FFmpeg: libavcodec/mips/fmtconvert

00001 /*
00002  * Format Conversion Utils for MIPS
00003  *
00004  * Copyright (c) 2012
00005  *      MIPS Technologies, Inc., California.
00006  *
00007  * Redistribution and use in source and binary forms, with or without
00008  * modification, are permitted provided that the following conditions
00009  * are met:
00010  * 1. Redistributions of source code must retain the above copyright
00011  *    notice, this list of conditions and the following disclaimer.
00012  * 2. Redistributions in binary form must reproduce the above copyright
00013  *    notice, this list of conditions and the following disclaimer in the
00014  *    documentation and/or other materials provided with the distribution.
00015  * 3. Neither the name of the MIPS Technologies, Inc., nor the names of is
00016  *    contributors may be used to endorse or promote products derived from
00017  *    this software without specific prior written permission.
00018  *
00019  * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
00020  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00021  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00022  * ARE DISCLAIMED.  IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
00023  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00024  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00025  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00026  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00027  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00028  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00029  * SUCH DAMAGE.
00030  *
00031  * Author:  Zoran Lukic (zoranl@mips.com)
00032  * Author:  Nedeljko Babic (nbabic@mips.com)
00033  *
00034  * This file is part of FFmpeg.
00035  *
00036  * FFmpeg is free software; you can redistribute it and/or
00037  * modify it under the terms of the GNU Lesser General Public
00038  * License as published by the Free Software Foundation; either
00039  * version 2.1 of the License, or (at your option) any later version.
00040  *
00041  * FFmpeg is distributed in the hope that it will be useful,
00042  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00043  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00044  * Lesser General Public License for more details.
00045  *
00046  * You should have received a copy of the GNU Lesser General Public
00047  * License along with FFmpeg; if not, write to the Free Software
00048  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00049  */
00050 #include "config.h"
00051 #include "libavcodec/avcodec.h"
00052 #include "libavcodec/fmtconvert.h"
00053 
00054 #if HAVE_MIPSDSPR1
00055 static void float_to_int16_mips(int16_t *dst, const float *src, long len)
00056 {
00057     const float *src_end = src + len;
00058     int ret0, ret1, ret2, ret3, ret4, ret5, ret6, ret7;
00059     float src0, src1, src2, src3, src4, src5, src6, src7;
00060 
00061     /*
00062      * loop is 8 times unrolled in assembler in order to achieve better performance
00063      */
00064     __asm__ volatile(
00065         "beq        %[len],  $zero,   fti16_end%=   \n\t"
00066         "fti16_lp%=:                                \n\t"
00067         "lwc1       %[src0], 0(%[src])              \n\t"
00068         "lwc1       %[src1], 4(%[src])              \n\t"
00069         "lwc1       %[src2], 8(%[src])              \n\t"
00070         "lwc1       %[src3], 12(%[src])             \n\t"
00071         "cvt.w.s    %[src0], %[src0]                \n\t"
00072         "cvt.w.s    %[src1], %[src1]                \n\t"
00073         "cvt.w.s    %[src2], %[src2]                \n\t"
00074         "cvt.w.s    %[src3], %[src3]                \n\t"
00075         "mfc1       %[ret0], %[src0]                \n\t"
00076         "mfc1       %[ret1], %[src1]                \n\t"
00077         "mfc1       %[ret2], %[src2]                \n\t"
00078         "mfc1       %[ret3], %[src3]                \n\t"
