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FFmpeg/libavcodec/mips/ac3dsp_mips.c

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  1. /*

  2.  * Copyright (c) 2012

  3.  *      MIPS Technologies, Inc., California.

  4.  *

  5.  * Redistribution and use in source and binary forms, with or without

  6.  * modification, are permitted provided that the following conditions

  7.  * are met:

  8.  * 1. Redistributions of source code must retain the above copyright

  9.  *    notice, this list of conditions and the following disclaimer.

  10.  * 2. Redistributions in binary form must reproduce the above copyright

  11.  *    notice, this list of conditions and the following disclaimer in the

  12.  *    documentation and/or other materials provided with the distribution.

  13.  * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its

  14.  *    contributors may be used to endorse or promote products derived from

  15.  *    this software without specific prior written permission.

  16.  *

  17.  * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND

  18.  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  19.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  20.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE

  21.  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  22.  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

  23.  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  24.  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

  25.  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

  26.  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

  27.  * SUCH DAMAGE.

  28.  *

  29.  * Author:  Branimir Vasic (bvasic@mips.com)

  30.  *

  31.  * Various AC-3 DSP Utils optimized for MIPS

  32.  *

  33.  * This file is part of FFmpeg.

  34.  *

  35.  * FFmpeg is free software; you can redistribute it and/or

  36.  * modify it under the terms of the GNU Lesser General Public

  37.  * License as published by the Free Software Foundation; either

  38.  * version 2.1 of the License, or (at your option) any later version.

  39.  *

  40.  * FFmpeg is distributed in the hope that it will be useful,

  41.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  42.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  43.  * Lesser General Public License for more details.

  44.  *

  45.  * You should have received a copy of the GNU Lesser General Public

  46.  * License along with FFmpeg; if not, write to the Free Software

  47.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  48.  */

  49. 

  50. /**

  51.  * @file

  52.  * Reference: libavcodec/ac3dsp.c

  53.  */

  54. 

  55. #include "config.h"

  56. #include "libavcodec/ac3dsp.h"

  57. #include "libavcodec/ac3.h"

  58. 

  59. 

  60. #if HAVE_INLINE_ASM

  61. #if HAVE_MIPSDSPR1

  62. static void ac3_bit_alloc_calc_bap_mips(int16_t *mask, int16_t *psd,

  63.                                         int start, int end,

  64.                                         int snr_offset, int floor,

  65.                                         const uint8_t *bap_tab, uint8_t *bap)

  66. {

  67.     int band, band_end, cond;

  68.     int m, address1, address2;

  69.     int16_t *psd1, *psd_end;

  70.     uint8_t *bap1;

  71. 

  72.     if (snr_offset == -960) {

  73.         memset(bap, 0, AC3_MAX_COEFS);

  74.         return;

  75.     }

  76. 

  77.     psd1 = &psd[start];

  78.     bap1 = &bap[start];

  79.     band = ff_ac3_bin_to_band_tab[start];

  80. 

  81.     do {

  82.         m = (FFMAX(mask[band] - snr_offset - floor, 0) & 0x1FE0) + floor;

  83.         band_end = ff_ac3_band_start_tab[++band];

  84.         band_end = FFMIN(band_end, end);

  85.         psd_end = psd + band_end - 1;

  86. 

  87.         __asm__ volatile (

  88.             "slt        %[cond],        %[psd1],        %[psd_end]  \n\t"

  89.             "beqz       %[cond],        1f                          \n\t"

  90.             "2:                                                     \n\t"

  91.             "lh         %[address1],    0(%[psd1])                  \n\t"

  92.             "lh         %[address2],    2(%[psd1])                  \n\t"

  93.             "addiu      %[psd1],        %[psd1],        4           \n\t"

  94.             "subu       %[address1],    %[address1],    %[m]        \n\t"

  95.             "sra        %[address1],    %[address1],    5           \n\t"

  96.             "addiu      %[address1],    %[address1],    -32         \n\t"

  97.             "shll_s.w   %[address1],    %[address1],    26          \n\t"

  98.             "subu       %[address2],    %[address2],    %[m]        \n\t"

  99.             "sra        %[address2],    %[address2],    5           \n\t"

  100.             "sra        %[address1],    %[address1],    26          \n\t"

  101.             "addiu      %[address1],    %[address1],    32          \n\t"

  102.             "lbux       %[address1],    %[address1](%[bap_tab])     \n\t"

