diff options
Diffstat (limited to 'libavcodec/x86/flac_dsp_gpl.asm')
| -rw-r--r-- | libavcodec/x86/flac_dsp_gpl.asm | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/libavcodec/x86/flac_dsp_gpl.asm b/libavcodec/x86/flac_dsp_gpl.asm new file mode 100644 index 0000000..cedf083 --- /dev/null +++ b/libavcodec/x86/flac_dsp_gpl.asm @@ -0,0 +1,101 @@ +;****************************************************************************** +;* FLAC DSP functions +;* +;* Copyright (c) 2014 James Darnley <james.darnley@gmail.com> +;* +;* This file is part of FFmpeg. +;* +;* FFmpeg is free software; you can redistribute it and/or modify +;* it under the terms of the GNU General Public License as published by +;* the Free Software Foundation; either version 2 of the License, or +;* (at your option) any later version. +;* +;* FFmpeg is distributed in the hope that it will be useful, +;* but WITHOUT ANY WARRANTY; without even the implied warranty of +;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;* GNU General Public License for more details. +;* +;* You should have received a copy of the GNU General Public License along +;* with FFmpeg; if not, write to the Free Software Foundation, Inc., +;* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +;****************************************************************************** + +%include "libavutil/x86/x86util.asm" + +SECTION_TEXT + +INIT_XMM sse4 +%if ARCH_X86_64 + cglobal flac_enc_lpc_16, 5, 7, 8, 0, res, smp, len, order, coefs + DECLARE_REG_TMP 5, 6 + %define length r2d + + movsxd orderq, orderd +%else + cglobal flac_enc_lpc_16, 5, 6, 8, 0, res, smp, len, order, coefs + DECLARE_REG_TMP 2, 5 + %define length r2mp +%endif + +; Here we assume that the maximum order value is 32. This means that we only +; need to copy a maximum of 32 samples. Therefore we let the preprocessor +; unroll this loop and copy all 32. +%assign iter 0 +%rep 32/(mmsize/4) + movu m0, [smpq+iter] + movu [resq+iter], m0 + %assign iter iter+mmsize +%endrep + +lea resq, [resq+orderq*4] +lea smpq, [smpq+orderq*4] +lea coefsq, [coefsq+orderq*4] +sub length, orderd +movd m3, r5m +neg orderq + +%define posj t0q +%define negj t1q + +.looplen: + pxor m0, m0 + pxor m4, m4 + pxor m6, m6 + mov posj, orderq + xor negj, negj + + .looporder: + movd m2, [coefsq+posj*4] ; c = coefs[j] + SPLATD m2 + movu m1, [smpq+negj*4-4] ; s = smp[i-j-1] + movu m5, [smpq+negj*4-4+mmsize] + movu m7, [smpq+negj*4-4+mmsize*2] + pmulld m1, m2 + pmulld m5, m2 + pmulld m7, m2 + paddd m0, m1 ; p += c * s + paddd m4, m5 + paddd m6, m7 + + dec negj + inc posj + jnz .looporder + + psrad m0, m3 ; p >>= shift + psrad m4, m3 + psrad m6, m3 + movu m1, [smpq] + movu m5, [smpq+mmsize] + movu m7, [smpq+mmsize*2] + psubd m1, m0 ; smp[i] - p + psubd m5, m4 + psubd m7, m6 + movu [resq], m1 ; res[i] = smp[i] - (p >> shift) + movu [resq+mmsize], m5 + movu [resq+mmsize*2], m7 + + add resq, 3*mmsize + add smpq, 3*mmsize + sub length, (3*mmsize)/4 +jg .looplen +RET |
