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/*
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* Copyright (c) 2016 Martin Storsjo
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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 "checkasm.h"
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#include "libavcodec/avcodec.h"
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#include "libavcodec/h264dsp.h"
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#include "libavutil/common.h"
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#include "libavutil/internal.h"
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#include "libavutil/intreadwrite.h"
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static const uint32_t pixel_mask[3] = { 0xffffffff, 0x01ff01ff, 0x03ff03ff };
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#define SIZEOF_PIXEL ((bit_depth + 7) / 8)
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#define SIZEOF_COEF (2 * ((bit_depth + 7) / 8))
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#define PIXEL_STRIDE 16
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#define randomize_buffers() \
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do { \
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uint32_t mask = pixel_mask[bit_depth - 8]; \
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for (y = 0; y < sz; y++) { \
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for (x = 0; x < PIXEL_STRIDE; x += 4) { \
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AV_WN32A(src + y * PIXEL_STRIDE + x, rnd() & mask); \
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AV_WN32A(dst + y * PIXEL_STRIDE + x, rnd() & mask); \
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} \
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for (x = 0; x < sz; x++) { \
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if (bit_depth == 8) { \
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coef[y * sz + x] = src[y * PIXEL_STRIDE + x] - \
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dst[y * PIXEL_STRIDE + x]; \
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} else { \
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((int32_t *)coef)[y * sz + x] = \
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((uint16_t *)src)[y * (PIXEL_STRIDE/2) + x] - \
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((uint16_t *)dst)[y * (PIXEL_STRIDE/2) + x]; \
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} \
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} \
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} \
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} while (0)
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#define dct4x4_impl(size, dctcoef) \
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static void dct4x4_##size(dctcoef *coef) \
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{ \
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int i, y, x; \
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dctcoef tmp[16]; \
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for (i = 0; i < 4; i++) { \
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const int z0 = coef[i*4 + 0] + coef[i*4 + 3]; \
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const int z1 = coef[i*4 + 1] + coef[i*4 + 2]; \
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const int z2 = coef[i*4 + 0] - coef[i*4 + 3]; \
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const int z3 = coef[i*4 + 1] - coef[i*4 + 2]; \
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tmp[i + 4*0] = z0 + z1; \
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tmp[i + 4*1] = 2*z2 + z3; \
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tmp[i + 4*2] = z0 - z1; \
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tmp[i + 4*3] = z2 - 2*z3; \
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} \
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for (i = 0; i < 4; i++) { \
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const int z0 = tmp[i*4 + 0] + tmp[i*4 + 3]; \
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const int z1 = tmp[i*4 + 1] + tmp[i*4 + 2]; \
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const int z2 = tmp[i*4 + 0] - tmp[i*4 + 3]; \
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const int z3 = tmp[i*4 + 1] - tmp[i*4 + 2]; \
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coef[i*4 + 0] = z0 + z1; \
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coef[i*4 + 1] = 2*z2 + z3; \
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coef[i*4 + 2] = z0 - z1; \
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coef[i*4 + 3] = z2 - 2*z3; \
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} \
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for (y = 0; y < 4; y++) { \
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for (x = 0; x < 4; x++) { \
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static const int scale[] = { 13107 * 10, 8066 * 13, 5243 * 16 }; \
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const int idx = (y & 1) + (x & 1); \
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coef[y*4 + x] = (coef[y*4 + x] * scale[idx] + (1 << 14)) >> 15; \
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} \
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} \
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}
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#define DCT8_1D(src, srcstride, dst, dststride) do { \
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const int a0 = (src)[srcstride * 0] + (src)[srcstride * 7]; \
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const int a1 = (src)[srcstride * 0] - (src)[srcstride * 7]; \
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const int a2 = (src)[srcstride * 1] + (src)[srcstride * 6]; \
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const int a3 = (src)[srcstride * 1] - (src)[srcstride * 6]; \
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const int a4 = (src)[srcstride * 2] + (src)[srcstride * 5]; \
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const int a5 = (src)[srcstride * 2] - (src)[srcstride * 5]; \
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const int a6 = (src)[srcstride * 3] + (src)[srcstride * 4]; \
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const int a7 = (src)[srcstride * 3] - (src)[srcstride * 4]; \
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const int b0 = a0 + a6; \
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const int b1 = a2 + a4; \
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const int b2 = a0 - a6; \
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const int b3 = a2 - a4; \
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const int b4 = a3 + a5 + (a1 + (a1 >> 1)); \
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const int b5 = a1 - a7 - (a5 + (a5 >> 1)); \
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const int b6 = a1 + a7 - (a3 + (a3 >> 1)); \
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const int b7 = a3 - a5 + (a7 + (a7 >> 1)); \
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(dst)[dststride * 0] = b0 + b1; \
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(dst)[dststride * 1] = b4 + (b7 >> 2); \
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(dst)[dststride * 2] = b2 + (b3 >> 1); \
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(dst)[dststride * 3] = b5 + (b6 >> 2); \
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(dst)[dststride * 4] = b0 - b1; \
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(dst)[dststride * 5] = b6 - (b5 >> 2); \
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(dst)[dststride * 6] = (b2 >> 1) - b3; \
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(dst)[dststride * 7] = (b4 >> 2) - b7; \
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} while (0)
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#define dct8x8_impl(size, dctcoef) \
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static void dct8x8_##size(dctcoef *coef) \
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{ \
