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>

libavfilter/hflip.h

@@ -34,7 +34,6 @@ typedef struct FlipContext {
     void (*flip_line[4])(const uint8_t *src, uint8_t *dst, int w);
 } FlipContext;
 
-int ff_hflip_init(FlipContext *s, int step[4], int nb_planes);
 void ff_hflip_init_x86(FlipContext *s, int step[4], int nb_planes);
 
 #endif /* AVFILTER_HFLIP_H */

libavfilter/vf_hflip.c

@@ -31,6 +31,7 @@
 #include "formats.h"
 #include "hflip.h"
 #include "internal.h"
+#include "vf_hflip_init.h"
 #include "video.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/internal.h"
@@ -61,70 +62,6 @@ static int query_formats(AVFilterContext *ctx)
     return ff_set_common_formats(ctx, pix_fmts);
 }
 
-static void hflip_byte_c(const uint8_t *src, uint8_t *dst, int w)
-{
-    int j;
-
-    for (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;
-    int j;
-
-    for (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;
-    int j;
-
-    for (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;
-    int j;
-
-    for (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;
-    int j;
-
-    for (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;
-    int j;
-
-    for (j = 0; j < w; j++)
-        dst[j] = src[-j];
-}
-
 static int config_props(AVFilterLink *inlink)
 {
     FlipContext *s = inlink->dst->priv;
@@ -145,29 +82,6 @@ static int config_props(AVFilterLink *inlink)
     return ff_hflip_init(s, s->max_step, nb_planes);
 }
 
-int ff_hflip_init(FlipContext *s, int step[4], int nb_planes)
-{
-    int i;
-
-    for (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;
-}
-
 typedef struct ThreadData {
     AVFrame *in, *out;
 } ThreadData;

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 */

tests/checkasm/vf_hflip.c

@@ -19,6 +19,7 @@
 #include <string.h>
 #include "checkasm.h"
 #include "libavfilter/hflip.h"
+#include "libavfilter/vf_hflip_init.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/mem_internal.h"