mirror of
https://github.com/webmproject/libwebp.git
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SSE2 version of simple in-loop filtering
~10% faster decoding Patch by Somnath Banerjee (somnath at google dot com) Change-Id: I200db408272b4f61cda9d9261d2d4370a698d6c4
This commit is contained in:
Pascal Massimino
parent
42548da9e3
commit
a11009d7fc
@ -36,7 +36,7 @@
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#include "webp/encode.h"
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#include "stopwatch.h"
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extern void* VP8GetCPUInfo; // opaque forward declaration.
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extern void* VP8EncGetCPUInfo; // opaque forward declaration.
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//-----------------------------------------------------------------------------
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@ -747,7 +747,7 @@ int main(int argc, const char *argv[]) {
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resize_w = strtol(argv[++c], NULL, 0);
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resize_h = strtol(argv[++c], NULL, 0);
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} else if (!strcmp(argv[c], "-noasm")) {
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VP8GetCPUInfo = NULL;
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VP8EncGetCPUInfo = NULL;
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} else if (!strcmp(argv[c], "-version")) {
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const int version = WebPGetEncoderVersion();
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printf("%d.%d.%d\n",
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@ -40,6 +40,8 @@ extern "C" {
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//-----------------------------------------------------------------------------
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extern void* VP8DecGetCPUInfo; // opaque forward declaration.
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static int verbose = 0;
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#ifdef _WIN32
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@ -233,6 +235,7 @@ static void Help(void) {
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" file with IMC4 layout.\n"
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" -version: print version number and exit.\n"
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"Use -v for verbose (e.g. print encoding/decoding times)\n"
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"Use -noasm to disable all assembly optimizations.\n"
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);
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}
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@ -265,6 +268,8 @@ int main(int argc, const char *argv[]) {
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format = PGM;
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} else if (!strcmp(argv[c], "-v")) {
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verbose = 1;
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} else if (!strcmp(argv[c], "-noasm")) {
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VP8DecGetCPUInfo = NULL;
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} else if (argv[c][0] == '-') {
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printf("Unknown option '%s'\n", argv[c]);
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Help();
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@ -54,9 +54,9 @@ OBJS = src/enc/webpenc.o src/enc/bit_writer.o src/enc/syntax.o \
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src/enc/quant.o src/enc/iterator.o src/enc/analysis.o \
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src/enc/cost.o src/enc/picture.o src/enc/filter.o \
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src/enc/layer.o \
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src/dec/bits.o src/dec/dsp.o src/dec/frame.o src/dec/webp.o \
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src/dec/quant.o src/dec/tree.o src/dec/vp8.o src/dec/yuv.o \
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src/dec/idec.o src/dec/alpha.o src/dec/layer.o
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src/dec/bits.o src/dec/dsp.o src/dec/dsp_sse2.o src/dec/frame.o \
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src/dec/webp.o src/dec/quant.o src/dec/tree.o src/dec/vp8.o \
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src/dec/yuv.o src/dec/idec.o src/dec/alpha.o src/dec/layer.o
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HDRS = src/webp/encode.h src/enc/vp8enci.h src/enc/bit_writer.h \
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src/enc/cost.h src/dec/bits.h src/dec/vp8i.h src/dec/yuv.h
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OUTPUT = examples/cwebp examples/dwebp src/libwebp.a
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@ -34,6 +34,9 @@ for verification and debugging purpose.
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.TP
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.B \-v
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Print extra information (decoding time in particular).
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.TP
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.B \-noasm
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Disable all assembly optimizations.
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.SH Examples:
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dwebp picture.webp -o output.png
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@ -1,6 +1,6 @@
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AM_CPPFLAGS = -I$(top_srcdir)/src
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libwebpdecode_la_SOURCES = bits.h vp8i.h yuv.h bits.c dsp.c frame.c \
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libwebpdecode_la_SOURCES = bits.h vp8i.h yuv.h bits.c dsp.c dsp_sse2.c frame.c \
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quant.c tree.c vp8.c webp.c yuv.c idec.c alpha.c \
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layer.c
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libwebpdecode_la_LDFLAGS = -version-info 0:0:0
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@ -682,9 +682,62 @@ void (*VP8SimpleVFilter16i)(uint8_t*, int, int) = SimpleVFilter16i;
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void (*VP8SimpleHFilter16i)(uint8_t*, int, int) = SimpleHFilter16i;
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//-----------------------------------------------------------------------------
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// SSE2 detection.
