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authorSean Bartell <wingedtachikoma@gmail.com>2011-06-25 21:32:25 -0400
committerNils Wallménius <nils@rockbox.org>2012-04-25 22:13:20 +0200
commitf40bfc9267b13b54e6379dfe7539447662879d24 (patch)
tree9b20069d5e62809ff434061ad730096836f916f2 /apps/codecs/libmusepack/synth_filter.c
parenta0009907de7a0107d49040d8a180f140e2eff299 (diff)
downloadrockbox-f40bfc9267b13b54e6379dfe7539447662879d24.tar.gz
rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.zip
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius <nils@rockbox.org> Tested-by: Nils Wallménius <nils@rockbox.org>
Diffstat (limited to 'apps/codecs/libmusepack/synth_filter.c')
-rw-r--r--apps/codecs/libmusepack/synth_filter.c610
1 files changed, 0 insertions, 610 deletions
diff --git a/apps/codecs/libmusepack/synth_filter.c b/apps/codecs/libmusepack/synth_filter.c
deleted file mode 100644
index 3ad2b236a0..0000000000
--- a/apps/codecs/libmusepack/synth_filter.c
+++ /dev/null
@@ -1,610 +0,0 @@
-/*
- Copyright (c) 2005, The Musepack Development Team
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-
- * Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following
- disclaimer in the documentation and/or other materials provided
- with the distribution.
-
- * Neither the name of the The Musepack Development Team nor the
- names of its contributors may be used to endorse or promote
- products derived from this software without specific prior
- written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/// \file synth_filter.c
-/// Synthesis functions.
-/// \todo document me
-#include <string.h>
-#include <codecs.h>
-#include "mpcdec.h"
-#include "decoder.h"
-#include "mpcdec_math.h"
-#include "internal.h"
-
-/* C O N S T A N T S */
-#undef _
-
-#if defined(MPC_FIXED_POINT)
- #if defined(CPU_ARM)
- #if ARM_ARCH >= 6
- // on ARMv6 we use 32*32=64>>32 multiplies (smmul/smmla) so we need to scale up the D coefficients
- // the ARM11 multiplier doesn't have early termination so the magnitude of the multiplicands does not
- // matter for speed.
- #define D(value) (value << (14))
- #else
- // do not up-scale D-values to achieve higher speed in smull/mlal
- // operations. saves ~14/8 = 1.75 cycles per multiplication
- #define D(value) (value)
- #endif
- // in this configuration a post-shift by >>16 is needed after synthesis
- #else
- // saturate to +/- 2^31 (= value << (31-17)), D-values are +/- 2^17
- #define D(value) (value << (14))
- #endif
-#else
- // IMPORTANT: internal scaling is somehow strange for floating point, therefore we scale the coefficients Di_opt
- // by the correct amount to have proper scaled output
- #define D(value) MAKE_MPC_SAMPLE((double)value*(double)(0x1000))
-#endif
-
-// Di_opt coefficients are +/- 2^17 (pre-shifted by <<16)
-static const MPC_SAMPLE_FORMAT Di_opt [512] ICONST_ATTR MEM_ALIGN_ATTR = {
-/* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 */
-/* 0 */ D( 0), -D( 29), D(213), -D( 459), D(2037), -D(5153), D( 6574), -D(37489), D(75038), D(37489), D(6574), D(5153), D(2037), D(459), D(213), D(29),
-/* 1 */ -D( 1), -D( 31), D(218), -D( 519), D(2000), -D(5517), D( 5959), -D(39336), D(74992), D(35640), D(7134), D(4788), D(2063), D(401), D(208), D(26),