  103.             "addiu      %[address2],    %[address2],    -32         \n\t"

  104.             "shll_s.w   %[address2],    %[address2],    26          \n\t"

  105.             "sb         %[address1],    0(%[bap1])                  \n\t"

  106.             "slt        %[cond],        %[psd1],        %[psd_end]  \n\t"

  107.             "sra        %[address2],    %[address2],    26          \n\t"

  108.             "addiu      %[address2],    %[address2],    32          \n\t"

  109.             "lbux       %[address2],    %[address2](%[bap_tab])     \n\t"

  110.             "sb         %[address2],    1(%[bap1])                  \n\t"

  111.             "addiu      %[bap1],        %[bap1],        2           \n\t"

  112.             "bnez       %[cond],        2b                          \n\t"

  113.             "addiu      %[psd_end],     %[psd_end],     2           \n\t"

  114.             "slt        %[cond],        %[psd1],        %[psd_end]  \n\t"

  115.             "beqz       %[cond],        3f                          \n\t"

  116.             "1:                                                     \n\t"

  117.             "lh         %[address1],    0(%[psd1])                  \n\t"

  118.             "addiu      %[psd1],        %[psd1],        2           \n\t"

  119.             "subu       %[address1],    %[address1],    %[m]        \n\t"

  120.             "sra        %[address1],    %[address1],    5           \n\t"

  121.             "addiu      %[address1],    %[address1],    -32         \n\t"

  122.             "shll_s.w   %[address1],    %[address1],    26          \n\t"

  123.             "sra        %[address1],    %[address1],    26          \n\t"

  124.             "addiu      %[address1],    %[address1],    32          \n\t"

  125.             "lbux       %[address1],    %[address1](%[bap_tab])     \n\t"

  126.             "sb         %[address1],    0(%[bap1])                  \n\t"

  127.             "addiu      %[bap1],        %[bap1],        1           \n\t"

  128.             "3:                                                     \n\t"

  129. 

  130.             : [address1]"=&r"(address1), [address2]"=&r"(address2),

  131.               [cond]"=&r"(cond), [bap1]"+r"(bap1),

  132.               [psd1]"+r"(psd1), [psd_end]"+r"(psd_end)

  133.             : [m]"r"(m), [bap_tab]"r"(bap_tab)

  134.             : "memory"

  135.         );

  136.     } while (end > band_end);

  137. }

  138. 

  139. static void ac3_update_bap_counts_mips(uint16_t mant_cnt[16], uint8_t *bap,

  140.                                        int len)

  141. {

  142.     int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;

  143. 

  144.     __asm__ volatile (

  145.         "andi   %[temp3],   %[len],         3               \n\t"

  146.         "addu   %[temp2],   %[bap],         %[len]          \n\t"

  147.         "addu   %[temp4],   %[bap],         %[temp3]        \n\t"

  148.         "beq    %[temp2],   %[temp4],       4f              \n\t"

  149.         "1:                                                 \n\t"

  150.         "lbu    %[temp0],   -1(%[temp2])                    \n\t"

  151.         "lbu    %[temp5],   -2(%[temp2])                    \n\t"

  152.         "lbu    %[temp6],   -3(%[temp2])                    \n\t"

  153.         "sll    %[temp0],   %[temp0],       1               \n\t"

  154.         "addu   %[temp0],   %[mant_cnt],    %[temp0]        \n\t"

  155.         "sll    %[temp5],   %[temp5],       1               \n\t"

  156.         "addu   %[temp5],   %[mant_cnt],    %[temp5]        \n\t"

  157.         "lhu    %[temp1],   0(%[temp0])                     \n\t"

  158.         "sll    %[temp6],   %[temp6],       1               \n\t"

  159.         "addu   %[temp6],   %[mant_cnt],    %[temp6]        \n\t"

  160.         "addiu  %[temp1],   %[temp1],       1               \n\t"

  161.         "sh     %[temp1],   0(%[temp0])                     \n\t"

  162.         "lhu    %[temp1],   0(%[temp5])                     \n\t"

  163.         "lbu    %[temp7],   -4(%[temp2])                    \n\t"

  164.         "addiu  %[temp2],   %[temp2],       -4              \n\t"

  165.         "addiu  %[temp1],   %[temp1],       1               \n\t"

  166.         "sh     %[temp1],   0(%[temp5])                     \n\t"

  167.         "lhu    %[temp1],   0(%[temp6])                     \n\t"