00079         "lwc1       %[src4], 16(%[src])             \n\t"
00080         "lwc1       %[src5], 20(%[src])             \n\t"
00081         "lwc1       %[src6], 24(%[src])             \n\t"
00082         "lwc1       %[src7], 28(%[src])             \n\t"
00083         "cvt.w.s    %[src4], %[src4]                \n\t"
00084         "cvt.w.s    %[src5], %[src5]                \n\t"
00085         "cvt.w.s    %[src6], %[src6]                \n\t"
00086         "cvt.w.s    %[src7], %[src7]                \n\t"
00087         "addiu      %[src],  32                     \n\t"
00088         "shll_s.w   %[ret0], %[ret0], 16            \n\t"
00089         "shll_s.w   %[ret1], %[ret1], 16            \n\t"
00090         "shll_s.w   %[ret2], %[ret2], 16            \n\t"
00091         "shll_s.w   %[ret3], %[ret3], 16            \n\t"
00092         "srl        %[ret0], %[ret0], 16            \n\t"
00093         "srl        %[ret1], %[ret1], 16            \n\t"
00094         "srl        %[ret2], %[ret2], 16            \n\t"
00095         "srl        %[ret3], %[ret3], 16            \n\t"
00096         "sh         %[ret0], 0(%[dst])              \n\t"
00097         "sh         %[ret1], 2(%[dst])              \n\t"
00098         "sh         %[ret2], 4(%[dst])              \n\t"
00099         "sh         %[ret3], 6(%[dst])              \n\t"
00100         "mfc1       %[ret4], %[src4]                \n\t"
00101         "mfc1       %[ret5], %[src5]                \n\t"
00102         "mfc1       %[ret6], %[src6]                \n\t"
00103         "mfc1       %[ret7], %[src7]                \n\t"
00104         "shll_s.w   %[ret4], %[ret4], 16            \n\t"
00105         "shll_s.w   %[ret5], %[ret5], 16            \n\t"
00106         "shll_s.w   %[ret6], %[ret6], 16            \n\t"
00107         "shll_s.w   %[ret7], %[ret7], 16            \n\t"
00108         "srl        %[ret4], %[ret4], 16            \n\t"
00109         "srl        %[ret5], %[ret5], 16            \n\t"
00110         "srl        %[ret6], %[ret6], 16            \n\t"
00111         "srl        %[ret7], %[ret7], 16            \n\t"
00112         "sh         %[ret4], 8(%[dst])              \n\t"
00113         "sh         %[ret5], 10(%[dst])             \n\t"
00114         "sh         %[ret6], 12(%[dst])             \n\t"
00115         "sh         %[ret7], 14(%[dst])             \n\t"
00116         "addiu      %[dst],  16                     \n\t"
00117         "bne        %[src],  %[src_end], fti16_lp%= \n\t"
00118         "fti16_end%=:                               \n\t"
00119         : [ret0]"=&r"(ret0), [ret1]"=&r"(ret1), [ret2]"=&r"(ret2), [ret3]"=&r"(ret3),
00120           [ret4]"=&r"(ret4), [ret5]"=&r"(ret5), [ret6]"=&r"(ret6), [ret7]"=&r"(ret7),
00121           [src0]"=&f"(src0), [src1]"=&f"(src1), [src2]"=&f"(src2), [src3]"=&f"(src3),
00122           [src4]"=&f"(src4), [src5]"=&f"(src5), [src6]"=&f"(src6), [src7]"=&f"(src7),
00123           [src]"+r"(src), [dst]"+r"(dst)
00124         : [src_end]"r"(src_end), [len]"r"(len)
00125         : "memory"
00126     );
00127 }
00128 
00129 static void float_to_int16_interleave_mips(int16_t *dst, const float **src, long len,
00130         int channels)
00131 {
00132     int   c, ch2 = channels <<1;
00133     int ret0, ret1, ret2, ret3, ret4, ret5, ret6, ret7;
00134     float src0, src1, src2, src3, src4, src5, src6, src7;
00135     int16_t *dst_ptr0, *dst_ptr1, *dst_ptr2, *dst_ptr3;
00136     int16_t *dst_ptr4, *dst_ptr5, *dst_ptr6, *dst_ptr7;
00137     const float *src_ptr, *src_ptr2, *src_end;
00138 
00139     if (channels == 2) {
00140         src_ptr = &src[0][0];
00141         src_ptr2 = &src[1][0];
00142         src_end = src_ptr + len;
00143 
00144         __asm__ volatile (
00145             "fti16i2_lp%=:                                   \n\t"
00146             "lwc1       %[src0],    0(%[src_ptr])            \n\t"
00147             "lwc1       %[src1],    0(%[src_ptr2])           \n\t"
00148             "addiu      %[src_ptr], 4                        \n\t"
