+ DCTELEM workspace[DCTSIZE2]; /* work area for FDCT subroutine */
+ JDIMENSION bi;
- sample_data += start_row; /* fold in the vertical offset once */
+ sample_data += start_row; /* fold in the vertical offset once */
- for (bi = 0; bi < num_blocks; bi++, start_col += compptr->DCT_h_scaled_size) {
- /* Perform the DCT */
- (*do_dct) (workspace, sample_data, start_col);
+ for (bi = 0; bi < num_blocks; bi++, start_col += compptr->DCT_h_scaled_size) {
+ /* Perform the DCT */
+ (*do_dct) (workspace, sample_data, start_col);
- /* Quantize/descale the coefficients, and store into coef_blocks[] */
- { register DCTELEM temp, qval;
- register int i;
- register JCOEFPTR output_ptr = coef_blocks[bi];
+ /* Quantize/descale the coefficients, and store into coef_blocks[] */
+ { register DCTELEM temp, qval;
+ register int i;
+ register JCOEFPTR output_ptr = coef_blocks[bi];
- for (i = 0; i < DCTSIZE2; i++) {
+ for (i = 0; i < DCTSIZE2; i++) {
qval = divisors[i];
temp = workspace[i];
/* Divide the coefficient value by qval, ensuring proper rounding.
- * Since C does not specify the direction of rounding for negative
- * quotients, we have to force the dividend positive for portability.
- *
- * In most files, at least half of the output values will be zero
- * (at default quantization settings, more like three-quarters...)
- * so we should ensure that this case is fast. On many machines,
- * a comparison is enough cheaper than a divide to make a special test
- * a win. Since both inputs will be nonnegative, we need only test
- * for a < b to discover whether a/b is 0.
- * If your machine's division is fast enough, define FAST_DIVIDE.
- */
+ * Since C does not specify the direction of rounding for negative
+ * quotients, we have to force the dividend positive for portability.
+ *
+ * In most files, at least half of the output values will be zero
+ * (at default quantization settings, more like three-quarters...)
+ * so we should ensure that this case is fast. On many machines,
+ * a comparison is enough cheaper than a divide to make a special test
+ * a win. Since both inputs will be nonnegative, we need only test
+ * for a < b to discover whether a/b is 0.
+ * If your machine's division is fast enough, define FAST_DIVIDE.
+ */
#ifdef FAST_DIVIDE
-#define DIVIDE_BY(a,b) a /= b
+#define DIVIDE_BY(a,b) a /= b
#else
-#define DIVIDE_BY(a,b) if (a >= b) a /= b; else a = 0
+#define DIVIDE_BY(a,b) if (a >= b) a /= b; else a = 0
#endif
if (temp < 0) {
- temp = -temp;
- temp += qval>>1; /* for rounding */
- DIVIDE_BY(temp, qval);
- temp = -temp;
+ temp = -temp;
+ temp += qval>>1; /* for rounding */
+ DIVIDE_BY(temp, qval);
+ temp = -temp;
} else {
- temp += qval>>1; /* for rounding */
- DIVIDE_BY(temp, qval);
+ temp += qval>>1; /* for rounding */
+ DIVIDE_BY(temp, qval);
}
output_ptr[i] = (JCOEF) temp;
- }
- }
- }
+ }
+ }
+ }
}
@@ -126,42 +126,42 @@ forward_DCT (j_compress_ptr cinfo, jpeg_component_info * compptr,
METHODDEF(void)
forward_DCT_float (j_compress_ptr cinfo, jpeg_component_info * compptr,
- JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
- JDIMENSION start_row, JDIMENSION start_col,
- JDIMENSION num_blocks)
+ JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
+ JDIMENSION start_row, JDIMENSION start_col,
+ JDIMENSION num_blocks)
/* This version is used for floating-point DCT implementations. */
{
- /* This routine is heavily used, so it's worth coding it tightly. */
- my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
- float_DCT_method_ptr do_dct = fdct->do_float_dct[compptr->component_index];
- FAST_FLOAT * divisors = fdct->float_divisors[compptr->quant_tbl_no];
- FAST_FLOAT workspace[DCTSIZE2]; /* work area for FDCT subroutine */
- JDIMENSION bi;
+ /* This routine is heavily used, so it's worth coding it tightly. */