-/* 2 */ -D( 1), -D( 35), D(222), -D( 581), D(1952), -D(5879), D( 5288), -D(41176), D(74856), D(33791), D(7640), D(4425), D(2080), D(347), D(202), D(24),
-/* 3 */ -D( 1), -D( 38), D(225), -D( 645), D(1893), -D(6237), D( 4561), -D(43006), D(74630), D(31947), D(8092), D(4063), D(2087), D(294), D(196), D(21),
-/* 4 */ -D( 1), -D( 41), D(227), -D( 711), D(1822), -D(6589), D( 3776), -D(44821), D(74313), D(30112), D(8492), D(3705), D(2085), D(244), D(190), D(19),
-/* 5 */ -D( 1), -D( 45), D(228), -D( 779), D(1739), -D(6935), D( 2935), -D(46617), D(73908), D(28289), D(8840), D(3351), D(2075), D(197), D(183), D(17),
-/* 6 */ -D( 1), -D( 49), D(228), -D( 848), D(1644), -D(7271), D( 2037), -D(48390), D(73415), D(26482), D(9139), D(3004), D(2057), D(153), D(176), D(16),
-/* 7 */ -D( 2), -D( 53), D(227), -D( 919), D(1535), -D(7597), D( 1082), -D(50137), D(72835), D(24694), D(9389), D(2663), D(2032), D(111), D(169), D(14),
-/* 8 */ -D( 2), -D( 58), D(224), -D( 991), D(1414), -D(7910), D( 70), -D(51853), D(72169), D(22929), D(9592), D(2330), D(2001), D( 72), D(161), D(13),
-/* 9 */ -D( 2), -D( 63), D(221), -D(1064), D(1280), -D(8209), -D( 998), -D(53534), D(71420), D(21189), D(9750), D(2006), D(1962), D( 36), D(154), D(11),
-/* 10 */ -D( 2), -D( 68), D(215), -D(1137), D(1131), -D(8491), -D( 2122), -D(55178), D(70590), D(19478), D(9863), D(1692), D(1919), D( 2), D(147), D(10),
-/* 11 */ -D( 3), -D( 73), D(208), -D(1210), D( 970), -D(8755), -D( 3300), -D(56778), D(69679), D(17799), D(9935), D(1388), D(1870), -D( 29), D(139), D( 9),
-/* 12 */ -D( 3), -D( 79), D(200), -D(1283), D( 794), -D(8998), -D( 4533), -D(58333), D(68692), D(16155), D(9966), D(1095), D(1817), -D( 57), D(132), D( 8),
-/* 13 */ -D( 4), -D( 85), D(189), -D(1356), D( 605), -D(9219), -D( 5818), -D(59838), D(67629), D(14548), D(9959), D( 814), D(1759), -D( 83), D(125), D( 7),
-/* 14 */ -D( 4), -D( 91), D(177), -D(1428), D( 402), -D(9416), -D( 7154), -D(61289), D(66494), D(12980), D(9916), D( 545), D(1698), -D(106), D(117), D( 7),
-/* 15 */ -D( 5), -D( 97), D(163), -D(1498), D( 185), -D(9585), -D( 8540), -D(62684), D(65290), D(11455), D(9838), D( 288), D(1634), -D(127), D(111), D( 6),
-/* 16 */ -D( 5), -D(104), D(146), -D(1567), -D( 45), -D(9727), -D( 9975), -D(64019), D(64019), D( 9975), D(9727), D( 45), D(1567), -D(146), D(104), D( 5),
-/* 17 */ -D( 6), -D(111), D(127), -D(1634), -D( 288), -D(9838), -D(11455), -D(65290), D(62684), D( 8540), D(9585), -D( 185), D(1498), -D(163), D( 97), D( 5),
-/* 18 */ -D( 7), -D(117), D(106), -D(1698), -D( 545), -D(9916), -D(12980), -D(66494), D(61289), D( 7154), D(9416), -D( 402), D(1428), -D(177), D( 91), D( 4),
-/* 19 */ -D( 7), -D(125), D( 83), -D(1759), -D( 814), -D(9959), -D(14548), -D(67629), D(59838), D( 5818), D(9219), -D( 605), D(1356), -D(189), D( 85), D( 4),
-/* 20 */ -D( 8), -D(132), D( 57), -D(1817), -D(1095), -D(9966), -D(16155), -D(68692), D(58333), D( 4533), D(8998), -D( 794), D(1283), -D(200), D( 79), D( 3),
-/* 21 */ -D( 9), -D(139), D( 29), -D(1870), -D(1388), -D(9935), -D(17799), -D(69679), D(56778), D( 3300), D(8755), -D( 970), D(1210), -D(208), D( 73), D( 3),