  168.         "sll    %[temp7],   %[temp7],       1               \n\t"

  169.         "addu   %[temp7],   %[mant_cnt],    %[temp7]        \n\t"

  170.         "addiu  %[temp1],   %[temp1],1                      \n\t"

  171.         "sh     %[temp1],   0(%[temp6])                     \n\t"

  172.         "lhu    %[temp1],   0(%[temp7])                     \n\t"

  173.         "addiu  %[temp1],   %[temp1],       1               \n\t"

  174.         "sh     %[temp1],   0(%[temp7])                     \n\t"

  175.         "bne    %[temp2],   %[temp4],       1b              \n\t"

  176.         "4:                                                 \n\t"

  177.         "beqz   %[temp3],   2f                              \n\t"

  178.         "3:                                                 \n\t"

  179.         "addiu  %[temp3],   %[temp3],       -1              \n\t"

  180.         "lbu    %[temp0],   -1(%[temp2])                    \n\t"

  181.         "addiu  %[temp2],   %[temp2],       -1              \n\t"

  182.         "sll    %[temp0],   %[temp0],       1               \n\t"

  183.         "addu   %[temp0],   %[mant_cnt],    %[temp0]        \n\t"

  184.         "lhu    %[temp1],   0(%[temp0])                     \n\t"

  185.         "addiu  %[temp1],   %[temp1],       1               \n\t"

  186.         "sh     %[temp1],   0(%[temp0])                     \n\t"

  187.         "bgtz   %[temp3],   3b                              \n\t"

  188.         "2:                                                 \n\t"

  189. 

  190.         : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),

  191.           [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),

  192.           [temp4] "=&r" (temp4), [temp5] "=&r" (temp5),

  193.           [temp6] "=&r" (temp6), [temp7] "=&r" (temp7)

  194.         : [len] "r" (len), [bap] "r" (bap),

  195.           [mant_cnt] "r" (mant_cnt)

  196.         : "memory"

  197.     );

  198. }

  199. #endif

  200. 

  201. #if HAVE_MIPSFPU

  202. static void float_to_fixed24_mips(int32_t *dst, const float *src, unsigned int len)

  203. {

  204.     const float scale = 1 << 24;

  205.     float src0, src1, src2, src3, src4, src5, src6, src7;

  206.     int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;

  207. 

  208.     do {

  209.         __asm__ volatile (

  210.             "lwc1       %[src0],    0(%[src])               \n\t"

  211.             "lwc1       %[src1],    4(%[src])               \n\t"

  212.             "lwc1       %[src2],    8(%[src])               \n\t"

  213.             "lwc1       %[src3],    12(%[src])              \n\t"

  214.             "lwc1       %[src4],    16(%[src])              \n\t"

  215.             "lwc1       %[src5],    20(%[src])              \n\t"

  216.             "lwc1       %[src6],    24(%[src])              \n\t"

  217.             "lwc1       %[src7],    28(%[src])              \n\t"

  218.             "mul.s      %[src0],    %[src0],    %[scale]    \n\t"

  219.             "mul.s      %[src1],    %[src1],    %[scale]    \n\t"

  220.             "mul.s      %[src2],    %[src2],    %[scale]    \n\t"

  221.             "mul.s      %[src3],    %[src3],    %[scale]    \n\t"

  222.             "mul.s      %[src4],    %[src4],    %[scale]    \n\t"

  223.             "mul.s      %[src5],    %[src5],    %[scale]    \n\t"

  224.             "mul.s      %[src6],    %[src6],    %[scale]    \n\t"

  225.             "mul.s      %[src7],    %[src7],    %[scale]    \n\t"

  226.             "cvt.w.s    %[src0],    %[src0]                 \n\t"

  227.             "cvt.w.s    %[src1],    %[src1]                 \n\t"

  228.             "cvt.w.s    %[src2],    %[src2]                 \n\t"

  229.             "cvt.w.s    %[src3],    %[src3]                 \n\t"

  230.             "cvt.w.s    %[src4],    %[src4]                 \n\t"

  231.             "cvt.w.s    %[src5],    %[src5]                 \n\t"

  232.             "cvt.w.s    %[src6],    %[src6]                 \n\t"

  233.             "cvt.w.s    %[src7],    %[src7]                 \n\t"

  234.             "mfc1       %[temp0],   %[src0]                 \n\t"

  235.             "mfc1       %[temp1],   %[src1]                 \n\t"