00149             "cvt.w.s    $f9,        %[src0]                  \n\t"
00150             "cvt.w.s    $f10,       %[src1]                  \n\t"
00151             "mfc1       %[ret0],    $f9                      \n\t"
00152             "mfc1       %[ret1],    $f10                     \n\t"
00153             "shll_s.w   %[ret0],    %[ret0], 16              \n\t"
00154             "shll_s.w   %[ret1],    %[ret1], 16              \n\t"
00155             "addiu      %[src_ptr2], 4                       \n\t"
00156             "srl        %[ret0],    %[ret0], 16              \n\t"
00157             "srl        %[ret1],    %[ret1], 16              \n\t"
00158             "sh         %[ret0],    0(%[dst])                \n\t"
00159             "sh         %[ret1],    2(%[dst])                \n\t"
00160             "addiu      %[dst],     4                        \n\t"
00161             "bne        %[src_ptr], %[src_end], fti16i2_lp%= \n\t"
00162             : [ret0]"=&r"(ret0), [ret1]"=&r"(ret1),
00163               [src0]"=&f"(src0), [src1]"=&f"(src1),
00164               [src_ptr]"+r"(src_ptr), [src_ptr2]"+r"(src_ptr2),
00165               [dst]"+r"(dst)
00166             : [src_end]"r"(src_end)
00167             : "memory"
00168         );
00169     } else {
00170         for (c = 0; c < channels; c++) {
00171             src_ptr  = &src[c][0];
00172             dst_ptr0 = &dst[c];
00173             src_end = src_ptr + len;
00174             /*
00175              * loop is 8 times unrolled in assembler in order to achieve better performance
00176              */
00177             __asm__ volatile(
00178                 "fti16i_lp%=:                                     \n\t"
00179                 "lwc1       %[src0], 0(%[src_ptr])                \n\t"
00180                 "lwc1       %[src1], 4(%[src_ptr])                \n\t"
00181                 "lwc1       %[src2], 8(%[src_ptr])                \n\t"
00182                 "lwc1       %[src3], 12(%[src_ptr])               \n\t"
00183                 "cvt.w.s    %[src0], %[src0]                      \n\t"
00184                 "cvt.w.s    %[src1], %[src1]                      \n\t"
00185                 "cvt.w.s    %[src2], %[src2]                      \n\t"
00186                 "cvt.w.s    %[src3], %[src3]                      \n\t"
00187                 "mfc1       %[ret0], %[src0]                      \n\t"
00188                 "mfc1       %[ret1], %[src1]                      \n\t"
00189                 "mfc1       %[ret2], %[src2]                      \n\t"
00190                 "mfc1       %[ret3], %[src3]                      \n\t"
00191                 "lwc1       %[src4], 16(%[src_ptr])               \n\t"
00192                 "lwc1       %[src5], 20(%[src_ptr])               \n\t"
00193                 "lwc1       %[src6], 24(%[src_ptr])               \n\t"
00194                 "lwc1       %[src7], 28(%[src_ptr])               \n\t"
00195                 "addu       %[dst_ptr1], %[dst_ptr0], %[ch2]      \n\t"
00196                 "addu       %[dst_ptr2], %[dst_ptr1], %[ch2]      \n\t"
00197                 "addu       %[dst_ptr3], %[dst_ptr2], %[ch2]      \n\t"
00198                 "addu       %[dst_ptr4], %[dst_ptr3], %[ch2]      \n\t"
00199                 "addu       %[dst_ptr5], %[dst_ptr4], %[ch2]      \n\t"
00200                 "addu       %[dst_ptr6], %[dst_ptr5], %[ch2]      \n\t"
00201                 "addu       %[dst_ptr7], %[dst_ptr6], %[ch2]      \n\t"
00202                 "addiu      %[src_ptr],  32                       \n\t"
00203                 "cvt.w.s    %[src4], %[src4]                      \n\t"
00204                 "cvt.w.s    %[src5], %[src5]                      \n\t"
00205                 "cvt.w.s    %[src6], %[src6]                      \n\t"
00206                 "cvt.w.s    %[src7], %[src7]                      \n\t"
00207                 "shll_s.w   %[ret0], %[ret0], 16                  \n\t"