-/* 22 */ -D(10), -D(147), -D( 2), -D(1919), -D(1692), -D(9863), -D(19478), -D(70590), D(55178), D( 2122), D(8491), -D(1131), D(1137), -D(215), D( 68), D( 2),
-/* 23 */ -D(11), -D(154), -D( 36), -D(1962), -D(2006), -D(9750), -D(21189), -D(71420), D(53534), D( 998), D(8209), -D(1280), D(1064), -D(221), D( 63), D( 2),
-/* 24 */ -D(13), -D(161), -D( 72), -D(2001), -D(2330), -D(9592), -D(22929), -D(72169), D(51853), -D( 70), D(7910), -D(1414), D( 991), -D(224), D( 58), D( 2),
-/* 25 */ -D(14), -D(169), -D(111), -D(2032), -D(2663), -D(9389), -D(24694), -D(72835), D(50137), -D( 1082), D(7597), -D(1535), D( 919), -D(227), D( 53), D( 2),
-/* 26 */ -D(16), -D(176), -D(153), -D(2057), -D(3004), -D(9139), -D(26482), -D(73415), D(48390), -D( 2037), D(7271), -D(1644), D( 848), -D(228), D( 49), D( 1),
-/* 27 */ -D(17), -D(183), -D(197), -D(2075), -D(3351), -D(8840), -D(28289), -D(73908), D(46617), -D( 2935), D(6935), -D(1739), D( 779), -D(228), D( 45), D( 1),
-/* 28 */ -D(19), -D(190), -D(244), -D(2085), -D(3705), -D(8492), -D(30112), -D(74313), D(44821), -D( 3776), D(6589), -D(1822), D( 711), -D(227), D( 41), D( 1),
-/* 29 */ -D(21), -D(196), -D(294), -D(2087), -D(4063), -D(8092), -D(31947), -D(74630), D(43006), -D( 4561), D(6237), -D(1893), D( 645), -D(225), D( 38), D( 1),
-/* 30 */ -D(24), -D(202), -D(347), -D(2080), -D(4425), -D(7640), -D(33791), -D(74856), D(41176), -D( 5288), D(5879), -D(1952), D( 581), -D(222), D( 35), D( 1),
-/* 31 */ -D(26), -D(208), -D(401), -D(2063), -D(4788), -D(7134), -D(35640), -D(74992), D(39336), -D( 5959), D(5517), -D(2000), D( 519), -D(218), D( 31), D( 1)
-};
-
-#undef D
-
-// DCT32-coefficients were expanded (<<) by DCT32_COEFFICIENT_EXPAND
-#define DCT32_COEFFICIENT_EXPAND 31
-
-#if defined(MPC_FIXED_POINT)
- // define 64=32x32-multiplication for DCT-coefficients with samples. Via usage of MPC_FRACT highly optimized assembler might be used
- // MULTIPLY_FRACT will perform >>32 after multiplication, as coef were expanded by DCT32_COEFFICIENT_EXPAND we'll correct this on the result.
- // Will loose 4 bit accuracy on result in fract part without effect on final audio result
- #define MPC_DCT32_MUL(sample, coef) (MPC_MULTIPLY_FRACT(sample,coef) << (32-DCT32_COEFFICIENT_EXPAND))
- #define MPC_DCT32_SHIFT(sample) (sample)
-#else
- // for floating point use the standard multiplication macro
- #define MPC_DCT32_MUL(sample, coef) (MPC_MULTIPLY(sample, coef) )
- #define MPC_DCT32_SHIFT(sample) (sample)
-#endif
-
-/******************************************************************************
- * mpc_dct32(const int *in, int *out)
- *
- * mpc_dct32 is a dct32 with in[32]->dct[32] that contains the mirroring from
- * dct[32] to the expected out[64]. The symmetry is
- * out[16] = 0,
- * out[ 0..15] = dct[ 0..15],
- * out[32..17] = -dct[ 0..15],
- * out[33..48] = -dct[16..31],
- * out[63..48] = -dct[16..31].
- * The cos-tab has the format s0.31.
- *****************************************************************************/
-void
-mpc_dct32(const MPC_SAMPLE_FORMAT *in, MPC_SAMPLE_FORMAT *v)
-ICODE_ATTR_MPC_LARGE_IRAM;
-
-void
-mpc_dct32(const MPC_SAMPLE_FORMAT *in, MPC_SAMPLE_FORMAT *v)
-{
- MPC_SAMPLE_FORMAT t0, t1, t2, t3, t4, t5, t6, t7;
