mirror of
https://github.com/FFmpeg/FFmpeg.git
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245 lines
9.4 KiB
C
245 lines
9.4 KiB
C
/*
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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 <string.h>
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mem_internal.h"
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#include "libswscale/swscale.h"
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#include "libswscale/swscale_internal.h"
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#include "checkasm.h"
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#define randomize_buffers(buf, size) \
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do { \
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int j; \
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for (j = 0; j < size; j+=4) \
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AV_WN32(buf + j, rnd()); \
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} while (0)
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// This reference function is the same approximate algorithm employed by the
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// SIMD functions
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static void ref_function(const int16_t *filter, int filterSize,
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const int16_t **src, uint8_t *dest, int dstW,
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const uint8_t *dither, int offset)
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{
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int i, d;
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d = ((filterSize - 1) * 8 + dither[0]) >> 4;
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for ( i = 0; i < dstW; i++) {
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int16_t val = d;
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int j;
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union {
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int val;
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int16_t v[2];
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} t;
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for (j = 0; j < filterSize; j++){
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t.val = (int)src[j][i + offset] * (int)filter[j];
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val += t.v[1];
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}
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dest[i]= av_clip_uint8(val>>3);
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}
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}
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static void check_yuv2yuvX(void)
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{
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struct SwsContext *ctx;
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int fsi, osi, isi, i, j;
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int dstW;
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#define LARGEST_FILTER 16
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#define FILTER_SIZES 4
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static const int filter_sizes[FILTER_SIZES] = {1, 4, 8, 16};
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#define LARGEST_INPUT_SIZE 512
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#define INPUT_SIZES 6
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static const int input_sizes[INPUT_SIZES] = {8, 24, 128, 144, 256, 512};
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declare_func_emms(AV_CPU_FLAG_MMX, void, const int16_t *filter,
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int filterSize, const int16_t **src, uint8_t *dest,
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int dstW, const uint8_t *dither, int offset);
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const int16_t **src;
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LOCAL_ALIGNED_8(int16_t, src_pixels, [LARGEST_FILTER * LARGEST_INPUT_SIZE]);
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LOCAL_ALIGNED_8(int16_t, filter_coeff, [LARGEST_FILTER]);
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LOCAL_ALIGNED_8(uint8_t, dst0, [LARGEST_INPUT_SIZE]);
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LOCAL_ALIGNED_8(uint8_t, dst1, [LARGEST_INPUT_SIZE]);
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LOCAL_ALIGNED_8(uint8_t, dither, [LARGEST_INPUT_SIZE]);
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union VFilterData{
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const int16_t *src;
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uint16_t coeff[8];
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} *vFilterData;
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uint8_t d_val = rnd();
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memset(dither, d_val, LARGEST_INPUT_SIZE);
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randomize_buffers((uint8_t*)src_pixels, LARGEST_FILTER * LARGEST_INPUT_SIZE * sizeof(int16_t));
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randomize_buffers((uint8_t*)filter_coeff, LARGEST_FILTER * sizeof(int16_t));
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ctx = sws_alloc_context();
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if (sws_init_context(ctx, NULL, NULL) < 0)
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fail();
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ff_sws_init_scale(ctx);
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for(isi = 0; isi < INPUT_SIZES; ++isi){
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dstW = input_sizes[isi];
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for(osi = 0; osi < 64; osi += 16){
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for(fsi = 0; fsi < FILTER_SIZES; ++fsi){
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src = av_malloc(sizeof(int16_t*) * filter_sizes[fsi]);
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vFilterData = av_malloc((filter_sizes[fsi] + 2) * sizeof(union VFilterData));
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memset(vFilterData, 0, (filter_sizes[fsi] + 2) * sizeof(union VFilterData));
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for(i = 0; i < filter_sizes[fsi]; ++i){
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src[i] = &src_pixels[i * LARGEST_INPUT_SIZE];
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vFilterData[i].src = src[i];
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for(j = 0; j < 4; ++j)
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vFilterData[i].coeff[j + 4] = filter_coeff[i];
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}
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if (check_func(ctx->yuv2planeX, "yuv2yuvX_%d_%d_%d", filter_sizes[fsi], osi, dstW)){
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memset(dst0, 0, LARGEST_INPUT_SIZE * sizeof(dst0[0]));
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memset(dst1, 0, LARGEST_INPUT_SIZE * sizeof(dst1[0]));
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// The reference function is not the scalar function selected when mmx
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// is deactivated as the SIMD functions do not give the same result as
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// the scalar ones due to rounding. The SIMD functions are activated by
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// the flag SWS_ACCURATE_RND
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ref_function(&filter_coeff[0], filter_sizes[fsi], src, dst0, dstW - osi, dither, osi);
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// There's no point in calling new for the reference function
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if(ctx->use_mmx_vfilter){
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call_new((const int16_t*)vFilterData, filter_sizes[fsi], src, dst1, dstW - osi, dither, osi);
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if (memcmp(dst0, dst1, LARGEST_INPUT_SIZE * sizeof(dst0[0])))
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fail();
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if(dstW == LARGEST_INPUT_SIZE)
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bench_new((const int16_t*)vFilterData, filter_sizes[fsi], src, dst1, dstW - osi, dither, osi);
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}
