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-rw-r--r--media/ffvpx/libavcodec/simple_idct_template.c371
1 files changed, 371 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/simple_idct_template.c b/media/ffvpx/libavcodec/simple_idct_template.c
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@@ -0,0 +1,371 @@
+/*
+ * Simple IDCT
+ *
+ * Copyright (c) 2001 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * simpleidct in C.
+ */
+
+/* Based upon some commented-out C code from mpeg2dec (idct_mmx.c
+ * written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>). */
+
+#include "simple_idct.h"
+
+#include "bit_depth_template.c"
+
+#undef W1
+#undef W2
+#undef W3
+#undef W4
+#undef W5
+#undef W6
+#undef W7
+#undef ROW_SHIFT
+#undef COL_SHIFT
+#undef DC_SHIFT
+#undef MUL
+#undef MAC
+
+#if BIT_DEPTH == 8
+
+#define W1 22725 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
+#define W2 21407 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
+#define W3 19266 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
+#define W4 16383 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
+#define W5 12873 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
+#define W6 8867 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
+#define W7 4520 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
+
+#define ROW_SHIFT 11
+#define COL_SHIFT 20
+#define DC_SHIFT 3
+
+#define MUL(a, b) MUL16(a, b)
+#define MAC(a, b, c) MAC16(a, b, c)
+
+#elif BIT_DEPTH == 10 || BIT_DEPTH == 12
+
+# if BIT_DEPTH == 10
+#define W1 22725 // 90901
+#define W2 21407 // 85627
+#define W3 19265 // 77062
+#define W4 16384 // 65535
+#define W5 12873 // 51491
+#define W6 8867 // 35468
+#define W7 4520 // 18081
+
+# ifdef EXTRA_SHIFT
+#define ROW_SHIFT 13
+#define COL_SHIFT 18
+#define DC_SHIFT 1
+# elif IN_IDCT_DEPTH == 32
+#define ROW_SHIFT 13
+#define COL_SHIFT 21
+#define DC_SHIFT 2
+# else
+#define ROW_SHIFT 12
+#define COL_SHIFT 19
+#define DC_SHIFT 2
+# endif
+
+# else
+#define W1 45451
+#define W2 42813
+#define W3 38531
+#define W4 32767
+#define W5 25746
+#define W6 17734
+#define W7 9041
+
+#define ROW_SHIFT 16
+#define COL_SHIFT 17
+#define DC_SHIFT -1
+# endif
+
+#define MUL(a, b) ((int)((SUINT)(a) * (b)))
+#define MAC(a, b, c) ((a) += (SUINT)(b) * (c))
+
+#else
+
+#error "Unsupported bitdepth"
+
+#endif
+
+#ifdef EXTRA_SHIFT
+static inline void FUNC(idctRowCondDC_extrashift)(int16_t *row, int extra_shift)
+#else
+static inline void FUNC6(idctRowCondDC)(idctin *row, int extra_shift)
+#endif
+{
+ SUINT a0, a1, a2, a3, b0, b1, b2, b3;
+
+// TODO: Add DC-only support for int32_t input
+#if IN_IDCT_DEPTH == 16
+#if HAVE_FAST_64BIT
+#define ROW0_MASK (0xffffULL << 48 * HAVE_BIGENDIAN)
+ if (((AV_RN64A(row) & ~ROW0_MASK) | AV_RN64A(row+4)) == 0) {
+ uint64_t temp;
+ if (DC_SHIFT - extra_shift >= 0) {
+ temp = (row[0] * (1 << (DC_SHIFT - extra_shift))) & 0xffff;
+ } else {
+ temp = ((row[0] + (1<<(extra_shift - DC_SHIFT-1))) >> (extra_shift - DC_SHIFT)) & 0xffff;
+ }
+ temp += temp * (1 << 16);
+ temp += temp * ((uint64_t) 1 << 32);