- MPC_SAMPLE_FORMAT t8, t9, t10, t11, t12, t13, t14, t15;
- MPC_SAMPLE_FORMAT t16, t17, t18, t19, t20, t21, t22, t23;
- MPC_SAMPLE_FORMAT t24, t25, t26, t27, t28, t29, t30, t31;
- MPC_SAMPLE_FORMAT t32, t33, t34, t35, t36, t37, t38, t39;
- MPC_SAMPLE_FORMAT t40, t41, t42, t43, t44, t45, t46, t47;
- MPC_SAMPLE_FORMAT t48, t49, t50, t51, t52, t53, t54, t55;
- MPC_SAMPLE_FORMAT t56, t57, t58, t59, t60, t61, t62, t63;
- MPC_SAMPLE_FORMAT t64, t65, t66, t67, t68, t69, t70, t71;
- MPC_SAMPLE_FORMAT t72, t73, t74, t75, t76, t77, t78, t79;
- MPC_SAMPLE_FORMAT t80, t81, t82, t83, t84, t85, t86, t87;
- MPC_SAMPLE_FORMAT t88, t89, t90, t91, t92, t93, t94, t95;
- MPC_SAMPLE_FORMAT t96, t97, t98, t99, t100, t101, t102, t103;
- MPC_SAMPLE_FORMAT t104, t105, t106, t107, t108, t109, t110, t111;
- MPC_SAMPLE_FORMAT t112, t113, t114, t115, t116, t117, t118, t119;
- MPC_SAMPLE_FORMAT t120, t121, t122, t123, t124, t125, t126, t127;
- MPC_SAMPLE_FORMAT t128, t129, t130, t131, t132, t133, t134, t135;
- MPC_SAMPLE_FORMAT t136, t137, t138, t139, t140, t141, t142, t143;
- MPC_SAMPLE_FORMAT t144, t145, t146, t147, t148, t149, t150, t151;
- MPC_SAMPLE_FORMAT t152, t153, t154, t155, t156, t157, t158, t159;
- MPC_SAMPLE_FORMAT t160, t161, t162, t163, t164, t165, t166, t167;
- MPC_SAMPLE_FORMAT t168, t169, t170, t171, t172, t173, t174, t175;
- MPC_SAMPLE_FORMAT t176;
-
- /* costab[i] = cos(PI / (2 * 32) * i) */
-#define costab01 (0x7fd8878e) /* 0.998795456 */
-#define costab02 (0x7f62368f) /* 0.995184727 */
-#define costab03 (0x7e9d55fc) /* 0.989176510 */
-#define costab04 (0x7d8a5f40) /* 0.980785280 */
-#define costab05 (0x7c29fbee) /* 0.970031253 */
-#define costab06 (0x7a7d055b) /* 0.956940336 */
-#define costab07 (0x78848414) /* 0.941544065 */
-#define costab08 (0x7641af3d) /* 0.923879533 */
-#define costab09 (0x73b5ebd1) /* 0.903989293 */
-#define costab10 (0x70e2cbc6) /* 0.881921264 */
-#define costab11 (0x6dca0d14) /* 0.857728610 */
-#define costab12 (0x6a6d98a4) /* 0.831469612 */
-#define costab13 (0x66cf8120) /* 0.803207531 */
-#define costab14 (0x62f201ac) /* 0.773010453 */
-#define costab15 (0x5ed77c8a) /* 0.740951125 */
-#define costab16 (0x5a82799a) /* 0.707106781 */
-#define costab17 (0x55f5a4d2) /* 0.671558955 */
-#define costab18 (0x5133cc94) /* 0.634393284 */
-#define costab19 (0x4c3fdff4) /* 0.595699304 */
-#define costab20 (0x471cece7) /* 0.555570233 */
-#define costab21 (0x41ce1e65) /* 0.514102744 */
-#define costab22 (0x3c56ba70) /* 0.471396737 */
-#define costab23 (0x36ba2014) /* 0.427555093 */
-#define costab24 (0x30fbc54d) /* 0.382683432 */
-#define costab25 (0x2b1f34eb) /* 0.336889853 */
-#define costab26 (0x25280c5e) /* 0.290284677 */
-#define costab27 (0x1f19f97b) /* 0.242980180 */
-#define costab28 (0x18f8b83c) /* 0.195090322 */
-#define costab29 (0x12c8106f) /* 0.146730474 */
-#define costab30 (0x0c8bd35e) /* 0.098017140 */
-#define costab31 (0x0647d97c) /* 0.049067674 */
-
- t0 = in[ 0] + in[31]; t16 = MPC_DCT32_MUL(in[ 0] - in[31], costab01);
- t1 = in[15] + in[16]; t17 = MPC_DCT32_MUL(in[15] - in[16], costab31);
-
- t41 = t16 + t17;
- t59 = MPC_DCT32_MUL(t16 - t17, costab02);
- t33 = t0 + t1;
- t50 = MPC_DCT32_MUL(t0 - t1, costab02);