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}
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av_freep(&src);
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av_freep(&vFilterData);
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}
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}
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}
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sws_freeContext(ctx);
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#undef FILTER_SIZES
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}
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#undef SRC_PIXELS
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#define SRC_PIXELS 512
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static void check_hscale(void)
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{
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#define MAX_FILTER_WIDTH 40
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#define FILTER_SIZES 6
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static const int filter_sizes[FILTER_SIZES] = { 4, 8, 12, 16, 32, 40 };
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#define HSCALE_PAIRS 2
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static const int hscale_pairs[HSCALE_PAIRS][2] = {
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{ 8, 14 },
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{ 8, 18 },
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};
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int i, j, fsi, hpi, width;
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struct SwsContext *ctx;
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// padded
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LOCAL_ALIGNED_32(uint8_t, src, [FFALIGN(SRC_PIXELS + MAX_FILTER_WIDTH - 1, 4)]);
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LOCAL_ALIGNED_32(uint32_t, dst0, [SRC_PIXELS]);
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LOCAL_ALIGNED_32(uint32_t, dst1, [SRC_PIXELS]);
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// padded
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LOCAL_ALIGNED_32(int16_t, filter, [SRC_PIXELS * MAX_FILTER_WIDTH + MAX_FILTER_WIDTH]);
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LOCAL_ALIGNED_32(int32_t, filterPos, [SRC_PIXELS]);
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LOCAL_ALIGNED_32(int16_t, filterAvx2, [SRC_PIXELS * MAX_FILTER_WIDTH + MAX_FILTER_WIDTH]);
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LOCAL_ALIGNED_32(int32_t, filterPosAvx, [SRC_PIXELS]);
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// The dst parameter here is either int16_t or int32_t but we use void* to
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// just cover both cases.
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declare_func_emms(AV_CPU_FLAG_MMX, void, void *c, void *dst, int dstW,
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const uint8_t *src, const int16_t *filter,
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const int32_t *filterPos, int filterSize);
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int cpu_flags = av_get_cpu_flags();
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ctx = sws_alloc_context();
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if (sws_init_context(ctx, NULL, NULL) < 0)
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fail();
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randomize_buffers(src, SRC_PIXELS + MAX_FILTER_WIDTH - 1);
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for (hpi = 0; hpi < HSCALE_PAIRS; hpi++) {
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for (fsi = 0; fsi < FILTER_SIZES; fsi++) {
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width = filter_sizes[fsi];
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ctx->srcBpc = hscale_pairs[hpi][0];
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ctx->dstBpc = hscale_pairs[hpi][1];
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ctx->hLumFilterSize = ctx->hChrFilterSize = width;
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ctx->dstW = ctx->chrDstW = SRC_PIXELS;
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for (i = 0; i < SRC_PIXELS; i++) {
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filterPos[i] = i;
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filterPosAvx[i] = i;
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// These filter cofficients are chosen to try break two corner
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// cases, namely:
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//
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// - Negative filter coefficients. The filters output signed
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// values, and it should be possible to end up with negative
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// output values.
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//
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// - Positive clipping. The hscale filter function has clipping
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// at (1<<15) - 1
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//
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// The coefficients sum to the 1.0 point for the hscale
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// functions (1 << 14).
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for (j = 0; j < width; j++) {
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filter[i * width + j] = -((1 << 14) / (width - 1));
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}
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filter[i * width + (rnd() % width)] = ((1 << 15) - 1);
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}
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for (i = 0; i < MAX_FILTER_WIDTH; i++) {
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// These values should be unused in SIMD implementations but
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// may still be read, random coefficients here should help show
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// issues where they are used in error.
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filter[SRC_PIXELS * width + i] = rnd();
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}
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ff_sws_init_scale(ctx);
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memcpy(filterAvx2, filter, sizeof(uint16_t) * (SRC_PIXELS * MAX_FILTER_WIDTH + MAX_FILTER_WIDTH));
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if (cpu_flags & AV_CPU_FLAG_AVX2)
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ff_shuffle_filter_coefficients(ctx, filterPosAvx, width, filterAvx2, SRC_PIXELS);
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if (check_func(ctx->hcScale, "hscale_%d_to_%d_width%d", ctx->srcBpc, ctx->dstBpc + 1, width)) {
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memset(dst0, 0, SRC_PIXELS * sizeof(dst0[0]));
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memset(dst1, 0, SRC_PIXELS * sizeof(dst1[0]));
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call_ref(NULL, dst0, SRC_PIXELS, src, filter, filterPos, width);
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call_new(NULL, dst1, SRC_PIXELS, src, filterAvx2, filterPosAvx, width);
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if (memcmp(dst0, dst1, SRC_PIXELS * sizeof(dst0[0])))
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fail();
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bench_new(NULL, dst0, SRC_PIXELS, src, filter, filterPosAvx, width);
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}
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}
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}
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sws_freeContext(ctx);
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}
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void checkasm_check_sw_scale(void)
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{
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check_hscale();
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report("hscale");
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check_yuv2yuvX();
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report("yuv2yuvX");
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}
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