avcodec/mpegvideodsp: Make MpegVideoDSP MPEG-4 only

It is only used by gmc/gmc1 which is only used by the MPEG-4
decoder, so move it to Mpeg4DecContext and rename it
to Mpeg4VideoDSP. Also compile it iff the MPEG-4 decoder is compiled.

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

1 files changed, 47 insertions, 0 deletions

diff --git a/libavcodec/mpeg4videodsp.h b/libavcodec/mpeg4videodsp.h
new file mode 100644
index 0000000000..e1ccb71ce9
--- /dev/null
+++ b/libavcodec/mpeg4videodsp.h
@@ -0,0 +1,47 @@
+/*
+ * 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 AVCODEC_MPEG4VIDEODSP_H
+#define AVCODEC_MPEG4VIDEODSP_H
+
+#include <stdint.h>
+
+void ff_gmc_c(uint8_t *dst, const uint8_t *src, int stride, int h, int ox, int oy,
+              int dxx, int dxy, int dyx, int dyy, int shift, int r,
+              int width, int height);
+
+typedef struct Mpeg4VideoDSPContext {
+    /**
+     * translational global motion compensation.
+     */
+    void (*gmc1)(uint8_t *dst /* align 8 */, const uint8_t *src /* align 1 */,
+                 int srcStride, int h, int x16, int y16, int rounder);
+    /**
+     * global motion compensation.
+     */
+    void (*gmc)(uint8_t *dst /* align 8 */, const uint8_t *src /* align 1 */,
+                int stride, int h, int ox, int oy,
+                int dxx, int dxy, int dyx, int dyy,
+                int shift, int r, int width, int height);
+} Mpeg4VideoDSPContext;
+
+void ff_mpeg4videodsp_init(Mpeg4VideoDSPContext *c);
+void ff_mpeg4videodsp_init_ppc(Mpeg4VideoDSPContext *c);
+void ff_mpeg4videodsp_init_x86(Mpeg4VideoDSPContext *c);
+
+#endif /* AVCODEC_MPEG4VIDEODSP_H */