dsputil: Split off FDCT bits into their own context

1 files changed, 50 insertions, 0 deletions

diff --git a/libavcodec/fdctdsp.c b/libavcodec/fdctdsp.c
new file mode 100644
index 0000000000..b245198b90
--- /dev/null
+++ b/libavcodec/fdctdsp.c
@@ -0,0 +1,50 @@
+/*
+ * 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 "libavutil/attributes.h"
+#include "avcodec.h"
+#include "dct.h"
+#include "faandct.h"
+#include "fdctdsp.h"
+#include "config.h"
+
+av_cold void ff_fdctdsp_init(FDCTDSPContext *c, AVCodecContext *avctx)
+{
+    const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
+
+    if (avctx->bits_per_raw_sample == 10) {
+        c->fdct    = ff_jpeg_fdct_islow_10;
+        c->fdct248 = ff_fdct248_islow_10;
+    } else {
+        if (avctx->dct_algo == FF_DCT_FASTINT) {
+            c->fdct    = ff_fdct_ifast;
+            c->fdct248 = ff_fdct_ifast248;
+        } else if (avctx->dct_algo == FF_DCT_FAAN) {
+            c->fdct    = ff_faandct;
+            c->fdct248 = ff_faandct248;
+        } else {
+            c->fdct    = ff_jpeg_fdct_islow_8; // slow/accurate/default
+            c->fdct248 = ff_fdct248_islow_8;
+        }
+    }
+
+    if (ARCH_PPC)
+        ff_fdctdsp_init_ppc(c, avctx, high_bit_depth);
+    if (ARCH_X86)
+        ff_fdctdsp_init_x86(c, avctx, high_bit_depth);
+}