diff options
Diffstat (limited to 'libavutil/pixelutils.c')
| -rw-r--r-- | libavutil/pixelutils.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/libavutil/pixelutils.c b/libavutil/pixelutils.c new file mode 100644 index 0000000000..1ec4fbb0ec --- /dev/null +++ b/libavutil/pixelutils.c @@ -0,0 +1,222 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser 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 "config.h" +#include "common.h" +#include "pixelutils.h" +#include "internal.h" + +#if CONFIG_PIXELUTILS + +#include "x86/pixelutils.h" + +static av_always_inline int sad_wxh(const uint8_t *src1, ptrdiff_t stride1, + const uint8_t *src2, ptrdiff_t stride2, + int w, int h) +{ + int x, y, sum = 0; + + for (y = 0; y < h; y++) { + for (x = 0; x < w; x++) + sum += abs(src1[x] - src2[x]); + src1 += stride1; + src2 += stride2; + } + return sum; +} + +#define DECLARE_BLOCK_FUNCTIONS(size) \ +static int block_sad_##size##x##size##_c(const uint8_t *src1, ptrdiff_t stride1, \ + const uint8_t *src2, ptrdiff_t stride2) \ +{ \ + return sad_wxh(src1, stride1, src2, stride2, size, size); \ +} + +DECLARE_BLOCK_FUNCTIONS(2) +DECLARE_BLOCK_FUNCTIONS(4) +DECLARE_BLOCK_FUNCTIONS(8) +DECLARE_BLOCK_FUNCTIONS(16) + +static const av_pixelutils_sad_fn sad_c[] = { + block_sad_2x2_c, + block_sad_4x4_c, + block_sad_8x8_c, + block_sad_16x16_c, +}; + +#endif /* CONFIG_PIXELUTILS */ + +av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx) +{ +#if !CONFIG_PIXELUTILS + av_log(log_ctx, AV_LOG_ERROR, "pixelutils support is required " + "but libavutil is not compiled with it\n"); + return NULL; +#else + av_pixelutils_sad_fn sad[FF_ARRAY_ELEMS(sad_c)]; + + memcpy(sad, sad_c, sizeof(sad)); + + if (w_bits < 1 || w_bits > FF_ARRAY_ELEMS(sad) || + h_bits < 1 || h_bits > FF_ARRAY_ELEMS(sad)) + return NULL; + if (w_bits != h_bits) // only squared sad for now + return NULL; + +#if ARCH_X86 + ff_pixelutils_sad_init_x86(sad, aligned); +#endif + + return sad[w_bits - 1]; +#endif +} + +#ifdef TEST +#define W1 320 +#define H1 240 +#define W2 640 +#define H2 480 + +static int run_single_test(const char *test, + const uint8_t *block1, ptrdiff_t stride1, + const uint8_t *block2, ptrdiff_t stride2, + int align, int n) +{ + int out, ref; + av_pixelutils_sad_fn f_ref = sad_c[n - 1]; + av_pixelutils_sad_fn f_out = av_pixelutils_get_sad_fn(n, n, align, NULL); + + switch (align) { + case 0: block1++; block2++; break; + case 1: block2++; break; + case 2: break; + } + + out = f_out(block1, stride1, block2, stride2); + ref = f_ref(block1, stride1, block2, stride2); + printf("[%s] [%c%c] SAD [%s] %dx%d=%d ref=%d\n", + out == ref ? "OK" : "FAIL", + align ? 'A' : 'U', align == 2 ? 'A' : 'U', + test, 1<<n, 1<<n, out, ref); + return out != ref; +} + +static int run_test(const char *test, + const uint8_t *b1, const uint8_t *b2) +{ + int i, a, ret = 0; + + for (a = 0; a < 3; a++) { + const uint8_t *block1 = b1; + const uint8_t *block2 = b2; + + switch (a) { + case 0: block1++; block2++; break; + case 1: block2++; break; + case 2: break; + } + for (i = 1; i <= FF_ARRAY_ELEMS(sad_c); i++) { + int r = run_single_test(test, b1, W1, b2, W2, a, i); + if (r) + ret = r; + } + } + return ret; +} + +int main(void) +{ + int i, align, ret; + uint8_t *buf1 = av_malloc(W1*H1); + uint8_t *buf2 = av_malloc(W2*H2); + uint32_t state = 0; + + if (!buf1 || !buf2) { + fprintf(stderr, "malloc failure\n"); + ret = 1; + goto end; + } + + ff_check_pixfmt_descriptors(); + +#define RANDOM_INIT(buf, size) do { \ + int k; \ + for (k = 0; k < size; k++) { \ + state = state * 1664525 + 1013904223; \ + buf[k] = state>>24; \ + } \ +} while (0) + + /* Normal test with different strides */ + RANDOM_INIT(buf1, W1*H1); + RANDOM_INIT(buf2, W2*H2); + ret = run_test("random", buf1, buf2); + if (ret < 0) + goto end; + + /* Check for maximum SAD */ + memset(buf1, 0xff, W1*H1); + memset(buf2, 0x00, W2*H2); + ret = run_test("max", buf1, buf2); + if (ret < 0) + goto end; + + /* Check for minimum SAD */ + memset(buf1, 0x90, W1*H1); + memset(buf2, 0x90, W2*H2); + ret = run_test("min", buf1, buf2); + if (ret < 0) + goto end; + + /* Exact buffer sizes, to check for overreads */ + for (i = 1; i <= 4; i++) { + for (align = 0; align < 3; align++) { + int size1, size2; + + av_freep(&buf1); + av_freep(&buf2); + + size1 = size2 = 1 << (i << 1); + + switch (align) { + case 0: size1++; size2++; break; + case 1: size2++; break; + case 2: break; + } + + buf1 = av_malloc(size1); + buf2 = av_malloc(size2); + if (!buf1 || !buf2) { + fprintf(stderr, "malloc failure\n"); + ret = 1; + goto end; + } + RANDOM_INIT(buf1, size1); + RANDOM_INIT(buf2, size2); + ret = run_single_test("small", buf1, 1<<i, buf2, 1<<i, align, i); + if (ret < 0) + goto end; + } + } + +end: + av_free(buf1); + av_free(buf2); + return ret; +} +#endif /* TEST */ |