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![Klemens Friedl](/assets/img/avatar_default.png)
* sumatrapdf - vendor import * everything compiles (libjpeg, poppler, fitz, sumatrapdf) * does NOT link (remove the comment tags in the parent directory.rbuild file (rosapps dir) to build it) svn path=/trunk/; revision=29295
964 lines
31 KiB
C
964 lines
31 KiB
C
/*
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* jidctint.c
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*
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* Copyright (C) 1991-1998, Thomas G. Lane.
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* This file is part of the Independent JPEG Group's software.
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* For conditions of distribution and use, see the accompanying README file.
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*
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* This file contains a slow-but-accurate integer implementation of the
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* inverse DCT (Discrete Cosine Transform). In the IJG code, this routine
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* must also perform dequantization of the input coefficients.
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*
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* A 2-D IDCT can be done by 1-D IDCT on each column followed by 1-D IDCT
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* on each row (or vice versa, but it's more convenient to emit a row at
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* a time). Direct algorithms are also available, but they are much more
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* complex and seem not to be any faster when reduced to code.
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*
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* This implementation is based on an algorithm described in
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* C. Loeffler, A. Ligtenberg and G. Moschytz, "Practical Fast 1-D DCT
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* Algorithms with 11 Multiplications", Proc. Int'l. Conf. on Acoustics,
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* Speech, and Signal Processing 1989 (ICASSP '89), pp. 988-991.
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* The primary algorithm described there uses 11 multiplies and 29 adds.
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* We use their alternate method with 12 multiplies and 32 adds.
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* The advantage of this method is that no data path contains more than one
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* multiplication; this allows a very simple and accurate implementation in
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* scaled fixed-point arithmetic, with a minimal number of shifts.
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*/
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#define JPEG_INTERNALS
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#include "jinclude.h"
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#include "jpeglib.h"
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#include "jdct.h" /* Private declarations for DCT subsystem */
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#ifdef DCT_ISLOW_SUPPORTED
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/*
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* This module is specialized to the case DCTSIZE = 8.
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*/
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#if DCTSIZE != 8
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Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
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#endif
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/*
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* The poop on this scaling stuff is as follows:
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*
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* Each 1-D IDCT step produces outputs which are a factor of sqrt(N)
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* larger than the true IDCT outputs. The final outputs are therefore
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* a factor of N larger than desired; since N=8 this can be cured by
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* a simple right shift at the end of the algorithm. The advantage of
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* this arrangement is that we save two multiplications per 1-D IDCT,
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* because the y0 and y4 inputs need not be divided by sqrt(N).
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*
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* We have to do addition and subtraction of the integer inputs, which
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* is no problem, and multiplication by fractional constants, which is
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* a problem to do in integer arithmetic. We multiply all the constants
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* by CONST_SCALE and convert them to integer constants (thus retaining
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* CONST_BITS bits of precision in the constants). After doing a
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* multiplication we have to divide the product by CONST_SCALE, with proper
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* rounding, to produce the correct output. This division can be done
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* cheaply as a right shift of CONST_BITS bits. We postpone shifting
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* as long as possible so that partial sums can be added together with
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* full fractional precision.
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*
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* The outputs of the first pass are scaled up by PASS1_BITS bits so that
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* they are represented to better-than-integral precision. These outputs
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* require BITS_IN_JSAMPLE + PASS1_BITS + 3 bits; this fits in a 16-bit word
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* with the recommended scaling. (To scale up 12-bit sample data further, an
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* intermediate INT32 array would be needed.)
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*
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* To avoid overflow of the 32-bit intermediate results in pass 2, we must
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* have BITS_IN_JSAMPLE + CONST_BITS + PASS1_BITS <= 26. Error analysis
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* shows that the values given below are the most effective.
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*/
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#if BITS_IN_JSAMPLE == 8
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#define CONST_BITS 13
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#define PASS1_BITS 2
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#else
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#define CONST_BITS 13
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#define PASS1_BITS 1 /* lose a little precision to avoid overflow */
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#endif
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/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
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* causing a lot of useless floating-point operations at run time.
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* To get around this we use the following pre-calculated constants.
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* If you change CONST_BITS you may want to add appropriate values.
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* (With a reasonable C compiler, you can just rely on the FIX() macro...)
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*/
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#if CONST_BITS == 13
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#define FIX_0_298631336 ((INT32) 2446) /* FIX(0.298631336) */
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#define FIX_0_390180644 ((INT32) 3196) /* FIX(0.390180644) */
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#define FIX_0_541196100 ((INT32) 4433) /* FIX(0.541196100) */
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#define FIX_0_765366865 ((INT32) 6270) /* FIX(0.765366865) */
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#define FIX_0_899976223 ((INT32) 7373) /* FIX(0.899976223) */
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#define FIX_1_175875602 ((INT32) 9633) /* FIX(1.175875602) */
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#define FIX_1_501321110 ((INT32) 12299) /* FIX(1.501321110) */
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#define FIX_1_847759065 ((INT32) 15137) /* FIX(1.847759065) */
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#define FIX_1_961570560 ((INT32) 16069) /* FIX(1.961570560) */
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#define FIX_2_053119869 ((INT32) 16819) /* FIX(2.053119869) */
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#define FIX_2_562915447 ((INT32) 20995) /* FIX(2.562915447) */
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#define FIX_3_072711026 ((INT32) 25172) /* FIX(3.072711026) */
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#else
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#define FIX_0_298631336 FIX(0.298631336)
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#define FIX_0_390180644 FIX(0.390180644)
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#define FIX_0_541196100 FIX(0.541196100)
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#define FIX_0_765366865 FIX(0.765366865)
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#define FIX_0_899976223 FIX(0.899976223)
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#define FIX_1_175875602 FIX(1.175875602)
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#define FIX_1_501321110 FIX(1.501321110)
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#define FIX_1_847759065 FIX(1.847759065)
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#define FIX_1_961570560 FIX(1.961570560)
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#define FIX_2_053119869 FIX(2.053119869)
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#define FIX_2_562915447 FIX(2.562915447)
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#define FIX_3_072711026 FIX(3.072711026)
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#endif
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/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
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* For 8-bit samples with the recommended scaling, all the variable
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* and constant values involved are no more than 16 bits wide, so a
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* 16x16->32 bit multiply can be used instead of a full 32x32 multiply.