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//
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#if defined(__pic__) && defined(__i386__)
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static inline void GetCPUInfo(int cpu_info[4], int info_type) {
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__asm__ volatile (
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"mov %%ebx, %%edi\n"
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"cpuid\n"
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"xchg %%edi, %%ebx\n"
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: "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
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: "a"(info_type));
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}
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#elif defined(__i386__) || defined(__x86_64__)
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static inline void GetCPUInfo(int cpu_info[4], int info_type) {
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__asm__ volatile (
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"cpuid\n"
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: "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
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: "a"(info_type));
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}
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#elif defined(_MSC_VER) // Visual C++
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#define GetCPUInfo __cpuid
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#endif
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#if defined(__i386__) || defined(__x86_64__) || defined(_MSC_VER)
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static int x86CPUInfo(CPUFeature feature) {
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int cpu_info[4];
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GetCPUInfo(cpu_info, 1);
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if (feature == kSSE2) {
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return 0 != (cpu_info[3] & 0x04000000);
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}
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if (feature == kSSE3) {
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return 0 != (cpu_info[2] & 0x00000001);
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}
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return 0;
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}
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VP8CPUInfo VP8DecGetCPUInfo = x86CPUInfo;
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#else
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VP8CPUInfo VP8DecGetCPUInfo = NULL;
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#endif
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//-----------------------------------------------------------------------------
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extern void VP8DspInitSSE2(void);
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void VP8DspInit(void) {
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// later we'll plug some SSE2 variant here
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// If defined, use CPUInfo() to overwrite some pointers with faster versions.
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if (VP8DecGetCPUInfo) {
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if (VP8DecGetCPUInfo(kSSE2)) {
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#if defined(__SSE2__) || defined(_MSC_VER)
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VP8DspInitSSE2();
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#endif
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}
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if (VP8DecGetCPUInfo(kSSE3)) {
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// later we'll plug some SSE3 variant here
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}
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}
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}
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#if defined(__cplusplus) || defined(c_plusplus)
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253
src/dec/dsp_sse2.c
Normal file
253
src/dec/dsp_sse2.c
Normal file
@ -0,0 +1,253 @@
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// Copyright 2011 Google Inc.
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//
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// This code is licensed under the same terms as WebM:
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// Software License Agreement: http://www.webmproject.org/license/software/
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// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
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// -----------------------------------------------------------------------------
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//
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// SSE2 version of dsp functions and loop filtering.
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//
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// Author: somnath@google.com (Somnath Banerjee)
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#if defined(__SSE2__) || defined(_MSC_VER)
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#include <emmintrin.h>
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#include "vp8i.h"
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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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static inline void SignedShift3(__m128i *a) {
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__m128i t1 = *a;
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// Shift the lower byte of 16 bit by 3 while preserving the sign bit
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t1 = _mm_slli_epi16(t1, 8);