+ AV_WN64A(row, temp);
+ AV_WN64A(row + 4, temp);
+ return;
+ }
+#else
+ if (!(AV_RN32A(row+2) |
+ AV_RN32A(row+4) |
+ AV_RN32A(row+6) |
+ row[1])) {
+ uint32_t temp;
+ if (DC_SHIFT - extra_shift >= 0) {
+ temp = (row[0] * (1 << (DC_SHIFT - extra_shift))) & 0xffff;
+ } else {
+ temp = ((row[0] + (1<<(extra_shift - DC_SHIFT-1))) >> (extra_shift - DC_SHIFT)) & 0xffff;
+ }
+ temp += temp * (1 << 16);
+ AV_WN32A(row, temp);
+ AV_WN32A(row+2, temp);
+ AV_WN32A(row+4, temp);
+ AV_WN32A(row+6, temp);
+ return;
+ }
+#endif
+#endif
+
+ a0 = ((SUINT)W4 * row[0]) + (1 << (ROW_SHIFT + extra_shift - 1));
+ a1 = a0;
+ a2 = a0;
+ a3 = a0;
+
+ a0 += (SUINT)W2 * row[2];
+ a1 += (SUINT)W6 * row[2];
+ a2 -= (SUINT)W6 * row[2];
+ a3 -= (SUINT)W2 * row[2];
+
+ b0 = MUL(W1, row[1]);
+ MAC(b0, W3, row[3]);
+ b1 = MUL(W3, row[1]);
+ MAC(b1, -W7, row[3]);
+ b2 = MUL(W5, row[1]);
+ MAC(b2, -W1, row[3]);
+ b3 = MUL(W7, row[1]);
+ MAC(b3, -W5, row[3]);
+
+#if IN_IDCT_DEPTH == 32
+ if (AV_RN64A(row + 4) | AV_RN64A(row + 6)) {
+#else
+ if (AV_RN64A(row + 4)) {
+#endif
+ a0 += (SUINT) W4*row[4] + (SUINT)W6*row[6];
+ a1 += (SUINT)- W4*row[4] - (SUINT)W2*row[6];
+ a2 += (SUINT)- W4*row[4] + (SUINT)W2*row[6];
+ a3 += (SUINT) W4*row[4] - (SUINT)W6*row[6];
+
+ MAC(b0, W5, row[5]);
+ MAC(b0, W7, row[7]);
+
+ MAC(b1, -W1, row[5]);
+ MAC(b1, -W5, row[7]);
+
+ MAC(b2, W7, row[5]);
+ MAC(b2, W3, row[7]);
+
+ MAC(b3, W3, row[5]);
+ MAC(b3, -W1, row[7]);
+ }
+
+ row[0] = (int)(a0 + b0) >> (ROW_SHIFT + extra_shift);
+ row[7] = (int)(a0 - b0) >> (ROW_SHIFT + extra_shift);
+ row[1] = (int)(a1 + b1) >> (ROW_SHIFT + extra_shift);
+ row[6] = (int)(a1 - b1) >> (ROW_SHIFT + extra_shift);
+ row[2] = (int)(a2 + b2) >> (ROW_SHIFT + extra_shift);
+ row[5] = (int)(a2 - b2) >> (ROW_SHIFT + extra_shift);
+ row[3] = (int)(a3 + b3) >> (ROW_SHIFT + extra_shift);
+ row[4] = (int)(a3 - b3) >> (ROW_SHIFT + extra_shift);
+}
+
+#define IDCT_COLS do { \
+ a0 = (SUINT)W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4)); \
+ a1 = a0; \
+ a2 = a0; \
+ a3 = a0; \
+ \
+ a0 += (SUINT) W2*col[8*2]; \
+ a1 += (SUINT) W6*col[8*2]; \
+ a2 += (SUINT)-W6*col[8*2]; \
+ a3 += (SUINT)-W2*col[8*2]; \
+ \
+ b0 = MUL(W1, col[8*1]); \
+ b1 = MUL(W3, col[8*1]); \
+ b2 = MUL(W5, col[8*1]); \
+ b3 = MUL(W7, col[8*1]); \
+ \
+ MAC(b0, W3, col[8*3]); \
+ MAC(b1, -W7, col[8*3]); \
+ MAC(b2, -W1, col[8*3]); \
+ MAC(b3, -W5, col[8*3]); \
+ \
+ if (col[8*4]) { \
+ a0 += (SUINT) W4*col[8*4]; \
+ a1 += (SUINT)-W4*col[8*4]; \
+ a2 += (SUINT)-W4*col[8*4]; \
+ a3 += (SUINT) W4*col[8*4]; \
+ } \
+ \
+ if (col[8*5]) { \
+ MAC(b0, W5, col[8*5]); \
+ MAC(b1, -W1, col[8*5]); \
+ MAC(b2, W7, col[8*5]); \
+ MAC(b3, W3, col[8*5]); \
+ } \
+ \
+ if (col[8*6]) { \
+ a0 += (SUINT) W6*col[8*6]; \
+ a1 += (SUINT)-W2*col[8*6]; \
+ a2 += (SUINT) W2*col[8*6]; \
+ a3 += (SUINT)-W6*col[8*6]; \
+ } \
+ \
+ if (col[8*7]) { \
+ MAC(b0, W7, col[8*7]); \
+ MAC(b1, -W5, col[8*7]); \
+ MAC(b2, W3, col[8*7]); \
+ MAC(b3, -W1, col[8*7]); \
+ } \
+ } while (0)
+
+#ifdef EXTRA_SHIFT
+static inline void FUNC(idctSparseCol_extrashift)(int16_t *col)