-
- t2 = in[ 7] + in[24]; t18 = MPC_DCT32_MUL(in[ 7] - in[24], costab15);
- t3 = in[ 8] + in[23]; t19 = MPC_DCT32_MUL(in[ 8] - in[23], costab17);
-
- t42 = t18 + t19;
- t60 = MPC_DCT32_MUL(t18 - t19, costab30);
- t34 = t2 + t3;
- t51 = MPC_DCT32_MUL(t2 - t3, costab30);
-
- t4 = in[ 3] + in[28]; t20 = MPC_DCT32_MUL(in[ 3] - in[28], costab07);
- t5 = in[12] + in[19]; t21 = MPC_DCT32_MUL(in[12] - in[19], costab25);
-
- t43 = t20 + t21;
- t61 = MPC_DCT32_MUL(t20 - t21, costab14);
- t35 = t4 + t5;
- t52 = MPC_DCT32_MUL(t4 - t5, costab14);
-
- t6 = in[ 4] + in[27]; t22 = MPC_DCT32_MUL(in[ 4] - in[27], costab09);
- t7 = in[11] + in[20]; t23 = MPC_DCT32_MUL(in[11] - in[20], costab23);
-
- t44 = t22 + t23;
- t62 = MPC_DCT32_MUL(t22 - t23, costab18);
- t36 = t6 + t7;
- t53 = MPC_DCT32_MUL(t6 - t7, costab18);
-
- t8 = in[ 1] + in[30]; t24 = MPC_DCT32_MUL(in[ 1] - in[30], costab03);
- t9 = in[14] + in[17]; t25 = MPC_DCT32_MUL(in[14] - in[17], costab29);
-
- t45 = t24 + t25;
- t63 = MPC_DCT32_MUL(t24 - t25, costab06);
- t37 = t8 + t9;
- t54 = MPC_DCT32_MUL(t8 - t9, costab06);
-
- t10 = in[ 6] + in[25]; t26 = MPC_DCT32_MUL(in[ 6] - in[25], costab13);
- t11 = in[ 9] + in[22]; t27 = MPC_DCT32_MUL(in[ 9] - in[22], costab19);
-
- t46 = t26 + t27;
- t64 = MPC_DCT32_MUL(t26 - t27, costab26);
- t38 = t10 + t11;
- t55 = MPC_DCT32_MUL(t10 - t11, costab26);
-
- t12 = in[ 2] + in[29]; t28 = MPC_DCT32_MUL(in[ 2] - in[29], costab05);
- t13 = in[13] + in[18]; t29 = MPC_DCT32_MUL(in[13] - in[18], costab27);
-
- t47 = t28 + t29;
- t65 = MPC_DCT32_MUL(t28 - t29, costab10);
- t39 = t12 + t13;
- t56 = MPC_DCT32_MUL(t12 - t13, costab10);
-
- t14 = in[ 5] + in[26]; t30 = MPC_DCT32_MUL(in[ 5] - in[26], costab11);
- t15 = in[10] + in[21]; t31 = MPC_DCT32_MUL(in[10] - in[21], costab21);
-
- t48 = t30 + t31;
- t66 = MPC_DCT32_MUL(t30 - t31, costab22);
- t40 = t14 + t15;
- t57 = MPC_DCT32_MUL(t14 - t15, costab22);
-
- t69 = t33 + t34; t89 = MPC_DCT32_MUL(t33 - t34, costab04);
- t70 = t35 + t36; t90 = MPC_DCT32_MUL(t35 - t36, costab28);
- t71 = t37 + t38; t91 = MPC_DCT32_MUL(t37 - t38, costab12);
- t72 = t39 + t40; t92 = MPC_DCT32_MUL(t39 - t40, costab20);
- t73 = t41 + t42; t94 = MPC_DCT32_MUL(t41 - t42, costab04);
- t74 = t43 + t44; t95 = MPC_DCT32_MUL(t43 - t44, costab28);
- t75 = t45 + t46; t96 = MPC_DCT32_MUL(t45 - t46, costab12);
- t76 = t47 + t48; t97 = MPC_DCT32_MUL(t47 - t48, costab20);
-
- t78 = t50 + t51; t100 = MPC_DCT32_MUL(t50 - t51, costab04);
- t79 = t52 + t53; t101 = MPC_DCT32_MUL(t52 - t53, costab28);
- t80 = t54 + t55; t102 = MPC_DCT32_MUL(t54 - t55, costab12);
- t81 = t56 + t57; t103 = MPC_DCT32_MUL(t56 - t57, costab20);
-
- t83 = t59 + t60; t106 = MPC_DCT32_MUL(t59 - t60, costab04);
- t84 = t61 + t62; t107 = MPC_DCT32_MUL(t61 - t62, costab28);
- t85 = t63 + t64; t108 = MPC_DCT32_MUL(t63 - t64, costab12);
- t86 = t65 + t66; t109 = MPC_DCT32_MUL(t65 - t66, costab20);
-
- t113 = t69 + t70;
- t114 = t71 + t72;
-
- /* 0 */ v[48] = -MPC_DCT32_SHIFT(t113 + t114);
- /* 16 */ v[32] = -(v[ 0] = MPC_DCT32_SHIFT(MPC_DCT32_MUL(t113 - t114, costab16)));
-
- t115 = t73 + t74;
- t116 = t75 + t76;
-
- t32 = t115 + t116;
-
- /* 1 */ v[49] = v[47] = -MPC_DCT32_SHIFT(t32);
