making act segmenter

1 files changed, 324 insertions, 0 deletions

diff --git a/ffmpeg/libavcodec/simple_idct_template.c b/ffmpeg/libavcodec/simple_idct_template.c
new file mode 100644
index 0000000..dabfbda
--- /dev/null
+++ b/ffmpeg/libavcodec/simple_idct_template.c
@@ -0,0 +1,324 @@
+/*
+ * 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 outcommented c code from mpeg2dec (idct_mmx.c
+  written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>)
+ */
+
+#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
+
+#define W1 90901
+#define W2 85627
+#define W3 77062
+#define W4 65535
+#define W5 51491
+#define W6 35468
+#define W7 18081
+
+#define ROW_SHIFT 15
+#define COL_SHIFT 20
+#define DC_SHIFT 1
+
+#define MUL(a, b)    ((a) * (b))
+#define MAC(a, b, c) ((a) += (b) * (c))
+
+#else
+
+#error "Unsupported bitdepth"
+
+#endif
+
+static inline void FUNC(idctRowCondDC)(int16_t *row, int extra_shift)
+{
+    int a0, a1, a2, a3, b0, b1, b2, b3;
+
+#if HAVE_FAST_64BIT
+#define ROW0_MASK (0xffffLL << 48 * HAVE_BIGENDIAN)
+    if (((((uint64_t *)row)[0] & ~ROW0_MASK) | ((uint64_t *)row)[1]) == 0) {
+        uint64_t temp;
+        if (DC_SHIFT - extra_shift > 0) {
+            temp = (row[0] << (DC_SHIFT - extra_shift)) & 0xffff;
+        } else {
+            temp = (row[0] >> (extra_shift - DC_SHIFT)) & 0xffff;
+        }
+        temp += temp << 16;
+        temp += temp << 32;
+        ((uint64_t *)row)[0] = temp;
+        ((uint64_t *)row)[1] = temp;
+        return;
+    }
+#else
+    if (!(((uint32_t*)row)[1] |
+          ((uint32_t*)row)[2] |
+          ((uint32_t*)row)[3] |
+          row[1])) {
+        uint32_t temp;
+        if (DC_SHIFT - extra_shift > 0) {
+            temp = (row[0] << (DC_SHIFT - extra_shift)) & 0xffff;
+        } else {
+            temp = (row[0] >> (extra_shift - DC_SHIFT)) & 0xffff;
+        }
+        temp += temp << 16;
+        ((uint32_t*)row)[0]=((uint32_t*)row)[1] =
+            ((uint32_t*)row)[2]=((uint32_t*)row)[3] = temp;
+        return;
+    }
+#endif
+
+    a0 = (W4 * row[0]) + (1 << (ROW_SHIFT - 1));
+    a1 = a0;
+    a2 = a0;
+    a3 = a0;
+
+    a0 += W2 * row[2];
+    a1 += W6 * row[2];
+    a2 -= W6 * row[2];
+    a3 -= 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 (AV_RN64A(row + 4)) {
+        a0 +=   W4*row[4] + W6*row[6];
+        a1 += - W4*row[4] - W2*row[6];
+        a2 += - W4*row[4] + W2*row[6];
+        a3 +=   W4*row[4] - 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] = (a0 + b0) >> (ROW_SHIFT + extra_shift);
+    row[7] = (a0 - b0) >> (ROW_SHIFT + extra_shift);
+    row[1] = (a1 + b1) >> (ROW_SHIFT + extra_shift);
+    row[6] = (a1 - b1) >> (ROW_SHIFT + extra_shift);
+    row[2] = (a2 + b2) >> (ROW_SHIFT + extra_shift);
+    row[5] = (a2 - b2) >> (ROW_SHIFT + extra_shift);
+    row[3] = (a3 + b3) >> (ROW_SHIFT + extra_shift);
+    row[4] = (a3 - b3) >> (ROW_SHIFT + extra_shift);
+}
+
+#define IDCT_COLS do {                                  \
+        a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4)); \
+        a1 = a0;                                        \
+        a2 = a0;                                        \
+        a3 = a0;                                        \
+                                                        \
+        a0 +=  W2*col[8*2];                             \
+        a1 +=  W6*col[8*2];                             \
+        a2 += -W6*col[8*2];                             \