+ my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
+ float_DCT_method_ptr do_dct = fdct->do_float_dct[compptr->component_index];
+ FAST_FLOAT * divisors = fdct->float_divisors[compptr->quant_tbl_no];
+ FAST_FLOAT workspace[DCTSIZE2]; /* work area for FDCT subroutine */
+ JDIMENSION bi;
- sample_data += start_row; /* fold in the vertical offset once */
+ sample_data += start_row; /* fold in the vertical offset once */
- for (bi = 0; bi < num_blocks; bi++, start_col += compptr->DCT_h_scaled_size) {
- /* Perform the DCT */
- (*do_dct) (workspace, sample_data, start_col);
+ for (bi = 0; bi < num_blocks; bi++, start_col += compptr->DCT_h_scaled_size) {
+ /* Perform the DCT */
+ (*do_dct) (workspace, sample_data, start_col);
- /* Quantize/descale the coefficients, and store into coef_blocks[] */
- { register FAST_FLOAT temp;
- register int i;
- register JCOEFPTR output_ptr = coef_blocks[bi];
+ /* Quantize/descale the coefficients, and store into coef_blocks[] */
+ { register FAST_FLOAT temp;
+ register int i;
+ register JCOEFPTR output_ptr = coef_blocks[bi];
- for (i = 0; i < DCTSIZE2; i++) {
+ for (i = 0; i < DCTSIZE2; i++) {
/* Apply the quantization and scaling factor */
temp = workspace[i] * divisors[i];
/* Round to nearest integer.
- * Since C does not specify the direction of rounding for negative
- * quotients, we have to force the dividend positive for portability.
- * The maximum coefficient size is +-16K (for 12-bit data), so this
- * code should work for either 16-bit or 32-bit ints.
- */
+ * Since C does not specify the direction of rounding for negative
+ * quotients, we have to force the dividend positive for portability.
+ * The maximum coefficient size is +-16K (for 12-bit data), so this
+ * code should work for either 16-bit or 32-bit ints.
+ */
output_ptr[i] = (JCOEF) ((int) (temp + (FAST_FLOAT) 16384.5) - 16384);
- }
- }
- }
+ }
+ }
+ }
}
#endif /* DCT_FLOAT_SUPPORTED */
@@ -179,280 +179,280 @@ forward_DCT_float (j_compress_ptr cinfo, jpeg_component_info * compptr,
METHODDEF(void)
start_pass_fdctmgr (j_compress_ptr cinfo)
{
- my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
- int ci, qtblno, i;
- jpeg_component_info *compptr;
- int method = 0;
- JQUANT_TBL * qtbl;
- DCTELEM * dtbl;
-
- for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
- ci++, compptr++) {
- /* Select the proper DCT routine for this component's scaling */
- switch ((compptr->DCT_h_scaled_size << 8) + compptr->DCT_v_scaled_size) {
+ my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
+ int ci, qtblno, i;
+ jpeg_component_info *compptr;
+ int method = 0;
+ JQUANT_TBL * qtbl;
+ DCTELEM * dtbl;
+
+ for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+ ci++, compptr++) {
+ /* Select the proper DCT routine for this component's scaling */
+ switch ((compptr->DCT_h_scaled_size << 8) + compptr->DCT_v_scaled_size) {
#ifdef DCT_SCALING_SUPPORTED
- case ((1 << 8) + 1):
- fdct->do_dct[ci] = jpeg_fdct_1x1;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((2 << 8) + 2):
- fdct->do_dct[ci] = jpeg_fdct_2x2;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((3 << 8) + 3):
- fdct->do_dct[ci] = jpeg_fdct_3x3;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((4 << 8) + 4):
- fdct->do_dct[ci] = jpeg_fdct_4x4;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((5 << 8) + 5):
- fdct->do_dct[ci] = jpeg_fdct_5x5;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((6 << 8) + 6):
- fdct->do_dct[ci] = jpeg_fdct_6x6;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((7 << 8) + 7):
- fdct->do_dct[ci] = jpeg_fdct_7x7;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((9 << 8) + 9):
- fdct->do_dct[ci] = jpeg_fdct_9x9;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((10 << 8) + 10):