00208                 "shll_s.w   %[ret1], %[ret1], 16                  \n\t"
00209                 "shll_s.w   %[ret2], %[ret2], 16                  \n\t"
00210                 "shll_s.w   %[ret3], %[ret3], 16                  \n\t"
00211                 "srl        %[ret0], %[ret0], 16                  \n\t"
00212                 "srl        %[ret1], %[ret1], 16                  \n\t"
00213                 "srl        %[ret2], %[ret2], 16                  \n\t"
00214                 "srl        %[ret3], %[ret3], 16                  \n\t"
00215                 "sh         %[ret0], 0(%[dst_ptr0])               \n\t"
00216                 "sh         %[ret1], 0(%[dst_ptr1])               \n\t"
00217                 "sh         %[ret2], 0(%[dst_ptr2])               \n\t"
00218                 "sh         %[ret3], 0(%[dst_ptr3])               \n\t"
00219                 "mfc1       %[ret4], %[src4]                      \n\t"
00220                 "mfc1       %[ret5], %[src5]                      \n\t"
00221                 "mfc1       %[ret6], %[src6]                      \n\t"
00222                 "mfc1       %[ret7], %[src7]                      \n\t"
00223                 "shll_s.w   %[ret4], %[ret4], 16                  \n\t"
00224                 "shll_s.w   %[ret5], %[ret5], 16                  \n\t"
00225                 "shll_s.w   %[ret6], %[ret6], 16                  \n\t"
00226                 "shll_s.w   %[ret7], %[ret7], 16                  \n\t"
00227                 "srl        %[ret4], %[ret4], 16                  \n\t"
00228                 "srl        %[ret5], %[ret5], 16                  \n\t"
00229                 "srl        %[ret6], %[ret6], 16                  \n\t"
00230                 "srl        %[ret7], %[ret7], 16                  \n\t"
00231                 "sh         %[ret4], 0(%[dst_ptr4])               \n\t"
00232                 "sh         %[ret5], 0(%[dst_ptr5])               \n\t"
00233                 "sh         %[ret6], 0(%[dst_ptr6])               \n\t"
00234                 "sh         %[ret7], 0(%[dst_ptr7])               \n\t"
00235                 "addu       %[dst_ptr0], %[dst_ptr7], %[ch2]      \n\t"
00236                 "bne        %[src_ptr],  %[src_end],  fti16i_lp%= \n\t"
00237                 : [ret0]"=&r"(ret0), [ret1]"=&r"(ret1), [ret2]"=&r"(ret2), [ret3]"=&r"(ret3),
00238                   [ret4]"=&r"(ret4), [ret5]"=&r"(ret5), [ret6]"=&r"(ret6), [ret7]"=&r"(ret7),
00239                   [src0]"=&f"(src0), [src1]"=&f"(src1), [src2]"=&f"(src2), [src3]"=&f"(src3),
00240                   [src4]"=&f"(src4), [src5]"=&f"(src5), [src6]"=&f"(src6), [src7]"=&f"(src7),
00241                   [dst_ptr1]"=&r"(dst_ptr1), [dst_ptr2]"=&r"(dst_ptr2), [dst_ptr3]"=&r"(dst_ptr3),
00242                   [dst_ptr4]"=&r"(dst_ptr4), [dst_ptr5]"=&r"(dst_ptr5), [dst_ptr6]"=&r"(dst_ptr6),
00243                   [dst_ptr7]"=&r"(dst_ptr7), [dst_ptr0]"+r"(dst_ptr0), [src_ptr]"+r"(src_ptr)
00244                 : [ch2]"r"(ch2), [src_end]"r"(src_end)
00245                 : "memory"
00246             );
00247         }
00248     }
00249 }
00250 #endif /* HAVE_MIPSDSPR1 */
00251 
00252 static void int32_to_float_fmul_scalar_mips(float *dst, const int *src,
00253         float mul, int len)
00254 {
00255     /*
00256      * variables used in inline assembler
00257      */
00258     float temp1, temp3, temp5, temp7, temp9, temp11, temp13, temp15;
00259 
00260     int rpom1, rpom2, rpom11, rpom21, rpom12, rpom22, rpom13, rpom23;
00261     const int *src_end = src + len;
00262     /*
00263      * loop is 8 times unrolled in assembler in order to achieve better performance
00264      */
00265     __asm__ volatile (
00266         "i32tf_lp%=:                                    \n\t"
00267         "lw       %[rpom11],     0(%[src])              \n\t"
00268         "lw       %[rpom21],     4(%[src])              \n\t"
00269         "lw       %[rpom1],      8(%[src])              \n\t"