+        a3 += -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 +=  W4*col[8*4];                         \
+            a1 += -W4*col[8*4];                         \
+            a2 += -W4*col[8*4];                         \
+            a3 +=  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 +=  W6*col[8*6];                         \
+            a1 += -W2*col[8*6];                         \
+            a2 +=  W2*col[8*6];                         \
+            a3 += -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)
+
+static inline void FUNC(idctSparseColPut)(pixel *dest, int line_size,
+                                          int16_t *col)
+{
+    int a0, a1, a2, a3, b0, b1, b2, b3;
+
+    IDCT_COLS;
+
+    dest[0] = av_clip_pixel((a0 + b0) >> COL_SHIFT);
+    dest += line_size;
+    dest[0] = av_clip_pixel((a1 + b1) >> COL_SHIFT);
+    dest += line_size;
+    dest[0] = av_clip_pixel((a2 + b2) >> COL_SHIFT);
+    dest += line_size;
+    dest[0] = av_clip_pixel((a3 + b3) >> COL_SHIFT);
+    dest += line_size;
+    dest[0] = av_clip_pixel((a3 - b3) >> COL_SHIFT);
+    dest += line_size;
+    dest[0] = av_clip_pixel((a2 - b2) >> COL_SHIFT);
+    dest += line_size;
+    dest[0] = av_clip_pixel((a1 - b1) >> COL_SHIFT);
+    dest += line_size;
+    dest[0] = av_clip_pixel((a0 - b0) >> COL_SHIFT);
+}
+
+static inline void FUNC(idctSparseColAdd)(pixel *dest, int line_size,
+                                          int16_t *col)
+{
+    int a0, a1, a2, a3, b0, b1, b2, b3;
+
+    IDCT_COLS;
+
+    dest[0] = av_clip_pixel(dest[0] + ((a0 + b0) >> COL_SHIFT));
+    dest += line_size;
+    dest[0] = av_clip_pixel(dest[0] + ((a1 + b1) >> COL_SHIFT));
+    dest += line_size;
+    dest[0] = av_clip_pixel(dest[0] + ((a2 + b2) >> COL_SHIFT));
+    dest += line_size;
+    dest[0] = av_clip_pixel(dest[0] + ((a3 + b3) >> COL_SHIFT));
+    dest += line_size;
+    dest[0] = av_clip_pixel(dest[0] + ((a3 - b3) >> COL_SHIFT));
+    dest += line_size;
+    dest[0] = av_clip_pixel(dest[0] + ((a2 - b2) >> COL_SHIFT));
+    dest += line_size;
+    dest[0] = av_clip_pixel(dest[0] + ((a1 - b1) >> COL_SHIFT));
+    dest += line_size;
+    dest[0] = av_clip_pixel(dest[0] + ((a0 - b0) >> COL_SHIFT));
+}
+
+static inline void FUNC(idctSparseCol)(int16_t *col)
+{
+    int a0, a1, a2, a3, b0, b1, b2, b3;
+
+    IDCT_COLS;
+
+    col[0 ] = ((a0 + b0) >> COL_SHIFT);
+    col[8 ] = ((a1 + b1) >> COL_SHIFT);
+    col[16] = ((a2 + b2) >> COL_SHIFT);
+    col[24] = ((a3 + b3) >> COL_SHIFT);
+    col[32] = ((a3 - b3) >> COL_SHIFT);
+    col[40] = ((a2 - b2) >> COL_SHIFT);
+    col[48] = ((a1 - b1) >> COL_SHIFT);
+    col[56] = ((a0 - b0) >> COL_SHIFT);
+}
+
+void FUNC(ff_simple_idct_put)(uint8_t *dest_, int line_size, int16_t *block)
+{
+    pixel *dest = (pixel *)dest_;
+    int i;
+
+    line_size /= sizeof(pixel);
+
+    for (i = 0; i < 8; i++)
+        FUNC(idctRowCondDC)(block + i*8, 0);
+
+    for (i = 0; i < 8; i++)
+        FUNC(idctSparseColPut)(dest + i, line_size, block + i);
+}
+
+void FUNC(ff_simple_idct_add)(uint8_t *dest_, int line_size, int16_t *block)
+{
+    pixel *dest = (pixel *)dest_;
+    int i;
+
+    line_size /= sizeof(pixel);
+
+    for (i = 0; i < 8; i++)
+        FUNC(idctRowCondDC)(block + i*8, 0);
+
+    for (i = 0; i < 8; i++)
+        FUNC(idctSparseColAdd)(dest + i, line_size, block + i);
+}
+
+void FUNC(ff_simple_idct)(int16_t *block)
+{
+    int i;
+
+    for (i = 0; i < 8; i++)
+        FUNC(idctRowCondDC)(block + i*8, 0);
+
+    for (i = 0; i < 8; i++)
+        FUNC(idctSparseCol)(block + i);
+}