- fdct->do_dct[ci] = jpeg_fdct_10x10;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((11 << 8) + 11):
- fdct->do_dct[ci] = jpeg_fdct_11x11;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((12 << 8) + 12):
- fdct->do_dct[ci] = jpeg_fdct_12x12;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((13 << 8) + 13):
- fdct->do_dct[ci] = jpeg_fdct_13x13;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((14 << 8) + 14):
- fdct->do_dct[ci] = jpeg_fdct_14x14;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((15 << 8) + 15):
- fdct->do_dct[ci] = jpeg_fdct_15x15;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((16 << 8) + 16):
- fdct->do_dct[ci] = jpeg_fdct_16x16;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((16 << 8) + 8):
- fdct->do_dct[ci] = jpeg_fdct_16x8;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((14 << 8) + 7):
- fdct->do_dct[ci] = jpeg_fdct_14x7;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((12 << 8) + 6):
- fdct->do_dct[ci] = jpeg_fdct_12x6;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((10 << 8) + 5):
- fdct->do_dct[ci] = jpeg_fdct_10x5;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((8 << 8) + 4):
- fdct->do_dct[ci] = jpeg_fdct_8x4;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((6 << 8) + 3):
- fdct->do_dct[ci] = jpeg_fdct_6x3;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((4 << 8) + 2):
- fdct->do_dct[ci] = jpeg_fdct_4x2;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((2 << 8) + 1):
- fdct->do_dct[ci] = jpeg_fdct_2x1;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((8 << 8) + 16):
- fdct->do_dct[ci] = jpeg_fdct_8x16;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((7 << 8) + 14):
- fdct->do_dct[ci] = jpeg_fdct_7x14;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((6 << 8) + 12):
- fdct->do_dct[ci] = jpeg_fdct_6x12;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((5 << 8) + 10):
- fdct->do_dct[ci] = jpeg_fdct_5x10;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((4 << 8) + 8):
- fdct->do_dct[ci] = jpeg_fdct_4x8;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((3 << 8) + 6):
- fdct->do_dct[ci] = jpeg_fdct_3x6;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((2 << 8) + 4):
- fdct->do_dct[ci] = jpeg_fdct_2x4;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
- case ((1 << 8) + 2):
- fdct->do_dct[ci] = jpeg_fdct_1x2;
- method = JDCT_ISLOW; /* jfdctint uses islow-style table */
- break;
+ case ((1 << 8) + 1):
+ fdct->do_dct[ci] = jpeg_fdct_1x1;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((2 << 8) + 2):
+ fdct->do_dct[ci] = jpeg_fdct_2x2;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((3 << 8) + 3):
+ fdct->do_dct[ci] = jpeg_fdct_3x3;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((4 << 8) + 4):
+ fdct->do_dct[ci] = jpeg_fdct_4x4;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((5 << 8) + 5):
+ fdct->do_dct[ci] = jpeg_fdct_5x5;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((6 << 8) + 6):
+ fdct->do_dct[ci] = jpeg_fdct_6x6;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((7 << 8) + 7):
+ fdct->do_dct[ci] = jpeg_fdct_7x7;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((9 << 8) + 9):
+ fdct->do_dct[ci] = jpeg_fdct_9x9;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((10 << 8) + 10):
+ fdct->do_dct[ci] = jpeg_fdct_10x10;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((11 << 8) + 11):
+ fdct->do_dct[ci] = jpeg_fdct_11x11;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((12 << 8) + 12):
+ fdct->do_dct[ci] = jpeg_fdct_12x12;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((13 << 8) + 13):
+ fdct->do_dct[ci] = jpeg_fdct_13x13;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((14 << 8) + 14):
+ fdct->do_dct[ci] = jpeg_fdct_14x14;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((15 << 8) + 15):
