diff options
Diffstat (limited to 'chromium/third_party/ffmpeg/libavcodec/x86/ac3dsp.asm')
| -rw-r--r-- | chromium/third_party/ffmpeg/libavcodec/x86/ac3dsp.asm | 133 |
1 files changed, 132 insertions, 1 deletions
diff --git a/chromium/third_party/ffmpeg/libavcodec/x86/ac3dsp.asm b/chromium/third_party/ffmpeg/libavcodec/x86/ac3dsp.asm index 89a64f50d4b..b24441614b7 100644 --- a/chromium/third_party/ffmpeg/libavcodec/x86/ac3dsp.asm +++ b/chromium/third_party/ffmpeg/libavcodec/x86/ac3dsp.asm @@ -1,5 +1,5 @@ ;***************************************************************************** -;* x86-optimized AC-3 DSP utils +;* x86-optimized AC-3 DSP functions ;* Copyright (c) 2011 Justin Ruggles ;* ;* This file is part of FFmpeg. @@ -35,6 +35,10 @@ pw_bap_mul2: dw 5, 7, 0, 7, 5, 7, 0, 7 pd_1: times 4 dd 1 pd_151: times 4 dd 151 +; used in ff_apply_window_int16() +pb_revwords: SHUFFLE_MASK_W 7, 6, 5, 4, 3, 2, 1, 0 +pd_16384: times 4 dd 16384 + SECTION .text ;----------------------------------------------------------------------------- @@ -419,3 +423,130 @@ AC3_EXTRACT_EXPONENTS INIT_XMM ssse3 AC3_EXTRACT_EXPONENTS %endif + +;----------------------------------------------------------------------------- +; void ff_apply_window_int16(int16_t *output, const int16_t *input, +; const int16_t *window, unsigned int len) +;----------------------------------------------------------------------------- + +%macro REVERSE_WORDS 1-2 +%if cpuflag(ssse3) && notcpuflag(atom) + pshufb %1, %2 +%elif cpuflag(sse2) + pshuflw %1, %1, 0x1B + pshufhw %1, %1, 0x1B + pshufd %1, %1, 0x4E +%elif cpuflag(mmxext) + pshufw %1, %1, 0x1B +%endif +%endmacro + +%macro MUL16FIXED 3 +%if cpuflag(ssse3) ; dst, src, unused +; dst = ((dst * src) + (1<<14)) >> 15 + pmulhrsw %1, %2 +%elif cpuflag(mmxext) ; dst, src, temp +; dst = (dst * src) >> 15 +; pmulhw cuts off the bottom bit, so we have to lshift by 1 and add it back +; in from the pmullw result. + mova %3, %1 + pmulhw %1, %2 + pmullw %3, %2 + psrlw %3, 15 + psllw %1, 1 + por %1, %3 +%endif +%endmacro + +%macro APPLY_WINDOW_INT16 1 ; %1 bitexact version +%if %1 +cglobal apply_window_int16, 4,5,6, output, input, window, offset, offset2 +%else +cglobal apply_window_int16_round, 4,5,6, output, input, window, offset, offset2 +%endif + lea offset2q, [offsetq-mmsize] +%if cpuflag(ssse3) && notcpuflag(atom) + mova m5, [pb_revwords] + ALIGN 16 +%elif %1 + mova m5, [pd_16384] +%endif +.loop: +%if cpuflag(ssse3) + ; This version does the 16x16->16 multiplication in-place without expanding + ; to 32-bit. The ssse3 version is bit-identical. + mova m0, [windowq+offset2q] + mova m1, [ inputq+offset2q] + pmulhrsw m1, m0 + REVERSE_WORDS m0, m5 + pmulhrsw m0, [ inputq+offsetq ] + mova [outputq+offset2q], m1 + mova [outputq+offsetq ], m0 +%elif %1 + ; This version expands 16-bit to 32-bit, multiplies by the window, + ; adds 16384 for rounding, right shifts 15, then repacks back to words to + ; save to the output. The window is reversed for the second half. + mova m3, [windowq+offset2q] + mova m4, [ inputq+offset2q] + pxor m0, m0 + punpcklwd m0, m3 + punpcklwd m1, m4 + pmaddwd m0, m1 + paddd m0, m5 + psrad m0, 15 + pxor m2, m2 + punpckhwd m2, m3 + punpckhwd m1, m4 + pmaddwd m2, m1 + paddd m2, m5 + psrad m2, 15 + packssdw m0, m2 + mova [outputq+offset2q], m0 + REVERSE_WORDS m3 + mova m4, [ inputq+offsetq] + pxor m0, m0 + punpcklwd m0, m3 + punpcklwd m1, m4 + pmaddwd m0, m1 + paddd m0, m5 + psrad m0, 15 + pxor m2, m2 + punpckhwd m2, m3 + punpckhwd m1, m4 + pmaddwd m2, m1 + paddd m2, m5 + psrad m2, 15 + packssdw m0, m2 + mova [outputq+offsetq], m0 +%else + ; This version does the 16x16->16 multiplication in-place without expanding + ; to 32-bit. The mmxext and sse2 versions do not use rounding, and + ; therefore are not bit-identical to the C version. + mova m0, [windowq+offset2q] + mova m1, [ inputq+offset2q] + mova m2, [ inputq+offsetq ] + MUL16FIXED m1, m0, m3 + REVERSE_WORDS m0 + MUL16FIXED m2, m0, m3 + mova [outputq+offset2q], m1 + mova [outputq+offsetq ], m2 +%endif + add offsetd, mmsize + sub offset2d, mmsize + jae .loop + REP_RET +%endmacro + +INIT_MMX mmxext +APPLY_WINDOW_INT16 0 +INIT_XMM sse2 +APPLY_WINDOW_INT16 0 + +INIT_MMX mmxext +APPLY_WINDOW_INT16 1 +INIT_XMM sse2 +APPLY_WINDOW_INT16 1 +INIT_XMM ssse3 +APPLY_WINDOW_INT16 1 +INIT_XMM ssse3, atom +APPLY_WINDOW_INT16 1 |