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t1 = _mm_srai_epi16(t1, 3);
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t1 = _mm_srli_epi16(t1, 8);
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// Shift the upper byte of 16 bit by 3 while preserving the sign bit
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*a = _mm_srai_epi16(*a, 11);
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*a = _mm_slli_epi16(*a, 8);
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*a = _mm_or_si128(t1, *a); // put the two together
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}
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// 4 columns in, 2 columns out
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static void DoFilter2SSE2(__m128i p1, __m128i p0, __m128i q0, __m128i q1,
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int thresh, __m128i* op, __m128i* oq) {
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__m128i t1, t2, t3;
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__m128i mask = _mm_setzero_si128();
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const __m128i one = _mm_set1_epi8(1);
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const __m128i four = _mm_set1_epi8(4);
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const __m128i lsb_mask = _mm_set1_epi8(0xFE);
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const __m128i sign_bit = _mm_set1_epi8(0x80);
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// Calculate mask
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t3 = _mm_subs_epu8(q1, p1); // (q1 - p1)
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t1 = _mm_subs_epu8(p1, q1); // (p1 - q1)
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t1 = _mm_or_si128(t1, t3); // abs(p1 - q1)
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t1 = _mm_and_si128(t1, lsb_mask); // set lsb of each byte to zero
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t1 = _mm_srli_epi16(t1, 1); // abs(p1 - q1) / 2
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t3 = _mm_subs_epu8(p0, q0); // (p0 - q0)
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t2 = _mm_subs_epu8(q0, p0); // (q0 - p0)
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t2 = _mm_or_si128(t2, t3); // abs(p0 - q0)
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t2 = _mm_adds_epu8(t2, t2); // abs(p0 - q0) * 2
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t2 = _mm_adds_epu8(t2, t1); // abs(p0 - q0) * 2 + abs(p1 - q1) / 2
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t3 = _mm_set1_epi8(thresh);
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t2 = _mm_subs_epu8(t2, t3); // abs(p0 - q0) * 2 + abs(p1 - q1) / 2 > thresh
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mask = _mm_cmpeq_epi8(t2, mask);
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// Start work on filters
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p1 = _mm_xor_si128(p1, sign_bit); // convert to signed values
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q1 = _mm_xor_si128(q1, sign_bit);
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p0 = _mm_xor_si128(p0, sign_bit);
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q0 = _mm_xor_si128(q0, sign_bit);
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p1 = _mm_subs_epi8(p1, q1); // p1 - q1
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t1 = _mm_subs_epi8(q0, p0); // q0 - p0
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p1 = _mm_adds_epi8(p1, t1); // p1 - q1 + 1 * (q0 - p0)
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p1 = _mm_adds_epi8(p1, t1); // p1 - q1 + 2 * (q0 - p0)
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p1 = _mm_adds_epi8(p1, t1); // p1 - q1 + 3 * (q0 - p0)
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p1 = _mm_and_si128(mask, p1); // mask filter values we don't care about
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// Do +4 side
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p1 = _mm_adds_epi8(p1, four); // 3 * (q0 - p0) + (p1 - q1) + 4
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t1 = p1;
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SignedShift3(&t1); // t1 >> 3
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q0 = _mm_subs_epi8(q0, t1); // q0 -= a
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*oq = _mm_xor_si128(q0, sign_bit); // unoffset
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// Now do +3 side
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p1 = _mm_subs_epi8(p1, one); // +3 instead of +4
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SignedShift3(&p1); // p1 >> 3
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p0 = _mm_adds_epi8(p0, p1); // p0 += b
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*op = _mm_xor_si128(p0, sign_bit); // unoffset
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}
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// Reads 8 rows across a vertical edge.
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//
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// TODO(somnath): Investigate _mm_shuffle* also see if it can be broken into
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// two Load4x4() to avoid code duplication.
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static void Load8x4(const uint8_t* b, int stride, __m128i* p, __m128i* q) {
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__m128i t1, t2;
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// Load 0th, 1st, 4th and 5th rows
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__m128i r0 = _mm_cvtsi32_si128(*((int*)&b[0 * stride])); // 03 02 01 00
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__m128i r1 = _mm_cvtsi32_si128(*((int*)&b[1 * stride])); // 13 12 11 10
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__m128i r4 = _mm_cvtsi32_si128(*((int*)&b[4 * stride])); // 43 42 41 40