+ fdct->do_dct[ci] = jpeg_fdct_15x15;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((16 << 8) + 16):
+ fdct->do_dct[ci] = jpeg_fdct_16x16;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((16 << 8) + 8):
+ fdct->do_dct[ci] = jpeg_fdct_16x8;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((14 << 8) + 7):
+ fdct->do_dct[ci] = jpeg_fdct_14x7;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((12 << 8) + 6):
+ fdct->do_dct[ci] = jpeg_fdct_12x6;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((10 << 8) + 5):
+ fdct->do_dct[ci] = jpeg_fdct_10x5;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((8 << 8) + 4):
+ fdct->do_dct[ci] = jpeg_fdct_8x4;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((6 << 8) + 3):
+ fdct->do_dct[ci] = jpeg_fdct_6x3;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((4 << 8) + 2):
+ fdct->do_dct[ci] = jpeg_fdct_4x2;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((2 << 8) + 1):
+ fdct->do_dct[ci] = jpeg_fdct_2x1;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((8 << 8) + 16):
+ fdct->do_dct[ci] = jpeg_fdct_8x16;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((7 << 8) + 14):
+ fdct->do_dct[ci] = jpeg_fdct_7x14;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((6 << 8) + 12):
+ fdct->do_dct[ci] = jpeg_fdct_6x12;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((5 << 8) + 10):
+ fdct->do_dct[ci] = jpeg_fdct_5x10;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((4 << 8) + 8):
+ fdct->do_dct[ci] = jpeg_fdct_4x8;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((3 << 8) + 6):
+ fdct->do_dct[ci] = jpeg_fdct_3x6;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((2 << 8) + 4):
+ fdct->do_dct[ci] = jpeg_fdct_2x4;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
+ case ((1 << 8) + 2):
+ fdct->do_dct[ci] = jpeg_fdct_1x2;
+ method = JDCT_ISLOW; /* jfdctint uses islow-style table */
+ break;
#endif
- case ((DCTSIZE << 8) + DCTSIZE):
- switch (cinfo->dct_method) {
+ case ((DCTSIZE << 8) + DCTSIZE):
+ switch (cinfo->dct_method) {
#ifdef DCT_ISLOW_SUPPORTED
- case JDCT_ISLOW:
+ case JDCT_ISLOW:
fdct->do_dct[ci] = jpeg_fdct_islow;
method = JDCT_ISLOW;
break;
#endif
#ifdef DCT_IFAST_SUPPORTED
- case JDCT_IFAST:
+ case JDCT_IFAST:
fdct->do_dct[ci] = jpeg_fdct_ifast;
method = JDCT_IFAST;
break;
#endif
#ifdef DCT_FLOAT_SUPPORTED
- case JDCT_FLOAT:
+ case JDCT_FLOAT:
fdct->do_float_dct[ci] = jpeg_fdct_float;
method = JDCT_FLOAT;
break;
#endif
- default:
+ default:
ERREXIT(cinfo, JERR_NOT_COMPILED);
break;
- }
- break;
- default:
- ERREXIT2(cinfo, JERR_BAD_DCTSIZE,
- compptr->DCT_h_scaled_size, compptr->DCT_v_scaled_size);
- break;
- }
- qtblno = compptr->quant_tbl_no;
- /* Make sure specified quantization table is present */
- if (qtblno < 0 || qtblno >= NUM_QUANT_TBLS ||
+ }
+ break;
+ default:
+ ERREXIT2(cinfo, JERR_BAD_DCTSIZE,
+ compptr->DCT_h_scaled_size, compptr->DCT_v_scaled_size);
+ break;
+ }
+ qtblno = compptr->quant_tbl_no;
+ /* Make sure specified quantization table is present */
+ if (qtblno < 0 || qtblno >= NUM_QUANT_TBLS ||
cinfo->quant_tbl_ptrs[qtblno] == NULL)
- ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, qtblno);
- qtbl = cinfo->quant_tbl_ptrs[qtblno];
- /* Compute divisors for this quant table */
- /* We may do this more than once for same table, but it's not a big deal */
- switch (method) {
+ ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, qtblno);
+ qtbl = cinfo->quant_tbl_ptrs[qtblno];
+ /* Compute divisors for this quant table */
+ /* We may do this more than once for same table, but it's not a big deal */
+ switch (method) {
#ifdef PROVIDE_ISLOW_TABLES
- case JDCT_ISLOW:
- /* For LL&M IDCT method, divisors are equal to raw quantization
- * coefficients multiplied by 8 (to counteract scaling).