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* For 12-bit samples, a full 32-bit multiplication will be needed.
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*/
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#if BITS_IN_JSAMPLE == 8
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#define MULTIPLY(var,const) MULTIPLY16C16(var,const)
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#else
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#define MULTIPLY(var,const) ((var) * (const))
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#endif
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/* Dequantize a coefficient by multiplying it by the multiplier-table
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* entry; produce an int result. In this module, both inputs and result
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* are 16 bits or less, so either int or short multiply will work.
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*/
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#define DEQUANTIZE(coef,quantval) (((ISLOW_MULT_TYPE) (coef)) * (quantval))
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/*
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* Perform dequantization and inverse DCT on one block of coefficients.
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*/
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GLOBAL(void)
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jpeg_idct_islow (j_decompress_ptr cinfo, jpeg_component_info * compptr,
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JCOEFPTR coef_block,
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JSAMPARRAY output_buf, JDIMENSION output_col)
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{
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INT32 tmp0, tmp1, tmp2, tmp3;
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INT32 tmp10, tmp11, tmp12, tmp13;
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INT32 z1, z2, z3, z4, z5;
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JCOEFPTR inptr;
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ISLOW_MULT_TYPE * quantptr;
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int * wsptr;
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JSAMPROW outptr;
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JSAMPLE *range_limit = IDCT_range_limit(cinfo);
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int ctr;
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int workspace[DCTSIZE2]; /* buffers data between passes */
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SHIFT_TEMPS
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/* Pass 1: process columns from input, store into work array. */
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/* Note results are scaled up by sqrt(8) compared to a true IDCT; */
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/* furthermore, we scale the results by 2**PASS1_BITS. */
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inptr = coef_block;
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quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
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wsptr = workspace;
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for (ctr = DCTSIZE; ctr > 0; ctr--) {
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/* Due to quantization, we will usually find that many of the input
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* coefficients are zero, especially the AC terms. We can exploit this
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* by short-circuiting the IDCT calculation for any column in which all
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* the AC terms are zero. In that case each output is equal to the
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* DC coefficient (with scale factor as needed).
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* With typical images and quantization tables, half or more of the
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* column DCT calculations can be simplified this way.
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*/
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if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
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inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*4] == 0 &&
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inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*6] == 0 &&
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inptr[DCTSIZE*7] == 0) {
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/* AC terms all zero */
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int dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]) << PASS1_BITS;
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wsptr[DCTSIZE*0] = dcval;
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wsptr[DCTSIZE*1] = dcval;
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wsptr[DCTSIZE*2] = dcval;
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wsptr[DCTSIZE*3] = dcval;
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wsptr[DCTSIZE*4] = dcval;
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wsptr[DCTSIZE*5] = dcval;
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wsptr[DCTSIZE*6] = dcval;
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wsptr[DCTSIZE*7] = dcval;
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inptr++; /* advance pointers to next column */
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quantptr++;
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wsptr++;
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continue;
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}
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/* Even part: reverse the even part of the forward DCT. */
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/* The rotator is sqrt(2)*c(-6). */
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z2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
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z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
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z1 = MULTIPLY(z2 + z3, FIX_0_541196100);
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tmp2 = z1 + MULTIPLY(z3, - FIX_1_847759065);
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tmp3 = z1 + MULTIPLY(z2, FIX_0_765366865);
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z2 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
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z3 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
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tmp0 = (z2 + z3) << CONST_BITS;
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tmp1 = (z2 - z3) << CONST_BITS;
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tmp10 = tmp0 + tmp3;
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tmp13 = tmp0 - tmp3;
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tmp11 = tmp1 + tmp2;
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tmp12 = tmp1 - tmp2;
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/* Odd part per figure 8; the matrix is unitary and hence its
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* transpose is its inverse. i0..i3 are y7,y5,y3,y1 respectively.