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int i, x, y; \
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dctcoef tmp[64]; \
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for (i = 0; i < 8; i++) \
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DCT8_1D(coef + i, 8, tmp + i, 8); \
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\
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for (i = 0; i < 8; i++) \
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DCT8_1D(tmp + 8*i, 1, coef + i, 8); \
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\
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for (y = 0; y < 8; y++) { \
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for (x = 0; x < 8; x++) { \
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static const int scale[] = { \
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13107 * 20, 11428 * 18, 20972 * 32, \
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12222 * 19, 16777 * 25, 15481 * 24, \
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}; \
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static const int idxmap[] = { \
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0, 3, 4, 3, \
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3, 1, 5, 1, \
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4, 5, 2, 5, \
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3, 1, 5, 1, \
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}; \
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const int idx = idxmap[(y & 3) * 4 + (x & 3)]; \
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coef[y*8 + x] = ((int64_t)coef[y*8 + x] * \
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scale[idx] + (1 << 17)) >> 18; \
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} \
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} \
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}
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dct4x4_impl(16, int16_t)
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dct4x4_impl(32, int32_t)
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dct8x8_impl(16, int16_t)
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dct8x8_impl(32, int32_t)
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static void dct4x4(int16_t *coef, int bit_depth)
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{
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if (bit_depth == 8)
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dct4x4_16(coef);
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else
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dct4x4_32((int32_t *) coef);
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}
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static void dct8x8(int16_t *coef, int bit_depth)
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{
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if (bit_depth == 8) {
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dct8x8_16(coef);
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} else {
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dct8x8_32((int32_t *) coef);
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}
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}
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static void check_idct(void)
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{
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LOCAL_ALIGNED_16(uint8_t, src, [8 * 8 * 2]);
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LOCAL_ALIGNED_16(uint8_t, dst, [8 * 8 * 2]);
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LOCAL_ALIGNED_16(uint8_t, dst0, [8 * 8 * 2]);
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LOCAL_ALIGNED_16(uint8_t, dst1_base, [8 * 8 * 2 + 32]);
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LOCAL_ALIGNED_16(int16_t, coef, [8 * 8 * 2]);
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LOCAL_ALIGNED_16(int16_t, subcoef0, [8 * 8 * 2]);
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LOCAL_ALIGNED_16(int16_t, subcoef1, [8 * 8 * 2]);
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H264DSPContext h;
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int bit_depth, sz, align;
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int x, y, dc;
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declare_func_emms(AV_CPU_FLAG_MMX, void, uint8_t *dst, int16_t *block, int stride);
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for (bit_depth = 8; bit_depth <= 10; bit_depth++) {
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ff_h264dsp_init(&h, bit_depth, 1);
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for (sz = 4; sz <= 8; sz += 4) {
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randomize_buffers();
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if (sz == 4)
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dct4x4(coef, bit_depth);
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else
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dct8x8(coef, bit_depth);
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for (dc = 0; dc <= 1; dc++) {
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void (*idct)(uint8_t *, int16_t *, int) = NULL;
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switch ((sz << 1) | dc) {
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case (4 << 1) | 0: idct = h.h264_idct_add; break;
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case (4 << 1) | 1: idct = h.h264_idct_dc_add; break;
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case (8 << 1) | 0: idct = h.h264_idct8_add; break;
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case (8 << 1) | 1: idct = h.h264_idct8_dc_add; break;
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}
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if (check_func(idct, "h264_idct%d_add%s_%dbpp", sz, dc ? "_dc" : "", bit_depth)) {
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for (align = 0; align < 16; align += sz * SIZEOF_PIXEL) {
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uint8_t *dst1 = dst1_base + align;
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if (dc) {
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memset(subcoef0, 0, sz * sz * SIZEOF_COEF);
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memcpy(subcoef0, coef, SIZEOF_COEF);
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} else {
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memcpy(subcoef0, coef, sz * sz * SIZEOF_COEF);
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}
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memcpy(dst0, dst, sz * PIXEL_STRIDE);
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memcpy(dst1, dst, sz * PIXEL_STRIDE);
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memcpy(subcoef1, subcoef0, sz * sz * SIZEOF_COEF);
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call_ref(dst0, subcoef0, PIXEL_STRIDE);
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call_new(dst1, subcoef1, PIXEL_STRIDE);
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if (memcmp(dst0, dst1, sz * PIXEL_STRIDE) ||
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memcmp(subcoef0, subcoef1, sz * sz * SIZEOF_COEF))
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fail();
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bench_new(dst1, subcoef1, sz * SIZEOF_PIXEL);
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}
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}
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}
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}
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}
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report("idct");
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}
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void checkasm_check_h264dsp(void)
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{
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check_idct();
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}
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