- */
- if (fdct->divisors[qtblno] == NULL) {
+ case JDCT_ISLOW:
+ /* For LL&M IDCT method, divisors are equal to raw quantization
+ * coefficients multiplied by 8 (to counteract scaling).
+ */
+ if (fdct->divisors[qtblno] == NULL) {
fdct->divisors[qtblno] = (DCTELEM *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- DCTSIZE2 * SIZEOF(DCTELEM));
- }
- dtbl = fdct->divisors[qtblno];
- for (i = 0; i < DCTSIZE2; i++) {
+ (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ DCTSIZE2 * SIZEOF(DCTELEM));
+ }
+ dtbl = fdct->divisors[qtblno];
+ for (i = 0; i < DCTSIZE2; i++) {
dtbl[i] = ((DCTELEM) qtbl->quantval[i]) << 3;
- }
- fdct->pub.forward_DCT[ci] = forward_DCT;
- break;
+ }
+ fdct->pub.forward_DCT[ci] = forward_DCT;
+ break;
#endif
#ifdef DCT_IFAST_SUPPORTED
- case JDCT_IFAST:
- {
+ case JDCT_IFAST:
+ {
/* For AA&N IDCT method, divisors are equal to quantization
- * coefficients scaled by scalefactor[row]*scalefactor[col], where
- * scalefactor[0] = 1
- * scalefactor[k] = cos(k*PI/16) * sqrt(2) for k=1..7
- * We apply a further scale factor of 8.
- */
+ * coefficients scaled by scalefactor[row]*scalefactor[col], where
+ * scalefactor[0] = 1
+ * scalefactor[k] = cos(k*PI/16) * sqrt(2) for k=1..7
+ * We apply a further scale factor of 8.
+ */
#define CONST_BITS 14
static const INT16 aanscales[DCTSIZE2] = {
- /* precomputed values scaled up by 14 bits */
- 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
+ /* precomputed values scaled up by 14 bits */
+ 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
if (fdct->divisors[qtblno] == NULL) {
- fdct->divisors[qtblno] = (DCTELEM *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ fdct->divisors[qtblno] = (DCTELEM *)
+ (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
DCTSIZE2 * SIZEOF(DCTELEM));
}
dtbl = fdct->divisors[qtblno];
for (i = 0; i < DCTSIZE2; i++) {
- dtbl[i] = (DCTELEM)
- DESCALE(MULTIPLY16V16((INT32) qtbl->quantval[i],
- (INT32) aanscales[i]),
- CONST_BITS-3);
+ dtbl[i] = (DCTELEM)
+ DESCALE(MULTIPLY16V16((INT32) qtbl->quantval[i],
+ (INT32) aanscales[i]),
+ CONST_BITS-3);
}
- }
- fdct->pub.forward_DCT[ci] = forward_DCT;
- break;
+ }
+ fdct->pub.forward_DCT[ci] = forward_DCT;
+ break;
#endif
#ifdef DCT_FLOAT_SUPPORTED
- case JDCT_FLOAT:
- {
+ case JDCT_FLOAT:
+ {
/* For float AA&N IDCT method, divisors are equal to quantization
- * coefficients scaled by scalefactor[row]*scalefactor[col], where
- * scalefactor[0] = 1
- * scalefactor[k] = cos(k*PI/16) * sqrt(2) for k=1..7
- * We apply a further scale factor of 8.