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*/
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tmp0 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
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tmp1 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
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tmp2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
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tmp3 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
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z1 = tmp0 + tmp3;
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z2 = tmp1 + tmp2;
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z3 = tmp0 + tmp2;
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z4 = tmp1 + tmp3;
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z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
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tmp0 = MULTIPLY(tmp0, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
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tmp1 = MULTIPLY(tmp1, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
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tmp2 = MULTIPLY(tmp2, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
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tmp3 = MULTIPLY(tmp3, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
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z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
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z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
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z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
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z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
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z3 += z5;
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z4 += z5;
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tmp0 += z1 + z3;
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tmp1 += z2 + z4;
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tmp2 += z2 + z3;
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tmp3 += z1 + z4;
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/* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */
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wsptr[DCTSIZE*0] = (int) DESCALE(tmp10 + tmp3, CONST_BITS-PASS1_BITS);
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wsptr[DCTSIZE*7] = (int) DESCALE(tmp10 - tmp3, CONST_BITS-PASS1_BITS);
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wsptr[DCTSIZE*1] = (int) DESCALE(tmp11 + tmp2, CONST_BITS-PASS1_BITS);
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wsptr[DCTSIZE*6] = (int) DESCALE(tmp11 - tmp2, CONST_BITS-PASS1_BITS);
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wsptr[DCTSIZE*2] = (int) DESCALE(tmp12 + tmp1, CONST_BITS-PASS1_BITS);
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wsptr[DCTSIZE*5] = (int) DESCALE(tmp12 - tmp1, CONST_BITS-PASS1_BITS);
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wsptr[DCTSIZE*3] = (int) DESCALE(tmp13 + tmp0, CONST_BITS-PASS1_BITS);
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wsptr[DCTSIZE*4] = (int) DESCALE(tmp13 - tmp0, CONST_BITS-PASS1_BITS);
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inptr++; /* advance pointers to next column */
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quantptr++;
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wsptr++;
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}
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/* Pass 2: process rows from work array, store into output array. */
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/* Note that we must descale the results by a factor of 8 == 2**3, */
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/* and also undo the PASS1_BITS scaling. */
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wsptr = workspace;
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for (ctr = 0; ctr < DCTSIZE; ctr++) {
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outptr = output_buf[ctr] + output_col;
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/* Rows of zeroes can be exploited in the same way as we did with columns.
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* However, the column calculation has created many nonzero AC terms, so
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* the simplification applies less often (typically 5% to 10% of the time).
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* On machines with very fast multiplication, it's possible that the
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* test takes more time than it's worth. In that case this section
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* may be commented out.
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*/
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#ifndef NO_ZERO_ROW_TEST
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if (wsptr[1] == 0 && wsptr[2] == 0 && wsptr[3] == 0 && wsptr[4] == 0 &&
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wsptr[5] == 0 && wsptr[6] == 0 && wsptr[7] == 0) {
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/* AC terms all zero */
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JSAMPLE dcval = range_limit[(int) DESCALE((INT32) wsptr[0], PASS1_BITS+3)
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& RANGE_MASK];
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outptr[0] = dcval;
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outptr[1] = dcval;
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outptr[2] = dcval;
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outptr[3] = dcval;
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outptr[4] = dcval;
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outptr[5] = dcval;
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outptr[6] = dcval;
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outptr[7] = dcval;
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wsptr += DCTSIZE; /* advance pointer to next row */
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continue;
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}
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#endif
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/* Even part: reverse the even part of the forward DCT. */
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/* The rotator is sqrt(2)*c(-6). */
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z2 = (INT32) wsptr[2];
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z3 = (INT32) wsptr[6];
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z1 = MULTIPLY(z2 + z3, FIX_0_541196100);
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tmp2 = z1 + MULTIPLY(z3, - FIX_1_847759065);
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tmp3 = z1 + MULTIPLY(z2, FIX_0_765366865);
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tmp0 = ((INT32) wsptr[0] + (INT32) wsptr[4]) << CONST_BITS;
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tmp1 = ((INT32) wsptr[0] - (INT32) wsptr[4]) << CONST_BITS;
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tmp10 = tmp0 + tmp3;
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tmp13 = tmp0 - tmp3;
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tmp11 = tmp1 + tmp2;
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tmp12 = tmp1 - tmp2;
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/* Odd part per figure 8; the matrix is unitary and hence its
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* transpose is its inverse. i0..i3 are y7,y5,y3,y1 respectively.
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*/
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tmp0 = (INT32) wsptr[7];
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tmp1 = (INT32) wsptr[5];
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tmp2 = (INT32) wsptr[3];
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tmp3 = (INT32) wsptr[1];
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z1 = tmp0 + tmp3;
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z2 = tmp1 + tmp2;
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z3 = tmp0 + tmp2;
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z4 = tmp1 + tmp3;
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z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
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tmp0 = MULTIPLY(tmp0, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
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tmp1 = MULTIPLY(tmp1, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
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tmp2 = MULTIPLY(tmp2, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
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tmp3 = MULTIPLY(tmp3, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
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z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
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z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
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z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
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z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
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z3 += z5;
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z4 += z5;
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tmp0 += z1 + z3;
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tmp1 += z2 + z4;
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tmp2 += z2 + z3;
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tmp3 += z1 + z4;
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/* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */
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outptr[0] = range_limit[(int) DESCALE(tmp10 + tmp3,
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CONST_BITS+PASS1_BITS+3)
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& RANGE_MASK];
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outptr[7] = range_limit[(int) DESCALE(tmp10 - tmp3,
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CONST_BITS+PASS1_BITS+3)
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& RANGE_MASK];
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outptr[1] = range_limit[(int) DESCALE(tmp11 + tmp2,
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CONST_BITS+PASS1_BITS+3)
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& RANGE_MASK];
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outptr[6] = range_limit[(int) DESCALE(tmp11 - tmp2,
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CONST_BITS+PASS1_BITS+3)
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& RANGE_MASK];
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outptr[2] = range_limit[(int) DESCALE(tmp12 + tmp1,
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CONST_BITS+PASS1_BITS+3)
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& RANGE_MASK];
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outptr[5] = range_limit[(int) DESCALE(tmp12 - tmp1,
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CONST_BITS+PASS1_BITS+3)
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& RANGE_MASK];
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outptr[3] = range_limit[(int) DESCALE(tmp13 + tmp0,
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CONST_BITS+PASS1_BITS+3)
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& RANGE_MASK];
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outptr[4] = range_limit[(int) DESCALE(tmp13 - tmp0,
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CONST_BITS+PASS1_BITS+3)
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& RANGE_MASK];
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wsptr += DCTSIZE; /* advance pointer to next row */
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}
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}
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#ifdef HAVE_SSE2_INTEL_MNEMONICS
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/*
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* Intel SSE2 optimized Inverse Discrete Cosine Transform
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*
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*
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* Copyright (c) 2001-2002 Intel Corporation
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* All Rights Reserved
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*
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*
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* Authors:
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* Danilov G.
