making act segmenter

1 files changed, 328 insertions, 0 deletions

diff --git a/ffmpeg/libswscale/ppc/swscale_altivec.c b/ffmpeg/libswscale/ppc/swscale_altivec.c
new file mode 100644
index 0000000..9ca2868
--- /dev/null
+++ b/ffmpeg/libswscale/ppc/swscale_altivec.c
@@ -0,0 +1,328 @@
+/*
+ * AltiVec-enhanced yuv2yuvX
+ *
+ * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org>
+ * based on the equivalent C code in swscale.c
+ *
+ * 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 <inttypes.h>
+
+#include "config.h"
+#include "libswscale/swscale.h"
+#include "libswscale/swscale_internal.h"
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "yuv2rgb_altivec.h"
+
+#define vzero vec_splat_s32(0)
+
+#define yuv2planeX_8(d1, d2, l1, src, x, perm, filter) do {     \
+        vector signed short l2  = vec_ld(((x) << 1) + 16, src); \
+        vector signed short ls  = vec_perm(l1, l2, perm);       \
+        vector signed int   i1  = vec_mule(filter, ls);         \
+        vector signed int   i2  = vec_mulo(filter, ls);         \
+        vector signed int   vf1 = vec_mergeh(i1, i2);           \
+        vector signed int   vf2 = vec_mergel(i1, i2);           \
+        d1 = vec_add(d1, vf1);                                  \
+        d2 = vec_add(d2, vf2);                                  \
+        l1 = l2;                                                \
+    } while (0)
+
+static void yuv2planeX_16_altivec(const int16_t *filter, int filterSize,
+                                  const int16_t **src, uint8_t *dest,
+                                  const uint8_t *dither, int offset, int x)
+{
+    register int i, j;
+    DECLARE_ALIGNED(16, int, val)[16];
+    vector signed int vo1, vo2, vo3, vo4;
+    vector unsigned short vs1, vs2;
+    vector unsigned char vf;
+    vector unsigned int altivec_vectorShiftInt19 =
+        vec_add(vec_splat_u32(10), vec_splat_u32(9));
+
+    for (i = 0; i < 16; i++)
+        val[i] = dither[(x + i + offset) & 7] << 12;
+
+    vo1 = vec_ld(0,  val);
+    vo2 = vec_ld(16, val);
+    vo3 = vec_ld(32, val);
+    vo4 = vec_ld(48, val);
+
+    for (j = 0; j < filterSize; j++) {
+        vector signed short l1, vLumFilter = vec_ld(j << 1, filter);
+        vector unsigned char perm, perm0 = vec_lvsl(j << 1, filter);
+        vLumFilter = vec_perm(vLumFilter, vLumFilter, perm0);
+        vLumFilter = vec_splat(vLumFilter, 0); // lumFilter[j] is loaded 8 times in vLumFilter
+
+        perm = vec_lvsl(x << 1, src[j]);
+        l1   = vec_ld(x << 1, src[j]);
+
+        yuv2planeX_8(vo1, vo2, l1, src[j], x,     perm, vLumFilter);
+        yuv2planeX_8(vo3, vo4, l1, src[j], x + 8, perm, vLumFilter);
+    }
+
+    vo1 = vec_sra(vo1, altivec_vectorShiftInt19);
+    vo2 = vec_sra(vo2, altivec_vectorShiftInt19);
+    vo3 = vec_sra(vo3, altivec_vectorShiftInt19);
+    vo4 = vec_sra(vo4, altivec_vectorShiftInt19);
+    vs1 = vec_packsu(vo1, vo2);
+    vs2 = vec_packsu(vo3, vo4);
+    vf  = vec_packsu(vs1, vs2);
+    vec_st(vf, 0, dest);
+}
+
+static inline void yuv2planeX_u(const int16_t *filter, int filterSize,
+                                const int16_t **src, uint8_t *dest, int dstW,
+                                const uint8_t *dither, int offset, int x)
+{
+    int i, j;
+
+    for (i = x; i < dstW; i++) {
+        int t = dither[(i + offset) & 7] << 12;
+        for (j = 0; j < filterSize; j++)
+            t += src[j][i] * filter[j];
+        dest[i] = av_clip_uint8(t >> 19);
+    }
+}
+
+static void yuv2planeX_altivec(const int16_t *filter, int filterSize,
+                               const int16_t **src, uint8_t *dest, int dstW,
+                               const uint8_t *dither, int offset)
+{
+    int dst_u = -(uintptr_t)dest & 15;
+    int i;
+
+    yuv2planeX_u(filter, filterSize, src, dest, dst_u, dither, offset, 0);
+
+    for (i = dst_u; i < dstW - 15; i += 16)
+        yuv2planeX_16_altivec(filter, filterSize, src, dest + i, dither,
+                              offset, i);
+
+    yuv2planeX_u(filter, filterSize, src, dest, dstW, dither, offset, i);
+}
+
