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#include <libavcodec/avcodec.h>
#include "scale_test.h"
#include "video/image_writer.h"
#include "video/sws_utils.h"
static struct mp_image *gen_repack_test_img(int w, int h, int bytes, bool rgb,
bool alpha)
{
struct mp_regular_imgfmt planar_desc = {
.component_type = MP_COMPONENT_TYPE_UINT,
.component_size = bytes,
.forced_csp = rgb ? PL_COLOR_SYSTEM_RGB : 0,
.num_planes = alpha ? 4 : 3,
.planes = {
{1, {rgb ? 2 : 1}},
{1, {rgb ? 3 : 2}},
{1, {rgb ? 1 : 3}},
{1, {4}},
},
};
int mpfmt = mp_find_regular_imgfmt(&planar_desc);
assert(mpfmt);
struct mp_image *mpi = mp_image_alloc(mpfmt, w, h);
assert(mpi);
// Well, I have no idea what makes a good test image. So here's some crap.
// This contains bars/tiles of solid colors. For each of R/G/B, it toggles
// though 0/100% range, so 2*2*2 = 8 combinations (16 with alpha).
int b_h = 16, b_w = 16;
for (int y = 0; y < h; y++) {
for (int p = 0; p < mpi->num_planes; p++) {
void *line = mpi->planes[p] + mpi->stride[p] * (ptrdiff_t)y;
for (int x = 0; x < w; x += b_w) {
unsigned i = x / b_w + y / b_h * 2;
int c = ((i >> p) & 1);
if (bytes == 1) {
c *= (1 << 8) - 1;
for (int xs = x; xs < x + b_w; xs++)
((uint8_t *)line)[xs] = c;
} else if (bytes == 2) {
c *= (1 << 16) - 1;
for (int xs = x; xs < x + b_w; xs++)
((uint16_t *)line)[xs] = c;
}
}
}
}
return mpi;
}
static void dump_image(struct scale_test *stest, const char *name,
struct mp_image *img)
{
char *path = mp_tprintf(4096, "%s/%s.png", stest->outdir, name);
struct image_writer_opts opts = image_writer_opts_defaults;
opts.format = AV_CODEC_ID_PNG;
if (!write_image(img, &opts, path, NULL, NULL, true)) {
printf("Failed to write '%s'.\n", path);
abort();
}
}
// Compare 2 images (same format and size) for exact pixel data match.
// Does generally not work with formats that include undefined padding.
// Does not work with non-byte aligned formats.
static void assert_imgs_equal(struct scale_test *stest, FILE *f,
struct mp_image *ref, struct mp_image *new)
{
assert(ref->imgfmt == new->imgfmt);
assert(ref->w == new->w);
assert(ref->h == new->h);
assert(ref->fmt.flags & MP_IMGFLAG_BYTE_ALIGNED);
assert(ref->fmt.bpp[0]);
for (int p = 0; p < ref->num_planes; p++) {
for (int y = 0; y < ref->h; y++) {
void *line_r = ref->planes[p] + ref->stride[p] * (ptrdiff_t)y;
void *line_o = new->planes[p] + new->stride[p] * (ptrdiff_t)y;
size_t size = mp_image_plane_bytes(ref, p, 0, new->w);
bool ok = memcmp(line_r, line_o, size) == 0;
if (!ok) {
stest->fail += 1;
char *fn_a = mp_tprintf(80, "img%d_ref", stest->fail);
char *fn_b = mp_tprintf(80, "img%d_new", stest->fail);
fprintf(f, "Images mismatching, dumping to %s/%s\n", fn_a, fn_b);
dump_image(stest, fn_a, ref);
dump_image(stest, fn_b, new);
return;
}
}
}
}
void repack_test_run(struct scale_test *stest)
{
char *logname = mp_tprintf(80, "../%s.log", stest->test_name);
FILE *f = test_open_out(stest->outdir, logname);
if (!stest->sws) {
init_imgfmts_list();
stest->sws = mp_sws_alloc(stest);
stest->img_repack_rgb8 = gen_repack_test_img(256, 128, 1, true, false);
stest->img_repack_rgba8 = gen_repack_test_img(256, 128, 1, true, true);
stest->img_repack_rgb16 = gen_repack_test_img(256, 128, 2, true, false);
stest->img_repack_rgba16 = gen_repack_test_img(256, 128, 2, true, true);
talloc_steal(stest, stest->img_repack_rgb8);
talloc_steal(stest, stest->img_repack_rgba8);
talloc_steal(stest, stest->img_repack_rgb16);
talloc_steal(stest, stest->img_repack_rgba16);
}
for (int a = 0; a < num_imgfmts; a++) {
int mpfmt = imgfmts[a];
struct mp_imgfmt_desc fmtdesc = mp_imgfmt_get_desc(mpfmt);
struct mp_regular_imgfmt rdesc;
if (!mp_get_regular_imgfmt(&rdesc, mpfmt)) {
int ofmt = mp_find_other_endian(mpfmt);
if (!mp_get_regular_imgfmt(&rdesc, ofmt))
continue;
}
if (rdesc.num_planes > 1 || rdesc.forced_csp != PL_COLOR_SYSTEM_RGB)
continue;
struct mp_image *test_img = NULL;
bool alpha = fmtdesc.flags & MP_IMGFLAG_ALPHA;
bool hidepth = rdesc.component_size > 1;
if (alpha) {
test_img = hidepth ? stest->img_repack_rgba16 : stest->img_repack_rgba8;
} else {
test_img = hidepth ? stest->img_repack_rgb16 : stest->img_repack_rgb8;
}
if (test_img->imgfmt == mpfmt)
continue;
if (!stest->fns->supports_fmts(stest->fns_priv, mpfmt, test_img->imgfmt))
continue;
if (!mp_sws_supports_formats(stest->sws, mpfmt, test_img->imgfmt))
continue;
fprintf(f, "%s using %s\n", mp_imgfmt_to_name(mpfmt),
mp_imgfmt_to_name(test_img->imgfmt));
struct mp_image *dst = mp_image_alloc(mpfmt, test_img->w, test_img->h);
assert(dst);
// This tests packing.
bool ok = stest->fns->scale(stest->fns_priv, dst, test_img);
assert(ok);
// Cross-check with swscale in the other direction.
// (Mostly so we don't have to worry about padding.)
struct mp_image *src2 =
mp_image_alloc(test_img->imgfmt, test_img->w, test_img->h);
assert(src2);
ok = mp_sws_scale(stest->sws, src2, dst) >= 0;
assert_imgs_equal(stest, f, test_img, src2);
// Assume the other conversion direction also works.
assert(stest->fns->supports_fmts(stest->fns_priv, test_img->imgfmt, mpfmt));
struct mp_image *back = mp_image_alloc(test_img->imgfmt, dst->w, dst->h);
assert(back);
// This tests unpacking.
ok = stest->fns->scale(stest->fns_priv, back, dst);
assert(ok);
assert_imgs_equal(stest, f, test_img, back);
talloc_free(back);
talloc_free(src2);
talloc_free(dst);
}
fclose(f);
assert_text_files_equal(stest->refdir, stest->outdir, logname,
"This can fail if FFmpeg adds or removes pixfmts.");
}
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