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*
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*
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*-----------------------------------------------------------------------------
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*
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* References:
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* K.R. Rao and P. Yip
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* Discrete Cosine Transform.
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* Algorithms, Advantages, Applications.
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* Academic Press, Inc, London, 1990.
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* JPEG Group's software.
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* This implementation is based on Appendix A.2 of the book (R&Y) ...
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*
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*-----------------------------------------------------------------------------
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*/
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typedef unsigned char Ipp8u;
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typedef unsigned short Ipp16u;
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typedef unsigned int Ipp32u;
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typedef signed char Ipp8s;
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typedef signed short Ipp16s;
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typedef signed int Ipp32s;
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#define BITS_INV_ACC 4
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#define SHIFT_INV_ROW 16 - BITS_INV_ACC
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#define SHIFT_INV_COL 1 + BITS_INV_ACC
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#define RND_INV_ROW 1024 * (6 - BITS_INV_ACC) /* 1 << (SHIFT_INV_ROW-1) */
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#define RND_INV_COL = 16 * (BITS_INV_ACC - 3) /* 1 << (SHIFT_INV_COL-1) */
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#define RND_INV_CORR = RND_INV_COL - 1 /* correction -1.0 and round */
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#define c_inv_corr_0 -1024 * (6 - BITS_INV_ACC) + 65536 /* -0.5 + (16.0 or 32.0) */
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#define c_inv_corr_1 1877 * (6 - BITS_INV_ACC) /* 0.9167 */
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#define c_inv_corr_2 1236 * (6 - BITS_INV_ACC) /* 0.6035 */
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#define c_inv_corr_3 680 * (6 - BITS_INV_ACC) /* 0.3322 */
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#define c_inv_corr_4 0 * (6 - BITS_INV_ACC) /* 0.0 */
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#define c_inv_corr_5 -569 * (6 - BITS_INV_ACC) /* -0.278 */
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#define c_inv_corr_6 -512 * (6 - BITS_INV_ACC) /* -0.25 */
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#define c_inv_corr_7 -651 * (6 - BITS_INV_ACC) /* -0.3176 */
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#define RND_INV_ROW_0 RND_INV_ROW + c_inv_corr_0
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#define RND_INV_ROW_1 RND_INV_ROW + c_inv_corr_1
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#define RND_INV_ROW_2 RND_INV_ROW + c_inv_corr_2
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#define RND_INV_ROW_3 RND_INV_ROW + c_inv_corr_3
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#define RND_INV_ROW_4 RND_INV_ROW + c_inv_corr_4
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#define RND_INV_ROW_5 RND_INV_ROW + c_inv_corr_5
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#define RND_INV_ROW_6 RND_INV_ROW + c_inv_corr_6
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#define RND_INV_ROW_7 RND_INV_ROW + c_inv_corr_7
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/* Table for rows 0,4 - constants are multiplied on cos_4_16 */
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__declspec(align(16)) short tab_i_04[] = {
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16384, 21407, 16384, 8867,
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-16384, 21407, 16384, -8867,
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16384, -8867, 16384, -21407,
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16384, 8867, -16384, -21407,
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22725, 19266, 19266, -4520,
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4520, 19266, 19266, -22725,
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12873, -22725, 4520, -12873,
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12873, 4520, -22725, -12873};
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/* Table for rows 1,7 - constants are multiplied on cos_1_16 */
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__declspec(align(16)) short tab_i_17[] = {
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22725, 29692, 22725, 12299,
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-22725, 29692, 22725, -12299,
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22725, -12299, 22725, -29692,
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22725, 12299, -22725, -29692,
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31521, 26722, 26722, -6270,
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6270, 26722, 26722, -31521,
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17855, -31521, 6270, -17855,
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17855, 6270, -31521, -17855};
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/* Table for rows 2,6 - constants are multiplied on cos_2_16 */