+#else
+static inline void FUNC6(idctSparseColPut)(pixel *dest, ptrdiff_t line_size,
+ idctin *col)
+{
+ SUINT a0, a1, a2, a3, b0, b1, b2, b3;
+
+ IDCT_COLS;
+
+ dest[0] = av_clip_pixel((int)(a0 + b0) >> COL_SHIFT);
+ dest += line_size;
+ dest[0] = av_clip_pixel((int)(a1 + b1) >> COL_SHIFT);
+ dest += line_size;
+ dest[0] = av_clip_pixel((int)(a2 + b2) >> COL_SHIFT);
+ dest += line_size;
+ dest[0] = av_clip_pixel((int)(a3 + b3) >> COL_SHIFT);
+ dest += line_size;
+ dest[0] = av_clip_pixel((int)(a3 - b3) >> COL_SHIFT);
+ dest += line_size;
+ dest[0] = av_clip_pixel((int)(a2 - b2) >> COL_SHIFT);
+ dest += line_size;
+ dest[0] = av_clip_pixel((int)(a1 - b1) >> COL_SHIFT);
+ dest += line_size;
+ dest[0] = av_clip_pixel((int)(a0 - b0) >> COL_SHIFT);
+}
+
+static inline void FUNC6(idctSparseColAdd)(pixel *dest, ptrdiff_t line_size,
+ idctin *col)
+{
+ unsigned a0, a1, a2, a3, b0, b1, b2, b3;
+
+ IDCT_COLS;
+
+ dest[0] = av_clip_pixel(dest[0] + ((int)(a0 + b0) >> COL_SHIFT));
+ dest += line_size;
+ dest[0] = av_clip_pixel(dest[0] + ((int)(a1 + b1) >> COL_SHIFT));
+ dest += line_size;
+ dest[0] = av_clip_pixel(dest[0] + ((int)(a2 + b2) >> COL_SHIFT));
+ dest += line_size;
+ dest[0] = av_clip_pixel(dest[0] + ((int)(a3 + b3) >> COL_SHIFT));
+ dest += line_size;
+ dest[0] = av_clip_pixel(dest[0] + ((int)(a3 - b3) >> COL_SHIFT));
+ dest += line_size;
+ dest[0] = av_clip_pixel(dest[0] + ((int)(a2 - b2) >> COL_SHIFT));
+ dest += line_size;
+ dest[0] = av_clip_pixel(dest[0] + ((int)(a1 - b1) >> COL_SHIFT));
+ dest += line_size;
+ dest[0] = av_clip_pixel(dest[0] + ((int)(a0 - b0) >> COL_SHIFT));
+}
+
+static inline void FUNC6(idctSparseCol)(idctin *col)
+#endif
+{
+ unsigned a0, a1, a2, a3, b0, b1, b2, b3;
+
+ IDCT_COLS;
+
+ col[0 ] = ((int)(a0 + b0) >> COL_SHIFT);
+ col[8 ] = ((int)(a1 + b1) >> COL_SHIFT);
+ col[16] = ((int)(a2 + b2) >> COL_SHIFT);
+ col[24] = ((int)(a3 + b3) >> COL_SHIFT);
+ col[32] = ((int)(a3 - b3) >> COL_SHIFT);
+ col[40] = ((int)(a2 - b2) >> COL_SHIFT);
+ col[48] = ((int)(a1 - b1) >> COL_SHIFT);
+ col[56] = ((int)(a0 - b0) >> COL_SHIFT);
+}
+
+#ifndef EXTRA_SHIFT
+void FUNC6(ff_simple_idct_put)(uint8_t *dest_, ptrdiff_t line_size, int16_t *block_)
+{
+ idctin *block = (idctin *)block_;
+ pixel *dest = (pixel *)dest_;
+ int i;
+
+ line_size /= sizeof(pixel);
+
+ for (i = 0; i < 8; i++)
+ FUNC6(idctRowCondDC)(block + i*8, 0);
+
+ for (i = 0; i < 8; i++)
+ FUNC6(idctSparseColPut)(dest + i, line_size, block + i);
+}
+
+#if IN_IDCT_DEPTH == 16
+void FUNC6(ff_simple_idct_add)(uint8_t *dest_, ptrdiff_t line_size, int16_t *block)
+{
+ pixel *dest = (pixel *)dest_;
+ int i;
+
+ line_size /= sizeof(pixel);
+
+ for (i = 0; i < 8; i++)
+ FUNC6(idctRowCondDC)(block + i*8, 0);
+
+ for (i = 0; i < 8; i++)
+ FUNC6(idctSparseColAdd)(dest + i, line_size, block + i);
+}
+
+void FUNC6(ff_simple_idct)(int16_t *block)
+{
+ int i;
+
+ for (i = 0; i < 8; i++)
+ FUNC6(idctRowCondDC)(block + i*8, 0);
+
+ for (i = 0; i < 8; i++)
+ FUNC6(idctSparseCol)(block + i);
+}
+#endif
+#endif
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