- * What's actually stored is 1/divisor so that the inner loop can
- * use a multiplication rather than a division.
- */
+ * coefficients scaled by scalefactor[row]*scalefactor[col], where
+ * scalefactor[0] = 1
+ * scalefactor[k] = cos(k*PI/16) * sqrt(2) for k=1..7
+ * We apply a further scale factor of 8.
+ * What's actually stored is 1/divisor so that the inner loop can
+ * use a multiplication rather than a division.
+ */
FAST_FLOAT * fdtbl;
int row, col;
static const double aanscalefactor[DCTSIZE] = {
- 1.0, 1.387039845, 1.306562965, 1.175875602,
- 1.0, 0.785694958, 0.541196100, 0.275899379
+ 1.0, 1.387039845, 1.306562965, 1.175875602,
+ 1.0, 0.785694958, 0.541196100, 0.275899379
};
if (fdct->float_divisors[qtblno] == NULL) {
- fdct->float_divisors[qtblno] = (FAST_FLOAT *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ fdct->float_divisors[qtblno] = (FAST_FLOAT *)
+ (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
DCTSIZE2 * SIZEOF(FAST_FLOAT));
}
fdtbl = fdct->float_divisors[qtblno];
i = 0;
for (row = 0; row < DCTSIZE; row++) {
- for (col = 0; col < DCTSIZE; col++) {
- fdtbl[i] = (FAST_FLOAT)
- (1.0 / (((double) qtbl->quantval[i] *
- aanscalefactor[row] * aanscalefactor[col] * 8.0)));
- i++;
- }
+ for (col = 0; col < DCTSIZE; col++) {
+ fdtbl[i] = (FAST_FLOAT)
+ (1.0 / (((double) qtbl->quantval[i] *
+ aanscalefactor[row] * aanscalefactor[col] * 8.0)));
+ i++;
+ }
}
- }
- fdct->pub.forward_DCT[ci] = forward_DCT_float;
- break;
+ }
+ fdct->pub.forward_DCT[ci] = forward_DCT_float;
+ break;
#endif
- default:
- ERREXIT(cinfo, JERR_NOT_COMPILED);
- break;
- }
- }
+ default:
+ ERREXIT(cinfo, JERR_NOT_COMPILED);
+ break;
+ }
+ }
}
@@ -463,20 +463,20 @@ start_pass_fdctmgr (j_compress_ptr cinfo)
GLOBAL(void)
jinit_forward_dct (j_compress_ptr cinfo)
{
- my_fdct_ptr fdct;
- int i;
+ my_fdct_ptr fdct;
+ int i;
- fdct = (my_fdct_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ fdct = (my_fdct_ptr)
+ (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_fdct_controller));
- cinfo->fdct = (struct jpeg_forward_dct *) fdct;
- fdct->pub.start_pass = start_pass_fdctmgr;
+ cinfo->fdct = (struct jpeg_forward_dct *) fdct;
+ fdct->pub.start_pass = start_pass_fdctmgr;
- /* Mark divisor tables unallocated */
- for (i = 0; i < NUM_QUANT_TBLS; i++) {
- fdct->divisors[i] = NULL;
+ /* Mark divisor tables unallocated */
+ for (i = 0; i < NUM_QUANT_TBLS; i++) {
+ fdct->divisors[i] = NULL;
#ifdef DCT_FLOAT_SUPPORTED
- fdct->float_divisors[i] = NULL;
+ fdct->float_divisors[i] = NULL;
#endif
- }
+ }
}