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6148 serge 1 
;*****************************************************************************
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;* x86-optimized functions for volume filter
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;* Copyright (c) 2012 Justin Ruggles
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;*
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;* This file is part of FFmpeg.
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;*
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;* FFmpeg is free software; you can redistribute it and/or
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;* modify it under the terms of the GNU Lesser General Public
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;* License as published by the Free Software Foundation; either
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;* version 2.1 of the License, or (at your option) any later version.
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;*
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;* FFmpeg is distributed in the hope that it will be useful,
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;* but WITHOUT ANY WARRANTY; without even the implied warranty of
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;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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;* Lesser General Public License for more details.
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;*
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;* You should have received a copy of the GNU Lesser General Public
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;* License along with FFmpeg; if not, write to the Free Software
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;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;******************************************************************************
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%include "libavutil/x86/x86util.asm"
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SECTION_RODATA 32
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pd_1_256:     times 4 dq 0x3F70000000000000
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pd_int32_max: times 4 dq 0x41DFFFFFFFC00000
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pw_1:         times 8 dw 1
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pw_128:       times 8 dw 128
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pq_128:       times 2 dq 128
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SECTION_TEXT
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;------------------------------------------------------------------------------
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; void ff_scale_samples_s16(uint8_t *dst, const uint8_t *src, int len,
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;                           int volume)
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;------------------------------------------------------------------------------
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INIT_XMM sse2
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cglobal scale_samples_s16, 4,4,4, dst, src, len, volume
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    movd        m0, volumem
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    pshuflw     m0, m0, 0
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    punpcklwd   m0, [pw_1]
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    mova        m1, [pw_128]
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    lea       lenq, [lend*2-mmsize]
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.loop:
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    ; dst[i] = av_clip_int16((src[i] * volume + 128) >> 8);
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    mova        m2, [srcq+lenq]
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    punpcklwd   m3, m2, m1
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    punpckhwd   m2, m1
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    pmaddwd     m3, m0
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    pmaddwd     m2, m0
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    psrad       m3, 8
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    psrad       m2, 8
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    packssdw    m3, m2
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    mova  [dstq+lenq], m3
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    sub       lenq, mmsize
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    jge .loop
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    REP_RET
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;------------------------------------------------------------------------------
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; void ff_scale_samples_s32(uint8_t *dst, const uint8_t *src, int len,
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;                           int volume)
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;------------------------------------------------------------------------------
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%macro SCALE_SAMPLES_S32 0
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cglobal scale_samples_s32, 4,4,4, dst, src, len, volume
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%if ARCH_X86_32 && cpuflag(avx)
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    vbroadcastss   xmm2, volumem
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%else
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    movd           xmm2, volumed
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    pshufd         xmm2, xmm2, 0
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%endif
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    CVTDQ2PD         m2, xmm2
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    mulpd            m2, m2, [pd_1_256]
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    mova             m3, [pd_int32_max]
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    lea            lenq, [lend*4-mmsize]
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.loop:
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    CVTDQ2PD         m0, [srcq+lenq         ]
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    CVTDQ2PD         m1, [srcq+lenq+mmsize/2]
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    mulpd            m0, m0, m2
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    mulpd            m1, m1, m2
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    minpd            m0, m0, m3
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    minpd            m1, m1, m3
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    cvtpd2dq       xmm0, m0
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    cvtpd2dq       xmm1, m1
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%if cpuflag(avx)
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    vmovdqa [dstq+lenq         ], xmm0
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    vmovdqa [dstq+lenq+mmsize/2], xmm1
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%else
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    movq    [dstq+lenq         ], xmm0
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    movq    [dstq+lenq+mmsize/2], xmm1
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%endif
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    sub            lenq, mmsize
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    jge .loop
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    REP_RET
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%endmacro
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INIT_XMM sse2
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%define CVTDQ2PD cvtdq2pd
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SCALE_SAMPLES_S32
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%if HAVE_AVX_EXTERNAL
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%define CVTDQ2PD vcvtdq2pd
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INIT_YMM avx
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SCALE_SAMPLES_S32
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%endif
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%undef CVTDQ2PD
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; NOTE: This is not bit-identical with the C version because it clips to
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;       [-INT_MAX, INT_MAX] instead of [INT_MIN, INT_MAX]
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INIT_XMM ssse3, atom
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cglobal scale_samples_s32, 4,4,8, dst, src, len, volume
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    movd        m4, volumem
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    pshufd      m4, m4, 0
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    mova        m5, [pq_128]
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    pxor        m6, m6
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    lea       lenq, [lend*4-mmsize]
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.loop:
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    ; src[i] = av_clipl_int32((src[i] * volume + 128) >> 8);
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    mova        m7, [srcq+lenq]
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    pabsd       m3, m7
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    pshufd      m0, m3, q0100
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    pshufd      m1, m3, q0302
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    pmuludq     m0, m4
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    pmuludq     m1, m4
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    paddq       m0, m5
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    paddq       m1, m5
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    psrlq       m0, 7
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    psrlq       m1, 7
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    shufps      m2, m0, m1, q3131
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    shufps      m0, m0, m1, q2020
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    pcmpgtd     m2, m6
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    por         m0, m2
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    psrld       m0, 1
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    psignd      m0, m7
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    mova  [dstq+lenq], m0
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    sub       lenq, mmsize
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    jge .loop
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    REP_RET