+static void hScale_altivec_real(SwsContext *c, int16_t *dst, int dstW,
+                                const uint8_t *src, const int16_t *filter,
+                                const int32_t *filterPos, int filterSize)
+{
+    register int i;
+    DECLARE_ALIGNED(16, int, tempo)[4];
+
+    if (filterSize % 4) {
+        for (i = 0; i < dstW; i++) {
+            register int j;
+            register int srcPos = filterPos[i];
+            register int val    = 0;
+            for (j = 0; j < filterSize; j++)
+                val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
+            dst[i] = FFMIN(val >> 7, (1 << 15) - 1);
+        }
+    } else
+        switch (filterSize) {
+        case 4:
+            for (i = 0; i < dstW; i++) {
+                register int srcPos = filterPos[i];
+
+                vector unsigned char src_v0 = vec_ld(srcPos, src);
+                vector unsigned char src_v1, src_vF;
+                vector signed short src_v, filter_v;
+                vector signed int val_vEven, val_s;
+                if ((((uintptr_t)src + srcPos) % 16) > 12) {
+                    src_v1 = vec_ld(srcPos + 16, src);
+                }
+                src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
+
+                src_v = // vec_unpackh sign-extends...
+                        (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
+                // now put our elements in the even slots
+                src_v = vec_mergeh(src_v, (vector signed short)vzero);
+
+                filter_v = vec_ld(i << 3, filter);
+                // The 3 above is 2 (filterSize == 4) + 1 (sizeof(short) == 2).
+
+                // The neat trick: We only care for half the elements,
+                // high or low depending on (i<<3)%16 (it's 0 or 8 here),
+                // and we're going to use vec_mule, so we choose
+                // carefully how to "unpack" the elements into the even slots.
+                if ((i << 3) % 16)
+                    filter_v = vec_mergel(filter_v, (vector signed short)vzero);
+                else
+                    filter_v = vec_mergeh(filter_v, (vector signed short)vzero);
+
+                val_vEven = vec_mule(src_v, filter_v);
+                val_s     = vec_sums(val_vEven, vzero);
+                vec_st(val_s, 0, tempo);
+                dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
+            }
+        break;
+
+        case 8:
+            for (i = 0; i < dstW; i++) {
+                register int srcPos = filterPos[i];
+
+                vector unsigned char src_v0 = vec_ld(srcPos, src);
+                vector unsigned char src_v1, src_vF;
+                vector signed short src_v, filter_v;
+                vector signed int val_v, val_s;
+                if ((((uintptr_t)src + srcPos) % 16) > 8) {
+                    src_v1 = vec_ld(srcPos + 16, src);
+                }
+                src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
+
+                src_v = // vec_unpackh sign-extends...
+                        (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
+                filter_v = vec_ld(i << 4, filter);
+                // the 4 above is 3 (filterSize == 8) + 1 (sizeof(short) == 2)
+
+                val_v = vec_msums(src_v, filter_v, (vector signed int)vzero);
+                val_s = vec_sums(val_v, vzero);
+                vec_st(val_s, 0, tempo);
+                dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
+            }
+        break;
+
+        case 16:
+            for (i = 0; i < dstW; i++) {
+                register int srcPos = filterPos[i];
+
+                vector unsigned char src_v0 = vec_ld(srcPos, src);
+                vector unsigned char src_v1 = vec_ld(srcPos + 16, src);
+                vector unsigned char src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
+
+                vector signed short src_vA = // vec_unpackh sign-extends...
+                                             (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
+                vector signed short src_vB = // vec_unpackh sign-extends...
