lavc/flacenc: add sse4 version of the 16-bit lpc encoder
From 1.8 to 2.4 times faster. Runtime is reduced by 2 to 39%. The speed-up generally increases with compression_level. This lpc encoder is not used with levels < 3 so it provides no speed-up in these cases. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
James Darnley
Michael Niedermayer
parent
7cafdfe9c7
commit
0081a14e7d
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@ -15,6 +15,7 @@ Specifically, the GPL parts of FFmpeg are:
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- libpostproc
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- libmpcodecs
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- optional x86 optimizations in the files
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libavcodec/x86/flac_dsp_gpl.asm
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libavcodec/x86/idct_mmx.c
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- libutvideo encoding/decoding wrappers in
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libavcodec/libutvideo*.cpp
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@ -80,7 +80,7 @@ typedef struct FlacSubframe {
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int shift;
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RiceContext rc;
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int32_t samples[FLAC_MAX_BLOCKSIZE];
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int32_t residual[FLAC_MAX_BLOCKSIZE+1];
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int32_t residual[FLAC_MAX_BLOCKSIZE+3];
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} FlacSubframe;
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typedef struct FlacFrame {
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@ -83,6 +83,9 @@ YASM-OBJS-$(CONFIG_DIRAC_DECODER) += x86/diracdsp_mmx.o x86/diracdsp_yasm.o
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YASM-OBJS-$(CONFIG_DNXHD_ENCODER) += x86/dnxhdenc.o
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YASM-OBJS-$(CONFIG_FFT) += x86/fft.o
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YASM-OBJS-$(CONFIG_FLAC_DECODER) += x86/flacdsp.o
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ifdef CONFIG_GPL
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YASM-OBJS-$(CONFIG_FLAC_ENCODER) += x86/flac_dsp_gpl.o
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endif
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YASM-OBJS-$(CONFIG_H263DSP) += x86/h263_loopfilter.o
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YASM-OBJS-$(CONFIG_H264CHROMA) += x86/h264_chromamc.o \
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x86/h264_chromamc_10bit.o
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@ -0,0 +1,85 @@
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;******************************************************************************
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;* FLAC DSP functions
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;*
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;* Copyright (c) 2014 James Darnley <james.darnley@gmail.com>
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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 modify
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;* it under the terms of the GNU General Public License as published by
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;* the Free Software Foundation; either version 2 of the License, or
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;* (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
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;* GNU General Public License for more details.
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;*
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;* You should have received a copy of the GNU General Public License along
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;* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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;* 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_TEXT
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INIT_XMM sse4
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%if ARCH_X86_64
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cglobal flac_enc_lpc_16, 5, 7, 4, 0, res, smp, len, order, coefs
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DECLARE_REG_TMP 5, 6
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%define length r2d
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movsxd orderq, orderd
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%else
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cglobal flac_enc_lpc_16, 5, 6, 4, 0, res, smp, len, order, coefs
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DECLARE_REG_TMP 2, 5
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%define length r2mp
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%endif
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; Here we assume that the maximum order value is 32. This means that we only
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; need to copy a maximum of 32 samples. Therefore we let the preprocessor
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; unroll this loop and copy all 32.
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%assign iter 0
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%rep 32/(mmsize/4)
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movu m0, [smpq+iter]
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movu [resq+iter], m0
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%assign iter iter+mmsize
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%endrep
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lea resq, [resq+orderq*4]
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lea smpq, [smpq+orderq*4]
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lea coefsq, [coefsq+orderq*4]
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sub length, orderd
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movd m3, r5m
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neg orderq
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%define posj t0q
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%define negj t1q
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.looplen:
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pxor m0, m0
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mov posj, orderq
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xor negj, negj
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.looporder:
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movd m2, [coefsq+posj*4] ; c = coefs[j]
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SPLATD m2
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movu m1, [smpq+negj*4-4] ; s = smp[i-j-1]
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pmulld m1, m2
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paddd m0, m1 ; p += c * s
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dec negj
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inc posj
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jnz .looporder
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psrad m0, m3 ; p >>= shift
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movu m1, [smpq]
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psubd m1, m0 ; smp[i] - p
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movu [resq], m1 ; res[i] = smp[i] - (p >> shift)
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add resq, mmsize
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add smpq, mmsize
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sub length, mmsize/4
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jg .looplen
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RET
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@ -27,6 +27,8 @@ void ff_flac_lpc_32_sse4(int32_t *samples, const int coeffs[32], int order,
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void ff_flac_lpc_32_xop(int32_t *samples, const int coeffs[32], int order,
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int qlevel, int len);
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void ff_flac_enc_lpc_16_sse4(int32_t *, const int32_t *, int, int, const int32_t *,int);
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av_cold void ff_flacdsp_init_x86(FLACDSPContext *c, enum AVSampleFormat fmt,
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int bps)
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{
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@ -36,6 +38,8 @@ av_cold void ff_flacdsp_init_x86(FLACDSPContext *c, enum AVSampleFormat fmt,
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if (EXTERNAL_SSE4(cpu_flags)) {
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if (bps > 16 && CONFIG_FLAC_DECODER)
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c->lpc = ff_flac_lpc_32_sse4;
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if (bps == 16 && CONFIG_FLAC_ENCODER && CONFIG_GPL)
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c->lpc_encode = ff_flac_enc_lpc_16_sse4;
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}
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if (EXTERNAL_XOP(cpu_flags)) {
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if (bps > 16 && CONFIG_FLAC_DECODER)
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