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__declspec(align(16)) short tab_i_26[] = {
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21407, 27969, 21407, 11585,
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-21407, 27969, 21407, -11585,
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21407, -11585, 21407, -27969,
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21407, 11585, -21407, -27969,
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29692, 25172, 25172, -5906,
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5906, 25172, 25172, -29692,
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16819, -29692, 5906, -16819,
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16819, 5906, -29692, -16819};
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/* Table for rows 3,5 - constants are multiplied on cos_3_16 */
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__declspec(align(16)) short tab_i_35[] = {
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19266, 25172, 19266, 10426,
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-19266, 25172, 19266, -10426,
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19266, -10426, 19266, -25172,
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19266, 10426, -19266, -25172,
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26722, 22654, 22654, -5315,
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5315, 22654, 22654, -26722,
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15137, -26722, 5315, -15137,
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15137, 5315, -26722, -15137};
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__declspec(align(16)) long round_i_0[] = {RND_INV_ROW_0,RND_INV_ROW_0,
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RND_INV_ROW_0,RND_INV_ROW_0};
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__declspec(align(16)) long round_i_1[] = {RND_INV_ROW_1,RND_INV_ROW_1,
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RND_INV_ROW_1,RND_INV_ROW_1};
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__declspec(align(16)) long round_i_2[] = {RND_INV_ROW_2,RND_INV_ROW_2,
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RND_INV_ROW_2,RND_INV_ROW_2};
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__declspec(align(16)) long round_i_3[] = {RND_INV_ROW_3,RND_INV_ROW_3,
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RND_INV_ROW_3,RND_INV_ROW_3};
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__declspec(align(16)) long round_i_4[] = {RND_INV_ROW_4,RND_INV_ROW_4,
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RND_INV_ROW_4,RND_INV_ROW_4};
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__declspec(align(16)) long round_i_5[] = {RND_INV_ROW_5,RND_INV_ROW_5,
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RND_INV_ROW_5,RND_INV_ROW_5};
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__declspec(align(16)) long round_i_6[] = {RND_INV_ROW_6,RND_INV_ROW_6,
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RND_INV_ROW_6,RND_INV_ROW_6};
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__declspec(align(16)) long round_i_7[] = {RND_INV_ROW_7,RND_INV_ROW_7,
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RND_INV_ROW_7,RND_INV_ROW_7};
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__declspec(align(16)) short tg_1_16[] = {
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13036, 13036, 13036, 13036, /* tg * (2<<16) + 0.5 */
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13036, 13036, 13036, 13036};
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__declspec(align(16)) short tg_2_16[] = {
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27146, 27146, 27146, 27146, /* tg * (2<<16) + 0.5 */
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27146, 27146, 27146, 27146};
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__declspec(align(16)) short tg_3_16[] = {
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-21746, -21746, -21746, -21746, /* tg * (2<<16) + 0.5 */
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-21746, -21746, -21746, -21746};
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__declspec(align(16)) short cos_4_16[] = {
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-19195, -19195, -19195, -19195, /* cos * (2<<16) + 0.5 */
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-19195, -19195, -19195, -19195};
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/*
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* In this implementation the outputs of the iDCT-1D are multiplied
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* for rows 0,4 - on cos_4_16,
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* for rows 1,7 - on cos_1_16,
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* for rows 2,6 - on cos_2_16,
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* for rows 3,5 - on cos_3_16
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* and are shifted to the left for rise of accuracy
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*
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* For used constants
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* FIX(float_const) = (short) (float_const * (1<<15) + 0.5)
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*
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*-----------------------------------------------------------------------------
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*
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* On the first stage the calculation is executed at once for two rows.
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* The permutation for each output row is done on second stage
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* t7 t6 t5 t4 t3 t2 t1 t0 -> t4 t5 t6 t7 t3 t2 t1 t0
