From: Alexandra Hajkova <alexan...@khirnov.net>
---
libavcodec/hevcdsp.c | 2 +
libavcodec/hevcdsp.h | 1 +
libavcodec/ppc/Makefile | 1 +
libavcodec/ppc/hevcdsp.c | 110 ++++++++++++++++++++++++++++++++++++++
libavcodec/ppc/hevcdsp_template.c | 48 +++++++++++++++++
5 files changed, 162 insertions(+)
create mode 100644 libavcodec/ppc/hevcdsp.c
create mode 100644 libavcodec/ppc/hevcdsp_template.c
diff --git a/libavcodec/hevcdsp.c b/libavcodec/hevcdsp.c
index 7c19198..8ae023b 100644
--- a/libavcodec/hevcdsp.c
+++ b/libavcodec/hevcdsp.c
@@ -245,6 +245,8 @@ void ff_hevc_dsp_init(HEVCDSPContext *hevcdsp, int
bit_depth)
break;
}
+ if (ARCH_PPC)
+ ff_hevc_dsp_init_ppc(hevcdsp, bit_depth);
if (ARCH_X86)
ff_hevc_dsp_init_x86(hevcdsp, bit_depth);
}
diff --git a/libavcodec/hevcdsp.h b/libavcodec/hevcdsp.h
index 49cb711..2f4ff01 100644
--- a/libavcodec/hevcdsp.h
+++ b/libavcodec/hevcdsp.h
@@ -115,6 +115,7 @@ typedef struct HEVCDSPContext {
void ff_hevc_dsp_init(HEVCDSPContext *hpc, int bit_depth);
+void ff_hevc_dsp_init_ppc(HEVCDSPContext *c, const int bit_depth);
void ff_hevc_dsp_init_x86(HEVCDSPContext *c, const int bit_depth);
extern const int16_t ff_hevc_epel_coeffs[7][16];
diff --git a/libavcodec/ppc/Makefile b/libavcodec/ppc/Makefile
index 09eabcb..4b92add 100644
--- a/libavcodec/ppc/Makefile
+++ b/libavcodec/ppc/Makefile
@@ -25,6 +25,7 @@ OBJS-$(CONFIG_VP8DSP) += ppc/vp8dsp_altivec.o
# decoders/encoders
OBJS-$(CONFIG_APE_DECODER) += ppc/apedsp_altivec.o
+OBJS-$(CONFIG_HEVC_DECODER) += ppc/hevcdsp.o
OBJS-$(CONFIG_SVQ1_ENCODER) += ppc/svq1enc_altivec.o
OBJS-$(CONFIG_VORBIS_DECODER) += ppc/vorbisdsp_altivec.o
OBJS-$(CONFIG_VP7_DECODER) += ppc/vp8dsp_altivec.o
diff --git a/libavcodec/ppc/hevcdsp.c b/libavcodec/ppc/hevcdsp.c
new file mode 100644
index 0000000..c95af67
--- /dev/null
+++ b/libavcodec/ppc/hevcdsp.c
@@ -0,0 +1,110 @@
+/* SIMD-optimized IDCT functions for HEVC decoding
+ * Copyright (c) Alexandra Hajkova
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#if HAVE_ALTIVEC_H
+#include <altivec.h>
+#endif
+
+#include "libavutil/cpu.h"
+#if HAVE_ALTIVEC_H
+#include "libavutil/ppc/cpu.h"
+#include "libavutil/ppc/types_altivec.h"
+#include "libavutil/ppc/util_altivec.h"
+#endif
+
+#include "libavcodec/hevcdsp.h"
+
+#if HAVE_ALTIVEC
+#define FUNCDECL(a, depth) a ## _ ## depth ## _altivec
+#define FUNC(a, b) FUNCDECL(a, b)
+
+static const vector int16_t trans4[4] = {
+ { 64, 64, 64, 64, 64, 64, 64, 64 },
+ { 83, 36, 83, 36, 83, 36, 83, 36 },
+ { 64, -64, 64, -64, 64, -64, 64, -64 },
+ { 36, -83, 36, -83, 36, -83, 36, -83 },
+};
+
+static const vec_u8 mask[2] = {
+ { 0x00, 0x01, 0x08, 0x09, 0x10, 0x11, 0x18, 0x19, 0x02, 0x03, 0x0A, 0x0B,
0x12, 0x13, 0x1A, 0x1B },
+ { 0x04, 0x05, 0x0C, 0x0D, 0x14, 0x15, 0x1C, 0x1D, 0x06, 0x07, 0x0E, 0x0F,
0x16, 0x17, 0x1E, 0x1F },
+};
+
