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/*
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* FFmpeg 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <string.h>
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libswscale/swscale.h"
#include "libswscale/swscale_internal.h"
#include "checkasm.h"
#define randomize_buffers(buf, size) \
do { \
int j; \
for (j = 0; j < size; j+=4) \
AV_WN32(buf + j, rnd()); \
} while (0)
#define SRC_PIXELS 128
static void check_hscale(void)
{
#define MAX_FILTER_WIDTH 40
#define FILTER_SIZES 5
static const int filter_sizes[FILTER_SIZES] = { 4, 8, 16, 32, 40 };
#define HSCALE_PAIRS 2
static const int hscale_pairs[HSCALE_PAIRS][2] = {
{ 8, 14 },
{ 8, 18 },
};
int i, j, fsi, hpi, width;
struct SwsContext *ctx;
// padded
LOCAL_ALIGNED_32(uint8_t, src, [FFALIGN(SRC_PIXELS + MAX_FILTER_WIDTH - 1, 4)]);
LOCAL_ALIGNED_32(uint32_t, dst0, [SRC_PIXELS]);
LOCAL_ALIGNED_32(uint32_t, dst1, [SRC_PIXELS]);
// padded
LOCAL_ALIGNED_32(int16_t, filter, [SRC_PIXELS * MAX_FILTER_WIDTH + MAX_FILTER_WIDTH]);
LOCAL_ALIGNED_32(int32_t, filterPos, [SRC_PIXELS]);
// The dst parameter here is either int16_t or int32_t but we use void* to
// just cover both cases.
declare_func_emms(AV_CPU_FLAG_MMX, void, void *c, void *dst, int dstW,
const uint8_t *src, const int16_t *filter,
const int32_t *filterPos, int filterSize);
ctx = sws_alloc_context();
if (sws_init_context(ctx, NULL, NULL) < 0)
fail();
randomize_buffers(src, SRC_PIXELS + MAX_FILTER_WIDTH - 1);
for (hpi = 0; hpi < HSCALE_PAIRS; hpi++) {
for (fsi = 0; fsi < FILTER_SIZES; fsi++) {
width = filter_sizes[fsi];
ctx->srcBpc = hscale_pairs[hpi][0];
ctx->dstBpc = hscale_pairs[hpi][1];
ctx->hLumFilterSize = ctx->hChrFilterSize = width;
for (i = 0; i < SRC_PIXELS; i++) {
filterPos[i] = i;
// These filter cofficients are chosen to try break two corner
// cases, namely:
//
// - Negative filter coefficients. The filters output signed
// values, and it should be possible to end up with negative
// output values.
//
// - Positive clipping. The hscale filter function has clipping
// at (1<<15) - 1
//
// The coefficients sum to the 1.0 point for the hscale
// functions (1 << 14).
for (j = 0; j < width; j++) {
filter[i * width + j] = -((1 << 14) / (width - 1));
}
filter[i * width + (rnd() % width)] = ((1 << 15) - 1);
}
for (i = 0; i < MAX_FILTER_WIDTH; i++) {
// These values should be unused in SIMD implementations but
// may still be read, random coefficients here should help show
// issues where they are used in error.
filter[SRC_PIXELS * width + i] = rnd();
}
ff_getSwsFunc(ctx);
if (check_func(ctx->hcScale, "hscale_%d_to_%d_width%d", ctx->srcBpc, ctx->dstBpc + 1, width)) {
memset(dst0, 0, SRC_PIXELS * sizeof(dst0[0]));
memset(dst1, 0, SRC_PIXELS * sizeof(dst1[0]));
call_ref(NULL, dst0, SRC_PIXELS, src, filter, filterPos, width);
call_new(NULL, dst1, SRC_PIXELS, src, filter, filterPos, width);
if (memcmp(dst0, dst1, SRC_PIXELS * sizeof(dst0[0])))
fail();
bench_new(NULL, dst0, SRC_PIXELS, src, filter, filterPos, width);
}
}
}
sws_freeContext(ctx);
}
void checkasm_check_sw_scale(void)
{
check_hscale();
report("hscale");
}
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