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*
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*-----------------------------------------------------------------------------
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*/
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#define DCT_8_INV_ROW_2R(TABLE, ROUND1, ROUND2) __asm { \
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__asm pshuflw xmm1, xmm0, 10001000b \
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__asm pshuflw xmm0, xmm0, 11011101b \
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__asm pshufhw xmm1, xmm1, 10001000b \
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__asm pshufhw xmm0, xmm0, 11011101b \
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__asm movdqa xmm2, XMMWORD PTR [TABLE] \
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__asm pmaddwd xmm2, xmm1 \
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__asm movdqa xmm3, XMMWORD PTR [TABLE + 32] \
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__asm pmaddwd xmm3, xmm0 \
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__asm pmaddwd xmm1, XMMWORD PTR [TABLE + 16] \
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__asm pmaddwd xmm0, XMMWORD PTR [TABLE + 48] \
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__asm pshuflw xmm5, xmm4, 10001000b \
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__asm pshuflw xmm4, xmm4, 11011101b \
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__asm pshufhw xmm5, xmm5, 10001000b \
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__asm pshufhw xmm4, xmm4, 11011101b \
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__asm movdqa xmm6, XMMWORD PTR [TABLE] \
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__asm pmaddwd xmm6, xmm5 \
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__asm movdqa xmm7, XMMWORD PTR [TABLE + 32] \
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__asm pmaddwd xmm7, xmm4 \
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__asm pmaddwd xmm5, XMMWORD PTR [TABLE + 16] \
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__asm pmaddwd xmm4, XMMWORD PTR [TABLE + 48] \
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__asm pshufd xmm1, xmm1, 01001110b \
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__asm pshufd xmm0, xmm0, 01001110b \
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__asm paddd xmm2, XMMWORD PTR [ROUND1] \
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__asm paddd xmm3, xmm0 \
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__asm paddd xmm1, xmm2 \
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__asm pshufd xmm5, xmm5, 01001110b \
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__asm pshufd xmm4, xmm4, 01001110b \
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__asm movdqa xmm2, xmm1 \
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__asm psubd xmm2, xmm3 \
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__asm psrad xmm2, SHIFT_INV_ROW \
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__asm paddd xmm1, xmm3 \
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__asm psrad xmm1, SHIFT_INV_ROW \
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__asm packssdw xmm1, xmm2 \
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__asm paddd xmm6, XMMWORD PTR [ROUND2] \
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__asm paddd xmm7, xmm4 \
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__asm paddd xmm5, xmm6 \
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__asm movdqa xmm6, xmm5 \
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__asm psubd xmm6, xmm7 \
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__asm psrad xmm6, SHIFT_INV_ROW \
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__asm paddd xmm5, xmm7 \
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__asm psrad xmm5, SHIFT_INV_ROW \
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__asm packssdw xmm5, xmm6 \
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}
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/*
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*
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* The second stage - inverse DCTs of columns
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*
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* The inputs are multiplied
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* for rows 0,4 - on cos_4_16,
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* for rows 1,7 - on cos_1_16,
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* for rows 2,6 - on cos_2_16,
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* for rows 3,5 - on cos_3_16
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* and are shifted to the left for rise of accuracy
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*/
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#define DCT_8_INV_COL_8R(INP, OUTP) __asm { \
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__asm movdqa xmm0, [INP + 5*16] \
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__asm movdqa xmm1, XMMWORD PTR tg_3_16 \
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__asm movdqa xmm2, xmm0 \
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__asm movdqa xmm3, [INP + 3*16] \
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__asm pmulhw xmm0, xmm1 \
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__asm movdqa xmm4, [INP + 7*16] \
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__asm pmulhw xmm1, xmm3 \
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__asm movdqa xmm5, XMMWORD PTR tg_1_16 \
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__asm movdqa xmm6, xmm4 \
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__asm pmulhw xmm4, xmm5 \