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__m128i r5 = _mm_cvtsi32_si128(*((int*)&b[5 * stride])); // 53 52 51 50
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r0 = _mm_unpacklo_epi32(r0, r4); // 43 42 41 40 03 02 01 00
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r1 = _mm_unpacklo_epi32(r1, r5); // 53 52 51 50 13 12 11 10
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// t1 = 53 43 52 42 51 41 50 40 13 03 12 02 11 01 10 00
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t1 = _mm_unpacklo_epi8(r0, r1);
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// Load 2nd, 3rd, 6th and 7th rows
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r0 = _mm_cvtsi32_si128(*((int*)&b[2 * stride])); // 23 22 21 22
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r1 = _mm_cvtsi32_si128(*((int*)&b[3 * stride])); // 33 32 31 30
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r4 = _mm_cvtsi32_si128(*((int*)&b[6 * stride])); // 63 62 61 60
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r5 = _mm_cvtsi32_si128(*((int*)&b[7 * stride])); // 73 72 71 70
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r0 = _mm_unpacklo_epi32(r0, r4); // 63 62 61 60 23 22 21 20
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r1 = _mm_unpacklo_epi32(r1, r5); // 73 72 71 70 33 32 31 30
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// t2 = 73 63 72 62 71 61 70 60 33 23 32 22 31 21 30 20
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t2 = _mm_unpacklo_epi8(r0, r1);
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// t1 = 33 23 13 03 32 22 12 02 31 21 11 01 30 20 10 00
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// t2 = 73 63 53 43 72 62 52 42 71 61 51 41 70 60 50 40
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r0 = t1;
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t1 = _mm_unpacklo_epi16(t1, t2);
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t2 = _mm_unpackhi_epi16(r0, t2);
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// *p = 71 61 51 41 31 21 11 01 70 60 50 40 30 20 10 00
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// *q = 73 63 53 43 33 23 13 03 72 62 52 42 32 22 12 02
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*p = _mm_unpacklo_epi32(t1, t2);
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*q = _mm_unpackhi_epi32(t1, t2);
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}
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static inline void Store4x4(__m128i* x, uint8_t* dst, int stride) {
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int i;
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for (i = 0; i < 4; ++i, dst += stride) {
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*((int32_t*)dst) = _mm_cvtsi128_si32(*x);
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*x = _mm_srli_si128(*x, 4);
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}
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}
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//-----------------------------------------------------------------------------
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// Simple In-loop filtering (Paragraph 15.2)
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static void SimpleVFilter16SSE2(uint8_t* p, int stride, int thresh) {
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__m128i op, oq;
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// Load
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const __m128i p1 = _mm_loadu_si128((__m128i*)&p[-2 * stride]);
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const __m128i p0 = _mm_loadu_si128((__m128i*)&p[-stride]);
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const __m128i q0 = _mm_loadu_si128((__m128i*)&p[0]);
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const __m128i q1 = _mm_loadu_si128((__m128i*)&p[stride]);
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DoFilter2SSE2(p1, p0, q0, q1, thresh, &op, &oq);
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// Store
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_mm_store_si128((__m128i*)&p[-stride], op);
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_mm_store_si128((__m128i*)p, oq);
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}
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static void SimpleHFilter16SSE2(uint8_t* p, int stride, int thresh) {
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__m128i t1, t2;
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__m128i p1, p0, q0, q1;
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// Assume the pixels around the edge (|) are numbered as follows
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// 00 01 | 02 03
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// 10 11 | 12 13
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// ... | ...
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// e0 e1 | e2 e3
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// f0 f1 | f2 f3
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p -= 2; // beginning of the first segment
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// Load
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// p1 = 71 61 51 41 31 21 11 01 70 60 50 40 30 20 10 00
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// q0 = 73 63 53 43 33 23 13 03 72 62 52 42 32 22 12 02
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// p0 = f1 e1 d1 c1 b1 a1 91 81 f0 e0 d0 c0 b0 a0 90 80
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// q1 = f3 e3 d3 c3 b3 a3 93 83 f2 e2 d2 c2 b2 a2 92 82
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Load8x4(p, stride, &p1, &q0);
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Load8x4(p + 8 * stride, stride, &p0, &q1);
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t1 = p1;
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t2 = q0;
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// p1 = f0 e0 d0 c0 b0 a0 90 80 70 60 50 40 30 20 10 00