+                                             (vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF));
+
+                vector signed short filter_v0 = vec_ld(i << 5, filter);
+                vector signed short filter_v1 = vec_ld((i << 5) + 16, filter);
+                // the 5 above are 4 (filterSize == 16) + 1 (sizeof(short) == 2)
+
+                vector signed int val_acc = vec_msums(src_vA, filter_v0, (vector signed int)vzero);
+                vector signed int val_v   = vec_msums(src_vB, filter_v1, val_acc);
+
+                vector signed int val_s = vec_sums(val_v, vzero);
+
+                vec_st(val_s, 0, tempo);
+                dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
+            }
+        break;
+
+        default:
+            for (i = 0; i < dstW; i++) {
+                register int j;
+                register int srcPos = filterPos[i];
+
+                vector signed int val_s, val_v = (vector signed int)vzero;
+                vector signed short filter_v0R = vec_ld(i * 2 * filterSize, filter);
+                vector unsigned char permF     = vec_lvsl((i * 2 * filterSize), filter);
+
+                vector unsigned char src_v0 = vec_ld(srcPos, src);
+                vector unsigned char permS  = vec_lvsl(srcPos, src);
+
+                for (j = 0; j < filterSize - 15; j += 16) {
+                    vector unsigned char src_v1 = vec_ld(srcPos + j + 16, src);
+                    vector unsigned char src_vF = vec_perm(src_v0, src_v1, permS);
+
+                    vector signed short src_vA = // vec_unpackh sign-extends...
+                                                 (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
+                    vector signed short src_vB = // vec_unpackh sign-extends...
+                                                 (vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF));
+
+                    vector signed short filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter);
+                    vector signed short filter_v2R = vec_ld((i * 2 * filterSize) + (j * 2) + 32, filter);
+                    vector signed short filter_v0  = vec_perm(filter_v0R, filter_v1R, permF);
+                    vector signed short filter_v1  = vec_perm(filter_v1R, filter_v2R, permF);
+
+                    vector signed int val_acc = vec_msums(src_vA, filter_v0, val_v);
+                    val_v = vec_msums(src_vB, filter_v1, val_acc);
+
+                    filter_v0R = filter_v2R;
+                    src_v0     = src_v1;
+                }
+
+                if (j < filterSize - 7) {
+                    // loading src_v0 is useless, it's already done above
+                    // vector unsigned char src_v0 = vec_ld(srcPos + j, src);
+                    vector unsigned char src_v1, src_vF;
+                    vector signed short src_v, filter_v1R, filter_v;
+                    if ((((uintptr_t)src + srcPos) % 16) > 8) {
+                        src_v1 = vec_ld(srcPos + j + 16, src);
+                    }
+                    src_vF = vec_perm(src_v0, src_v1, permS);
+
+                    src_v = // vec_unpackh sign-extends...
+                            (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
+                    // loading filter_v0R is useless, it's already done above
+                    // vector signed short filter_v0R = vec_ld((i * 2 * filterSize) + j, filter);
+                    filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter);
+                    filter_v   = vec_perm(filter_v0R, filter_v1R, permF);
+
+                    val_v = vec_msums(src_v, filter_v, val_v);
+                }
+
+                val_s = vec_sums(val_v, vzero);
+
+                vec_st(val_s, 0, tempo);
+                dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
+            }
+        }
+}
+
+av_cold void ff_sws_init_swScale_altivec(SwsContext *c)
+{
+    enum AVPixelFormat dstFormat = c->dstFormat;
+
+    if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
+        return;
+
+    if (c->srcBpc == 8 && c->dstBpc <= 14) {
+        c->hyScale = c->hcScale = hScale_altivec_real;
+    }
+    if (!is16BPS(dstFormat) && !is9_OR_10BPS(dstFormat) &&
+        dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
+        !c->alpPixBuf) {
+        c->yuv2planeX = yuv2planeX_altivec;
+    }
+
+    /* The following list of supported dstFormat values should
+     * match what's found in the body of ff_yuv2packedX_altivec() */
+    if (!(c->flags & (SWS_BITEXACT | SWS_FULL_CHR_H_INT)) && !c->alpPixBuf) {
+        switch (c->dstFormat) {
+        case AV_PIX_FMT_ABGR:
+            c->yuv2packedX = ff_yuv2abgr_X_altivec;
+            break;
+        case AV_PIX_FMT_BGRA:
+            c->yuv2packedX = ff_yuv2bgra_X_altivec;
+            break;
+        case AV_PIX_FMT_ARGB:
+            c->yuv2packedX = ff_yuv2argb_X_altivec;
+            break;
+        case AV_PIX_FMT_RGBA:
+            c->yuv2packedX = ff_yuv2rgba_X_altivec;
+            break;
+        case AV_PIX_FMT_BGR24:
+            c->yuv2packedX = ff_yuv2bgr24_X_altivec;
+            break;
+        case AV_PIX_FMT_RGB24:
+            c->yuv2packedX = ff_yuv2rgb24_X_altivec;
+            break;
+        }
+    }
+}