00270         "lw       %[rpom2],      12(%[src])             \n\t"
00271         "mtc1     %[rpom11],     %[temp1]               \n\t"
00272         "mtc1     %[rpom21],     %[temp3]               \n\t"
00273         "mtc1     %[rpom1],      %[temp5]               \n\t"
00274         "mtc1     %[rpom2],      %[temp7]               \n\t"
00275 
00276         "lw       %[rpom13],     16(%[src])             \n\t"
00277         "lw       %[rpom23],     20(%[src])             \n\t"
00278         "lw       %[rpom12],     24(%[src])             \n\t"
00279         "lw       %[rpom22],     28(%[src])             \n\t"
00280         "mtc1     %[rpom13],     %[temp9]               \n\t"
00281         "mtc1     %[rpom23],     %[temp11]              \n\t"
00282         "mtc1     %[rpom12],     %[temp13]              \n\t"
00283         "mtc1     %[rpom22],     %[temp15]              \n\t"
00284 
00285         "addiu    %[src],        32                     \n\t"
00286         "cvt.s.w  %[temp1],      %[temp1]               \n\t"
00287         "cvt.s.w  %[temp3],      %[temp3]               \n\t"
00288         "cvt.s.w  %[temp5],      %[temp5]               \n\t"
00289         "cvt.s.w  %[temp7],      %[temp7]               \n\t"
00290 
00291         "cvt.s.w  %[temp9],      %[temp9]               \n\t"
00292         "cvt.s.w  %[temp11],     %[temp11]              \n\t"
00293         "cvt.s.w  %[temp13],     %[temp13]              \n\t"
00294         "cvt.s.w  %[temp15],     %[temp15]              \n\t"
00295 
00296         "mul.s   %[temp1],       %[temp1],    %[mul]    \n\t"
00297         "mul.s   %[temp3],       %[temp3],    %[mul]    \n\t"
00298         "mul.s   %[temp5],       %[temp5],    %[mul]    \n\t"
00299         "mul.s   %[temp7],       %[temp7],    %[mul]    \n\t"
00300 
00301         "mul.s   %[temp9],       %[temp9],    %[mul]    \n\t"
00302         "mul.s   %[temp11],      %[temp11],   %[mul]    \n\t"
00303         "mul.s   %[temp13],      %[temp13],   %[mul]    \n\t"
00304         "mul.s   %[temp15],      %[temp15],   %[mul]    \n\t"
00305 
00306         "swc1    %[temp1],       0(%[dst])              \n\t" /*dst[i] = src[i] * mul;    */
00307         "swc1    %[temp3],       4(%[dst])              \n\t" /*dst[i+1] = src[i+1] * mul;*/
00308         "swc1    %[temp5],       8(%[dst])              \n\t" /*dst[i+2] = src[i+2] * mul;*/
00309         "swc1    %[temp7],       12(%[dst])             \n\t" /*dst[i+3] = src[i+3] * mul;*/
00310 
00311         "swc1    %[temp9],       16(%[dst])             \n\t" /*dst[i+4] = src[i+4] * mul;*/
00312         "swc1    %[temp11],      20(%[dst])             \n\t" /*dst[i+5] = src[i+5] * mul;*/
00313         "swc1    %[temp13],      24(%[dst])             \n\t" /*dst[i+6] = src[i+6] * mul;*/
00314         "swc1    %[temp15],      28(%[dst])             \n\t" /*dst[i+7] = src[i+7] * mul;*/
00315         "addiu   %[dst],        32                      \n\t"
00316         "bne     %[src],        %[src_end], i32tf_lp%=  \n\t"
00317         : [temp1]"=&f"(temp1),   [temp11]"=&f"(temp11),
00318           [temp13]"=&f"(temp13), [temp15]"=&f"(temp15),
00319           [temp3]"=&f"(temp3),   [temp5]"=&f"(temp5),
00320           [temp7]"=&f"(temp7),   [temp9]"=&f"(temp9),
00321           [rpom1]"=&r"(rpom1),   [rpom2]"=&r"(rpom2),
00322           [rpom11]"=&r"(rpom11), [rpom21]"=&r"(rpom21),
00323           [rpom12]"=&r"(rpom12), [rpom22]"=&r"(rpom22),
00324           [rpom13]"=&r"(rpom13), [rpom23]"=&r"(rpom23),
00325           [dst]"+r"(dst),       [src]"+r"(src)
00326         : [mul]"f"(mul),        [src_end]"r"(src_end)
00327         : "memory"
00328     );
00329 }
00330 
00331 av_cold void ff_fmt_convert_init_mips(FmtConvertContext *c)
00332 {
00333 #if HAVE_MIPSDSPR1
00334     c->float_to_int16_interleave = float_to_int16_interleave_mips;
00335     c->float_to_int16 = float_to_int16_mips;
00336 #endif
00337     c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_mips;
00338 }
libavcodec/mips/fmtconvert_mips.c