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// p0 = f1 e1 d1 c1 b1 a1 91 81 71 61 51 41 31 21 11 01
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// q0 = f2 e2 d2 c2 b2 a2 92 82 72 62 52 42 32 22 12 02
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// q1 = f3 e3 d3 c3 b3 a3 93 83 73 63 53 43 33 23 13 03
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p1 = _mm_unpacklo_epi64(p1, p0);
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p0 = _mm_unpackhi_epi64(t1, p0);
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q0 = _mm_unpacklo_epi64(q0, q1);
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q1 = _mm_unpackhi_epi64(t2, q1);
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// Filter
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DoFilter2SSE2(p1, p0, q0, q1, thresh, &t1, &t2);
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// Transpose back to write out
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// p0 = 71 70 61 60 51 50 41 40 31 30 21 20 11 10 01 00
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// p1 = f1 f0 e1 e0 d1 d0 c1 c0 b1 b0 a1 a0 91 90 81 80
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// q0 = 73 72 63 62 53 52 43 42 33 32 23 22 13 12 03 02
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// q1 = f3 f2 e3 e2 d3 d2 c3 c2 b3 b2 a3 a2 93 92 83 82
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p0 = _mm_unpacklo_epi8(p1, t1);
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p1 = _mm_unpackhi_epi8(p1, t1);
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q0 = _mm_unpacklo_epi8(t2, q1);
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q1 = _mm_unpackhi_epi8(t2, q1);
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t1 = p0;
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t2 = p1;
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// p0 = 33 32 31 30 23 22 21 20 13 12 11 10 03 02 01 00
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// q0 = 73 72 71 70 63 62 61 60 53 52 51 50 43 42 41 40
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// p1 = b3 b2 b1 b0 a3 a2 a1 a0 93 92 91 90 83 82 81 80
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// q1 = f3 f2 f1 f0 e3 e2 e1 e0 d3 d2 d1 d0 c3 c2 c1 c0
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p0 = _mm_unpacklo_epi16(p0, q0);
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q0 = _mm_unpackhi_epi16(t1, q0);
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p1 = _mm_unpacklo_epi16(p1, q1);
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q1 = _mm_unpackhi_epi16(t2, q1);
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// Store
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Store4x4(&p0, p, stride);
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p += 4 * stride;
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Store4x4(&q0, p, stride);
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p += 4 * stride;
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Store4x4(&p1, p, stride);
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p += 4 * stride;
|
||||
Store4x4(&q1, p, stride);
|
||||
}
|
||||
|
||||
static void SimpleVFilter16iSSE2(uint8_t* p, int stride, int thresh) {
|
||||
int k;
|
||||
for (k = 3; k > 0; --k) {
|
||||
p += 4 * stride;
|
||||
SimpleVFilter16SSE2(p, stride, thresh);
|
||||
}
|
||||
}
|
||||
|
||||
static void SimpleHFilter16iSSE2(uint8_t* p, int stride, int thresh) {
|
||||
int k;
|
||||
for (k = 3; k > 0; --k) {
|
||||
p += 4;
|
||||
SimpleHFilter16SSE2(p, stride, thresh);
|
||||
}
|
||||
}
|
||||
|
||||
extern void VP8DspInitSSE2(void);
|
||||
|
||||
void VP8DspInitSSE2(void) {
|
||||
VP8SimpleVFilter16 = SimpleVFilter16SSE2;
|
||||
VP8SimpleHFilter16 = SimpleHFilter16SSE2;
|
||||
VP8SimpleVFilter16i = SimpleVFilter16iSSE2;
|
||||
VP8SimpleHFilter16i = SimpleHFilter16iSSE2;
|
||||
}
|
||||
|
||||
#if defined(__cplusplus) || defined(c_plusplus)
|
||||
} // extern "C"
|
||||
#endif
|
||||
|
||||
#endif //__SSE2__ || _MSC_VER
|
||||
@ -337,6 +337,14 @@ extern VP8LumaFilterFunc VP8HFilter16i;
|
||||
extern VP8ChromaFilterFunc VP8VFilter8i; // filtering u and v altogether
|
||||
extern VP8ChromaFilterFunc VP8HFilter8i;
|
||||
|
||||
typedef enum {
|
||||
kSSE2,
|
||||
kSSE3
|
||||
} CPUFeature;
|
||||
// returns true if the CPU supports the feature.
|
||||
typedef int (*VP8CPUInfo)(CPUFeature feature);
|
||||
extern VP8CPUInfo VP8DecGetCPUInfo;
|
||||
|
||||
//-----------------------------------------------------------------------------
|
||||
|
||||
#if defined(__cplusplus) || defined(c_plusplus)
|
||||
|
||||
@ -701,9 +701,9 @@ static int x86CPUInfo(CPUFeature feature) {
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
VP8CPUInfo VP8GetCPUInfo = x86CPUInfo;
|
||||
VP8CPUInfo VP8EncGetCPUInfo = x86CPUInfo;
|
||||
#else
|
||||
VP8CPUInfo VP8GetCPUInfo = NULL;
|
||||
VP8CPUInfo VP8EncGetCPUInfo = NULL;
|
||||
#endif
|
||||
|
||||
// Speed-critical function pointers. We have to initialize them to the default
|
||||
@ -753,13 +753,13 @@ void VP8EncDspInit(void) {
|
||||
VP8Copy16x16 = Copy16x16;
|
||||
|
||||
// If defined, use CPUInfo() to overwrite some pointers with faster versions.
|
||||
if (VP8GetCPUInfo) {
|
||||
if (VP8GetCPUInfo(kSSE2)) {
|
||||
if (VP8EncGetCPUInfo) {
|
||||
if (VP8EncGetCPUInfo(kSSE2)) {
|
||||
#if defined(__SSE2__) || defined(_MSC_VER)
|
||||
VP8EncDspInitSSE2();
|
||||
#endif
|
||||
}
|
||||
if (VP8GetCPUInfo(kSSE3)) {
|
||||
if (VP8EncGetCPUInfo(kSSE3)) {
|
||||
// later we'll plug some SSE3 variant here
|
||||
}
|
||||
}
|
||||
|
||||
@ -492,7 +492,7 @@ typedef enum {
|
||||
} CPUFeature;
|
||||
// returns true if the CPU supports the feature.
|
||||
typedef int (*VP8CPUInfo)(CPUFeature feature);
|
||||
extern VP8CPUInfo VP8GetCPUInfo;
|
||||
extern VP8CPUInfo VP8EncGetCPUInfo;
|
||||
|
||||
void VP8EncDspInit(void); // must be called before using any of the above
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user