ffmpeg/libavresample/x86/audio_mix.asm

;******************************************************************************
;* x86 optimized channel mixing
;* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
;*
;* This file is part of Libav.
;*
;* Libav is free software; you can redistribute it and/or
;* modify it under the terms of the GNU Lesser General Public
;* License as published by the Free Software Foundation; either
;* version 2.1 of the License, or (at your option) any later version.
;*
;* Libav 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
;* Lesser General Public License for more details.
;*
;* You should have received a copy of the GNU Lesser General Public
;* License along with Libav; if not, write to the Free Software
;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;******************************************************************************

%include "x86inc.asm"
%include "x86util.asm"

SECTION_TEXT

;-----------------------------------------------------------------------------
; void ff_mix_2_to_1_fltp_flt(float **src, float **matrix, int len,
;                             int out_ch, int in_ch);
;-----------------------------------------------------------------------------

%macro MIX_2_TO_1_FLTP_FLT 0
cglobal mix_2_to_1_fltp_flt, 3,4,6, src, matrix, len, src1
    mov       src1q, [srcq+gprsize]
    mov        srcq, [srcq        ]
    sub       src1q, srcq
    mov     matrixq, [matrixq  ]
    VBROADCASTSS m4, [matrixq  ]
    VBROADCASTSS m5, [matrixq+4]
    ALIGN 16
.loop:
    mulps        m0, m4, [srcq             ]
    mulps        m1, m5, [srcq+src1q       ]
    mulps        m2, m4, [srcq+      mmsize]
    mulps        m3, m5, [srcq+src1q+mmsize]
    addps        m0, m0, m1
    addps        m2, m2, m3
    mova  [srcq       ], m0
    mova  [srcq+mmsize], m2
    add        srcq, mmsize*2
    sub        lend, mmsize*2/4
    jg .loop
%if mmsize == 32
    vzeroupper
    RET
%else
    REP_RET
%endif
%endmacro

INIT_XMM sse
MIX_2_TO_1_FLTP_FLT
%if HAVE_AVX
INIT_YMM avx
MIX_2_TO_1_FLTP_FLT
%endif