-
- t118 = t78 + t79;
- t119 = t80 + t81;
-
- t58 = t118 + t119;
-
- /* 2 */ v[50] = v[46] = -MPC_DCT32_SHIFT(t58);
-
- t121 = t83 + t84;
- t122 = t85 + t86;
-
- t67 = t121 + t122;
-
- t49 = (t67 * 2) - t32;
-
- /* 3 */ v[51] = v[45] = -MPC_DCT32_SHIFT(t49);
-
- t125 = t89 + t90;
- t126 = t91 + t92;
-
- t93 = t125 + t126;
-
- /* 4 */ v[52] = v[44] = -MPC_DCT32_SHIFT(t93);
-
- t128 = t94 + t95;
- t129 = t96 + t97;
-
- t98 = t128 + t129;
-
- t68 = (t98 * 2) - t49;
-
- /* 5 */ v[53] = v[43] = -MPC_DCT32_SHIFT(t68);
-
- t132 = t100 + t101;
- t133 = t102 + t103;
-
- t104 = t132 + t133;
-
- t82 = (t104 * 2) - t58;
-
- /* 6 */ v[54] = v[42] = -MPC_DCT32_SHIFT(t82);
-
- t136 = t106 + t107;
- t137 = t108 + t109;
-
- t110 = t136 + t137;
-
- t87 = (t110 * 2) - t67;
-
- t77 = (t87 * 2) - t68;
-
- /* 7 */ v[55] = v[41] = -MPC_DCT32_SHIFT(t77);
-
- t141 = MPC_DCT32_MUL(t69 - t70, costab08);
- t142 = MPC_DCT32_MUL(t71 - t72, costab24);
- t143 = t141 + t142;
-
- /* 8 */ v[56] = v[40] = -MPC_DCT32_SHIFT(t143);
- /* 24 */ v[24] = -(v[ 8] = MPC_DCT32_SHIFT((MPC_DCT32_MUL(t141 - t142, costab16) * 2) - t143));
-
- t144 = MPC_DCT32_MUL(t73 - t74, costab08);
- t145 = MPC_DCT32_MUL(t75 - t76, costab24);
- t146 = t144 + t145;
-
- t88 = (t146 * 2) - t77;
-
- /* 9 */ v[57] = v[39] = -MPC_DCT32_SHIFT(t88);
-
- t148 = MPC_DCT32_MUL(t78 - t79, costab08);
- t149 = MPC_DCT32_MUL(t80 - t81, costab24);
- t150 = t148 + t149;
-
- t105 = (t150 * 2) - t82;
-
- /* 10 */ v[58] = v[38] = -MPC_DCT32_SHIFT(t105);
-
- t152 = MPC_DCT32_MUL(t83 - t84, costab08);
- t153 = MPC_DCT32_MUL(t85 - t86, costab24);
- t154 = t152 + t153;
-
- t111 = (t154 * 2) - t87;
-
- t99 = (t111 * 2) - t88;
-
- /* 11 */ v[59] = v[37] = -MPC_DCT32_SHIFT(t99);
-
- t157 = MPC_DCT32_MUL(t89 - t90, costab08);
- t158 = MPC_DCT32_MUL(t91 - t92, costab24);
- t159 = t157 + t158;
-
- t127 = (t159 * 2) - t93;
-
- /* 12 */ v[60] = v[36] = -MPC_DCT32_SHIFT(t127);
-
- t160 = (MPC_DCT32_MUL(t125 - t126, costab16) * 2) - t127;
-
- /* 20 */ v[28] = -(v[ 4] = MPC_DCT32_SHIFT(t160));
- /* 28 */ v[20] = -(v[12] = MPC_DCT32_SHIFT((((MPC_DCT32_MUL(t157 - t158, costab16) * 2) - t159) * 2) - t160));
-
- t161 = MPC_DCT32_MUL(t94 - t95, costab08);
- t162 = MPC_DCT32_MUL(t96 - t97, costab24);
- t163 = t161 + t162;
-
- t130 = (t163 * 2) - t98;
-
- t112 = (t130 * 2) - t99;
-
- /* 13 */ v[61] = v[35] = -MPC_DCT32_SHIFT(t112);
-
- t164 = (MPC_DCT32_MUL(t128 - t129, costab16) * 2) - t130;
-
- t166 = MPC_DCT32_MUL(t100 - t101, costab08);
- t167 = MPC_DCT32_MUL(t102 - t103, costab24);
- t168 = t166 + t167;
-
- t134 = (t168 * 2) - t104;
-
- t120 = (t134 * 2) - t105;
-
- /* 14 */ v[62] = v[34] = -MPC_DCT32_SHIFT(t120);
-
- t135 = (MPC_DCT32_MUL(t118 - t119, costab16) * 2) - t120;
-
- /* 18 */ v[30] = -(v[ 2] = MPC_DCT32_SHIFT(t135));
-
- t169 = (MPC_DCT32_MUL(t132 - t133, costab16) * 2) - t134;
-
- t151 = (t169 * 2) - t135;
-
- /* 22 */ v[26] = -(v[ 6] = MPC_DCT32_SHIFT(t151));
-
- t170 = (((MPC_DCT32_MUL(t148 - t149, costab16) * 2) - t150) * 2) - t151;
-
- /* 26 */ v[22] = -(v[10] = MPC_DCT32_SHIFT(t170));
- /* 30 */ v[18] = -(v[14] = MPC_DCT32_SHIFT((((((MPC_DCT32_MUL(t166 - t167, costab16) * 2) - t168) * 2) - t169) * 2) - t170));