  236.             "mfc1       %[temp2],   %[src2]                 \n\t"

  237.             "mfc1       %[temp3],   %[src3]                 \n\t"

  238.             "mfc1       %[temp4],   %[src4]                 \n\t"

  239.             "mfc1       %[temp5],   %[src5]                 \n\t"

  240.             "mfc1       %[temp6],   %[src6]                 \n\t"

  241.             "mfc1       %[temp7],   %[src7]                 \n\t"

  242.             "sw         %[temp0],   0(%[dst])               \n\t"

  243.             "sw         %[temp1],   4(%[dst])               \n\t"

  244.             "sw         %[temp2],   8(%[dst])               \n\t"

  245.             "sw         %[temp3],   12(%[dst])              \n\t"

  246.             "sw         %[temp4],   16(%[dst])              \n\t"

  247.             "sw         %[temp5],   20(%[dst])              \n\t"

  248.             "sw         %[temp6],   24(%[dst])              \n\t"

  249.             "sw         %[temp7],   28(%[dst])              \n\t"

  250. 

  251.             : [dst] "+r" (dst), [src] "+r" (src),

  252.               [src0] "=&f" (src0), [src1] "=&f" (src1),

  253.               [src2] "=&f" (src2), [src3] "=&f" (src3),

  254.               [src4] "=&f" (src4), [src5] "=&f" (src5),

  255.               [src6] "=&f" (src6), [src7] "=&f" (src7),

  256.               [temp0] "=r" (temp0), [temp1] "=r" (temp1),

  257.               [temp2] "=r" (temp2), [temp3] "=r" (temp3),

  258.               [temp4] "=r" (temp4), [temp5] "=r" (temp5),

  259.               [temp6] "=r" (temp6), [temp7] "=r" (temp7)

  260.             : [scale] "f" (scale)

  261.             : "memory"

  262.         );

  263.         src = src + 8;

  264.         dst = dst + 8;

  265.         len -= 8;

  266.     } while (len > 0);

  267. }

  268. 

  269. static void ac3_downmix_mips(float (*samples)[256], float (*matrix)[2], int out_ch, int in_ch, int len)

  270. {

  271.     int i, j;

  272.     float v0, v1, v2, v3;

  273.     float v4, v5, v6, v7;

  274.     float samples0, samples1, samples2, samples3, matrix_j, matrix_j2;

  275.     float *samples_p,*matrix_p;

  276.     if (out_ch == 2) {

  277.         for (i = 0; i < len; i += 4) {

  278.             v0 = v1 = v2 = v3 = 0.0f;

  279.             v4 = v5 = v6 = v7 = 0.0f;

  280.             samples_p = &samples[0][i];

  281.             matrix_p = &matrix[0][0];

  282.             __asm__ volatile (

  283.                 "move   %[j],           $zero                               \n\t"

  284.                 "1:                                                         \n\t"

  285.                 "lwc1   %[matrix_j],    0(%[matrix_p])                      \n\t"

  286.                 "lwc1   %[matrix_j2],   4(%[matrix_p])                      \n\t"

  287.                 "lwc1   %[samples0],    0(%[samples_p])                     \n\t"

  288.                 "lwc1   %[samples1],    4(%[samples_p])                     \n\t"

  289.                 "lwc1   %[samples2],    8(%[samples_p])                     \n\t"

  290.                 "lwc1   %[samples3],    12(%[samples_p])                    \n\t"

  291.                 "addiu  %[matrix_p],    8                                   \n\t"

  292.                 "madd.s %[v0],          %[v0],  %[samples0],    %[matrix_j] \n\t"

  293.                 "madd.s %[v1],          %[v1],  %[samples1],    %[matrix_j] \n\t"

  294.                 "madd.s %[v2],          %[v2],  %[samples2],    %[matrix_j] \n\t"

  295.                 "madd.s %[v3],          %[v3],  %[samples3],    %[matrix_j] \n\t"

  296.                 "madd.s %[v4],          %[v4],  %[samples0],    %[matrix_j2]\n\t"

  297.                 "madd.s %[v5],          %[v5],  %[samples1],    %[matrix_j2]\n\t"

  298.                 "madd.s %[v6],          %[v6],  %[samples2],    %[matrix_j2]\n\t"

  299.                 "madd.s %[v7],          %[v7],  %[samples3],    %[matrix_j2]\n\t"

  300.                 "addiu  %[j],           1                                   \n\t"