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__asm paddsw xmm0, xmm2 \
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__asm pmulhw xmm5, [INP + 1*16] \
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__asm paddsw xmm1, xmm3 \
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__asm movdqa xmm7, [INP + 6*16] \
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__asm paddsw xmm0, xmm3 \
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__asm movdqa xmm3, XMMWORD PTR tg_2_16 \
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__asm psubsw xmm2, xmm1 \
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__asm pmulhw xmm7, xmm3 \
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__asm movdqa xmm1, xmm0 \
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__asm pmulhw xmm3, [INP + 2*16] \
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__asm psubsw xmm5, xmm6 \
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__asm paddsw xmm4, [INP + 1*16] \
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__asm paddsw xmm0, xmm4 \
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__asm psubsw xmm4, xmm1 \
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__asm pshufhw xmm0, xmm0, 00011011b \
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__asm paddsw xmm7, [INP + 2*16] \
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__asm movdqa xmm6, xmm5 \
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__asm psubsw xmm3, [INP + 6*16] \
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__asm psubsw xmm5, xmm2 \
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__asm paddsw xmm6, xmm2 \
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__asm movdqa [OUTP + 7*16], xmm0 \
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__asm movdqa xmm1, xmm4 \
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__asm movdqa xmm2, XMMWORD PTR cos_4_16 \
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__asm paddsw xmm4, xmm5 \
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__asm movdqa xmm0, XMMWORD PTR cos_4_16 \
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|
__asm pmulhw xmm2, xmm4 \
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__asm pshufhw xmm6, xmm6, 00011011b \
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__asm movdqa [OUTP + 3*16], xmm6 \
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__asm psubsw xmm1, xmm5 \
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__asm movdqa xmm6, [INP + 0*16] \
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__asm pmulhw xmm0, xmm1 \
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__asm movdqa xmm5, [INP + 4*16] \
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__asm paddsw xmm4, xmm2 \
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__asm paddsw xmm5, xmm6 \
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__asm psubsw xmm6, [INP + 4*16] \
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__asm paddsw xmm0, xmm1 \
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__asm pshufhw xmm4, xmm4, 00011011b \
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__asm movdqa xmm2, xmm5 \
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__asm paddsw xmm5, xmm7 \
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|
__asm movdqa xmm1, xmm6 \
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__asm psubsw xmm2, xmm7 \
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__asm movdqa xmm7, [OUTP + 7*16] \
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__asm paddsw xmm6, xmm3 \
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__asm pshufhw xmm5, xmm5, 00011011b \
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|
__asm paddsw xmm7, xmm5 \
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|
__asm psubsw xmm1, xmm3 \
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|
__asm pshufhw xmm6, xmm6, 00011011b \
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|
__asm movdqa xmm3, xmm6 \
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__asm paddsw xmm6, xmm4 \
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|
__asm pshufhw xmm2, xmm2, 00011011b \
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__asm psraw xmm7, SHIFT_INV_COL \
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|
__asm movdqa [OUTP + 0*16], xmm7 \
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|
__asm movdqa xmm7, xmm1 \
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__asm paddsw xmm1, xmm0 \
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__asm psraw xmm6, SHIFT_INV_COL \
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__asm movdqa [OUTP + 1*16], xmm6 \
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|
__asm pshufhw xmm1, xmm1, 00011011b \
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|
__asm movdqa xmm6, [OUTP + 3*16] \
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|
__asm psubsw xmm7, xmm0 \
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|
__asm psraw xmm1, SHIFT_INV_COL \
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|
__asm movdqa [OUTP + 2*16], xmm1 \
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|
__asm psubsw xmm5, [OUTP + 7*16] \
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|
__asm paddsw xmm6, xmm2 \
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|
__asm psubsw xmm2, [OUTP + 3*16] \
|
|
__asm psubsw xmm3, xmm4 \
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|
__asm psraw xmm7, SHIFT_INV_COL \
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|
__asm pshufhw xmm7, xmm7, 00011011b \
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|
__asm movdqa [OUTP + 5*16], xmm7 \
|
|
__asm psraw xmm5, SHIFT_INV_COL \
|
|
__asm movdqa [OUTP + 7*16], xmm5 \
|
|
__asm psraw xmm6, SHIFT_INV_COL \
|
|
__asm movdqa [OUTP + 3*16], xmm6 \
|