-
- t171 = MPC_DCT32_MUL(t106 - t107, costab08);
- t172 = MPC_DCT32_MUL(t108 - t109, costab24);
- t173 = t171 + t172;
-
- t138 = (t173 * 2) - t110;
-
- t123 = (t138 * 2) - t111;
-
- t139 = (MPC_DCT32_MUL(t121 - t122, costab16) * 2) - t123;
-
- t117 = (t123 * 2) - t112;
-
- /* 15 */ v[63] = v[33] =-MPC_DCT32_SHIFT(t117);
-
- t124 = (MPC_DCT32_MUL(t115 - t116, costab16) * 2) - t117;
-
- /* 17 */ v[31] = -(v[ 1] = MPC_DCT32_SHIFT(t124));
-
- t131 = (t139 * 2) - t124;
-
- /* 19 */ v[29] = -(v[ 3] = MPC_DCT32_SHIFT(t131));
-
- t140 = (t164 * 2) - t131;
-
- /* 21 */ v[27] = -(v[ 5] = MPC_DCT32_SHIFT(t140));
-
- t174 = (MPC_DCT32_MUL(t136 - t137, costab16) * 2) - t138;
-
- t155 = (t174 * 2) - t139;
-
- t147 = (t155 * 2) - t140;
-
- /* 23 */ v[25] = -(v[ 7] = MPC_DCT32_SHIFT(t147));
-
- t156 = (((MPC_DCT32_MUL(t144 - t145, costab16) * 2) - t146) * 2) - t147;
-
- /* 25 */ v[23] = -(v[ 9] = MPC_DCT32_SHIFT(t156));
-
- t175 = (((MPC_DCT32_MUL(t152 - t153, costab16) * 2) - t154) * 2) - t155;
-
- t165 = (t175 * 2) - t156;
-
- /* 27 */ v[21] = -(v[11] = MPC_DCT32_SHIFT(t165));
-
- t176 = (((((MPC_DCT32_MUL(t161 - t162, costab16) * 2) - t163) * 2) - t164) * 2) - t165;
-
- /* 29 */ v[19] = -(v[13] = MPC_DCT32_SHIFT(t176));
- /* 31 */ v[17] = -(v[15] = MPC_DCT32_SHIFT((((((((MPC_DCT32_MUL(t171 - t172, costab16) * 2) - t173) * 2) - t174) * 2) - t175) * 2) - t176));
-}
-
-#if defined(CPU_ARM) || defined(CPU_COLDFIRE)
-extern void
-mpc_decoder_windowing_D(MPC_SAMPLE_FORMAT * Data,
- const MPC_SAMPLE_FORMAT * V,
- const MPC_SAMPLE_FORMAT * D);
-#else
-static void
-mpc_decoder_windowing_D(MPC_SAMPLE_FORMAT * Data,
- const MPC_SAMPLE_FORMAT * V,
- const MPC_SAMPLE_FORMAT * D)
-{
- mpc_int32_t k;
-
- // 64=64x64-multiply (FIXED_POINT) or float=float*float (!FIXED_POINT) in C
- for ( k = 0; k < 32; k++, D += 16, V++ )
- {
- *Data = MPC_MULTIPLY_EX(V[ 0],D[ 0],30) + MPC_MULTIPLY_EX(V[ 96],D[ 1],30)
- + MPC_MULTIPLY_EX(V[128],D[ 2],30) + MPC_MULTIPLY_EX(V[224],D[ 3],30)
- + MPC_MULTIPLY_EX(V[256],D[ 4],30) + MPC_MULTIPLY_EX(V[352],D[ 5],30)
- + MPC_MULTIPLY_EX(V[384],D[ 6],30) + MPC_MULTIPLY_EX(V[480],D[ 7],30)
- + MPC_MULTIPLY_EX(V[512],D[ 8],30) + MPC_MULTIPLY_EX(V[608],D[ 9],30)
- + MPC_MULTIPLY_EX(V[640],D[10],30) + MPC_MULTIPLY_EX(V[736],D[11],30)
- + MPC_MULTIPLY_EX(V[768],D[12],30) + MPC_MULTIPLY_EX(V[864],D[13],30)
- + MPC_MULTIPLY_EX(V[896],D[14],30) + MPC_MULTIPLY_EX(V[992],D[15],30);
- Data += 1;
- // total: 16 muls, 15 adds, 16 shifts
- }
-}
-#endif /* CPU_ARM || CPU_COLDFIRE */
-
-static void
-mpc_full_synthesis_filter(MPC_SAMPLE_FORMAT *OutData, MPC_SAMPLE_FORMAT *V,
- const MPC_SAMPLE_FORMAT *Y) ICODE_ATTR_MPC_LARGE_IRAM;
-static void
-mpc_full_synthesis_filter(MPC_SAMPLE_FORMAT *OutData, MPC_SAMPLE_FORMAT *V,
- const MPC_SAMPLE_FORMAT *Y)
-{
- mpc_uint32_t n;
-
- if (NULL != OutData)
- {
- for ( n = 0; n < 36; n++, Y += 32, OutData += 32 )
- {
- V -= 64;
- mpc_dct32(Y, V);
- mpc_decoder_windowing_D( OutData, V, Di_opt );
- }
- }
-}
-
-void
-mpc_decoder_synthese_filter_float(mpc_decoder *d, MPC_SAMPLE_FORMAT *OutData,
- int num_channels)
-{
- (void)num_channels;
-
- /********* left channel ********/
- memmove(d->V_L + MPC_V_MEM, d->V_L, 960 * sizeof(MPC_SAMPLE_FORMAT) );