  301.                 "addiu  %[samples_p],   1024                                \n\t"

  302.                 "bne    %[j],           %[in_ch],   1b                      \n\t"

  303.                 :[samples0]"=&f"(samples0), [samples1]"=&f"(samples1),

  304.                  [samples2]"=&f"(samples2), [samples3]"=&f"(samples3),

  305.                  [samples_p]"+r"(samples_p), [matrix_j]"=&f"(matrix_j),

  306.                  [matrix_p]"+r"(matrix_p), [v0]"+f"(v0), [v1]"+f"(v1),

  307.                  [v2]"+f"(v2), [v3]"+f"(v3), [v4]"+f"(v4), [v5]"+f"(v5),

  308.                  [v6]"+f"(v6), [v7]"+f"(v7),[j]"=&r"(j), [matrix_j2]"=&f"(matrix_j2)

  309.                 :[in_ch]"r"(in_ch)

  310.                 :"memory"

  311.             );

  312.             samples[0][i  ] = v0;

  313.             samples[0][i+1] = v1;

  314.             samples[0][i+2] = v2;

  315.             samples[0][i+3] = v3;

  316.             samples[1][i  ] = v4;

  317.             samples[1][i+1] = v5;

  318.             samples[1][i+2] = v6;

  319.             samples[1][i+3] = v7;

  320.         }

  321.     } else if (out_ch == 1) {

  322.         for (i = 0; i < len; i += 4) {

  323.             v0 = v1 = v2 = v3 = 0.0f;

  324.             samples_p = &samples[0][i];

  325.             matrix_p = &matrix[0][0];

  326.             __asm__ volatile (

  327.                 "move   %[j],           $zero                               \n\t"

  328.                 "1:                                                         \n\t"

  329.                 "lwc1   %[matrix_j],    0(%[matrix_p])                      \n\t"

  330.                 "lwc1   %[samples0],    0(%[samples_p])                     \n\t"

  331.                 "lwc1   %[samples1],    4(%[samples_p])                     \n\t"

  332.                 "lwc1   %[samples2],    8(%[samples_p])                     \n\t"

  333.                 "lwc1   %[samples3],    12(%[samples_p])                    \n\t"

  334.                 "addiu  %[matrix_p],    8                                   \n\t"

  335.                 "madd.s %[v0],          %[v0],  %[samples0],    %[matrix_j] \n\t"

  336.                 "madd.s %[v1],          %[v1],  %[samples1],    %[matrix_j] \n\t"

  337.                 "madd.s %[v2],          %[v2],  %[samples2],    %[matrix_j] \n\t"

  338.                 "madd.s %[v3],          %[v3],  %[samples3],    %[matrix_j] \n\t"

  339.                 "addiu  %[j],           1                                   \n\t"

  340.                 "addiu  %[samples_p],   1024                                \n\t"

  341.                 "bne    %[j],           %[in_ch],   1b                      \n\t"

  342.                 :[samples0]"=&f"(samples0), [samples1]"=&f"(samples1),

  343.                  [samples2]"=&f"(samples2), [samples3]"=&f"(samples3),

  344.                  [samples_p]"+r"(samples_p), [matrix_j]"=&f"(matrix_j),

  345.                  [matrix_p]"+r"(matrix_p), [v0]"+f"(v0), [v1]"+f"(v1),

  346.                  [v2]"+f"(v2), [v3]"+f"(v3), [j]"=&r"(j)

  347.                 :[in_ch]"r"(in_ch)

  348.                 :"memory"

  349.             );

  350.             samples[0][i  ] = v0;

  351.             samples[0][i+1] = v1;

  352.             samples[0][i+2] = v2;

  353.             samples[0][i+3] = v3;

  354.         }

  355.     }

  356. }

  357. #endif

  358. #endif /* HAVE_INLINE_ASM */

  359. 

  360. void ff_ac3dsp_init_mips(AC3DSPContext *c, int bit_exact) {

  361. #if HAVE_INLINE_ASM

  362. #if HAVE_MIPSDSPR1

  363.     c->bit_alloc_calc_bap = ac3_bit_alloc_calc_bap_mips;

  364.     c->update_bap_counts  = ac3_update_bap_counts_mips;

  365. #endif

  366. #if HAVE_MIPSFPU

  367.     c->float_to_fixed24 = float_to_fixed24_mips;

  368.     c->downmix          = ac3_downmix_mips;

  369. #endif

  370. #endif

  371. 

  372. }