|
__asm psraw xmm2, SHIFT_INV_COL \
|
|
__asm movdqa [OUTP + 4*16], xmm2 \
|
|
__asm psraw xmm3, SHIFT_INV_COL \
|
|
__asm movdqa [OUTP + 6*16], xmm3 \
|
|
}
|
|
|
|
/*
|
|
*
|
|
* Name: dct_8x8_inv_16s
|
|
* Purpose: Inverse Discrete Cosine Transform 8x8 with
|
|
* 2D buffer of short int data
|
|
* Context:
|
|
* void dct_8x8_inv_16s ( short *src, short *dst )
|
|
* Parameters:
|
|
* src - Pointer to the source buffer
|
|
* dst - Pointer to the destination buffer
|
|
*
|
|
*/
|
|
|
|
GLOBAL(void)
|
|
dct_8x8_inv_16s ( short *src, short *dst ) {
|
|
|
|
__asm {
|
|
|
|
mov ecx, src
|
|
mov edx, dst
|
|
|
|
movdqa xmm0, [ecx+0*16]
|
|
movdqa xmm4, [ecx+4*16]
|
|
DCT_8_INV_ROW_2R(tab_i_04, round_i_0, round_i_4)
|
|
movdqa [edx+0*16], xmm1
|
|
movdqa [edx+4*16], xmm5
|
|
|
|
movdqa xmm0, [ecx+1*16]
|
|
movdqa xmm4, [ecx+7*16]
|
|
DCT_8_INV_ROW_2R(tab_i_17, round_i_1, round_i_7)
|
|
movdqa [edx+1*16], xmm1
|
|
movdqa [edx+7*16], xmm5
|
|
|
|
movdqa xmm0, [ecx+3*16]
|
|
movdqa xmm4, [ecx+5*16]
|
|
DCT_8_INV_ROW_2R(tab_i_35, round_i_3, round_i_5);
|
|
movdqa [edx+3*16], xmm1
|
|
movdqa [edx+5*16], xmm5
|
|
|
|
movdqa xmm0, [ecx+2*16]
|
|
movdqa xmm4, [ecx+6*16]
|
|
DCT_8_INV_ROW_2R(tab_i_26, round_i_2, round_i_6);
|
|
movdqa [edx+2*16], xmm1
|
|
movdqa [edx+6*16], xmm5
|
|
|
|
DCT_8_INV_COL_8R(edx+0, edx+0);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Name:
|
|
* ownpj_QuantInv_8x8_16s
|
|
*
|
|
* Purpose:
|
|
* Dequantize 8x8 block of DCT coefficients
|
|
*
|
|
* Context:
|
|
* void ownpj_QuantInv_8x8_16s
|
|
* Ipp16s* pSrc,
|
|
* Ipp16s* pDst,
|
|
* const Ipp16u* pQTbl)*
|
|
*
|
|
*/
|
|
|
|
GLOBAL(void)
|
|
ownpj_QuantInv_8x8_16s(short * pSrc, short * pDst, const unsigned short * pQTbl)
|
|
{
|
|
__asm {
|
|
|
|
push ebx
|
|
push ecx
|
|
push edx
|
|
push esi
|
|
push edi
|
|
|
|
mov esi, pSrc
|
|
mov edi, pDst
|
|
mov edx, pQTbl
|
|
mov ecx, 4
|
|
mov ebx, 32
|
|
|
|
again:
|
|
|
|
movq mm0, QWORD PTR [esi+0]
|
|
movq mm1, QWORD PTR [esi+8]
|
|
movq mm2, QWORD PTR [esi+16]
|
|
movq mm3, QWORD PTR [esi+24]
|
|
|
|
prefetcht0 [esi+ebx] ; fetch next cache line
|
|
|
|
pmullw mm0, QWORD PTR [edx+0]
|
|
pmullw mm1, QWORD PTR [edx+8]
|
|
pmullw mm2, QWORD PTR [edx+16]
|
|
pmullw mm3, QWORD PTR [edx+24]
|
|
|
|
movq QWORD PTR [edi+0], mm0
|
|
movq QWORD PTR [edi+8], mm1
|
|
movq QWORD PTR [edi+16], mm2
|
|
movq QWORD PTR [edi+24], mm3
|
|
|
|
add esi, ebx
|
|
add edi, ebx
|
|
add edx, ebx
|
|
dec ecx
|
|
jnz again
|
|
|
|
emms
|
|
|
|
pop edi
|
|
pop esi
|
|
pop edx
|
|
pop ecx
|
|
pop ebx
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Name:
|
|
* ownpj_Add128_8x8_16s8u
|
|
*
|
|
* Purpose:
|
|
* signed to unsigned conversion (level shift)
|
|
* for 8x8 block of DCT coefficients
|
|
*
|
|
* Context:
|
|
* void ownpj_Add128_8x8_16s8u
|
|
* const Ipp16s* pSrc,
|
|
* Ipp8u* pDst,
|
|
* int DstStep);
|
|
*
|
|
*/
|
|
|
|
__declspec(align(16)) long const_128[]= {0x00800080, 0x00800080, 0x00800080, 0x00800080};
|
|
|
|
GLOBAL(void)
|
|
ownpj_Add128_8x8_16s8u(const short * pSrc, unsigned char * pDst, int DstStep)
|
|
{
|
|
__asm {
|
|
push eax
|
|
push ebx
|
|
push ecx
|
|
push edx
|
|
push esi
|
|
push edi
|
|
|
|
mov esi, pSrc
|
|
mov edi, pDst
|
|
mov edx, DstStep
|
|
mov ecx, 2
|
|
mov ebx, edx
|
|
mov eax, edx
|
|
sal ebx, 1
|
|
add eax, ebx
|
|
movdqa xmm7, XMMWORD PTR const_128
|
|
|
|
again:
|
|
|
|
movdqa xmm0, XMMWORD PTR [esi+0] ; line 0
|
|
movdqa xmm1, XMMWORD PTR [esi+16] ; line 1
|
|
movdqa xmm2, XMMWORD PTR [esi+32] ; line 2
|
|
movdqa xmm3, XMMWORD PTR [esi+48] ; line 3
|
|
|
|
paddw xmm0, xmm7
|
|
paddw xmm1, xmm7
|
|
paddw xmm2, xmm7
|
|
paddw xmm3, xmm7
|
|
|
|
packuswb xmm0, xmm1
|
|
packuswb xmm2, xmm3
|
|
|
|
movq QWORD PTR [edi], xmm0 ;0*DstStep
|
|
movq QWORD PTR [edi+ebx], xmm2 ;2*DstStep
|
|
|
|
psrldq xmm0, 8
|
|
psrldq xmm2, 8
|
|
|
|
movq QWORD PTR [edi+edx], xmm0 ;1*DstStep
|
|
movq QWORD PTR [edi+eax], xmm2 ;3*DstStep
|
|
|
|
add edi, ebx
|
|
add esi, 64
|
|
add edi, ebx
|
|
dec ecx
|
|
jnz again
|
|
|
|
pop edi
|
|
pop esi
|
|
pop edx
|
|
pop ecx
|
|
pop ebx
|
|
pop eax
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Name:
|
|
* ippiDCTQuantInv8x8LS_JPEG_16s8u_C1R
|
|
*
|
|
* Purpose:
|
|
* Inverse DCT transform, de-quantization and level shift
|
|
*
|
|
* Parameters:
|
|
* pSrc - pointer to source
|
|
* pDst - pointer to output array
|
|
* DstStep - line offset for output data
|
|
* pEncoderQuantTable - pointer to Quantization table
|
|
*
|
|
*/
|
|
|
|
GLOBAL(void)
|
|
ippiDCTQuantInv8x8LS_JPEG_16s8u_C1R(
|
|
short * pSrc,
|
|
unsigned char * pDst,
|
|
int DstStep,
|
|
const unsigned short * pQuantInvTable)
|
|
{
|
|
|
|
__declspec(align(16)) Ipp8u buf[DCTSIZE2*sizeof(Ipp16s)];
|
|
Ipp16s * workbuf = (Ipp16s *)buf;
|
|
|
|
ownpj_QuantInv_8x8_16s(pSrc,workbuf,pQuantInvTable);
|
|
dct_8x8_inv_16s(workbuf,workbuf);
|
|
ownpj_Add128_8x8_16s8u(workbuf,pDst,DstStep);
|
|
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jpeg_idct_islow_sse2 (
|
|
j_decompress_ptr cinfo,
|
|
jpeg_component_info * compptr,
|
|
JCOEFPTR coef_block,
|
|
JSAMPARRAY output_buf,
|
|
JDIMENSION output_col)
|
|
{
|
|
int ctr;
|
|
JCOEFPTR inptr;
|
|
Ipp16u* quantptr;
|
|
Ipp8u* wsptr;
|
|
__declspec(align(16)) Ipp8u workspace[DCTSIZE2];
|
|
JSAMPROW outptr;
|
|
|
|
inptr = coef_block;
|
|
quantptr = (Ipp16u*)compptr->dct_table;
|
|
wsptr = workspace;
|
|
|
|
ippiDCTQuantInv8x8LS_JPEG_16s8u_C1R(inptr, workspace, 8, quantptr);
|
|
|
|
for(ctr = 0; ctr < DCTSIZE; ctr++)
|
|
{
|
|
outptr = output_buf[ctr] + output_col;
|
|
|
|
outptr[0] = wsptr[0];
|
|
outptr[1] = wsptr[1];
|
|
outptr[2] = wsptr[2];
|
|
outptr[3] = wsptr[3];
|
|
outptr[4] = wsptr[4];
|
|
outptr[5] = wsptr[5];
|
|
outptr[6] = wsptr[6];
|
|
outptr[7] = wsptr[7];
|
|
|
|
wsptr += DCTSIZE;
|
|
}
|
|
}
|
|
#endif /* HAVE_SSE2_INTEL_MNEMONICS */
|
|
|
|
#endif /* DCT_ISLOW_SUPPORTED */
|