- mpc_full_synthesis_filter(OutData,
- (MPC_SAMPLE_FORMAT *)(d->V_L + MPC_V_MEM),
- (MPC_SAMPLE_FORMAT *)(d->Y_L));
-
- /******** right channel ********/
- memmove(d->V_R + MPC_V_MEM, d->V_R, 960 * sizeof(MPC_SAMPLE_FORMAT) );
- mpc_full_synthesis_filter((OutData == NULL ? NULL : OutData + MPC_FRAME_LENGTH),
- (MPC_SAMPLE_FORMAT *)(d->V_R + MPC_V_MEM),
- (MPC_SAMPLE_FORMAT *)(d->Y_R));
-}
-
-/*******************************************/
-/* */
-/* dithered synthesis */
-/* */
-/*******************************************/
-
-static const unsigned char Parity [256] = { // parity
- 0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
- 1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,
- 1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,
- 0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
- 1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,
- 0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
- 0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,
- 1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0
-};
-
-/*
- * This is a simple random number generator with good quality for audio purposes.
- * It consists of two polycounters with opposite rotation direction and different
- * periods. The periods are coprime, so the total period is the product of both.
- *
- * -------------------------------------------------------------------------------------------------
- * +-> |31:30:29:28:27:26:25:24:23:22:21:20:19:18:17:16:15:14:13:12:11:10: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0|
- * | -------------------------------------------------------------------------------------------------
- * | | | | | | |
- * | +--+--+--+-XOR-+--------+
- * | |
- * +--------------------------------------------------------------------------------------+
- *
- * -------------------------------------------------------------------------------------------------
- * |31:30:29:28:27:26:25:24:23:22:21:20:19:18:17:16:15:14:13:12:11:10: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0| <-+
- * ------------------------------------------------------------------------------------------------- |
- * | | | | |
- * +--+----XOR----+--+ |
- * | |
- * +----------------------------------------------------------------------------------------+
- *
- *
- * The first has an period of 3*5*17*257*65537, the second of 7*47*73*178481,
- * which gives a period of 18.410.713.077.675.721.215. The result is the
- * XORed values of both generators.
- */
-mpc_uint32_t
-mpc_random_int(mpc_decoder *d)
-{
-#if 1
- mpc_uint32_t t1, t2, t3, t4;
-
- t3 = t1 = d->__r1; t4 = t2 = d->__r2; // Parity calculation is done via table lookup, this is also available
- t1 &= 0xF5; t2 >>= 25; // on CPUs without parity, can be implemented in C and avoid unpredictable
- t1 = Parity [t1]; t2 &= 0x63; // jumps and slow rotate through the carry flag operations.
- t1 <<= 31; t2 = Parity [t2];
-
- return (d->__r1 = (t3 >> 1) | t1 ) ^ (d->__r2 = (t4 + t4) | t2 );
-#else
- return (d->__r1 = (d->__r1 >> 1) | ((mpc_uint32_t)Parity [d->__r1 & 0xF5] << 31) ) ^
- (d->__r2 = (d->__r2 << 1) | (mpc_uint32_t)Parity [(d->__r2 >> 25) & 0x63] );
-#endif
-}