+static void transform4x4(vector int16_t src_01, vector int16_t src_23,
+ vector int32_t res[4], const int shift, int16_t
*coeffs)
+{
+ vector int16_t src_02, src_13;
+ vector int32_t zero = vec_splat_s32(0);
+ vector int32_t e0, o0, e1, o1;
+ vector int32_t add;
+
+ src_13 = vec_mergel(src_01, src_23);
+ src_02 = vec_mergeh(src_01, src_23);
+
+ e0 = vec_msums(src_02, trans4[0], zero);
+ o0 = vec_msums(src_13, trans4[1], zero);
+ e1 = vec_msums(src_02, trans4[2], zero);
+ o1 = vec_msums(src_13, trans4[3], zero);
+
+ add = vec_sl(vec_splat_s32(1), vec_splat_u32(shift - 1));
+ e0 = vec_add(e0, add);
+ e1 = vec_add(e1, add);
+
+ res[0] = vec_add(e0, o0);
+ res[1] = vec_add(e1, o1);
+ res[2] = vec_sub(e1, o1);
+ res[3] = vec_sub(e0, o0);
+}
+
+static void scale(vector int32_t res[4], vector int16_t res_packed[2], int
shift)
+{
+ int i;
+ vector unsigned int v_shift = vec_splat_u32(shift);
+
+ for (i = 0; i < 4; i++)
+ res[i] = vec_sra(res[i], v_shift);
+
+ // clip16
+ res_packed[0] = vec_packs(res[0], res[1]);
+ res_packed[1] = vec_packs(res[2], res[3]);
+}
+
+#define BIT_DEPTH 8
+#include "libavcodec/ppc/hevcdsp_template.c"
+#undef BIT_DEPTH
+
+#define BIT_DEPTH 10
+#include "libavcodec/ppc/hevcdsp_template.c"
+#undef BIT_DEPTH
+#endif /* HAVE_ALTIVEC */
+
+av_cold void ff_hevc_dsp_init_ppc(HEVCDSPContext *c, const int bit_depth)
+{
+#if HAVE_ALTIVEC
+ if (!PPC_ALTIVEC(av_get_cpu_flags()))
+ return;
+
+ if (bit_depth == 8)
+ c->idct[0] = ff_hevc_idct_4x4_8_altivec;
+ if (bit_depth == 10)
+ c->idct[0] = ff_hevc_idct_4x4_10_altivec;
+#endif /* HAVE_ALTIVEC */
+}
diff --git a/libavcodec/ppc/hevcdsp_template.c
b/libavcodec/ppc/hevcdsp_template.c
new file mode 100644
index 0000000..a68ee18
--- /dev/null
+++ b/libavcodec/ppc/hevcdsp_template.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) Alexandra Hajkova
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+static void FUNC(ff_hevc_idct_4x4, BIT_DEPTH)(int16_t *coeffs, int col_limit)
+{
+ const int shift = 7;
+ const int shift2 = 20 - BIT_DEPTH;
+ vector int16_t src_01, src_23;
+ vector int32_t res[4];
+ vector int16_t res_packed[2];
+
+ src_01 = vec_ld(0, coeffs);
+ src_23 = vec_ld(16, coeffs);
+
+ transform4x4(src_01, src_23, res, shift, coeffs);
+ src_01 = vec_packs(res[0], res[1]);
+ src_23 = vec_packs(res[2], res[3]);
+ scale(res, res_packed, shift);
+ // transpose
+ src_01 = vec_perm(res_packed[0], res_packed[1], mask[0]);
+ src_23 = vec_perm(res_packed[0], res_packed[1], mask[1]);
+
+ transform4x4(src_01, src_23, res, shift2, coeffs);
+ scale(res, res_packed, shift2);
+ // transpose
+ src_01 = vec_perm(res_packed[0], res_packed[1], mask[0]);
+ src_23 = vec_perm(res_packed[0], res_packed[1], mask[1]);
+
+ vec_st(src_01, 0, coeffs);
+ vec_st(src_23, 16, coeffs);
+}
--
2.7.4
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