avfilter/vf_hflip: Move ff_hflip_init into a header

This removes a dependency of checkasm on lavfi/vf_hflip.o
and also allows to inline ff_hflip_init() irrespectively of
interposing.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 110 insertions, 0 deletions

diff --git a/libavfilter/vf_hflip_init.h b/libavfilter/vf_hflip_init.h
new file mode 100644
index 0000000000..b58cfec901
--- /dev/null
+++ b/libavfilter/vf_hflip_init.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2007 Benoit Fouet
+ * Copyright (c) 2010 Stefano Sabatini
+ *
+ * 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
+ */
+
+#ifndef AVFILTER_HFLIP_INIT_H
+#define AVFILTER_HFLIP_INIT_H
+
+#include <stdint.h>
+
+#include "config.h"
+#include "libavutil/attributes.h"
+#include "libavutil/intreadwrite.h"
+#include "hflip.h"
+
+static void hflip_byte_c(const uint8_t *src, uint8_t *dst, int w)
+{
+    for (int j = 0; j < w; j++)
+        dst[j] = src[-j];
+}
+
+static void hflip_short_c(const uint8_t *ssrc, uint8_t *ddst, int w)
+{
+    const uint16_t *src = (const uint16_t *)ssrc;
+    uint16_t *dst = (uint16_t *)ddst;
+
+    for (int j = 0; j < w; j++)
+        dst[j] = src[-j];
+}
+
+static void hflip_dword_c(const uint8_t *ssrc, uint8_t *ddst, int w)
+{
+    const uint32_t *src = (const uint32_t *)ssrc;
+    uint32_t *dst = (uint32_t *)ddst;
+
+    for (int j = 0; j < w; j++)
+        dst[j] = src[-j];
+}
+
+static void hflip_b24_c(const uint8_t *src, uint8_t *dst, int w)
+{
+    const uint8_t *in  = src;
+    uint8_t *out = dst;
+
+    for (int j = 0; j < w; j++, out += 3, in -= 3) {
+        int32_t v = AV_RB24(in);
+
+        AV_WB24(out, v);
+    }
+}
+
+static void hflip_b48_c(const uint8_t *src, uint8_t *dst, int w)
+{
+    const uint8_t *in  = src;
+    uint8_t *out = dst;
+
+    for (int j = 0; j < w; j++, out += 6, in -= 6) {
+        int64_t v = AV_RB48(in);
+
+        AV_WB48(out, v);
+    }
+}
+
+static void hflip_qword_c(const uint8_t *ssrc, uint8_t *ddst, int w)
+{
+    const uint64_t *src = (const uint64_t *)ssrc;
+    uint64_t *dst = (uint64_t *)ddst;
+
+    for (int j = 0; j < w; j++)
+        dst[j] = src[-j];
+}
+
+static av_unused int ff_hflip_init(FlipContext *s, int step[4], int nb_planes)
+{
+    for (int i = 0; i < nb_planes; i++) {
+        step[i] *= s->bayer_plus1;
+        switch (step[i]) {
+        case 1: s->flip_line[i] = hflip_byte_c;  break;
+        case 2: s->flip_line[i] = hflip_short_c; break;
+        case 3: s->flip_line[i] = hflip_b24_c;   break;
+        case 4: s->flip_line[i] = hflip_dword_c; break;
+        case 6: s->flip_line[i] = hflip_b48_c;   break;
+        case 8: s->flip_line[i] = hflip_qword_c; break;
+        default:
+            return AVERROR_BUG;
+        }
+    }
+    if (ARCH_X86)
+        ff_hflip_init_x86(s, step, nb_planes);
+
+    return 0;
+}
+
+#endif /* AVFILTER_HFLIP_INIT_H */